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* Enable --enable-fortify-source with clangAdhemerval Zanella2024-04-171-4/+4
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* linux: Avoid indirection on operand of type 'void *' for gettimeofdayAdhemerval Zanella2024-04-171-2/+2
| | | | | | | ISO C does not allow and it fixes a clang issue with -Werror,-Wvoid-ptr-dereference. Checked on x86_64-linux-gnu.
* x86: Use bool for C++ on x86.hAdhemerval Zanella2024-04-171-1/+1
| | | | | Not all compilers might define C99 _Bool type on C++ mode in old standard modes (clang does not define for -std=c++98).
* linux: Adequate tst-clone3 to c11 atomicsAdhemerval Zanella2024-04-172-10/+6
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* dirent: Remove variable lenght array structure for tst-getdents64.cAdhemerval Zanella2024-04-171-11/+5
| | | | | | | | | | Clang emits the following warnings: ../sysdeps/unix/sysv/linux/tst-getdents64.c:111:18: error: fields must have a constant size: 'variable length array in structure' extension will never be supported char buffer[buffer_size]; ^
* And defines to __attribute__ (__noclone__) iff compiler supports it.Adhemerval Zanella2024-04-173-3/+3
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* riscv: Do not use cfi_label when building with clangAdhemerval Zanella2024-04-172-2/+2
| | | | | | | The .cfi_label is a gas extension not supported by clang. From a ziglang discussion [1], it seems that it is not really required. [1] https://github.com/ziglang/zig/issues/3340
* aarch64: Use 64-bit variable to access the special registersAdhemerval Zanella2024-04-172-2/+2
| | | | | | | | | | | clang issues: error: value size does not match register size specified by the constraint and modifier [-Werror,-Wasm-operand-widths] while tryng to use 32 bit variables with 'mrs' to get/set the fpsr, dczid_el0, and ctr. Since all of 64 bit register, use the expected variable size.
* string: Use asm alias instead of symbol redirections for stpcpy and mempcpyAdhemerval Zanella2024-04-172-0/+6
| | | | | | | | | | | | | | | | Commit 939da411433 added symbols redirections to handle ISO C namespace, however some compiler does not support to redeclare the function prototype. Moving these defintions to exported header it not a good practice (it exposes a internal implementation and it would require to add macros to define it only internally). Instead this patch replaces the symbol redirections by direct asm aliases, as done to handle libcall generation done by compiler on some loop optimizations. The only issue is sparc binutils generates an extra __mempcpy plt not called anywhere in the code, which indicates a binutils issue (this is added in the localplt.data for now). Checked on all affected ABIs.
* Suppress -Wmaybe-uninitialized only for gccAdhemerval Zanella2024-04-171-1/+1
| | | | The warning is not supported by clang.
* elf: Add CPU iteration support for future use in ld.so diagnosticsFlorian Weimer2024-04-081-0/+46
| | | | Reviewed-by: Szabolcs Nagy <szabolcs.nagy@arm.com>
* Cleanup __tls_get_addr on alpha/microblaze localplt.dataAdhemerval Zanella2024-04-042-4/+0
| | | | | | They are not required. Checked with a make check for both ABIs.
* arm: Remove ld.so __tls_get_addr plt usageAdhemerval Zanella2024-04-041-2/+0
| | | | | | Use the hidden alias instead. Checked on arm-linux-gnueabihf.
* aarch64: Remove ld.so __tls_get_addr plt usageAdhemerval Zanella2024-04-041-2/+0
| | | | | | Use the hidden alias instead. Checked on aarch64-linux-gnu.
* aarch64/fpu: Add vector variants of erfcJoe Ramsay2024-04-041-0/+5
| | | | Reviewed-by: Szabolcs Nagy <szabolcs.nagy@arm.com>
* aarch64/fpu: Add vector variants of tanhJoe Ramsay2024-04-041-0/+5
| | | | Reviewed-by: Szabolcs Nagy <szabolcs.nagy@arm.com>
* aarch64/fpu: Add vector variants of sinhJoe Ramsay2024-04-041-0/+5
| | | | Reviewed-by: Szabolcs Nagy <szabolcs.nagy@arm.com>
* aarch64/fpu: Add vector variants of atanhJoe Ramsay2024-04-041-0/+5
| | | | Reviewed-by: Szabolcs Nagy <szabolcs.nagy@arm.com>
* aarch64/fpu: Add vector variants of asinhJoe Ramsay2024-04-041-0/+5
| | | | Reviewed-by: Szabolcs Nagy <szabolcs.nagy@arm.com>
* aarch64/fpu: Add vector variants of acoshJoe Ramsay2024-04-041-0/+5
| | | | Reviewed-by: Szabolcs Nagy <szabolcs.nagy@arm.com>
* aarch64/fpu: Add vector variants of coshJoe Ramsay2024-04-041-0/+5
| | | | Reviewed-by: Szabolcs Nagy <szabolcs.nagy@arm.com>
* aarch64/fpu: Add vector variants of erfJoe Ramsay2024-04-041-0/+5
| | | | Reviewed-by: Szabolcs Nagy <szabolcs.nagy@arm.com>
* misc: Add support for Linux uio.h RWF_NOAPPEND flagStafford Horne2024-04-041-0/+1
| | | | | | | | | | | | | | | | | | | In Linux 6.9 a new flag is added to allow for Per-io operations to disable append mode even if a file was opened with the flag O_APPEND. This is done with the new RWF_NOAPPEND flag. This caused two test failures as these tests expected the flag 0x00000020 to be unused. Adding the flag definition now fixes these tests on Linux 6.9 (v6.9-rc1). FAIL: misc/tst-preadvwritev2 FAIL: misc/tst-preadvwritev64v2 This patch adds the flag, adjusts the test and adds details to documentation. Link: https://lore.kernel.org/all/20200831153207.GO3265@brightrain.aerifal.cx/ Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
* Always define __USE_TIME_BITS64 when 64 bit time_t is usedAdhemerval Zanella2024-04-0240-77/+82
| | | | | | | | | | | | | | | | | | | | It was raised on libc-help [1] that some Linux kernel interfaces expect the libc to define __USE_TIME_BITS64 to indicate the time_t size for the kABI. Different than defined by the initial y2038 design document [2], the __USE_TIME_BITS64 is only defined for ABIs that support more than one time_t size (by defining the _TIME_BITS for each module). The 64 bit time_t redirects are now enabled using a different internal define (__USE_TIME64_REDIRECTS). There is no expected change in semantic or code generation. Checked on x86_64-linux-gnu, i686-linux-gnu, aarch64-linux-gnu, and arm-linux-gnueabi [1] https://sourceware.org/pipermail/libc-help/2024-January/006557.html [2] https://sourceware.org/glibc/wiki/Y2038ProofnessDesign Reviewed-by: DJ Delorie <dj@redhat.com>
* or1k: Add prctl wrapper to unwrap variadic argsStafford Horne2024-03-221-0/+42
| | | | | | | | | | | | | On OpenRISC variadic functions and regular functions have different calling conventions so this wrapper is needed to translate. This wrapper is copied from x86_64/x32. I don't know the build system enough to find a cleaner way to share the code between x86_64/x32 and or1k (maybe Implies?), so I went with the straight copy. This fixes test failures: misc/tst-prctl nptl/tst-setgetname
* AArch64: Check kernel version for SVE ifuncsWilco Dijkstra2024-03-211-0/+48
| | | | | | | | | | | | | | | | Old Linux kernels disable SVE after every system call. Calling the SVE-optimized memcpy afterwards will then cause a trap to reenable SVE. As a result, applications with a high use of syscalls may run slower with the SVE memcpy. This is true for kernels between 4.15.0 and before 6.2.0, except for 5.14.0 which was patched. Avoid this by checking the kernel version and selecting the SVE ifunc on modern kernels. Parse the kernel version reported by uname() into a 24-bit kernel.major.minor value without calling any library functions. If uname() is not supported or if the version format is not recognized, assume the kernel is modern. Tested-by: Florian Weimer <fweimer@redhat.com> Reviewed-by: Szabolcs Nagy <szabolcs.nagy@arm.com>
* powerpc: Add HWCAP3/HWCAP4 data to TCB for Power Architecture.Manjunath Matti2024-03-195-0/+14
| | | | | | | | | | | | | This patch adds a new feature for powerpc. In order to get faster access to the HWCAP3/HWCAP4 masks, similar to HWCAP/HWCAP2 (i.e. for implementing __builtin_cpu_supports() in GCC) without the overhead of reading them from the auxiliary vector, we now reserve space for them in the TCB. This is an ABI change for GLIBC 2.39. Suggested-by: Peter Bergner <bergner@linux.ibm.com> Reviewed-by: Peter Bergner <bergner@linux.ibm.com>
* linux: Use rseq area unconditionally in sched_getcpu (bug 31479)Florian Weimer2024-03-151-8/+0
| | | | | | | | | | | | | | | | | | | Originally, nptl/descr.h included <sys/rseq.h>, but we removed that in commit 2c6b4b272e6b4d07303af25709051c3e96288f2d ("nptl: Unconditionally use a 32-byte rseq area"). After that, it was not ensured that the RSEQ_SIG macro was defined during sched_getcpu.c compilation that provided a definition. This commit always checks the rseq area for CPU number information before using the other approaches. This adds an unnecessary (but well-predictable) branch on architectures which do not define RSEQ_SIG, but its cost is small compared to the system call. Most architectures that have vDSO acceleration for getcpu also have rseq support. Fixes: 2c6b4b272e6b4d07303af25709051c3e96288f2d Fixes: 1d350aa06091211863e41169729cee1bca39f72f Reviewed-by: Arjun Shankar <arjun@redhat.com>
* Update kernel version to 6.8 in header constant testsJoseph Myers2024-03-133-4/+4
| | | | | | | | | This patch updates the kernel version in the tests tst-mman-consts.py, tst-mount-consts.py and tst-pidfd-consts.py to 6.8. (There are no new constants covered by these tests in 6.8 that need any other header changes.) Tested with build-many-glibcs.py.
* Update syscall lists for Linux 6.8Joseph Myers2024-03-1327-2/+137
| | | | | | | | Linux 6.8 adds five new syscalls. Update syscall-names.list and regenerate the arch-syscall.h headers with build-many-glibcs.py update-syscalls. Tested with build-many-glibcs.py.
* riscv: Fix alignment-ignorant memcpy implementationAdhemerval Zanella2024-03-126-13/+98
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The memcpy optimization (commit 587a1290a1af7bee6db) has a series of mistakes: - The implementation is wrong: the chunk size calculation is wrong leading to invalid memory access. - It adds ifunc supports as default, so --disable-multi-arch does not work as expected for riscv. - It mixes Linux files (memcpy ifunc selection which requires the vDSO/syscall mechanism) with generic support (the memcpy optimization itself). - There is no __libc_ifunc_impl_list, which makes testing only check the selected implementation instead of all supported by the system. This patch also simplifies the required bits to enable ifunc: there is no need to memcopy.h; nor to add Linux-specific files. The __memcpy_noalignment tail handling now uses a branchless strategy similar to aarch64 (overlap 32-bits copies for sizes 4..7 and byte copies for size 1..3). Checked on riscv64 and riscv32 by explicitly enabling the function on __libc_ifunc_impl_list on qemu-system. Changes from v1: * Implement the memcpy in assembly to correctly handle RISCV strict-alignment. Reviewed-by: Evan Green <evan@rivosinc.com> Acked-by: Palmer Dabbelt <palmer@rivosinc.com>
* linux/sigsetops: fix type confusion (bug 31468)Andreas Schwab2024-03-122-9/+9
| | | | | | Each mask in the sigset array is an unsigned long, so fix __sigisemptyset to use that instead of int. The __sigword function returns a simple array index, so it can return int instead of unsigned long.
* riscv: Add and use alignment-ignorant memcpyEvan Green2024-03-012-0/+33
| | | | | | | | | | | | For CPU implementations that can perform unaligned accesses with little or no performance penalty, create a memcpy implementation that does not bother aligning buffers. It will use a block of integer registers, a single integer register, and fall back to bytewise copy for the remainder. Signed-off-by: Evan Green <evan@rivosinc.com> Reviewed-by: Palmer Dabbelt <palmer@rivosinc.com> Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
* riscv: Add ifunc helper method to hwprobe.hEvan Green2024-03-011-0/+29
| | | | | | | | Add a little helper method so it's easier to fetch a single value from the hwprobe function when used within an ifunc selector. Signed-off-by: Evan Green <evan@rivosinc.com> Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
* riscv: Add __riscv_hwprobe pointer to ifunc callsEvan Green2024-03-011-0/+10
| | | | | | | | | | | | | | | | | | The new __riscv_hwprobe() function is designed to be used by ifunc selector functions. This presents a challenge for applications and libraries, as ifunc selectors are invoked before all relocations have been performed, so an external call to __riscv_hwprobe() from an ifunc selector won't work. To address this, pass a pointer to the __riscv_hwprobe() function into ifunc selectors as the second argument (alongside dl_hwcap, which was already being passed). Include a typedef as well for convenience, so that ifunc users don't have to go through contortions to call this routine. Users will need to remember to check the second argument for NULL, to account for older glibcs that don't pass the function. Signed-off-by: Evan Green <evan@rivosinc.com> Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
* riscv: Add hwprobe vdso call supportEvan Green2024-03-014-2/+16
| | | | | | | | | The new riscv_hwprobe syscall also comes with a vDSO for faster answers to your most common questions. Call in today to speak with a kernel representative near you! Signed-off-by: Evan Green <evan@rivosinc.com> Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
* linux: Introduce INTERNAL_VSYSCALLEvan Green2024-03-011-0/+12
| | | | | | | | | Add an INTERNAL_VSYSCALL() macro that makes a vDSO call, falling back to a regular syscall, but without setting errno. Instead, the return value is plumbed straight out of the macro. Signed-off-by: Evan Green <evan@rivosinc.com> Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
* riscv: Add Linux hwprobe syscall supportEvan Green2024-03-016-2/+125
| | | | | | | | | | Add awareness and a thin wrapper function around a new Linux system call that allows callers to get architecture and microarchitecture information about the CPUs from the kernel. This can be used to do things like dynamically choose a memcpy implementation. Signed-off-by: Evan Green <evan@rivosinc.com> Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
* x86-64: Update _dl_tlsdesc_dynamic to preserve AMX registersH.J. Lu2024-02-297-0/+184
| | | | | | | | | | | | | | | | _dl_tlsdesc_dynamic should also preserve AMX registers which are caller-saved. Add X86_XSTATE_TILECFG_ID and X86_XSTATE_TILEDATA_ID to x86-64 TLSDESC_CALL_STATE_SAVE_MASK. Compute the AMX state size and save it in xsave_state_full_size which is only used by _dl_tlsdesc_dynamic_xsave and _dl_tlsdesc_dynamic_xsavec. This fixes the AMX part of BZ #31372. Tested on AMX processor. AMX test is enabled only for compilers with the fix for https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114098 GCC 14 and GCC 11/12/13 branches have the bug fix. Reviewed-by: Sunil K Pandey <skpgkp2@gmail.com>
* sysdeps/unix/sysv/linux/x86_64/Makefile: Add the end markerH.J. Lu2024-02-281-3/+6
| | | | Add the end marker to tests, tests-container and modules-names.
* S390: Do not clobber r7 in clone [BZ #31402]Stefan Liebler2024-02-263-12/+63
| | | | | | | | | | | | Starting with commit e57d8fc97b90127de4ed3e3a9cdf663667580935 "S390: Always use svc 0" clone clobbers the call-saved register r7 in error case: function or stack is NULL. This patch restores the saved registers also in the error case. Furthermore the existing test misc/tst-clone is extended to check all error cases and that clone does not clobber registers in this error case.
* tests: gracefully handle AppArmor userns containmentSimon Chopin2024-02-231-1/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | Recent AppArmor containment allows restricting unprivileged user namespaces, which is enabled by default on recent Ubuntu systems. When this happens, as is common with Linux Security Modules, the syscall will fail with -EACCESS. When that happens, the affected tests will now be considered unsupported rather than simply failing. Further information: * https://gitlab.com/apparmor/apparmor/-/wikis/unprivileged_userns_restriction * https://ubuntu.com/blog/ubuntu-23-10-restricted-unprivileged-user-namespaces * https://manpages.ubuntu.com/manpages/jammy/man5/apparmor.d.5.html (for the return code) V2: * Fix duplicated line in check_unshare_hints * Also handle similar failure in tst-pidfd_getpid V3: * Comment formatting * Aded some more documentation on syscall return value Signed-off-by: Simon Chopin <simon.chopin@canonical.com>
* Linux: Switch back to assembly syscall wrapper for prctl (bug 29770)Florian Weimer2024-02-172-4/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | Commit ff026950e280bc3e9487b41b460fb31bc5b57721 ("Add a C wrapper for prctl [BZ #25896]") replaced the assembler wrapper with a C function. However, on powerpc64le-linux-gnu, the C variadic function implementation requires extra work in the caller to set up the parameter save area. Calling a function that needs a parameter save area without one (because the prototype used indicates the function is not variadic) corrupts the caller's stack. The Linux manual pages project documents prctl as a non-variadic function. This has resulted in various projects over the years using non-variadic prototypes, including the sanitizer libraries in LLVm and GCC (GCC PR 113728). This commit switches back to the assembler implementation on most targets and only keeps the C implementation for x86-64 x32. Also add the __prctl_time64 alias from commit b39ffab860cd743a82c91946619f1b8158b0b65e ("Linux: Add time64 alias for prctl") to sysdeps/unix/sysv/linux/syscalls.list; it was not yet present in commit ff026950e280bc3e9487b41b460fb31bc5b57721. This restores the old ABI on powerpc64le-linux-gnu, thus fixing bug 29770. Reviewed-By: Simon Chopin <simon.chopin@canonical.com>
* Add SOL_VSOCK from Linux 6.7 to bits/socket.hJoseph Myers2024-02-081-0/+1
| | | | | | | | | Linux 6.7 adds a constant SOL_VSOCK (recall that various constants in include/linux/socket.h are in fact part of the kernel-userspace API despite that not being a uapi header). Add it to glibc's bits/socket.h. Tested for x86_64.
* Add new AArch64 HWCAP2 definitions from Linux 6.7 to bits/hwcap.hJoseph Myers2024-02-081-0/+3
| | | | | Linux 6.7 adds three new HWCAP2_* values for AArch64; add them to bits/hwcap.h in glibc.
* mips: FIx clone3 implementation (BZ 31325)Adhemerval Zanella2024-02-021-5/+27
| | | | | | | | | | | | | For o32 we need to setup a minimal stack frame to allow cprestore on __thread_start_clone3 (which instruct the linker to save the gp for PIC). Also, there is no guarantee by kABI that $8 will be preserved after syscall execution, so we need to save it on the provided stack. Checked on mipsel-linux-gnu. Reported-by: Khem Raj <raj.khem@gmail.com> Tested-by: Khem Raj <raj.khem@gmail.com>
* misc: tst-poll: Proper synchronize with child before sending the signalAdhemerval Zanella2024-02-011-3/+3
| | | | | | | | | | When running the testsuite in parallel, for instance running make -j $(nproc) check, occasionally tst-epoll fails with a timeout. It happens because it sometimes takes a bit more than 10ms for the process to get cloned and blocked by the syscall. In that case the signal is sent to early, and the test fails with a timeout. Checked on x86_64-linux-gnu.
* sh: Fix static build with --enable-fortifyAdhemerval Zanella2024-01-221-2/+2
| | | | | | | For static the internal symbols should not be prepended with the internal __GI_. Checked with a make check for sh4-linux-gnu.
* sparc64: Remove unwind information from signal return stubs [BZ#31244]Adhemerval Zanella2024-01-221-2/+5
| | | | | | | | | | | | | Similar to sparc32 fix, remove the unwind information on the signal return stubs. This fixes the regressions: FAIL: nptl/tst-cancel24-static FAIL: nptl/tst-cond8-static FAIL: nptl/tst-mutex8-static FAIL: nptl/tst-mutexpi8-static FAIL: nptl/tst-mutexpi9 On sparc64-linux-gnu.
* sparc: Remove unwind information from signal return stubs [BZ #31244]Daniel Cederman2024-01-181-4/+7
| | | | | | | | | | | | | | | | | | The functions were previously written in C, but were not compiled with unwind information. The ENTRY/END macros includes .cfi_startproc and .cfi_endproc which adds unwind information. This caused the tests cleanup-8 and cleanup-10 in the GCC testsuite to fail. This patch adds a version of the ENTRY/END macros without the CFI instructions that can be used instead. sigaction registers a restorer address that is located two instructions before the stub function. This patch adds a two instruction padding to avoid that the unwinder accesses the unwind information from the function that the linker has placed right before it in memory. This fixes an issue with pthread_cancel that caused tst-mutex8-static (and other tests) to fail. Signed-off-by: Daniel Cederman <cederman@gaisler.com> Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
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