diff options
Diffstat (limited to 'drivers/kvm/x86_emulate.c')
| -rw-r--r-- | drivers/kvm/x86_emulate.c | 77 |
1 files changed, 49 insertions, 28 deletions
diff --git a/drivers/kvm/x86_emulate.c b/drivers/kvm/x86_emulate.c index 9737c3b..a6ace30 100644 --- a/drivers/kvm/x86_emulate.c +++ b/drivers/kvm/x86_emulate.c @@ -212,7 +212,8 @@ static u16 twobyte_table[256] = { 0, 0, ByteOp | DstReg | SrcMem | ModRM | Mov, DstReg | SrcMem16 | ModRM | Mov, /* 0xC0 - 0xCF */ - 0, 0, 0, 0, 0, 0, 0, ImplicitOps | ModRM, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, DstMem | SrcReg | ModRM | Mov, 0, 0, 0, ImplicitOps | ModRM, + 0, 0, 0, 0, 0, 0, 0, 0, /* 0xD0 - 0xDF */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0xE0 - 0xEF */ @@ -596,11 +597,10 @@ x86_emulate_memop(struct x86_emulate_ctxt *ctxt, struct x86_emulate_ops *ops) case 0xf0: /* LOCK */ lock_prefix = 1; break; + case 0xf2: /* REPNE/REPNZ */ case 0xf3: /* REP/REPE/REPZ */ rep_prefix = 1; break; - case 0xf2: /* REPNE/REPNZ */ - break; default: goto done_prefixes; } @@ -825,6 +825,14 @@ done_prefixes: if (twobyte && b == 0x01 && modrm_reg == 7) break; srcmem_common: + /* + * For instructions with a ModR/M byte, switch to register + * access if Mod = 3. + */ + if ((d & ModRM) && modrm_mod == 3) { + src.type = OP_REG; + break; + } src.type = OP_MEM; src.ptr = (unsigned long *)cr2; src.val = 0; @@ -893,6 +901,14 @@ done_prefixes: dst.ptr = (unsigned long *)cr2; dst.bytes = (d & ByteOp) ? 1 : op_bytes; dst.val = 0; + /* + * For instructions with a ModR/M byte, switch to register + * access if Mod = 3. + */ + if ((d & ModRM) && modrm_mod == 3) { + dst.type = OP_REG; + break; + } if (d & BitOp) { unsigned long mask = ~(dst.bytes * 8 - 1); @@ -1083,31 +1099,6 @@ push: case 0xd2 ... 0xd3: /* Grp2 */ src.val = _regs[VCPU_REGS_RCX]; goto grp2; - case 0xe8: /* call (near) */ { - long int rel; - switch (op_bytes) { - case 2: - rel = insn_fetch(s16, 2, _eip); - break; - case 4: - rel = insn_fetch(s32, 4, _eip); - break; - case 8: - rel = insn_fetch(s64, 8, _eip); - break; - default: - DPRINTF("Call: Invalid op_bytes\n"); - goto cannot_emulate; - } - src.val = (unsigned long) _eip; - JMP_REL(rel); - goto push; - } - case 0xe9: /* jmp rel */ - case 0xeb: /* jmp rel short */ - JMP_REL(src.val); - no_wb = 1; /* Disable writeback. */ - break; case 0xf6 ... 0xf7: /* Grp3 */ switch (modrm_reg) { case 0 ... 1: /* test */ @@ -1350,6 +1341,32 @@ special_insn: case 0xae ... 0xaf: /* scas */ DPRINTF("Urk! I don't handle SCAS.\n"); goto cannot_emulate; + case 0xe8: /* call (near) */ { + long int rel; + switch (op_bytes) { + case 2: + rel = insn_fetch(s16, 2, _eip); + break; + case 4: + rel = insn_fetch(s32, 4, _eip); + break; + case 8: + rel = insn_fetch(s64, 8, _eip); + break; + default: + DPRINTF("Call: Invalid op_bytes\n"); + goto cannot_emulate; + } + src.val = (unsigned long) _eip; + JMP_REL(rel); + goto push; + } + case 0xe9: /* jmp rel */ + case 0xeb: /* jmp rel short */ + JMP_REL(src.val); + no_wb = 1; /* Disable writeback. */ + break; + } goto writeback; @@ -1501,6 +1518,10 @@ twobyte_insn: dst.bytes = op_bytes; dst.val = (d & ByteOp) ? (s8) src.val : (s16) src.val; break; + case 0xc3: /* movnti */ + dst.bytes = op_bytes; + dst.val = (op_bytes == 4) ? (u32) src.val : (u64) src.val; + break; } goto writeback; |