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(CFLAGS-tst-align.c): Add -mpreferred-stack-boundary=4.

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This commit is contained in:
Ulrich Drepper
2004-12-22 20:10:10 +00:00
parent 0ecb606cb6
commit a334319f65
6215 changed files with 304673 additions and 494300 deletions
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28
sysdeps/unix/sysv/linux/dl-execstack.c
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@ -1,5 +1,5 @@
/* Stack executability handling for GNU dynamic linker. Linux version.
Copyright (C) 2003, 2004, 2005, 2006 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
@ -24,9 +24,8 @@
#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;
@ -39,7 +38,6 @@ _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),
@ -62,10 +60,7 @@ _dl_make_stack_executable (void **stack_endp)
no_growsupdown = true;
else
# endif
{
result = errno;
goto out;
}
return errno;
}
#endif
@ -90,10 +85,7 @@ _dl_make_stack_executable (void **stack_endp)
else
{
if (errno != ENOMEM) /* Unexpected failure mode. */
{
result = errno;
goto out;
}
return errno;
if (size == GLRO(dl_pagesize))
/* We just tried to mprotect the top hole page and failed.
@ -116,10 +108,7 @@ _dl_make_stack_executable (void **stack_endp)
else
{
if (errno != ENOMEM) /* Unexpected failure mode. */
{
result = errno;
goto out;
}
return errno;
if (size == GLRO(dl_pagesize))
/* We just tried to mprotect the lowest hole page and failed.
@ -144,11 +133,6 @@ _dl_make_stack_executable (void **stack_endp)
/* Remember that we changed the permission. */
GL(dl_stack_flags) |= PF_X;
out:
#ifdef check_consistency
check_consistency ();
#endif
return result;
return 0;
}
rtld_hidden_def (_dl_make_stack_executable)