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2a969b53c0
glibc/sysdeps/x86
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Adhemerval Zanella 2a969b53c0 elf: Do not duplicate the GLIBC_TUNABLES string 
The tunable parsing duplicates the tunable environment variable so it
null-terminates each one since it simplifies the later parsing. It has
the drawback of adding another point of failure (__minimal_malloc
failing), and the memory copy requires tuning the compiler to avoid mem
operations calls.

The parsing now tracks the tunable start and its size. The
dl-tunable-parse.h adds helper functions to help parsing, like a strcmp
that also checks for size and an iterator for suboptions that are
comma-separated (used on hwcap parsing by x86, powerpc, and s390x).

Since the environment variable is allocated on the stack by the kernel,
it is safe to keep the references to the suboptions for later parsing
of string tunables (as done by set_hwcaps by multiple architectures).

Checked on x86_64-linux-gnu, powerpc64le-linux-gnu, and
aarch64-linux-gnu.
Reviewed-by: Siddhesh Poyarekar <siddhesh@sourceware.org>
2023-12-19 13:25:45 -03:00
..
bits x86: Add support for AVX10 preset and vec size in cpu-features 2023-09-29 14:18:42 -05:00
fpu Update copyright dates with scripts/update-copyrights 2023-01-06 21:14:39 +00:00
htl Fix a few more typos I missed in previous round -- BZ 25337 2023-06-02 23:46:32 +00:00
include x86: Add support for AVX10 preset and vec size in cpu-features 2023-09-29 14:18:42 -05:00
nptl Update copyright dates with scripts/update-copyrights 2023-01-06 21:14:39 +00:00
sys/platform Update copyright dates with scripts/update-copyrights 2023-01-06 21:14:39 +00:00
__longjmp_cancel.S Update copyright dates with scripts/update-copyrights 2023-01-06 21:14:39 +00:00
abi-note.c Update copyright dates with scripts/update-copyrights 2023-01-06 21:14:39 +00:00
atomic-machine.h Update copyright dates with scripts/update-copyrights 2023-01-06 21:14:39 +00:00
cacheinfo.c Update copyright dates with scripts/update-copyrights 2023-01-06 21:14:39 +00:00
cacheinfo.h Remove --enable-tunables configure option 2023-03-29 14:33:06 -03:00
cet-control.h Update copyright dates with scripts/update-copyrights 2023-01-06 21:14:39 +00:00
check-cet.awk Update copyright dates with scripts/update-copyrights 2023-01-06 21:14:39 +00:00
configure configure: Use autoconf 2.71 2023-07-17 10:08:10 -04:00
configure.ac x86_64: State assembler is being tested on sysdeps/x86/configure 2022-12-06 13:47:47 -03:00
cpu-features-offsets.sym x86: Cleanup cpu-features-offsets.sym 2018-08-03 06:42:09 -07:00
cpu-features.c x86: Add support for AVX10 preset and vec size in cpu-features 2023-09-29 14:18:42 -05:00
cpu-tunables.c elf: Do not duplicate the GLIBC_TUNABLES string 2023-12-19 13:25:45 -03:00
dl-cacheinfo.h x86: Check the lower byte of EAX of CPUID leaf 2 [BZ #30643] 2023-08-29 12:57:41 -07:00
dl-cet.c Update copyright dates with scripts/update-copyrights 2023-01-06 21:14:39 +00:00
dl-diagnostics-cpu.c x86: Make the divisor in setting non_temporal_threshold cpu specific 2023-06-12 11:33:39 -05:00
dl-get-cpu-features.c Update copyright dates with scripts/update-copyrights 2023-01-06 21:14:39 +00:00
dl-hwcap2.h x86: Set FSGSBASE to active if enabled by kernel 2023-04-03 11:36:48 -07:00
dl-hwcap.h Update copyright dates with scripts/update-copyrights 2023-01-06 21:14:39 +00:00
dl-isa-level.h Update copyright dates with scripts/update-copyrights 2023-01-06 21:14:39 +00:00
dl-lookupcfg.h Update copyright dates with scripts/update-copyrights 2023-01-06 21:14:39 +00:00
dl-minsigstacksize.h Update copyright dates with scripts/update-copyrights 2023-01-06 21:14:39 +00:00
dl-new-hash.h Update copyright dates with scripts/update-copyrights 2023-01-06 21:14:39 +00:00
dl-procinfo.c Update copyright dates with scripts/update-copyrights 2023-01-06 21:14:39 +00:00
dl-procinfo.h Update copyright dates with scripts/update-copyrights 2023-01-06 21:14:39 +00:00
dl-procruntime.c Update copyright dates with scripts/update-copyrights 2023-01-06 21:14:39 +00:00
dl-prop.h x86: Check PT_GNU_PROPERTY early 2023-12-11 11:05:46 -08:00
dl-tunables.list Update copyright dates with scripts/update-copyrights 2023-01-06 21:14:39 +00:00
elf-initfini.h Update copyright dates with scripts/update-copyrights 2023-01-06 21:14:39 +00:00
elide.h Update copyright dates with scripts/update-copyrights 2023-01-06 21:14:39 +00:00
float128-abi.h Move __isnanf128 to libc.so 2021-03-30 14:58:19 +05:30
fpu_control.h Update copyright dates with scripts/update-copyrights 2023-01-06 21:14:39 +00:00
get-cpuid-feature-leaf.c Update copyright dates with scripts/update-copyrights 2023-01-06 21:14:39 +00:00
get-isa-level.h Update copyright dates with scripts/update-copyrights 2023-01-06 21:14:39 +00:00
hp-timing.h Fix misspellings in sysdeps/ -- BZ 25337 2023-05-30 23:02:29 +00:00
init-arch.h Update copyright dates with scripts/update-copyrights 2023-01-06 21:14:39 +00:00
isa-ifunc-macros.h Update copyright dates with scripts/update-copyrights 2023-01-06 21:14:39 +00:00
isa-level.c Update copyright dates with scripts/update-copyrights 2023-01-06 21:14:39 +00:00
isa-level.h Update copyright dates with scripts/update-copyrights 2023-01-06 21:14:39 +00:00
jmp_buf-ssp.sym x86: Support shadow stack pointer in setjmp/longjmp 2018-07-14 05:59:53 -07:00
ldbl2mpn.c Update copyright dates with scripts/update-copyrights 2023-01-06 21:14:39 +00:00
ldsodefs.h Update copyright dates with scripts/update-copyrights 2023-01-06 21:14:39 +00:00
libc-start.c Update copyright dates with scripts/update-copyrights 2023-01-06 21:14:39 +00:00
libc-start.h Update copyright dates with scripts/update-copyrights 2023-01-06 21:14:39 +00:00
link_map.h Update copyright dates with scripts/update-copyrights 2023-01-06 21:14:39 +00:00
linkmap.h Rename bits/linkmap.h to linkmap.h (bug 14912). 2015-09-04 19:44:27 +00:00
longjmp.c Update copyright dates with scripts/update-copyrights 2023-01-06 21:14:39 +00:00
Makeconfig Add _Float64x function aliases. 2017-11-27 14:16:47 +00:00
Makefile elf: Do not duplicate the GLIBC_TUNABLES string 2023-12-19 13:25:45 -03:00
readelflib.c x86: Make dl-cache.h and readelflib.c not Linux-specific 2023-06-26 10:04:31 -03:00
sysdep.h Update copyright dates with scripts/update-copyrights 2023-01-06 21:14:39 +00:00
tininess.h Use sysdeps/x86/tininess.h for i386 and x86_64 2012-10-30 20:38:31 -07:00
tst-cet-legacy-1.c Update copyright dates with scripts/update-copyrights 2023-01-06 21:14:39 +00:00
tst-cet-legacy-1a.c Update copyright dates with scripts/update-copyrights 2023-01-06 21:14:39 +00:00
tst-cet-legacy-2.c Update copyright dates with scripts/update-copyrights 2023-01-06 21:14:39 +00:00
tst-cet-legacy-2a.c x86/CET: Add tests with legacy non-CET shared objects 2018-07-25 04:47:05 -07:00
tst-cet-legacy-3.c Update copyright dates with scripts/update-copyrights 2023-01-06 21:14:39 +00:00
tst-cet-legacy-4.c x86/cet: Check CPU_FEATURE_ACTIVE in permissive mode 2023-12-19 06:58:05 -08:00
tst-cet-legacy-4a.c x86/CET: Add tests with legacy non-CET shared objects 2018-07-25 04:47:05 -07:00
tst-cet-legacy-4b.c x86/CET: Add tests with legacy non-CET shared objects 2018-07-25 04:47:05 -07:00
tst-cet-legacy-4c.c x86/CET: Add tests with legacy non-CET shared objects 2018-07-25 04:47:05 -07:00
tst-cet-legacy-5.c Update copyright dates with scripts/update-copyrights 2023-01-06 21:14:39 +00:00
tst-cet-legacy-5a.c Call _dl_open_check after relocation [BZ #24259] 2019-07-01 12:23:22 -07:00
tst-cet-legacy-5b.c Call _dl_open_check after relocation [BZ #24259] 2019-07-01 12:23:22 -07:00
tst-cet-legacy-6.c Update copyright dates with scripts/update-copyrights 2023-01-06 21:14:39 +00:00
tst-cet-legacy-6a.c Call _dl_open_check after relocation [BZ #24259] 2019-07-01 12:23:22 -07:00
tst-cet-legacy-6b.c Call _dl_open_check after relocation [BZ #24259] 2019-07-01 12:23:22 -07:00
tst-cet-legacy-7.c Update copyright dates with scripts/update-copyrights 2023-01-06 21:14:39 +00:00
tst-cet-legacy-8.c x86/cet: Don't assume that SHSTK implies IBT 2023-12-18 07:04:18 -08:00
tst-cet-legacy-9-static.c x86: Properly set usable CET feature bits [BZ #26625] 2021-01-29 03:58:11 -08:00
tst-cet-legacy-9.c Update copyright dates with scripts/update-copyrights 2023-01-06 21:14:39 +00:00
tst-cet-legacy-10-static.c x86: Properly set usable CET feature bits [BZ #26625] 2021-01-29 03:58:11 -08:00
tst-cet-legacy-10.c x86/cet: Don't assume that SHSTK implies IBT 2023-12-18 07:04:18 -08:00
tst-cet-legacy-10a-static.c x86/cet: Check CPU_FEATURE_ACTIVE when CET is disabled 2023-12-19 06:57:32 -08:00
tst-cet-legacy-10a.c x86/cet: Check CPU_FEATURE_ACTIVE when CET is disabled 2023-12-19 06:57:32 -08:00
tst-cet-legacy-mod-1.c Update copyright dates with scripts/update-copyrights 2023-01-06 21:14:39 +00:00
tst-cet-legacy-mod-2.c Update copyright dates with scripts/update-copyrights 2023-01-06 21:14:39 +00:00
tst-cet-legacy-mod-4.c x86/CET: Add tests with legacy non-CET shared objects 2018-07-25 04:47:05 -07:00
tst-cet-legacy-mod-5.c Update copyright dates with scripts/update-copyrights 2023-01-06 21:14:39 +00:00
tst-cet-legacy-mod-5a.c Call _dl_open_check after relocation [BZ #24259] 2019-07-01 12:23:22 -07:00
tst-cet-legacy-mod-5b.c Call _dl_open_check after relocation [BZ #24259] 2019-07-01 12:23:22 -07:00
tst-cet-legacy-mod-5c.c Update copyright dates with scripts/update-copyrights 2023-01-06 21:14:39 +00:00
tst-cet-legacy-mod-6.c Update copyright dates with scripts/update-copyrights 2023-01-06 21:14:39 +00:00
tst-cet-legacy-mod-6a.c Call _dl_open_check after relocation [BZ #24259] 2019-07-01 12:23:22 -07:00
tst-cet-legacy-mod-6b.c Call _dl_open_check after relocation [BZ #24259] 2019-07-01 12:23:22 -07:00
tst-cet-legacy-mod-6c.c Update copyright dates with scripts/update-copyrights 2023-01-06 21:14:39 +00:00
tst-cet-legacy-mod-6d.c Call _dl_open_check after relocation [BZ #24259] 2019-07-01 12:23:22 -07:00
tst-cpu-features-cpuinfo-static.c x86: Add PTWRITE feature detection [BZ #27346] 2021-02-07 08:01:14 -08:00
tst-cpu-features-cpuinfo.c x86/cet: Check user_shstk in /proc/cpuinfo 2023-12-17 10:42:06 -08:00
tst-cpu-features-supports-static.c x86: Add PTWRITE feature detection [BZ #27346] 2021-02-07 08:01:14 -08:00
tst-cpu-features-supports.c Update copyright dates with scripts/update-copyrights 2023-01-06 21:14:39 +00:00
tst-get-cpu-features-static.c Add _dl_x86_cpu_features to rtld_global 2015-08-13 03:41:22 -07:00
tst-get-cpu-features.c x86: Add support for AVX10 preset and vec size in cpu-features 2023-09-29 14:18:42 -05:00
tst-hwcap-tunables.c elf: Do not duplicate the GLIBC_TUNABLES string 2023-12-19 13:25:45 -03:00
tst-ifunc-isa-1-static.c x86: Check ifunc resolver with CPU_FEATURE_USABLE [BZ #27072] 2021-01-21 10:22:26 -08:00
tst-ifunc-isa-1.c Update copyright dates with scripts/update-copyrights 2023-01-06 21:14:39 +00:00
tst-ifunc-isa-2-static.c x86: Check ifunc resolver with CPU_FEATURE_USABLE [BZ #27072] 2021-01-21 10:22:26 -08:00
tst-ifunc-isa-2.c Update copyright dates with scripts/update-copyrights 2023-01-06 21:14:39 +00:00
tst-ifunc-isa.h Update copyright dates with scripts/update-copyrights 2023-01-06 21:14:39 +00:00
tst-isa-level-1.c Update copyright dates with scripts/update-copyrights 2023-01-06 21:14:39 +00:00
tst-isa-level-mod-1-baseline.c x86: Support GNU_PROPERTY_X86_ISA_1_V[234] marker [BZ #26717] 2021-01-07 13:10:13 -08:00
tst-isa-level-mod-1-v2.c x86: Support GNU_PROPERTY_X86_ISA_1_V[234] marker [BZ #26717] 2021-01-07 13:10:13 -08:00
tst-isa-level-mod-1-v3.c x86: Support GNU_PROPERTY_X86_ISA_1_V[234] marker [BZ #26717] 2021-01-07 13:10:13 -08:00
tst-isa-level-mod-1-v4.c x86: Support GNU_PROPERTY_X86_ISA_1_V[234] marker [BZ #26717] 2021-01-07 13:10:13 -08:00
tst-isa-level-mod-1.c Update copyright dates with scripts/update-copyrights 2023-01-06 21:14:39 +00:00
tst-ldbl-nonnormal-printf.c Update copyright dates with scripts/update-copyrights 2023-01-06 21:14:39 +00:00
tst-memchr-rtm.c Update copyright dates with scripts/update-copyrights 2023-01-06 21:14:39 +00:00
tst-memcmp-rtm.c Update copyright dates with scripts/update-copyrights 2023-01-06 21:14:39 +00:00
tst-memmove-rtm.c Update copyright dates with scripts/update-copyrights 2023-01-06 21:14:39 +00:00
tst-memrchr-rtm.c Update copyright dates with scripts/update-copyrights 2023-01-06 21:14:39 +00:00
tst-memset-rtm.c Update copyright dates with scripts/update-copyrights 2023-01-06 21:14:39 +00:00
tst-setjmp-cet.c x86: Set header.feature_1 in TCB for always-on CET [BZ #27177] 2021-01-13 05:03:34 -08:00
tst-shstk-legacy-1-extra.S x86/cet: Check legacy shadow stack applications 2023-12-19 06:57:27 -08:00
tst-shstk-legacy-1a-static.c x86/cet: Check legacy shadow stack applications 2023-12-19 06:57:27 -08:00
tst-shstk-legacy-1a.c x86/cet: Check legacy shadow stack applications 2023-12-19 06:57:27 -08:00
tst-shstk-legacy-1b-static.c x86/cet: Check legacy shadow stack applications 2023-12-19 06:57:27 -08:00
tst-shstk-legacy-1b.c x86/cet: Check legacy shadow stack applications 2023-12-19 06:57:27 -08:00
tst-shstk-legacy-1c-static.c x86/cet: Add tests for GLIBC_TUNABLES=glibc.cpu.hwcaps=-SHSTK 2023-12-19 06:57:39 -08:00
tst-shstk-legacy-1c.c x86/cet: Add tests for GLIBC_TUNABLES=glibc.cpu.hwcaps=-SHSTK 2023-12-19 06:57:39 -08:00
tst-shstk-legacy-1d-static.c x86/cet: Check legacy shadow stack code in .init_array section 2023-12-19 06:57:47 -08:00
tst-shstk-legacy-1d.c x86/cet: Check legacy shadow stack code in .init_array section 2023-12-19 06:57:47 -08:00
tst-shstk-legacy-1e-static.c x86/cet: Check legacy shadow stack code in .init_array section 2023-12-19 06:57:47 -08:00
tst-shstk-legacy-1e-static.sh x86/cet: Check legacy shadow stack code in .init_array section 2023-12-19 06:57:47 -08:00
tst-shstk-legacy-1e.c x86/cet: Check legacy shadow stack code in .init_array section 2023-12-19 06:57:47 -08:00
tst-shstk-legacy-1e.sh x86/cet: Check legacy shadow stack code in .init_array section 2023-12-19 06:57:47 -08:00
tst-shstk-legacy-1f.c x86/cet: Check legacy shadow stack code in .init_array section 2023-12-19 06:57:47 -08:00
tst-shstk-legacy-1g.c x86/cet: Check legacy shadow stack code in .init_array section 2023-12-19 06:57:47 -08:00
tst-shstk-legacy-1g.sh x86/cet: Check legacy shadow stack code in .init_array section 2023-12-19 06:57:47 -08:00
tst-shstk-legacy-mod-1.c x86/cet: Check legacy shadow stack code in .init_array section 2023-12-19 06:57:47 -08:00
tst-stack-align.h Update copyright dates with scripts/update-copyrights 2023-01-06 21:14:39 +00:00
tst-strcasecmp-rtm.c Update copyright dates with scripts/update-copyrights 2023-01-06 21:14:39 +00:00
tst-strchr-rtm.c Update copyright dates with scripts/update-copyrights 2023-01-06 21:14:39 +00:00
tst-strcmp-rtm.c Update copyright dates with scripts/update-copyrights 2023-01-06 21:14:39 +00:00
tst-strcpy-rtm.c Update copyright dates with scripts/update-copyrights 2023-01-06 21:14:39 +00:00
tst-string-rtm.h Update copyright dates with scripts/update-copyrights 2023-01-06 21:14:39 +00:00
tst-strlen-rtm.c Update copyright dates with scripts/update-copyrights 2023-01-06 21:14:39 +00:00
tst-strncasecmp-rtm.c Update copyright dates with scripts/update-copyrights 2023-01-06 21:14:39 +00:00
tst-strncmp-rtm.c Update copyright dates with scripts/update-copyrights 2023-01-06 21:14:39 +00:00
tst-strrchr-rtm.c Update copyright dates with scripts/update-copyrights 2023-01-06 21:14:39 +00:00
tst-sysconf-cache-linesize-static.c x86: Handle _SC_LEVEL1_ICACHE_LINESIZE [BZ #27444] 2021-03-15 05:43:26 -07:00
tst-sysconf-cache-linesize.c Update copyright dates with scripts/update-copyrights 2023-01-06 21:14:39 +00:00
tst-wcscmp-rtm.c Update copyright dates with scripts/update-copyrights 2023-01-06 21:14:39 +00:00
tst-wcsncmp-rtm.c Update copyright dates with scripts/update-copyrights 2023-01-06 21:14:39 +00:00
Versions <sys/platform/x86.h>: Remove the C preprocessor magic 2021-01-21 05:58:17 -08:00