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| author |   Avi Kivity <avi@redhat.com> | 2010-08-18 14:51:45 +0300 |
|---|---|---|
| committer | Avi Kivity <avi@redhat.com> | 2010-10-24 10:51:12 +0200 |
| commit | 0ef753b8c323f5b8d75d7dc57ceef6b35982afdb (patch) | |
| tree | 194e86a361fb9b541ddd6e0dfd0eb3260330d959 /arch | |
| parent | KVM: x86 emulator: implement DAS (opcode 2F) (diff) | |
| download | linux-dev-0ef753b8c323f5b8d75d7dc57ceef6b35982afdb.tar.xz linux-dev-0ef753b8c323f5b8d75d7dc57ceef6b35982afdb.zip | |
KVM: x86 emulator: implement CALL FAR (FF /3)
Signed-off-by: Avi Kivity <avi@redhat.com>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/x86/kvm/emulate.c | 37 |
1 files changed, 36 insertions, 1 deletions
diff --git a/arch/x86/kvm/emulate.c b/arch/x86/kvm/emulate.c index 83ded7c03d12..313357793968 100644 --- a/arch/x86/kvm/emulate.c +++ b/arch/x86/kvm/emulate.c @@ -2214,6 +2214,40 @@ static int em_das(struct x86_emulate_ctxt *ctxt) return X86EMUL_CONTINUE; } +static int em_call_far(struct x86_emulate_ctxt *ctxt) +{ + struct decode_cache *c = &ctxt->decode; + u16 sel, old_cs; + ulong old_eip; + int rc; + + old_cs = ctxt->ops->get_segment_selector(VCPU_SREG_CS, ctxt->vcpu); + old_eip = c->eip; + + memcpy(&sel, c->src.valptr + c->op_bytes, 2); + if (load_segment_descriptor(ctxt, ctxt->ops, sel, VCPU_SREG_CS)) + return X86EMUL_CONTINUE; + + c->eip = 0; + memcpy(&c->eip, c->src.valptr, c->op_bytes); + + c->src.val = old_cs; + emulate_push(ctxt, ctxt->ops); + rc = writeback(ctxt, ctxt->ops); + if (rc != X86EMUL_CONTINUE) + return rc; + + c->src.val = old_eip; + emulate_push(ctxt, ctxt->ops); + rc = writeback(ctxt, ctxt->ops); + if (rc != X86EMUL_CONTINUE) + return rc; + + c->dst.type = OP_NONE; + + return X86EMUL_CONTINUE; +} + #define D(_y) { .flags = (_y) } #define N D(0) #define G(_f, _g) { .flags = ((_f) | Group), .u.group = (_g) } @@ -2241,7 +2275,8 @@ static struct opcode group4[] = { static struct opcode group5[] = { D(DstMem | SrcNone | ModRM | Lock), D(DstMem | SrcNone | ModRM | Lock), - D(SrcMem | ModRM | Stack), N, + D(SrcMem | ModRM | Stack), + I(SrcMemFAddr | ModRM | ImplicitOps | Stack, em_call_far), D(SrcMem | ModRM | Stack), D(SrcMemFAddr | ModRM | ImplicitOps), D(SrcMem | ModRM | Stack), N, }; |