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KVM: x86 emulator: modify 'lods', and 'stos' not to depend on CR2 

The current 'lods' and 'stos' is depending on incoming CR2 rather than decode
memory address from registers.

Signed-off-by: Sheng Yang <sheng.yang@intel.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
This commit is contained in:
Sheng Yang 2007-11-15 14:52:28 +08:00 committed by Avi Kivity
parent f8c16bbaa9
commit a7e6c88a78
1 changed files with 10 additions and 4 deletions
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14
drivers/kvm/x86_emulate.c
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@ -1528,7 +1528,9 @@ x86_emulate_insn(struct x86_emulate_ctxt *ctxt, struct x86_emulate_ops *ops)
case 0xaa ... 0xab: /* stos */
c->dst.type = OP_MEM;
c->dst.bytes = (c->d & ByteOp) ? 1 : c->op_bytes;
c->dst.ptr = (unsigned long *)cr2;
c->dst.ptr = (unsigned long *)register_address(
ctxt->es_base,
c->regs[VCPU_REGS_RDI]);
c->dst.val = c->regs[VCPU_REGS_RAX];
register_address_increment(c->regs[VCPU_REGS_RDI],
(ctxt->eflags & EFLG_DF) ? -c->dst.bytes
@ -1538,9 +1540,13 @@ x86_emulate_insn(struct x86_emulate_ctxt *ctxt, struct x86_emulate_ops *ops)
c->dst.type = OP_REG;
c->dst.bytes = (c->d & ByteOp) ? 1 : c->op_bytes;
c->dst.ptr = (unsigned long *)&c->regs[VCPU_REGS_RAX];
if ((rc = ops->read_emulated(cr2, &c->dst.val,
c->dst.bytes,
ctxt->vcpu)) != 0)
if ((rc = ops->read_emulated(register_address(
c->override_base ? *c->override_base :
ctxt->ds_base,
c->regs[VCPU_REGS_RSI]),
&c->dst.val,
c->dst.bytes,
ctxt->vcpu)) != 0)
goto done;
register_address_increment(c->regs[VCPU_REGS_RSI],
(ctxt->eflags & EFLG_DF) ? -c->dst.bytes