1 files changed, 90 insertions, 0 deletions
diff --git a/ports/sysdeps/unix/sysv/linux/arm/____longjmp_chk.S b/ports/sysdeps/unix/sysv/linux/arm/____longjmp_chk.S
new file mode 100644
index 0000000000..8ec41521ca
--- /dev/null
+++ b/ports/sysdeps/unix/sysv/linux/arm/____longjmp_chk.S
@@ -0,0 +1,90 @@
+/* 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, see
+   <http://www.gnu.org/licenses/>.  */
+
+#include <sysdep.h>
+
+	.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;					\
+	cfi_undefined (sl);					\
+.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)				\
+	cfi_remember_state;			\
+	cmp	sp, reg;			\
+	bls	.Lok;				\
+	str	r7, [sp, #-4]!;			\
+	cfi_adjust_cfa_offset (4);		\
+	cfi_rel_offset (r7, 0);			\
+	mov	r5, r0;				\
+	cfi_undefined (r5);			\
+	mov	r7, #SYS_ify(sigaltstack);	\
+	mov	r0, #0;				\
+	sub	sp, sp, #12; /* == sizeof (stack_t) */ \
+	cfi_adjust_cfa_offset (12);		\
+	cfi_remember_state;			\
+	mov	r1, sp;				\
+	swi	#0;				\
+	cmp	r0, #0;				\
+	bne	.Lok2;				\
+	ldr	r1, [sp, #4];			\
+	tst	r1, #1;				\
+	beq	.Lfail;				\
+	ldr	r2, [sp, #0];			\
+	ldr	r3, [sp, #8];			\
+	add	r2, r2, r3;			\
+	sub	r2, r2, reg;			\
+	cmp	r2, r3;				\
+	bhi	.Lok2;				\
+.Lfail:						\
+	add	sp, sp, #12;			\
+	cfi_adjust_cfa_offset (-12);		\
+	ldr	r7, [sp], #4;			\
+	cfi_adjust_cfa_offset (-4);		\
+	cfi_restore (r7);			\
+	CALL_FAIL				\
+	cfi_restore_state;			\
+.Lok2:						\
+	mov	r0, r5;				\
+	cfi_restore_state;			\
+.Lok:
+
+#include <__longjmp.S>