diff options
| author | Nitin A Kamble <nitin.a.kamble@intel.com> | 2007-10-12 20:40:33 -0400 |
|---|---|---|
| committer | Avi Kivity <avi@qumranet.com> | 2008-01-30 10:52:53 -0500 |
| commit | d77a25074a8f845401f0eb786ebb8996e45d9e22 (patch) | |
| tree | 54729328075c2b822ebbb9266b9a23d4eeefd92c /drivers/kvm/x86_emulate.c | |
| parent | 3176bc3e59cc4e30ac10888f08124b31969a7a88 (diff) | |
KVM: x86 emulator: Implement emulation of instruction: inc & dec
Instructions:
inc r16/r32 (opcode 0x40-0x47)
dec r16/r32 (opcode 0x48-0x4f)
Signed-off-by: Nitin A Kamble <nitin.a.kamble@intel.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
Diffstat (limited to 'drivers/kvm/x86_emulate.c')
| -rw-r--r-- | drivers/kvm/x86_emulate.c | 20 |
1 files changed, 18 insertions, 2 deletions
diff --git a/drivers/kvm/x86_emulate.c b/drivers/kvm/x86_emulate.c index 75fd23bade9c..988c6498640f 100644 --- a/drivers/kvm/x86_emulate.c +++ b/drivers/kvm/x86_emulate.c | |||
| @@ -96,8 +96,12 @@ static u8 opcode_table[256] = { | |||
| 96 | ByteOp | DstMem | SrcReg | ModRM, DstMem | SrcReg | ModRM, | 96 | ByteOp | DstMem | SrcReg | ModRM, DstMem | SrcReg | ModRM, |
| 97 | ByteOp | DstReg | SrcMem | ModRM, DstReg | SrcMem | ModRM, | 97 | ByteOp | DstReg | SrcMem | ModRM, DstReg | SrcMem | ModRM, |
| 98 | 0, 0, 0, 0, | 98 | 0, 0, 0, 0, |
| 99 | /* 0x40 - 0x4F */ | 99 | /* 0x40 - 0x47 */ |
| 100 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, | 100 | ImplicitOps, ImplicitOps, ImplicitOps, ImplicitOps, |
| 101 | ImplicitOps, ImplicitOps, ImplicitOps, ImplicitOps, | ||
| 102 | /* 0x48 - 0x4F */ | ||
| 103 | ImplicitOps, ImplicitOps, ImplicitOps, ImplicitOps, | ||
| 104 | ImplicitOps, ImplicitOps, ImplicitOps, ImplicitOps, | ||
| 101 | /* 0x50 - 0x57 */ | 105 | /* 0x50 - 0x57 */ |
| 102 | ImplicitOps, ImplicitOps, ImplicitOps, ImplicitOps, | 106 | ImplicitOps, ImplicitOps, ImplicitOps, ImplicitOps, |
| 103 | ImplicitOps, ImplicitOps, ImplicitOps, ImplicitOps, | 107 | ImplicitOps, ImplicitOps, ImplicitOps, ImplicitOps, |
| @@ -1376,6 +1380,18 @@ special_insn: | |||
| 1376 | if (c->twobyte) | 1380 | if (c->twobyte) |
| 1377 | goto twobyte_special_insn; | 1381 | goto twobyte_special_insn; |
| 1378 | switch (c->b) { | 1382 | switch (c->b) { |
| 1383 | case 0x40 ... 0x47: /* inc r16/r32 */ | ||
| 1384 | c->dst.bytes = c->op_bytes; | ||
| 1385 | c->dst.ptr = (unsigned long *)&c->regs[c->b & 0x7]; | ||
| 1386 | c->dst.val = *c->dst.ptr; | ||
| 1387 | emulate_1op("inc", c->dst, ctxt->eflags); | ||
| 1388 | break; | ||
| 1389 | case 0x48 ... 0x4f: /* dec r16/r32 */ | ||
| 1390 | c->dst.bytes = c->op_bytes; | ||
| 1391 | c->dst.ptr = (unsigned long *)&c->regs[c->b & 0x7]; | ||
| 1392 | c->dst.val = *c->dst.ptr; | ||
| 1393 | emulate_1op("dec", c->dst, ctxt->eflags); | ||
| 1394 | break; | ||
| 1379 | case 0x50 ... 0x57: /* push reg */ | 1395 | case 0x50 ... 0x57: /* push reg */ |
| 1380 | if (c->op_bytes == 2) | 1396 | if (c->op_bytes == 2) |
| 1381 | c->src.val = (u16) c->regs[c->b & 0x7]; | 1397 | c->src.val = (u16) c->regs[c->b & 0x7]; |