llvmbot wrote:
<!--LLVM PR SUMMARY COMMENT--> @llvm/pr-subscribers-compiler-rt-sanitizer Author: None (llvmbot) <details> <summary>Changes</summary> Backport cc4f98979b079b517edd8a71f56a8975f436e63d Requested by: @<!-- -->asl --- Full diff: https://github.com/llvm/llvm-project/pull/100634.diff 1 Files Affected: - (modified) compiler-rt/lib/sanitizer_common/sanitizer_ptrauth.h (+24-22) ``````````diff diff --git a/compiler-rt/lib/sanitizer_common/sanitizer_ptrauth.h b/compiler-rt/lib/sanitizer_common/sanitizer_ptrauth.h index 5200354694851..b5215c0d49c06 100644 --- a/compiler-rt/lib/sanitizer_common/sanitizer_ptrauth.h +++ b/compiler-rt/lib/sanitizer_common/sanitizer_ptrauth.h @@ -9,31 +9,33 @@ #ifndef SANITIZER_PTRAUTH_H #define SANITIZER_PTRAUTH_H -#if __has_feature(ptrauth_calls) -#include <ptrauth.h> +#if __has_feature(ptrauth_intrinsics) +# include <ptrauth.h> #elif defined(__ARM_FEATURE_PAC_DEFAULT) && !defined(__APPLE__) -inline unsigned long ptrauth_strip(void* __value, unsigned int __key) { - // On the stack the link register is protected with Pointer - // Authentication Code when compiled with -mbranch-protection. - // Let's stripping the PAC unconditionally because xpaclri is in - // the NOP space so will do nothing when it is not enabled or not available. - unsigned long ret; - asm volatile( - "mov x30, %1\n\t" - "hint #7\n\t" // xpaclri - "mov %0, x30\n\t" - : "=r"(ret) - : "r"(__value) - : "x30"); - return ret; -} -#define ptrauth_auth_data(__value, __old_key, __old_data) __value -#define ptrauth_string_discriminator(__string) ((int)0) +// On the stack the link register is protected with Pointer +// Authentication Code when compiled with -mbranch-protection. +// Let's stripping the PAC unconditionally because xpaclri is in +// the NOP space so will do nothing when it is not enabled or not available. +# define ptrauth_strip(__value, __key) \ + ({ \ + unsigned long ret; \ + asm volatile( \ + "mov x30, %1\n\t" \ + "hint #7\n\t" \ + "mov %0, x30\n\t" \ + "mov x30, xzr\n\t" \ + : "=r"(ret) \ + : "r"(__value) \ + : "x30"); \ + ret; \ + }) +# define ptrauth_auth_data(__value, __old_key, __old_data) __value +# define ptrauth_string_discriminator(__string) ((int)0) #else // Copied from <ptrauth.h> -#define ptrauth_strip(__value, __key) __value -#define ptrauth_auth_data(__value, __old_key, __old_data) __value -#define ptrauth_string_discriminator(__string) ((int)0) +# define ptrauth_strip(__value, __key) __value +# define ptrauth_auth_data(__value, __old_key, __old_data) __value +# define ptrauth_string_discriminator(__string) ((int)0) #endif #define STRIP_PAC_PC(pc) ((uptr)ptrauth_strip(pc, 0)) `````````` </details> https://github.com/llvm/llvm-project/pull/100634 _______________________________________________ llvm-branch-commits mailing list llvm-branch-commits@lists.llvm.org https://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-branch-commits
