The main memory region of the GDB simulator ends at address 0xFFBF,
but the simulator linker scripts do not make full use of this available
memory.
>From 61f3d212741acee583e21ff2c2808775584ecad6 Mon Sep 17 00:00:00 2001
From: Jozef Lawrynowicz <jozef.l@mittosystems.com>
Date: Mon, 3 Aug 2020 19:38:23 +0100
Subject: [PATCH 2/2] MSP430: Increase the amount of main memory available in
sim ld scripts
The main memory region of the GDB simulator ends at address 0xFFBF,
but the simulator linker scripts do not make full use of this available
memory.
__{preinit,init,fini}_array_start symbols must be word aligned in
linker scripts. If the section preceding the __*_array_start symbol
has an odd size, then a NULL byte will be present between the start
symbol and the .*_array section itself, when the section gets
automatically word-aligned.
This results in a branch to an invalid address when the CRT startup
code tries to run through the functions listed in the array sections.
>From de115144d05ecbaa82c9c737cc261715ca4b7d67 Mon Sep 17 00:00:00 2001
From: Jozef Lawrynowicz <jozef.l@mittosystems.com>
Date: Mon, 3 Aug 2020 19:09:46 +0100
Subject: [PATCH 1/2] MSP430: Word align __*_array_start symbols in sim linker
scripts
__{preinit,init,fini}_array_start symbols must be word aligned in
linker scripts. If the section preceding the __*_array_start symbol
has an odd size, then a NULL byte will be present between the start
symbol and the .*_array section itself, when the section gets
automatically word-aligned.
This results in a branch to an invalid address when the CRT startup
code tries to run through the functions listed in the array sections.
In the initial code I missed one level of pointer indirection. Instead
of storing errno in impure_data, _impure_ptr was corrupted.
Only simulator is impacted. Real targets have no OS and no syscalls.
This resolves a bunch of stdio cases from the GCC testsuite:
FAIL->PASS: gcc.c-torture/execute/printf-2.c -O0 execution test
Signed-off-by: Dimitar Dimitrov <dimitar@dinux.eu>
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.
Previously, __internal_syscall() compiled into asm-code that unconditionally
sets the syscall argument registers a0 to a5.
For example, the instruction sequence for a exit syscall looked like
this:
li a0, 1 # in ther caller of exit()
# ... # in newlib:
li a1, 0 # unused arguments
li a2, 0
li a3, 0
li a4, 0
li a5, 0
li a7, 93 # exit syscall number
(i.e. the binary contains then 5 superfluous instructions for this
one argument syscall)
This commit changes the RISC-V syscall code such that only the required
syscall argument registers are set.
GCC detects that argc is known at compile time and thus evaluates all the
if-statements where argc is used at compile time (tested with -O2 and -Os).
When off_t is 32 bits, the value needs to be sign-extended to 64 bits
before shifting right to extract the high-order word. Previously
negative offsets were incorrectly encoded.
Signed-off-by: Sandra Loosemore <sandra@codesourcery.com>
The libm gamma functions use the _gamma_signgam field of the reentrant
structure, which changes offset with the --enable-newlib-reent-small
configure option, which means we need to use a newlib nano specific
version of libm in addition to libc in the nano.specs file. Reported
by Keith Packard. There is a riscv-gnu-toolchain patch that goes
along with this to create the new libm_nano.a file.
Signed-off-by: Jim Wilson <jimw@sifive.com>
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>
Target libraries are considered to be built for GCC's "host", not GCC's
"target". The "host" variable must be set by configure scripts using
"config-ml.in" to determine multilib support, otherwise disabled
multilibs (specified as a configure argument with --disable-<multilib>)
will still be built for the subdirectories those configure scripts
reside in.
Commit 72ff9acad2 caused st_atime,
st_ctime, and st_mtime to be defined as macros. This collided with
use of these identifiers as field names in struct gdb_stat (which
represents the GDB RSP encoding of struct stat) in libgloss
semihosting support for nios2 and m68k. This patch renames the
affected fields of struct gdb_stat.
Signed-off-by: Sandra Loosemore <sandra@codesourcery.com>
- 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
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
Left-over part of commit 84b2a020da
The _end marker must be aligned to 4-bytes to ensure that the last
element written does not reach beyond the address of _end. This is
also necessary as the termination condition is an equality test
instead of an ordered test so (_end - _fbss) must be a multiple of
4-bytes. The alignment is already correct for mti*.ld files, fix
it for all remaining MIPS scripts that don't already align to at
least 4.
The .init/.fini sections are not required for msp430-elf, and add unnecessary
code bloat to the CRT library. These sections are specified as "unused" by
the MSP430 EABI.
.init existed to call __crt0_run_{init,preinit}_array which run through
the functions in .{init,preinit}_array.
__crt0_run_{init,preinit}_array are already dynamically included like the
other crt0 functions, so these can be placed before the call to main,
which ensures they are still called if needed.
With these functions moved, .init has no purpose and can be removed.
.fini existed to call __crt0_run_fini_array.
However, the "__msp430_fini" symbol which marks the start of .fini has
never been used, so no termination routines have ever been run for
msp430. On returning from main(), _exit() is called which just loops
forever.
So there is no current expectation that __crt0_run_fini_array will
get called by the CRT code. Further work is to ensure functions
registered with atexit can be optionally called during program termination,
and then __crt0_run_fini_array can be registered with atexit during
program initialization.
The mechanisms for supporting the "-minrt" option have also been removed.
"-minrt" enabled a "minimum runtime environment" by removing calls to
functions which run global static initializers and constructors. Since
this behaviour is now dynamic, and these functions are only included
when needed, the minrt versions of the CRT object files are no longer
required.
SP initialization changes:
1. set default value in semihosting case as well
2. moved existing SP & SL init code for processor modes in separate routine and made it as "hook"
3. init SP for processor modes in Thumb mode as well
Add new macro FN_RETURN, FN_EH_START and FN_EH_END.
This patch adds _LITE_EXIT in crt0.S to enable "lite exit" technique in
RISC-V. The changes have been tested in riscv/riscv-gnu-toolchain by
riscv-dejagnu with riscv-sim.exp/riscv-sim-nano.exp.
The _fdata symbol in MIPS linker scripts is aligned to a 16-byte
boundary. The ALIGN function does not implicitly update current
location counter. If sections positioned after the assignment
do not have the same natural alignment as the ALIGN function then
the start of the section group will not coincide with the value
of the symbol.
Given the linker command sequence:
symbol = ALIGN (NN);
(.section*)
where the idiom implies a desire to mark the beginning of .section
with symbol, there must be an assignment to the location counter
between the assignment to symbol and the .section pattern.
libgloss/
* mips/array.ld: Update the location counter to match _fdata.
* mips/cfe.ld: Likewise.
* mips/ddb-kseg0.ld: Likewise.
* mips/ddb.ld: Likewise.
* mips/dve.ld: Likewise.
* mips/idt.ld: Likewise.
* mips/idt32.ld: Likewise.
* mips/idt64.ld: Likewise.
* mips/idtecoff.ld: Likewise.
* mips/jmr3904app-java.ld: Likewise.
* mips/jmr3904app.ld: Likewise.
* mips/jmr3904dram-java.ld: Likewise.
* mips/jmr3904dram.ld: Likewise.
* mips/lsi.ld: Likewise.
* mips/mti32.ld: Likewise.
* mips/mti64.ld: Likewise.
* mips/mti64_64.ld: Likewise.
* mips/mti64_n32.ld: Likewise.
* mips/nullmon.ld: Likewise.
* mips/pmon.ld: Likewise.
* mips/sde32.ld: Likewise.
* mips/sde64.ld: Likewise.
The compiler driver positions the linker script at the end of the linker
command-line, after crtend.o. As a result, any INPUT objects and archive
GROUPs introduced by the linker script are placed after crtend.o and the
end-of-frame marker provided by crtend.o ends up in between .eh_frames
instead of being at the end.
This has always been a problem, but a binutils update to clean-up
redundant NULL markers in .eh_frame exposes it as a execution failure in
exception-handling tests. This patch re-orders .eh_frames in all
MIPS linker scripts so that the one from crtend.o is always placed last.
libgloss/
* mips/array.ld: Re-order to place .eh_frame from crtend.o
after all other .eh_frame sections.
* mips/cfe.ld: Likewise.
* mips/ddb-kseg0.ld: Likewise.
* mips/ddb.ld: Likewise.
* mips/dve.ld: Likewise.
* mips/idt.ld: Likewise.
* mips/idt32.ld: Likewise.
* mips/idt64.ld: Likewise.
* mips/jmr3904app.ld: Likewise.
* mips/lsi.ld: Likewise.
* mips/mti32.ld: Likewise.
* mips/mti64.ld: Likewise.
* mips/mti64_64.ld: Likewise.
* mips/mti64_n32.ld: Likewise.
* mips/nullmon.ld: Likewise.
* mips/pmon.ld: Likewise.
* mips/sde32.ld: Likewise.
* mips/sde64.ld: Likewise.
Many of the MSP430 crt functions (e.g. to initialize bss) are linked
"dynamically", based on symbols defined in the program.
The GNU assembler defines the symbols corresponding to the crt
functions by examining the section names in the input file.
If GCC has been configured with --enable-initfini-array, then
.init_array and .fini_array will hold pointers to global
constructors/destructors. These sections can also hold functions that
need to be executed for other purposes.
The attached patch puts the __crt0_run_{preinit,init,fini}_array and
__crt0_run_array functions in their own object files, so they will
only be linked when needed.
Successfully regtested the DejaGNU GCC testsuite using the binutils and
newlib changes together with GCC trunk configured with
--enable-initfini-array.
The code in trap.S is to support the old APCS chunked stack variant,
which dates back to the Acorn days, so put it under #ifndef
__ARM_EABI__.
* libgloss/arm/trap.S: Use __ARM_EABI rather than PREFER_THUMB.
* newlib/libc/sys/arm/trap.S: Use __ARM_EABI rather than
__thumb2__.
The location of the handler at offset 0x20 from the start of memory,
immediately after the 32-byte reset vector, matches the expectations
of real hardware (e.g., a 3c120 board).
Author: Sandra Loosemore <sandra@codesourcery.com>
Date: Wed Mar 13 20:22:16 2019 -0700
Add semihosting documentation for nios2 and m68k.
QEMU maintainers have asked for a specification of the nios2
semihosting interface. Since it's essentially a copy of the m68k
implementation, this patch adds a document for that target as well.
The M class cores don't support Semihosting v2 mixed mode, but we were
accidentally using the new immediates for it. My last patch changed the
immediates which broke the build because doing a full multi-lib build
including M architectures now results in an assembler error instead of
silently doing the wrong thing.
This fixes the issue by changing the defines around such that According
to the specs any M class build uses the normal semihosting instructions.
Regtested on arm-none-eabi and no issues, using a build with m class
multilibs too.
The Semihosting v2 protocol requires us to output the Armv8-a HLT instruction
when in mixed mode (SEMIHOST_V2_MIXED_MODE), however it also requires this to
be done for Armv7-a and earlier architectures.
The HLT instruction is defined in the undefined encoding space for older
architectures but simulators such as QEMU already trap on it [1] for all
architectures and is a requirement for semihosting v2 [2].
Unfortunately the GAS restricts the use of HLT to Armv8-a which requires us to
use the instruction encodings we want directly in crt0.
This patch does this, I have not updated newlib/libc/* as that is quite out of
date already. A proper sync is needed in order to get things back in sync.
A different patch for this would be best.
[1] 19a6e31c9d
[2] https://developer.arm.com/docs/100863/latest/the-semihosting-interface
The toplevel makefile used by binutils/gcc/newlib/etc has install-pdf and
install-html targets, but they fail because libgloss doesn't support them.
Tested with an arm-eabi combined tree build and install, and verifying that
the install-pdf and install-html targets now work, and that the pdf and html
doc files are now in the install tree.
libgloss/
* Makefile.in (install-html, install-pdf): New.
* doc/Makefile.in (htmldir, pdfdir): New.
(porting.ps): Delete white space on blank line.
(install-pdf, install-html): New.
The _exit function currently passes -1 as a "sig" to the _kill function as an
invalid signal number so that _kill can distinguish between an abort and a
standard exit.
For boards using the SYS_EXIT_EXTENDED semi-hosting operation to return a
status code, this means that the "status" paramter to _exit is ignored and the
return code is always -1.
https://developer.arm.com/docs/100863/latest/semihosting-operations/sys_exit_extended-0x20
This patch puts shared code between _kill and _exit into a new function
_kill_shared that takes the semi-hosting "reason" to use (if semi-hosting is
available) as an argument.
For semi-hosting _kill_shared provides that "reason".
Without the "sig" argument being used to distinguish between a normal and
abnormal exit, the _exit function can provide the return code to be used if the
SYS_EXIT_EXTENDED operation is available.
Hence the exit code can be returned.
This patch is similar the arm one committed recently.
2018-10-08 Christophe Lyon <christophe.lyon@linaro.org>
* libgloss/aarch64/syscalls.c (_sbrk): Fix prototype.
(_getpid, _write, _swiwrite, _lseek, _swilseek, _read, _wriread):
Likewise.
AngelSWI_Reason_ReportException does not return accoring to the ARM
documentation, so it is valid to mark _kill() as noreturn. This way,
the compiler does not warn about _exit() returning a value despite
being noreturn.
2018-10-01 Christophe Lyon <christophe.lyon@linaro.org>
* libgloss/arm/_exit.c (_exit): Declare _kill() as noreturn.
* libgloss/arm/_exit.c (_kill): Likewise. Remove the return
statements.
* newlib/libc/sys/arm/syscalls.c (_kill): Likewise..
It's been a while... I see the CRIS port broke with the
time_t-default-to-64-bit change, observable by a few test-cases in the
gcc fortran(!) tests failing, regressing when trying a recent newlib.
This is a two-part belt-and-suspenders change: adjust the CRIS port
gettimeofday syscall (the only one in newlib/CRIS passing a time_t or
struct timeval) to handle a userspace 64-bit time_t and secondly default
time_t to 32-bit long anyway. I considered making the local
"kernel_timeval" copy in _gettimeofday conditional on (userspace) time_t
being 64 bits, but thought it not worth bothering with the few move insns.
The effect of a 64-bit time_t is however observable as longer simulation
time when running the gcc testsuite and as bigger binaries without any
actual upside from the larger time_t size, so I thought better make the
default for this port go back to being a "long" again.
Tested by running the gcc testsuite over the three combinations of two
parts of the patch and observing the expected changes. Committed.
libgloss:
Adjust for syscall and userspace having different time_t or timeval.
* cris/linunistd.h (kernel_time_t, kernel_suseconds_t, kernel_timeval):
New types.
(gettimeofday): Change the type of the first argument to be a
pointer to a struct kernel_timeval.
* cris/gensyscalls (_gettimeofday): Use an intermediate struct
kernel_timeval for the syscall and initialize the result from
that.
Signed-off-by: Hans-Peter Nilsson <hp@axis.com>
Upon successful completion, times() shall return the elapsed real time,
in clock ticks, since an arbitrary point in the past (for example,
system start-up time).
Signed-off-by: Kito Cheng <kito.cheng@gmail.com>
Introduce new host configuration variable "have_init_fini" which is set
to "yes" by default. Override it for RISC-V to "no".
Signed-off-by: Sebastian Huber <sebastian.huber@embedded-brains.de>
The current SYS_EXIT has a bug that when making the call it always uses
the v2 calling convention. This is undefined behavior according to the
semihosting specification:
https://developer.arm.com/docs/100863/latest/semihosting-operations/sys_exit-0x18
This patch fixes it by making sure v1 passes the argument directly in the register instead
of in a block. And for v2 it does the same if the v2 extension isn't supported.
The sequence generated now is
12424: ebfffecd bl 11f60 <_has_ext_exit_extended>
12428: e3500000 cmp r0, #0
1242c: 11a0500d movne r5, sp
12430: 059d5000 ldreq r5, [sp]
12434: e1a00004 mov r0, r4
12438: e1a01005 mov r1, r5
1243c: ef00f000 svc 0x0000f000
Signed-off-by: Tamar Christina <tamar.christina@arm.com>
Previously, hw exception handler stub and interrupt handler stub for microbaze were unable to
be overwritten. Change to weak to fix this.
Signed-off-by: Ben Levinsky <ben.levinsky@xilinx.com>
The previous multi-build implementation was copying the config.status from the parent
multilib directory when building the different semihosting variants. It did so because
the configuration doesn't change. However when you use a relative path to configure it
turns out that the paths inside the config.status are also relative.
To fix this, the srcdir is adjusted from the initial configuration instead of copying it.
Tested on aarch64-none-elf and arm-none-eabi.
Signed-off-by: Tamar Christina <tamar.christina@arm.com>
- For prevent confuse about what BSD license variant we used, 2- or
3-clause license, we change the license to FreeBSD license to make
it unambiguously refers to the 2-clause license.
Nowadays, the code fetching command line options via semi-hosting are
unconditionally pulled in, so that the semi-hosting code is still
there even I compile with option --specs=nosys.specs.
gdb ./aarch64-none-elf/libgloss/aarch64/crt0.o
(gdb) disassemble _start
0x0000000000000050 <+80>: ldr x1, 0x128 <_cpu_init_hook+48>
0x0000000000000054 <+84>: mov w0, #0x15
0x0000000000000058 <+88>: hlt #0xf000
This patch fixes this problem by wrapping the code by ARM_RDI_MONITOR.
When semi-hosting is not used, set command line options to NULL.
On AArch64 we currently always link in crt0 regardless of if another
one is being provided by something else, like rdimon.a. This was never
an issue before as nosys was not supported on AArch64.
This updates the specs to supply a different crt0 when a semihosting
call is required.
Signed-off-by: Tamar Christina <tamar.christina@arm.com>
This fixed the compile for nosys and validation specs
but nosys won't run because of existing limitations to
aarch64's syscalls.c, it requires semihosting to get
commandline arguments and heap info without having a
fallback method as ARM does.
Signed-off-by: Tamar Christina <tamar.christina@arm.com>
This patch fixes the issue where nosys.specs is used to link.
e.g. The use of crt0 without any support for semihosting requested.
The AArch64 crt0 was missing an #ifdef for the initialise_monitor_handles
which was causing the link to fail. Sorry for missing this before.
Semihosting v2 changes are documented here:
https://developer.arm.com/docs/100863/latest/
The biggest change is the addition of an extensions mechanism
to add more extensions in the future.
Signed-off-by: Tamar Christina <tamar.christina@arm.com>
Semihosting v2 changes are documented here:
https://developer.arm.com/docs/100863/latest/
The biggest change is the addition of an extensions mechanism
to add more extensions in the future.
Signed-off-by: Tamar Christina <tamar.christina@arm.com>
This uses the new recursive build target in multi-build.in
The new spec files are:
For AArch32/ARM (m for mixed mode):
- rdimon-v2m.specs
- aprofile-validation-v2m.specs
- aprofile-ve-v2m.specs
These spec files will be using the new libraries generated
by multi-build.in.
Signed-off-by: Tamar Christina <tamar.christina@arm.com>
This uses the new recursive build target in multi-build.in
For AArch64 no new spec files are needed but the makefiles
are modified to keep them in sync with the ARM ones.
Signed-off-by: Tamar Christina <tamar.christina@arm.com>
e.g. from the same source file produce multiple libs by varying the
options passed to the compiler.
Signed-off-by: Tamar Christina <tamar.christina@arm.com>
When simulating arm code, the target program startup code (crt0) uses
semihosting invocations to get the command line from the simulator. The
simulator returns the command line and its size into the area passed in
parameter. (ARM 32-bit specifications :
http://infocenter.arm.com/help/topic/com.arm.doc.dui0058d/DUI0058.pdf
chapter "5.4.19 SYS_GET_CMDLINE").
The memory area pointed by the semihosting register argument is located
in .text section (usually not writtable (RX)).
If we run this code on a simulator that respects this rights properties
(qemu user-mode for instance), the command line will not be written to
the .text program memory, in particular the length of the string. The
program runs with an empty command line. This problem hasn't been seen
earlier probably because qemu user-mode is not so much used, but this can
happen with another simulator that refuse to write in a read-only segment.
With this modification, the command line can be correctly passed to the
target program.
Changes:
- libgloss/arm/crt0.S : Arguments passed to the AngelSWI_Reason_GetCmdLine
semihosting invocation are placed into .data section instead of .text
- libgloss/aarch64/crt0.S : Idem for aarch64 AngelSVC_Reason_GetCmdLine
semihosting.
ARM EABI toolchains can optionally use the "hf" suffix to identify
hardware floating point support. Use the "*-*-eabi*" pattern to match
these toolchains.
Original patch by Bryan Hundven for the Crosstool-NG project. Improved
by Alexey Neyman.
Signed-off-by: Carlos Santos <casantos@datacom.ind.br>
CC: Bryan Hundven <bryanhundven@gmail.com
CC: Alexey Neyman <stilor@att.net>
The changes in af272aca59 only works when
using gcc/g++ with -E or -save-temps, otherwise newlib's newlib.h gets
used even if -specs=nano.specs is specified. This is because the driver
only use cpp_options spec for the external cpp tool, not for the
integrated one.
This patch uses instead cpp_unique_options which is used in all cases:
it is used directly when the integrated preprocessor is used, and
indirectly by expansion of cpp_options otherwise.
Hi,
The changes in c028685518 to use
newlib-nano's include directory work for cc1 but not cc1plus. cc1plus
comes with its own cpp spec which does not have a name attached to it.
This patch uses the renaming trick on cpp_options instead of cpp, as
cpp_options is used both by cc1 and cc1plus.
Environ is defined in libgloss and libc:
- libgloss/or1k/syscalls.c
- libc/stdlib/environ.c
When linking we sometimes get errors:
or1k-elf-g++ test.o -mnewlib -mboard=or1ksim -lm -o test
/opt/shorne/software/or1k/lib/gcc/or1k-elf/5.3.0/../../../../or1k-elf/lib/libor1k.a(syscalls.o):(.data+0x0):
multiple definition of `environ'
/opt/shorne/software/or1k/lib/gcc/or1k-elf/5.3.0/../../../../or1k-elf/lib/libc.a(lib_a-environ.o):(.data+0x0):
first defined here
collect2: error: ld returned 1 exit status
This doesnt happen after the fix. Basic things build fine too.
There was an issue revealed in gdb testing where C++ virtual tables
were not getting properly initialized. This seems to be due to the
c++ global constructors moving from ctors to init_array.
This fix makes sure we call the proper method for initializing the
constructors in all places.
or1k uses reentrant calls by default, but there was no open_r defined
which caused failure in C++/C code such as:
int main() { std::cout << "test\n"; return 0; }
or
int main() {open(".", 0);}
After a binutils change "a while ago" (2015-12) to default to
--enable-initfini-array, i.e. to merge .ctors and .dtors into
.init_array and .fini_array, this is needed for cdtors to run at all.
Based on what goes on in arm/ and aarch64/. Tested for cris-elf by
running the gcc testsuite.
By the way, the configure test doesn't detect this change, so the
HAVE_INITFINI_ARRAY ifdeffery is somewhat redundant. Still, the
change is tested to be safe with older binutils too.
libgloss/
* cris/crt0.S, cris/lcrt0.c: Include newlib.h.
[HAVE_INITFINI_ARRAY] (_init): Define to __libc_init_array.
[HAVE_INITFINI_ARRAY] (_fini): Ditto __libc_fini_array.
HTML build fails with makeinfo 5.2 with the following error:
libgloss/doc/porting.texi:73: @menu seen before first @node
libgloss/doc/porting.texi:73: perhaps your @top node should be wrapped in
@ifnottex rather than @ifinfo?
Following the advice indeed solve the issue while still allowing pdf, dvi and
info builds to work.
ARCompact processors (ARC 600 and ARC 700) require three "nop"s after the
"flag 1" instruction. Later ARC processors do not have this requirement, so
it is possible to reduce size of "_exit_halt" for them.
libgloss/
2016-05-24 Anton Kolesov <Anton.Kolesov@synopsys.com>
* arc/crt0.S (_exit_halt): Insert nops only for ARCompact.
Initially crt0.S used a special function, declared as weak as a default
exception handler in interrupt vector table. To let user override individual
handlers, this function had multiple names - one for each IVT entry, which,
however, was terribly confusing for the debugger and user - because it
wasn't clear which symbol will be used as a function name in debugger.
Defining multiple separate functions - one for each handler, would resolve
the mess, but would increase code size of crt0.o.
To clean this up, this patch defines exception handlers as weak symbols as
well, but those are defined as just symbols, not functions, hence there
would be less confusion over what is what. At the same time, users still can
redefine exception handlers symbol by creating functions with respective
names.
libgloss/
2016-05-24 Anton Kolesov <Anton.Kolesov@synopsys.com>
* arc/crt0.S: Convert memory_error and friends to non-function
symbols.
crt0.S for ARC used to use instruction "asr.f lp_count, r3, 2" for all cores
except ARC601. However instructions which shift more than 1 bit are
optional, so this crt0.S didn't worked for all ARC cores.
Luckily this is a shift just by 2 bits on all occassions, so fix is trivial
- use two single-bit shifts.
libgloss/ChangeLog
2016-04-29 Anton Kolesov <anton.kolesov@synopsys.com>
* arc/crt0.S: Fix support for processors without barrel-shifter.
Signed-off-by: Anton Kolesov <Anton.Kolesov@synopsys.com>
This is similar to commit 06537f05d4 to the
newlib for ARC.
GCC for ARC has been updated to provide consistent naming of preprocessor
definitions for different optional architecture features:
* __ARC_BARREL_SHIFTER__ instead of __Xbarrel_shifter for
-mbarrel-shifter
* __ARCEM__ instead of __EM__ for ARC EM cores
* __ARCHS__ instead of __HS__ for ARC HS cores
* etc (not used in libgloss)
This patch updates crt0.S for ARC to use new definitions instead of a
deprecated ones. To ensure compatibility with older compiler new definitions
are also defined in crt0.S if needed, based on presence of deprecated
preprocessor definitions.
libgloss/ChangeLog
2016-04-29 Anton Kolesov <Anton.Kolesov@synopsys.com>
* arc/crt0.S: Use new GCC defines to detect processor features.
ARC aproach to this feature is similiar to ARM's one here.
2016-04-29 Anton Kolesov <anton.kolesov@synopsys.com>
* arc/nano.specs: New file.
* arc/Makefile.in: Support nano.specs.
* arc/nsim.specs: Likewise.
While running tests on internal systems, we identified an issue in the
startup code for newlib on AArch32 systems with Multiprocessor
Extensions to the architecture.
The issue is we were configuring page table flags to be Inner
cacheable/Outer non-cacheable, while for at least architectures with
Multiprocessor Extension, we'd configure it to Inner/Outer write-back, no
write-allocate, and cacheable.
The attached patch fixes this, and no regression on arm-none-eabi
bare-metal tests.
Adopted suggestion given by Richard offline to avoid using jump.
libgloss/
* arm/cpu-init/rdimon-aem.S: Set TTBR0 to inner/outer
cacheable WB, and no allocate on WB for arch with multiprocessor
extension.
Change the type of the stack pointers to enable pointer calculations at byte
granularity, which is needed for the calculation of _or1k_stack_core[c] and
_or1k_exception_stack_core[c] with _or1k_stack_size and
_or1k_exception_stack_size. (util.c:53-54)
libgloss:
* arm/Makefile.in: Add newlib/libc/machine/arm to the include path if
newlib is present.
* arm/arm.h: Include acle-compat.h.
(THUMB_V7_V6M): Rename to ...
(PREFER_THUMB): This. Use ACLE macros __ARM_ARCH_ISA_ARM instead of
__ARM_ARCH_6M__ to decide whether to define it.
(THUMB1_ONLY): Define for Thumb-1 only targets.
(THUMB_V7M_V6M): Rename to ...
(THUMB_VXM): This. Defined based on __ARM_ARCH_ISA_ARM, excluding
ARMv7.
* arm/crt0.S: Use THUMB1_ONLY rather than __ARM_ARCH_6M__,
!__ARM_ARCH_ISA_ARM rather than THUMB_V7M_V6M for fp enabling, and
PREFER_THUMB rather than THUMB_V7_V6M. Rename other occurences of
THUMB_V7M_V6M to THUMB_VXM.
* arm/linux-crt0.c: Likewise.
* arm/redboot-crt0.S: Likewise.
* arm/swi.h: Likewise.
* arm/trap.S: Likewise.
newlib:
* libc/machine/arm/memcpy-stub.c: Use ACLE macros __ARM_ARCH_ISA_THUMB
and __ARM_ARCH_ISA_ARM to check for Thumb-2 only targets rather than
__ARM_ARCH and __ARM_ARCH_PROFILE.
* libc/machine/arm/memcpy.S: Likewise.
* libc/machine/arm/setjmp.S: Likewise for Thumb-1 only target and
include acle-compat.h.
* libc/machine/arm/strcmp.S: Likewise for Thumb-1 and Thumb-2 only
target and include acle-compat.h.
* libc/sys/arm/arm.h: Include acle-compat.h.
(THUMB_V7_V6M): Rename to ...
(PREFER_THUMB): This. Use ACLE macro __ARM_ARCH_ISA_ARM instead of
__ARM_ARCH_6M__ to decide whether to define it.
(THUMB1_ONLY): Define for Thumb-1 only targets.
(THUMB_V7M_V6M): Rename to ...
(THUMB_VXM): This. Defined based on __ARM_ARCH_ISA_ARM, excluding
ARMv7.
* libc/sys/arm/crt0.S: Use PREFER_THUMB rather than THUMB_V7_V6M and
rename THUMB_V7M_V6M into THUMB_VXM.
* libc/sys/arm/swi.h: Likewise.
The MSP430 debuggers support I/O on hardware through CIO, so
we can use a CIO-enabled library as the "nosys" library (in
addition to the libsim library, which talks to our simulator)
* configure.in: Don't build default libnosys for msp430
* configure: Regenerate.
* msp430/Makefile: Rename libcio to libnosys.
The file libgloss/rl78/write.c currently contains code which outputs
\r when \n is seen. The code will then output the \n as well.
This patch removes the bit of code that tests for \n and then outputs
\r.
I made this change to fix some failures in gdb.base/call-ar-st.exp. In
that test, I see two carriage returns followed by a newline. One CR is
output by the libgloss code. The other is output by the terminal driver.
The total list of failures fixed (using the default rl78 multilib) are:
FAIL: gdb.base/call-ar-st.exp: print print_double_array(double_array) (timeout)
FAIL: gdb.base/call-ar-st.exp: print print_char_array(char_array) (timeout)
FAIL: gdb.base/call-ar-st.exp: continue to tbreak2 (timeout)
FAIL: gdb.base/call-ar-st.exp: continuing to tbreak3 (timeout)
FAIL: gdb.base/call-ar-st.exp: print print_double_array(array_d) (timeout)
FAIL: gdb.base/call-ar-st.exp: continuing to tbreak4 (timeout)
FAIL: gdb.base/call-ar-st.exp: print sum_array_print(10, *list1, *list2, *list3, *list4) (timeout)
FAIL: gdb.base/call-ar-st.exp: print print_small_structs (timeout)
FAIL: gdb.base/call-ar-st.exp: print print_ten_doubles(123.456, 123.456, -0.12, -1.23, 343434.8, 89.098, 3.14, -5678.12345, -0.11111111, 216.97065) (timeout)
FAIL: gdb.base/call-ar-st.exp: print print_small_structs from print_long_arg_list (timeout)
FAIL: gdb.base/call-ar-st.exp: print print_struct_rep(*struct1, *struct2, *struct3) (timeout)
FAIL: gdb.base/dprintf.exp: call: printf: 1st dprintf (timeout)
FAIL: gdb.base/dprintf.exp: call: printf: 2nd dprintf (timeout)
FAIL: gdb.base/interrupt.exp: process is alive (the program exited)
There are no regressions.
libgloss/ChangeLog:
* rl78/write.c (_write): Don't output CR when LF is encountered.
Allow exceptions to be nested, which is especially useful with urgent
interrupts while processing an exception.
The implementation counts up the nesting level with each call to an
exception. In the outer exception (level 1), the exception stack is
started. All nested exceptions just reserve the redzone (scratch
memory that may be used by compiler) and exception context on the
stack, but then process on the same scratch.
Restriction: Impure pointers are shared among all exceptions. This may
be solved by creating an impure data structure in the stack frame with
each nested exception.
* or1k/crt0.S: Add exception nesting
* or1k/exceptions-asm.S: ditto
* or1k/util.c: ditto
- With the gzll kernel we have two different loading options:
- If the image is loaded to the global memory, the bootstrapping
loads the kernel to local memory. Applications are loaded on
demand. The heap then starts right after bss.
- If the image is pre-loaded to the local memory it includes the
application binaries right after bss. The heap then starts after
the application objects.
- We can check if this is a gzll kernel as it has the string "gzll" at
0x2000. At 0x200c we then find the end of the application objects in
the image. If there is no global memory we set _or1k_heap_start to
this value.
* or1k/boards/optimsoc.S: Heap for gzll kernel
- Previously the heap started right after the bss section. This can now
be configured by changing the _or1k_heap_start symbol that defaults to
the old value (&end). In board_init_early, we can now set this to
another value.
* or1k/sbrk.c: Allow for different heap start
- Store the exception program counter (from EPCR) and exception status
register (from ESR) also during the exception. A runtime system may
replace them thereby to implement a thread switch.
* or1k/exception-asm.S: Store missing state
- We do not need a red zone here, as we do not operate on the current
stack, but always use the clear exception stack. Also reserve two
extra words for the context to store EPCR and ESR.
* or1k/crt0.S: Fix exception stack frame
* or1k/exception-asm.S: ditto
- During interrupt handling the PICSR, table pointers and current
interrupt line have been saved in incorrect registers and/or stored on
the stack.
- Save the pointer in r16/r18, PICSR in r20 and the current interrupt
line in r22. Those are callee-saved registers, so that the register
values will be preserved.
* or1k/interruts-asm.S: Change registers to callee-saved.
* msp430/msp430-sim.ld (.stack): Add an assertion to make sure
that the data area does not overrun the stack. PROVIDE a new
symbol __stack_size to allow the user to set the limit.
* msp430/msp430xl-sim.ld (.stack): Likewise.
* rl78/rl78-sim.ld (.stack): Likewise.
* rl78/rl78.ld (.stack): Likewise.
* rx/rx-sim.ld (.stack): Likewise.
* rx/rx.ld (.stack): Likewise.
* msp430/msp430.ld: Delete.
* msp430/msp430F5438A-l.ld: Delete.
* msp430/msp430F5438A-s.ld: Delete.
* msp430/crt_movedata.S: Delete.
* msp430/Makefile.in (SCRIPTS): Remove msp430.ld.
(CRT_OBJS): Add crt_move_highdata.o.
* msp430/memmodel.h (START_CRT_FUNC): New macro.
(END_CRT_FUNC): New macro.
(WEAK_DEF): New macro.
* msp430/crt0.S: Use new macros.
(move_highdata): New code to initialise the .data section if it is
held in high memory.
* msp430/msp430-sim.ld (.data): Add .either.data.
(.rodata2): Move some read-only data sections here.
(.text): Add .either.text.
(.rodata): Add .either.rodata.
(.bss): Add .either.bss.
* msp430/msp430xl-sim.ld (MEMORY): Add HIROM.
(.rodata2): Move some read-only data sections here.
(.upper.data): New section. Include notes about how to initialise
it.
This header was clearly copied from the common syscall.h and customized,
but the header comment is no longer accurate -- this isn't the general
file anymore.
Jozef Lawrynowicz
Dimitar Dimitrov
Richard Earnshaw
Georg Sauthoff
Sandra Loosemore
Jim Wilson
Keith Packard
Anthony Green
Jeff Law
Jeff Johnston
Alexander Fedotov
Faraz Shahbazker
Faraz Shahbazker
Christophe Lyon
Tamar Christina
Matthew Malcomson
Hans-Peter Nilsson
Denis Ivanov
Sebastian Huber
Ben Levinsky
Jaap de Wolff
Chih-Mao Chen
Yaakov Selkowitz
Alexander Fedotov-B55613
Kito Cheng
Kito Cheng
Szabolcs Nagy
Yao Qi
Claudiu Zissulescu
Martin Young
Laurent ALFONSI
Jozef Lawrynowicz
Carlos Santos
Thomas Preud'homme
Thomas Preudhomme
Stafford Horne
Olof Kindgren
Claudiu Zissulescu
Nick Clifton
Anton Kolesov
David Hoover
Jiong Wang
Stefan Roesch
Corinna Vinschen
DJ Delorie
Kevin Buettner
Andre Simoes Dias Vieira
Mike Frysinger