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[Qemu-devel] [5963] target-i386: Fix jmp im on x86_64 when executing 32-
From: |
Aurelien Jarno |
Subject: |
[Qemu-devel] [5963] target-i386: Fix jmp im on x86_64 when executing 32-bit code |
Date: |
Wed, 10 Dec 2008 15:02:16 +0000 |
Revision: 5963
http://svn.sv.gnu.org/viewvc/?view=rev&root=qemu&revision=5963
Author: aurel32
Date: 2008-12-10 15:02:16 +0000 (Wed, 10 Dec 2008)
Log Message:
-----------
target-i386: Fix jmp im on x86_64 when executing 32-bit code
When running grub-install (32-bit) on an x86_64 Linux system in qemu, it
hangs on a pagefault forever, because an integer overflow occurs on the
IP on "jmp im". This patch masks overflows for 32 bit IPs on a 64 bit
system, just like it is done for 16 bit IPs already.
Using this patch, x86_64 openSUSE installation works again.
Signed-off-by: Alexander Graf <address@hidden>
Signed-off-by: Kevin Wolf <address@hidden>
Signed-off-by: Aurelien Jarno <address@hidden>
Modified Paths:
--------------
trunk/target-i386/translate.c
Modified: trunk/target-i386/translate.c
===================================================================
--- trunk/target-i386/translate.c 2008-12-10 15:02:07 UTC (rev 5962)
+++ trunk/target-i386/translate.c 2008-12-10 15:02:16 UTC (rev 5963)
@@ -6165,6 +6165,8 @@
tval += s->pc - s->cs_base;
if (s->dflag == 0)
tval &= 0xffff;
+ else if(!CODE64(s))
+ tval &= 0xffffffff;
gen_jmp(s, tval);
break;
case 0xea: /* ljmp im */
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