____longjmp_chk for ARM.

	* sysdeps/arm/____longjmp_chk.S: New file.
	* sysdeps/arm/__longjmp.S: If CHECK_SP is defined, use it.
	* sysdeps/arm/eabi/__longjmp.S: Likewise.

diff --git a/ChangeLog.arm b/ChangeLog.arm
index 420c153..1088fc0 100644 (file)
--- a/ChangeLog.arm
+++ b/ChangeLog.arm
@@ -1,5 +1,11 @@
 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,
        __ASSUME_PWRITEV): Don't undefine.
 

diff --git a/sysdeps/arm/____longjmp_chk.S b/sysdeps/arm/____longjmp_chk.S
new file mode 100644 (file)
index 0000000..9b65c36
--- /dev/null
+++ b/sysdeps/arm/____longjmp_chk.S
@@ -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>

diff --git a/sysdeps/arm/__longjmp.S b/sysdeps/arm/__longjmp.S
index 7b30160..c834e78 100644 (file)
--- a/sysdeps/arm/__longjmp.S
+++ b/sysdeps/arm/__longjmp.S
@@ -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)

diff --git a/sysdeps/arm/eabi/__longjmp.S b/sysdeps/arm/eabi/__longjmp.S
index fff25cd..1f3f791 100644 (file)
--- a/sysdeps/arm/eabi/__longjmp.S
+++ b/sysdeps/arm/eabi/__longjmp.S
@@ -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