#define Priv (1<<27) /* instruction generates #GP if current CPL != 0 */
#define No64 (1<<28)
#define PageTable (1 << 29) /* instruction used to write page table */
+#define NotImpl (1 << 30) /* instruction is not implemented */
/* Source 2 operand type */
-#define Src2Shift (30)
+#define Src2Shift (31)
#define Src2None (OpNone << Src2Shift)
#define Src2CL (OpCL << Src2Shift)
#define Src2ImmByte (OpImmByte << Src2Shift)
memset(&seg_desc, 0, sizeof seg_desc);
- if ((seg <= VCPU_SREG_GS && ctxt->mode == X86EMUL_MODE_VM86)
- || ctxt->mode == X86EMUL_MODE_REAL) {
- /* set real mode segment descriptor */
+ if (ctxt->mode == X86EMUL_MODE_REAL) {
+ /* set real mode segment descriptor (keep limit etc. for
+ * unreal mode) */
ctxt->ops->get_segment(ctxt, &dummy, &seg_desc, NULL, seg);
set_desc_base(&seg_desc, selector << 4);
goto load;
+ } else if (seg <= VCPU_SREG_GS && ctxt->mode == X86EMUL_MODE_VM86) {
+ /* VM86 needs a clean new segment descriptor */
+ set_desc_base(&seg_desc, selector << 4);
+ set_desc_limit(&seg_desc, 0xffff);
+ seg_desc.type = 3;
+ seg_desc.p = 1;
+ seg_desc.s = 1;
+ seg_desc.dpl = 3;
+ goto load;
}
rpl = selector & 3;
#define DI(_y, _i) { .flags = (_y), .intercept = x86_intercept_##_i }
#define DIP(_y, _i, _p) { .flags = (_y), .intercept = x86_intercept_##_i, \
.check_perm = (_p) }
-#define N D(0)
+#define N D(NotImpl)
#define EXT(_f, _e) { .flags = ((_f) | RMExt), .u.group = (_e) }
#define G(_f, _g) { .flags = ((_f) | Group | ModRM), .u.group = (_g) }
#define GD(_f, _g) { .flags = ((_f) | GroupDual | ModRM), .u.gdual = (_g) }
I(SrcMemFAddr | ImplicitOps | Stack, em_call_far),
I(SrcMem | Stack, em_grp45),
I(SrcMemFAddr | ImplicitOps, em_grp45),
- I(SrcMem | Stack, em_grp45), N,
+ I(SrcMem | Stack, em_grp45), D(Undefined),
};
static const struct opcode group6[] = {
break;
case OpMem8:
ctxt->memop.bytes = 1;
+ if (ctxt->memop.type == OP_REG) {
+ ctxt->memop.addr.reg = decode_register(ctxt, ctxt->modrm_rm, 1);
+ fetch_register_operand(&ctxt->memop);
+ }
goto mem_common;
case OpMem16:
ctxt->memop.bytes = 2;
ctxt->intercept = opcode.intercept;
/* Unrecognised? */
- if (ctxt->d == 0 || (ctxt->d & Undefined))
+ if (ctxt->d == 0 || (ctxt->d & NotImpl))
return EMULATION_FAILED;
if (!(ctxt->d & VendorSpecific) && ctxt->only_vendor_specific_insn)
ctxt->mem_read.pos = 0;
- if (ctxt->mode == X86EMUL_MODE_PROT64 && (ctxt->d & No64)) {
+ if ((ctxt->mode == X86EMUL_MODE_PROT64 && (ctxt->d & No64)) ||
+ (ctxt->d & Undefined)) {
rc = emulate_ud(ctxt);
goto done;
}