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PATCH: Add sysdeps/unix/sysv/linux/ia64/____longjmp_chk.S
- From: "H.J. Lu" <hongjiu dot lu at intel dot com>
- To: GNU C Library <libc-alpha at sourceware dot org>
- Date: Thu, 21 May 2009 17:56:19 -0700
- Subject: PATCH: Add sysdeps/unix/sysv/linux/ia64/____longjmp_chk.S
- Reply-to: "H.J. Lu" <hjl dot tools at gmail dot com>
Hi,
This patch adds sysdeps/unix/sysv/linux/ia64/____longjmp_chk.S.
H.J.
---
2009-05-21 H.J. Lu <hongjiu.lu@intel.com>
* sysdeps/unix/sysv/linux/ia64/____longjmp_chk.S: New.
* sysdeps/unix/sysv/linux/ia64/__longjmp.S: Updated.
--- sysdeps/unix/sysv/linux/ia64/____longjmp_chk.S.foo 2009-05-21 14:25:24.000000000 -0700
+++ sysdeps/unix/sysv/linux/ia64/____longjmp_chk.S 2009-05-21 17:44:18.000000000 -0700
@@ -0,0 +1,48 @@
+/* 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. */
+
+ .section .rodata.str1.8,"aMS",@progbits,1
+ .align 8
+.LC0:
+ .string "longjmp causes uninitialized stack frame"
+
+ .section .sdata,"aws",@progbits
+ .align 8
+ .type longjmp_msg,@object
+longjmp_msg:
+ data8 .LC0
+ .size longjmp_msg, .-longjmp_msg
+
+#define __longjmp ____longjmp_chk
+
+#ifdef PIC
+# define CALL_FAIL __GI___fortify_fail
+#else
+# define CALL_FAIL __fortify_fail
+#endif
+
+#define CHECK_RSP(reg) \
+ cmp.ltu p0, p8 = reg, r12; \
+(p8) br.cond.dpnt .Lok;; \
+ addl r28 = @ltoffx(longjmp_msg#), r1;; \
+ ld8.mov r28 = [r28], longjmp_msg#;; \
+ ld8 out0 = [r28]; \
+ br.call.sptk.many b0 = CALL_FAIL#;; \
+.Lok:
+
+#include "__longjmp.S"
--- sysdeps/unix/sysv/linux/ia64/__longjmp.S.foo 2009-05-21 13:01:25.000000000 -0700
+++ sysdeps/unix/sysv/linux/ia64/__longjmp.S 2009-05-21 14:32:27.000000000 -0700
@@ -42,7 +42,11 @@
/* __longjmp(__jmp_buf buf, int val) */
LEAF(__longjmp)
+#ifdef CHECK_RSP
+ alloc r8=ar.pfs,2,1,1,0
+#else
alloc r8=ar.pfs,2,1,0,0
+#endif
mov r27=ar.rsc
add r2=0x98,in0 // r2 <- &jmpbuf.orig_jmp_buf_addr
;;
@@ -70,14 +74,18 @@ LEAF(__longjmp)
add r3=8,in0 // r3 <- &jmpbuf.r1
shl r9=r25,r17
;;
+ ld8.fill.nta r28=[r2],16 // r28 <- jmpbuf.sp
or r25=r8,r9
;;
mov r26=ar.rnat
mov ar.unat=r25 // setup ar.unat (NaT bits for r1, r4-r7, and r12)
;;
- ld8.fill.nta sp=[r2],16 // r12 (sp)
+#ifdef CHECK_RSP
+ CHECK_RSP (r28)
+#endif
ld8.fill.nta gp=[r3],16 // r1 (gp)
dep r11=-1,r23,3,6 // r11 <- ia64_rse_rnat_addr(jmpbuf.ar_bsp)
+ mov sp=r28 // r12 (sp)
;;
ld8.nta r16=[r2],16 // caller's unat
ld8.nta r17=[r3],16 // fpsr