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authorUlrich Drepper <drepper@redhat.com>2004-01-13 15:35:20 +0000
committerUlrich Drepper <drepper@redhat.com>2004-01-13 15:35:20 +0000
commit0a182a286d84451b70a40948247319ac9723decb (patch)
tree504cf83c29f381c5668faea85dfd33927dbe01b1 /sysdeps/unix/sysv/linux/dl-execstack.c
parentdc927809b187986876a69419df68c83623b79ab3 (diff)
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Change interface. Add challenge for caller.
Diffstat (limited to 'sysdeps/unix/sysv/linux/dl-execstack.c')
-rw-r--r--sysdeps/unix/sysv/linux/dl-execstack.c9
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);