Add sigstack handling to Linux ____longjmp_chk on powerpc.

2 files changed, 154 insertions, 0 deletions

diff --git a/sysdeps/unix/sysv/linux/powerpc/powerpc32/____longjmp_chk.S b/sysdeps/unix/sysv/linux/powerpc/powerpc32/____longjmp_chk.S
new file mode 100644
index 0000000000..4cb968505d
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/powerpc/powerpc32/____longjmp_chk.S
@@ -0,0 +1,85 @@
+/* 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 <sysdep.h>
+#include <rtld-global-offsets.h>
+
+	.section .rodata.str1.4,"aMS",@progbits,1
+	.align 2
+.LC0:
+	.string "longjmp causes uninitialized stack frame"
+	.text
+
+#define __longjmp ____longjmp_chk
+
+#ifdef PIC
+# ifdef HAVE_ASM_PPC_REL16
+#  define LOAD_ARG \
+	bcl	20,31,1f;				\
+1:	mflr	r3;					\
+	addis	r3,r3,_GLOBAL_OFFSET_TABLE_-1b@ha;	\
+	addi	r3,r3,_GLOBAL_OFFSET_TABLE_-1b@l;	\
+	lwz	r3,.LC0@got(r3)
+# else
+#  define LOAD_ARG \
+	bl	_GLOBAL_OFFSET_TABLE_-4@local;		\
+	mflr	r3;					\
+	lwz	r3,.LC0@got(r3)
+# endif
+#else
+# define LOAD_ARG \
+	lis	r3,.LC0@ha;				\
+	la	r3,.LC0@l(r3)
+#endif
+
+#define CHECK_SP(reg) \
+	cmplw	reg, r1;				\
+	bge+	.Lok;					\
+	mflr	r0;					\
+	stwu	r1,-32(r1);				\
+	cfi_remember_state;				\
+	cfi_adjust_cfa_offset (32);			\
+	stw	r0,36(r1);				\
+	cfi_offset (lr, 4);				\
+	mr	r31,r3;					\
+	mr	r30,r4;					\
+	li	r3,0;					\
+	addi	r4,r1,8;				\
+	li	r0,__NR_sigaltstack;			\
+	sc;						\
+	/* Without working sigaltstack we cannot perform the test.  */ \
+	bso	.Lok2;					\
+	lwz	r0,12(r1);				\
+	andi.	r3,r0,1;				\
+	beq	.Lfail;					\
+	lwz	r0,16(r1);				\
+	lwz	r3,8(r1);				\
+	add	r3,r3,r0;				\
+	sub	r3,r3,reg;				\
+	cmplw	r3,r0;					\
+	bge+	.Lok2;					\
+.Lfail:							\
+	LOAD_ARG;					\
+	bl	HIDDEN_JUMPTARGET (__fortify_fail);	\
+.Lok2:							\
+	mr	r3,r31;					\
+	mr	r4,r30;					\
+	cfi_restore_state;				\
+.Lok:
+
+#include <__longjmp-common.S>
diff --git a/sysdeps/unix/sysv/linux/powerpc/powerpc64/____longjmp_chk.S b/sysdeps/unix/sysv/linux/powerpc/powerpc64/____longjmp_chk.S
new file mode 100644
index 0000000000..936ace5f69
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/powerpc/powerpc64/____longjmp_chk.S
@@ -0,0 +1,69 @@
+/* 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 <sysdep.h>
+#include <rtld-global-offsets.h>
+
+	.section .rodata.str1.8,"aMS",@progbits,1
+	.align 3
+.LC0:
+	.string "longjmp causes uninitialized stack frame"
+	.section .toc,"aw"
+.LC1:
+	.tc .LC0[TC],.LC0
+	.text
+
+#define __longjmp ____longjmp_chk
+
+#define CHECK_SP(reg) \
+	cmpld	reg, r1;				\
+	bge+	.Lok;					\
+	mflr	r0;					\
+	std	r0,16(r1);				\
+	mr	r31,r3;					\
+	mr	r30,r4;					\
+	stdu	r1,-144(r1);				\
+	cfi_remember_state;				\
+	cfi_adjust_cfa_offset (144);			\
+	cfi_offset (lr, 16);				\
+	li	r3,0;					\
+	addi	r4,r1,112;				\
+	li	r0,__NR_sigaltstack;			\
+	sc;						\
+	/* Without working sigaltstack we cannot perform the test.  */ \
+	bso	.Lok2;					\
+	lwz	r0,112+8(r1);				\
+	andi.	r4,r0,1;				\
+	beq	.Lfail;					\
+	ld	r0,112+16(r1);				\
+	ld	r4,112(r1);				\
+	add	r4,r4,r0;				\
+	sub	r3,r3,reg;				\
+	cmpld	r3,r0;					\
+	bge+	.Lok2;					\
+.Lfail:							\
+	ld	r3,.LC1@toc(2);				\
+	bl	HIDDEN_JUMPTARGET (__fortify_fail);	\
+	nop;						\
+.Lok2:							\
+	mr	r3,r31;					\
+	mr	r4,r30;					\
+	cfi_restore_state;				\
+.Lok:
+
+#include <__longjmp-common.S>