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c94767712b
glibc/sysdeps/aarch64
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Szabolcs Nagy c94767712b aarch64: fix pac-ret support in _mcount 
Currently gcc -pg -mbranch-protection=pac-ret passes signed return
address to _mcount, so _mcount now has to always strip pac from the
frompc since that's from user code that may be built with pac-ret.

This is gcc PR target/94791: signed pointers should not escape and get
passed across extern call boundaries, since that's an ABI break, but
because existing gcc has this issue we work it around in glibc until
that is resolved. This is compatible with a fixed gcc and it is a nop
on systems without PAuth support. The bug was introduced in gcc-7 with
-msign-return-address=non-leaf|all support which in gcc-9 got renamed
to -mbranch-protection=pac-ret|pac-ret+leaf|standard.

strip_pac uses inline asm instead of __builtin_aarch64_xpaclri since
that is not a documented api and not available in all supported gccs.

Reviewed-by: Adhemerval Zanella  <adhemerval.zanella@linaro.org>
2020-07-08 15:02:38 +01:00
..
bits Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
fpu aarch64: Remove fpu Makefile 2020-06-22 11:09:50 -03:00
multiarch aarch64: Add BTI support to assembly files 2020-07-08 15:02:37 +01:00
nptl nptl: add missing pthread-offsets.h 2020-02-10 17:01:21 +01:00
sys Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
__longjmp.S Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
abort-instr.h
atomic-machine.h Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
bsd-_setjmp.c aarch64: Rename place holder .S files to .c 2020-07-08 15:02:37 +01:00
bsd-setjmp.c aarch64: Rename place holder .S files to .c 2020-07-08 15:02:37 +01:00
configure aarch64: configure check for pac-ret code generation 2020-07-08 15:02:38 +01:00
configure.ac aarch64: configure check for pac-ret code generation 2020-07-08 15:02:38 +01:00
crti.S aarch64: Add pac-ret support to assembly files 2020-07-08 15:02:38 +01:00
crtn.S aarch64: Add pac-ret support to assembly files 2020-07-08 15:02:38 +01:00
dl-bti.c aarch64: enable BTI at runtime 2020-07-08 15:02:37 +01:00
dl-dtprocnum.h 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-link.sym
dl-machine.h aarch64: fix RTLD_START for BTI 2020-07-08 15:02:37 +01:00
dl-prop.h aarch64: enable BTI at runtime 2020-07-08 15:02:37 +01:00
dl-sysdep.h 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 aarch64: Add pac-ret support to assembly files 2020-07-08 15:02:38 +01:00
dl-trampoline.S aarch64: Add pac-ret support to assembly files 2020-07-08 15:02:38 +01:00
dl-tunables.list Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
e_sqrtl.c Add libm_alias_finite for _finite symbols 2020-01-03 10:02:04 -03:00
elf-initfini.h Introduce <elf-initfini.h> and ELF_INITFINI for all architectures 2020-02-18 15:12:25 +01:00
Implies
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
ldsodefs.h Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
libc-tls.c Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
libm-test-ulps Update aarch64 libm-test-ulps 2020-04-08 13:52:44 -03:00
libm-test-ulps-name
linkmap.h aarch64: enable BTI at runtime 2020-07-08 15:02:37 +01:00
machine-gmon.h aarch64: fix pac-ret support in _mcount 2020-07-08 15:02:38 +01:00
Makefile aarch64: ensure objects are BTI compatible 2020-07-08 15:02:38 +01:00
math-tests-trap.h Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
mcount.c Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
memchr.S aarch64: MTE compatible memchr 2020-06-23 17:55:39 +01:00
memcmp.S Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
memcpy.S [AArch64] Improve integer memcpy 2020-03-11 17:15:25 +00:00
memmove.c aarch64: Rename place holder .S files to .c 2020-07-08 15:02:37 +01:00
memrchr.S aarch64: MTE compatible memrchr 2020-06-23 17:55:39 +01:00
memset-reg.h 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
preconfigure
rawmemchr.S Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
setjmp.S Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
sfp-machine.h
sotruss-lib.c Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
stackinfo.h Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
start.S aarch64: Add BTI support to assembly files 2020-07-08 15:02:37 +01:00
stpcpy.S Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
strchr.S aarch64: MTE compatible strchr 2020-06-09 09:20:27 +01:00
strchrnul.S aarch64: MTE compatible strchrnul 2020-06-09 09:20:27 +01:00
strcmp.S aarch64: MTE compatible strcmp 2020-06-23 17:55:39 +01:00
strcpy.S aarch64: MTE compatible strcpy 2020-06-23 17:55:39 +01:00
string_private.h Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
strlen.S aarch64: MTE compatible strlen 2020-06-09 09:21:11 +01:00
strncmp.S aarch64: MTE compatible strncmp 2020-06-23 17:55:39 +01:00
strnlen.S aarch64: fix strcpy and strnlen for big-endian [BZ #25824] 2020-05-15 12:15:56 +01:00
strrchr.S aarch64: MTE compatible strrchr 2020-06-23 17:55:39 +01:00
sysdep.h aarch64: fix pac-ret support in _mcount 2020-07-08 15:02:38 +01:00
tls-macros.h Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
tlsdesc.c Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
tlsdesc.sym
tst-audit.h Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
tst-ifunc-arg-1.c Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
tst-ifunc-arg-2.c Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
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