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* sysdeps/unisx/sysv/linux/dl-execstack.c: Get protection flag
	from memory.
	* elf/dl-load.c (_dl_map_object_from_fd): Add PROT_EXEC flag to
	__stack_flags.
This commit is contained in:
Ulrich Drepper
2004-09-19 02:48:59 +00:00
parent d72433621f
commit dcca3fe25f
3 changed files with 47 additions and 16 deletions
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13
sysdeps/unix/sysv/linux/dl-execstack.c
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@ -28,6 +28,14 @@
#include "kernel-features.h"
int __stack_prot attribute_hidden attribute_relro
#if _STACK_GROWS_DOWN
= PROT_READ|PROT_WRITE|PROT_GROWSDOWN;
#elif _STACK_GROWS_UP
= PROT_READ|PROT_WRITE|PROT_GROWSUP;
#endif
int
internal_function
_dl_make_stack_executable (void **stack_endp)
@ -51,8 +59,7 @@ _dl_make_stack_executable (void **stack_endp)
# endif
{
if (__builtin_expect (__mprotect ((void *) page, GLRO(dl_pagesize),
PROT_READ|PROT_WRITE|PROT_EXEC
|PROT_GROWSDOWN) == 0, 1))
__stack_prot) == 0, 1))
goto return_success;
# if __ASSUME_PROT_GROWSUPDOWN == 0
if (errno == EINVAL)
@ -76,7 +83,7 @@ _dl_make_stack_executable (void **stack_endp)
while (1)
{
if (__mprotect ((void *) page, size,
PROT_READ|PROT_WRITE|PROT_EXEC) == 0)
__stack_prot & ~PROT_GROWSDOWN) == 0)
/* We got this chunk changed; loop to do another chunk below. */
page -= size;
else