- Cygwin console with xterm compatible mode causes problem reported
in https://www.cygwin.com/ml/cygwin-patches/2020-q1/msg00212.html
if background/foreground colors are set to gray/black respectively
in Win10 1903/1909. This is caused by "CSI Ps L" (IL), "CSI Ps M"
(DL) and "ESC M" (RI) control sequences which are broken. This
patch adds a workaround for the issue.
The helper function ttynam creates a tty name by using sprintf wrongly
on a pretty short buffer. The foramt string only specifies a minimum
field length, not a maximum field length, so gcc-9.2.0 complains:
ps.cc:101:23: warning: 'sprintf' may write a terminating nul past the
end of the destination [-Wformat-overflow=]
Fix this thoroughly by specifying a maximum field width as well as by
using snprintf with a fixed buffer length. Also, drop using a static
buffer in favor of using a buffer in the caller.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
...from structs used for data exchange between clients and cygserver.
All of the structs have the same size and member offsets, packed or
unpacked. Keeping the packed attribute results in ominous warnings
from gcc-9.2.0:
cygserver.cc:259:10: warning: taking address of packed member of
'client_request_attach_tty::request_attach_tty' may result in an
unaligned pointer value [-Waddress-of-packed-member]
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
gcc-9.2.0 has an execve builtin which uses the nothrow attribute.
This results in an error when aliasing execve to _execve for newlib:
exec.cc:88:23: error: 'int _execve(const char*, char* const*, char*
const*)' specifies less restrictive attribute than its target
'int execve(const char*, char* const*, char* const*)': 'nothrow'
[-Werror=missing-attributes]
88 | EXPORT_ALIAS (execve, _execve) /* For newlib */
Add the -fno-builtin-execve CFLAGS when building exec.o to override
the gcc builtin.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
The variable returning the overrun count from the tracker object after
disarming the overrun counter was not correctly initialized. For some
reason this has only been noticed by gcc-9.2.0, not by the formerly used
gcc-7.4.0.
This problem should not have had any runtime impact. The method
timer_tracker::disarm_overrun_event is supposed to be called in
lock-step with timer_tracker::arm_overrun_event, which in turn
results in the variable getting a valid value.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
linux 4.6 x86/cpu: Add advanced power management bits
Bit 11 of CPUID 8000_0007 edx is processor feedback interface.
Bit 12 of CPUID 8000_0007 edx is accumulated power.
Print proper names in /proc/cpuinfo
[missed enabling this 2016 change during previous major cpuinfo update
as no power related changes were made to the Linux files since then]
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.
- Accessing shared_console_info before initialization causes access
violation because it is a NULL pointer. The cause of the problem
reported in https://cygwin.com/ml/cygwin/2020-02/msg00197.html is
this NULL pointer access in request_xterm_mode_output() when it is
called from close(). This patch makes sure that shared_console_info
is not NULL before calling request_xterm_mode_output().
Added in Linux 5.6:
Check FSRM and use REP MOVSB for short copies on systems that have it.
>From the Intel Optimization Reference Manual:
3.7.6.1 Fast Short REP MOVSB
Beginning with processors based on Ice Lake Client microarchitecture,
REP MOVSB performance is enhanced with string lengths up to 128 bytes.
Support for fast-short REP MOVSB is indicated by the CPUID feature flag:
CPUID [EAX=7H, ECX=0H).EDX.FAST_SHORT_REP_MOVSB[bit 4] = 1.
There is no change in the REP STOS performance.
A NUL byte in the output stream got accidentally not handled as IGN char
in xterm console mode. The internal mbtowc conversion doesn't handle
embedded NUL values gracefully, it always stops converting at NUL bytes.
This broke the output of strings with embedded NUL bytes.
Fix this by always skipping IGN chars in the "normal char output loop"
and make sure not to move the cursor one position to the right, as in
legacy console mode.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
NSIG is a deprecated symbol only visible under MISC visibility.
_NSIG is used widely instead, and on most systems NSIG is
defined in terms of _NSIG.
Follow suit: Change NSIG to _NSIG throughout and change visiblity
of NSIG to be defined only in __MISC_VISIBLE case.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
- If two cygwin programs are executed simultaneousley with pipes
in cmd.exe, xterm compatible mode is accidentally disabled by
the process which ends first. After that, escape sequences are
not handled correctly in the other app. This is the problem 2
reported in https://cygwin.com/ml/cygwin/2020-02/msg00116.html.
This patch fixes the issue. This patch also fixes the problem 3.
For these issues, the timing of setting and unsetting xterm
compatible mode is changed. For read, xterm compatible mode is
enabled only within read() or select() functions. For write, it
is enabled every time write() is called, and restored on close().
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
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).
- In push_to_pcon_screenbuffer(), open() and ioctl() are called.
Since push_to_pcon_screenbuffer() is called in read() and write(),
errno which is set in read() and write() code may be overwritten
in open() or ioctl() call. This patch prevent this situation.
- PTY has a bug reported in:
https://cygwin.com/ml/cygwin/2020-02/msg00067.html.
This is the result of state mismatch between real pseudo console
attaching state and state variable. This patch fixes the issue.
- PTY has a problem that the key input, which is typed during
windows native app is running, disappear when it returns to shell.
(Problem 3 in https://cygwin.com/ml/cygwin/2020-02/msg00007.html)
This is beacuse pty has two input pipes, one is for cygwin apps
and the other one is for native windows apps. The key input during
windows native program is running is sent to the second input pipe
while cygwin shell reads input from the first input pipe.
This patch realize transfering input data between these two pipes.
- Debug codes used in the early stage of pseudo console support are
removed. (Regarding ALWAYS_USE_PCON and USE_API_HOOK) Along with
this, the codes related to this change are organized.
- PTY code has a problem that tcsh is terminated if the following
command is executed.
true; chcp &
This seems to be caused by invalid pointer access which occurs
when the process exits during the kill() code is execuetd. This
patch avoids the issue by not using kill().
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>
- With this patch, foreground color and background color are allowed
to be set simultaneously by 24 bit color escape sequence such as
ESC[38;2;0;0;255;48;2;128;128;0m in legacy console mode.
When fhandler_base::fstat_helper is called, the handle h returned by
get_stat_handle() should be pc.handle() and should be safe to use for
getting the file information. Previously, the call to
get_file_attribute() for FIFOs set the first argument to NULL instead
of h, thereby forcing the file to be opened for fetching the security
descriptor in get_file_sd().
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>
Make fhandler_socket_local::dup and fhandler_socket_local::fcntl (a
new method) call fhandler_base::dup and fhandler_base::fcntl if O_PATH
is set.
We're viewing the socket as a disk file here, but there's no need to
implement the actions of fhandler_disk_file::dup and
fhandler_disk_file::fcntl, which do nothing useful in this case beyond
what the fhandler_base methods do. (The extra actions are only useful
when I/O is going to be done on the file.)
If O_PATH is set, then the fhandler_socket_local object has a handle
that can be used for getting the statvfs information. Use it by
calling fhandler_base::fstatvfs_by_handle. Without this change,
fhandler_disk_file::fstatfvs would be called on a new fhandler_disk
object, which would then have to be opened.
If an AF_LOCAL socket is opened with O_PATH, all socket system calls
that take a file descriptor argument fail on the resulting descriptor.
Make sure that errno is set as on Linux for those calls that are
implemented on Linux. In almost all cases it is ENOTSOCK. There are
two exceptions:
- sockatatmark(3); errno is EBADF.
- bindresvport(3); errno is EAFNOSUPPORT if the second argument sin
(of type struct sockaddr_in *) is non-NULL and satisfies
sin->sin_family == AF_INET.
Finally, there are two BSD socket system calls implemented on Cygwin
but not Linux: getpeereid(3) and bindresvport_sa(3). Set errno to
ENOTSOCK for these for consistency with the majority of the other
calls.
If that flag is not set, or if an attempt is made to open a different
type of socket, the errno is now EOPNOTSUPP instead of ENXIO. This is
consistent with POSIX, starting with the 2016 edition. Earlier
editions were silent on this issue.
Opening is done in a (new) fhandler_socket_local::open method by
calling fhandler_base::open_fs.
Also add a corresponding fhandler_socket_local::close method.
Takashi Yano
Corinna Vinschen
Brian Inglis
Joel Sherrill
Thomas Wolff
Nicolas Brunie
Georg Sauthoff
Keith Packard
Sandra Loosemore
Ken Brown
Jim Wilson