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| author | Vlad Tsyrklevich <vlad@tsyrklevich.net> | 2019-03-07 18:56:36 +0000 |
|---|---|---|
| committer | Vlad Tsyrklevich <vlad@tsyrklevich.net> | 2019-03-07 18:56:36 +0000 |
| commit | 2e1479e2f2dd0e5a7c445fdf6f12b6e66aea96f3 (patch) | |
| tree | 711d4b4cc815ce928e824566232dc11af14152b4 /compiler-rt/test/shadowcallstack/minimal_runtime.h | |
| parent | de3348ae3f01fd4e45c03edc571c41aab182c308 (diff) | |
| download | bcm5719-llvm-2e1479e2f2dd0e5a7c445fdf6f12b6e66aea96f3.tar.gz bcm5719-llvm-2e1479e2f2dd0e5a7c445fdf6f12b6e66aea96f3.zip | |
Delete x86_64 ShadowCallStack support
Summary:
ShadowCallStack on x86_64 suffered from the same racy security issues as
Return Flow Guard and had performance overhead as high as 13% depending
on the benchmark. x86_64 ShadowCallStack was always an experimental
feature and never shipped a runtime required to support it, as such
there are no expected downstream users.
Reviewers: pcc
Reviewed By: pcc
Subscribers: mgorny, javed.absar, hiraditya, jdoerfert, cfe-commits, #sanitizers, llvm-commits
Tags: #clang, #sanitizers, #llvm
Differential Revision: https://reviews.llvm.org/D59034
llvm-svn: 355624
Diffstat (limited to 'compiler-rt/test/shadowcallstack/minimal_runtime.h')
| -rw-r--r-- | compiler-rt/test/shadowcallstack/minimal_runtime.h | 9 |
1 files changed, 1 insertions, 8 deletions
diff --git a/compiler-rt/test/shadowcallstack/minimal_runtime.h b/compiler-rt/test/shadowcallstack/minimal_runtime.h index f36fa5a7d24..fab4fdf8006 100644 --- a/compiler-rt/test/shadowcallstack/minimal_runtime.h +++ b/compiler-rt/test/shadowcallstack/minimal_runtime.h @@ -4,10 +4,6 @@ #pragma once -#ifdef __x86_64__ -#include <asm/prctl.h> -int arch_prctl(int code, void *addr); -#endif #include <stdlib.h> #include <sys/mman.h> #include <sys/prctl.h> @@ -21,10 +17,7 @@ static void __shadowcallstack_init() { if (stack == MAP_FAILED) abort(); -#if defined(__x86_64__) - if (arch_prctl(ARCH_SET_GS, stack)) - abort(); -#elif defined(__aarch64__) +#if defined(__aarch64__) __asm__ __volatile__("mov x18, %0" ::"r"(stack)); #else #error Unsupported platform |
