Commit Graph

3803 Commits

Author SHA1 Message Date
Andrew Stubbs 761ef3b434 amdgcn: Fix build failure
The recent makefile reorganization broke the amdgcn port by creating
duplicate __malloc_lock symbols.  This patch fixes the problem by renaming
the malloc_support.c file to mlock.c, thus overriding the default symbol
properly.  Actually, I'm not sure how this ever worked?
2022-03-22 21:45:16 -04:00
Sebastian Huber 64b208103d iconv: Fix EL/IX level 2 handling
Consistently use

	if !ELIX_LEVEL_1

to enable EL/IX level 2 interfaces.
2022-03-21 11:32:59 +01:00
Jeff Law 0c8679e080 Avoid using common symbols in v850 libgloss
I've had this lying around for probably a year or two at this point.
It just changes all the instance of "errno" from a common symbol to an
extern.  I can't offhand recall where the actual definition is, but it
certainly exists in the generic code.
2022-03-19 20:01:33 -04:00
Mike Frysinger d88cbd0e7c newlib: enable automatic dependency generation
This was disabled as part of the migration away from the cygnus option
as that implied no-dependencies.

We currently have 1-to-1 updates enabled -- if you touch a .c file,
the corresponding .o file will be rebuilt.  But if you touch a header
file, none of the files using that get rebuilt.
2022-03-17 20:38:17 -04:00
Mike Frysinger fb42151a18 newlib: libm: integrate tests subdir
Integrate the old libm/test/ subdir into the main build.  It hasn't
been used in a long time causing the code to rot a bit.  I've fixed
some of those, but it still fails for many ports, so it's disabled
by default.  People who want to take a closer look can run:
$ make libm/test/test
2022-03-16 22:01:19 -04:00
Mike Frysinger 958833a0d3 newlib: integrate iconv update to maintainer build
To help prevent people from missing running this script, integrate it
into the build via maintainer mode.

Also fix the inverted exit status to make this work correctly -- for
some reason, it exited 1 when it worked, and 0 when it failed.
2022-03-16 21:59:57 -04:00
Mike Frysinger f2471da7db newlib: update build system generation documentation
Replace all of the individual autotool steps with a single autoreconf.
This simplifies the documentation greatly, and in the current system,
only takes ~10 seconds to regenerate everything.

Update the developer documentation to cover all the major components
of the current build system.  Hopefully this is a fairly complete road
map to everything.  I tried to include everything that I wish I knew
when I started hacking on this :P.
2022-03-16 21:59:09 -04:00
Mike Frysinger 96bc16f6b2 newlib: libc: merge build up a directory
Convert all the libc/ subdir makes into the top-level Makefile.  This
allows us to build all of libc from the top Makefile without using any
recursive make calls.  This is faster and avoids the funky lib.a logic
where we unpack subdir archives to repack into a single libc.a.  The
machine override logic is maintained though by way of Makefile include
ordering, and source file accumulation in libc_a_SOURCES.

There's a few dummy.c files that are no longer necessary since we aren't
doing the lib.a accumulating, so punt them.

The winsup code has been pulling the internal newlib ssp library out,
but that doesn't exist anymore, so change that to pull the objects.
2022-03-16 21:18:25 -04:00
Mike Frysinger b2d4dc167c newlib: xstormy16: move malloc multiplex logic from build to source files
Rather than define per-object rules in the Makefile, have small files
that define & include the right content.  This simplifies the build
rules, and makes understanding the source a little easier (imo) as it
makes all the subdirs behave the same: you have 1 source file and it
produces 1 object.  It's also about the same amount of boiler plate,
without having to define custom build rules that can fall out of sync.

We also realign the free & pvalloc definitions: common code puts these
in malloc.o & valloc.o respectively, not in free.o & pvalloc.o objects.

This will also be important as we merge the libc.a build into the top
dir since it relies on a single flat list of objects for overrides.
2022-03-13 17:12:03 -04:00
Mike Frysinger 8c383e9ae7 newlib: xstormy16: break up mallocr stubs
Move the multiplex logic out of the build and into source files to
make the build rules a lot simpler.
2022-03-13 17:12:03 -04:00
Mike Frysinger 5cd957ff66 newlib: xstormy16: fix mallopt definition & mstats handling
The mallopt symbol is defined in tiny-malloc.c, not mallocr.c, but
the Makefile in here tries to compile it out of the latter.  This
leads to mallopt never being defined.

The build also creates mallinfo.o & mallopt.o & mallstats.o objects
to override common ones, but the common dir doesn't use these names.
Instead, it places these all in mstats.o.

So move the build define logic to a dedicated file and compile it
directly to make things a bit simpler while fixing the missing func
and aligning objects with the cmomon code.
2022-03-13 17:12:03 -04:00
Mike Frysinger 4ad6b4d4df newlib: libc: move stdlib multiplex logic from build to source files
Rather than define per-object rules in the Makefile, have small files
that define & include the right content.  This simplifies the build
rules, and makes understanding the source a little easier (imo) as it
makes all the subdirs behave the same: you have 1 source file and it
produces 1 object.  It's also about the same amount of boiler plate,
without having to define custom build rules that can fall out of sync.

This will also be important as we merge the libc.a build into the top
dir since it relies on a single flat list of objects for overrides.

Also take the opportunity to clean up the unnecessary header deps in
here.  Automake provides dependency generation for free now.
2022-03-09 16:58:46 -05:00
Sebastian Huber 332df71d34 build: Avoid length() awk function
Some awk implementations such as old versions of mawk do not support the
length() function.  Use the return value of the POSIX split() function instead.
2022-03-09 12:04:11 +01:00
Mike Frysinger b1b44f777c newlib: rename mallocr.c to _mallocr.c
This file is a little confusing: it provides all of the mallocr logic,
but is compiled multiple times to produce a unique symbol each time.
For example, building mallocr.c with -DDEFINE_FREER produces freer.o
that only defines _free_r().  This is fine for most symbols, but it's
a little confusing when defining mallocr itself -- we produce a file
with the same symbol name, but we still need -DDEFINE_MALLOCR.  In
order to move the logic from the build rules to source files, using
mallocr.c both as a multiplexer and for defining a single symbol is a
bit tricky.  It's possible (if we add a lot of redundant preprocessor
checks to mallocr.c, or we add complicated build flags just for this
one files), but it's easier if we simply rename this to a dedicated
file.  So let's do that.

We do this as a dedicated commit because the next one will create a
new mallocr.c file and git's automatic diff algorithms can handle
trivial renames, but it can't handle renames+creates in the same
commit.
2022-03-09 04:12:46 -05:00
Mike Frysinger d7b16b0576 newlib: move nano-malloc logic from build to source files
Simplify the build system logic a bit by moving the mallocr.c ->
nano-mallocr.c redirection from the Makefile to the source files.
This allows for consistent object name usage regardless of the
configuration options used in case a machine dir wants to define
its own override.
2022-03-09 04:12:45 -05:00
Jeff Johnston 5fca4e0f18 Fix Bug libc/28945
- apply fix from Tom de Vries <vries@gcc.gnu.org>
  to have calloc zero out storage for nvptx calloc function
2022-03-07 15:35:02 -05:00
Mike Frysinger dea52d5c1e newlib: convert INTERNAL_NEWLIB to _LIBC
Since we already set up _LIBC to indicate source files are building
for newlib, we don't need this malloc-specific symbol.  Convert it
over to simplify the build a bit.
2022-03-01 20:30:32 -05:00
Mike Frysinger e15b2e8691 newlib: drop redundant AM_MAINTAINER_MODE call
This is already called earlier in this file, so no need to do it again.
2022-03-01 20:30:05 -05:00
Mike Frysinger 644e8bba07 newlib: xstormy16: add missing string.h include
Some of these functions are using memcpy & memset from string.h but
not including the header leading to implicit declaration warnings.
2022-03-01 01:14:33 -05:00
Mike Frysinger a531ad9726 newlib: speed up targ-include setup & add error checking
The current targ-include setup runs `cp` every header file it installs,
in serial.  This can be a little noticeable on systems, so cleanup the
logic to rely on cp's ability to copy multiple files to a directory in
a single call.

We still need a check for empty directories with no headers (i.e. the
glob doesn't match anything), so add a helper variable to contain that
logic to reduce the boiler plate a little.
2022-02-28 19:07:22 -05:00
Mike Frysinger 28724b2f62 newlib: libc: move stdio multiplex logic from build to source files
Rather than define per-object rules in the Makefile, have small files
that define & include the right content.  This simplifies the build
rules, and makes understanding the source a little easier (imo) as it
makes all the subdirs behave the same: you have 1 source file and it
produces 1 object.  It's also about the same amount of boiler plate,
without having to define custom build rules that can fall out of sync.
Some of these rules were already unnecessary as they were compiling a
single source file into the same named object w/out custom flags, and
Automake handles that for us completely.

This will also be important as we merge the libc.a build into the top
dir since it relies on a single flat list of objects for overrides.

Also take the opportunity to clean up the unnecessary header deps in
here.  Automake provides dependency generation for free now.
2022-02-28 19:04:11 -05:00
Mike Frysinger ec5ea6efae newlib: simplify header setup rules
Since POSIX cp requires copying a file to a directory without having
to specify the name explicitly, rely on that to avoid calling basename
on every source file.

We can also drop the stub `true` call if the -f test failed.  The use
of `if` already takes care of that in POSIX shell.
2022-02-28 19:03:57 -05:00
Mike Frysinger 8343db918f newlib: libc: move configure into top-level
This kills off the last configure script under libc/ and folds it
into the top newlib configure script.  The a lot of the logic was
already in the top configure script, so move what's left into a
libc/acinclude.m4 file.
2022-02-25 13:52:48 -05:00
Mike Frysinger 85f2dca52d newlib: add silent rules support to top-level rules 2022-02-24 19:14:12 -05:00
Mike Frysinger acf642177b newlib: fix multilib libg.a parallel builds
I split libg.a out into a sep target from libc.a for the main dir in
commit f2b053f49e ("newlib: separate out
libg from libc"), but missed the multilib dirs.  That leads to an
uncommon parallel build failure:
- libc.a rule runs & finishes
- $(BUILD_MULTISUBDIR)/libc.a rule runs
  -> failure due to libg.a not yet existing
- libg.a rule runs & finishes

Split the multilib libg rule out from libc too so it can depend on the
main libg directly and avoid this race.
2022-02-23 22:01:05 -05:00
Mike Frysinger 5ad394510b newlib: libm: workaround ar duplicate member behavior
GNU ar has undocumented behavior where it doesn't dedupe its inputs if
they're all on the same command line, so we have to dedupe ourselves.
2022-02-23 20:07:10 -05:00
Matt Joyce 44b60f0c4b Make __sdidinit unused
Remove dependency on __sdidinit member of struct _reent to check
object initialization. Like __sdidinit, the __cleanup member of
struct _reent is initialized in the __sinit() function. Checking
initialization against __cleanup serves the same purpose and will
reduce overhead in the __sfp() function in a follow up patch.
2022-02-22 12:38:46 +01:00
Mike Frysinger 416792d59a newlib: libc: delete crt0.o duplication
The crt0.o was handled in a subdir-by-subdir basis: it would be compiled
in one (e.g. libc/sys/$arch/), then copied up one level (libc/sys/), then
copied up another (libc/) before finally being copied & installed in the
top newlib dir.  The libc/sys/ copy was cleaned up, and then the top dir
was changed to copy it directly out of the libc/sys/$arch/ dir.  But the
libc/sys/ copy to libc/ was left behind.  Clean that up now too.
2022-02-18 21:25:32 -05:00
Mike Frysinger 56c65fb8d9 newlib: posix: use local includes for local headers
These headers aren't installed, so use "" includes instead of <> so
we don't search system header paths.  This matches the style used
elsewhere in the tree for these local headers, and makes it work
w/out explicit -I flags (as needed with non-recursive make).
2022-02-18 18:40:57 -05:00
Mike Frysinger ac9f8c46b1 newlib: libm: merge build up a directory
Convert all the libm/ subdir makes into the top-level Makefile.  This
allows us to build all of libm from the top Makefile without using any
recursive make calls.  This is faster and avoids the funky lib.a logic
where we unpack subdir archives to repack into a single libm.a.  The
machine override logic is maintained though by way of Makefile include
ordering, and source file accumulation in libm_a_SOURCES.

One thing to note is that this will require GNU Make because of:
	libm_a_CFLAGS = ... $(libm_a_CFLAGS_$(subst /,_,$(@D)))
This was the only way I could find to supporting per-dir compiler
settings, and I couldn't find a POSIX compatible way of transforming
the variable content.  I don't think this is a big deal as other
Makefiles in the tree are using GNU Make-specific syntax, but I call
this out as it's the only one so far in the new automake code that
I've been writing.

Automake doesn't provide precise control over the output object names
(by design).  This is fine by default as we get consistent names in all
the subdirs: libm_a-<source>.o.  But this relies on using the same set
of compiler flags for all objects.  We currently compile libm/common/
with different optimizations than the rest.

If we want to compile objects differently, we can create an intermediate
archive with the subset of objects with unique flags, and then add those
objects to the main archive.  But Automake will use a different prefix
for the objects, and thus we can't rely on ordering to override.

But if we leverage $@, we can turn Automake's CFLAGS into a multiplex
on a per-dir (and even per-file if we wanted) basis.  Unfortunately,
since $@ contains /, Automake complains it's an invalid name.  While
GNU Make supports this, it's a POSIX extension, so Automake flags it.
Using $(subst) avoids the Automake warning to get a POSIX compliant
name, albeit with a GNU Make extension.
2022-02-17 20:56:32 -05:00
Mike Frysinger f2b053f49e newlib: separate out libg from libc
Make this a separate target from libc so that we can migrate libc over
to automake more easily.  Having it integrated into the libc target is
difficult to handle when using automake rules which expect a one-to-one
mapping between names & inputs.
2022-02-17 20:54:21 -05:00
Mike Frysinger c75bb30fc1 newlib: libc: reshuffle include order for the manual
When migrating the manual to the top-level, the include order was
sorted by name of the subdir.  But this changed the chapter order
of the manual in the process.  Change the sorting back to match
existing chapters and update the comments to explain.
2022-02-17 20:43:51 -05:00
Mike Frysinger 48942fe31a newlib: powerpc: switch to Automake conditionals
Using xxx_LIBADD, xxx_DEPENDENCIES, and EXTRA_xxx_SOURCES is one way of
conditionally including files into a target.  But it's meant more for the
cases where the variables added to LIBADD & DEPENDENCIES are constructed
via substitution (e.g. AC_SUBST) or other dynamic methods.  With Automake
conditionals, then the much simpler form is to conditionally append to
the xxx_SOURCES variable and let Automake sort everything out.
2022-02-17 20:43:51 -05:00
Mike Frysinger bf9f6a0984 newlib: use https:// URIs in more places 2022-02-17 00:48:58 -05:00
Mike Frysinger beadbdfc04 newlib: fix mips fenv.o handling
Commit 8fa73a9f84 changed how fenv.c is
compiled wrt mips16 targets used the wrong variable to add fenv.o to
libm.a.  Fix that thinko so it's included in the build again.
2022-02-16 20:40:53 -05:00
Mike Frysinger 2a83e65fc2 newlib: rtems: drop redundant header install
The top-level newlib dir already takes care of recursing into the
sys/xxx/include/ subdirs and installing any headers found, so the
rtems subdir doesn't need to do this itself.
2022-02-16 20:03:57 -05:00
Mike Frysinger 01ed65ed09 newlib: add missing mkdir to header install
Make sure these subdirs exist before trying to install headers into them.
2022-02-16 20:03:07 -05:00
Mike Frysinger 40748cd73a newlib: powerpc: simplify reallocr & callocr build logic
Replace the custom build rules (which require copying & pasting from the
current Makefile) with small stub files.  This allows us to drop the rules
entirely and let Automake provide everything.
2022-02-16 20:00:27 -05:00
Mike Frysinger d1591ed4a1 newlib: i386/xstormy16: drop unused -I libm/common flag
These subdirs don't actually use anything from libm.  The common dir
in particular only has 4 header files, and none are included here.

The xstormy16 code has a comment mentioning why this hack is here, but
it refers to code that was removed when its configure script was merged
up a level.
2022-02-16 19:58:13 -05:00
Mike Frysinger 907764ebec newlib/libgloss: drop unused $(CROSS_CFLAGS)
This is used in a bunch of places, but nowhere is it ever set, and
nowhere can I find any documentation, nor can I find any other project
using it.  So delete the flags to simplify.
2022-02-15 20:02:51 -05:00
Mike Frysinger df5808b771 newlib: drop support for decstation & sunos systems
These targets don't actually cross-compile -- they try to pull some
objects out of the host's /lib/libc.a, /lib/libm.a, and /lib/crt0.o
directly and merge them into newlib's own libraries.  This is hard
to keep working and impossible to test.  Considering the vintage of
such targets, and gcc dropping them many many years ago, drop them
from newlib too.  This will make cleaning up the build a lot easier.
2022-02-15 20:00:58 -05:00
Mike Frysinger b7f2965dc3 newlib: rename doc/local.mk to Makefile.inc
For consistency across the whole tree.
2022-02-15 19:59:53 -05:00
Mike Frysinger ac90a6590b newlib: phoenix: merge configure up to top-level
Merge sys/phoenix/ configure logic into libc/ itself.  This kills
off the last lingering script in this tree (other than libc itself).
2022-02-15 19:59:08 -05:00
Mike Frysinger 86432e55b4 newlib: phoenix: merge machine/ configure scripts up a level
The machine configure scripts are all effectively stub scripts that
pass the higher level options to its own makefile.
2022-02-15 19:59:08 -05:00
Mike Frysinger d470ef6463 newlib: phoenix: merge machine/ trampoline up a level
The machine/{configure,Makefile} files exist only to fan out to the
specific machine/$arch/ subdir.  We already have all that same info
in the phoenix/ dir itself, so by moving the recursive configure and
make calls into it, we can cut off this logic entirely and save the
overhead.
2022-02-15 19:59:08 -05:00
Mike Frysinger 16c12761fd newlib: phoenix: drop missing machine subdirs
These were never added to the tree, and as we transition from autoconf
to automake, it really wants the latter subdirs to always exist.  These
don't, so delete the logic.
2022-02-15 19:59:08 -05:00
Mike Frysinger 5a6bf1749f newlib: phoenix: move some logic from configure to the Makefile
These configure scripts hardcode some settings, so move them to the
Makefile to simplify so we can drop the configure scripts entirely.
2022-02-15 19:59:08 -05:00
Andoni Arregi ec69debcb9 Improve lgammaf range for very small cases
The original cut for small arguments at |x|<2**-70 (copied from the
double version) produces that when computing nadj we get a subnormal
number for t*x and thus, the division of pi/subnormal will be INF and
the logarithm of it too, which is wrong as a result for lgammaf in this
range.
The proposed new limit seems to be safe and has been tested to
produce accurate results.
(Courtesy of Andreas Jung, ESA)
2022-02-14 14:44:11 +01:00
Mike Frysinger bf167aade1 newlib: remove unused fenv flags
These look like they were just copied & pasted from common/Makefile.am.
The funcs in this dir are all stubs that don't actually call any math
or builtin functions, and a simple compile shows they produce identical
object code.  So delete to simplify the build rules.
2022-02-11 06:26:01 -05:00
Andoni Arregi 8f2bd6f046 Fix expf overflow limit
Correct the overflow limit in the variable o_threshold to be consistent
with the FLT_UWORD_LOG_MAX variable used by the internal implementation
of the expf algorithm itself.
The u_threshold variable has also been modified to be written in the
same format.

Note that this fix improves the situation but does not completely
correct the inconsistencies regarding the overflow and underflow limits
between the expf wrapper (wf_exp.c) and the expf algorithm itself
(ef_exp.c).

Currently these limits are different for the
_FLT_LARGEST_EXPONENT_IS_NORMAL and _FLT_NO_DENORMALS cases as well as
for the case where __OBSOLETE_MATH is not defined (only for the
underflow limit in this case).
2022-02-10 15:59:14 +01:00
Mike Frysinger 1aec525a44 newlib: delete unused autotool regen scripts
These don't work at all now that we've completely upgraded autotools.
2022-02-10 01:39:08 -05:00
Mike Frysinger e95c80b6d8 newlib: libm: fix rebase conflicts
I missed this cleanup when rebasing on top of the latest branch.
2022-02-10 00:36:34 -05:00
Mike Frysinger e114cbc6e1 newlib: libm: move configure into top-level
This kills off the last configure script under libm/ and folds it
into the top newlib configure script.  The vast majority of logic
was already in the top configure script, so move the little that
is left into a libm/acinclude.m4 file.
2022-02-10 00:28:05 -05:00
Mike Frysinger 5b9c4cf23e newlib: drop support for $oext
This was needed only to support libtool in case objects ended in .lo
instead of .o, but we dropped libtool, so drop this too.
2022-02-09 23:35:23 -05:00
Mike Frysinger f034d8ad19 newlib: drop support for $aext
This was needed only to support libtool in case the library ended in
.la instead of .a, but we dropped libtool, so drop this too.
2022-02-09 23:34:17 -05:00
Mike Frysinger 5c21b37214 newlib: fix mkdoc dependencies
Make sure we depend on the right name of mkdoc all the time, and that
the rules that need it (e.g. .def files) depend on it.

Reported-by: Jon Turney <jon.turney@dronecode.org.uk>
2022-02-09 23:26:19 -05:00
Mike Frysinger 006da84337 newlib: drop libtool support
This was only ever used for i?86-pc-linux-gnu targets, but that's been
broken for years, and has since been dropped.  So clean this up too.

This also deletes the funky objectlist logic since it only existed for
the libtool libraries.  Since it was the only thing left in the small
Makefile.shared file, we can punt that too.
2022-02-09 20:27:37 -05:00
Mike Frysinger 5a0ab4454b newlib: punt sys/linux support
This was only used by the i?86-pc-linux-gnu target which we've removed,
and even though it's using a "sys/linux/" dir to make it sound like it
only depends on the Linux kernel, it's actually tied to glibc APIs built
on top of Linux.  Since the code relies on internal glibc APIs and has
been broken for some time, punt it all.  If someone wants to bring it
back, they can try and actually keep the Linux-vs-glibc APIs separate.
2022-02-09 20:27:37 -05:00
Mike Frysinger e01b2bb014 newlib: drop unused iconvdata
This was only ever used for i?86-pc-linux-gnu targets, but that's been
broken for years, and has since been dropped.  So clean this up too.
2022-02-09 20:26:55 -05:00
Mike Frysinger 462d6942f6 newlib: drop i?86-pc-linux-* target support
This was added 20+ years ago.  It seems to have very few (or no users)
as it only works on 32-bit x86 GNU/Linux (i.e. glibc) systems, and even
then only with old versions of glibc.  It hasn't compiled in at least 5
years, but most likely been broken for more like 15 years -- it relies
on internal glibc APIs (like linuxthreads), and that code has changed
and been deleted significantly since.

This single target ends up dragging in a lot of non-trivial code that is
hard to keep working, and currently impossible to verify -- the libtool
and iconvdata and sys/linux/ code isn't used by anything else, but ends
up touching just about every build file in the tree.  Punt the target so
we can start stripping out all these unique code paths.

This commit by itself just disables the target.  We'll start deleting the
individual unused pieces in followups.
2022-02-09 20:23:12 -05:00
Mike Frysinger 401e68c664 newlib: switch to standard AC_PROG_RANLIB
This is basically a noop, but switch to the autoconf macro for finding
a suitable ranlib tool.
2022-02-08 22:18:06 -05:00
Mike Frysinger 985c8f3592 newlib: drop autoconf-2.13 hack
We require autoconf-2.69 now, so we don't need this old install hack.
2022-02-08 22:18:06 -05:00
Mike Frysinger b63a4bb49a newlib: drop cygnus EXEEXT hack
Now that we rely on AC_NO_EXECUTABLES to disable link tests, we don't
need this hack to disable exeext probing.
2022-02-08 22:18:05 -05:00
Mike Frysinger e7ad3f5aa8 newlib: switch to AM_PROG_AR
Now that we require automake-1.15, we can use this macro rather than
do the tool search ourselves.
2022-02-08 21:24:59 -05:00
Mike Frysinger 34af195290 newlib: switch to standard AM_PROG_AS
Now that we require a recent automake version, rely on it to provide AS
and CCAS and CCASFLAGS for us.
2022-02-08 20:19:18 -05:00
Mike Frysinger b9346cee1a newlib: switch to standard AC_PROG_CC
Now that we use AC_NO_EXECUTABLES, and we require a recent version of
autoconf, we don't need to define our own copies of these macros.  So
switch to the standard AC_PROG_CC.
2022-02-08 19:09:26 -05:00
Mike Frysinger 9b50254377 newlib: move AC_NO_EXECUTABLES logic up to common code
This logic was added to libc & libm to get it working again after some
reworks in the CPP handling, but now that that's settled, let's move
this to the common newlib configure logic.  This will make it easier
to consolidate all the configure calls into the top-level newlib dir.

This does create a lot of noise in the generate scripts, but that's
because of the ordering of the calls, not because of correctness. We
will try to draw that back down in follow up commits as we modernize
the toolchain calls in here.
2022-02-08 19:09:26 -05:00
Mike Frysinger 953ba1e6d1 newlib: simplify nds32 automake checks
This code is a bit more convoluted than it needs to be.  GPR_SOURCES
is never set to anything, and the automake checks use negative logic
to add the SP & DP source files to dedicated variables that are only
expanded once.  Get rid of the unused variable, use normal boolean
logic, and collapse the source settings into a single variable.
2022-02-08 19:06:15 -05:00
Mike Frysinger 8fff0aac0a newlib: drop unused xscale subdir
This target was deleted in 2011 in 25fa7e5ad6,
but this directory was missed.  Punt it too.
2022-02-08 19:05:14 -05:00
Mike Frysinger 24b1e4b942 newlib: drop shared documentation rules
Now that the top-level makefile handles these, don't need to copy
these into every single subdir.
2022-02-05 00:18:01 -05:00
Mike Frysinger 6026ef29d8 newlib: move man page generation into top-level build
This allows building the libc & libm pages in parallel, and drops
the duplication in the subdirs with the chew/chapter settings.

The unused rules in Makefile.shared are left in place to minimize
noise in the change.
2022-02-05 00:17:54 -05:00
Mike Frysinger fc2b4ffee0 newlib: libc: move manual into top-level build
This doesn't migrate all the docs, just the libc's manual (pdf/info).
This is to show the basic form of migrating the chew files.

For subdirs that didn't have any docs, I've stripped their settings
for clarity.  If someone wanted to suddenly add docs, they can add
the corresponding Makefile.inc files easily.
2022-02-04 23:57:12 -05:00
Mike Frysinger 44f6310bf9 newlib: libc: include all chapters all the time in the manual
THe stdio subdir is actually required by the documentation.  The
stdio/def is handled dynamically, but libc.texi always expects it
to be included, and fails if it isn't.  So making it required when
building docs is safe.

The xdr subdir is handled dynamically, but it doesn't include any
docs, so the dynamic logic isn't (currently) adding any value.  So
making it required when building docs is safe.

That leaves: iconv, stdio64, posix, and signal subdirs.  The chapters
have a little disclaimer saying they are system-dependent, but even
then, imo having stable manuals regardless of the target is preferable,
and we can add more disclaimer language to these chapters if we want.

This doesn't touch the man page codepaths, just the info/pdf.
2022-02-04 19:39:09 -05:00
Mike Frysinger 3365bd2f7a newlib: libm: move manual into top-level build
This doesn't migrate all the docs, just the libm's manual (pdf/info).
This is to show the basic form of migrating the chew files.
2022-02-04 19:39:05 -05:00
Mike Frysinger 4574c60378 newlib: arm & v850: simplify build rules
Let automake manage whether the objects are included in lib.a.  This
fixes failures after to commit 71086e8b2d
("newlib: delete (most) redundant lib_a_CCASFLAGS=$(AM_CCASFLAGS)") due
to automake generating different set of implicit rules, and the code in
here assuming the names of the generated objects.
2022-02-03 20:45:47 -05:00
Mike Frysinger d5ebf5277e newlib: rename libc_cv_ prefix to newlib_cv_
We've been using both libc_cv_ and newlib_cv_ for our cache vars.
Let's consolidate on newlib_cv_ to avoid conflicts with glibc which
is already using the libc_cv_ prefix.
2022-02-01 21:37:00 -05:00
Mike Frysinger 624e06b3cf newlib: drop unused cache vars from Makefiles
These aren't used in any of the makefiles, so there's no point in
exporting these.  These are only checked in the configure script.
2022-02-01 21:35:47 -05:00
Mike Frysinger 041dd7ff26 newlib: add AC_CACHE_CHECK sugar around preprocessor checks
This isn't strictly necessary, but it makes for much clearer logs as
to what the target is doing, and provides cache vars for anyone who
wants to force the test a different way, and it lets the build cache
its own results when rerunning config.status.
2022-02-01 18:15:51 -05:00
Mike Frysinger 38755463e5 newlib: delete unused iconvdata subdir config
Since commit dcbff9eea7 ("newlib: merge
iconvdata into top-level Makefile"), there is no configure script in
the iconvdata/ subdir, so this call will just issue a warning and not
do anything useful.  Punt it.
2022-02-01 18:13:53 -05:00
Mike Frysinger 4b0e66093c newlib: fix preprocessor checks
Restore the call to AC_NO_EXECUTABLES -- I naively assumed in commit
2e9aa5f56c ("newlib: update preprocessor
configure checks") that checking for a preprocessor would not involve
linking code.  Unfortunately, autoconf will implicitly check that the
compiler "works" before allowing it to be used, and that involves a
link test, and that fails because newlib provides the C library which
is needed to pass a link test.

There is some code in NEWLIB_CONFIGURE specifically to help mitigate
these, but it's not kicking in here for some reason, so let's just add
the AC_NO_EXECUTABLES call back until we can unwind that custom logic.

Additionally, we have to call AC_PROG_CPP explicitly.  This was being
invoked later on, but only in the use_libtool=yes codepath, and that
is almost never enabled.
2022-01-31 22:21:17 -05:00
Mike Frysinger 6a59fc444b newlib: fix cygwin -I path
This code snippet assumed it was only ever run in the top configure
script where srcdir would point to newlib/ which is parallel to the
winsup/ tree.  This is incorrect for all of the subdir configure
scripts leading to bad -I flags in $(CC).  Switch it over to the
new abs_newlib_basedir which should work in all subdirs.
2022-01-29 01:35:30 -05:00
Mike Frysinger fc0bd2eb03 newlib: use abs_newlib_basedir for -I paths
When we had configure scripts in subdirs, the newlib_basedir value
was computed relative to that, and it'd be the same when used in the
Makefile in the same dir.  With many subdir configure scripts removed,
the top-level configure & Makefile can't use the same relative path.
So switch the subdir Makefiles over to abs_newlib_basedir when they
use -I to find source headers.

Do this for all subdirs, even ones with configure scripts and where
newlib_basedir works.  This makes the code consistent, and avoids
surprises if the configure script is ever removed in the future as
part of merging to the higher level.

Some of the subdirs were using -I$(newlib_basedir)/../newlib/ for
some reason.  Collapse those too since newlib_basedir points to the
newlib source tree already.
2022-01-29 01:35:30 -05:00
Mike Frysinger 6444f108d9 newlib: export abs_newlib_basedir for all subdirs
When using the top-level configure script but subdir Makefiles, the
newlib_basedir value gets a bit out of sync: it's relative to where
configure lives, not where the Makefile lives.  Move the abs setting
from the top-level configure script into acinclude.m4 so we can rely
on it being available everywhere.  Although this commit doesn't use
it anywhere, just lays the groundwork.
2022-01-29 01:35:30 -05:00
Mike Frysinger 7a4bef590b newlib: hoist crt0 install up another dir
Commit dd23de27c8 ("newlib: libc: install
CRT0 straight out of subdir") got rid of the libc/sys/ intermediate for
copying the file up, but the top-level newlib/ dir was still expecting
a libc/crt0.o to exist so it could install.  Update that to also look
for the crt0 file directly under libc/ like we already do for crt1.
2022-01-28 07:27:19 -05:00
Mike Frysinger dcbff9eea7 newlib: merge iconvdata into top-level Makefile
Avoid a recursive make with this tiny subdir to speed things up a bit.
2022-01-27 19:14:57 -05:00
Mike Frysinger 996a85ba4c newlib: drop unused saber file
I can't find any references to this, and it looks like a generated
build log from a specific old sparc system.
2022-01-27 19:14:21 -05:00
Mike Frysinger 866de704f3 newlib: fix info+man page builds
The work to merge libc/machine/ up a dir lost the stub doc targets.
So when libc/ recursed into machine/, it would stop going deeper as
the doc rules were empty.  But now that libc/ goes directly into the
libc/machine/$arch/ and those have never had doc stubs, the build
fails.  Add a quick hack to the top dir to ignore all machine/$arch/
dirs when generating docs.  A follow up series will delete all of
this code as it merges all the doc rules into the top newlib dir.
2022-01-26 21:41:47 -05:00
Cyril Yared 73d515fcfe Fix null-pointer dereference in nano-malloc
If p is NULL, then the free_list is empty and we should return the
correct failure values.
2022-01-26 13:14:03 +01:00
Mike Frysinger ee3ed2b65e newlib: switch to multilib.am
We use the common config-ml.in for configure, so switch the makefile
over to the common multilib.am.  It's almost exactly the same code,
but there are two differences:
* Common code hooks install-exec-local for install-multi, but newlib
  doesn't currently install any executables, so that doesn't fire.
  Newlib already has install-data-local that inlined install-multi,
  so switch that to the common install-multi.
* Common code doesn't provide a check-multi at all.  Keep ours for
  now.  Some day common code might get it.  Or not.  Who knows.
2022-01-26 04:17:34 -05:00
Mike Frysinger 08a55a233d newlib: libc: merge machine/ configure scripts up a level
The machine configure scripts are all effectively stub scripts that
pass the higher level options to its own makefile.  There were only
three doing custom tests.  The rest were all effectively the same as
the libc/ configure script.

So instead of recursively running configure in all of these subdirs,
generate their makefiles from the top-level configure.  For the few
unique ones, deploy a pattern of including subdir logic via m4:
	m4_include([machine/nds32/acinclude.m4])

Some of the generated machine makefiles have a bunch of extra stuff
added to them, but that's because they were inconsistent in their
configure libtool calls.  The top-level has it, so it exports some
new vars to the ones that weren't already.
2022-01-26 03:11:21 -05:00
Mike Frysinger 8bee45444f newlib: libc: merge most sys/ configure scripts up a level
The sys configure scripts are almost all effectively stub scripts that
pass the higher level options to its own makefile.  The phoenix & linux
ones are a bit more complicated with nested subdirs, so those have been
left alone for now.  Plus, I don't really have a way of testing them.
2022-01-26 03:11:21 -05:00
Mike Frysinger dd23de27c8 newlib: libc: install CRT0 straight out of subdir
There's no need to have a sys/ subdir just to copy the sys/$arch/crt0.o
up to sys/crt0.o, and then have libc/ copy sys/crt0.o up again.  Just
have libc/ refer to sys/$arch/crt0.o directly and drop the intermediate
makefile entirely.
2022-01-26 03:11:21 -05:00
Mike Frysinger fbfeebc221 newlib: libc: merge sys/ trampoline up a level
The sys/{configure,Makefile} files exist to fan out to the specific
sys/$arch/ subdir, and to possibly generate a crt0.  We already have
all that same info in the libc/ dir itself, so by moving the recursive
configure and make calls into it, we can cut off some of this logic
entirely and save the overhead.

For arches that don't have a sys subdir, it means they can skip the
logic entirely.

The sys subdir itself is kept for the crt0 logic, for now.  We'll try
and clean that up next.
2022-01-26 03:11:20 -05:00
Mike Frysinger db2ef77287 newlib: libc: merge machine/ trampoline up a level
The machine/{configure,Makefile} files exist only to fan out to the
specific machine/$arch/ subdir.  We already have all that same info
in the libc/ dir itself, so by moving the recursive configure and
make calls into it, we can cut off this logic entirely and save the
overhead.

For arches that don't have a machine subdir, it means they can skip
the logic entirely.  Although there's prob not too many of those.
2022-01-26 03:11:20 -05:00
Mike Frysinger 2339979934 newlib: libm: merge machine/ configure scripts up a level
The machine configure scripts are all effectively stub scripts that
pass the higher level options to its own makefile.  The only one doing
any custom tests was nds32.  The rest were all effectively the same as
the libm/ configure script.

So instead of recursively running configure in all of these subdirs,
generate their makefiles from the top-level configure.  For nds32,
deploy a pattern of including subdir logic via m4:
	m4_include([machine/nds32/acinclude.m4])

Even its set of checks are very small -- it does 2 preprocessor tests
and sets up 2 makefile conditionals.

Some of the generated machine makefiles have a bunch of extra stuff
added to them, but that's because they were inconsistent in their
configure libtool calls.  The top-level has it, so it exports some
new vars to the ones that weren't already.
2022-01-26 03:11:20 -05:00
Mike Frysinger 6ac043b192 newlib: libm: merge machine/ trampoline up a level
The machine/{configure,Makefile} files exist only to fan out to the
specific machine/$arch/ subdir.  We already have all that same info
in the libm/ dir itself, so by moving the recursive configure and
make calls into it, we can cut off this logic entirely and save the
overhead.

For arches that don't have a machine subdir, it means they can skip
the logic entirely.
2022-01-26 03:11:20 -05:00
Mike Frysinger 5420733ef3 newlib: libm: drop unused config.h.in file
Not sure how this snuck in.  It's never been used in libm/, so punt it.
2022-01-25 21:56:47 -05:00
Mike Frysinger 5dc4e2089a newlib: powerpc: move libc machine list to Makefile
This makes the makefile logic a bit cleaner so we don't have two
files maintaining lists of sources & objects.  Since the logic is
tied to cpu capabilities, past those boolean settings down from
the configure logic to the makefile logic.

This will also make it easier to throw away the configure script
in a follow up commit and just keep the makefile.
2022-01-23 22:35:21 -05:00
Mike Frysinger 2e9aa5f56c newlib: update preprocessor configure checks
The nds32 & spu dirs are using compile tests to look for some
preprocessor defines, but we don't need to compile the code,
just preprocess it.  So switch to AC_PREPROC_IFELSE.

The sh dir is using a preprocessor test via grep, but let's
switch it to AC_PREPROC_IFELSE too to be consistent.

This should allow us to drop the uncommon AC_NO_EXECUTABLES call.
2022-01-23 22:35:21 -05:00
Mike Frysinger dcb25665be newlib: punt unused LIBC_EXTRA_LIB settings
This was added decades ago, but the commit message lacks any
explanation, and it was unused when it was merged.  It's still
unused today.  So punt it all.
2022-01-21 17:29:46 -05:00
Mike Frysinger 8776d090f8 newlib: stop making .def generation conditional
Generating these files is very cheap, so let's just do it all the time.
This makes the build logic simpler, and keeps errors for slipping in in
codepaths that are not well tested.  Creating these files doesn't mean
they'll be included in the manual implicitly.

For example, some of the nano stdio files break documentation because
they don't have any chew directives in them.  But no one noticed since
that code path is rarely enabled.  So drop the _i and _float def files.
2022-01-21 17:28:54 -05:00
Mike Frysinger 4af3551136 newlib: drop redundant CFLAGS export
This is already handled by autotools for us automatically.  You can
tell as the generated output is exactly the same other than deleting
a few blank lines.
2022-01-21 17:27:55 -05:00
Mike Frysinger f159663b08 newlib: stop clobbering LDFLAGS with non-standard $ldflags
It's unclear why this was added originally, but assuming it was needed
20 years ago, it shouldn't be explicitly required nowadays.  Current
versions of autotools already take care of exporting LDFLAGS to the
Makefile as needed (things are actually getting linked).  That's why
the configure diffs show LDFLAGS still here, but shifted to a diff
place in the output list.  A few dirs stop exporting LDFLAGS, but
that's because they don't do any linking, only compiling, so it's
correct.

As for the use of $ldflags instead of the standard $LDFLAGS, I can't
really explain that at all.  Just use the right name so users don't
have to dig into why their setting isn't respected, and then use a
non-standard name instead.  Adjust the testsuite to match.
2022-01-21 17:10:10 -05:00
Mike Frysinger 4317e0676a newlib: stop checking --enable-multilib in subdirs
None of the subdirs actually use the multilib arg, so include the
logic only in the top-level configure.
2022-01-21 17:10:10 -05:00
Mike Frysinger 17c2b857dc newlib: move to ../config/multi.m4 for multilib logic
The current newlib multilib logic is almost exactly the same as the
config/multi.m4, and the differences should be minor, so switch over
to that to delete custom logic on ourside.
2022-01-21 17:10:09 -05:00
Mike Frysinger 5cc72ac79d newlib: punt unused template file
This was needed by ancient versions of automake, but that hasn't been
the case since at least automake-1.5, so punt this unused stub.
2022-01-21 07:18:25 -05:00
Mike Frysinger 55e09d5e8c newlib: switch to autoconf long double macro
Now that we require a recent version of autoconf, we can rely on this
macro working.  This change was already made to libm, but these other
dirs were missed as I didn't notice it being duplicated in 3 places.
2022-01-21 07:07:15 -05:00
Mike Frysinger 0a67325726 newlib: switch newlib.h to autoheader
Now that newlib.hin has been brought up to date and all of its defines
are produced by configure, we can switch it to using autoheader without
manual editing.  This relies on a few pieces:
* Moving the header & footer into configure.ac via AH_TOP & AH_BOTTOM.
* Running a post-process step on newlib.h to delete all the defines we
  didn't export ourselves.  Basically, anything without a _ prefix.

This will leave behind some spurious comments in newlib.h related to
the defines we filtered out, but should be harmless, so it's probably
not worth the effort to construct a more complicated sed expression to
also strip those out.
2022-01-19 19:59:16 -05:00
Mike Frysinger b86dc2dab4 newlib: iconv: autogenerate iconv define list
The list of iconv to/from defines is hand maintained in newlib.hin.
Lets leverage mkdeps.pl to generate this list automatically from the
list of known encodings.  The newlib.hin list is up-to-date, so the
list in iconv.m4 matches the list already generated.
2022-01-19 19:59:16 -05:00
Mike Frysinger 15c091ad73 newlib: add missing _NANO_MALLOC to newlib.hin
This was added to configure, but never to the header file.  Nothing
uses this currently, so it's not a big deal (as all the dynamic logic
is via automake conditionals), but might as well restore it now to
keep autoheader output in sync.
2022-01-19 19:59:16 -05:00
Mike Frysinger 21fb1b461c newlib: move version defines out of the config headers
This will make it easier to move newlib.h to use autoheader directly.
We only want the newlib version defines in our hand curated version
file, _newlib_version.h, not in the template header, newlib.h, so
using AC_DEFINE doesn't make much sense.
2022-01-19 19:59:16 -05:00
Mike Frysinger 850e08fedb newlib: sort newlib.h output
Sort the symbols lexically like autoheader does.  There are no other
changes in here.  This will make it easier to sync with autoheader.
2022-01-19 19:59:16 -05:00
Mike Frysinger 810c5e5979 newlib: clean up autoheader templates
Sync these back from newlib.hin to configure.ac, and touchup some of
the forms to be consistent (like being full sentences).  Also use the
AC_DEFINE-vs-AC_DEFINE_UNQUOTED macros correctly.  This will make it
easier to re-enable autoheader for managing newlib.hin.
2022-01-19 19:59:16 -05:00
Mike Frysinger ff5be4ab83 newlib: merge acconfig.h changes into newlib.hin
The acconfig.h header was used to run autoheader and then manually
sync the output into newlib.hin.  Based on how the files have fallen
out of sync (with newlib.hin having many more templates), this has
not been run in a long time, and attempts to do so now would break
newlib.hin.

Further, if you try to run autoheader now, it will automatically
replace _newlib_version.hin since it's the first entry in the call
to AC_CONFIG_HEADERS.

So let's throw away acconfig.h entirely.  It only had 2 slightly
better comments, and the rest were either worse, missing, or stale.
This has the side benefit of avoiding autoheader warning about the
deprecated use of acconfig.h since newer autoconf only wants macro
calls in configure.ac.
2022-01-19 19:59:16 -05:00
Mike Frysinger 437c5c5085 newlib: internalize HAVE_INITFINI_ARRAY
This define is only used by newlib internally, so stop exporting it
as HAVE_INITFINI_ARRAY since this can conflict with defines packages
use themselves.

We don't really need to add _ to HAVE_INIT_FINI too since it isn't
exported in newlib.h, but might as well be consistent here.

We can't (easily) add this to newlib_cflags like HAVE_INIT_FINI is
because this is based on a compile-time test in the top configure,
not on plain shell code in configure.host.  We'd have to replicate
the test in every subdir in order to have it passed down.
2022-01-19 19:59:16 -05:00
Mike Frysinger 6783cceb0a newlib: libm: switch to autoconf long double macro
Now that we require a recent version of autoconf, we can rely on this
macro working.  We shift the call in configure.ac down a little to
help keep the generated diff minimal -- there should be no functional
difference otherwise.  This is because the autoconf macros will call
a bunch of standard toolchain macros first, and arguably the current
code is incorrect in how it does its testing.
2022-01-19 18:51:04 -05:00
Mike Frysinger 84ff8d9477 newlib: iconv: sort ccsbi.c contents
The current output doesn't happen to match what is produced on my
system, so force _iconv_ccs to be sorted like is already done in
the ccsbi.h header.
2022-01-18 19:34:31 -05:00
Mike Frysinger 7113ecbe79 newlib: iconv: sync mkdeps.pl with aliasesbi.c changes
Some changes were made to aliasesbi.c, but not to this file which
dynamically generates it.  Add those fixes to this file too.
2022-01-18 19:34:31 -05:00
Mike Frysinger ac3d869afb newlib: drop autoconf-2.59 workaround
As the file comments say, this was a backport of an autoconf-2.60 fix,
and shouldn't matter for >autoconf-2.59 versions.  Drop it since we use
and require autoconf-2.69 now.
2022-01-18 19:31:58 -05:00
Mike Frysinger a492b26065 newlib: enable automake subdir-objects in all dirs
Currently this is only enabled in the top-level as that's the only
place where it seemed to be used.  But the libc/sys/phoenix/ dir
also uses this functionality, but fails to explicitly enable it.
Automake workedaround it, but generated warnings.  Move the option
to NEWLIB_CONFIGURE so all dirs get it automatically iff they end
up using the option.  If they don't use the option, there's no
difference to the generated code.
2022-01-18 19:28:24 -05:00
Mike Frysinger 6746e06043 newlib: avoid duplicate awk checks
Since AM_INIT_AUTOMAKE calls AC_PROG_AWK, and some configure.ac
scripts call it too, we end up testing for awk multiple times.  If
we change NEWLIB_CONFIGURE to require the macro instead, then it
makes sure it's always expanded, but only once.

While we're here, do the same thing with AC_PROG_INSTALL since it
is also called by AM_INIT_AUTOMAKE, although it doesn't currently
result in duplicate configure checks.
2022-01-18 19:25:18 -05:00
Mike Frysinger 3722489f1f newlib: merge old AC_LIBTOOL_WIN32_DLL macro into LT_INIT
The AC_LIBTOOL_WIN32_DLL macro has been deprecated for a while and code
should call LT_INIT with win32-dll instead.  Update the calls to match.

The generated code is noisy not because of substantial differences, but
because the order of some macros change (i.e. instead of calling AS and
then CC, CC is called first and then AS).
2022-01-18 19:15:44 -05:00
Mike Frysinger fe591ba3f7 newlib: update libtool macro name
Replace old AM_PROG_LIBTOOL name with LT_INIT.  There's no change to
the generated files since they're aliases internally.
2022-01-18 19:15:44 -05:00
Mike Frysinger 71086e8b2d newlib: delete (most) redundant lib_a_CCASFLAGS=$(AM_CCASFLAGS)
Since automake already sets per-library CCASFLAGS to $(AM_CCASFLAGS)
by default, there's no need to explicitly set it here.

Many of these dirs don't have .S files in the first place, so the rule
doesn't even do anything.  That can easily be seen when Makefile.in has
no changes as a result.

For the dirs with .S files, the custom rules are the same as the pattern
.S.o rules, so this is a nice cleanup.

The only dir that was adding extra flags (newlib/libc/machine/mn10300/)
to the per-library setting can have it moved to the global AM_CCASFLAGS
since the subdir only has one target.  Although the setting just adds
extra debugging flags, so maybe it should be deleted in general.

There are a few dirs that we leave the redundant setting in place.  This
is to workaround an automake limitation in subdirs that support building
with & w/out libtool:
https://www.gnu.org/software/automake/manual/html_node/Objects-created-both-with-libtool-and-without.html
2022-01-18 19:12:02 -05:00
Mike Frysinger 20e3103471 newlib: update to automake-1.15
This matches what the other GNU toolchain projects have done already.
The generated diff in practice isn't terribly large.  This will allow
more use of subdir local.mk includes due to fixes & improvements that
came after the 1.11 release series.
2022-01-14 19:10:38 -05:00
Mike Frysinger a100e80fc9 require autoconf-2.69 exactly
The newlib & libgloss dirs are already generated using autoconf-2.69.
To avoid merging new code and/or accidental regeneration using diff
versions, leverage config/override.m4 to pin to 2.69 exactly.  This
matches what gcc/binutils/gdb are already doing.

The README file already says to use autoconf-2.69.

To accomplish this, it's just as simple as adding -I flags to the
top-level config/ dir when running aclocal.  This is because the
override.m4 file overrides AC_INIT to first require the specific
autoconf version before calling the real AC_INIT.
2022-01-14 15:24:33 -05:00
Nick Alcock 5ab7dd14e1 libtool.m4: fix nm BSD flag detection
Libtool needs to get BSD-format (or MS-format) output out of the system
nm, so that it can scan generated object files for symbol names for
-export-symbols-regex support.  Some nms need specific flags to turn on
BSD-formatted output, so libtool checks for this in its AC_PATH_NM.
Unfortunately the code to do this has a pair of interlocking flaws:

 - it runs the test by doing an nm of /dev/null.  Some platforms
   reasonably refuse to do an nm on a device file, but before now this
   has only been worked around by assuming that the error message has a
   specific textual form emitted by Tru64 nm, and that getting this
   error means this is Tru64 nm and that nm -B would work to produce
   BSD-format output, even though the test never actually got anything
   but an error message out of nm -B.  This is fixable by nm'ing *nm
   itself* (since we necessarily have a path to it).

 - the test is entirely skipped if NM is set in the environment, on the
   grounds that the user has overridden the test: but the user cannot
   reasonably be expected to know that libtool wants not only nm but
   also flags forcing BSD-format output.  Worse yet, one such "user" is
   the top-level Cygnus configure script, which neither tests for
   nor specifies any BSD-format flags.  So platforms needing BSD-format
   flags always fail to set them when run in a Cygnus tree, breaking
   -export-symbols-regex on such platforms.  Libtool also needs to
   augment $LD on some platforms, but this is done unconditionally,
   augmenting whatever the user specified: the nm check should do the
   same.

   One wrinkle: if the user has overridden $NM, a path might have been
   provided: so we use the user-specified path if there was one, and
   otherwise do the path search as usual.  (If the nm specified doesn't
   work, this might lead to a few extra pointless path searches -- but
   the test is going to fail anyway, so that's not a problem.)

(Tested with NM unset, and set to nm, /usr/bin/nm, my-nm where my-nm is a
symlink to /usr/bin/nm on the PATH, and /not-on-the-path/my-nm where
*that* is a symlink to /usr/bin/nm.)

ChangeLog
2021-09-27  Nick Alcock  <nick.alcock@oracle.com>

	PR libctf/27967
	* libtool.m4 (LT_PATH_NM): Try BSDization flags with a user-provided
	NM, if there is one.  Run nm on itself, not on /dev/null, to avoid
	errors from nms that refuse to work on non-regular files.  Remove
	other workarounds for this problem.  Strip out blank lines from the
	nm output.
2022-01-12 08:49:10 -05:00
Nick Alcock 4fe13b8d95 libtool.m4: augment symcode for Solaris 11
This reports common symbols like GNU nm, via a type code of 'C'.

ChangeLog
2021-09-27  Nick Alcock  <nick.alcock@oracle.com>

	PR libctf/27967
	* libtool.m4 (lt_cv_sys_global_symbol_pipe): Augment symcode for
	Solaris 11.
2022-01-12 08:47:00 -05:00
Alexander von Gluck IV 8a563bfdd7 Add support for the haiku operating system. These are the os support patches we have been grooming and maintaining for quite a few years over on git.haiku-os.org. All of these architectures are working and most have been stable for quite some time. 2022-01-12 08:43:25 -05:00
H.J. Lu 88d86e5970 GCC: Check if AR works with --plugin and rc
AR from older binutils doesn't work with --plugin and rc:

[hjl@gnu-cfl-2 bin]$ touch foo.c
[hjl@gnu-cfl-2 bin]$ ar --plugin /usr/libexec/gcc/x86_64-redhat-linux/10/liblto_plugin.so rc libfoo.a foo.c
[hjl@gnu-cfl-2 bin]$ ./ar --plugin /usr/libexec/gcc/x86_64-redhat-linux/10/liblto_plugin.so rc libfoo.a foo.c
./ar: no operation specified
[hjl@gnu-cfl-2 bin]$ ./ar --version
GNU ar (Linux/GNU Binutils) 2.29.51.0.1.20180112
Copyright (C) 2018 Free Software Foundation, Inc.
This program is free software; you may redistribute it under the terms of
the GNU General Public License version 3 or (at your option) any later version.
This program has absolutely no warranty.
[hjl@gnu-cfl-2 bin]$

Check if AR works with --plugin and rc before passing --plugin to AR and
RANLIB.

	PR ld/27173
	* configure: Regenerated.
	* libtool.m4 (_LT_CMD_OLD_ARCHIVE): Check if AR works with
	--plugin and rc before enabling --plugin.

config/

	PR ld/27173
	* gcc-plugin.m4 (GCC_PLUGIN_OPTION): Check if AR works with
	--plugin and rc before enabling --plugin.

libiberty/

	PR ld/27173
	* configure: Regenerated.

zlib/

	PR ld/27173
	* configure: Regenerated.
2022-01-12 08:43:14 -05:00
H.J. Lu d8d5dac0fe GCC: Pass --plugin to AR and RANLIB
Detect GCC LTO plugin.  Pass --plugin to AR and RANLIB to support LTO
build.

	* Makefile.tpl (AR): Add @AR_PLUGIN_OPTION@
	(RANLIB): Add @RANLIB_PLUGIN_OPTION@.
	* configure.ac: Include config/gcc-plugin.m4.
	AC_SUBST AR_PLUGIN_OPTION and RANLIB_PLUGIN_OPTION.
	* libtool.m4 (_LT_CMD_OLD_ARCHIVE): Pass --plugin to AR and
	RANLIB if possible.
	* Makefile.in: Regenerated.
	* configure: Likewise.

config/

	* gcc-plugin.m4 (GCC_PLUGIN_OPTION): New.

libiberty/

	* Makefile.in (AR): Add @AR_PLUGIN_OPTION@
	(RANLIB): Add @RANLIB_PLUGIN_OPTION@.
	(configure_deps): Depend on ../config/gcc-plugin.m4.
	* aclocal.m4: Include ../config/gcc-plugin.m4.
	* configure.ac: AC_SUBST AR_PLUGIN_OPTION and
	RANLIB_PLUGIN_OPTION.
	* configure: Regenerated.

zlib/

	* configure: Regenerated.
2022-01-12 08:43:05 -05:00
Samuel Thibault 4a3b4d50e3 libtool.m4: update GNU/Hurd test from upstream. In upstream libtool, 47a889a4ca20 ("Improve GNU/Hurd support.") fixed detection of shlibpath_overrides_runpath, thus avoiding unnecessary relink. This backports it.
.	* libtool.m4: Match gnu* along other GNU systems.

*/ChangeLog:

	* configure: Re-generate.
2022-01-12 07:19:46 -05:00
Mike Frysinger 8fc6b4b30e newlib: regen aclocal.m4 after autoconf update
The configure scripts were regenerated with 2.69 for the newlib-4.2.0
release in 484d2ebf8d, but the aclocal
files were not.  Do that now to avoid confusion between the two as to
which version of autoconf was used.
2022-01-12 07:01:18 -05:00
Corinna Vinschen 935c33877d posix_spawn: fix get/set uid/gid calls for 32 bit Cygwin
32 bit Cygwin still exports function calls to support old applications.
E. g., when switching from 16 to 32 bit uid/gid values, new function
like getuid32 have been added and the old getuid function still only
provides 16 bit values.  Newly built applications using getuid are
actually calling getuid32.

However, this link magic isn't performed inside Cygwin itself, so if
newlib functions call getuid, they actually call the old getuid, not
the new getuid32.  This leads to truncated uid/gid values.

https://cygwin.com/pipermail/cygwin/2022-January/250453.html reports
how this leads to problems in posix_spawn.

Fix this temporarily. i686 support will go away soon in Cygwin and the
fix can be dropped.

Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
2022-01-12 11:57:35 +01:00
Sebastian Huber ebe756e466 powerpc/setjmp: Improve RTEMS support
For some RTEMS multilibs, the FPU and Altivec units are disabled during
interrupt handling.  Do not save and restore the corresponding registers in
this case.
2022-01-11 09:15:03 +01:00
Keith Thompson d4e61b73a9 Fix documented argv and envp params for posix_spawn 2022-01-10 09:57:05 +01:00
Mike Frysinger 54d77a0a56 newlib: use .texi with libc & libm manuals
Newer automake warns that .texinfo extensions are discouraged in favor
of .texi, so rename the manuals to match.
2022-01-07 15:54:10 -05:00
Jon Turney 87bfe673a3
newlib: README: libgloss no longer uses '--cygnus' automake option 2022-01-06 16:20:14 +00:00
Mike Frysinger 5a94ffd57a newlib: fix silent build in a few subdirs
A few subdirs have custom compile rules.  Utilize AM_V_xxx settings
so they respect the silent build option.
2022-01-05 20:38:25 -05:00
Mike Frysinger ed20821a40 newlib: migrate from INCLUDES to AM_CPPFLAGS
Since automake deprecated the INCLUDES name in favor of AM_CPPFLAGS,
change all existing users over.  The generated code is the same since
the two variables have been used in the same exact places by design.

There are other cleanups to be done, but lets focus on just renaming
here so we can upgrade to a newer automake version w/out triggering
new warnings.
2022-01-05 20:29:53 -05:00
Guilherme Janczak 8e71066cb2 update OpenBSD string functions
A lot of the 3rd party code in the string library is around 20 years
old and has been worked on since.
I've updated the OpenBSD functions at least.
2022-01-05 17:11:47 +01:00
Jeff Johnston 484d2ebf8d Update newlib to 4.2.0 2021-12-31 12:46:13 -05:00
Mike Frysinger 1162f09b6c newlib: require automake-1.11.6
This is simply reflecting reality: all the subdirs in here are already
using automake-1.11.6, so making it a requirement will allow us to stop
suggesting we might support automake-1.9 or 1.10 (which I'm fairly sure
do not work today).

This is why only acinclude.m4 changes in this patch: the generated files
are exactly the same as the directives here are automake constraints,
not generated code logic.
2021-12-31 12:08:18 -05:00
Jon Turney bfcabeb876
newlib: Regenerate autotools files 2021-12-29 22:45:06 +00:00
Jon Turney a4e734fcdb
newlib: Remove automake option 'cygnus'
The 'cygnus' option was removed from automake 1.13 in 2012, so the
presence of this option prevents that or a later version of automake
being used.

A check-list of the effects of '--cygnus' from the automake 1.12
documentation, and steps taken (where possible) to preserve those
effects (See also this thread [1] for discussion on that):

[1] https://lists.gnu.org/archive/html/bug-automake/2012-03/msg00048.html

1. The foreign strictness is implied.

Already present in AM_INIT_AUTOMAKE in newlib/acinclude.m4

2. The options no-installinfo, no-dependencies and no-dist are implied.

Already present in AM_INIT_AUTOMAKE in newlib/acinclude.m4

Future work: Remove no-dependencies and any explicit header dependencies,
and use automatic dependency tracking instead.  Are there explicit rules
which are now redundant to removing no-installinfo and no-dist?

3. The macro AM_MAINTAINER_MODE is required.

Already present in newlib/acinclude.m4

Note that maintainer-mode is still disabled by default.

4. Info files are always created in the build directory, and not in the
source directory.

This appears to be an error in the automake documentation describing
'--cygnus' [2]. newlib's info files are generated in the source
directory, and no special steps are needed to keep doing that.

[2] https://lists.gnu.org/archive/html/bug-automake/2012-04/msg00028.html

5. texinfo.tex is not required if a Texinfo source file is specified.
(The assumption is that the file will be supplied, but in a place that
automake cannot find.)

This effect is overriden by an explicit setting of the TEXINFO_TEX
variable (the directory part of which is fed into texi2X via the
TEXINPUTS environment variable).

6. Certain tools will be searched for in the build tree as well as in the
user's PATH. These tools are runtest, expect, makeinfo and texi2dvi.

For obscure automake reasons, this effect of '--cygnus' is not active
for makeinfo in newlib's configury.

However, there appears to be top-level configury which selects in-tree
runtest, expect and makeinfo, if present. So, if that works as it
appears, this effect is preserved. If not, this may cause problem if
anyone is building those tools in-tree.

This effect is not preserved for texi2dvi. This may cause problems if
anyone is building texinfo in-tree.

If needed, explicit checks for those tools looking in places relative to
$(top_srcdir)/../ as well as in PATH could be added.

7. The check target doesn't depend on all.

This effect is not preseved. The check target now depends on the all
target.

This concern seems somewhat academic given the current state of the
testsuite.

Also note that this doesn't touch libgloss.
2021-12-29 22:45:04 +00:00
Jon Turney 8e166351b3
newlib: Regenerate autotools files 2021-12-29 22:45:03 +00:00
Jon Turney 320510de2c
newlib: Make effects of 'cygnus' explicit
Add all the effects of 'cygnus' for which there exists an explicit way
to request that behaviour:

* Implied foreign strictness and options no-installinfo, no-dependencies
and no-dist are added to AM_INIT_AUTOMAKE in newlib/acinclude.m4.

* macro AM_MAINTAINER_MODE is added to newlib/acinclude.m4.

* For the implied TEXINFO_TEX of '$(top_srcdir)/../texinfo/texinfo.tex',
an explicit TEXINFO_TEX is always relative to $(srcdir), so write the
same pathname in that form.

This is to prepare for the removal of the automake option '--cygnus'.
2021-12-29 22:44:49 +00:00
Jon Turney ff71c3fcdb
README: configure.in -> configure.ac
These files were renamed from that long deprecated name in commit
92061799.
2021-12-13 18:47:11 +00:00
Jon Turney 639cb7ec1a
newlib: Regenerate all autotools files
Regenerate all aclocal.m4, configure and Makefile.in files.
2021-12-09 21:41:35 +00:00
Jon Turney 2b6f088ac3
newlib: Enable automake silent rules
Use AM_SILENT_RULES, to enable automake silent rules (by default), if we
are using a version of automake which supports it (>=1.11).

Silent rules can be disabled by configuring with '--disable-silent-rules',
or invoking 'make V=1'.

For ease of reviewing, this patch doesn't contain configure and
Makefile.in regeneration.

Future work: There are a few compilations which are not silenced by
this, as they use custom rules.
2021-12-09 21:41:05 +00:00
Takashi Yano a4705d387f ldtoa: Import gdtoa from OpenBSD.
- This patch uses gdtoa imported from OpenBSD if newlib configure
  option "--enable-newlib-use-gdtoa=no" is NOT specified.  gdtoa
  provides more accurate output and faster conversion than legacy
  ldtoa, while it requires more heap memory.
2021-12-03 19:20:17 +09:00
Takashi Yano 34876c05a5 frexpl: Support smaller long double of LDBL_MANT_DIG == 53.
- Currently, frexpl() supports only the following cases.
    1) LDBL_MANT_DIG == 64 or 113
    2) 'long double' is equivalent to 'double'
  This patch add support for LDBL_MANT_DIG == 53.
2021-12-03 19:14:03 +09:00
Corinna Vinschen dbc7d28ba9 Revert "ctype: use less short names in public header"
This patch fixed a problem which isn't in newlib, but in projects
incorrectly using symbols from the reserved namespace.

This reverts commit 3ba1bd0d9d.
2021-12-03 10:50:58 +01:00
Jeff Johnston 8fa73a9f84 Modifying patch from: marian.buschsieweke@ovgu.de
The code accessing the floating point control/status register, namely

	#define	__cfc1(__fcsr)	__asm __volatile("cfc1 %0, $31" : "=r" (__fcsr)

does not compile with mips16. This changed the makefile to pass -mno-mips16 to avoid the following
compiler error:

	mips-mti-elf fails with "Error: unrecognized opcode `cfc1 $3,$31'"
2021-11-30 11:23:39 -05:00
Takashi Yano 48f6c59332 stdio: Fix issue of printing "%La" format with large exp part.
- Currently, printf("%La\n", 1e1000L) crashes with segv due to lack
  of frexpl() function. With this patch, frexpl() function has been
  implemented in libm to solve this issue.

Addresses: https://sourceware.org/pipermail/newlib/2021/018718.html
2021-11-29 22:51:16 +09:00
Takashi Yano f885632f4f ldtoa: Fix insufficient valid output digits for "%f" format.
- If the number has large integer part and small fraction part is
  specified in output format, e.g. printf("%.3f", sqrt(2)*1e60);,
  valid output digits were insufficient. This patch fixes the issue.
2021-11-26 17:29:40 +09:00
Corinna Vinschen 68faeef4be ldtoa: don't restrict outbuf size to ndigits
https://cygwin.com/pipermail/cygwin/2021-November/249930.html
reported a regression introduce by using a dynamically sized local
char array in favor of a statically sized array.

Fix this by reverting to a statically sized array, using a small
buffer on the stack for a reasonable number of requested digits, a
big mallocated buffer otherwise.  This should work for small targets
as well, given that malloc is used in printf anyway right now.

This is *still* hopefully just a temporary measure, unless somebody
actually provides a new ldtoa.

Fixes: 4d90e53359 ("ldtoa: fix dropping too many digits from output")
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
2021-11-22 13:57:16 +01:00
Jon Turney ad68ec27c3
Fix 'make man' after 67208d9e
Remove a left over use of doc/Makefile after 67208d9e ('newlib: merge
doc into top-level Makefile') to fix 'make man'.
2021-11-16 17:59:56 +00:00
Thomas Wolff 076c856739 cleanup Unicode data files after generating updated tables 2021-11-16 11:24:29 +01:00
Thomas Wolff 3cef6dfb5e update to Unicode 14.0 2021-11-16 11:24:29 +01:00
Mike Frysinger 67208d9ef8 newlib: merge doc into top-level Makefile
Avoid a recursive make with this tiny subdir to speed things up a bit.
2021-11-15 19:35:04 -05:00
Mike Frysinger 6226bad0ea change _COMPILING_NEWLIB to _LIBC
Use the same name as glibc & gnulib to indicate "newlib itself is
being compiled".  This also harmonizes the codebase a bit in that
_LIBC was already used in places instead of _COMPILING_NEWLIB.

Building for bfin-elf, mips-elf, and x86_64-pc-cygwin produces
the same object code.
2021-11-15 19:32:23 -05:00
Mike Frysinger df5de02e0e newlib: ignore _FORTIFY_SOURCE when building newlib
Some distros enable _FORTIFY_SOURCE by default which upsets building
newlib which itself implements the logic for this define.  For example,
building gets.c fails because the includes set up a gets() macro which
expands in the definition.

Since newlib isn't prepared to build itself with _FORTIFY_SOURCE, and
it's not clear if it's even useful, ignore it when building the code.
This also matches what glibc is doing.
2021-11-13 00:09:21 -05:00
Mike Frysinger 372093689c define _COMPILING_NEWLIB for all targets when compiling
The _COMPILING_NEWLIB symbol is for declaring "the code is being
compiled for newlib itself" so headers can change behavior vs the
header being used by users (who should get the normal clean API).
Unfortunately, this symbol is defined inconsistently leading to it
only being useful for a few subsections of the tree.

Pull it out so that it's defined all the time for all targets.
2021-11-11 17:26:45 -05:00
Mike Frysinger 3ba1bd0d9d ctype: use less short names in public header
We're seeing a build failure in GNU sim code which is using _P locally
but the ctype.h define clashes with it.  Rename these to use the same
symbols that glibc does.  They're a bit more verbose, but seems likely
that we'll have fewer conflicts if glibc isn't seeing them.

However, these shortnames are still used internally by ctype modules
to produce pretty concise source code, so move the short names to the
internal ctype_.h where short name conflicts shouldn't show up.
2021-11-11 17:26:45 -05:00
Mike Frysinger 328e1b1a3d newlib: mips: delete glibc-specific logic
This code looks like it's written to be copied & pasted between diff
C libraries and relies on _LIBC only being used with glibc.  This will
break when newlib changes from _COMPILING_NEWLIB to _LIBC, so delete
the glibc-specific logic ahead of time.
2021-11-09 19:21:13 -05:00
Mike Frysinger 59e83de0b1 libgloss/newlib: update configure.ac in Makefile.in files
The maintainer rules refer to configure.in directly, so update that
after renaming all the configure.ac files.
2021-11-06 14:14:49 -04:00
Corinna Vinschen 4d90e53359 ldtoa: fix dropping too many digits from output
ldtoa cuts the number of digits it returns based on a computation of
number of supported bits (144) divide by log10(2).  Not only is the
integer approximation of log10(2) ~= 8/27 missing a digit here, it
also fails to take really small double and long double values into
account.

Allow for the full potential precision of long double values.  At the
same time, change the local string array allocation to request only as
much bytes as necessary to support the caller-requested number of
digits, to keep the stack size low on small targets.

In the long run a better fix would be to switch to gdtoa, as the BSD
variants, as well as Mingw64 do.

Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
2021-11-04 13:14:17 +01:00
Christian Biesinger via Newlib 26894de91d Unconditionally declare strsignal
Currently, newlib does not declare strsignal if DEFS_H is defined,
ostensibly to work around a gdb bug. However, gdb itself compiles
even with this ifndef removed, and this makes sim (another part of
gdb) fail to compile.

Since it is not clear exactly what issue this was working around,
this patch just replaces that ifdef with the correct check,
i.e. __POSIX_VISIBLE >= 200809.
2021-10-27 20:02:06 +02:00
Keith Packard c51f05c597 string: Fix buffer overrun in picolibc/newlib/libc/string/strrchr.c (#184)
Reported by prodisDown:

	In picolibc/newlib/libc/string/strrchr.c

	if (i) { while ((s=strchr(s, i))) { last = s; s++; } } else { last = strchr(s, i); }

	Value (for example 0xFFFFFF00) in if (i) can pass test and
	then be typecasted to char inside strchr(). Then s++ and then
	buffer overrun.

	It can be fixed by preventive typecast i = (int) (char) i; or
	typecasting inside expression if ((char) i).

Fixed by casting to char.

Signed-off-by: Keith Packard <keithp@keithp.com>
2021-10-13 16:39:49 -04:00
Sebastian Huber eb03ac17f1 sys/tree.h: Red child with black sibling rotations
Add specialized rotations RB_RED_ROTATE_LEFT() and RB_RED_ROTATE_RIGHT() which
may be used if we rotate a red child which has a black sibling.  Such a red
node must have at least two child nodes so that the following red-black tree
invariant is fulfilled:

  Every path from a given node to any of its descendant NULL nodes goes through
  the same number of black nodes.

      PARENT
     /      \
  BLACK     RED
           /   \
        BLACK BLACK
2021-10-07 17:58:36 +02:00
Sebastian Huber 5f7f27c817 sys/tree.h: Add parent rotations
Add specialized rotations RB_PARENT_ROTATE_LEFT() and RB_PARENT_ROTATE_RIGHT()
which may be used if the parent node exists and the direction of the child is
known.  The specialized rotations are derived from RB_ROTATE_LEFT() and
RB_ROTATE_RIGHT() where the RB_SWAP_CHILD() was replaced by a simple
assignment.
2021-10-05 17:21:18 +02:00
Sebastian Huber ee30f991c3 sys/tree.h: Simplify chain of conditions
In RB_GENERATE_REMOVE_COLOR() simplify a chain of conditions of the following
pattern

if (x) {
  ...
} else if (!x) {
  ...
}

to

if (x) {
  ...
} else {
  ...
}
2021-10-05 16:09:50 +02:00
Sebastian Huber 098cf0f98d sys/tree.h: Simplify loop condition
We have

  #define RB_ISRED(elm, field) \
    ((elm) != NULL && RB_COLOR(elm, field) == RB_RED)

So, the RB_ISRED() contains an implicit check for NULL.  In
RB_GENERATE_REMOVE_COLOR() the "elm" pointer cannot be NULL in the while
condition.  Use RB_COLOR(elm) == RB_BLACK instead.
2021-10-05 16:09:11 +02:00
Mike Frysinger 6e64fccb5f newlib: sig2str: use __restrict
This matches the header prototype style and most of newlib, and fixes
building with older versions of gcc which only accept the __ form.
2021-09-15 10:08:20 -04:00
Corinna Vinschen 8c8d3b7a94 Regenerate Makefile.in after configure.in -> configure.ac change
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
2021-09-13 17:25:46 +02:00
Mike Frysinger e8e0eb7398 Add myself to sim & general write-after-approval maintainers
There are a few files that are tied to the GNU simulator, so add myself
to match the general sim project.

Also add myself to the general write-after-approval since I've been doing
that for a long time now anyways :).
2021-09-13 10:14:37 -04:00
Mike Frysinger 920617998e libgloss/newlib: rename configure.in to configure.ac
The .in name has been deprecated for a long time in favor of .ac.
2021-09-13 10:14:37 -04:00
Torbjorn SVENSSON via Newlib 522cdab541 nano-malloc: Fix redefined compilation warning
When newlib is configured with --enable-newlib-reent-check-verify,
the assert macro is already defined in the nano-mallocr.c compile unit.

Contributed by STMicroelectronics

Signed-off-by: Torbjörn SVENSSON <torbjorn.svensson@st.com>
2021-09-06 20:29:39 +02:00
Corinna Vinschen 76c2c7a891 ldexp/ldexpf: avoid assembler warning
libm/machine/i386/f_ldexp.S:30: Warning: no instruction mnemonic suffix given and no register operands; using default for `fild'
libm/machine/i386/f_ldexpf.S:30: Warning: no instruction mnemonic suffix given and no register operands; using default for `fild'

fix this by adding the l mnemonic suffix

Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
2021-09-03 12:52:47 +02:00
Corinna Vinschen c2fe205b50 strstr: avoid warnings
unused function warning for two_way_short_needle,
different char type warnings for standard string functions

Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
2021-09-03 12:51:30 +02:00
Corinna Vinschen 6a35ae33f5 nftw: fix thread cancellation support
_STDIO_WITH_THREAD_CANCELLATION_SUPPORT was never defined.
Include ../stdio/local.h to get the right definition per target.

Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
2021-09-03 12:26:17 +02:00
Joel Sherrill dcb515a953 libc/include/sys/signal.h: Change __STDINT_EXP() to __SIZEOF_INT__
__STDINT_EXP() is provided by newlib but not by stdint-gcc.h. stdint-gcc.h
is used when the GCC argument -ffreestanding is used and this results in this
file not compiling.
2021-08-27 11:41:56 -05:00
Roger Sayle 6bb96d13a2 nvptx: Emulate clock and other machine stubs.
This patch to the libc/machine/nvptx port of newlib implements an
approximation of "clock" and provides some additional stub routines.
These changes not only reduce the number of (link) failures in the GCC
testsuite when targeting nvptx-none, but also allow the NIST scimark4
benchmark to compile and run without modification.

newlib already contains support for backends to provide their own
clock implementations via -DCLOCK_PROVIDED.  That functionality is
used here to return an approximate elapsed time based on the NVidia
GPU's clock64 cycle counter.  Although not great, this is better than
the current behaviour of link error from the unresolved symbol
_times_r.

The other part of the patch is to add a small number of stub functions
to nvptx's misc.c.  Adding isatty, for example, resolves linking
problems in libc from the dependency in __smakebuf_r, and the sync
stub, for example, fixes the failure with GCC's
testsuite/gfortran.dg/ISO_Fortran_binding_14.f90 [which simply tests
that gfortran can call a/any C function].

newlib/
        configure.host: Add -DCLOCK_PROVIDED to newlib_cflags on nvptx*.

newlib/libc/machine/nvptx
        Makefile.am: Add clock.c to lib_a_SOURCES.
        clock.c: New source file to implement/approximate clock().
        misc.c: Add stubs for fstat, isatty, open, sync and unlink.
2021-08-25 10:20:27 +02:00
Corinna Vinschen bc0e8a9961 stdlib: conditionalize locale usage
_strtod_l as well as the gethex function both fetch the decimal point
from the current LC_NUMERIC locale info.  This pulls in _C_numeric_locale
unconditionally even on targets not supporting locales at all.

Another problem is that strtod.c and gdtoa-gethex.c are ELIX 1, while
locale information in general isn't.  This leads to potential build
breakage on bare metal targets.

Fix this by setting the decimal point to "." on all targets not
defining __HAVE_LOCALE_INFO__.

While at it, const'ify the entire local decimal point info in the
affected functions.

Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
2021-08-23 10:02:00 +02:00
Keith Packard cf86601d98 svfwscanf: Simplify _sungetwc_r to eliminate apparent buffer overflow
svfwscanf replaces getwc and ungetwc_r. The comments in the code talk
about avoiding file operations, but they also need to bypass the
mbtowc calls as svfwscanf operates on wchar_t, not multibyte data,
which is a more important reason here; they would not work correctly
otherwise.

The ungetwc replacement has code which uses the 3 byte FILE _ubuf
field, but if wchar_t is 32-bits, this field is not large enough to
hold even one wchar_t value. Building in this mode generates warnings
about array overflow:

	In file included from ../../newlib/libc/stdio/svfiwscanf.c:35:
	../../newlib/libc/stdio/vfwscanf.c: In function '_sungetwc_r.isra':
	../../newlib/libc/stdio/vfwscanf.c:316:12: warning: array subscript 4294967295 is above array bounds of 'unsigned char[3]' [-Warray-bounds]
	  316 |   fp->_p = &fp->_ubuf[sizeof (fp->_ubuf) - sizeof (wchar_t)];
	      |            ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
	In file included from ../../newlib/libc/stdio/stdio.h:46,
			 from ../../newlib/libc/stdio/vfwscanf.c:82,
			 from ../../newlib/libc/stdio/svfiwscanf.c:35:
	../../newlib/libc/include/sys/reent.h:216:17: note: while referencing '_ubuf'
	  216 |   unsigned char _ubuf[3]; /* guarantee an ungetc() buffer */
	      |                 ^~~~~

However, the vfwscanf code *never* ungets data before the start of the
scanning operation, and *always* ungets data which matches the input
at that point, so the code always hits the block which backs up over
the input data and never hits the block which uses the _ubuf field.

In addition, the svfwscanf code will always start with the unget
buffer empty, so the ungetwc replacement never needs to support an
unget buffer at all.

Simplify the code by removing support for everything other than
backing up over the input data, leaving the check to make sure it
doesn't get underflowed in case the vfscanf code has a bug in it.

Signed-off-by: Keith Packard <keithp@keithp.com>
2021-08-18 10:37:24 +02:00
Matt Joyce 4f81149937 libc: Added prototypes for new POSIX APIs
Added function prototypes to newlib/libc/include/pthread.h
for the following Issue 8 Standard APIs:
pthread_cond_clockwait()
pthread_mutex_clocklock()
pthread_rwlock_clockrdlock()
pthread_rwlock_clockwrlock()
2021-08-09 10:29:55 +02:00
Christoph Muellner 15c53a34bc libc: Fix compilation for new sig2str/str2sig implementation
A recent patch introduced new code for sig2str/str2sig.
This code does not properly exclude code that requires
SIGRTMIN/SIGRTMAX to be defined and triggers the following
compile error:

  newlib/libc/signal/sig2str.c:199:8: error: 'SIGRTMIN' undeclared
  newlib/libc/signal/sig2str.c:200:29: error: 'SIGRTMAX' undeclared

Let's add the missing guards.

Fixes: 2b50ec0cd2 ("libc: Fix compilation for new sig2str/str2sig implementation")

Signed-off-by: Christoph Muellner <cmuellner@gcc.gnu.org>
2021-08-02 16:42:03 +02:00
Matt Joyce 2b50ec0cd2 libc: Added implementation for sig2str/str2sig.
Added implementations for sig2str() and str2sig() in libc/signal
in order to improve POSIX compliance. Added fucntion prototypes
in libc/include/sys/signal.h.
2021-08-02 11:28:15 +02:00
Maxim Blinov 0542583129 Remove unneccesary parenthesis around declarator
riscv64-unknown-elf-g++-11.1.0 regression suite reports the following
failures for

$ make check-gcc-c++ RUNTESTFLAGS='dg.exp=Wstringop-overflow-6.C'

```
FAIL: g++.dg/warn/Wstringop-overflow-6.C  -std=gnu++14 (test for excess errors)
FAIL: g++.dg/warn/Wstringop-overflow-6.C  -std=gnu++17 (test for excess errors)
FAIL: g++.dg/warn/Wstringop-overflow-6.C  -std=gnu++2a (test for excess errors)
UNSUPPORTED: g++.dg/warn/Wstringop-overflow-6.C  -std=gnu++98
```

The "excess errors" being

```
output is In file included from /home/maxim/prj/riscv-upstream/install/riscv64-unknown-elf/include/wchar.h:6,
                 from /home/maxim/prj/riscv-upstream/build/gcc-stage2/riscv64-unknown-elf/libstdc++-v3/include/cwchar:44,
                 from /home/maxim/prj/riscv-upstream/build/gcc-stage2/riscv64-unknown-elf/libstdc++-v3/include/bits/postypes.h:40,
                 from /home/maxim/prj/riscv-upstream/build/gcc-stage2/riscv64-unknown-elf/libstdc++-v3/include/iosfwd:40,
                 from /home/maxim/prj/riscv-upstream/build/gcc-stage2/riscv64-unknown-elf/libstdc++-v3/include/ios:38,
                 from /home/maxim/prj/riscv-upstream/build/gcc-stage2/riscv64-unknown-elf/libstdc++-v3/include/ostream:38,
                 from /home/maxim/prj/riscv-upstream/build/gcc-stage2/riscv64-unknown-elf/libstdc++-v3/include/iostream:39,
                 from /home/maxim/prj/riscv-upstream/gcc-11.1.0/gcc/testsuite/g++.dg/warn/Wstringop-overflow-6.C:6:
/home/maxim/prj/riscv-upstream/install/riscv64-unknown-elf/include/sys/reent.h:685:11: warning: unnecessary parentheses in declaration of '_sig_func' [-Wparentheses]
```
2021-07-28 11:12:42 +02:00
Alex White 44a3966577 libc/include/sys/config.h: Undef _REENT_SMALL for RTEMS on MicroBlaze
RTEMS does not expect _REENT_SMALL.
2021-07-22 09:35:17 +02:00
Kito Cheng ca7b4bd236 libm: Fixing overflow handling issue for scalbnf and scalbn
cc Aldy Hernandez <aldyh@redhat.com> and Andrew MacLeod <amacleod@redhat.com>,
they are author of new VRP analysis for GCC, just to make sure I didn't
mis-understanding or mis-interpreting anything on GCC site.

GCC 11 have better value range analysis, that give GCC more confidence
to perform more aggressive optimization, but it cause scalbn/scalbnf get
wrong result.

Using scalbn to demostrate what happened on GCC 11, see comments with VRP
prefix:

```c
double scalbn (double x, int n)
{
	/* VRP RESULT: n = [-INF, +INF] */
        __int32_t  k,hx,lx;
        ...
        k = (hx&0x7ff00000)>>20;
	/* VRP RESULT: k = [0, 2047] */
        if (k==0) {
	    /* VRP RESULT: k = 0 */
	    ...
	    k = ((hx&0x7ff00000)>>20) - 54;
            if (n< -50000) return tiny*x;       /*underflow*/
	    /* VRP RESULT: k = -54 */
	}
	/* VRP RESULT: k = [-54, 2047] */
        if (k==0x7ff) return x+x;               /* NaN or Inf */
	/* VRP RESULT: k = [-54, 2046] */
        k = k+n;
        if (k > 0x7fe) return huge*copysign(huge,x); /* overflow  */
	/* VRP RESULT: k = [-INF, 2046] */
	/* VRP RESULT: n = [-INF, 2100],
	   because k + n <= 0x7fe is false, so:
	   1. -INF < [-54, 2046] + n <= 0x7fe(2046) < INF
	   2. -INF < [-54, 2046] + n <= 2046 < INF
	   3. -INF < n <= 2046 - [-54, 2046] < INF
	   4. -INF < n <= [0, 2100] < INF
	   5. n = [-INF, 2100] */
        if (k > 0)                              /* normal result */
            {SET_HIGH_WORD(x,(hx&0x800fffff)|(k<<20)); return x;}
        if (k <= -54) {
	    /* VRP OPT: Evaluate n > 50000 as true...*/
            if (n > 50000)      /* in case integer overflow in n+k */
                return huge*copysign(huge,x);   /*overflow*/
            else return tiny*copysign(tiny,x);  /*underflow*/
	}
        k += 54;                                /* subnormal result */
        SET_HIGH_WORD(x,(hx&0x800fffff)|(k<<20));
        return x*twom54;
}
```

However give the input n = INT32_MAX, k = k+n will overflow, and then we
expect got `huge*copysign(huge,x)`, but new VRP optimization think
`n > 50000` is never be true, so optimize that into `tiny*copysign(tiny,x)`.

so the solution here is to moving the overflow handle logic before `k = k + n`.
2021-07-21 09:56:04 +02:00
Kito Cheng 91f99d323b Minimal support for ISO/IEC TS 18661-3.
- GCC will set __FLT_EVAL_METHOD__ to 16 if __fp16 supported, e.g.
   cortex-a55/aarch64.
   - $ aarch64-unknown-elf-gcc -v 2>&1 |grep version
     gcc version 9.2.0 (GCC)
   - $ aarch64-unknown-elf-gcc  -E -dM -mcpu=cortex-a55 - < /dev/null  |grep FLT_EVAL_METHOD
     #define __FLT_EVAL_METHOD__ 16
     #define __FLT_EVAL_METHOD_TS_18661_3__ 16
     #define __FLT_EVAL_METHOD_C99__ 16
 - The behavior of __FLT_EVAL_METHOD__ == 16 is same as
   __FLT_EVAL_METHOD__ == 0 except for float16_t, but newlib didn't
   support float16_t.

ISO/IEC TS 18661-3:
http://www.open-std.org/jtc1/sc22/wg14/www/docs/n2405.pdf

V2 Changes:
- List Howland, Craig D as co-author since he provide the draft of comment
  in math.h.

Co-authored-by: "Howland, Craig D" <howland@LGSInnovations.com>
2021-07-12 21:07:43 +02:00
Keith Packard fb01286fab stdlib: Make strtod/strtof set ERANGE consistently for underflow.
The C standard says that errno may acquire the value ERANGE if the
result from strtod underflows. According to IEEE 754, underflow occurs
whenever the value cannot be represented in normalized form.

Newlib is inconsistent in this, setting errno to ERANGE only if the
value underflows to zero, but not for denorm values, and never for hex
format floats.

This patch attempts to consistently set errno to ERANGE for all
'underflow' conditions, which is to say all values which are not
exactly zero and which cannot be represented in normalized form.

This matches glibc behavior, as well as the Linux, Mac OS X, OpenBSD,
FreeBSD and SunOS strtod man pages.

Signed-off-by: Keith Packard <keithp@keithp.com>
2021-07-07 13:22:02 -04:00
Thomas Wolff 204ee3cf6a fix and amend scripts and makefile rules to generate Unicode data 2021-07-06 15:35:37 +02:00
Thomas Wolff 11fdae24b7 update to Unicode 13.0 2021-07-06 15:35:37 +02:00
Jonathan Wakely a39ae40b86 inttypes.h: Use reserved names for function parameters 2021-06-25 16:48:31 -04:00
Keith Packard 92068f4cc5 stdio: Parse 0x0p+00 correctly in scanf
The scanf code was skipping the '0' after the 'x' causing the
resulting buffer to contain an invalid number when passed to strtod.

Signed-off-by: Keith Packard <keithp@keithp.com>
2021-06-18 17:15:37 -04:00
Joel Sherrill 90a72f27d5 newlib/doc/makedoc.c: if realloc() fails, exit with an error message. 2021-06-17 16:48:47 -05:00
Joel Sherrill 609f5a51c6 newlib/doc/makedoc.c: Fix memory leak identified by Coverity. 2021-06-17 16:27:49 -05:00
Joel Sherrill 59584ff16b libc/sys/rtems/crt0.c: Fix two warnings.
__assert_func() is marked as noreturn and stub should not.
	__tls_get_addr() needed to return a value..
2021-06-17 12:58:36 -05:00
Dimitar Dimitrov b585151016 pru: Enable -ffunction-sections and -fdata-sections
Recent binutils support --gc-sections for pru, so let's make use of
them.

Signed-off-by: Dimitar Dimitrov <dimitar@dinux.eu>
2021-06-09 14:07:14 -04:00
Jeff Johnston a9165ea07c Fix rounding issues with sqrt/sqrtf
- compiler is sometimes optimizing out the rounding check in
  e_sqrt.c and ef_sqrt.c which uses two constants to create
  an inexact operation
- there is a similar constant operation in s_tanh.c/sf_tanh.c
- make the one and tiny constants volatile to stop this
2021-06-04 14:42:58 -04:00
Richard Earnshaw 2a3a03972b aarch64: support binary mode for opening files
Newlib for aarch64 uses libgloss for the backend.  One common libgloss
implementation is the 'rdimon' implementation, which uses the Arm
Semihosting protocol.  In order to support a remote host that runs on
Windows we need to know whether a file is to be opened in binary or
text mode.  That means that we need to preserve this information via
O_BINARY until we know what the libgloss binding will be.

This patch simply copies the arm implementation from sys/arm/sys and
puts it in machine/aarch64/sys, because we don't have a 'sys' subtree
on aarch64.
2021-05-26 15:17:11 +01:00
Joel Sherrill 0c0f3df224 sys/stat.h: Enable UTIME_NOW and UTIME_OMIT for RTEMS 2021-05-20 10:04:07 +02:00
Ola Olsson 84d068971d Nano-malloc: Fix for unwanted external heap fragmentation
The only reason why it is tough for us to use nano malloc
is because of the small shortcoming where nano_malloc()
splits a bigger chunk from the free list into two pieces
while handing back the second one (the tail) to the user.
This is error prone and especially bad for smaller heaps,
where nano malloc is supposed to be superior. The normal
malloc doesn't have this issue and we need to use it even
though it costs us ~2k bytes compared to nano-malloc.

The problem arise especially after giving back _every_
malloced memory to the heap and then starting to exercise
the heap again by allocating something small. This small
item might split the whole heap in two equally big parts
depending on how the heap has been exercised before.

I have uploaded the smallest possible application
(only tested on ST and Nordic devices) to show the issue
while the real customer applications are far more complicated:
https://drive.google.com/file/d/1kfSC2KOm3Os3mI7EBd-U0j63qVs8xMbt/view?usp=sharing

The application works like the following pseudo code,
where we assume a heap of 100 bytes
(I haven't taken padding and other nitty and gritty
details into account. Everything to simplify understanding):

void *ptr = malloc(52); // We get 52 bytes and we have
                        // 48 bytes to use.
free(ptr); // Hand back the 52 bytes to nano_malloc
           // This is the magic line that shows the issue of
           // nano_malloc
ptr = malloc(1); // Nano malloc will split the 52 bytes
                 // in the free list and hand you a pointer
                 // somewhere in the
                 // middle of the heap.
ptr2 = malloc(52); // Out of memory...

I have done a fix which hands back the first part of the
splitted chunk. Once this is fixed we obviously
have the 1 byte placed in position 0 of the heap instead
of somewhere in the middle.

However, this won't let us malloc 52 new bytes even though
we potentially have 99 bytes left to use in the heap. The
reason is that when we try to do the allocation,
nano-malloc looks into the free list and sees a 51 byte
chunk to be used.
This is not big enough so nano-malloc decides to call
sbrk for _another_ 52 bytes which is not possible since
there is only 48 bytes left to ask for.

The solution for this problem is to check if the last
item in the free list is adjacent to sbrk(0). If it is,
as it is in this case, we can just ask sbrk for the
remainder of what is needed. In this case 1 byte.

NB! I have only tested the solution on our ST device.
2021-05-03 13:00:33 +02:00
Mike Frysinger ae6e6c3526 bfin: add myself as maintainer 2021-04-26 11:38:35 +02:00
Ties Stuij 282445a10e fix some Arm FP routines not checking if floating point is enabled
A lot of the Arm FP routines check for the availability of floating point by way
of `(__ARM_FP & 0x4)`. However some do not. This patch remedies this.
2021-04-21 16:18:09 +01:00
Corinna Vinschen 9c6c2fb0f6 scanf: allow hex float input per POSIX
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
2021-04-19 22:00:10 +02:00
David Macek 7078248485 fenv: fix up stub file comment, drop symlinks from description
also slightly fixed up formatting
2021-04-13 12:55:34 +02:00
Corinna Vinschen cc19109af9 Cygwin: don't export _feinitialise from newlib
Use the more official fesetenv(FE_DFL_ENV) from _dll_crt0, thus
allowing to drop the _feinitialise declaration from fenv.h.

Provide a no-op _feinitialise in Cygwin as exportable symbol for really
old applications when _feinitialise was called from mainCRTStartup in
crt0.o.

Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
2021-04-13 12:55:34 +02:00
Corinna Vinschen 3b22d72255 fenv: drop Cygwin-specific implementation in favor of newlib code
Drop the Cygwin-specific fenv.cc and fenv.h file and use the equivalent
newlib functionality now, so we have at least one example of a user for
this new mechanism.

fenv.c: allow _feinitialise to be called from Cygwin startup code

fenv.h: add declarations for fegetprec and fesetprec for Cygwin only.
        Fix a comment.

Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
2021-04-13 12:55:34 +02:00
Corinna Vinschen 642be00cdb fenv: move shared x86 fenv.c to libm/machine/shared_x86
Include this file from both sharing architectures, i386 and x86_64.

Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
2021-04-13 12:55:33 +02:00
Corinna Vinschen 05753071c0 fenv: Move shared x86 sys/fenv.h from x86_64 to shared_x86
drop matching symlink in i386

Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
2021-04-13 12:55:33 +02:00
Corinna Vinschen 79ac4237dc fenv: add missing declarations to x86 fenv.h
feenableexcept, fedisableexcept and fegetexcept were
accidentally missing in the x86 fenv.h

Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
2021-04-13 12:55:33 +02:00
Corinna Vinschen c326ca1615 configure.host: define shared ix86 and x86_64 directory
Add a directory libc/machine/shared_x86 to share header files
between ix86 and x86_64 architectures.

Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
2021-04-13 12:55:33 +02:00
Corinna Vinschen 80bd01ef83 Add build mechanism to share common header files between machines
So far the build mechanism in newlib only allowed to either define
machine-specific headers, or headers shared between all machines.
In some cases, architectures are sufficiently alike to share header
files between them, but not with other architectures.  A good example
is ix86 vs. x86_64, which share certain traits with each other, but
not with other architectures.

Introduce a new configure variable called "shared_machine_dir".  This
dir can then be used for headers shared between architectures.

Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
2021-04-13 12:55:33 +02:00
Jeff Johnston 1debd4d635 Regenerate lib/posix/Makefile.in 2021-03-05 15:23:24 -05:00
Marcus Comstedt 26478769a6 RISC-V: Fix optimized strcmp on big endian 2021-02-25 12:14:18 +01:00
Marcus Comstedt 1a6fd3f05f Set __IEEE_BIG_ENDIAN for big endian RISC-V 2021-02-25 12:14:18 +01:00
Hans-Peter Nilsson c1a565c396 Include malloc.h in libc/stdlib/aligned_alloc.c
Without this, for a bare-iron/simulator target such as cris-elf,
you'll see, at newlib build time:

/x/gccobj/./gcc/xgcc -B/x/gccobj/./gcc/ <many options elided> -c -o lib_a-aligned_alloc.o \
 `test -f 'aligned_alloc.c' || echo '/y/newlib/libc/stdlib/'`aligned_alloc.c
/y/newlib/libc/stdlib/aligned_alloc.c: In function 'aligned_alloc':
/y/newlib/libc/stdlib/aligned_alloc.c:35:10: warning: implicit declaration of function \
 '_memalign_r' [-Wimplicit-function-declaration]
   35 |   return _memalign_r (_REENT, align, size);
      |          ^~~~~~~~~~~
2021-02-18 02:05:47 +01:00
Hans-Peter Nilsson 571e730678 Complete revert of 2019-08-19, st_atime in libc/include/sys/stat.h
The revert-part of the revert-and-fix commit, b99887c428 a.k.a.
"Revert previous change to sys/stat.h and fix cris libgloss",
apparently intending to revert f75aa67851 a.k.a. "Fix regression in
cris-elf caused by sys/stat.h change" and fix it in another way,
wasn't complete.  Although the fix-part added the prerequisite "#undef
st_atime" (et al) to gensyscalls, the revert-part didn't revert the
"&& !defined(__cris__)" in sys/stat.h, stopping st_atime (et al) from
being defined.

The effect of the unreverted change is that accessing the struct stat
compatibility member names "st_atime" (et al) as in "struct stat
mystat; mystat.st_atime;" yields errors, observable for example when
building libgfortran in gcc:

/x/gcc/libgfortran/intrinsics/stat.c:114:42: error: 'struct stat' has \
no member named 'st_atime'; did you mean 'st_atim'?
  114 |       sarray->base_addr[8 * stride] = sb.st_atime;
      |                                          ^~~~~~~~
      |                                          st_atim
(etc.)

Trivially fixed by completing the reversion, removing the "&&
!defined(__cris__)" in sys/stat.h.

Beware: the net effect of the earlier related change to struct stat in
sys/stat.h, leading up to the fix, *does* change its definition as a
type.  Thankfully, replacing members like "time_t st_atime; long
st_spare1;" by "struct timespec st_atim;", ditto st_mtim and st_ctim,
is layout-compatible.  To wit, that change is "binary compatible".

Incidentally, related to the simulator / Linux ABI, there's a
transitional stage (see gensyscalls), reloading between "struct stat"
(sys/stat.h) and "struct new_stat" (kernel/simulator) as necessary.

Tested by a cris-elf gcc build (including libgfortran).
2021-02-16 13:57:11 +01:00
Eshan dhawan d8ee634506 FTW Port for Newlib
Signed-off-by: Eshan Dhawan <eshandhawan51@gmail.com>
2021-02-09 11:07:59 +01:00
Eshan dhawan 55a6e49a08 Removed Soft float from MIPS
This Patch removes Soft Float code from MIPS.
Instead It adds the soft float code from RISCV

The code came from FreeBSD and assumes the FreeBSD softfp
implementation not the one with GCC. That was an overlooked and
fixed in the other fenv code already.

Signed-off-by: Eshan Dhawan <eshandhawan51@gmail.com>
2021-02-05 10:32:16 +01:00
Sebastian Huber 3388a5a429 Align *utime*() with POSIX/glibc
Change the prototypes to be in line with POSIX/glibc.  This may fix
issues with new warnings produced by GCC 11.

Signed-off-by: Sebastian Huber <sebastian.huber@embedded-brains.de>
2021-01-26 17:27:35 +01:00
Sebastian Huber a485393aea RTEMS: Add <poll.h> and <sys/poll.h>
Add the POSIX header file <poll.h> which is used by the GCC 11 Ada
runtime support.

Signed-off-by: Sebastian Huber <sebastian.huber@embedded-brains.de>
2021-01-05 13:41:34 -05:00
Jeff Johnston 415fdd4279 Bump up newlib version to 4.1.0 2020-12-18 18:50:49 -05:00
Paul Zimmermann 4bb6581aa8 fixes to make compilation succeeds 2020-12-18 10:06:31 +01:00
Jeff Johnston b2f3d593ff Update gamma functions from code in picolibc
- fixes issue with inf sign when x is -0
2020-12-17 16:23:43 -05:00
Jeff Johnston d634f26653 Add declarations for __ieee754_tgamma functions to fdlibm.h 2020-12-16 15:28:09 -05:00
Sebastian Huber 6cc47c4c33 arm: Fix memchr() for Armv8-R
The Cortex-R52 processor is an Armv8-R processor with a NEON unit.  This
fix prevents conflicting architecture profiles A/R errors issued by the
linker.

Signed-off-by: Sebastian Huber <sebastian.huber@embedded-brains.de>
2020-12-14 16:10:30 -05:00
Fabian Schriever cf1ef2dc5b Fix error in powf for x close to 1 and large y
This patch fixes the error found by Paul Zimmermann (see
https://homepages.loria.fr/PZimmermann/papers/#accuracy) regarding x
close to 1 and rather large y (specifically he found the case
powf(0x1.ffffeep-1,-0x1.000002p+27) which returns +Inf instead of the
correct value). We found 2 more values for x which show the same faulty
behaviour, and all 3 are fixed with this patch. We have tested all
combinations for x in [+1.fffdfp-1, +1.00020p+0] and y in
[-1.000007p+27, -1.000002p+27] and [1.000002p+27,1.000007p+27].
2020-12-11 14:38:19 -05:00
Jeff Johnston 14123c991b Bump newlib release to 4.0.0 2020-12-11 14:37:12 -05:00
Kito Cheng 57635f8581 RISC-V: Add machine-specific implementation for lrint[f], lround[f], llrint[f] and llround[f]. 2020-11-18 09:35:28 +01:00
Kito Cheng 5cf5a2e4c0 RISC-V: Add machine-specific implementation for isnan[f] and copysign[f] 2020-11-18 09:35:28 +01:00
Kito Cheng a7f82939d8 RISC-V: Add missing compile rule for s_finite.c, sf_finite.c, s_isinf.c and sf_isinf.c 2020-11-18 09:35:28 +01:00
Corinna Vinschen aa106b29a6 malloc/nano-malloc: correctly check for out-of-bounds allocation reqs
The overflow check in mEMALIGn erroneously checks for INT_MAX,
albeit the input parameter is size_t.  Fix this to check for
__SIZE_MAX__ instead.  Also, it misses to check the req against
adding the alignment before calling mALLOc.

While at it, add out-of-bounds checks to pvALLOc, nano_memalign,
nano_valloc, and Cygwin's (unused) dlpvalloc.

Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
2020-11-17 10:52:34 +01:00
Sebastian Huber 14a1e7ce42 Fix return type of __locale_ctype_ptr_l()
This prevents warnings like this:

ctype.h:118:9: warning: return discards 'const' qualifier from pointer
  target type
2020-11-16 19:34:30 +01:00
Joel Sherrill 302b82afee libc/include/newlib.h: Fix C++ compilation issue 2020-11-16 08:15:18 -06:00
Ivan Grokhotov b7a357e92e Fix 32-bit integer overflow when calculating TZ rules 2020-11-04 13:33:36 -05:00
Kito Cheng ff2c8fcfc7 RISC-V: Fix wrong including file in s_isinf.c 2020-10-29 09:39:35 +01:00
Kito Cheng 0020d2dd7c RISC-V: NaN should return 0 for finite[f] 2020-10-29 09:39:35 +01:00
Joel Sherrill fcaaf40c9d libc/sys/rtems/include/machine/_types.h: Define daddr_t to be 64 bits for RTEMS
This type needs to be able to represent a position on a disk or
file system.
2020-10-28 09:45:21 -05:00
Kito Cheng b847c83294 RISC-V: Implment finite and fpclassify 2020-10-27 08:56:30 +01:00
Kito Cheng b5f03509d1 RISC-V: Add fabs[f], fmax[f] and fmin[f]. 2020-10-27 08:56:30 +01:00
dougm 17b7dfc0b5 Define RB_SET_PARENT to do all assignments
to rb parent pointers. Define RB_SWAP_CHILD to replace the child of a parent
with its twin, and use it in 4 places. Use RB_SET in rb_link_node to remove the
only linuxkpi reference to color, and then drop color- and parent-related
definitions that are defined and used only in rbtree.h.

This is intended to be entirely cosmetic, with no impact on program
behavior, and leave RB_PARENT and RB_SET_PARENT as the only ways to
read and write rb parent pointers.

Reviewed by:	markj, kib
Tested by:	pho
Differential Revision:	https://reviews.freebsd.org/D25264
2020-10-26 14:18:46 +01:00
dougm d03eaf36dc In concluding RB_REMOVE_COLOR, in the case when
the sibling of the root of the too-short tree is black and at least one of the
children of that sibling is red, either one or two rotations finish the
rebalancing. In the case when both of the children are red, the current
implementation uses two rotations where only one is necessary. This change
removes that extra rotation, and in that case also removes a needless
black-to-red-to-black recoloring.

Reviewed by:	markj
Differential Revision:	https://reviews.freebsd.org/D25335
2020-10-26 14:18:46 +01:00
dougm 977a827d29 Linuxkpi uses the rb-tree structures
without using their interfaces, making them break when the representation
changes. Revert changes that eliminated the color field from rb-trees, leaving
everything as it was before.

Reviewed by:	markj
Differential Revision:	https://reviews.freebsd.org/D25250
2020-10-26 14:18:46 +01:00
dougm 87b42171dc Fixup r361997 by balancing parens. Duh. 2020-10-26 14:18:46 +01:00
dougm e83aad1851 Restore an RB_COLOR macro, for the benefit of
a bit of DIAGNOSTIC code that depends on it.

Reported by:	rpokala, mjguzik
Reviewed by:	markj
Differential Revision:	https://reviews.freebsd.org/D25204
2020-10-26 14:18:46 +01:00
dougm 5b29be92e3 To reduce the size of an rb_node, drop the color
field. Set the least significant bit in the pointer to the node from its parent
to indicate that the node is red. Have the tree rotation macros leave the
old-parent/new-child node red and the new-parent/old-child node black.

This change makes RB_LEFT and RB_RIGHT no longer assignable, and
RB_COLOR no longer defined. Any code that modifies the tree or
examines a node color would have to be modified after this change.

Reviewed by:	markj
Tested by:	pho
Differential Revision:	https://reviews.freebsd.org/D25105
2020-10-26 14:18:46 +01:00
dougm 123df813ee Remove from RB_REMOVE_COLOR some null checks
where the pointer checked is provably never null. Restructure the surrounding
code just enough to make the non-nullness obvious.

Reviewed by:	markj
Tested by:	pho
Differential Revision:	https://reviews.freebsd.org/D25089
2020-10-26 14:18:46 +01:00
dougm 640a96a231 RB_REMOVE invokes RB_REMOVE_COLOR either when
child is red or child is null. In the first case, RB_REMOVE_COLOR just changes
the child to black and returns. With this change, RB_REMOVE handles that case,
and drops the child argument to RB_REMOVE_COLOR, since that value is always
null.

RB_REMOVE_COLOR is changed to remove a couple of unneeded tests, and
to eliminate some deep indentation.

RB_ISRED is defined to combine a null check with a test for redness,
to replace that combination in several places.

Reviewed by:	markj
Tested by:	pho
Differential Revision:	https://reviews.freebsd.org/D25032
2020-10-26 14:18:46 +01:00
dougm 9db2b54571 For the case when RB_REMOVE requires a nontrivial
search to find the node to replace the one being removed, restructure to first
remove the replacement node and correct the parent pointers around it, and then
let the all-cases code at the end deal with the parent of the deleted node,
making it point to the replacement node. This removes one or two conditional
branches.

Reviewed by:	markj
Tested by:	pho
Differential Revision:	https://reviews.freebsd.org/D24845
2020-10-26 14:18:46 +01:00
dougm 1256d090ad Correct the use of RB_AUGMENT in the RB_TREE
macros so that is invoked at the root of every subtree that changes in an
insert or delete, and only once, and ordered from the bottom of the tree to the
top. For intel_gas.c, the only user of RB_AUGMENT I can find, change the
augmenting routine so that it does not climb from entry to tree root on every
call, and remove a 'tree correcting' function that can be supplanted by proper
tree augmentation.

Reviewed by:	kib
Tested by:	pho
Differential Revision:	https://reviews.freebsd.org/D23189
2020-10-26 14:18:46 +01:00
trasz fd4cbaba7a Add RB_REINSERT(3), a low overhead alternative to
removing a node and reinserting it back with an updated key.

This is one of dependencies for the upcoming stats(3) code.

Reviewed by:	cem
Obtained from:	Netflix
MFC after:	2 weeks
Sponsored by:	Klara Inc, Netflix
Differential Revision:	https://reviews.freebsd.org/D21786
2020-10-26 14:18:46 +01:00
jah 303c61925d amd64: prevent KCSan false positives on LAPIC mapping
For configurations without x2APIC support (guests, older hardware), the global
LAPIC MMIO mapping will trigger false-positive KCSan reports as it will appear
that multiple CPUs are concurrently reading and writing the same address.
This isn't actually true, as the underlying physical access will be performed
on the local CPU's APIC. Additionally, because LAPIC access can happen during
event timer configuration, the resulting KCSan printf can produce a panic due
to attempted recursion on event timer resources.

Add a __nosanitizethread preprocessor define to prevent the compiler from
inserting TSan hooks, and apply it to the x86 LAPIC accessors.

PR:		249149
Reported by:	gbe
Reviewed by:	andrew, kib
Tested by:	gbe
Differential Revision:	https://reviews.freebsd.org/D26354
2020-10-26 14:18:46 +01:00
mjg 47efca5ac3 sys: clean up empty lines in .c and .h files 2020-10-26 14:18:46 +01:00
rlibby b9af5041bd gcc: quiet Wattribute for no_sanitize("address")
This is an unfortunate instance where the __has_attribute check does
not function usefully.  Gcc does have the attribute, but for gcc it only
applies to functions, not variables, and trying to apply it to a
variable generates Wattribute.  So far we only apply the attribute to
variables.  Only enable the attribute for clang, for now.

Reviewed by:	Anton Rang <rang at acm.org>
Sponsored by:	Dell EMC Isilon
Differential Revision:	https://reviews.freebsd.org/D22875
2020-10-26 14:18:46 +01:00
dab b9967c3f90 Don't sanitize linker_set
The assumptions of linker_set don't play nicely with
AddressSanitizer. AddressSanitizer adds a 'redzone' of zeros around
globals (including those in named sections), whereas linker_set
assumes they are all packed consecutively like a pointer array. So:
let's annotate linker_set so that AddressSanitizer ignores it.

Submitted by:	Matthew Bryan <matthew.bryan@isilon.com>
Reviewed by:	kib, rang_acm.org
Sponsored by:	Dell EMC Isilon
Differential Revision:	https://reviews.freebsd.org/D22239
2020-10-26 14:18:46 +01:00
jhb c25de3a3c5 Make the system C11 atomics headers fully compatible with external GCC.
The <sys/cdefs.h> and <stdatomic.h> headers already included support for
C11 atomics via intrinsincs in modern versions of GCC, but these versions
tried to "hide" atomic variables inside a wrapper structure.  This wrapper
is not compatible with GCC's internal <stdatomic.h> header, so that if
GCC's <stdatomic.h> was used together with <sys/cdefs.h>, use of C11
atomics would fail to compile.  Fix this by not hiding atomic variables
in a structure for modern versions of GCC.  The headers already avoid
using a wrapper structure on clang.

Note that this wrapper was only used if C11 was not enabled (e.g.
via -std=c99), so this also fixes compile failures if a modern version
of GCC was used with -std=c11 but with FreeBSD's <stdatomic.h> instead
of GCC's <stdatomic.h> and this change fixes that case as well.

Reported by:	Mark Millard
Reviewed by:	kib
Differential Revision:	https://reviews.freebsd.org/D16585
2020-10-26 14:18:45 +01:00
Torbjörn SVENSSON via Newlib 7ed952000c libc/time: Move internal newlib tz-structs into own header
As discussed in GCC bug 97088
(https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97088), parameters in
prototypes of library functions should use reserved names, or no name
at all.

This patch moves the internal struct __tzrule_struct to its own
internal header sys/_tz_structs.h.  This is included from newlib's
time code as well as from Cygwin's localtime wrapper.

Signed-off-by: Torbjörn SVENSSON <torbjorn.svensson@st.com>
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
2020-10-15 16:59:51 +02:00
Thomas Wolff 1ed2fe0f03 drop ambiguous-wide behaviour from Unicode CJK locales 2020-10-13 13:52:07 +02:00
Torbjörn SVENSSON ea275093c1 libc/include/wchar.h: Remove parameter name
As discussed in GCC bug 97088
(https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97088), parameters in
prototypes of library functions should use reserved names, or no name
at all.

This patch removes the 'ptr' parameter name from
wint_t _getwchar_r (struct _reent *);
wint_t _getwchar_unlocked_r (struct _reent *);

to avoid possible clashes with user code in case someone uses
before including Newlib's wchar.h (or uses some other conflicting
definition)

Signed-off-by: Torbjörn SVENSSON <torbjorn.svensson@st.com>
2020-10-02 17:02:28 -04:00
Torbjörn SVENSSON 615cf4bdce libc/include/inttypes.h: Remove parameter name
As discussed in GCC bug 97088
(https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97088), parameters in
prototypes of library functions should use reserved names, or no name
at all.

This patch removes the 'j' parameter name from
extern intmax_t  imaxabs(intmax_t);

to avoid possible clashes with user code in case someone uses
before including Newlib's inttypes.h (or uses some other conflicting
definition)

Signed-off-by: Torbjörn SVENSSON <torbjorn.svensson@st.com>
2020-10-02 17:00:43 -04:00
Christophe Lyon 4c49accf89 libc/include/math.h: Remove parameter name
As discussed in GCC bug 97088
(https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97088), parameters in
prototypes of library functions should use reserved names, or no name
at all.

This patch removes the 'x' parameter name from
extern int __isinff (float);
extern int __isinfd (double);
extern int __isnanf (float);
extern int __isnand (double);
extern int __fpclassifyf (float);
extern int __fpclassifyd (double);
extern int __signbitf (float);
extern int __signbitd (double);

to avoid possible clashes with user code in case someone uses
before including Newlib's math.h (or uses some other conflicting
definition)
2020-09-25 22:53:43 -04:00
Jojo R 8315a90822 Port of C-SKY for newlib
Contributor list:  

  - Lifang Xia <lifang_xia@c-sky.com>  
  - Jojo R <jiejie_rong@c-sky.com>
  - Xianmiao Qu <xianmiao_qu@c-sky.com>
  - Yunhai Shang <yunhai_shang@c-sky.com>
2020-09-23 15:08:59 -04:00
Keith Packard 4641693796 libm: Make tgamma(-small) = -INFINITY
Need to copy the argument sign to the output for tgamma(finite)
overflow case.

Signed-off-by: Keith Packard <keithp@keithp.com>
2020-09-18 17:20:27 -04:00
Keith Packard via Newlib 1f8e5847df libm: Fix 'gamma' and 'gammaf' functions. Clean up other gamma code. [v2]
The current gamma, gamma_r, gammaf and gammaf_r functions return
|gamma(x)| instead of ln(|gamma(x)|) due to a change made back in 2002
to the __ieee754_gamma_r implementation. This patch fixes that, making
all of these functions map too their lgamma equivalents.

To fix the underlying bug, the __ieee754_gamma functions have been
changed to return gamma(x), removing the _r variants as those are no
longer necessary. Their names have been changed to __ieee754_tgamma to
avoid potential confusion from users.

Now that the __ieee754_tgamma functions return the correctly signed
value, the tgamma functions have been modified to use them.

libm.a now exposes the following gamma functions:

    ln(|gamma(x)|):

	__ieee754_lgamma_r
	__ieee754_lgammaf_r

	lgamma
	lgamma_r
	gamma
	gamma_r

	lgammaf
	lgammaf_r
	gammaf
	gammaf_r

	lgammal	(on machines where long double is double)

    gamma(x):

	__ieee754_tgamma
	__ieee754_tgammaf
	tgamma
	tgammaf
	tgammal (on machines where long double is double)

Additional aliases for any of the above functions can be added if
necessary; in particular, I'm not sure if we need to include
__ieee754_gamma*_r functions (which would return ln(|(gamma(x)|).

Signed-off-by: Keith Packard <keithp@keithp.com>

----

v2:
	Switch commit message to ASCII
2020-09-04 21:27:11 +02:00
Keith Packard via Newlib a0d7982ff4 libm/riscv: Use common fma code when necessary
For RISC-V targets without hardware FMA support, include the
common fma implementation to provide that API.

Signed-off-by: Keith Packard <keithp@keithp.com>
2020-09-04 15:11:31 +02:00
Keith Packard via Newlib 373f628d04 libm/riscv: Fix machine-specific sqrt build process
Like ARM, some RISC-V implementations have hardware sqrt. Support for
that can be detected at compile time, which the code did. However, the
filenames were incorrect so that both the risc-v specific and general
code were getting included in the resulting library.

Fix this by following the ARM model and #include'ing the general code
when the architecture-specific support is not available.

Signed-off-by: Keith Packard <keithp@keithp.com>
2020-09-04 15:11:31 +02:00
Corinna Vinschen 12a94daf5f loadlocale: don't casecmp digits
strcmp is sufficient here

Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
2020-09-04 14:21:10 +02:00
Jozef Lawrynowicz 754386c7f5 Fix warnings when building for msp430-elf
The MSP430 target supports both 16-bit and 20-bit size_t and intptr_t.
Some implicit casts in Newlib expect these types to be
"long", (a 32-bit type on MSP430) which causes warnings during
compilation such as:
  "cast from pointer to integer of different size"
2020-09-03 12:55:32 +02:00
Keith Packard via Newlib a634adda5a libm/machine/arm: Rename s*_fma.c -> s*_fma_arm.c
This is required to avoid colliding with files built from libm/common
that would end up with the same object name.

When libm.a was constructed from the individual sub-libraries, the
contents of the libm/common files would be replaced by that from
libm/machine/arm with the same name.

Signed-off-by: Keith Packard <keithp@keithp.com>
2020-09-02 10:04:30 +02:00
Jon Turney ed1573fc17
doc: Also update shebang for chapter-texi2docbook.py 2020-08-26 16:12:52 +01:00
Eshan dhawan via Newlib 39f057e2aa Enabled _CS* defines for RTEMS
Signed-off-by: Eshan dhawan <eshandhawan51@gmail.com>
2020-08-25 20:54:33 +02:00
Jon Turney c2d6e6f7f6
doc: Various fixes to makedocbook for python3.8
Also update shebang to explicitly use python3, since python2 is EOL and
(per PEP 0394) 'python' may not exist at all.
2020-08-24 17:36:10 +01:00
Keith Packard via Newlib 8a7ec55c53 libm/stdlib: Realloc when shrinking by 2* or more
This reduces memory usage when reallocating objects much smaller.

Signed-off-by: Keith Packard <keithp@keithp.com>
2020-08-17 11:43:55 +02:00
Keith Packard via Newlib ce4044adee libm/stdlib: don't read past source in nano_realloc
Save the computed block size and use it to avoid reading past
the end of the source block.

Signed-off-by: Keith Packard <keithp@keithp.com>
2020-08-17 11:43:55 +02:00
Craig Blackmore ab215e3dd1 libc/stdlib: Fix build failure in nano_calloc
commit 588a5e1dde added a non-reentrant
call to nano_malloc which causes a build failure if INTERNAL_NEWLIB is
defined.

Here is a snippet of the error:

In file included from .../newlib/newlib/libc/stdlib/nano-mallocr.c:38:
.../newlib/newlib/libc/include/malloc.h:42:25: note: expected 'struct _reent *' but argument is of type 'ptrdiff_t' {aka 'int'}
   42 | extern void *_malloc_r (struct _reent *, size_t);
      |                         ^~~~~~~~~~~~~~~
.../newlib/newlib/libc/stdlib/nano-mallocr.c:67:22: error: too few arguments to function '_malloc_r'
   67 | #define nano_malloc  _malloc_r
      |                      ^~~~~~~~~
.../newlib/newlib/libc/stdlib/nano-mallocr.c:456:11: note: in expansion of macro 'nano_malloc'
  456 |     mem = nano_malloc(bytes);
      |           ^~~~~~~~~~~
In file included from .../newlib/newlib/libc/stdlib/nano-mallocr.c:38:
.../newlib/newlib/libc/include/malloc.h:42:14: note: declared here
   42 | extern void *_malloc_r (struct _reent *, size_t);
      |              ^~~~~~~~~
.../newlib/newlib/libc/stdlib/nano-mallocr.c:43: warning: "assert" redefined
   43 | #define assert(x) ((void)0)
      |

This patch adds a missing RCALL to the args when calling nano_malloc
from nano_calloc, so that if the call is reentrant, reent_ptr is passed
as the first argument.

The variable `bytes` (also added in 588a5e1d) has been changed from a
`ptrdiff_t` to `malloc_size_t` as it does not need to be signed. It is
used to store the product of two unsigned malloc_size_t variables and
then iff there was no overflow is it passed to malloc and memset which
both expect size_t which is unsigned.

Signed-off-by: Craig Blackmore <craig.blackmore@embecosm.com>
2020-08-13 09:59:45 +02:00
Keith Packard via Newlib 588a5e1dde libc/stdlib: Use __builtin_mul_overflow for reallocarray and calloc
This built-in function (available in both gcc and clang) is more
efficient and generates shorter code than open-coding the test.

Signed-off-by: Keith Packard <keithp@keithp.com>
2020-08-12 10:09:56 +02:00
Keith Packard via Newlib bafd65f2fb libm/machine/riscv: Add custom fma/sqrt functions when supported [v2]
Check for HW FMA and SQRT support and use those instructions in place
of software implementations.

Signed-off-by: Keith Packard <keithp@keithp.com>
2020-08-12 09:52:19 +02:00
Keith Packard via Newlib a44bc679a4 libm/machine/arm: Add optimized fmaf and fma when available
When HAVE_FAST_FMAF is set, use the vfma.f32 instruction, when
HAVE_FAST_FMA is set, use the vfma.f64 instruction.

Usually the compiler built-ins will already have inlined these
instructions, but provide these symbols for cases where that doesn't
work instead of falling back to the (inaccurate) common code versions.

Signed-off-by: Keith Packard <keithp@keithp.com>
2020-08-10 21:04:12 +02:00
Keith Packard via Newlib 0c1989070e libm: Detect fast fmaf support
Anything with fast FMA is assumed to have fast FMAF, along with
32-bit arms that advertise 32-bit FP support and __ARM_FEATURE_FMA

Signed-off-by: Keith Packard <keithp@keithp.com>
2020-08-10 21:01:46 +02:00
Keith Packard via Newlib 432b331c79 libm: ARM without HW double does not have fast FMA
32-bit ARM processors with HW float (but not HW double) may define
__ARM_FEATURE_FMA, but that only means they have fast FMA for 32-bit
floats.

Signed-off-by: Keith Packard <keithp@keithp.com>
2020-08-10 21:01:46 +02:00
Keith Packard via Newlib 73b02710ec libm/math: ensure that expf(-huge) sets FE_UNDERFLOW exception
It was calling __math_uflow(0) instead of __math_uflowf(0), which
resulted in no exception being set on machines with exception support
for float but not double.

Signed-off-by: Keith Packard <keithp@keithp.com>
2020-08-10 10:31:36 +02:00
Keith Packard via Newlib c3ce8405c1 libm: Control errno support with _IEEE_LIBM configuration parameter
This removes the run-time configuration of errno support present in
portions of the math library and unifies all of the compile-time errno
configuration under a single parameter so that the whole library
is consistent.

The run-time support provided by _LIB_VERSION is no longer present in
the public API, although it is still used internally to disable errno
setting in some functions. Now that it is a constant, the compiler should
remove that code when errno is not supported.

This removes s_lib_ver.c as _LIB_VERSION is no longer variable.

Signed-off-by: Keith Packard <keithp@keithp.com>
2020-08-05 22:23:02 +02:00
Keith Packard via Newlib e108d04432 libm/math: Don't modify __ieee754_pow return values in pow
The __ieee754 functions already return the right value in exception
cases, so don't modify those. Setting the library to _POSIX_/_IEEE_
mode now only affects whether errno is modified.

Signed-off-by: Keith Packard <keithp@keithp.com>
2020-08-05 22:16:31 +02:00
Keith Packard via Newlib 98a4f8de47 libm/math: Set errno to ERANGE for pow(0, -y)
POSIX says that the errno for pow(0, -y) should be ERANGE instead of
EDOM.

https://pubs.opengroup.org/onlinepubs/9699919799/functions/pow.html

Signed-off-by: Keith Packard <keithp@keithp.com>
2020-08-05 22:16:31 +02:00
Keith Packard via Newlib 2eafcc78df libm/math: Make yx functions set errno=ERANGE for x=0
The y0, y1 and yn functions need separate conditions when x is zero as
that returns ERANGE instead of EDOM.

Also stop adjusting the return value from the __ieee754_y* functions
as that is already correct and we were just breaking it.

Signed-off-by: Keith Packard <keithp@keithp.com>
2020-08-05 22:16:31 +02:00
Keith Packard via Newlib 905aa4c013 libm/math: set errno to ERANGE at gamma poles
For POSIX, gamma(i) (i non-positive integer) should set errno to
ERANGE instead of EDOM.

Signed-off-by: Keith Packard <keithp@keithp.com>
2020-08-05 22:16:31 +02:00
Keith Packard via Newlib 45efe659b8 libm: Set math_errhandling to match library and hardware [v2]
math_errhandling is specified to contain two bits of information:

 1. MATH_ERRNO     -- Set when the library sets errno
 2. MATH_ERREXCEPT -- Set when math operations report exceptions

MATH_ERRNO should match whether the original math code is compiled in
_IEEE_LIBM mode and the new math code has WANT_ERRNO == 1.

MATH_ERREXCEPT should match whether the underlying hardware has
exception support. This patch adds configurations of this value for
RISC-V, ARM, Aarch64, x86 and x86_64 when using HW float.

Signed-off-by: Keith Packard <keithp@keithp.com>
2020-08-04 19:30:45 +02:00
Keith Packard via Newlib bb166cfc3e libm/common: Set WANT_ERRNO based on _IEEE_LIBM value
_IEEE_LIBM is the configuration value which controls whether the
original libm functions modify errno. Use that in the new math code as
well so that the resulting library is internally consistent.

Signed-off-by: Keith Packard <keithp@keithp.com>
2020-08-04 19:30:45 +02:00
Keith Packard 12ad9a46df libm/math: Use __math_xflow in obsolete math code [v2]
C compilers may fold const values at compile time, so expressions
which try to elicit underflow/overflow by performing simple
arithemetic on suitable values will not generate the required
exceptions.

Work around this by replacing code which does these arithmetic
operations with calls to the existing __math_xflow functions that are
designed to do this correctly.

Signed-off-by: Keith Packard <keithp@keithp.com>

----

v2:
	libm/math: Pass sign to __math_xflow instead of muliplying result
2020-08-03 13:29:27 +02:00
Corinna Vinschen 5717262b8e select.h: update FD macros to latest FreeBSD, fix type conversion warning
Compiling

#include <sys/select.h>
void f(int X)
{
  fd_set set;
  FD_ZERO(&set);
  FD_SET(X,&set);
  FD_CLR(X+1,&set);
  (void)FD_ISSET(X+2,&set);
}

results in plenty of gcc warnings when compiled with
-Wconversion -Wsign-conversion:

  fds.c:7:2: warning: conversion to ‘long unsigned int’ from ‘int’ may
    FD_SET(X,&set);
    ^~~~~~
  [...]

The unsigned NFDBITS macro combined with the signed 1L constant
are causing lots of implicit signed/unsigned type conversions.

Fix this by updating the FD_* macro code to the latest from FreeBSD
and adding an (int) cast to _NFDBITS.

As a side-effect, this fixes the visibility of NFDBITS and
fds_bits (only if __BSD_VISIBLE).

This also eliminates the old, outdated fd_set workaround.

Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
2020-08-03 12:41:45 +02:00
Corinna Vinschen 3fbfcd11fb Cygwin: posix_spawn: add Cygwin-specific code fixing process synchronisation
Newlib's posix_spawn has been taken from FreeBSD.  The code relies on
BSD-specific behaviour of vfork, namely the fact that vfork blocks
the parent until the child exits or calls execve as well as the fact
that the child shares parent memory in non-COW mode.

This behaviour can't be emulated by Cygwin.  Cygwin's vfork is
equivalent to fork.  This is POSIX-compliant, but it's lacking BSD's
vfork ingrained synchronization of the parent to wait for the child
calling execve, or the chance to just write a variable and the parent
will see the result.

So this requires a Cygwin-specific solution.  The core function of
posix_spawn, called do_posix_spawn is now implemented twice, once using
the BSD method, and once for Cygwin using Windows synchronization under
the hood waiting for the child to call execve and signalling errors
upstream.  The Windows specifics are hidden inside Cygwin, so newlib
only calls internal Cygwin functions.

Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
2020-08-03 12:41:44 +02:00
Sebastian Huber ba283d8777 arm: Fix include to avoid undefined reference
ld: libm.a(lib_a-fesetenv.o): in function `fesetenv':
newlib/libm/machine/arm/fesetenv.c:38: undefined reference to `vmsr_fpscr'

Signed-off-by: Sebastian Huber <sebastian.huber@embedded-brains.de>
2020-07-29 16:24:13 +02:00
Eshan dhawan 3ca4325968 arm: Split fenv.c into multiple files
Use the already existing stub files if possible.  These files are
necessary to override the stub implementation with the machine-specific
implementation through the build system.

Reviewed-by: Sebastian Huber <sebastian.huber@embedded-brains.de>
Signed-off-by: Eshan dhawan <eshandhawan51@gmail.com>
2020-07-29 06:58:17 +02:00
Eshan dhawan b7a6e02dc6 arm: Fix fenv support
The previous fenv support for ARM used the soft-float implementation of
FreeBSD.  Newlib uses the one from libgcc by default.  They are not
compatible.  Having an GCC incompatible soft-float fenv support in
Newlib makes no sense.  A long-term solution could be to provide a
libgcc compatible soft-float support.  This likely requires changes in
the GCC configuration.  For now, provide a stub implementation for
soft-float multilibs similar to RISC-V.

Move implementation to one file and delete now unused files.  Hide
implementation details.  Remove function parameter names from header
file to avoid name conflicts.

Provide VFP support if __SOFTFP__ is not defined like glibc.

Reviewed-by: Sebastian Huber <sebastian.huber@embedded-brains.de>
Signed-off-by: Eshan dhawan <eshandhawan51@gmail.com>
2020-07-29 06:58:17 +02:00
PkmX via Newlib 123b806523 riscv: fix integer wraparound in memcpy
This patch fixes a bug in RISC-V's memcpy implementation where an
integer wraparound occurs when src + size < 8 * sizeof(long), causing
the word-sized copy loop to be incorrectly entered.

Signed-off-by: Chih-Mao Chen <cmchen@andestech.com>
2020-07-27 10:14:34 +02:00
Aschref Ben Thabet 0ee972d1b0 ctype.h: Fix unused variable warnings
If __HAVE_LOCALE_INFO__ is not defined, then the locale in the
locale-specific ctype functions is ignored.  In the previous
implementation this resulted in compiler warnings.  For example:

int main()
{
  locale_t locale;
  locale = duplocale(uselocale((locale_t)0));
  isspace_l('x', locale);
  return 0;
}

gcc -Wall main.c
main.c: In function 'main':
main.c:6:11: warning: variable 'locale' set but not used [-Wunused-but-set-variable]
    6 |  locale_t locale;
      |           ^~~~~~
2020-07-16 11:27:38 +02:00
Keith Packard via Newlib b21ad33e08 testsuite: Fix iconv tests to use new encoding config defines
_ICONV_CONVERTER -> ICONV_FROM_ENCODING. It's not perfect, as the
library can support different from/to encodings now, but at least in
the default configurations the tests now work.

Signed-off-by: Keith Packard <keithp@keithp.com>
2020-07-10 10:51:43 +02:00
Keith Packard via Newlib 24f3c61953 libc/iconv: find_alias was mis-computing remaining alias table length
This caused the strnstr to walk off the end of the alias array and
fetch invalid data. Instead of attempting to update 'len', just
re-compute it based on the table end pointer that is already known.

Signed-off-by: Keith Packard <keithp@keithp.com>
2020-07-10 10:51:43 +02:00
Keith Packard via Newlib 2c33d31fa8 libc/iconv: Remove unneeded pointer var for _iconv_aliases
The pointer value for the iconv alias data never changes, so get rid
of the pointer and make it an array instead.

Signed-off-by: Keith Packard <keithp@keithp.com>
2020-07-10 10:51:43 +02:00
Keith Packard via Newlib 6c772f4547 libc/iconv: Detect CES handler loading failure
Fix the code checking for character set loading failure so that
it checks the return value from the init function.

Signed-off-by: Keith Packard <keithp@keithp.com>
2020-07-10 10:51:43 +02:00
Eshan dhawan via Newlib 104caeb7b1 Removed #ifndef _ARM_PCS_VFP_ from sys/fenv.h for arm
Signed-off-by: Eshan dhawan <eshandhawan51@gmail.com>
2020-07-06 13:18:28 +02:00
Corinna Vinschen f095752167 libm: machine: Add missing sparc and mips configuration
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
2020-07-03 10:45:44 +02:00
Eshan dhawan via Newlib 65918715a0 mips fenv support
Signed-off-by: Eshan dhawan <eshandhawan51@gmail.com>
2020-07-03 10:41:45 +02:00
Eshan dhawan via Newlib 03bf9f431c SPARC fenv support
Signed-off-by: Eshan dhawan <eshandhawan51@gmail.com>
2020-07-03 10:41:45 +02:00
Eshan dhawan via Newlib fd5e27d362 fenv aarch64 support
Signed-off-by: Eshan dhawan <eshandhawan51@gmail.com>
2020-07-02 12:12:39 +02:00
Eshan dhawan via Newlib a97bdf100f fenv support arm
Signed-off-by: Eshan dhawan <eshandhawan51@gmail.com>
2020-06-09 21:13:17 -04:00
Jeff Johnston bc5087298d Regenerate libm/machine configuration files for powerpc 2020-06-09 20:59:04 -04:00
Eshan dhawan via Newlib e6ce6f1430 hard float support for PowerPC taken from FreeBSD
Signed-off-by: Eshan dhawan <eshandhawan51@gmail.com>
2020-06-03 11:17:47 +02:00
Szabolcs Nagy 0f785536f3 Reimplement aligned_alloc
The original implementation had multiple issues:

- Only worked when posix_memalign was available (Linux, RTEMS).
- Violated C11 link namespace rules by calling posix_memalign.
- Failed to set errno on error.

These can be fixed by essentially using the same implementation
for aligned_alloc as for memalign, i.e. simply calling _memalign_r
(which is always available and a "more reserved name" although
technically still not in the reserved link namespace, at least
code written in c cannot define a colliding symbol, newlib has
plenty such namespace issues so this is fine).

It is not clear what the right policy is when MALLOC_PROVIDED is set,
currently that does not cover aligned_alloc so it is kept that way.

Tested on aarch64-none-elf
2020-05-19 15:19:33 +02:00
Keith Packard via Newlib 6295d75913 newlib/libm/math: Make pow/powf return qnan for snan arg
The IEEE spec for pow only has special case for x**0 and 1**y when x/y
are quiet NaN. For signaling NaN, the general case applies and these functions
should signal the invalid exception and return a quiet NaN.

Signed-off-by: Keith Packard <keithp@keithp.com>
2020-03-26 12:21:33 +01:00
Keith Packard via Newlib 3439f3b0e9 newlib/libm/common: Don't re-convert float to bits in modf/modff
These functions shared a pattern of re-converting the argument to bits
when returning +/-0. Skip that as the initial conversion still has the
sign bit.

Signed-off-by: Keith Packard <keithp@keithp.com>
2020-03-26 12:21:33 +01:00
Keith Packard via Newlib 61cd34c1bf newlib/libm/common: Fix modf/modff returning snan
Recent GCC appears to elide multiplication by 1, which causes snan
parameters to be returned unchanged through *iptr. Use the existing
conversion of snan to qnan to also set the correct result in *iptr
instead.

Signed-off-by: Keith Packard <keithp@keithp.com>
2020-03-26 12:21:33 +01:00
Joseph S. Myers 5e24839658 Fix spurious underflow exceptions for Bessel functions for double(from glibc bug 14155)
This fix comes from glibc, from files which originated from
	the same place as the newlib files. Those files in glibc carry
	the same license as the newlib files.

Bug 14155 is spurious underflow exceptions from Bessel functions for
large arguments.  (The correct results for large x are roughly
constant * sin or cos (x + constant) / sqrt (x), so no underflow
exceptions should occur based on the final result.)

There are various places underflows may occur in the intermediate
calculations that cause the failures listed in that bug.  This patch
fixes problems for the double version where underflows occur in
calculating the intermediate functions P and Q (in particular, x**-12
gets computed while calculating Q).  Appropriate approximations are
used for P and Q for arguments at least 0x1p28 and above to avoid the
underflows.

For sufficiently large x - 0x1p129 and above - the code already has a
cut-off to avoid calculating P and Q at all, which means the
approximations -0.125 / x and 0.375 / x can't themselves cause
underflows calculating Q.  This cut-off is heuristically reasonable
for the point beyond which Q can be neglected (based on expecting
around 0x1p-64 to be the least absolute value of sin or cos for large
arguments representable in double).

The float versions use a cut-off 0x1p17, which is less heuristically
justifiable but should still only affect values near zeroes of the
Bessel functions where these implementations are intrinsically
inaccurate anyway (bugs 14469-14472), and should serve to avoid
underflows (the float underflow for jn in bug 14155 probably comes
from the recurrence to compute jn).  ldbl-96 uses 0x1p129, which may
not really be enough heuristically (0x1p143 or so might be safer - 143
= 64 + 79, number of mantissa bits plus total number of significant
bits in representation) but again should avoid underflows and only
affect values where the code is substantially inaccurate anyway.
ldbl-128 and ldbl-128ibm share a completely different implementation
with no such cut-off, which I propose to fix separately.

Signed-off-by: Keith Packard <keithp@keithp.com>
2020-03-26 12:21:33 +01:00
Fabian Schriever 6b0c1e7cc8 Fix hypotf missing mask in hi+lo decomposition
Add the missing mask for the decomposition of hi+lo which caused some
errors of 1-2 ULP.

This change is taken over from FreeBSD:
95436ce20d

Additionally I've removed some variable assignments which were never
read before being overwritten again in the next 2 lines.
2020-03-19 16:46:17 +01:00
Fabian Schriever 4ad9ba42fc Fix modf/f for NaN input
For NaN input the modf/f procedures should return NaN instead of zero
with the sign of the input.
2020-03-19 16:34:26 +01:00
Fabian Schriever 9e8da7bd21 Fix for k_tan.c specific inputs
This fix for k_tan.c is a copy from fdlibm version 5.3 (see also
http://www.netlib.org/fdlibm/readme), adjusted to use the macros
available in newlib (SET_LOW_WORD).

This fix reduces the ULP error of the value shown in the fdlibm readme
(tan(1.7765241907548024E+269)) to 0.45 (thereby reducing the error by
1).

This issue only happens for large numbers that get reduced by the range
reduction to a value smaller in magnitude than 2^-28, that is also
reduced an uneven number of times. This seems rather unlikely given that
one ULP is (much) larger than 2^-28 for the values that may cause an
issue.  Although given the sheer number of values a double can
represent, it is still possible that there are more affected values,
finding them however will be quite hard, if not impossible.

We also took a look at how another library (libm in FreeBSD) handles the
issue: In FreeBSD the complete if branch which checks for values smaller
than 2^-28 (or rather 2^-27, another change done by FreeBSD) is moved
out of the kernel function and into the external function. This means
that the value that gets checked for this condition is the unreduced
value. Therefore the input value which caused a problem in the
fdlibm/newlib kernel tan will run through the full polynomial, including
the careful calculation of -1/(x+r). So the difference is really whether
r or y is used. r = y + p with p being the result of the polynomial with
1/3*x^3 being the largest (and magnitude defining) value. With x being
<2^-27 we therefore know that p is smaller than y (y has to be at least
the size of the value of x last mantissa bit divided by 2, which is at
least x*2^-51 for doubles) by enough to warrant saying that r ~ y.  So
we can conclude that the general implementation of this special case is
the same, FreeBSD simply has a different philosophy on when to handle
especially small numbers.
2020-03-18 10:05:11 +01:00
Sebastian Huber b37a3388cc RTEMS: Include missing header and fix stub
Signed-off-by: Sebastian Huber <sebastian.huber@embedded-brains.de>
2020-03-13 13:51:20 -05:00
Fabian Schriever c56f53a2a0 Fix truncf for sNaN input
Make line 47 in sf_trunc.c reachable. While converting the double
precision function trunc to the single precision version truncf an error
was introduced into the special case. This special case is meant to
catch both NaNs and infinities, however qNaNs and infinities work just
fine with the simple return of x (line 51). The only error occurs for
sNaNs where the same sNaN is returned and no invalid exception is
raised.
2020-03-11 12:10:58 +01:00
Joel Sherrill 91a8d0c907 i386/fenv.c: Include fenv.c implementation shared with x86_64, not stub 2020-03-10 16:05:59 +01:00
Fabian Schriever 18b4e0e518 Fix error in fdim/f for infinities
The comparison c == FP_INFINITE causes the function to return +inf as it
expects x = +inf to always be larger than y. This shortcut causes
several issues as it also returns +inf for the following cases:
 - fdim(+inf, +inf), expected (as per C99): +0.0
 - fdim(-inf, any non NaN), expected: +0.0

I don't see a reason to keep the comparison as all the infinity cases
return the correct result using just the ternary operation.
2020-03-10 15:11:23 +01:00
Fabian Schriever a8a40ee575 Fix error in exp in magnitude [2e-32,2e-28]
While testing the exp function we noticed some errors at the specified
magnitude. Within this range the exp function returns the input value +1
as an output. We chose to run a test of 1m exponentially spaced values
in the ranges [-2^-27,-2^-32] and [2^-32,2^-27] which showed 7603 and
3912 results with an error of >=0.5 ULP (compared with MPFR in 128 bit)
with the highest being 0.56 ULP and 0.53 ULP.

It's easy to fix by changing the magnitude at which the input value +1
is returned from <2^-28 to <2^-32 and using the polynomial instead. This
reduces the number of results with an error of >=0.5 ULP to 485 and 479
in above tests, all of which are exactly 0.5 ULP.

As we were already checking on exp we also took a look at expf. For expf
the magnitude where the input value +1 is returned can be increased from
<2^-28 to <2^-23 without accuracy loss for a slight performance
improvement. To ensure this was the correct value we tested all values
in the ranges [-2^-17,-2^-28] and [2^-28,2^-17] (~92.3m values each).
2020-03-09 10:12:25 +01:00
Fabian Schriever d4bcecb3e9 Fix error in float trig. function range reduction
The single-precision trigonometric functions show rather high errors in
specific ranges starting at about 30000 radians. For example the sinf
procedure produces an error of 7626.55 ULP with the input
5.195880078125e+04 (0x474AF6CD) (compared with MPFR in 128bit
precision). For the test we used 100k values evenly spaced in the range
of [30k, 70k]. The issues are periodic at higher ranges.

This error was introduced when the double precision range reduction was
first converted to float. The shift by 8 bits always returns 0 as iq is
never higher than 255.

The fix reduces the error of the example above to 0.45 ULP, highest
error within the test set fell to 1.31 ULP, which is not perfect, but
still a significant improvement. Testing other previously erroneous
ranges no longer show particularly large accuracy errors.
2020-03-03 16:45:22 +01:00
Fabian Schriever cef36220f2 Fix error in powf for (-1.0, NaN) input
Prevent confusion between -1.0 and 1.0 in powf. The corresponding
similar error was previously fixed for pow (see commit bb25dd1b)
2020-03-02 16:46:03 +01:00
Richard Earnshaw f973a7d8be arm: Finish moving newlib to unified syntax for Thumb1
Most code in newlib already uses unified syntax, but just a couple of
laggards remain.  This patch removes these and means the the entire
code base has now been converted.
2020-03-02 13:33:11 +00:00
Joel Sherrill fbaa096772 x86_64/i386 fenv: Replace symlink with include fenv_stub.c
Having symlinks for these files led to an issue reported to the RTEMS
Project that showed up using some tar for native Windows to unpack the
newlib sources.  It creates symlinks in the tar file as copies of the
files the symlinks point to.  If the links appear in the tar file before
the source exists, it cannot copy the file.

The solution in this patch is to convert the files that are symbolic
links into simple files which include the file they were linked to.
This should be more portable and avoids the symbolinc link problem.
2020-02-25 16:42:19 +01:00
Joel Sherrill 7dac41db18 newlib/libc/include/devctl.h: Add extern "C" wrapper
Adding this was necessary to allow posix_devctl() from C++.
2020-02-20 09:45:39 +01:00
Thomas Wolff c8204b1069 Locale modifier "@cjksingle" to enforce single-width CJK width.
This option follows a proposal in the Terminals Working Group Specifications
(https://gitlab.freedesktop.org/terminal-wg/specifications/issues/9#note_406682).
It makes locale width consistent with the corresponding mintty feature.
2020-02-18 11:35:42 +01:00
Nicolas Brunie bb25dd1b0f pow: fix pow(-1.0, NaN)
I think I may have encountered a bug in the implementation of pow:
pow(-1.0, NaN) returns 1.0 when it should return NaN.
Because ix is used to check input vs 1.0 rather than hx, -1.0 is
mistaken for 1.0
2020-02-14 10:12:25 +01:00
Keith Packard ff24ce9193 Typo in license for newlib/libc/stdio/flags.c
Fix spelling:

	MERCHANT I BILITY -> MERCHANT A BILITY

Signed-off-by: Keith Packard <keithp@keithp.com>
2020-02-06 11:58:50 +01:00
Keith Packard 10058b98e7 Typo in license terms for newlib/libm/common/log2.c
The closing quotes were in the wrong place

Signed-off-by: Keith Packard <keithp@keithp.com>
2020-02-06 11:58:50 +01:00
Keith Packard 9042d0ce65 Use remove-advertising-clause script to edit BSD licenses
This edits licenses held by Berkeley and NetBSD, both of which
have removed the advertising requirement from their licenses.

Signed-off-by: Keith Packard <keithp@keithp.com>
2020-01-29 19:03:31 +01:00
Corinna Vinschen 2607f00423 Revert "newlib: fix fseek optimization with SEEK_CUR"
This reverts commit 59362c80e3.

This breaks gnulib's autoconf test for POSIX compatibility of
fflush/fseek.  After fflush/fseek, ftello and lseek are out of
sync, with lseek having the wrong offset.  This breaks backward
compatibility with Cygwin applications.

Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
2020-01-29 18:53:44 +01:00
Jeff Johnston 4e78f8ea16 Bump up newlib release to 3.3.0 2020-01-21 15:17:43 -05:00
Jeff Johnston 8b39f7406c Change the reent verify check option to document disabling it
- also change the handling of default_newlib_reent_check_verify to
  be the same as other default variables in configure.host
- regenerate newlib/configure
2020-01-21 15:12:34 -05:00
Jeff Johnston f5da56ab5c Default newlib_reent_check_verify to yes in configure.host 2020-01-21 14:55:25 -05:00
Keith Packard 5377a84776 riscv: Map between ieeefp.h exception bits and RISC-V FCSR bits
If we had architecture-specific exception bits, we could just set them
to match the processor, but instead ieeefp.h is shared by all targets
so we need to map between the public values and the register contents.

Signed-off-by: Keith Packard <keithp@keithp.com>
2020-01-21 10:28:35 +01:00
Keith Packard 8e74c7119f riscv: Add 'break' statements to fpsetround switch
This makes the fpsetround function actually do something rather than
just return -1 due to the default 'fall-through' behavior of the switch
statement.

Signed-off-by: Keith Packard <keithp@keithp.com>
2020-01-21 10:28:35 +01:00
Keith Packard 954504ea14 riscv: Use current pseudo-instructions to access the FCSR register
Use fscsr and frcsr to store and read the FCSR register instead of
fssr and frsr.

Signed-off-by: Keith Packard <keithp@keithp.com>
2020-01-21 10:28:35 +01:00
Jeff Johnston 1fdf871c9d Prevent more NULL ptr accesses due to Balloc out of memory
- fix gdtoa-gethex.c, ldtoa.c, and strtodg.c to use eBalloc
2020-01-09 15:18:14 -05:00
Jeff Johnston 1afb22a120 Bump up release to 3.2.0 for yearly snapshot 2020-01-02 14:56:24 -05:00
Jon Turney 7685c4dd6c
doc: add more details about adding documentation to HOWTO
Add a little more detail to the checklist for adding documentation
Also update the list of supported sections
2019-12-29 17:10:15 +00:00
Anthony Green b481c11e5a Optimize setjmp/longjmp for moxie.
We don't need to save/restore every register -- just those
we don't expect to be trashed by function calls.
2019-12-20 09:00:26 -05:00
Keith Packard 76dcfd0c4d Don't display trailing '.' in _dcvt
In the two helper functions that _dcvt calls for 'f' and 'e' mode, if
there are no digits to display after the decimal point, don't add one.

Signed-off-by: Keith Packard <keithp@keithp.com>
2019-12-18 20:53:36 +01:00
Keith Packard 11f99384d2 Fix gcvt to always show 'ndigits' of precision
Leading zeros after the decimal point should not count
towards the 'ndigits' limit.

This makes gcvt match glibc and the posix gcvt man page.

Signed-off-by: Keith Packard <keithp@keithp.com>
2019-12-18 20:53:36 +01:00
Keith Packard abcc586ffe Fix fcvt to only show 'ndigit' past decimal
Even if the number is really small and this means showing *no* digits.
This makes newlib match glibc, and the fcvt posix man page.

Signed-off-by: Keith Packard <keithp@keithp.com>
2019-12-18 20:53:36 +01:00
Jon Turney 91f1eab9a9
doc: Untabify python scripts used for making man pages
These scripts fail with a TabError exception if 'python' is python3, as
mixing tabs and spaces in indentation is forbidden in python3.
2019-12-18 13:35:35 +00:00
Keith Packard ed2a469cdd Set __IEEE_LITTLE_ENDIAN for _XTENSA_EL__ (ESP32)
Signed-off-by: Keith Packard <keithp@keithp.com>
2019-12-17 10:09:36 +01:00
Keith Packard 2635b580ec Return EINVAL for illegal base in strtol
Signed-off-by: Keith Packard <keithp@keithp.com>
2019-12-17 10:07:44 +01:00
Bruno Haible c81a76b3b9 strtold: set errno to ERANGE on underflow per POSIX
https://pubs.opengroup.org/onlinepubs/9699919799/functions/strtod.html
2019-12-16 15:18:52 +01:00
Anthony Green 31227ba53d Fix setjmp/longjmp for the moxie port.
These functions needs to save and restore the stack frame, because
that's where the return address is stored.
2019-12-13 13:08:06 -05:00
Keith Packard 7a526cdc28 libm: switch sf_log1p from double error routines to float
sf_log1p was using __math_divzero and __math_invalid, which
drag in a pile of double-precision code. Switch to using the
single-precision variants. This also required making those
available in __OBSOLETE_MATH mode.

Signed-off-by: Keith Packard <keithp@keithp.com>
2019-12-02 10:00:32 +01:00
Brian Inglis c63c29e76e newlib/libc/include/sys/features.h: update __STDC_ISO_10646__
newlib wide char conversion functions were updated to
Unicode 11 on 2019-01-12
update standard symbol __STDC_ISO_10646__ to
Unicode 11 release date 2018-06-05 for Cygwin
2019-11-26 18:34:39 +01:00
Bastien Bouclet 59362c80e3 newlib: fix fseek optimization with SEEK_CUR
The call to fflush was invalidating the read buffer, preventing relative
seeks to positions that would have been inside the read buffer from
being optimized. The call to srefill would then re-read mostly the same
data that was initially in the read buffer.
2019-11-18 11:02:52 +01:00
Kwok Cheung Yeung d14714c690 Stash reent marker in upper bits of s1 on AMD GCN
s[0:3] contain a descriptor used to set up the initial value of the
stack, but only the lower 48 bits of s[0:1] are currently used.
The reent marker is currently set in s3, but by stashing it in the
upper 16 bits of s[0:1] instead, s3 can be freed up for other purposes.
2019-11-08 10:34:28 +01:00
Sebastian Huber 4082e91b59 Move timeval macros to <sys/time.h>
In FreeBSD, NetBSD, and OpenBSD these macros are defined in
<sys/time.h>.
2019-11-04 07:03:15 +01:00
Sebastian Huber aae831b083 Synchronize <sys/time.h> with FreeBSD
This change is based on the FreeBSD commit:

Author: asomers <asomers@FreeBSD.org>
Date:   Mon Jul 30 15:46:40 2018 +0000

    Make timespecadd(3) and friends public

    The timespecadd(3) family of macros were imported from NetBSD back in
    r35029. However, they were initially guarded by #ifdef _KERNEL. In the
    meantime, we have grown at least 28 syscalls that use timespecs in some
    way, leading many programs both inside and outside of the base system to
    redefine those macros. It's better just to make the definitions public.

    Our kernel currently defines two-argument versions of timespecadd and
    timespecsub.  NetBSD, OpenBSD, and FreeDesktop.org's libbsd, however, define
    three-argument versions.  Solaris also defines a three-argument version, but
    only in its kernel.  This revision changes our definition to match the
    common three-argument version.

    Bump _FreeBSD_version due to the breaking KPI change.

    Discussed with: cem, jilles, ian, bde
    Differential Revision:  https://reviews.freebsd.org/D14725
2019-11-04 07:03:15 +01:00
Sebastian Huber 4b3f69e4ac Synchronize <sys/_timespec.h> with FreeBSD 2019-11-04 07:03:15 +01:00
imp 7346e14d44 Fix sbttons for values > 2s
Add test against negative times. Add code to cope with larger values
properly.

Discussed with: bde@ (quite some time ago, for an earlier version)
2019-11-04 07:03:15 +01:00
Dimitar Dimitrov a1f617466d PRU: Align libmath to PRU ABI
The TI proprietary toolchain uses nonstandard names for some math
library functions. In order to achieve ABI compatibility between
GNU and TI toolchains, add support for the TI function names.

Signed-off-by: Dimitar Dimitrov <dimitar@dinux.eu>
2019-10-31 15:02:33 -04:00
Jeff Johnston 0764a2eab8 Fix some generated files 2019-10-31 14:52:04 -04:00
Dimitar Dimitrov 0c7734673a Initial PRU port for libgloss and newlib
Signed-off-by: Dimitar Dimitrov <dimitar@dinux.eu>
2019-10-31 14:47:19 -04:00
Joel Sherrill 9e06ba1ac3 riscv/sys/fenv.h: Add missing extern for fe_dfl_env_p 2019-10-09 11:00:45 -05:00
Jeff Johnston cfc4955234 Add patch from Joel Sherrill for i386 and x86_64 fenv support 2019-10-08 16:59:04 -04:00
Jeff Johnston e06f2fbde7 Allow verifying _REENT_CHECK macros memory allocation
- change sys/reent.h to replace _REENT_CHECK_DEBUG with
  _REENT_CHECK_VERIFY which when set asserts that any memory
  allocated is non-NULL and calls __assert_func directly
- add new --enable-newlib-reent-check-verify configure option
- add support for configure.host to specify default for
  newlib_reent_check_verify
- add _REENT_CHECK_VERIFY macro support to acconfig.h and newlib.hin
2019-10-07 15:36:03 -04:00
Christos Gentsos 175b215e05 Optimize epilogue sequence for architectures with POP interworking.
ARMv5 and above supports arm/thumb interworking using POP, so we can
improve the exit sequence in this case.
2019-10-07 14:38:14 +01:00
Jeff Johnston f88aece242 Prevent NULL ptr accesses due to Balloc out of memory
- add new eBalloc macro to mprec.h which calls Balloc and
  aborts if Balloc fails due to out of memory
- change mprec.c functions that use Balloc without checking to use eBalloc instead
- fix dtoa.c to use eBalloc
2019-10-04 17:43:49 -04:00
kib 7e9b1550fd Add SIOCGIFDOWNREASON.
The ioctl(2) is intended to provide more details about the cause of
the down for the link.

Eventually we might define a comprehensive list of codes for the
situations.  But interface also allows the driver to provide free-form
null-terminated ASCII string to provide arbitrary non-formalized
information.  Sample implementation exists for mlx5(4), where the
string is fetched from firmware controlling the port.

Reviewed by:	hselasky, rrs
Sponsored by:	Mellanox Technologies
MFC after:	1 week
Differential revision:	https://reviews.freebsd.org/D21527
2019-09-25 09:01:28 +02:00
jhb 1b35636119 Add kernel-side support for in-kernel TLS.
KTLS adds support for in-kernel framing and encryption of Transport
Layer Security (1.0-1.2) data on TCP sockets.  KTLS only supports
offload of TLS for transmitted data.  Key negotation must still be
performed in userland.  Once completed, transmit session keys for a
connection are provided to the kernel via a new TCP_TXTLS_ENABLE
socket option.  All subsequent data transmitted on the socket is
placed into TLS frames and encrypted using the supplied keys.

Any data written to a KTLS-enabled socket via write(2), aio_write(2),
or sendfile(2) is assumed to be application data and is encoded in TLS
frames with an application data type.  Individual records can be sent
with a custom type (e.g. handshake messages) via sendmsg(2) with a new
control message (TLS_SET_RECORD_TYPE) specifying the record type.

At present, rekeying is not supported though the in-kernel framework
should support rekeying.

KTLS makes use of the recently added unmapped mbufs to store TLS
frames in the socket buffer.  Each TLS frame is described by a single
ext_pgs mbuf.  The ext_pgs structure contains the header of the TLS
record (and trailer for encrypted records) as well as references to
the associated TLS session.

KTLS supports two primary methods of encrypting TLS frames: software
TLS and ifnet TLS.

Software TLS marks mbufs holding socket data as not ready via
M_NOTREADY similar to sendfile(2) when TLS framing information is
added to an unmapped mbuf in ktls_frame().  ktls_enqueue() is then
called to schedule TLS frames for encryption.  In the case of
sendfile_iodone() calls ktls_enqueue() instead of pru_ready() leaving
the mbufs marked M_NOTREADY until encryption is completed.  For other
writes (vn_sendfile when pages are available, write(2), etc.), the
PRUS_NOTREADY is set when invoking pru_send() along with invoking
ktls_enqueue().

A pool of worker threads (the "KTLS" kernel process) encrypts TLS
frames queued via ktls_enqueue().  Each TLS frame is temporarily
mapped using the direct map and passed to a software encryption
backend to perform the actual encryption.

(Note: The use of PHYS_TO_DMAP could be replaced with sf_bufs if
someone wished to make this work on architectures without a direct
map.)

KTLS supports pluggable software encryption backends.  Internally,
Netflix uses proprietary pure-software backends.  This commit includes
a simple backend in a new ktls_ocf.ko module that uses the kernel's
OpenCrypto framework to provide AES-GCM encryption of TLS frames.  As
a result, software TLS is now a bit of a misnomer as it can make use
of hardware crypto accelerators.

Once software encryption has finished, the TLS frame mbufs are marked
ready via pru_ready().  At this point, the encrypted data appears as
regular payload to the TCP stack stored in unmapped mbufs.

ifnet TLS permits a NIC to offload the TLS encryption and TCP
segmentation.  In this mode, a new send tag type (IF_SND_TAG_TYPE_TLS)
is allocated on the interface a socket is routed over and associated
with a TLS session.  TLS records for a TLS session using ifnet TLS are
not marked M_NOTREADY but are passed down the stack unencrypted.  The
ip_output_send() and ip6_output_send() helper functions that apply
send tags to outbound IP packets verify that the send tag of the TLS
record matches the outbound interface.  If so, the packet is tagged
with the TLS send tag and sent to the interface.  The NIC device
driver must recognize packets with the TLS send tag and schedule them
for TLS encryption and TCP segmentation.  If the the outbound
interface does not match the interface in the TLS send tag, the packet
is dropped.  In addition, a task is scheduled to refresh the TLS send
tag for the TLS session.  If a new TLS send tag cannot be allocated,
the connection is dropped.  If a new TLS send tag is allocated,
however, subsequent packets will be tagged with the correct TLS send
tag.  (This latter case has been tested by configuring both ports of a
Chelsio T6 in a lagg and failing over from one port to another.  As
the connections migrated to the new port, new TLS send tags were
allocated for the new port and connections resumed without being
dropped.)

ifnet TLS can be enabled and disabled on supported network interfaces
via new '[-]txtls[46]' options to ifconfig(8).  ifnet TLS is supported
across both vlan devices and lagg interfaces using failover, lacp with
flowid enabled, or lacp with flowid enabled.

Applications may request the current KTLS mode of a connection via a
new TCP_TXTLS_MODE socket option.  They can also use this socket
option to toggle between software and ifnet TLS modes.

In addition, a testing tool is available in tools/tools/switch_tls.
This is modeled on tcpdrop and uses similar syntax.  However, instead
of dropping connections, -s is used to force KTLS connections to
switch to software TLS and -i is used to switch to ifnet TLS.

Various sysctls and counters are available under the kern.ipc.tls
sysctl node.  The kern.ipc.tls.enable node must be set to true to
enable KTLS (it is off by default).  The use of unmapped mbufs must
also be enabled via kern.ipc.mb_use_ext_pgs to enable KTLS.

KTLS is enabled via the KERN_TLS kernel option.

This patch is the culmination of years of work by several folks
including Scott Long and Randall Stewart for the original design and
implementation; Drew Gallatin for several optimizations including the
use of ext_pgs mbufs, the M_NOTREADY mechanism for TLS records
awaiting software encryption, and pluggable software crypto backends;
and John Baldwin for modifications to support hardware TLS offload.

Reviewed by:	gallatin, hselasky, rrs
Obtained from:	Netflix
Sponsored by:	Netflix, Chelsio Communications
Differential Revision:	https://reviews.freebsd.org/D21277
2019-09-25 09:01:23 +02:00
thj 28a44b1ecd Rename IPPROTO 33 from SEP to DCCP
IPPROTO 33 is DCCP in the IANA Registry:
https://www.iana.org/assignments/protocol-numbers/protocol-numbers.xhtml

IPPROTO_SEP was added about 20 years ago in r33804. The entries were added
straight from RFC1700, without regard to whether they were used.

The reference in RFC1700 for SEP is '[JC120] <mystery contact>', this is an
indication that the protocol number was probably in use in a private network.

As RFC1700 is no longer the authoritative list of internet numbers and that
IANA assinged 33 to DCCP in RFC4340, change the header to the actual
authoritative source.

Reviewed by:	Richard Scheffenegger, bz
Approved by:	bz (mentor)
MFC after:	1 week
Differential Revision:	https://reviews.freebsd.org/D21178
2019-09-25 09:01:19 +02:00
rrs 693ba4025f This commit updates rack to what is basically
being used at NF as well as sets in some of the groundwork for
committing BBR. The hpts system is updated as well as some other needed
utilities for the entrance of BBR. This is actually part 1 of 3 more
needed commits which will finally complete with BBRv1 being added as a
new tcp stack.

Sponsored by:	Netflix Inc.
Differential Revision:	https://reviews.freebsd.org/D20834
2019-09-25 09:01:19 +02:00
jhb 2f55e1fa06 Add an external mbuf buffer type that holds
multiple unmapped pages.

Unmapped mbufs allow sendfile to carry multiple pages of data in a
single mbuf, without mapping those pages.  It is a requirement for
Netflix's in-kernel TLS, and provides a 5-10% CPU savings on heavy web
serving workloads when used by sendfile, due to effectively
compressing socket buffers by an order of magnitude, and hence
reducing cache misses.

For this new external mbuf buffer type (EXT_PGS), the ext_buf pointer
now points to a struct mbuf_ext_pgs structure instead of a data
buffer.  This structure contains an array of physical addresses (this
reduces cache misses compared to an earlier version that stored an
array of vm_page_t pointers).  It also stores additional fields needed
for in-kernel TLS such as the TLS header and trailer data that are
currently unused.  To more easily detect these mbufs, the M_NOMAP flag
is set in m_flags in addition to M_EXT.

Various functions like m_copydata() have been updated to safely access
packet contents (using uiomove_fromphys()), to make things like BPF
safe.

NIC drivers advertise support for unmapped mbufs on transmit via a new
IFCAP_NOMAP capability.  This capability can be toggled via the new
'nomap' and '-nomap' ifconfig(8) commands.  For NIC drivers that only
transmit packet contents via DMA and use bus_dma, adding the
capability to if_capabilities and if_capenable should be all that is
required.

If a NIC does not support unmapped mbufs, they are converted to a
chain of mapped mbufs (using sf_bufs to provide the mapping) in
ip_output or ip6_output.  If an unmapped mbuf requires software
checksums, it is also converted to a chain of mapped mbufs before
computing the checksum.

Submitted by:	gallatin (earlier version)
Reviewed by:	gallatin, hselasky, rrs
Discussed with:	ae, kp (firewalls)
Relnotes:	yes
Sponsored by:	Netflix
Differential Revision:	https://reviews.freebsd.org/D20616
2019-09-25 09:01:19 +02:00
hselasky d41e144869 Convert all IPv4 and IPv6 multicast memberships
into using a STAILQ instead of a linear array.

The multicast memberships for the inpcb structure are protected by a
non-sleepable lock, INP_WLOCK(), which needs to be dropped when
calling the underlying possibly sleeping if_ioctl() method. When using
a linear array to keep track of multicast memberships, the computed
memory location of the multicast filter may suddenly change, due to
concurrent insertion or removal of elements in the linear array. This
in turn leads to various invalid memory access issues and kernel
panics.

To avoid this problem, put all multicast memberships on a STAILQ based
list. Then the memory location of the IPv4 and IPv6 multicast filters
become fixed during their lifetime and use after free and memory leak
issues are easier to track, for example by: vmstat -m | grep multi

All list manipulation has been factored into inline functions
including some macros, to easily allow for a future hash-list
implementation, if needed.

This patch has been tested by pho@ .

Differential Revision: https://reviews.freebsd.org/D20080
Reviewed by:	markj @
MFC after:	1 week
Sponsored by:	Mellanox Technologies
2019-09-25 09:01:15 +02:00
brooks e94d2a0f8b Extend mmap/mprotect API to specify the max page
protections.

A new macro PROT_MAX() alters a protection value so it can be OR'd with
a regular protection value to specify the maximum permissions.  If
present, these flags specify the maximum permissions.

While these flags are non-portable, they can be used in portable code
with simple ifdefs to expand PROT_MAX() to 0.

This change allows (e.g.) a region that must be writable during run-time
linking or JIT code generation to be made permanently read+execute after
writes are complete.  This complements W^X protections allowing more
precise control by the programmer.

This change alters mprotect argument checking and returns an error when
unhandled protection flags are set.  This differs from POSIX (in that
POSIX only specifies an error), but is the documented behavior on Linux
and more closely matches historical mmap behavior.

In addition to explicit setting of the maximum permissions, an
experimental sysctl vm.imply_prot_max causes mmap to assume that the
initial permissions requested should be the maximum when the sysctl is
set to 1.  PROT_NONE mappings are excluded from this for compatibility
with rtld and other consumers that use such mappings to reserve
address space before mapping contents into part of the reservation.  A
final version this is expected to provide per-binary and per-process
opt-in/out options and this sysctl will go away in its current form.
As such it is undocumented.

Reviewed by:	emaste, kib (prior version), markj
Additional suggestions from:	alc
Obtained from:	CheriBSD
Sponsored by:	DARPA, AFRL
Differential Revision:	https://reviews.freebsd.org/D18880
2019-09-25 09:01:10 +02:00
shurd 17baf5e390 Some devices take undesired actions when RTS and
DTR are asserted. Some development boards for example will reset on DTR,
and some radio interfaces will transmit on RTS.

This patch allows "stty -f /dev/ttyu9.init -rtsdtr" to prevent
RTS and DTR from being asserted on open(), allowing these devices
to be used without problems.

Reviewed by:    imp
Differential Revision:  https://reviews.freebsd.org/D20031
2019-09-25 09:01:07 +02:00
pfg 6bd0b9ed27 Fix mismatch from r342379. 2019-09-25 09:01:04 +02:00
pfg 84ba60e6eb gai_strerror() - Update string error messages according to RFC 3493.
Error messages in gai_strerror(3) vary largely among OSs.

For new software we largely replaced the obsoleted EAI_NONAME and
with EAI_NODATA but we never updated the corresponding message to better
match the intended use. We also have references to ai_flags and ai_family
which are not very descriptive for non-developer end users.

Bring new new error messages based on informational RFC 3493, which has
obsoleted RFC 2553, and make them consistent among the header adn
manpage.

MFC after:	1 month
Differentical Revision:	D18630
2019-09-25 08:38:27 +02:00
Joel Sherrill 9786b05595 libc/include/devctl.h: Add SOCKCLOSE per FACE Technical Standard, Edition 3.0
The FACE Technical Standard, Edition 3.0 and later require the
	definition of the subcommand SOCKCLOSE in <devctl.h>.
	Reference: https://www.opengroup.org/face
2019-09-10 10:49:11 -05:00
Joel Sherrill 1082cd8ea2 fe_dfl_env.c: Fix typo in comment 2019-09-03 09:53:38 -05:00
Joel Sherrill c711371384 riscv/include/fenv.h: Use shared fenv.h.
libc/include/fenv.h was a direct copy of this file.
2019-09-03 09:52:34 -05:00
Jeff Johnston b99887c428 Revert previous change to sys/stat.h and fix cris libgloss
- revert previous fix which altered sys/stat.h
- fix libgloss/cris/gensyscalls to undef st_atime, st_mtime,
  and st_ctime macros which cannot be used with new_stat structure
2019-08-19 18:01:45 -04:00
Jeff Johnston f75aa67851 Fix regression in cris-elf caused by sys/stat.h change 2019-08-19 17:46:51 -04:00
Corinna Vinschen 72ff9acad2 stat.h: use POSIX-required timefields throughout
...except in certain SysV R4 cases for backward compat.
This is probably not required anymore, but it doesn't hurt
to keep it in.
2019-08-16 10:52:43 +02:00
Joel Sherrill 91172ce591 fenv: Include documentation in generated .info file 2019-08-15 12:04:50 +02:00
Giacomo Tesio 6aaaa2e768 memmem.c and strstr.c: do not require -std=c99 2019-08-14 10:39:37 +02:00
Jon Turney 8922b85d6b
fenv: Update makedocbook for eae68bfc
Teach makedocbook how to handle some new things seen in the makedoc markup
since eae68bfc:
- 'link with' lines appearing in SYNOPSIS sections

Also, don't raise a NoneType exception when there's something we don't
know how to handle in a SYNOPSIS section, just exit.
2019-08-13 12:29:31 +01:00
Jon Turney b2990cae9e
fenv: Fix typo-ed variable name in documentation 2019-08-13 12:29:30 +01:00
Jon Turney 5624c18785
fenv: Fix mangled makedoc markup
See makedoc.c:657:
Variables are marked up as '<[foo]>'.
Code is marked up as '<<foo>>'.
2019-08-13 12:29:30 +01:00
Jon Turney be095dde8a
fenv: fe_dfl_env.c doesn't contain any documentation
fe_dfl_env.c doesn't contain any documentation, so drop it from makedoc
processing.
2019-08-13 12:29:29 +01:00
Corinna Vinschen 8ef2461000 sched.h: Declare affinity functions only on targets supporting them 2019-08-12 17:30:20 +02:00
Joel Sherrill 744b90c996 Regenerated files from fenv.h addition 2019-08-09 17:49:16 +02:00
Joel Sherrill eae68bfc87 Add default implementation of fenv.h and all methods
The default implementation of the fenv.h methods return
	-EOPNOTSUP. Some of these have implementations appropriate
        for soft-float.

	The intention of the new fenv.h is that it be portable
	and that architectures provide their own implementation
	of sys/fenv.h.
2019-08-09 17:49:16 +02:00
Joel Sherrill 03f802846f Miscellaneous Makefile.in regenerated 2019-08-09 17:49:16 +02:00
Alexander Fedotov bf56973edc Align libgloss/arm and libc/sys/arm sources: miscellaneous fixes
1. Trim trailing spaces
2. Align comments, function declarations and definitions
2019-08-05 13:00:53 +01:00
Alexander Fedotov bd5596f4fd Align libgloss/arm and libc/sys/arm sources: Lite exit support
Applied changes from commit 2404223:

	* arm/crt0.S (_mainCRTStartup): Weak reference to atexit and _fini
		when lite exit is enabled.
2019-08-05 13:00:53 +01:00
Alexander Fedotov dfffe68303 Align libgloss/arm and libc/sys/arm sources: HeapInfo and __heap_limit
Applied changes from commit 8d98f95:

	* arm/crt0.S: Initialise __heap_limit when ARM_RDI_MONITOR is defined.
	* arm/syscalls.c: define __heap_limit global symbol.
	* arm/syscalls.c (_sbrk): Honour __heap_limit.

Applied changes from commit 8d98f95:
	Fixed semihosting for ARM when heapinfo not provided by debugger
2019-08-05 13:00:53 +01:00