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fork() can be implemented using either the fork or clone syscalls on MMU
systems. Therefore the stub is only generated if neither __NR_fork nor
__NR_clone are defined. The stub code manually undefines __NR_fork on
no-MMU systems in an attempt to enable the stub, but this doesn't work
because __NR_clone is still defined. It is not appropriate to undefine
__NR_clone because clone is available on no-MMU, it is just not capable
of implementing fork.
This patch directly enables the fork stub if __ARCH_USE_MMU__ is not
defined. This eliminates the need to undefine __NR_fork, so this code is
removed
Signed-off-by: Ben Wolsieffer <ben.wolsieffer@hefring.com>
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Previously kvx assembler considered all separators (",", "?", "=", "[]")
to be the same, this is not the case anymore hence we need to fix all
the misformed assembly.
Signed-off-by: Paul Iannetta <piannetta@kalray.eu>
Acked-by: Yann Sionneau <ysionneau@kalray.eu>
Tested-by: Yann Sionneau <ysionneau@kalray.eu>
Signed-off-by: Yann Sionneau <ysionneau@kalray.eu>
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Use a custom stat.h header for kvx arch.
This makes sure it is aligned with Linux kernel one.
Signed-off-by: Yann Sionneau <ysionneau@kalray.eu>
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Define that kvx Linux port supports statx syscall.
Signed-off-by: Yann Sionneau <ysionneau@kalray.eu>
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Align the specification of the ptrace interface with how it is specified on RISC-V.
Signed-off-by: Yann Sionneau <ysionneau@kalray.eu>
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Signed-off-by: Yann Sionneau <ysionneau@kalray.eu>
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The only difference, with regard to libc, is the compile flag: -march=
Signed-off-by: Yann Sionneau <ysionneau@kalray.eu>
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Add fstatat wrapper that uses statx for non-legacy arch.
This allows non-legacy arch to opt-out from defining the old stat* syscalls
by not defining __ARCH_WANT_NEW_STAT in their
arch/xxx/include/asm/unistd.h
Signed-off-by: Yann Sionneau <ysionneau@kalray.eu>
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Those must have the recent prlimit64 syscall which exists since
Linux 3.2.
This patch is necessary for non-legacy architectures that wish to remove
support for legacy setrlimit/getrlimit syscalls.
The non-legacy arch are those who opt-out via non defining
__ARCH_WANT_SET_GET_RLIMIT in their arch/xxx/include/uapi/asm/unistd.h
setrlimit and getrlimit are then emulated via the new prlimit64 syscall.
Signed-off-by: Yann Sionneau <ysionneau@kalray.eu>
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Add missing return value statement to fstat for the statx wrapping case.
Signed-off-by: Yann Sionneau <ysionneau@kalray.eu>
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fstatat64 syscall
Define fstatat64 as a wrapper of statx if the kernel does not support fstatat64 syscall
This is the case for non-legacy architectures that don't define __ARCH_WANT_NEW_STAT
in their linux arch/xxx/include/asm/unistd.h
Signed-off-by: Yann Sionneau <ysionneau@kalray.eu>
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The commit cf649082c7d4 ("remove forced gcc optimization") removed -O3
optimization specified in the code for the function _fork_parent, but at
the same time it removed the 'static inline' part of the function
definition. That change seems unintended and _fork_parent is not a part
of the libc interface. Make it static inline again.
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
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Fixes haveged compile issues in OpenADK and buildroot when
a static toolchain is used.
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Setting signal handler in the kernel and then updating sighandler[sig]
results in a crash if a signal which handler is being changed from
SIG_DFL to a non-default was pending. Improve the race a little and
update the sighandler[sig] before the sigaction syscall. It doesn't
eliminate the race entirely, but fixes this particular failing case.
E.g. this fixes the 100% reproducible segfault in the busybox hush shell
built with FEATURE_EDITING_WINCH on ssh client's terminal window resize,
but in that case there's one more even bigger issue: busybox calls
sigaction with both old and new signal pointers pointing to the same
structure instance, as a result act->sa_handler after the sigaction
syscall is not what the user requested, but the previous handler.
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
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DES tables take up a huge amount of space in the .bss and they aren't
even variable. Generate constant tables and put them into des_tables.c
and drop constants and code used to generate them from des.c
This saves ~70KBytes of the .bss and ~3KBytes of the total library size:
text data bss dec hex filename
- 618508 25652 89400 733560 b3178 lib/libuClibc-1.0.42.so
+ 685664 25672 19488 730824 b26c8 lib/libuClibc-1.0.42.so
Modified libc passes the DES validation suite from the uclibc-ng-test.
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
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issue with gcc 12
The current definition of __WCHAR_MIN and __WCHAR_MAX are only correct
when wchar_t is an int. This is not the case on ARM/AArch64 where
wchar_t is an unsigned int, or some other architectures where wchar_t
is a long.
The current incorrect definition causes a build issue for example when
building mpd, which uses boost, with gcc 12.x:
In file included from /home/thomas/buildroot/aarch64/host/aarch64-buildroot-linux-uclibc/sysroot/usr/include/boost/integer.hpp:20,
from /home/thomas/buildroot/aarch64/host/aarch64-buildroot-linux-uclibc/sysroot/usr/include/boost/crc.hpp:42,
from ../src/storage/StorageState.cxx:43:
/home/thomas/buildroot/aarch64/host/aarch64-buildroot-linux-uclibc/sysroot/usr/include/boost/integer_traits.hpp:105:69: error: narrowing conversion of ‘-2147483648’ from ‘int’ to ‘wchar_t’ [-Wnarrowing]
105 | public detail::integer_traits_base<wchar_t, WCHAR_MIN, WCHAR_MAX>
| ^
This issue was fixed in glibc in 2013, see bug report
https://sourceware.org/bugzilla/show_bug.cgi?id=15036, and upstream
commit
https://sourceware.org/git/?p=glibc.git;a=commit;h=052aff95782fefe9c63566471063e8b20836bfb8.
Since the i386-specific definition of __WCHAR_MIN and __WCHAR_MAX was
also removed at the same time in glibc, we do the same as part of this
commit.
Reported-by: Clément Ramirez <clement.ramirez@bootlin.com>
With-some-useful-help-from: Paul Kocialkowski <paul.kocialkowski@bootlin.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
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For instance with buildroot config sipeed_maix_bit_defconfig the pre-processor generates
if (1)
r = ({ long _sys_result; { register long int _a7 __asm__ ("a7"); register long _a3 __asm__ ("a3"); long _a3tmp; register long _a2 __asm__ ("a2"); long _a2tmp; register long _a1 __asm__ ("a1"); long _a1tmp; long _a0tmp; register long _a0 __asm__ ("a0"); _a0tmp = (long) (clock_id); _a0 = _a0tmp; _a1tmp = (long) (flags); _a1 = _a1tmp; _a2tmp = (long) (req); _a2 = _a2tmp; _a3tmp = (long) (rem); _a3 = _a3tmp; _a7 = (115); __asm__ volatile ( "scall\n\t" : "=r" (_a0) : "r"(_a7) , "r" (_a0), "r" (_a1), "r" (_a2), "r" (_a3) : "memory"); _sys_result = _a0; } _sys_result; });
else
{
int oldstate = LIBC_CANCEL_ASYNC ();
r = ({ long _sys_result; { register long int _a7 __asm__ ("a7"); register long _a3 __asm__ ("a3"); long _a3tmp; register long _a2 __asm__ ("a2"); long _a2tmp; register long _a1 __asm__ ("a1"); long _a1tmp; long _a0tmp; register long _a0 __asm__ ("a0"); _a0tmp = (long) (clock_id); _a0 = _a0tmp; _a1tmp = (long) (flags); _a1 = _a1tmp; _a2tmp = (long) (req); _a2 = _a2tmp; _a3tmp = (long) (rem); _a3 = _a3tmp; _a7 = (115); __asm__ volatile ( "scall\n\t" : "=r" (_a0) : "r"(_a7) , "r" (_a0), "r" (_a1), "r" (_a2), "r" (_a3) : "memory"); _sys_result = _a0; } _sys_result; })
;
LIBC_CANCEL_RESET (oldstate);
}
And also the compiler issues these warnings:
librt/clock_nanosleep.c: In function 'clock_nanosleep':
librt/clock_nanosleep.c:43:22: warning: implicit declaration of function
'LIBC_CANCEL_ASYNC'; did you mean 'LIBC_CANCEL_HANDLED'?
[-Wimplicit-function-declaration]
43 | int oldstate = LIBC_CANCEL_ASYNC ();
| ^~~~~~~~~~~~~~~~~
| LIBC_CANCEL_HANDLED
librt/clock_nanosleep.c:48:7: warning: implicit declaration of function
'LIBC_CANCEL_RESET'; did you mean 'LIBC_CANCEL_HANDLED'?
[-Wimplicit-function-declaration]
48 | LIBC_CANCEL_RESET (oldstate);
| ^~~~~~~~~~~~~~~~~
| LIBC_CANCEL_HANDLED
So if the compiler is a bit picky and does not optimize the if (1) {} else {} it can fail to link with undefined symbols.
This patch fixes this issue: no more warning.
Btw, that's the solution that is already used in the following cancellation point files:
* libc/sysdeps/linux/common/__syscall_fcntl.c
* libc/sysdeps/linux/common/__syscall_fcntl64.c
* libc/sysdeps/linux/common/ioctl.c
* libc/sysdeps/linux/common/openat.c
* libc/sysdeps/linux/common/open.c
Signed-off-by: Yann Sionneau <yann@sionneau.net>
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This reverts commit 08d46f1ce21e4ec51b2b1626beeaea6cbe7fdc6b.
Signed-off-by: Yann Sionneau <yann@sionneau.net>
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See here for details:
https://sourceware.org/bugzilla/show_bug.cgi?id=28509
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Added definition for MAP_FIXED_NOREPLACE which was added in kernel 4.17
Signed-off-by: linted <linted@users.noreply.github.com>
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Changed linux thread's stack allocation mmap to use new MAP_FIXED_NOREPLACE flag on kernels >4.17.
For older kernels, a check is added to see if requested address matches the address received.
If the addresses don't match, an error is returned and thread creation is aborted.
Signed-off-by: linted <linted@users.noreply.github.com>
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Signed-off-by: Evgeniy Manachkin <sfstudio@wi-cat.ru>
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on MIPS.
Signed-off-by: Evgeniy Manachkin <sfstudio@wi-cat.ru>
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Added 32-bit RISC-V support. I have managed to get 32-bit RISC-V No-MMU
Linux running based on mainstream buildroot. It's nice to have uclibc
support this 32-bit No-MMU target.
There's no substantial code change except definations and config
options.
Signed-off-by: Yimin Gu <ustcymgu@gmail.com>
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Modified config files and crt1.S to support static pie elf generation.
Signed-off-by: linted <linted@users.noreply.github.com>
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Add ability to use optimized versions of string functions for ARCv3 32-bit
CPUs with UCLIBC_HAS_STRING_ARCH_OPT option. Add optimized
memcpy/memset/memcmp code for ARCv3 CPUs based on the code from newlib
and adapt for ARCv3 existed optimized strchr/strcmp/strcpy/strlen.
Link to the Synopsys newlib repo with code for ARCv3 on GitHub:
https://github.com/foss-for-synopsys-dwc-arc-processors/newlib
Signed-off-by: Pavel Kozlov <pavel.kozlov@synopsys.com>
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New ARCv3 ISA includes both 64-bit and 32-bit CPU family.
This patch adds support for 32-bit ARCv3 HS5x processors.
Signed-off-by: Sergey Matyukevich <sergey.matyukevich@synopsys.com>
Signed-off-by: Pavel Kozlov <pavel.kozlov@synopsys.com>
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Add a header file with assembler macros to be able to handle in one
place the differences between ARCv2 and ARCv3 ISAs. It is a preparatory
step before the introduction of support for ARCv3 CPUs.
Signed-off-by: Sergey Matyukevich <sergey.matyukevich@synopsys.com>
Signed-off-by: Pavel Kozlov <pavel.kozlov@synopsys.com>
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Option '-mno-long-calls' is not supported by all arc gcc compilers.
For instance, this option is not supported by GCC for ARCv3 processors.
Check if this option is supported before applying it.
Signed-off-by: Sergey Matyukevich <sergey.matyukevich@synopsys.com>
Signed-off-by: Pavel Kozlov <pavel.kozlov@synopsys.com>
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Add missing ARCv2 check in MATCH_MACHINE macro.
Update comment for EM_ARCV2 define.
Signed-off-by: Sergey Matyukevich <sergey.matyukevich@synopsys.com>
Signed-off-by: Pavel Kozlov <pavel.kozlov@synopsys.com>
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