diff options
Diffstat (limited to 'newlib/libc/include/ssp/ssp.h')
| -rw-r--r-- | newlib/libc/include/ssp/ssp.h | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/newlib/libc/include/ssp/ssp.h b/newlib/libc/include/ssp/ssp.h index 9229086..49ea5f2 100644 --- a/newlib/libc/include/ssp/ssp.h +++ b/newlib/libc/include/ssp/ssp.h @@ -43,11 +43,20 @@ #define __ssp_inline extern __inline__ __attribute__((__always_inline__, __gnu_inline__)) +#if __SSP_FORTIFY_LEVEL > 2 +#define __ssp_bos(ptr) __builtin_dynamic_object_size(ptr, 1) +#define __ssp_bos0(ptr) __builtin_dynamic_object_size(ptr, 0) +#define __ssp_bos_known(ptr) \ + (__builtin_object_size(ptr, 0) != (size_t)-1 \ + || !__builtin_constant_p(__ssp_bos(ptr))) +#else #define __ssp_bos(ptr) __builtin_object_size(ptr, __SSP_FORTIFY_LEVEL > 1) #define __ssp_bos0(ptr) __builtin_object_size(ptr, 0) +#define __ssp_bos_known(ptr) (__ssp_bos0(ptr) != (size_t)-1) +#endif #define __ssp_check(buf, len, bos) \ - if (bos(buf) != (size_t)-1 && len > bos(buf)) \ + if (__ssp_bos_known(buf) && len > bos(buf)) \ __chk_fail() #define __ssp_decl(rtype, fun, args) \ rtype __ssp_real_(fun) args __asm__(__ASMNAME(#fun)); \ |