diff options
Diffstat (limited to 'sysdeps/unix/sysv/linux/dl-execstack.c')
| -rw-r--r-- | sysdeps/unix/sysv/linux/dl-execstack.c | 28 |
1 files changed, 22 insertions, 6 deletions
diff --git a/sysdeps/unix/sysv/linux/dl-execstack.c b/sysdeps/unix/sysv/linux/dl-execstack.c index 6ef9679045..fcac5ae240 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, 2004 Free Software Foundation, Inc. + Copyright (C) 2003, 2004, 2005, 2006 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 @@ -24,8 +24,9 @@ #include <stdbool.h> #include <stackinfo.h> #include <caller.h> +#include <sysdep.h> -#include "kernel-features.h" +#include <kernel-features.h> extern int __stack_prot attribute_relro attribute_hidden; @@ -38,6 +39,7 @@ _dl_make_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; /* Challenge the caller. */ if (__builtin_expect (__check_caller (RETURN_ADDRESS (0), @@ -60,7 +62,10 @@ _dl_make_stack_executable (void **stack_endp) no_growsupdown = true; else # endif - return errno; + { + result = errno; + goto out; + } } #endif @@ -85,7 +90,10 @@ _dl_make_stack_executable (void **stack_endp) else { if (errno != ENOMEM) /* Unexpected failure mode. */ - return errno; + { + result = errno; + goto out; + } if (size == GLRO(dl_pagesize)) /* We just tried to mprotect the top hole page and failed. @@ -108,7 +116,10 @@ _dl_make_stack_executable (void **stack_endp) else { if (errno != ENOMEM) /* Unexpected failure mode. */ - return errno; + { + result = errno; + goto out; + } if (size == GLRO(dl_pagesize)) /* We just tried to mprotect the lowest hole page and failed. @@ -133,6 +144,11 @@ _dl_make_stack_executable (void **stack_endp) /* Remember that we changed the permission. */ GL(dl_stack_flags) |= PF_X; - return 0; + out: +#ifdef check_consistency + check_consistency (); +#endif + + return result; } rtld_hidden_def (_dl_make_stack_executable) |