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2023-11-10arc: add acq/rel variants for atomic cmpxchg/xchgPavel Kozlov
Add acquire/release variants for atomic functions cmpxchg/xchg and provide a memory barrier after/before exchange. For cmpxchg use compiler builtins. For xchg functions add memory barrier explicitly. These barriers are required to keep memory consistency of ARCv3 CPU cores in SMP. For ARC700 barriers are not required and the compiler doesn't provide _atomic_compare_exchange*, use current asm insertion without acquire/release variants for ARC700. Signed-off-by: Pavel Kozlov <pavel.kozlov@synopsys.com>
2023-11-10prlimit: add name redirection and fix incorrect parameters to syscallPavel Kozlov
The tst-rlimit/tst-rlimit64 tests pointed to several issueses in prlimit() function for 32-bit CPUs. This patch adds name redirection to prlimit64 in prlimit declaration to provide correct support for 64-bit offset (_FILE_OFFSET_BITS=64) on 32-bit CPUs and fixes improper field assignment and incorrect syscall paramerets in the prlimit() function. Fixes: 8c2f6218 ("setrlimit/getrlimit: fix prlimit64 syscall use for 32-bit CPUs") Signed-off-by: Pavel Kozlov <pavel.kozlov@synopsys.com>
2023-11-09libpthread/nptl: make default stack size configurableBen Wolsieffer
Threads currently have 2-4 MiB stacks by default (depending on the platform). This is fine on MMU platforms, where this stack space is not actually allocated until it is used, but tends to waste a large amount of memory on no-MMU platforms. This patch adds a PTHREADS_STACK_DEFAULT_SIZE Kconfig option that allows the user to override the default stack size at build time. This allows the user to select a reasonable default stack size for the software that runs on their system, and avoids the need to patch every package to add calls to pthread_attr_setstacksize(). An alternative to this patch would be to change the hardcoded default stack size on no-MMU platforms, but it is difficult to choose an appropriate value because the minimum required stack depends on the software in use. This would also be a breaking change. Signed-off-by: Ben Wolsieffer <ben.wolsieffer@hefring.com>
2023-11-02setjmp.h: Fix C++ build and avoid duplicate throw declarationMarcus Hähnel
Commit 21cbb6fe ("unistd.h: put getppid under XOPEN2K8") introduced a new __THROWNL specification for non-leaf throws. It also made use of these in the setjmp.h header. The functions that use this specification (longjmp and siglongjmp) have their extern __libc__* equivalent definition prototype specified using __typeof__ for the internal function signatures. For C++ this copies the throw() specifier, since this is part of the type for C++. The attribute in C is not. This commit explicitly types out the signature for the two functions to be compatible between the C++ and C worlds. An alternative would be to keep the __typeof__ declaration and use the copy attribute. Then the __THROWNL part could be thrown out since the C attribute would be copied and the C++ exception specifier would be part of the signature from __type__. However, since the copy attribute is not supported for all compilers supported by uclibc-ng this is not viable at this time.
2023-11-02arm: elf-fdpic.h: avoid void pointer subtractionBen Wolsieffer
elf-fdpic.h is included by link.h. When a C++ program includes <link.h>, we get the following build failure: <...>/usr/include/bits/elf-fdpic.h: In function ‘void* __reloc_pointer(void*, const elf32_fdpic_loadmap*)’: <...>/usr/include/bits/elf-fdpic.h:94:54: error: invalid use of ‘void’ 94 | unsigned long offset = p - (void*)map->segs[c].p_vaddr; | ^~~~~~~ void pointer addition and subtraction is not allowed in C++ as it has undetermined size, however in C with language extension it is possible because sizeof void is treated as one byte. This patch was previously applied to Blackfin, FR-V and C6x, but not ARM. Signed-off-by: Ben Wolsieffer <ben.wolsieffer@hefring.com>
2023-10-28Fix -Warray-parameter warning for __sigsetjmpPavel Kozlov
Fix the [-Warray-parameter=] warning for __sigsetjmp generated by GCC 11 and later GCC versions: | | warning: argument 1 of type 'struct __jmp_buf_tag *' declared as a pointer [-Warray-parameter=] | extern int __sigsetjmp (struct __jmp_buf_tag *__env, int __savemask) __THROWNL; | ... | note: previously declared as an array 'struct __jmp_buf_tag[1]' | extern int __sigsetjmp (struct __jmp_buf_tag __env[1], int __savemask) | Use the same fix as in glibc. The fix is to move the struct __jmp_buf_tag definition to a separate bits/ header so it can be included in pthread.h, to allow to use an array (as in setjmp.h) rather than a pointer in the declaration. Signed-off-by: Pavel Kozlov <pavel.kozlov@synopsys.com>
2023-10-27setrlimit/getrlimit: fix prlimit64 syscall use for 32-bit CPUsPavel Kozlov
Commit 95e38b37 ("add support for systems without legacy setrlimit/getrlimit syscalls") has added use of the prlimit64 syscall in getrlimit and setrlimit functions. This change causes memory corruption on getrlimit call for 32-bit CPUs like ARC, as ARC doesn't have ugetrlimit syscall and uses prlimit64. Also, setrlimit has been broken by prlimit64 call on 32-bit CPUs like, i386, ARM, ARC. For the prlimit64 syscall the kernel expects an rlimit struct with 64-bit fields, but on 32-bit CPUs without _FILE_OFFSET_BITS=64 the struct rlimit has 32-bit fields. Add safe implementations of getrlimit, setrlimit, prlimit for 32-bit CPUs with a local struct rlimit64 variable for use in the prlimit64 syscall. For 64-bit CPUs and configurations with _FILE_OFFSET_BITS=64 use getrlimit, setrlimit, prlimit as aliases to getrlimit64, setrlimit64 and prlimit64. Add a new function prlimit64. Tested on aarch64, arm, i386, arc. Fixes: 95e38b37 ("add support for systems without legacy setrlimit/getrlimit syscalls") Signed-off-by: Pavel Kozlov <pavel.kozlov@synopsys.com>
2023-10-27depend on __UCLIBC_HAVE_STATX__Waldemar Brodkorb
Fixes compilation issues on mips64 n32.
2023-09-28riscv64: define __NR_riscv_flush_icache if not availableWaldemar Brodkorb
2023-09-23aarch64: disable lazy relocationsWaldemar Brodkorb
Fixes segfaults in curl with gnutls encryption.
2023-09-17lm32: disable ctor/dtorWaldemar Brodkorb
2023-09-15fork: generate stub on no-MMU systemsBen Wolsieffer
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>
2023-09-14kvx: fix asm syntaxPaul Iannetta
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>
2023-09-14kvx: use a custom stat.h headerYann Sionneau
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>
2023-09-14kvx: define that kvx port supports statx syscallYann Sionneau
Define that kvx Linux port supports statx syscall. Signed-off-by: Yann Sionneau <ysionneau@kalray.eu>
2023-09-14kvx: align specification of user regsYann Sionneau
Align the specification of the ptrace interface with how it is specified on RISC-V. Signed-off-by: Yann Sionneau <ysionneau@kalray.eu>
2023-09-14kvx: atomic: rework using compiler builtinsYann Sionneau
Signed-off-by: Yann Sionneau <ysionneau@kalray.eu>
2023-09-14kvx: add support for kv3-2 (Coolidge v2 SoC)Yann Sionneau
The only difference, with regard to libc, is the compile flag: -march= Signed-off-by: Yann Sionneau <ysionneau@kalray.eu>
2023-09-14fstatat: add wrapper that uses statx for non-legacy archYann Sionneau
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>
2023-09-14add support for systems without legacy setrlimit/getrlimit syscallsYann Sionneau
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>
2023-09-14fstat: add missing return value statement for the statx wrapping caseYann Sionneau
Add missing return value statement to fstat for the statx wrapping case. Signed-off-by: Yann Sionneau <ysionneau@kalray.eu>
2023-09-14fstatat64: define it as a wrapper of statx if the kernel does not support ↵Yann Sionneau
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>
2023-09-07daemon.c: make _fork_parent static inline againMax Filippov
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>
2023-08-14gitignorelordrasmus
2023-08-14vdso support for x86_64lordrasmus
2023-08-14gettimeofday() only include ldso.h if vdso support is activatedlordrasmus
2023-08-14c6x compile fix vdso supportlordrasmus
2023-08-14vdso support missing filelordrasmus
2023-08-14fix getauxval() on aarch64 gcc 11lordrasmus
2023-08-14fix file permissionslordrasmus
2023-08-14add vsdo supportlordrasmus
2023-08-12arm: add hwcap header fileWaldemar Brodkorb
2023-08-09fcntl.h: declare f_owner_ex for all architecturesWaldemar Brodkorb
2023-08-08aarch64: add hwcap header fileWaldemar Brodkorb
2023-08-06bump version for 1.0.44 releasev1.0.44Waldemar Brodkorb
2023-08-06getauxval: remove header for static buildsWaldemar Brodkorb
Fixes haveged compile issues in OpenADK and buildroot when a static toolchain is used.
2023-08-06powerpc: fix conflicting definitions with newer Linux kernelWaldemar Brodkorb
2023-08-03linuxthreads/signal: improve sigaction behaviorMax Filippov
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>
2023-08-02add missing wchar.h, fixes a compile error with openadkWaldemar Brodkorb
2023-07-30des.c: constify des tablesMax Filippov
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>
2023-07-14[PATCH] libc/sysdeps/linux/common/bits/wchar.h: resync with glibc, fix build ↵Waldemar Brodkorb
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>
2023-06-12Fix compilation error on noMMU/nothread systems with old compilersYann Sionneau
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>
2023-06-12Revert "librt: avoid compilation error"Yann Sionneau
This reverts commit 08d46f1ce21e4ec51b2b1626beeaea6cbe7fdc6b. Signed-off-by: Yann Sionneau <yann@sionneau.net>
2023-05-10gettimeofday: fix static buildWaldemar Brodkorb
2023-04-05bump version for 1.0.43 releasev1.0.43Waldemar Brodkorb
2023-03-13Emulate 'futimesat' when __NR_futimesat is not available.Elliot Thomas
2023-02-03riscv64: fix linking with binutils 2.40Waldemar Brodkorb
See here for details: https://sourceware.org/bugzilla/show_bug.cgi?id=28509
2023-01-22Defined MAP_FIXED_NOREPLACElinted
Added definition for MAP_FIXED_NOREPLACE which was added in kernel 4.17 Signed-off-by: linted <linted@users.noreply.github.com>
2023-01-22Fix for CVE-2022-29503.linted
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>
2023-01-08Add lost includes. Fix add getauxval() implementation.Evgeniy Manachkin
Signed-off-by: Evgeniy Manachkin <sfstudio@wi-cat.ru>