* [Qemu-devel] [PATCH][MIPS] Enforce aligned pc
@ 2006-04-26 14:22 Marius Groeger
2006-04-26 22:07 ` Fabrice Bellard
0 siblings, 1 reply; 3+ messages in thread
From: Marius Groeger @ 2006-04-26 14:22 UTC (permalink / raw)
To: qemu-devel
[-- Attachment #1: Type: TEXT/PLAIN, Size: 105 bytes --]
Hi,
this patch makes qemu throw an exception when the PC is not aligned to
a word boundary.
--
Marius
[-- Attachment #2: Type: TEXT/PLAIN, Size: 498 bytes --]
--- target-mips/translate.c 23 Apr 2006 15:21:24 -0000 1.12
+++ target-mips/translate.c 26 Apr 2006 14:02:19 -0000
@@ -1320,6 +1707,12 @@
uint16_t op, op1;
int16_t imm;
+ /* make sure instructions are on a word boundary */
+ if (ctx->pc & 0x3) {
+ generate_exception(ctx, EXCP_AdEL);
+ return;
+ }
+
if ((ctx->hflags & MIPS_HFLAG_BMASK) == MIPS_HFLAG_BL) {
/* Handle blikely not taken case */
MIPS_DEBUG("blikely condition (%08x)", ctx->pc + 4);
^ permalink raw reply [flat|nested] 3+ messages in thread
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2006-04-26 14:22 [Qemu-devel] [PATCH][MIPS] Enforce aligned pc Marius Groeger
2006-04-26 22:07 ` Fabrice Bellard
2006-04-26 22:53 ` Thiemo Seufer
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