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glibc/sysdeps/i386
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H.J. Lu 0f09154c64 x86: Initialize CPU info via IFUNC relocation [BZ 26203] 
X86 CPU features in ld.so are initialized by init_cpu_features, which is
invoked by DL_PLATFORM_INIT from _dl_sysdep_start.  But when ld.so is
loaded by static executable, DL_PLATFORM_INIT is never called.  Also
x86 cache info in libc.o and libc.a is initialized by a constructor
which may be called too late.  Since some fields in _rtld_global_ro
in ld.so are initialized by dynamic relocation, we can also initialize
x86 CPU features in _rtld_global_ro in ld.so and cache info in libc.so
by initializing dummy function pointers in ld.so and libc.so via IFUNC
relocation.

Key points:

1. IFUNC is always supported, independent of --enable-multi-arch or
--disable-multi-arch.  Linker generates IFUNC relocations from input
IFUNC objects and ld.so performs IFUNC relocations.
2. There are no IFUNC dependencies in ld.so before dynamic relocation
have been performed,
3. The x86 CPU features in ld.so is initialized by DL_PLATFORM_INIT
in dynamic executable and by IFUNC relocation in dlopen in static
executable.
4. The x86 cache info in libc.o is initialized by IFUNC relocation.
5. In libc.a, both x86 CPU features and cache info are initialized from
ARCH_INIT_CPU_FEATURES, not by IFUNC relocation, before __libc_early_init
is called.

Note: _dl_x86_init_cpu_features can be called more than once from
DL_PLATFORM_INIT and during relocation in ld.so.
2020-10-16 16:17:53 -07:00
..
fpu Update i686 ulps. 2020-09-02 10:00:29 -04:00
htl hurd: fix clearing SS_ONSTACK when longjmp-ing from sighandler 2020-06-06 20:24:30 +02:00
i586 Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
i686 x86: Install <sys/platform/x86.h> [BZ #26124] 2020-09-11 17:20:52 -07:00
i786
nptl aarch64: enforce >=64K guard size [BZ #26691] 2020-10-02 09:57:44 +01:00
sys Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
____longjmp_chk.S
__longjmp.S Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
abort-instr.h
add_n.S Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
addmul_1.S Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
asm-syntax.h Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
backtrace.c Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
bcopy.S
bsd-_setjmp.S Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
bsd-setjmp.S Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
bzero.S
configure
configure.ac
crti.S Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
crtn.S Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
dl-irel.h Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
dl-machine.h x86: Initialize CPU info via IFUNC relocation [BZ 26203] 2020-10-16 16:17:53 -07:00
dl-procinfo.c Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
dl-tls.h Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
dl-tlsdesc.h Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
dl-tlsdesc.S Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
dl-trampoline.S Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
ffs.c Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
gccframe.h Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
htonl.S Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
htons.S Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
i386-mcount.S i386-mcount.S: Add _CET_ENDBR to _mcount and __fentry__ 2020-02-01 05:44:55 -08:00
Implies
isa.h Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
jmpbuf-offsets.h Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
jmpbuf-unwind.h Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
link-defines.sym
lshift.S Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
machine-gmon.h Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
Makefile x86: Remove the unused __x86_prefetchw 2020-07-11 09:34:03 -07:00
malloc-alignment.h Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
memchr.S Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
memcmp.S Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
memcopy.h Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
memcpy_chk.S Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
memcpy.S Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
memmove_chk.S Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
memmove.S
mempcpy_chk.S Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
mempcpy.S
memset_chk.S Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
memset.S Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
memusage.h Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
mp_clz_tab.c
mul_1.S Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
preconfigure
pthread_spin_trylock.S linux: Consolidate INLINE_SYSCALL 2020-02-14 21:09:12 -03:00
rawmemchr.S Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
rshift.S Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
setfpucw.c x86: Support usable check for all CPU features 2020-07-13 06:05:16 -07:00
setjmp.S Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
stackguard-macros.h
stackinfo.h Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
start.S Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
stpcpy.S Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
stpncpy.S Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
strcat.S Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
strchr.S Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
strchrnul.S Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
strcspn.S Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
string-inlines.c Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
strlen.c Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
strlen.S Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
strpbrk.S Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
strrchr.S Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
strspn.S Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
sub_n.S i386/sub_n.S: Add a missing _CET_ENDBR to indirect jump target 2020-02-01 05:44:55 -08:00
submul_1.S Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
symbol-hacks.h Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
sysdep.h i386: Remove build support for GCC older than GCC 6 2020-04-07 06:44:37 -07:00
tls-macros.h i386: Remove build support for GCC older than GCC 6 2020-04-07 06:44:37 -07:00
tlsdesc.c Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
tlsdesc.sym
tst-audit3.c Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
tst-audit3.h Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
tst-audit.h Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
tst-auditmod3a.c Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
tst-auditmod3b.c Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
tst-ld-sse-use.sh Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
tst-stack-align.h Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
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