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KVM: x86 emulator: Clean up INT n/INTO/INT 3(CC/CD/CE) 

Call emulate_int() directly to avoid spaghetti goto's.

Signed-off-by: Takuya Yoshikawa <yoshikawa.takuya@oss.ntt.co.jp>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
This commit is contained in:
Takuya Yoshikawa 2011-05-29 22:02:55 +09:00 committed by Avi Kivity
parent 1bd5f469b2
commit 5c5df76b8b
1 changed files with 5 additions and 10 deletions
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15
arch/x86/kvm/emulate.c
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@ -3769,7 +3769,6 @@ int x86_emulate_insn(struct x86_emulate_ctxt *ctxt)
struct decode_cache *c = &ctxt->decode;
int rc = X86EMUL_CONTINUE;
int saved_dst_type = c->dst.type;
int irq; /* Used for int 3, int, and into */
c->mem_read.pos = 0;
@ -3963,18 +3962,14 @@ special_insn:
rc = emulate_load_segment(ctxt, VCPU_SREG_DS);
break;
case 0xcc: /* int3 */
irq = 3;
goto do_interrupt;
rc = emulate_int(ctxt, 3);
break;
case 0xcd: /* int n */
irq = c->src.val;
do_interrupt:
rc = emulate_int(ctxt, irq);
rc = emulate_int(ctxt, c->src.val);
break;
case 0xce: /* into */
if (ctxt->eflags & EFLG_OF) {
irq = 4;
goto do_interrupt;
}
if (ctxt->eflags & EFLG_OF)
rc = emulate_int(ctxt, 4);
break;
case 0xd0 ... 0xd1: /* Grp2 */
rc = em_grp2(ctxt);