diff options
Diffstat (limited to 'drivers/kvm')
| -rw-r--r-- | drivers/kvm/x86_emulate.c | 99 |
1 files changed, 49 insertions, 50 deletions
diff --git a/drivers/kvm/x86_emulate.c b/drivers/kvm/x86_emulate.c index 18c2b2c..e4ce34c 100644 --- a/drivers/kvm/x86_emulate.c +++ b/drivers/kvm/x86_emulate.c @@ -978,19 +978,8 @@ push: dst.val = src.val; lock_prefix = 1; break; - case 0xa0 ... 0xa1: /* mov */ - dst.ptr = (unsigned long *)&_regs[VCPU_REGS_RAX]; - dst.val = src.val; - _eip += ad_bytes; /* skip src displacement */ - break; - case 0xa2 ... 0xa3: /* mov */ - dst.val = (unsigned long)_regs[VCPU_REGS_RAX]; - _eip += ad_bytes; /* skip dst displacement */ - break; case 0x88 ... 0x8b: /* mov */ - case 0xc6 ... 0xc7: /* mov (sole member of Grp11) */ - dst.val = src.val; - break; + goto mov; case 0x8f: /* pop (sole member of Grp1a) */ /* 64-bit mode: POP always pops a 64-bit operand. */ if (mode == X86EMUL_MODE_PROT64) @@ -1001,6 +990,15 @@ push: goto done; register_address_increment(_regs[VCPU_REGS_RSP], dst.bytes); break; + case 0xa0 ... 0xa1: /* mov */ + dst.ptr = (unsigned long *)&_regs[VCPU_REGS_RAX]; + dst.val = src.val; + _eip += ad_bytes; /* skip src displacement */ + break; + case 0xa2 ... 0xa3: /* mov */ + dst.val = (unsigned long)_regs[VCPU_REGS_RAX]; + _eip += ad_bytes; /* skip dst displacement */ + break; case 0xc0 ... 0xc1: grp2: /* Grp2 */ switch (modrm_reg) { @@ -1028,6 +1026,10 @@ push: break; } break; + case 0xc6 ... 0xc7: /* mov (sole member of Grp11) */ + mov: + dst.val = src.val; + break; case 0xd0 ... 0xd1: /* Grp2 */ src.val = 1; goto grp2; @@ -1186,6 +1188,17 @@ special_insn: dst.ptr = (void *) register_address( ctxt->ss_base, _regs[VCPU_REGS_RSP]); break; + case 0x58 ... 0x5f: /* pop reg */ + dst.ptr = (unsigned long *)&_regs[b & 0x7]; + pop_instruction: + if ((rc = ops->read_std(register_address(ctxt->ss_base, + _regs[VCPU_REGS_RSP]), dst.ptr, op_bytes, ctxt->vcpu)) + != 0) + goto done; + + register_address_increment(_regs[VCPU_REGS_RSP], op_bytes); + no_wb = 1; /* Disable writeback. */ + break; case 0x6c: /* insb */ case 0x6d: /* insw/insd */ if (kvm_emulate_pio_string(ctxt->vcpu, NULL, @@ -1217,12 +1230,15 @@ special_insn: ) == 0) return -1; return 0; - case 0x9c: /* pushf */ src.val = (unsigned long) _eflags; goto push; - break; - + case 0xc3: /* ret */ + dst.ptr = &_eip; + goto pop_instruction; + case 0xf4: /* hlt */ + ctxt->vcpu->halt_request = 1; + goto done; } if (rep_prefix) { if (_regs[VCPU_REGS_RCX] == 0) { @@ -1271,24 +1287,7 @@ special_insn: case 0xae ... 0xaf: /* scas */ DPRINTF("Urk! I don't handle SCAS.\n"); goto cannot_emulate; - case 0xf4: /* hlt */ - ctxt->vcpu->halt_request = 1; - goto done; - case 0xc3: /* ret */ - dst.ptr = &_eip; - goto pop_instruction; - case 0x58 ... 0x5f: /* pop reg */ - dst.ptr = (unsigned long *)&_regs[b & 0x7]; - -pop_instruction: - if ((rc = ops->read_std(register_address(ctxt->ss_base, - _regs[VCPU_REGS_RSP]), dst.ptr, op_bytes, ctxt->vcpu)) - != 0) - goto done; - register_address_increment(_regs[VCPU_REGS_RSP], op_bytes); - no_wb = 1; /* Disable writeback. */ - break; } goto writeback; @@ -1382,6 +1381,16 @@ twobyte_insn: /* Odd cmov opcodes (lsb == 1) have inverted sense. */ no_wb ^= b & 1; break; + case 0xa3: + bt: /* bt */ + src.val &= (dst.bytes << 3) - 1; /* only subword offset */ + emulate_2op_SrcV_nobyte("bt", src, dst, _eflags); + break; + case 0xab: + bts: /* bts */ + src.val &= (dst.bytes << 3) - 1; /* only subword offset */ + emulate_2op_SrcV_nobyte("bts", src, dst, _eflags); + break; case 0xb0 ... 0xb1: /* cmpxchg */ /* * Save real source value, then compare EAX against @@ -1399,30 +1408,15 @@ twobyte_insn: dst.ptr = (unsigned long *)&_regs[VCPU_REGS_RAX]; } break; - case 0xa3: - bt: /* bt */ - src.val &= (dst.bytes << 3) - 1; /* only subword offset */ - emulate_2op_SrcV_nobyte("bt", src, dst, _eflags); - break; case 0xb3: btr: /* btr */ src.val &= (dst.bytes << 3) - 1; /* only subword offset */ emulate_2op_SrcV_nobyte("btr", src, dst, _eflags); break; - case 0xab: - bts: /* bts */ - src.val &= (dst.bytes << 3) - 1; /* only subword offset */ - emulate_2op_SrcV_nobyte("bts", src, dst, _eflags); - break; case 0xb6 ... 0xb7: /* movzx */ dst.bytes = op_bytes; dst.val = (d & ByteOp) ? (u8) src.val : (u16) src.val; break; - case 0xbb: - btc: /* btc */ - src.val &= (dst.bytes << 3) - 1; /* only subword offset */ - emulate_2op_SrcV_nobyte("btc", src, dst, _eflags); - break; case 0xba: /* Grp8 */ switch (modrm_reg & 3) { case 0: @@ -1435,6 +1429,11 @@ twobyte_insn: goto btc; } break; + case 0xbb: + btc: /* btc */ + src.val &= (dst.bytes << 3) - 1; /* only subword offset */ + emulate_2op_SrcV_nobyte("btc", src, dst, _eflags); + break; case 0xbe ... 0xbf: /* movsx */ dst.bytes = op_bytes; dst.val = (d & ByteOp) ? (s8) src.val : (s16) src.val; @@ -1446,14 +1445,14 @@ twobyte_special_insn: /* Disable writeback. */ no_wb = 1; switch (b) { + case 0x06: + emulate_clts(ctxt->vcpu); + break; case 0x09: /* wbinvd */ break; case 0x0d: /* GrpP (prefetch) */ case 0x18: /* Grp16 (prefetch/nop) */ break; - case 0x06: - emulate_clts(ctxt->vcpu); - break; case 0x20: /* mov cr, reg */ if (modrm_mod != 3) goto cannot_emulate; |
