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* Linux: Add ppoll fortify symbol for 64 bit time_t (BZ# 29746)Adhemerval Zanella2022-11-0822-2/+67
| | | | | | | | | | | | | | | | | | | | Similar to ppoll, the poll.h header needs to redirect the poll call to a proper fortified ppoll with 64 bit time_t support. The implementation is straightforward, just need to add a similar check as __poll_chk and call the 64 bit time_t ppoll version. The debug fortify tests are also extended to cover 64 bit time_t for affected ABIs. Unfortunately it requires an aditional symbol, which makes backport tricky. One possibility is to add a static inline version if compiler supports is and call abort instead of __chk_fail, so fortified version will call __poll64 in the end. Another possibility is to just remove the fortify support for _TIME_BITS=64. Checked on i686-linux-gnu.
* hurd: Add sigtimedwait and sigwaitinfo supportSamuel Thibault2022-11-073-112/+207
| | | | | This simply needed to add the timeout parameter to mach_msg, and copy information from struct hurd_signal_detail.
* x86_64: Implement evex512 version of strrchr and wcsrchrSunil K Pandey2022-11-035-0/+297
| | | | | | | | | | | | | | | | | | | | | | | | | | | Changes from v1: Use vec api for register. Replace VPCMP with VPCMPEQ Restructure and remove 1 unconditional jump. Change page cross logic to use sall. This patch implements following evex512 version of string functions. evex512 version takes up to 30% less cycle as compared to evex, depending on length and alignment. - strrchr function using 512 bit vectors. - wcsrchr function using 512 bit vectors. Code size data: strrchr-evex.o 879 byte strrchr-evex512.o 601 byte (-32%) wcsrchr-evex.o 882 byte wcsrchr-evex512.o 572 byte (-35%) Placeholder function, not used by any processor at the moment. Reviewed-by: Noah Goldstein <goldstein.w.n@gmail.com>
* elf: Introduce <dl-call_tls_init_tp.h> and call_tls_init_tp (bug 29249)Florian Weimer2022-11-0323-31/+60
| | | | | | | | This makes it more likely that the compiler can compute the strlen argument in _startup_fatal at compile time, which is required to avoid a dependency on strlen this early during process startup. Reviewed-by: Szabolcs Nagy <szabolcs.nagy@arm.com>
* elf: Rework exception handling in the dynamic loader [BZ #25486]Florian Weimer2022-11-0327-133/+7
| | | | | | | | | | | | | | | | | | | | | | | The old exception handling implementation used function interposition to replace the dynamic loader implementation (no TLS support) with the libc implementation (TLS support). This results in problems if the link order between the dynamic loader and libc is reversed (bug 25486). The new implementation moves the entire implementation of the exception handling functions back into the dynamic loader, using THREAD_GETMEM and THREAD_SETMEM for thread-local data support. These depends on Hurd support for these macros, added in commit b65a82e4e757c1e6cb7073916 ("hurd: Add THREAD_GET/SETMEM/_NC"). One small obstacle is that the exception handling facilities are used before the TCB has been set up, so a check is needed if the TCB is available. If not, a regular global variable is used to store the exception handling information. Also rename dl-error.c to dl-catch.c, to avoid confusion with the dlerror function. Reviewed-by: Siddhesh Poyarekar <siddhesh@sourceware.org>
* linux: Drop useless include from fstatat.cAurelien Jarno2022-11-021-2/+0
| | | | | | It is a left-over from previous refactorings. Reviewed by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
* linux: Fix fstatat on MIPSn64 (BZ #29730)Aurelien Jarno2022-11-021-0/+51
| | | | | | | | | | | | Commit 6e8a0aac2f883 ("time: Fix overflow itimer tests on 32-bit systems") changed in_time_t_range to assume a 32-bit time_t. This broke fstatat on MIPSn64 that was using it with a 64-bit time_t due to difference between stat and stat64. This commit fix that by adding a MIPSn64 specific version, which bypasses the EOVERFLOW tests. Resolves: BZ #29730 Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
* configure: Use -Wno-ignored-attributes if compiler warns about multiple aliasesAdhemerval Zanella2022-11-013-0/+10
| | | | | | | | | clang emits an warning when a double alias redirection is used, to warn the the original symbol will be used even when weak definition is overridden. However, this is a common pattern for weak_alias, where multiple alias are set to same symbol. Reviewed-by: Fangrui Song <maskray@google.com>
* Disable use of -fsignaling-nans if compiler does not support itAdhemerval Zanella2022-11-014-18/+18
| | | | Reviewed-by: Fangrui Song <maskray@google.com>
* Apply asm redirection in not-cancel before first useAdhemerval Zanella2022-11-011-15/+15
| | | | | | | It is avoid a build failure on clang where it can not redeclare function attribute after its first use. Reviewed-by: Fangrui Song <maskray@google.com>
* Fix build with GCC 13 _FloatN, _FloatNx built-in functionsJoseph Myers2022-10-317-5/+513
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | GCC 13 has added more _FloatN and _FloatNx versions of existing <math.h> and <complex.h> built-in functions, for use in libstdc++-v3. This breaks the glibc build because of how those functions are defined as aliases to functions with the same ABI but different types. Add appropriate -fno-builtin-* options for compiling relevant files, as already done for the case of long double functions aliasing double ones and based on the list of files used there. I fixed some mistakes in that list of double files that I noticed while implementing this fix, but there may well be more such (harmless) cases, in this list or the new one (files that don't actually exist or don't define the named functions as aliases so don't need the options). I did try to exclude cases where glibc doesn't define certain functions for _FloatN or _FloatNx types at all from the new uses of -fno-builtin-* options. As with the options for double files (see the commit message for commit 49348beafe9ba150c9bd48595b3f372299bddbb0, "Fix build with GCC 10 when long double = double."), it's deliberate that the options are used even if GCC currently doesn't have a built-in version of a given functions, so providing some level of future-proofing against more such built-in functions being added in future. Tested with build-many-glibcs.py for aarch64-linux-gnu powerpc-linux-gnu powerpc64le-linux-gnu x86_64-linux-gnu (compilers and glibcs builds) with GCC mainline.
* x86-64: Improve evex512 version of strlen functionsSunil K Pandey2022-10-301-34/+57
| | | | | | | | | | | This patch improves following functionality - Replace VPCMP with VPCMPEQ. - Replace page cross check logic with sall. - Remove extra lea from align_more. - Remove uncondition loop jump. - Use bsf to check max length in first vector. Reviewed-by: Noah Goldstein <goldstein.w.n@gmail.com>
* stdlib/strfrom: Add copysign to fix NAN issue on riscv (BZ #29501)Letu Ren2022-10-282-0/+68
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | According to the specification of ISO/IEC TS 18661-1:2014, The strfromd, strfromf, and strfroml functions are equivalent to snprintf(s, n, format, fp) (7.21.6.5), except the format string contains only the character %, an optional precision that does not contain an asterisk *, and one of the conversion specifiers a, A, e, E, f, F, g, or G, which applies to the type (double, float, or long double) indicated by the function suffix (rather than by a length modifier). Use of these functions with any other 20 format string results in undefined behavior. strfromf will convert the arguement with type float to double first. According to the latest version of IEEE754 which is published in 2019, Conversion of a quiet NaN from a narrower format to a wider format in the same radix, and then back to the same narrower format, should not change the quiet NaN payload in any way except to make it canonical. When either an input or result is a NaN, this standard does not interpret the sign of a NaN. However, operations on bit strings—copy, negate, abs, copySign—specify the sign bit of a NaN result, sometimes based upon the sign bit of a NaN operand. The logical predicates totalOrder and isSignMinus are also affected by the sign bit of a NaN operand. For all other operations, this standard does not specify the sign bit of a NaN result, even when there is only one input NaN, or when the NaN is produced from an invalid operation. converting NAN or -NAN with type float to double doesn't need to keep the signbit. As a result, this test case isn't mandatory. The problem is that according to RISC-V ISA manual in chapter 11.3 of riscv-isa-20191213, Except when otherwise stated, if the result of a floating-point operation is NaN, it is the canonical NaN. The canonical NaN has a positive sign and all significand bits clear except the MSB, a.k.a. the quiet bit. For single-precision floating-point, this corresponds to the pattern 0x7fc00000. which means that conversion -NAN from float to double won't keep the signbit. Since glibc ought to be consistent here between types and architectures, this patch adds copysign to fix this problem if the string is NAN. This patch adds two different functions under sysdeps directory to work around the issue. This patch has been tested on x86_64 and riscv64. Resolves: BZ #29501 v2: Change from macros to different inline functions. v3: Add unlikely check to isnan. v4: Fix wrong commit message header. v5: Fix style: add space before parentheses. v6: Add copyright. Signed-off-by: Letu Ren <fantasquex@gmail.com> Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
* aarch64: Fix the extension header write in getcontext and swapcontextSzabolcs Nagy2022-10-282-4/+4
| | | | | | The extension header is two 32bit words and in the last header both should be 0. There is plenty space in the __reserved area, but it's better not to write more than we mean to.
* aarch64: Don't build wordcopySzabolcs Nagy2022-10-281-0/+0
| | | | | | | Use an empty wordcopy.c to avoid building the generic one. It does not seem to be used anywhere. Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
* elf: Introduce to _dl_call_finiFlorian Weimer2022-10-271-0/+8
| | | | | | | | | | This consolidates the destructor invocations from _dl_fini and dlclose. Remove the micro-optimization that avoids calling _dl_call_fini if they are no destructors (as dlclose is quite expensive anyway). The debug log message is now printed unconditionally. Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
* ld.so: Export tls_init_tp_called as __rtld_tls_init_tp_calledFlorian Weimer2022-10-271-0/+3
| | | | | | | This allows the rest of dynamic loader to check whether the TCB has been set up (and THREAD_GETMEM and THREAD_SETMEM will work). Reviewed-by: Siddhesh Poyarekar <siddhesh@gotplt.org>
* aarch64: Use memcpy_simd as the default memcpyWilco Dijkstra2022-10-266-370/+81
| | | | | | Since __memcpy_simd is the fastest memcpy on almost all cores, replace the generic memcpy with it. If SVE is available, a SVE memcpy will be used by default (including for Neoverse N2).
* aarch64: Cleanup memset ifuncWilco Dijkstra2022-10-262-17/+26
| | | | | Cleanup memset ifunc selectors. The A64FX memset relies on a ZVA size of 256, so add an explicit check.
* x86_64: Implement evex512 version of strchrnul, strchr and wcschrSunil K Pandey2022-10-256-0/+322
| | | | | | | | | | | | | | | | | | | | | | | | | This patch implements following evex512 version of string functions. evex512 version takes up to 30% less cycle as compared to evex, depending on length and alignment. - strchrnul function using 512 bit vectors. - strchr function using 512 bit vectors. - wcschr function using 512 bit vectors. Code size data: strchrnul-evex.o 599 byte strchrnul-evex512.o 569 byte (-5%) strchr-evex.o 639 byte strchr-evex512.o 595 byte (-7%) wcschr-evex.o 644 byte wcschr-evex512.o 607 byte (-6%) Placeholder function, not used by any processor at the moment. Reviewed-by: Noah Goldstein <goldstein.w.n@gmail.com>
* linux: Fix generic struct_stat for 64 bit time (BZ# 29657)Adhemerval Zanella2022-10-256-74/+622
| | | | | | | | | | | | | | | | | The generic Linux struct_stat misses the conditionals to use bits/struct_stat_time64_helper.h in the __USE_TIME_BITS64 for architecture that uses __TIMESIZE == 32 (currently csky and nios2). Since newer ports should not support 32 bit time_t, the generic implementation should be used as default. For arm, hppa, and sh a copy of default struct_stat is added, while for csky and nios a new one based on generic is used, along with conditionals to use bits/struct_stat_time64_helper.h. The default struct_stat is also replaced with the generic one. Checked on aarch64-linux-gnu and arm-linux-gnueabihf.
* Avoid undefined behaviour in ibm128 implementation of llroundl (BZ #29488)Aurelien Jarno2022-10-241-12/+9
| | | | | | | | Detecting an overflow edge case depended on signed overflow of a long long. Replace the additions and the overflow checks by __builtin_add_overflow(). Reviewed-by: Tulio Magno Quites Machado Filho <tuliom@linux.ibm.com>
* Remove all assembly optimizations for htonl and htonsAdhemerval Zanella2022-10-245-175/+0
| | | | | | | | | | The builtin bswap is already used if optimziation is enabled for GCC 4.8+, so glibc symbols will be used in a very limited scenarios. Also, gcc generated code is quite similar to all but ia64 and i386 htons. Checked on alpha, i686, and ia64.
* Remove htonl.S for i386/x86_64Cristian Rodríguez2022-10-242-68/+0
| | | | | | | Generic implementation on top of __bswap_32 always expands inline to either bswap or movbe depending on -march=*. Signed-off-by: Cristian Rodríguez <crrodriguez@opensuse.org>
* Fix BZ #29463 in the ibm128 implementation of y1l tooMichael Hudson-Doyle2022-10-241-0/+3
| | | | | | | | | Avoid moving code across SET_RESTORE_ROUNDL in order to fix [BZ #29463]. Tested-by: Aurelien Jarno <aurelien@aurel32.net> Reviewed-by: Aurelien Jarno <aurelien@aurel32.net> Reviewed-by: Tulio Magno Quites Machado Filho <tuliom@linux.ibm.com>
* Add ADDRB from Linux 6.0 to bits/termios-c_cflag.hJoseph Myers2022-10-243-0/+12
| | | | | | | | | | | | Linux 6.0 adds a constant ADDRB, a termios c_cflag bit, to its include/uapi/asm-generic/termbits-common.h. Add it accordingly to glibc's bits/termios-c_cflag.h headers. As other constants in these headers are generally in octal, I converted the value to octal to match. As ADDRB isn't in a POSIX-reserved namespace, I made it conditional on __USE_MISC. Tested for x86_64.
* x86: Use `testb` for FSRM check in memmove-vec-unaligned-ermsNoah Goldstein2022-10-201-0/+4
| | | | | | | `testb` saves a bit of code size is the imm-operand can be encoded 1-bytes. Tested on x86-64.
* x86: Use `testb` for case-locale check in str{n}casecmp-sse42Noah Goldstein2022-10-201-2/+2
| | | | | | | `testb` saves a bit of code size is the imm-operand can be encoded 1-bytes. Tested on x86-64.
* x86: Use `testb` for case-locale check in str{n}casecmp-sse2Noah Goldstein2022-10-201-2/+2
| | | | | | | `testb` saves a bit of code size is the imm-operand can be encoded 1-bytes. Tested on x86-64.
* x86: Use `testb` for case-locale check in str{n}casecmp-avx2Noah Goldstein2022-10-201-1/+1
| | | | | | | `testb` saves a bit of code size is the imm-operand can be encoded 1-bytes. Tested on x86-64.
* x86: Add support for VEC_SIZE == 64 in strcmp-evex.S implNoah Goldstein2022-10-201-246/+438
| | | | | | | | | | | | | | | Unused at the moment, but evex512 strcmp, strncmp, strcasecmp{l}, and strncasecmp{l} functions can be added by including strcmp-evex.S with "x86-evex512-vecs.h" defined. In addition save code size a bit in a few places. 1. tzcnt ... -> bsf ... 2. vpcmp{b|d} $0 ... -> vpcmpeq{b|d} This saves a touch of code size but has minimal net affect. Full check passes on x86-64.
* x86: Remove AVX512-BVMI2 instruction from strrchr-evex.SNoah Goldstein2022-10-201-40/+29
| | | | | | | | | | | | | | | | commit b412213eee0afa3b51dfe92b736dfc7c981309f5 Author: Noah Goldstein <goldstein.w.n@gmail.com> Date: Tue Oct 18 17:44:07 2022 -0700 x86: Optimize strrchr-evex.S and implement with VMM headers Added `vpcompress{b|d}` to the page-cross logic with is an AVX512-VBMI2 instruction. This is not supported on SKX. Since the page-cross logic is relatively cold and the benefit is minimal revert the page-cross case back to the old logic which is supported on SKX. Tested on x86-64.
* sysdeps: arm: Fix preconfigure script for ARMv8/v9 targets [BZ #29698]Felix Riemann2022-10-202-2/+2
| | | | | | | | | | | | | | | | | | | | The ARM preconfigure script tries to detect the capabilities of the target platform by checking the compiler's predefined architecture macros. However, if the compiler is tuning for AArch32 on ARMv8/v9 this step fails: checking for sysdeps preconfigure fragments... aarch64 alpha arc arm WARNING: arm/preconfigure: Did not find ARM architecture type; using default This is because preconfigure.ac doesn't escape the square brackets in the glob for matching compilers targeting ARMv8. Adding another pair of brackets to escape the first pair fixes this: checking for sysdeps preconfigure fragments... aarch64 alpha arc arm Found compiler is configured for something newer than v7 - using v7 Signed-off-by: Felix Riemann <felix.riemann@sma.de> Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
* linux: Avoid shifting a negative signed on POSIX timer interfaceAdhemerval Zanella2022-10-204-9/+27
| | | | | | | | | | The current macros uses pid as signed value, which triggers a compiler warning for process and thread timers. Replace MAKE_PROCESS_CPUCLOCK with static inline function that expects the pid as unsigned. These are similar to what Linux does internally. Checked on x86_64-linux-gnu. Reviewed-by: Arjun Shankar <arjun@redhat.com>
* x86: Optimize strrchr-evex.S and implement with VMM headersNoah Goldstein2022-10-191-171/+200
| | | | | | | | | | | | | | | | | | | | | Optimization is: 1. Cache latest result in "fast path" loop with `vmovdqu` instead of `kunpckdq`. This helps if there are more than one matches. Code Size Changes: strrchr-evex.S : +30 bytes (Same number of cache lines) Net perf changes: Reported as geometric mean of all improvements / regressions from N=10 runs of the benchtests. Value as New Time / Old Time so < 1.0 is improvement and 1.0 is regression. strrchr-evex.S : 0.932 (From cases with higher match frequency) Full results attached in email. Full check passes on x86-64.
* x86: Optimize memrchr-evex.SNoah Goldstein2022-10-191-214/+324
| | | | | | | | | | | | | | | | | | | | | | | | | Optimizations are: 1. Use the fact that lzcnt(0) -> VEC_SIZE for memchr to save a branch in short string case. 2. Save several instructions in len = [VEC_SIZE, 4 * VEC_SIZE] case. 3. Use more code-size efficient instructions. - tzcnt ... -> bsf ... - vpcmpb $0 ... -> vpcmpeq ... Code Size Changes: memrchr-evex.S : -29 bytes Net perf changes: Reported as geometric mean of all improvements / regressions from N=10 runs of the benchtests. Value as New Time / Old Time so < 1.0 is improvement and 1.0 is regression. memrchr-evex.S : 0.949 (Mostly from improvements in small strings) Full results attached in email. Full check passes on x86-64.
* x86: Optimize strnlen-evex.S and implement with VMM headersNoah Goldstein2022-10-193-404/+572
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Optimizations are: 1. Use the fact that bsf(0) leaves the destination unchanged to save a branch in short string case. 2. Restructure code so that small strings are given the hot path. - This is a net-zero on the benchmark suite but in general makes sense as smaller sizes are far more common. 3. Use more code-size efficient instructions. - tzcnt ... -> bsf ... - vpcmpb $0 ... -> vpcmpeq ... 4. Align labels less aggressively, especially if it doesn't save fetch blocks / causes the basic-block to span extra cache-lines. The optimizations (especially for point 2) make the strnlen and strlen code essentially incompatible so split strnlen-evex to a new file. Code Size Changes: strlen-evex.S : -23 bytes strnlen-evex.S : -167 bytes Net perf changes: Reported as geometric mean of all improvements / regressions from N=10 runs of the benchtests. Value as New Time / Old Time so < 1.0 is improvement and 1.0 is regression. strlen-evex.S : 0.992 (No real change) strnlen-evex.S : 0.947 Full results attached in email. Full check passes on x86-64.
* x86: Shrink / minorly optimize strchr-evex and implement with VMM headersNoah Goldstein2022-10-191-218/+340
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Size Optimizations: 1. Condence hot path for better cache-locality. - This is most impact for strchrnul where the logic strings with len <= VEC_SIZE or with a match in the first VEC no fits entirely in the first cache line. 2. Reuse common targets in first 4x VEC and after the loop. 3. Don't align targets so aggressively if it doesn't change the number of fetch blocks it will require and put more care in avoiding the case where targets unnecessarily split cache lines. 4. Align the loop better for DSB/LSD 5. Use more code-size efficient instructions. - tzcnt ... -> bsf ... - vpcmpb $0 ... -> vpcmpeq ... 6. Align labels less aggressively, especially if it doesn't save fetch blocks / causes the basic-block to span extra cache-lines. Code Size Changes: strchr-evex.S : -63 bytes strchrnul-evex.S: -48 bytes Net perf changes: Reported as geometric mean of all improvements / regressions from N=10 runs of the benchtests. Value as New Time / Old Time so < 1.0 is improvement and 1.0 is regression. strchr-evex.S (Fixed) : 0.971 strchr-evex.S (Rand) : 0.932 strchrnul-evex.S : 0.965 Full results attached in email. Full check passes on x86-64.
* x86: Optimize memchr-evex.S and implement with VMM headersNoah Goldstein2022-10-193-410/+851
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Optimizations are: 1. Use the fact that tzcnt(0) -> VEC_SIZE for memchr to save a branch in short string case. 2. Restructure code so that small strings are given the hot path. - This is a net-zero on the benchmark suite but in general makes sense as smaller sizes are far more common. 3. Use more code-size efficient instructions. - tzcnt ... -> bsf ... - vpcmpb $0 ... -> vpcmpeq ... 4. Align labels less aggressively, especially if it doesn't save fetch blocks / causes the basic-block to span extra cache-lines. The optimizations (especially for point 2) make the memchr and rawmemchr code essentially incompatible so split rawmemchr-evex to a new file. Code Size Changes: memchr-evex.S : -107 bytes rawmemchr-evex.S : -53 bytes Net perf changes: Reported as geometric mean of all improvements / regressions from N=10 runs of the benchtests. Value as New Time / Old Time so < 1.0 is improvement and 1.0 is regression. memchr-evex.S : 0.928 rawmemchr-evex.S : 0.986 (Less targets cross cache lines) Full results attached in email. Full check passes on x86-64.
* x86_64: Implement evex512 version of memchr, rawmemchr and wmemchrSunil K Pandey2022-10-186-0/+346
| | | | | | | | | | | | | | | | | | | | | | | | | This patch implements following evex512 version of string functions. evex512 version takes up to 30% less cycle as compared to evex, depending on length and alignment. - memchr function using 512 bit vectors. - rawmemchr function using 512 bit vectors. - wmemchr function using 512 bit vectors. Code size data: memchr-evex.o 762 byte memchr-evex512.o 576 byte (-24%) rawmemchr-evex.o 461 byte rawmemchr-evex512.o 412 byte (-11%) wmemchr-evex.o 794 byte wmemchr-evex512.o 552 byte (-30%) Placeholder function, not used by any processor at the moment. Reviewed-by: Noah Goldstein <goldstein.w.n@gmail.com>
* Use PTR_MANGLE and PTR_DEMANGLE unconditionally in C sourcesFlorian Weimer2022-10-1822-46/+12
| | | | | | | | | | | | | | | | | In the future, this will result in a compilation failure if the macros are unexpectedly undefined (due to header inclusion ordering or header inclusion missing altogether). Assembler sources are more difficult to convert. In many cases, they are hand-optimized for the mangling and no-mangling variants, which is why they are not converted. sysdeps/s390/s390-32/__longjmp.c and sysdeps/s390/s390-64/__longjmp.c are special: These are C sources, but most of the implementation is in assembler, so the PTR_DEMANGLE macro has to be undefined in some cases, to match the assembler style. Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
* Introduce <pointer_guard.h>, extracted from <sysdep.h>Florian Weimer2022-10-18102-509/+911
| | | | | | | | | | | | | | This allows us to define a generic no-op version of PTR_MANGLE and PTR_DEMANGLE. In the future, we can use PTR_MANGLE and PTR_DEMANGLE unconditionally in C sources, avoiding an unintended loss of hardening due to missing include files or unlucky header inclusion ordering. In i386 and x86_64, we can avoid a <tls.h> dependency in the C code by using the computed constant from <tcb-offsets.h>. <sysdep.h> no longer includes these definitions, so there is no cyclic dependency anymore when computing the <tcb-offsets.h> constants. Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
* x86-64: Move LP_SIZE definition to its own headerFlorian Weimer2022-10-184-11/+48
| | | | | | | | | This way, we can define the pointer guard macros without including <sysdep.h> on x86-64. Other architectures will not have such an inclusion dependency, and the implied header file inclusion would create a porting hazard. Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
* math: Fix asin and acos invalid exception with old gccSzabolcs Nagy2022-10-171-16/+2
| | | | | | | | | | | | | | This works around a gcc issue where it const folded inf/inf into nan, preventing the invalid exception to be signalled. (x-x)/(x-x) is more robust against optimizations and works for all out of bounds values including x==nan. The gcc issue https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95115 should be fixed on release branches starting from gcc-10, but it is better to change the code in case glibc is built with older gcc. Reviewed-by: Wilco Dijkstra <Wilco.Dijkstra@arm.com>
* x86: Update strlen-evex-base to use new reg/vec macros.Noah Goldstein2022-10-142-76/+44
| | | | | | | | | | To avoid duplicate the VMM / GPR / mask insn macros in all incoming evex512 files use the macros defined in 'reg-macros.h' and '{vec}-macros.h' This commit does not change libc.so Tested build on x86-64
* x86: Remove now unused vec header macros.Noah Goldstein2022-10-147-328/+0
| | | | | | This commit does not change libc.so Tested build on x86-64
* x86: Update memset to use new VEC macrosNoah Goldstein2022-10-146-99/+43
| | | | | | | | Replace %VEC(n) -> %VMM(n) This commit does not change libc.so Tested build on x86-64
* x86: Update memmove to use new VEC macrosNoah Goldstein2022-10-146-221/+132
| | | | | | | | Replace %VEC(n) -> %VMM(n) This commit does not change libc.so Tested build on x86-64
* x86: Update memrchr to use new VEC macrosNoah Goldstein2022-10-141-21/+21
| | | | | | | | Replace %VEC(n) -> %VMM(n) This commit does not change libc.so Tested build on x86-64
* x86: Update VEC macros to complete API for evex/evex512 implsNoah Goldstein2022-10-149-0/+635
| | | | | | | | | | | | | | | | | | | | | | | 1) Copy so that backport will be easier. 2) Make section only define if there is not a previous definition 3) Add `VEC_lo` definition for proper reg-width but in the ymm/zmm0-15 range. 4) Add macros for accessing GPRs based on VEC_SIZE This is to make it easier to do think like: ``` vpcmpb %VEC(0), %VEC(1), %k0 kmov{d|q} %k0, %{eax|rax} test %{eax|rax} ``` It adds macro s.t any GPR can get the proper width with: `V{upcase_GPR_name}` and any mask insn can get the proper width with: `{upcase_mask_insn_without_postfix}` This commit does not change libc.so Tested build on x86-64
generated by cgit-pink 1.4.1 (git 2.36.1) at 2024-11-08 10:13:43 +0000