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| author | Ulrich Drepper <drepper@redhat.com> | 2004-01-13 15:35:20 +0000 |
|---|---|---|
| committer | Ulrich Drepper <drepper@redhat.com> | 2004-01-13 15:35:20 +0000 |
| commit | 0a182a286d84451b70a40948247319ac9723decb (patch) | |
| tree | 504cf83c29f381c5668faea85dfd33927dbe01b1 | |
| parent | dc927809b187986876a69419df68c83623b79ab3 (diff) | |
| download | glibc-0a182a286d84451b70a40948247319ac9723decb.tar.gz glibc-0a182a286d84451b70a40948247319ac9723decb.tar.xz glibc-0a182a286d84451b70a40948247319ac9723decb.zip | |
Change interface. Add challenge for caller.
| -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); |