diff options
| -rw-r--r-- | arch/x86/kvm/emulate.c | 107 |
1 files changed, 101 insertions, 6 deletions
diff --git a/arch/x86/kvm/emulate.c b/arch/x86/kvm/emulate.c index 1be5cd640e93..1cdfec5231d0 100644 --- a/arch/x86/kvm/emulate.c +++ b/arch/x86/kvm/emulate.c @@ -92,19 +92,22 @@ static u32 opcode_table[256] = { /* 0x00 - 0x07 */ ByteOp | DstMem | SrcReg | ModRM, DstMem | SrcReg | ModRM, ByteOp | DstReg | SrcMem | ModRM, DstReg | SrcMem | ModRM, - ByteOp | DstAcc | SrcImm, DstAcc | SrcImm, 0, 0, + ByteOp | DstAcc | SrcImm, DstAcc | SrcImm, + ImplicitOps | Stack, ImplicitOps | Stack, /* 0x08 - 0x0F */ ByteOp | DstMem | SrcReg | ModRM, DstMem | SrcReg | ModRM, ByteOp | DstReg | SrcMem | ModRM, DstReg | SrcMem | ModRM, - 0, 0, 0, 0, + 0, 0, ImplicitOps | Stack, 0, /* 0x10 - 0x17 */ ByteOp | DstMem | SrcReg | ModRM, DstMem | SrcReg | ModRM, ByteOp | DstReg | SrcMem | ModRM, DstReg | SrcMem | ModRM, - ByteOp | DstAcc | SrcImm, DstAcc | SrcImm, 0, 0, + ByteOp | DstAcc | SrcImm, DstAcc | SrcImm, + ImplicitOps | Stack, ImplicitOps | Stack, /* 0x18 - 0x1F */ ByteOp | DstMem | SrcReg | ModRM, DstMem | SrcReg | ModRM, ByteOp | DstReg | SrcMem | ModRM, DstReg | SrcMem | ModRM, - ByteOp | DstAcc | SrcImm, DstAcc | SrcImm, 0, 0, + ByteOp | DstAcc | SrcImm, DstAcc | SrcImm, + ImplicitOps | Stack, ImplicitOps | Stack, /* 0x20 - 0x27 */ ByteOp | DstMem | SrcReg | ModRM, DstMem | SrcReg | ModRM, ByteOp | DstReg | SrcMem | ModRM, DstReg | SrcMem | ModRM, @@ -244,11 +247,13 @@ static u32 twobyte_table[256] = { /* 0x90 - 0x9F */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0xA0 - 0xA7 */ - 0, 0, 0, DstMem | SrcReg | ModRM | BitOp, + ImplicitOps | Stack, ImplicitOps | Stack, + 0, DstMem | SrcReg | ModRM | BitOp, DstMem | SrcReg | Src2ImmByte | ModRM, DstMem | SrcReg | Src2CL | ModRM, 0, 0, /* 0xA8 - 0xAF */ - 0, 0, 0, DstMem | SrcReg | ModRM | BitOp, + ImplicitOps | Stack, ImplicitOps | Stack, + 0, DstMem | SrcReg | ModRM | BitOp, DstMem | SrcReg | Src2ImmByte | ModRM, DstMem | SrcReg | Src2CL | ModRM, ModRM, 0, @@ -1186,6 +1191,32 @@ static int emulate_pop(struct x86_emulate_ctxt *ctxt, return rc; } +static void emulate_push_sreg(struct x86_emulate_ctxt *ctxt, int seg) +{ + struct decode_cache *c = &ctxt->decode; + struct kvm_segment segment; + + kvm_x86_ops->get_segment(ctxt->vcpu, &segment, seg); + + c->src.val = segment.selector; + emulate_push(ctxt); +} + +static int emulate_pop_sreg(struct x86_emulate_ctxt *ctxt, + struct x86_emulate_ops *ops, int seg) +{ + struct decode_cache *c = &ctxt->decode; + unsigned long selector; + int rc; + + rc = emulate_pop(ctxt, ops, &selector, c->op_bytes); + if (rc != 0) + return rc; + + rc = kvm_load_segment_descriptor(ctxt->vcpu, (u16)selector, 1, seg); + return rc; +} + static inline int emulate_grp1a(struct x86_emulate_ctxt *ctxt, struct x86_emulate_ops *ops) { @@ -1707,18 +1738,66 @@ special_insn: add: /* add */ emulate_2op_SrcV("add", c->src, c->dst, ctxt->eflags); break; + case 0x06: /* push es */ + if (ctxt->mode == X86EMUL_MODE_PROT64) + goto cannot_emulate; + + emulate_push_sreg(ctxt, VCPU_SREG_ES); + break; + case 0x07: /* pop es */ + if (ctxt->mode == X86EMUL_MODE_PROT64) + goto cannot_emulate; + + rc = emulate_pop_sreg(ctxt, ops, VCPU_SREG_ES); + if (rc != 0) + goto done; + break; case 0x08 ... 0x0d: or: /* or */ emulate_2op_SrcV("or", c->src, c->dst, ctxt->eflags); break; + case 0x0e: /* push cs */ + if (ctxt->mode == X86EMUL_MODE_PROT64) + goto cannot_emulate; + + emulate_push_sreg(ctxt, VCPU_SREG_CS); + break; case 0x10 ... 0x15: adc: /* adc */ emulate_2op_SrcV("adc", c->src, c->dst, ctxt->eflags); break; + case 0x16: /* push ss */ + if (ctxt->mode == X86EMUL_MODE_PROT64) + goto cannot_emulate; + + emulate_push_sreg(ctxt, VCPU_SREG_SS); + break; + case 0x17: /* pop ss */ + if (ctxt->mode == X86EMUL_MODE_PROT64) + goto cannot_emulate; + + rc = emulate_pop_sreg(ctxt, ops, VCPU_SREG_SS); + if (rc != 0) + goto done; + break; case 0x18 ... 0x1d: sbb: /* sbb */ emulate_2op_SrcV("sbb", c->src, c->dst, ctxt->eflags); break; + case 0x1e: /* push ds */ + if (ctxt->mode == X86EMUL_MODE_PROT64) + goto cannot_emulate; + + emulate_push_sreg(ctxt, VCPU_SREG_DS); + break; + case 0x1f: /* pop ds */ + if (ctxt->mode == X86EMUL_MODE_PROT64) + goto cannot_emulate; + + rc = emulate_pop_sreg(ctxt, ops, VCPU_SREG_DS); + if (rc != 0) + goto done; + break; case 0x20 ... 0x25: and: /* and */ emulate_2op_SrcV("and", c->src, c->dst, ctxt->eflags); @@ -2297,6 +2376,14 @@ twobyte_insn: jmp_rel(c, c->src.val); c->dst.type = OP_NONE; break; + case 0xa0: /* push fs */ + emulate_push_sreg(ctxt, VCPU_SREG_FS); + break; + case 0xa1: /* pop fs */ + rc = emulate_pop_sreg(ctxt, ops, VCPU_SREG_FS); + if (rc != 0) + goto done; + break; case 0xa3: bt: /* bt */ c->dst.type = OP_NONE; @@ -2308,6 +2395,14 @@ twobyte_insn: case 0xa5: /* shld cl, r, r/m */ emulate_2op_cl("shld", c->src2, c->src, c->dst, ctxt->eflags); break; + case 0xa8: /* push gs */ + emulate_push_sreg(ctxt, VCPU_SREG_GS); + break; + case 0xa9: /* pop gs */ + rc = emulate_pop_sreg(ctxt, ops, VCPU_SREG_GS); + if (rc != 0) + goto done; + break; case 0xab: bts: /* bts */ /* only subword offset */ |