diff options
Diffstat (limited to 'sysdeps/unix/sysv/linux')
| -rw-r--r-- | sysdeps/unix/sysv/linux/dl-execstack.c | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/sysdeps/unix/sysv/linux/dl-execstack.c b/sysdeps/unix/sysv/linux/dl-execstack.c index aafa2df1b1..d93dc8585f 100644 --- a/sysdeps/unix/sysv/linux/dl-execstack.c +++ b/sysdeps/unix/sysv/linux/dl-execstack.c @@ -1,5 +1,5 @@ /* Stack executability handling for GNU dynamic linker. Linux version. - Copyright (C) 2003 Free Software Foundation, Inc. + Copyright (C) 2003, 2004 Free Software Foundation, Inc. This file is part of the GNU C Library. The GNU C Library is free software; you can redistribute it and/or @@ -30,8 +30,13 @@ extern void *__libc_stack_end; int internal_function -_dl_make_stack_executable (void) +_dl_make_stack_executable (void **stack_endp) { + /* Challenge the caller. */ + if (*stack_endp != __libc_stack_end) + return EPERM; + *stack_endp = NULL; + #if _STACK_GROWS_DOWN /* This gives us the highest page that needs to be changed. */ uintptr_t page = (uintptr_t) __libc_stack_end & -(intptr_t) GL(dl_pagesize); |