diff options
Diffstat (limited to 'sysdeps/unix/sysv')
| -rw-r--r-- | sysdeps/unix/sysv/linux/dl-execstack.c | 25 |
1 files changed, 10 insertions, 15 deletions
diff --git a/sysdeps/unix/sysv/linux/dl-execstack.c b/sysdeps/unix/sysv/linux/dl-execstack.c index 3d8f3938..b986898 100644 --- a/sysdeps/unix/sysv/linux/dl-execstack.c +++ b/sysdeps/unix/sysv/linux/dl-execstack.c @@ -27,35 +27,30 @@ #include <sysdep.h> #include <unistd.h> -extern int __stack_prot attribute_relro attribute_hidden; - static int make_main_stack_executable (void **stack_endp) { /* This gives us the highest/lowest page that needs to be changed. */ uintptr_t page = ((uintptr_t) *stack_endp & -(intptr_t) GLRO(dl_pagesize)); - int result = 0; - if (__builtin_expect (__mprotect ((void *) page, GLRO(dl_pagesize), - __stack_prot) == 0, 1)) - goto return_success; - result = errno; - goto out; + if (__mprotect ((void *) page, GLRO(dl_pagesize), + PROT_READ | PROT_WRITE | PROT_EXEC +#if _STACK_GROWS_DOWN + | PROT_GROWSDOWN +#elif _STACK_GROWS_UP + | PROT_GROWSUP +#endif + ) != 0) + return errno; - return_success: /* Clear the address. */ *stack_endp = NULL; /* Remember that we changed the permission. */ GL(dl_stack_flags) |= PF_X; - out: -#ifdef check_consistency - check_consistency (); -#endif - - return result; + return 0; } int |