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____longjmp_chk for ARM.

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* sysdeps/arm/____longjmp_chk.S: New file.
	* sysdeps/arm/__longjmp.S: If CHECK_SP is defined, use it.
	* sysdeps/arm/eabi/__longjmp.S: Likewise.
This commit is contained in:
Joseph Myers 2009-05-16 22:20:23 +00:00
parent d9056ac655
commit ef889ffe8d
4 changed files with 71 additions and 2 deletions
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6
ChangeLog.arm
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@ -1,3 +1,9 @@
2009-05-16 Joseph Myers <joseph@codesourcery.com>
* sysdeps/arm/____longjmp_chk.S: New file.
* sysdeps/arm/__longjmp.S: If CHECK_SP is defined, use it.
* sysdeps/arm/eabi/__longjmp.S: Likewise.
2009-05-16 Joseph Myers <joseph@codesourcery.com>
* sysdeps/unix/sysv/linux/arm/kernel-features.h (__ASSUME_PREADV,

55
sysdeps/arm/____longjmp_chk.S Normal file
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@ -0,0 +1,55 @@
/* 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 General Public License
along with GCC; see the file COPYING. If not, write to the Free
Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
02110-1301, USA. */
.section .rodata.str1.1,"aMS",%progbits,1
.type longjmp_msg,%object
longjmp_msg:
.string "longjmp causes uninitialized stack frame"
.size longjmp_msg, .-longjmp_msg
.text
#define __longjmp ____longjmp_chk
#ifdef PIC
# define CALL_FAIL \
ldr sl, .L_GOT; \
.L_GOT_OFF: \
add sl, pc, sl; \
ldr r0, .Lstr; \
add r0, sl, r0; \
B PLTJMP(HIDDEN_JUMPTARGET(__fortify_fail)); \
.L_GOT: \
.word _GLOBAL_OFFSET_TABLE_-(.L_GOT_OFF+8); \
.Lstr: \
.word longjmp_msg(GOTOFF);
#else
# define CALL_FAIL \
ldr r0, .Lstr; \
B HIDDEN_JUMPTARGET(__fortify_fail); \
.Lstr: \
.word longjmp_msg;
#endif
#define CHECK_SP(reg) \
cmp sp, reg; \
ble .Lok; \
CALL_FAIL \
.Lok:
#include <__longjmp.S>

6
sysdeps/arm/__longjmp.S
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@ -1,5 +1,5 @@
/* longjmp for ARM.
Copyright (C) 1997, 1998 Free Software Foundation, Inc.
Copyright (C) 1997, 1998, 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
@ -29,5 +29,9 @@ ENTRY (__longjmp)
movs r0, r1 /* get the return value in place */
moveq r0, #1 /* can't let setjmp() return zero! */
#ifdef CHECK_SP
ldr r1, [ip, #32]
CHECK_SP (r1)
#endif
LOADREGS(ia, ip, {v1-v6, sl, fp, sp, pc})
END (__longjmp)

6
sysdeps/arm/eabi/__longjmp.S
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@ -1,5 +1,5 @@
/* longjmp for ARM.
Copyright (C) 1997, 1998, 2005, 2006 Free Software Foundation, Inc.
Copyright (C) 1997, 1998, 2005, 2006, 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
@ -30,6 +30,10 @@ ENTRY (__longjmp)
movs r0, r1 /* get the return value in place */
moveq r0, #1 /* can't let setjmp() return zero! */
#ifdef CHECK_SP
ldr r1, [ip, #32]
CHECK_SP (r1)
#endif
LOADREGS(ia, ip!, {v1-v6, sl, fp, sp, lr})
#ifdef IS_IN_rtld