diff options
Diffstat (limited to 'include/linux/compiler.h')
-rw-r--r-- | include/linux/compiler.h | 32 |
1 files changed, 31 insertions, 1 deletions
diff --git a/include/linux/compiler.h b/include/linux/compiler.h index 043b60de041e..e95a2631e545 100644 --- a/include/linux/compiler.h +++ b/include/linux/compiler.h @@ -185,8 +185,34 @@ void ftrace_likely_update(struct ftrace_likely_data *f, int val, #endif /* Unreachable code */ +#ifdef CONFIG_STACK_VALIDATION +#define annotate_reachable() ({ \ + asm("%c0:\n\t" \ + ".pushsection .discard.reachable\n\t" \ + ".long %c0b - .\n\t" \ + ".popsection\n\t" : : "i" (__LINE__)); \ +}) +#define annotate_unreachable() ({ \ + asm("%c0:\n\t" \ + ".pushsection .discard.unreachable\n\t" \ + ".long %c0b - .\n\t" \ + ".popsection\n\t" : : "i" (__LINE__)); \ +}) +#define ASM_UNREACHABLE \ + "999:\n\t" \ + ".pushsection .discard.unreachable\n\t" \ + ".long 999b - .\n\t" \ + ".popsection\n\t" +#else +#define annotate_reachable() +#define annotate_unreachable() +#endif + +#ifndef ASM_UNREACHABLE +# define ASM_UNREACHABLE +#endif #ifndef unreachable -# define unreachable() do { } while (1) +# define unreachable() do { annotate_reachable(); do { } while (1); } while (0) #endif /* @@ -475,6 +501,10 @@ static __always_inline void __write_once_size(volatile void *p, void *res, int s #define __visible #endif +#ifndef __nostackprotector +# define __nostackprotector +#endif + /* * Assume alignment of return value. */ |