qiurui
/
glibc
mirror of git://sourceware.org/git/glibc.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity
glibc/sysdeps/x86
History
H.J. Lu 88866d885c x86: Update _dl_tlsdesc_dynamic to preserve caller-saved registers 
Compiler generates the following instruction sequence for GNU2 dynamic
TLS access:

	leaq	tls_var@TLSDESC(%rip), %rax
	call	*tls_var@TLSCALL(%rax)

or

	leal	tls_var@TLSDESC(%ebx), %eax
	call	*tls_var@TLSCALL(%eax)

CALL instruction is transparent to compiler which assumes all registers,
except for EFLAGS and RAX/EAX, are unchanged after CALL.  When
_dl_tlsdesc_dynamic is called, it calls __tls_get_addr on the slow
path.  __tls_get_addr is a normal function which doesn't preserve any
caller-saved registers.  _dl_tlsdesc_dynamic saved and restored integer
caller-saved registers, but didn't preserve any other caller-saved
registers.  Add _dl_tlsdesc_dynamic IFUNC functions for FNSAVE, FXSAVE,
XSAVE and XSAVEC to save and restore all caller-saved registers.  This
fixes BZ #31372.

Add GLRO(dl_x86_64_runtime_resolve) with GLRO(dl_x86_tlsdesc_dynamic)
to optimize elf_machine_runtime_setup.
Reviewed-by: Noah Goldstein <goldstein.w.n@gmail.com>

(cherry picked from commit 0aac205a81)
 		2025-08-19 18:22:00 -07:00
..
bits x86-64/cet: Make CET feature check specific to Linux/x86 2025-08-19 15:39:23 -07:00
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/cet: Enable shadow stack during startup 2025-08-19 15:39:23 -07:00
nptl Update copyright dates with scripts/update-copyrights 2023-01-06 21:14:39 +00:00
sys/platform x86-64/cet: Make CET feature check specific to Linux/x86 2025-08-19 15:39:23 -07:00
Makeconfig Add _Float64x function aliases. 2017-11-27 14:16:47 +00:00
Makefile x86: Update _dl_tlsdesc_dynamic to preserve caller-saved registers 2025-08-19 18:22:00 -07:00
Versions <sys/platform/x86.h>: Remove the C preprocessor magic 2021-01-21 05:58:17 -08:00
__longjmp_cancel.S x86-64/cet: Check the restore token in longjmp 2025-08-19 15:39:23 -07:00
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
configure i386: Ignore --enable-cet 2025-08-19 15:39:23 -07:00
configure.ac i386: Ignore --enable-cet 2025-08-19 15:39:23 -07:00
cpu-features-offsets.sym i386: Remove CET support bits 2025-08-19 15:39:23 -07:00
cpu-features.c x86: Update _dl_tlsdesc_dynamic to preserve caller-saved registers 2025-08-19 18:22:00 -07:00
cpu-tunables.c x86/cet: Don't set CET active by default 2025-08-19 15:39:23 -07:00
dl-cacheinfo.h x86: Check the lower byte of EAX of CPUID leaf 2 [BZ #30643] 2025-01-09 07:31:17 -08:00
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-hwcap.h 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-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 x86: Update _dl_tlsdesc_dynamic to preserve caller-saved registers 2025-08-19 18:22:00 -07:00
dl-procinfo.h Update copyright dates with scripts/update-copyrights 2023-01-06 21:14:39 +00:00
dl-prop.h Fix misspellings in sysdeps/ -- BZ 25337 2023-05-30 23:02:29 +00:00
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
features-offsets.sym x86: Update _dl_tlsdesc_dynamic to preserve caller-saved registers 2025-08-19 18:22:00 -07:00
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 x86-64/cet: Make CET feature check specific to Linux/x86 2025-08-19 15:39:23 -07:00
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 i386: Remove CET support bits 2025-08-19 15:39:23 -07:00
libc-start.c Update copyright dates with scripts/update-copyrights 2023-01-06 21:14:39 +00:00
libc-start.h x86/cet: Enable shadow stack during startup 2025-08-19 15:39:23 -07:00
link_map.h Update copyright dates with scripts/update-copyrights 2023-01-06 21:14:39 +00:00
linkmap.h
…
longjmp.c Update copyright dates with scripts/update-copyrights 2023-01-06 21:14:39 +00:00
readelflib.c x86: Make dl-cache.h and readelflib.c not Linux-specific 2023-06-26 10:04:31 -03:00
sysdep.h x86: Update _dl_tlsdesc_dynamic to preserve caller-saved registers 2025-08-19 18:22:00 -07:00
tininess.h
…
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 2025-08-19 15:39:23 -07:00
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 i386: Disable Intel Xeon Phi tests for GCC 15 and above (BZ 31782) 2024-05-28 09:33:22 -07:00
tst-get-cpu-features-static.c
…
tst-get-cpu-features.c <sys/platform/x86.h>: Add APX support 2023-07-27 08:42:32 -07:00
tst-gnu2-tls2.c x86: Update _dl_tlsdesc_dynamic to preserve caller-saved registers 2025-08-19 18:22:00 -07:00
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-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
utmp-size.h login: Check default sizes of structs utmp, utmpx, lastlog 2024-04-19 18:38:23 +02:00