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Add ____longjmp_chk for m68k-linux

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This commit is contained in:
Andreas Schwab 2009-09-06 21:20:26 +02:00
parent 53df8bcec0
commit f0e6944906
3 changed files with 51 additions and 1 deletions
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6
ChangeLog.m68k
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@ -1,3 +1,9 @@
2009-09-06 Andreas Schwab <schwab@linux-m68k.org>
* sysdeps/unix/sysv/linux/m68k/____longjmp_chk.c: New file.
* sysdeps/m68k/__longjmp.c (__longjmp): Call CHECK_SP if defined.
2009-05-16 Joseph Myers <joseph@codesourcery.com>
* sysdeps/unix/sysv/linux/m68k/Versions (libc): Add

7
sysdeps/m68k/__longjmp.c
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@ -1,4 +1,5 @@
/* Copyright (C) 1991, 92, 93, 94, 95, 97 Free Software Foundation, Inc.
/* Copyright (C) 1991, 1992, 1993, 1994, 1995, 1997, 2009
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
@ -27,6 +28,10 @@ __longjmp (__jmp_buf env, int val)
/* This restores the FP and SP that setjmp's caller had,
and puts the return address into A0 and VAL into D0. */
#ifdef CHECK_SP
CHECK_SP (env[0].__sp);
#endif
#if defined(__HAVE_68881__) || defined(__HAVE_FPU__)
/* Restore the floating-point registers. */
asm volatile("fmovem%.x %0, %/fp0-%/fp7" :

39
sysdeps/unix/sysv/linux/m68k/____longjmp_chk.c Normal file
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@ -0,0 +1,39 @@
/* Copyright (C) 2009 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
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#include <stdio.h>
#include <signal.h>
#include <sysdep.h>
#define __longjmp ____longjmp_chk
#define CHECK_SP(sp) \
do { \
register unsigned long this_sp asm ("sp"); \
if ((unsigned long) (sp) < this_sp) \
{ \
struct sigaltstack oss; \
INTERNAL_SYSCALL_DECL (err); \
int result = INTERNAL_SYSCALL (sigaltstack, err, 2, NULL, &oss); \
if (!INTERNAL_SYSCALL_ERROR_P (result, err) \
&& ((oss.ss_flags & SS_ONSTACK) == 0 \
|| ((unsigned long) oss.ss_sp + oss.ss_size \
- (unsigned long) (sp)) < oss.ss_size)) \
__fortify_fail ("longjmp causes uninitialized stack frame"); \
} \
} while (0)
#include <__longjmp.c>