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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>
2023-11-02arm: 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
2023-09-15fork: 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>
2023-09-14fstatat: 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>
2023-08-14gettimeofday() only include ldso.h if vdso support is activatedlordrasmus
2023-08-14c6x compile fix vdso 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
2023-08-06powerpc: fix conflicting definitions with newer Linux kernelWaldemar Brodkorb
2023-08-02add missing wchar.h, fixes a compile error with openadkWaldemar Brodkorb
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>
2023-05-10gettimeofday: fix static buildWaldemar 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>
2022-12-19gettimeofday() vdso supportramin
2022-12-19sycall macro for vdso supportramin
2022-11-20RISC-V 32-bit supportustcymgu@gmail.com
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>
2022-10-14Static pie support for ppclinted
Modified config files and crt1.S to support static pie elf generation. Signed-off-by: linted <linted@users.noreply.github.com>
2022-10-14arc: add optimized string functions for ARCv3Pavel Kozlov
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>
2022-09-27arc: add support for ARCv3 32-bit processorsSergey Matyukevich
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>
2022-09-27arc: add asm macrosSergey Matyukevich
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>
2022-09-21xtensa: add static pie supportMax Filippov
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
2022-09-07Added support for creation of Static Position-Independent Executables (PIE) ↵linted
on mips Updated config to allow compilation of rcrt1.o for mips and modified it's crt1.S to perform relocates in __start. The mips architecture performs relocations differently then most other architectures. reloc_static_pie was rewritten, taking code from dl-startup.c, in order to perfrom the additional relocations. Modifications were made to mips' dl-startup.h to allow for the use of contained macros without including _start definition. Signed-off-by: linted <linted@users.noreply.github.com>
2022-08-08Added support for creation of Static Position-Independent Executables (PIE) ↵linted
on aarch64 Updated config to allow compilation of rcrt1.o for aarch64 and modified it's crt1.S to relocate dynamic section prior to __uClibc_main. Disabled stack protector when compiling reloc_static_pie.c to avoid TLS access prior to it being setup. Signed-off-by: linted <linted@users.noreply.github.com>
2022-08-08resource.h: add missing RUSAGE_THREADWaldemar Brodkorb
There is a real-world usage of RUSAGE_THREAD by the pistache project, https://github.com/oktal/pistache. Reported-By: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
2022-07-26Added support for creation of Static Position-Independent Executables (PIE) ↵linted
on i386, x86_64, and arm. This patch adds the generation of rcrt1.o which is used by gcc when compiling with the --static-pie flag. rcrt1.o differs from crt1.o and Scrt1.o in that it the executable has a dynamic section but no relocations have been performed prior to _start being called. crt1.o assumes there to be no dynamic relocations, and Scrt1.o has all relocations performed prior to execution by lsdo. The new reloc_static_pie function handles parsing the dynamic section, and performing the relocations in a architecture agnostic method. It also sets _dl_load_base which is used when initalizing TLS to ensure loading from the proper location. This allows for easier porting of static-pie support to additional architectures as only modifications to crt1.S to find the load address are required. Signed-off-by: linted <linted@users.noreply.github.com>
2022-06-20xtensa: implement user context manipulation functionsMax Filippov
Implement getcontext, makecontext, setcontext and swapcontext. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
2022-05-20define RLIMIT_RTTIME, bump RLIMIT_NLIMITSRomain Naour
This macro exists since Linux 2.6.25 [1] and is defined in glibc since 2.14 [2] for sparc and most supported architectures. RLIMIT_RTTIME has been added later for mips [3] and alpha [4]. For example, RLIMIT_RTTIME is needed to build qemu 7.0.0 with Linux user-land emulation support [5]. [1] https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=78f2c7db6068fd6ef75b8c120f04a388848eacb5 [2] https://sourceware.org/git/?p=glibc.git;a=commitdiff;h=67f86a251e0d36107fe28999281d46e76941c7b9 [3] https://sourceware.org/git/?p=glibc.git;a=commitdiff;h=8969f4df1a526aa60dd0bc1c4736cf02104d4a05 [4] https://sourceware.org/git/?p=glibc.git;a=commitdiff;h=53c2cb7641bd866398156625ef672bbd2d78a0d8 [5] https://git.qemu.org/?p=qemu.git;a=commitdiff;h=244fd08323088db73590ff2317dfe86f810b51d7 Signed-off-by: Romain Naour <romain.naour@gmail.com>
2022-02-27guard prlimit, reported by Lance FredricksonWaldemar Brodkorb
2022-01-28sched.h: Add SCHED_DEADLINEPetr Vorel
Defined in kernel v3.14, commit aab03e05e8f7 ("sched/deadline: Add SCHED_DEADLINE structures & implementation") Signed-off-by: Petr Vorel <petr.vorel@gmail.com>
2022-01-21add prlimit syscall wrapper, now for realWaldemar Brodkorb
2022-01-21add prlimit syscall wrapperWaldemar Brodkorb
2022-01-21nds32: sync with binutils 2.37, gcc 11.2 and linux 5.10.93 changesWaldemar Brodkorb
2022-01-10arc: fix signal handler restorerSergey Matyukevich
When MD_FALLBACK_FRAME_STATE_FOR handler in libgcc unwind code checks the second instruction opcode in __default_rt_sa_restorer function, it expects to see the following values for ARC cores: - 0x7ee0781e for ARCv2 LE - 0x003f226f for ARC700 LE ARC700 value correspond to trap0 instruction. ARCv2 value corresponds to the following code: traps_0 j_s [blink] However, unlike glibc, uClibc implementation of __default_rt_sa_restorer for ARC does not have that jump. Hence libgcc unwind code is not able to recognize signal frame correctly on ARCv2 and completes too early. This change fixes libgcc unwinding over signal frame on ARCv2 adding missing jump to __default_rt_sa_restorer. Signed-off-by: Sergey Matyukevich <sergey.matyukevich@synopsys.com>
2021-12-24Fix some warnings due to type issuesYann Sionneau
Fixes those two warnings: In file included from <command-line>: libc/sysdeps/linux/common/openat64.c:18:33: warning: 'openat64' alias between functions of incompatible types 'int(int, const char *, int, ...)' and 'int(int, const char *, int, mode_t)' {aka 'int(int, const char *, int, unsigned int)'} [-Wattribute-alias=] 18 | strong_alias_untyped(__openat64,openat64) | ^~~~~~~~ ./include/libc-symbols.h:177:31: note: in definition of macro '_strong_alias_untyped' 177 | extern __typeof (aliasname) aliasname __attribute__ ((alias (#name))) __attribute_copy__ (name); | ^~~~~~~~~ libc/sysdeps/linux/common/openat64.c:18:1: note: in expansion of macro 'strong_alias_untyped' 18 | strong_alias_untyped(__openat64,openat64) | ^~~~~~~~~~~~~~~~~~~~ libc/sysdeps/linux/common/openat64.c:14:12: note: aliased declaration here 14 | static int __openat64(int fd, const char *file, int oflag, mode_t mode) | ^~~~~~~~~~ and CC libc/sysdeps/linux/common/stat.os libc/sysdeps/linux/common/stat.c: In function 'stat': libc/sysdeps/linux/common/stat.c:28:40: warning: passing argument 3 of 'fstatat64' from incompatible pointer type [-Wincompatible-pointer-types] 28 | return fstatat64(AT_FDCWD, file_name, buf, 0); | ^~~ | | | struct stat * In file included from libc/sysdeps/linux/common/stat.c:11: ./include/sys/stat.h:258:35: note: expected 'struct stat64 * restrict' but argument is of type 'struct stat *' 258 | struct stat64 *__restrict __buf, int __flag) | ~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~ Signed-off-by: Yann Sionneau <ysionneau@kalray.eu>
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