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authorNitin A Kamble <nitin.a.kamble@intel.com>2007-06-19 11:16:04 +0300
committerAvi Kivity <avi@qumranet.com>2007-07-16 12:05:47 +0300
commit7f0aaee07b6afcf5a4ee8a1132447621d768076b (patch)
tree3eb2b7e51898db9ee355b2b4e07294ebf5bc44c0 /drivers
parent7700270ee3c1324c18f5b7c36ee5ba1a4165919a (diff)
KVM: Implement emulation of "pop reg" instruction (opcode 0x58-0x5f)
For use in real mode. Signed-off-by: Nitin A Kamble <nitin.a.kamble@intel.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/kvm/x86_emulate.c17
1 files changed, 15 insertions, 2 deletions
diff --git a/drivers/kvm/x86_emulate.c b/drivers/kvm/x86_emulate.c
index a4a84817b27..46c38063a10 100644
--- a/drivers/kvm/x86_emulate.c
+++ b/drivers/kvm/x86_emulate.c
@@ -98,8 +98,11 @@ static u8 opcode_table[256] = {
0, 0, 0, 0,
/* 0x40 - 0x4F */
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- /* 0x50 - 0x5F */
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ /* 0x50 - 0x57 */
+ 0, 0, 0, 0, 0, 0, 0, 0,
+ /* 0x58 - 0x5F */
+ ImplicitOps, ImplicitOps, ImplicitOps, ImplicitOps,
+ ImplicitOps, ImplicitOps, ImplicitOps, ImplicitOps,
/* 0x60 - 0x6F */
0, 0, 0, DstReg | SrcMem32 | ModRM | Mov /* movsxd (x86/64) */ ,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
@@ -1153,6 +1156,16 @@ special_insn:
case 0xf4: /* hlt */
ctxt->vcpu->halt_request = 1;
goto done;
+ case 0x58 ... 0x5f: /* pop reg */
+ dst.ptr = (unsigned long *)&_regs[b & 0x7];
+
+ if ((rc = ops->read_std(register_address(ctxt->ss_base,
+ _regs[VCPU_REGS_RSP]), dst.ptr, op_bytes, ctxt)) != 0)
+ goto done;
+
+ register_address_increment(_regs[VCPU_REGS_RSP], dst.bytes);
+ dst.orig_val = dst.val; /* Disable writeback. */
+ break;
}
goto writeback;