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[TSan] Improve handling of stack pointer mangling in {set,long}jmp, pt.5

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Remove unnecessary computation of mangled SP for ARM64 architecture.

Reviewed By: dvyukov

Differential Revision: https://reviews.llvm.org/D64022

llvm-svn: 365230
This commit is contained in:
Julian Lettner 2019-07-05 18:00:16 +00:00
parent 6bb13da7c1
commit 515fdfd512
1 changed files with 4 additions and 39 deletions
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43
compiler-rt/lib/tsan/rtl/tsan_rtl_aarch64.S
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@ -105,18 +105,8 @@ ASM_SYMBOL_INTERCEPTOR(setjmp):
CFI_OFFSET (19, -16)
mov x19, x0
#if !defined(__APPLE__)
// SP pointer mangling (see glibc setjmp)
adrp x2, __tsan_pointer_chk_guard
ldr x2, [x2, #:lo12:__tsan_pointer_chk_guard]
// Obtain SP, first argument to `void __tsan_setjmp(uptr sp)`
add x0, x29, 32
eor x1, x2, x0
#else
adrp x2, ___tsan_darwin_setjmp_xor_key@page
ldr x2, [x2, ___tsan_darwin_setjmp_xor_key@pageoff]
add x0, x29, 32
eor x1, x2, x0
#endif
// call tsan interceptor
bl ASM_SYMBOL(__tsan_setjmp)
@ -165,18 +155,8 @@ ASM_SYMBOL_INTERCEPTOR(_setjmp):
CFI_OFFSET (19, -16)
mov x19, x0
#if !defined(__APPLE__)
// SP pointer mangling (see glibc setjmp)
adrp x2, __tsan_pointer_chk_guard
ldr x2, [x2, #:lo12:__tsan_pointer_chk_guard]
// Obtain SP, first argument to `void __tsan_setjmp(uptr sp)`
add x0, x29, 32
eor x1, x2, x0
#else
adrp x2, ___tsan_darwin_setjmp_xor_key@page
ldr x2, [x2, ___tsan_darwin_setjmp_xor_key@pageoff]
add x0, x29, 32
eor x1, x2, x0
#endif
// call tsan interceptor
bl ASM_SYMBOL(__tsan_setjmp)
@ -227,18 +207,8 @@ ASM_SYMBOL_INTERCEPTOR(sigsetjmp):
mov w20, w1
mov x19, x0
#if !defined(__APPLE__)
// SP pointer mangling (see glibc setjmp)
adrp x2, __tsan_pointer_chk_guard
ldr x2, [x2, #:lo12:__tsan_pointer_chk_guard]
// Obtain SP, first argument to `void __tsan_setjmp(uptr sp)`
add x0, x29, 32
eor x1, x2, x0
#else
adrp x2, ___tsan_darwin_setjmp_xor_key@page
ldr x2, [x2, ___tsan_darwin_setjmp_xor_key@pageoff]
add x0, x29, 32
eor x1, x2, x0
#endif
// call tsan interceptor
bl ASM_SYMBOL(__tsan_setjmp)
@ -292,13 +262,8 @@ ASM_SYMBOL_INTERCEPTOR(__sigsetjmp):
mov w20, w1
mov x19, x0
#if !defined(__APPLE__)
// SP pointer mangling (see glibc setjmp)
adrp x2, __tsan_pointer_chk_guard
ldr x2, [x2, #:lo12:__tsan_pointer_chk_guard]
// Obtain SP, first argument to `void __tsan_setjmp(uptr sp)`
add x0, x29, 32
eor x1, x2, x0
#endif
// call tsan interceptor
bl ASM_SYMBOL(__tsan_setjmp)