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* AArch64: Fix typo in sve configure check (BZ# 29394)Wilco Dijkstra2022-08-112-4/+4
| | | | Fix a typo in the SVE configure check. This fixes [BZ# 29394].
* libio: Improve performance of IO locksWilco Dijkstra2022-08-111-9/+19
| | | | | | | | | | | | Improve performance of recursive IO locks by adding a fast path for the single-threaded case. To reduce the number of memory accesses for locking/unlocking, only increment the recursion counter if the lock is already taken. On Neoverse V1, a microbenchmark with many small freads improved by 2.9x. Multithreaded performance improved by 2%. Reviewed-by: Cristian Rodríguez <crrodriguez@opensuse.org>
* tst-process_madvise: Check process_madvise-syscall support.Stefan Liebler2022-08-111-2/+5
| | | | | | | | | | | | So far this test checks if pidfd_open-syscall is supported, which was introduced with linux 5.3. The process_madvise-syscall was introduced with linux 5.10. Thus you'll get FAILs if you are running a kernel in between. This patch adds a check if the first process_madvise-syscall returns ENOSYS and in this case will fail with UNSUPPORTED. Reviewed-by: Florian Weimer <fweimer@redhat.com>
* x86: Fix `#define STRCPY` guard in strcpy-sse2.SNoah Goldstein2022-08-091-1/+1
| | | | | | `#ifndef STPCPY` is incorrect for checking if `STRCPY` is already defined. It doesn't end up mattering as the whole check is guarded by `#if IS_IN (libc)` but is incorrect none the less.
* i386: Use cmpl instead of cmpAdhemerval Zanella2022-08-052-12/+12
| | | | Clang cannot assemble cmp in the AT&T dialect mode.
* i386: Use fldt instead of fld on e_logl.SAdhemerval Zanella2022-08-051-2/+2
| | | | Clang cannot assemble fldt in the AT&T dialect mode.
* i386: Replace movzx with movzblFangrui Song2022-08-041-18/+18
| | | | | | | | Similar to 6720d36b6623c5e48c070d86acf61198b33e144e for x86-64. Clang cannot assemble movzx in the AT&T dialect mode. Change movzx to movzbl, which follows the AT&T dialect and is used elsewhere in the file.
* i386: Remove RELA supportAdhemerval Zanella2022-08-042-197/+1
| | | | | Now that prelink is not support, there is no need to keep supporting rela for non bootstrap.
* arm: Remove RELA supportAdhemerval Zanella2022-08-042-106/+1
| | | | | Now that prelink is not support, there is no need to keep supporting rela for non bootstrap.
* Remove ldd libc4 supportAdhemerval Zanella2022-08-0412-134/+0
| | | | The older libc versions are obsolete for over twenty years now.
* Assume only FLAG_ELF_LIBC6 suportLucas A. M. Magalhaes2022-08-0412-268/+0
| | | | | | | | | | | The older libc versions are obsolete for over twenty years now. This patch removes the special flags for libc5 and libc4 and assumes that all libraries cached are libc6 compatible and use FLAG_ELF_LIBC6. Checked with a build for all affected architectures. Co-authored-by: Adhemerval Zanella <adhemerval.zanella@linaro.org> Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
* Remove left over LD_LIBRARY_VERSION usagesAdhemerval Zanella2022-08-045-11/+0
| | | | | The environment variable was removed by d2db60d8d830ef68c8d20a77ac3572d610aa40b1.
* Linux: Remove exit system call from _exitFlorian Weimer2022-08-041-1/+0
| | | | | | exit only terminates the current thread, not the whole process, so it is the wrong fallback system call in this context. All supported Linux versions implement the exit_group system call anyway.
* LoongArch: Add vdso support for gettimeofday.caiyinyu2022-08-042-0/+23
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* Update kernel version to 5.19 in header constant testsJoseph Myers2022-08-033-4/+4
| | | | | | | | | | This patch updates the kernel version in the tests tst-mman-consts.py, tst-mount-consts.py and tst-pidfd-consts.py to 5.18. (There are no new constants covered by these tests in 5.19, or in 5.17 or 5.18 in the case of tst-mount-consts.py that previously used version 5.16, that need any other header changes.) Tested with build-many-glibcs.py.
* nptl: Remove uses of assert_perrorFlorian Weimer2022-08-031-8/+3
| | | | | | | | __pthread_sigmask cannot actually fail with valid pointer arguments (it would need a really broken seccomp filter), and we do not check for errors elsewhere. Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
* stdio: Clean up __libc_message after unconditional abortFlorian Weimer2022-08-031-26/+21
| | | | | | | | | | | | Since commit ec2c1fcefb200c6cb7e09553f3c6af8815013d83 ("malloc: Abort on heap corruption, without a backtrace [BZ #21754]"), __libc_message always terminates the process. Since commit a289ea09ea843ced6e5277c2f2e63c357bc7f9a3 ("Do not print backtraces on fatal glibc errors"), the backtrace facility has been removed. Therefore, remove enum __libc_message_action and the action argument of __libc_message, and mark __libc_message as _No_return. Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
* Update syscall lists for Linux 5.19Joseph Myers2022-08-023-2/+4
| | | | | | | | | Linux 5.19 has no new syscalls, but enables memfd_secret in the uapi headers for RISC-V. Update the version number in syscall-names.list to reflect that it is still current for 5.19 and regenerate the arch-syscall.h headers with build-many-glibcs.py update-syscalls. Tested with build-many-glibcs.py.
* socket: Check lengths before advancing pointer in CMSG_NXTHDRArjun Shankar2022-08-023-22/+94
| | | | | | | | | | | | | | | | | The inline and library functions that the CMSG_NXTHDR macro may expand to increment the pointer to the header before checking the stride of the increment against available space. Since C only allows incrementing pointers to one past the end of an array, the increment must be done after a length check. This commit fixes that and includes a regression test for CMSG_FIRSTHDR and CMSG_NXTHDR. The Linux, Hurd, and generic headers are all changed. Tested on Linux on armv7hl, i686, x86_64, aarch64, ppc64le, and s390x. [BZ #28846] Reviewed-by: Siddhesh Poyarekar <siddhesh@sourceware.org>
* tst-pidfd.c: UNSUPPORTED if we get EPERM on valid pidfd_getfd callMark Wielaard2022-07-291-0/+7
| | | | | | | | pidfd_getfd can fail for a valid pidfd with errno EPERM for various reasons in a restricted environment. Use FAIL_UNSUPPORTED in that case. Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org> Reviewed-by: Carlos O'Donell <carlos@redhat.com>
* LoongArch: Add greg_t and gregset_t.caiyinyu2022-07-291-0/+3
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* LoongArch: Fix VDSO_HASH and VDSO_NAME.caiyinyu2022-07-291-2/+2
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* riscv: Update rv64 libm test ulpsDarius Rad2022-07-271-1/+1
| | | | | | Generated on a Microsemi Polarfire Icicle Kit running Linux version 5.15.32. Same ULPs were also produced on QEMU 5.2.0 running Linux 5.18.0.
* riscv: Update nofpu libm test ulpsDarius Rad2022-07-271-31/+39
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* arc4random: simplify design for better safetyJason A. Donenfeld2022-07-2726-2079/+14
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Rather than buffering 16 MiB of entropy in userspace (by way of chacha20), simply call getrandom() every time. This approach is doubtlessly slower, for now, but trying to prematurely optimize arc4random appears to be leading toward all sorts of nasty properties and gotchas. Instead, this patch takes a much more conservative approach. The interface is added as a basic loop wrapper around getrandom(), and then later, the kernel and libc together can work together on optimizing that. This prevents numerous issues in which userspace is unaware of when it really must throw away its buffer, since we avoid buffering all together. Future improvements may include userspace learning more from the kernel about when to do that, which might make these sorts of chacha20-based optimizations more possible. The current heuristic of 16 MiB is meaningless garbage that doesn't correspond to anything the kernel might know about. So for now, let's just do something conservative that we know is correct and won't lead to cryptographic issues for users of this function. This patch might be considered along the lines of, "optimization is the root of all evil," in that the much more complex implementation it replaces moves too fast without considering security implications, whereas the incremental approach done here is a much safer way of going about things. Once this lands, we can take our time in optimizing this properly using new interplay between the kernel and userspace. getrandom(0) is used, since that's the one that ensures the bytes returned are cryptographically secure. But on systems without it, we fallback to using /dev/urandom. This is unfortunate because it means opening a file descriptor, but there's not much of a choice. Secondly, as part of the fallback, in order to get more or less the same properties of getrandom(0), we poll on /dev/random, and if the poll succeeds at least once, then we assume the RNG is initialized. This is a rough approximation, as the ancient "non-blocking pool" initialized after the "blocking pool", not before, and it may not port back to all ancient kernels, though it does to all kernels supported by glibc (≥3.2), so generally it's the best approximation we can do. The motivation for including arc4random, in the first place, is to have source-level compatibility with existing code. That means this patch doesn't attempt to litigate the interface itself. It does, however, choose a conservative approach for implementing it. Cc: Adhemerval Zanella Netto <adhemerval.zanella@linaro.org> Cc: Florian Weimer <fweimer@redhat.com> Cc: Cristian Rodríguez <crrodriguez@opensuse.org> Cc: Paul Eggert <eggert@cs.ucla.edu> Cc: Mark Harris <mark.hsj@gmail.com> Cc: Eric Biggers <ebiggers@kernel.org> Cc: linux-crypto@vger.kernel.org Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com> Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
* LoongArch: Hard Float Supportcaiyinyu2022-07-2622-0/+2372
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* LoongArch: Build Infrastructurecaiyinyu2022-07-2615-0/+434
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* LoongArch: Add ABI Listscaiyinyu2022-07-2611-0/+3385
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* LoongArch: Linux ABIcaiyinyu2022-07-2617-0/+826
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* LoongArch: Linux Syscall Interfacecaiyinyu2022-07-268-0/+947
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* LoongArch: Atomic and Locking Routinescaiyinyu2022-07-261-0/+147
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* LoongArch: Generic <math.h> and soft-fp Routinescaiyinyu2022-07-265-0/+321
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* LoongArch: Thread-Local Storage Supportcaiyinyu2022-07-264-0/+249
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* LoongArch: ABI Implementationcaiyinyu2022-07-2618-0/+959
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* struct stat is not posix conformant on microblaze with __USE_FILE_OFFSET64Arnout Vandecappelle (Essensium/Mind)2022-07-251-1/+1
| | | | | | | | | | | Commit a06b40cdf5ba0d2ab4f9b4c77d21e45ff284fac7 updated stat.h to use __USE_XOPEN2K8 instead of __USE_MISC to add the st_atim, st_mtim and st_ctim members to struct stat. However, for microblaze, there are two definitions of struct stat, depending on the __USE_FILE_OFFSET64 macro. The second one was not updated. Change __USE_MISC to __USE_XOPEN2K8 in the __USE_FILE_OFFSET64 version of struct stat for microblaze.
* Linux: dirent/tst-readdir64-compat needs to use TEST_COMPAT (bug 27654)Florian Weimer2022-07-252-6/+8
| | | | | | | | | | | The hppa port starts libc at GLIBC_2.2, but has earlier symbol versions in other shared objects. This means that the compat symbol for readdir64 is not actually present in libc even though have-GLIBC_2.1.3 is defined as yes at the make level. Fixes commit 15e50e6c966fa0f26612602a95f0129543d9f9d5 ("Linux: dirent/tst-readdir64-compat can be a regular test") by mostly reverting it.
* s390x: Add optimized chacha20Adhemerval Zanella Netto2022-07-223-0/+624
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | It adds vectorized ChaCha20 implementation based on libgcrypt cipher/chacha20-s390x.S. The final state register clearing is omitted. On a z15 it shows the following improvements (using formatted bench-arc4random data): GENERIC MB/s ----------------------------------------------- arc4random [single-thread] 198.92 arc4random_buf(16) [single-thread] 244.49 arc4random_buf(32) [single-thread] 282.73 arc4random_buf(48) [single-thread] 286.64 arc4random_buf(64) [single-thread] 320.06 arc4random_buf(80) [single-thread] 297.43 arc4random_buf(96) [single-thread] 310.96 arc4random_buf(112) [single-thread] 308.10 arc4random_buf(128) [single-thread] 309.90 ----------------------------------------------- VX. MB/s ----------------------------------------------- arc4random [single-thread] 430.26 arc4random_buf(16) [single-thread] 735.14 arc4random_buf(32) [single-thread] 1029.99 arc4random_buf(48) [single-thread] 1206.76 arc4random_buf(64) [single-thread] 1311.92 arc4random_buf(80) [single-thread] 1378.74 arc4random_buf(96) [single-thread] 1445.06 arc4random_buf(112) [single-thread] 1484.32 arc4random_buf(128) [single-thread] 1517.30 ----------------------------------------------- Checked on s390x-linux-gnu.
* powerpc64: Add optimized chacha20Adhemerval Zanella Netto2022-07-226-0/+345
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | It adds vectorized ChaCha20 implementation based on libgcrypt cipher/chacha20-ppc.c. It targets POWER8 and it is used on default for LE. On a POWER8 it shows the following improvements (using formatted bench-arc4random data): POWER8 GENERIC MB/s ----------------------------------------------- arc4random [single-thread] 138.77 arc4random_buf(16) [single-thread] 174.36 arc4random_buf(32) [single-thread] 228.11 arc4random_buf(48) [single-thread] 252.31 arc4random_buf(64) [single-thread] 270.11 arc4random_buf(80) [single-thread] 278.97 arc4random_buf(96) [single-thread] 287.78 arc4random_buf(112) [single-thread] 291.92 arc4random_buf(128) [single-thread] 295.25 POWER8 MB/s ----------------------------------------------- arc4random [single-thread] 198.06 arc4random_buf(16) [single-thread] 278.79 arc4random_buf(32) [single-thread] 448.89 arc4random_buf(48) [single-thread] 551.09 arc4random_buf(64) [single-thread] 646.12 arc4random_buf(80) [single-thread] 698.04 arc4random_buf(96) [single-thread] 756.06 arc4random_buf(112) [single-thread] 784.12 arc4random_buf(128) [single-thread] 808.04 ----------------------------------------------- Checked on powerpc64-linux-gnu and powerpc64le-linux-gnu. Reviewed-by: Paul E. Murphy <murphyp@linux.ibm.com>
* x86: Add AVX2 optimized chacha20Adhemerval Zanella Netto2022-07-224-5/+356
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | It adds vectorized ChaCha20 implementation based on libgcrypt cipher/chacha20-amd64-avx2.S. It is used only if AVX2 is supported and enabled by the architecture. As for generic implementation, the last step that XOR with the input is omited. The final state register clearing is also omitted. On a Ryzen 9 5900X it shows the following improvements (using formatted bench-arc4random data): SSE MB/s ----------------------------------------------- arc4random [single-thread] 704.25 arc4random_buf(16) [single-thread] 1018.17 arc4random_buf(32) [single-thread] 1315.27 arc4random_buf(48) [single-thread] 1449.36 arc4random_buf(64) [single-thread] 1511.16 arc4random_buf(80) [single-thread] 1539.48 arc4random_buf(96) [single-thread] 1571.06 arc4random_buf(112) [single-thread] 1596.16 arc4random_buf(128) [single-thread] 1613.48 ----------------------------------------------- AVX2 MB/s ----------------------------------------------- arc4random [single-thread] 922.61 arc4random_buf(16) [single-thread] 1478.70 arc4random_buf(32) [single-thread] 2241.80 arc4random_buf(48) [single-thread] 2681.28 arc4random_buf(64) [single-thread] 2913.43 arc4random_buf(80) [single-thread] 3009.73 arc4random_buf(96) [single-thread] 3141.16 arc4random_buf(112) [single-thread] 3254.46 arc4random_buf(128) [single-thread] 3305.02 ----------------------------------------------- Checked on x86_64-linux-gnu.
* x86: Add SSE2 optimized chacha20Adhemerval Zanella Netto2022-07-223-0/+350
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | It adds vectorized ChaCha20 implementation based on libgcrypt cipher/chacha20-amd64-ssse3.S. It replaces the ROTATE_SHUF_2 (which uses pshufb) by ROTATE2 and thus making the original implementation SSE2. As for generic implementation, the last step that XOR with the input is omited. The final state register clearing is also omitted. On a Ryzen 9 5900X it shows the following improvements (using formatted bench-arc4random data): GENERIC MB/s ----------------------------------------------- arc4random [single-thread] 443.11 arc4random_buf(16) [single-thread] 552.27 arc4random_buf(32) [single-thread] 626.86 arc4random_buf(48) [single-thread] 649.81 arc4random_buf(64) [single-thread] 663.95 arc4random_buf(80) [single-thread] 674.78 arc4random_buf(96) [single-thread] 675.17 arc4random_buf(112) [single-thread] 680.69 arc4random_buf(128) [single-thread] 683.20 ----------------------------------------------- SSE MB/s ----------------------------------------------- arc4random [single-thread] 704.25 arc4random_buf(16) [single-thread] 1018.17 arc4random_buf(32) [single-thread] 1315.27 arc4random_buf(48) [single-thread] 1449.36 arc4random_buf(64) [single-thread] 1511.16 arc4random_buf(80) [single-thread] 1539.48 arc4random_buf(96) [single-thread] 1571.06 arc4random_buf(112) [single-thread] 1596.16 arc4random_buf(128) [single-thread] 1613.48 ----------------------------------------------- Checked on x86_64-linux-gnu.
* aarch64: Add optimized chacha20Adhemerval Zanella Netto2022-07-224-0/+382
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | It adds vectorized ChaCha20 implementation based on libgcrypt cipher/chacha20-aarch64.S. It is used as default and only little-endian is supported (BE uses generic code). As for generic implementation, the last step that XOR with the input is omited. The final state register clearing is also omitted. On a virtualized Linux on Apple M1 it shows the following improvements (using formatted bench-arc4random data): GENERIC MB/s ----------------------------------------------- arc4random [single-thread] 380.89 arc4random_buf(16) [single-thread] 500.73 arc4random_buf(32) [single-thread] 552.61 arc4random_buf(48) [single-thread] 566.82 arc4random_buf(64) [single-thread] 574.01 arc4random_buf(80) [single-thread] 581.02 arc4random_buf(96) [single-thread] 591.19 arc4random_buf(112) [single-thread] 592.29 arc4random_buf(128) [single-thread] 596.43 ----------------------------------------------- OPTIMIZED MB/s ----------------------------------------------- arc4random [single-thread] 569.60 arc4random_buf(16) [single-thread] 825.78 arc4random_buf(32) [single-thread] 987.03 arc4random_buf(48) [single-thread] 1042.39 arc4random_buf(64) [single-thread] 1075.50 arc4random_buf(80) [single-thread] 1094.68 arc4random_buf(96) [single-thread] 1130.16 arc4random_buf(112) [single-thread] 1129.58 arc4random_buf(128) [single-thread] 1137.91 ----------------------------------------------- Checked on aarch64-linux-gnu.
* stdlib: Add arc4random, arc4random_buf, and arc4random_uniform (BZ #4417)Adhemerval Zanella Netto2022-07-2244-13/+178
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The implementation is based on scalar Chacha20 with per-thread cache. It uses getrandom or /dev/urandom as fallback to get the initial entropy, and reseeds the internal state on every 16MB of consumed buffer. To improve performance and lower memory consumption the per-thread cache is allocated lazily on first arc4random functions call, and if the memory allocation fails getentropy or /dev/urandom is used as fallback. The cache is also cleared on thread exit iff it was initialized (so if arc4random is not called it is not touched). Although it is lock-free, arc4random is still not async-signal-safe (the per thread state is not updated atomically). The ChaCha20 implementation is based on RFC8439 [1], omitting the final XOR of the keystream with the plaintext because the plaintext is a stream of zeros. This strategy is similar to what OpenBSD arc4random does. The arc4random_uniform is based on previous work by Florian Weimer, where the algorithm is based on Jérémie Lumbroso paper Optimal Discrete Uniform Generation from Coin Flips, and Applications (2013) [2], who credits Donald E. Knuth and Andrew C. Yao, The complexity of nonuniform random number generation (1976), for solving the general case. The main advantage of this method is the that the unit of randomness is not the uniform random variable (uint32_t), but a random bit. It optimizes the internal buffer sampling by initially consuming a 32-bit random variable and then sampling byte per byte. Depending of the upper bound requested, it might lead to better CPU utilization. Checked on x86_64-linux-gnu, aarch64-linux, and powerpc64le-linux-gnu. Co-authored-by: Florian Weimer <fweimer@redhat.com> Reviewed-by: Yann Droneaud <ydroneaud@opteya.com> [1] https://datatracker.ietf.org/doc/html/rfc8439 [2] https://arxiv.org/pdf/1304.1916.pdf
* linux: return UNSUPPORTED from tst-mount if entering mount namespace failsMichael Hudson-Doyle2022-07-191-19/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Before this the test fails if run in a chroot by a non-root user: warning: could not become root outside namespace (Operation not permitted) ../sysdeps/unix/sysv/linux/tst-mount.c:36: numeric comparison failure left: 1 (0x1); from: errno right: 19 (0x13); from: ENODEV error: ../sysdeps/unix/sysv/linux/tst-mount.c:39: not true: fd != -1 error: ../sysdeps/unix/sysv/linux/tst-mount.c:46: not true: r != -1 error: ../sysdeps/unix/sysv/linux/tst-mount.c:48: not true: r != -1 ../sysdeps/unix/sysv/linux/tst-mount.c:52: numeric comparison failure left: 1 (0x1); from: errno right: 9 (0x9); from: EBADF error: ../sysdeps/unix/sysv/linux/tst-mount.c:55: not true: mfd != -1 ../sysdeps/unix/sysv/linux/tst-mount.c:58: numeric comparison failure left: 1 (0x1); from: errno right: 2 (0x2); from: ENOENT error: ../sysdeps/unix/sysv/linux/tst-mount.c:61: not true: r != -1 ../sysdeps/unix/sysv/linux/tst-mount.c:65: numeric comparison failure left: 1 (0x1); from: errno right: 2 (0x2); from: ENOENT error: ../sysdeps/unix/sysv/linux/tst-mount.c:68: not true: pfd != -1 error: ../sysdeps/unix/sysv/linux/tst-mount.c:75: not true: fd_tree != -1 ../sysdeps/unix/sysv/linux/tst-mount.c:88: numeric comparison failure left: 1 (0x1); from: errno right: 38 (0x26); from: ENOSYS error: 12 test failures Checking that the test can enter a new mount namespace is more correct than just checking the return value of support_become_root() as the test code changes the mount namespace it runs in so running it as root on a system that does not support mount namespaces should still skip. Also change the test to remove the unnecessary fork. Reviewed-by: Carlos O'Donell <carlos@redhat.com>
* x86: Add support to build st{p|r}{n}{cpy|cat} with explicit ISA levelNoah Goldstein2022-07-1630-158/+382
| | | | | | | | | | | | | | | | | | | | 1. Add default ISA level selection in non-multiarch/rtld implementations. 2. Add ISA level build guards to different implementations. - I.e strcpy-avx2.S which is ISA level 3 will only build if compiled ISA level <= 3. Otherwise there is no reason to include it as we will always use one of the ISA level 4 implementations (strcpy-evex.S). 3. Refactor the ifunc selector and ifunc implementation list to use the ISA level aware wrapper macros that allow functions below the compiled ISA level (with a guranteed replacement) to be skipped. Tested with and without multiarch on x86_64 for ISA levels: {generic, x86-64-v2, x86-64-v3, x86-64-v4} And m32 with and without multiarch.
* x86: Add support to build wcscpy with explicit ISA levelNoah Goldstein2022-07-168-12/+103
| | | | | | | | | | | | | | | | | | 1. Add ISA level build guards to different implementations. - wcscpy-ssse3.S is used as ISA level 2/3/4. - wcscpy-generic.c is only used at ISA level 1 and will only build if compiled with ISA level == 1. Otherwise there is no reason to include it as we will always use wcscpy-ssse3.S 2. Refactor the ifunc selector and ifunc implementation list to use the ISA level aware wrapper macros that allow functions below the compiled ISA level (with a guranteed replacement) to be skipped. Tested with and without multiarch on x86_64 for ISA levels: {generic, x86-64-v2, x86-64-v3, x86-64-v4} And m32 with and without multiarch.
* x86: Add support to build strcmp/strlen/strchr with explicit ISA levelNoah Goldstein2022-07-1688-618/+1157
| | | | | | | | | | | | | | | | | | | | 1. Add default ISA level selection in non-multiarch/rtld implementations. 2. Add ISA level build guards to different implementations. - I.e strcmp-avx2.S which is ISA level 3 will only build if compiled ISA level <= 3. Otherwise there is no reason to include it as we will always use one of the ISA level 4 implementations (strcmp-evex.S). 3. Refactor the ifunc selector and ifunc implementation list to use the ISA level aware wrapper macros that allow functions below the compiled ISA level (with a guranteed replacement) to be skipped. Tested with and without multiarch on x86_64 for ISA levels: {generic, x86-64-v2, x86-64-v3, x86-64-v4} And m32 with and without multiarch.
* S390: Define SINGLE_THREAD_BY_GLOBAL only on s390xStefan Liebler2022-07-141-0/+0
| | | | | | | | | | | | | | | | | | | | | | | | Starting with commit e070501d12b47e88c1ff8c313f887976fb578938 "Replace __libc_multiple_threads with __libc_single_threaded" the testcases nptl/tst-cancel-self and nptl/tst-cancel-self-cancelstate are failing. This is fixed by only defining SINGLE_THREAD_BY_GLOBAL on s390x, but not on s390. Starting with commit 09c76a74099826f4c6e1c4c431d7659f78112862 "Linux: Consolidate {RTLD_}SINGLE_THREAD_P definition", SINGLE_THREAD_BY_GLOBAL was defined in sysdeps/unix/sysv/linux/s390/s390-64/sysdep.h. Lateron the commit 9a973da617772eff1f351989f8995f4305a2e63c "s390: Consolidate Linux syscall definition" consolidates the sysdep.h files from s390-32/s390-64 subdirectories. Unfortunately the macro is now always defined instead of only on s390-64. As information: TLS_MULTIPLE_THREADS_IN_TCB is also only defined for s390. See: sysdeps/s390/nptl/tls.h
* x86: Add missing rtm tests for strcmp familyNoah Goldstein2022-07-136-2/+150
| | | | | | | | | | Add new tests for: strcasecmp strncasecmp strcmp wcscmp These functions all have avx2_rtm implementations so should be tested.
* x86: Remove unneeded rtld-wmemcmpNoah Goldstein2022-07-131-18/+0
| | | | | | | | | | wmemcmp isn't used by the dynamic loader so their no need to add an RTLD stub for it. Tested with and without multiarch on x86_64 for ISA levels: {generic, x86-64-v2, x86-64-v3, x86-64-v4} And m32 with and without multiarch.
* x86: Move wcslen SSE2 implementation to multiarch/wcslen-sse2.SNoah Goldstein2022-07-132-219/+218
| | | | | | | This commit doesn't affect libc.so.6, its just housekeeping to prepare for adding explicit ISA level support. Tested build on x86_64 and x86_32 with/without multiarch.
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