Lines Matching refs:ctxt
212 int (*execute)(struct x86_emulate_ctxt *ctxt);
221 int (*check_perm)(struct x86_emulate_ctxt *ctxt);
260 static ulong reg_read(struct x86_emulate_ctxt *ctxt, unsigned nr) in reg_read() argument
262 if (!(ctxt->regs_valid & (1 << nr))) { in reg_read()
263 ctxt->regs_valid |= 1 << nr; in reg_read()
264 ctxt->_regs[nr] = ctxt->ops->read_gpr(ctxt, nr); in reg_read()
266 return ctxt->_regs[nr]; in reg_read()
269 static ulong *reg_write(struct x86_emulate_ctxt *ctxt, unsigned nr) in reg_write() argument
271 ctxt->regs_valid |= 1 << nr; in reg_write()
272 ctxt->regs_dirty |= 1 << nr; in reg_write()
273 return &ctxt->_regs[nr]; in reg_write()
276 static ulong *reg_rmw(struct x86_emulate_ctxt *ctxt, unsigned nr) in reg_rmw() argument
278 reg_read(ctxt, nr); in reg_rmw()
279 return reg_write(ctxt, nr); in reg_rmw()
282 static void writeback_registers(struct x86_emulate_ctxt *ctxt) in writeback_registers() argument
286 for_each_set_bit(reg, (ulong *)&ctxt->regs_dirty, 16) in writeback_registers()
287 ctxt->ops->write_gpr(ctxt, reg, ctxt->_regs[reg]); in writeback_registers()
290 static void invalidate_registers(struct x86_emulate_ctxt *ctxt) in invalidate_registers() argument
292 ctxt->regs_dirty = 0; in invalidate_registers()
293 ctxt->regs_valid = 0; in invalidate_registers()
309 static int fastop(struct x86_emulate_ctxt *ctxt, void (*fop)(struct fastop *));
436 static int emulator_check_intercept(struct x86_emulate_ctxt *ctxt, in emulator_check_intercept() argument
442 .rep_prefix = ctxt->rep_prefix, in emulator_check_intercept()
443 .modrm_mod = ctxt->modrm_mod, in emulator_check_intercept()
444 .modrm_reg = ctxt->modrm_reg, in emulator_check_intercept()
445 .modrm_rm = ctxt->modrm_rm, in emulator_check_intercept()
446 .src_val = ctxt->src.val64, in emulator_check_intercept()
447 .dst_val = ctxt->dst.val64, in emulator_check_intercept()
448 .src_bytes = ctxt->src.bytes, in emulator_check_intercept()
449 .dst_bytes = ctxt->dst.bytes, in emulator_check_intercept()
450 .ad_bytes = ctxt->ad_bytes, in emulator_check_intercept()
451 .next_rip = ctxt->eip, in emulator_check_intercept()
454 return ctxt->ops->intercept(ctxt, &info, stage); in emulator_check_intercept()
481 static inline unsigned long ad_mask(struct x86_emulate_ctxt *ctxt) in ad_mask() argument
483 return (1UL << (ctxt->ad_bytes << 3)) - 1; in ad_mask()
486 static ulong stack_mask(struct x86_emulate_ctxt *ctxt) in stack_mask() argument
491 if (ctxt->mode == X86EMUL_MODE_PROT64) in stack_mask()
493 ctxt->ops->get_segment(ctxt, &sel, &ss, NULL, VCPU_SREG_SS); in stack_mask()
497 static int stack_size(struct x86_emulate_ctxt *ctxt) in stack_size() argument
499 return (__fls(stack_mask(ctxt)) + 1) >> 3; in stack_size()
504 address_mask(struct x86_emulate_ctxt *ctxt, unsigned long reg) in address_mask() argument
506 if (ctxt->ad_bytes == sizeof(unsigned long)) in address_mask()
509 return reg & ad_mask(ctxt); in address_mask()
513 register_address(struct x86_emulate_ctxt *ctxt, int reg) in register_address() argument
515 return address_mask(ctxt, reg_read(ctxt, reg)); in register_address()
524 register_address_increment(struct x86_emulate_ctxt *ctxt, int reg, int inc) in register_address_increment() argument
528 if (ctxt->ad_bytes == sizeof(unsigned long)) in register_address_increment()
531 mask = ad_mask(ctxt); in register_address_increment()
532 masked_increment(reg_rmw(ctxt, reg), mask, inc); in register_address_increment()
535 static void rsp_increment(struct x86_emulate_ctxt *ctxt, int inc) in rsp_increment() argument
537 masked_increment(reg_rmw(ctxt, VCPU_REGS_RSP), stack_mask(ctxt), inc); in rsp_increment()
547 static unsigned long seg_base(struct x86_emulate_ctxt *ctxt, int seg) in seg_base() argument
549 if (ctxt->mode == X86EMUL_MODE_PROT64 && seg < VCPU_SREG_FS) in seg_base()
552 return ctxt->ops->get_cached_segment_base(ctxt, seg); in seg_base()
555 static int emulate_exception(struct x86_emulate_ctxt *ctxt, int vec, in emulate_exception() argument
559 ctxt->exception.vector = vec; in emulate_exception()
560 ctxt->exception.error_code = error; in emulate_exception()
561 ctxt->exception.error_code_valid = valid; in emulate_exception()
565 static int emulate_db(struct x86_emulate_ctxt *ctxt) in emulate_db() argument
567 return emulate_exception(ctxt, DB_VECTOR, 0, false); in emulate_db()
570 static int emulate_gp(struct x86_emulate_ctxt *ctxt, int err) in emulate_gp() argument
572 return emulate_exception(ctxt, GP_VECTOR, err, true); in emulate_gp()
575 static int emulate_ss(struct x86_emulate_ctxt *ctxt, int err) in emulate_ss() argument
577 return emulate_exception(ctxt, SS_VECTOR, err, true); in emulate_ss()
580 static int emulate_ud(struct x86_emulate_ctxt *ctxt) in emulate_ud() argument
582 return emulate_exception(ctxt, UD_VECTOR, 0, false); in emulate_ud()
585 static int emulate_ts(struct x86_emulate_ctxt *ctxt, int err) in emulate_ts() argument
587 return emulate_exception(ctxt, TS_VECTOR, err, true); in emulate_ts()
590 static int emulate_de(struct x86_emulate_ctxt *ctxt) in emulate_de() argument
592 return emulate_exception(ctxt, DE_VECTOR, 0, false); in emulate_de()
595 static int emulate_nm(struct x86_emulate_ctxt *ctxt) in emulate_nm() argument
597 return emulate_exception(ctxt, NM_VECTOR, 0, false); in emulate_nm()
600 static u16 get_segment_selector(struct x86_emulate_ctxt *ctxt, unsigned seg) in get_segment_selector() argument
605 ctxt->ops->get_segment(ctxt, &selector, &desc, NULL, seg); in get_segment_selector()
609 static void set_segment_selector(struct x86_emulate_ctxt *ctxt, u16 selector, in set_segment_selector() argument
616 ctxt->ops->get_segment(ctxt, &dummy, &desc, &base3, seg); in set_segment_selector()
617 ctxt->ops->set_segment(ctxt, selector, &desc, base3, seg); in set_segment_selector()
628 static bool insn_aligned(struct x86_emulate_ctxt *ctxt, unsigned size) in insn_aligned() argument
633 if (ctxt->d & Aligned) in insn_aligned()
635 else if (ctxt->d & Unaligned) in insn_aligned()
637 else if (ctxt->d & Avx) in insn_aligned()
643 static __always_inline int __linearize(struct x86_emulate_ctxt *ctxt, in __linearize() argument
655 la = seg_base(ctxt, addr.seg) + addr.ea; in __linearize()
667 usable = ctxt->ops->get_segment(ctxt, &sel, &desc, NULL, in __linearize()
672 if ((((ctxt->mode != X86EMUL_MODE_REAL) && (desc.type & 8)) in __linearize()
697 if (insn_aligned(ctxt, size) && ((la & (size - 1)) != 0)) in __linearize()
698 return emulate_gp(ctxt, 0); in __linearize()
703 return emulate_ss(ctxt, 0); in __linearize()
705 return emulate_gp(ctxt, 0); in __linearize()
708 static int linearize(struct x86_emulate_ctxt *ctxt, in linearize() argument
714 return __linearize(ctxt, addr, &max_size, size, write, false, in linearize()
715 ctxt->mode, linear); in linearize()
718 static inline int assign_eip(struct x86_emulate_ctxt *ctxt, ulong dst, in assign_eip() argument
727 if (ctxt->op_bytes != sizeof(unsigned long)) in assign_eip()
728 addr.ea = dst & ((1UL << (ctxt->op_bytes << 3)) - 1); in assign_eip()
729 rc = __linearize(ctxt, addr, &max_size, 1, false, true, mode, &linear); in assign_eip()
731 ctxt->_eip = addr.ea; in assign_eip()
735 static inline int assign_eip_near(struct x86_emulate_ctxt *ctxt, ulong dst) in assign_eip_near() argument
737 return assign_eip(ctxt, dst, ctxt->mode); in assign_eip_near()
740 static int assign_eip_far(struct x86_emulate_ctxt *ctxt, ulong dst, in assign_eip_far() argument
743 enum x86emul_mode mode = ctxt->mode; in assign_eip_far()
747 if (ctxt->mode >= X86EMUL_MODE_PROT16) { in assign_eip_far()
751 ctxt->ops->get_msr(ctxt, MSR_EFER, &efer); in assign_eip_far()
760 rc = assign_eip(ctxt, dst, mode); in assign_eip_far()
762 ctxt->mode = mode; in assign_eip_far()
766 static inline int jmp_rel(struct x86_emulate_ctxt *ctxt, int rel) in jmp_rel() argument
768 return assign_eip_near(ctxt, ctxt->_eip + rel); in jmp_rel()
771 static int segmented_read_std(struct x86_emulate_ctxt *ctxt, in segmented_read_std() argument
779 rc = linearize(ctxt, addr, size, false, &linear); in segmented_read_std()
782 return ctxt->ops->read_std(ctxt, linear, data, size, &ctxt->exception); in segmented_read_std()
789 static int __do_insn_fetch_bytes(struct x86_emulate_ctxt *ctxt, int op_size) in __do_insn_fetch_bytes() argument
794 int cur_size = ctxt->fetch.end - ctxt->fetch.data; in __do_insn_fetch_bytes()
796 .ea = ctxt->eip + cur_size }; in __do_insn_fetch_bytes()
808 rc = __linearize(ctxt, addr, &max_size, 0, false, true, ctxt->mode, in __do_insn_fetch_bytes()
823 return emulate_gp(ctxt, 0); in __do_insn_fetch_bytes()
825 rc = ctxt->ops->fetch(ctxt, linear, ctxt->fetch.end, in __do_insn_fetch_bytes()
826 size, &ctxt->exception); in __do_insn_fetch_bytes()
829 ctxt->fetch.end += size; in __do_insn_fetch_bytes()
833 static __always_inline int do_insn_fetch_bytes(struct x86_emulate_ctxt *ctxt, in do_insn_fetch_bytes() argument
836 unsigned done_size = ctxt->fetch.end - ctxt->fetch.ptr; in do_insn_fetch_bytes()
839 return __do_insn_fetch_bytes(ctxt, size - done_size); in do_insn_fetch_bytes()
851 ctxt->_eip += sizeof(_type); \
852 _x = *(_type __aligned(1) *) ctxt->fetch.ptr; \
853 ctxt->fetch.ptr += sizeof(_type); \
862 ctxt->_eip += (_size); \
863 memcpy(_arr, ctxt->fetch.ptr, _size); \
864 ctxt->fetch.ptr += (_size); \
872 static void *decode_register(struct x86_emulate_ctxt *ctxt, u8 modrm_reg, in decode_register() argument
876 int highbyte_regs = (ctxt->rex_prefix == 0) && byteop; in decode_register()
879 p = (unsigned char *)reg_rmw(ctxt, modrm_reg & 3) + 1; in decode_register()
881 p = reg_rmw(ctxt, modrm_reg); in decode_register()
885 static int read_descriptor(struct x86_emulate_ctxt *ctxt, in read_descriptor() argument
894 rc = segmented_read_std(ctxt, addr, size, 2); in read_descriptor()
898 rc = segmented_read_std(ctxt, addr, address, op_bytes); in read_descriptor()
946 static int em_bsf_c(struct x86_emulate_ctxt *ctxt) in em_bsf_c() argument
949 if (ctxt->src.val == 0) in em_bsf_c()
950 ctxt->dst.type = OP_NONE; in em_bsf_c()
951 return fastop(ctxt, em_bsf); in em_bsf_c()
954 static int em_bsr_c(struct x86_emulate_ctxt *ctxt) in em_bsr_c() argument
957 if (ctxt->src.val == 0) in em_bsr_c()
958 ctxt->dst.type = OP_NONE; in em_bsr_c()
959 return fastop(ctxt, em_bsr); in em_bsr_c()
991 static void read_sse_reg(struct x86_emulate_ctxt *ctxt, sse128_t *data, int reg) in read_sse_reg() argument
993 ctxt->ops->get_fpu(ctxt); in read_sse_reg()
1015 ctxt->ops->put_fpu(ctxt); in read_sse_reg()
1018 static void write_sse_reg(struct x86_emulate_ctxt *ctxt, sse128_t *data, in write_sse_reg() argument
1021 ctxt->ops->get_fpu(ctxt); in write_sse_reg()
1043 ctxt->ops->put_fpu(ctxt); in write_sse_reg()
1046 static void read_mmx_reg(struct x86_emulate_ctxt *ctxt, u64 *data, int reg) in read_mmx_reg() argument
1048 ctxt->ops->get_fpu(ctxt); in read_mmx_reg()
1060 ctxt->ops->put_fpu(ctxt); in read_mmx_reg()
1063 static void write_mmx_reg(struct x86_emulate_ctxt *ctxt, u64 *data, int reg) in write_mmx_reg() argument
1065 ctxt->ops->get_fpu(ctxt); in write_mmx_reg()
1077 ctxt->ops->put_fpu(ctxt); in write_mmx_reg()
1080 static int em_fninit(struct x86_emulate_ctxt *ctxt) in em_fninit() argument
1082 if (ctxt->ops->get_cr(ctxt, 0) & (X86_CR0_TS | X86_CR0_EM)) in em_fninit()
1083 return emulate_nm(ctxt); in em_fninit()
1085 ctxt->ops->get_fpu(ctxt); in em_fninit()
1087 ctxt->ops->put_fpu(ctxt); in em_fninit()
1091 static int em_fnstcw(struct x86_emulate_ctxt *ctxt) in em_fnstcw() argument
1095 if (ctxt->ops->get_cr(ctxt, 0) & (X86_CR0_TS | X86_CR0_EM)) in em_fnstcw()
1096 return emulate_nm(ctxt); in em_fnstcw()
1098 ctxt->ops->get_fpu(ctxt); in em_fnstcw()
1100 ctxt->ops->put_fpu(ctxt); in em_fnstcw()
1102 ctxt->dst.val = fcw; in em_fnstcw()
1107 static int em_fnstsw(struct x86_emulate_ctxt *ctxt) in em_fnstsw() argument
1111 if (ctxt->ops->get_cr(ctxt, 0) & (X86_CR0_TS | X86_CR0_EM)) in em_fnstsw()
1112 return emulate_nm(ctxt); in em_fnstsw()
1114 ctxt->ops->get_fpu(ctxt); in em_fnstsw()
1116 ctxt->ops->put_fpu(ctxt); in em_fnstsw()
1118 ctxt->dst.val = fsw; in em_fnstsw()
1123 static void decode_register_operand(struct x86_emulate_ctxt *ctxt, in decode_register_operand() argument
1126 unsigned reg = ctxt->modrm_reg; in decode_register_operand()
1128 if (!(ctxt->d & ModRM)) in decode_register_operand()
1129 reg = (ctxt->b & 7) | ((ctxt->rex_prefix & 1) << 3); in decode_register_operand()
1131 if (ctxt->d & Sse) { in decode_register_operand()
1135 read_sse_reg(ctxt, &op->vec_val, reg); in decode_register_operand()
1138 if (ctxt->d & Mmx) { in decode_register_operand()
1147 op->bytes = (ctxt->d & ByteOp) ? 1 : ctxt->op_bytes; in decode_register_operand()
1148 op->addr.reg = decode_register(ctxt, reg, ctxt->d & ByteOp); in decode_register_operand()
1154 static void adjust_modrm_seg(struct x86_emulate_ctxt *ctxt, int base_reg) in adjust_modrm_seg() argument
1157 ctxt->modrm_seg = VCPU_SREG_SS; in adjust_modrm_seg()
1160 static int decode_modrm(struct x86_emulate_ctxt *ctxt, in decode_modrm() argument
1168 ctxt->modrm_reg = ((ctxt->rex_prefix << 1) & 8); /* REX.R */ in decode_modrm()
1169 index_reg = (ctxt->rex_prefix << 2) & 8; /* REX.X */ in decode_modrm()
1170 base_reg = (ctxt->rex_prefix << 3) & 8; /* REX.B */ in decode_modrm()
1172 ctxt->modrm_mod = (ctxt->modrm & 0xc0) >> 6; in decode_modrm()
1173 ctxt->modrm_reg |= (ctxt->modrm & 0x38) >> 3; in decode_modrm()
1174 ctxt->modrm_rm = base_reg | (ctxt->modrm & 0x07); in decode_modrm()
1175 ctxt->modrm_seg = VCPU_SREG_DS; in decode_modrm()
1177 if (ctxt->modrm_mod == 3 || (ctxt->d & NoMod)) { in decode_modrm()
1179 op->bytes = (ctxt->d & ByteOp) ? 1 : ctxt->op_bytes; in decode_modrm()
1180 op->addr.reg = decode_register(ctxt, ctxt->modrm_rm, in decode_modrm()
1181 ctxt->d & ByteOp); in decode_modrm()
1182 if (ctxt->d & Sse) { in decode_modrm()
1185 op->addr.xmm = ctxt->modrm_rm; in decode_modrm()
1186 read_sse_reg(ctxt, &op->vec_val, ctxt->modrm_rm); in decode_modrm()
1189 if (ctxt->d & Mmx) { in decode_modrm()
1192 op->addr.mm = ctxt->modrm_rm & 7; in decode_modrm()
1201 if (ctxt->ad_bytes == 2) { in decode_modrm()
1202 unsigned bx = reg_read(ctxt, VCPU_REGS_RBX); in decode_modrm()
1203 unsigned bp = reg_read(ctxt, VCPU_REGS_RBP); in decode_modrm()
1204 unsigned si = reg_read(ctxt, VCPU_REGS_RSI); in decode_modrm()
1205 unsigned di = reg_read(ctxt, VCPU_REGS_RDI); in decode_modrm()
1208 switch (ctxt->modrm_mod) { in decode_modrm()
1210 if (ctxt->modrm_rm == 6) in decode_modrm()
1211 modrm_ea += insn_fetch(u16, ctxt); in decode_modrm()
1214 modrm_ea += insn_fetch(s8, ctxt); in decode_modrm()
1217 modrm_ea += insn_fetch(u16, ctxt); in decode_modrm()
1220 switch (ctxt->modrm_rm) { in decode_modrm()
1240 if (ctxt->modrm_mod != 0) in decode_modrm()
1247 if (ctxt->modrm_rm == 2 || ctxt->modrm_rm == 3 || in decode_modrm()
1248 (ctxt->modrm_rm == 6 && ctxt->modrm_mod != 0)) in decode_modrm()
1249 ctxt->modrm_seg = VCPU_SREG_SS; in decode_modrm()
1253 if ((ctxt->modrm_rm & 7) == 4) { in decode_modrm()
1254 sib = insn_fetch(u8, ctxt); in decode_modrm()
1259 if ((base_reg & 7) == 5 && ctxt->modrm_mod == 0) in decode_modrm()
1260 modrm_ea += insn_fetch(s32, ctxt); in decode_modrm()
1262 modrm_ea += reg_read(ctxt, base_reg); in decode_modrm()
1263 adjust_modrm_seg(ctxt, base_reg); in decode_modrm()
1265 if ((ctxt->d & IncSP) && in decode_modrm()
1267 modrm_ea += ctxt->op_bytes; in decode_modrm()
1270 modrm_ea += reg_read(ctxt, index_reg) << scale; in decode_modrm()
1271 } else if ((ctxt->modrm_rm & 7) == 5 && ctxt->modrm_mod == 0) { in decode_modrm()
1272 modrm_ea += insn_fetch(s32, ctxt); in decode_modrm()
1273 if (ctxt->mode == X86EMUL_MODE_PROT64) in decode_modrm()
1274 ctxt->rip_relative = 1; in decode_modrm()
1276 base_reg = ctxt->modrm_rm; in decode_modrm()
1277 modrm_ea += reg_read(ctxt, base_reg); in decode_modrm()
1278 adjust_modrm_seg(ctxt, base_reg); in decode_modrm()
1280 switch (ctxt->modrm_mod) { in decode_modrm()
1282 modrm_ea += insn_fetch(s8, ctxt); in decode_modrm()
1285 modrm_ea += insn_fetch(s32, ctxt); in decode_modrm()
1290 if (ctxt->ad_bytes != 8) in decode_modrm()
1291 ctxt->memop.addr.mem.ea = (u32)ctxt->memop.addr.mem.ea; in decode_modrm()
1297 static int decode_abs(struct x86_emulate_ctxt *ctxt, in decode_abs() argument
1303 switch (ctxt->ad_bytes) { in decode_abs()
1305 op->addr.mem.ea = insn_fetch(u16, ctxt); in decode_abs()
1308 op->addr.mem.ea = insn_fetch(u32, ctxt); in decode_abs()
1311 op->addr.mem.ea = insn_fetch(u64, ctxt); in decode_abs()
1318 static void fetch_bit_operand(struct x86_emulate_ctxt *ctxt) in fetch_bit_operand() argument
1322 if (ctxt->dst.type == OP_MEM && ctxt->src.type == OP_REG) { in fetch_bit_operand()
1323 mask = ~((long)ctxt->dst.bytes * 8 - 1); in fetch_bit_operand()
1325 if (ctxt->src.bytes == 2) in fetch_bit_operand()
1326 sv = (s16)ctxt->src.val & (s16)mask; in fetch_bit_operand()
1327 else if (ctxt->src.bytes == 4) in fetch_bit_operand()
1328 sv = (s32)ctxt->src.val & (s32)mask; in fetch_bit_operand()
1330 sv = (s64)ctxt->src.val & (s64)mask; in fetch_bit_operand()
1332 ctxt->dst.addr.mem.ea = address_mask(ctxt, in fetch_bit_operand()
1333 ctxt->dst.addr.mem.ea + (sv >> 3)); in fetch_bit_operand()
1337 ctxt->src.val &= (ctxt->dst.bytes << 3) - 1; in fetch_bit_operand()
1340 static int read_emulated(struct x86_emulate_ctxt *ctxt, in read_emulated() argument
1344 struct read_cache *mc = &ctxt->mem_read; in read_emulated()
1351 rc = ctxt->ops->read_emulated(ctxt, addr, mc->data + mc->end, size, in read_emulated()
1352 &ctxt->exception); in read_emulated()
1364 static int segmented_read(struct x86_emulate_ctxt *ctxt, in segmented_read() argument
1372 rc = linearize(ctxt, addr, size, false, &linear); in segmented_read()
1375 return read_emulated(ctxt, linear, data, size); in segmented_read()
1378 static int segmented_write(struct x86_emulate_ctxt *ctxt, in segmented_write() argument
1386 rc = linearize(ctxt, addr, size, true, &linear); in segmented_write()
1389 return ctxt->ops->write_emulated(ctxt, linear, data, size, in segmented_write()
1390 &ctxt->exception); in segmented_write()
1393 static int segmented_cmpxchg(struct x86_emulate_ctxt *ctxt, in segmented_cmpxchg() argument
1401 rc = linearize(ctxt, addr, size, true, &linear); in segmented_cmpxchg()
1404 return ctxt->ops->cmpxchg_emulated(ctxt, linear, orig_data, data, in segmented_cmpxchg()
1405 size, &ctxt->exception); in segmented_cmpxchg()
1408 static int pio_in_emulated(struct x86_emulate_ctxt *ctxt, in pio_in_emulated() argument
1412 struct read_cache *rc = &ctxt->io_read; in pio_in_emulated()
1416 unsigned int count = ctxt->rep_prefix ? in pio_in_emulated()
1417 address_mask(ctxt, reg_read(ctxt, VCPU_REGS_RCX)) : 1; in pio_in_emulated()
1418 in_page = (ctxt->eflags & X86_EFLAGS_DF) ? in pio_in_emulated()
1419 offset_in_page(reg_read(ctxt, VCPU_REGS_RDI)) : in pio_in_emulated()
1420 PAGE_SIZE - offset_in_page(reg_read(ctxt, VCPU_REGS_RDI)); in pio_in_emulated()
1425 if (!ctxt->ops->pio_in_emulated(ctxt, size, port, rc->data, n)) in pio_in_emulated()
1430 if (ctxt->rep_prefix && (ctxt->d & String) && in pio_in_emulated()
1431 !(ctxt->eflags & X86_EFLAGS_DF)) { in pio_in_emulated()
1432 ctxt->dst.data = rc->data + rc->pos; in pio_in_emulated()
1433 ctxt->dst.type = OP_MEM_STR; in pio_in_emulated()
1434 ctxt->dst.count = (rc->end - rc->pos) / size; in pio_in_emulated()
1443 static int read_interrupt_descriptor(struct x86_emulate_ctxt *ctxt, in read_interrupt_descriptor() argument
1449 ctxt->ops->get_idt(ctxt, &dt); in read_interrupt_descriptor()
1452 return emulate_gp(ctxt, index << 3 | 0x2); in read_interrupt_descriptor()
1455 return ctxt->ops->read_std(ctxt, addr, desc, sizeof *desc, in read_interrupt_descriptor()
1456 &ctxt->exception); in read_interrupt_descriptor()
1459 static void get_descriptor_table_ptr(struct x86_emulate_ctxt *ctxt, in get_descriptor_table_ptr() argument
1462 const struct x86_emulate_ops *ops = ctxt->ops; in get_descriptor_table_ptr()
1470 if (!ops->get_segment(ctxt, &sel, &desc, &base3, in get_descriptor_table_ptr()
1477 ops->get_gdt(ctxt, dt); in get_descriptor_table_ptr()
1480 static int get_descriptor_ptr(struct x86_emulate_ctxt *ctxt, in get_descriptor_ptr() argument
1487 get_descriptor_table_ptr(ctxt, selector, &dt); in get_descriptor_ptr()
1490 return emulate_gp(ctxt, selector & 0xfffc); in get_descriptor_ptr()
1498 ctxt->ops->get_msr(ctxt, MSR_EFER, &efer); in get_descriptor_ptr()
1509 static int read_segment_descriptor(struct x86_emulate_ctxt *ctxt, in read_segment_descriptor() argument
1515 rc = get_descriptor_ptr(ctxt, selector, desc_addr_p); in read_segment_descriptor()
1519 return ctxt->ops->read_std(ctxt, *desc_addr_p, desc, sizeof(*desc), in read_segment_descriptor()
1520 &ctxt->exception); in read_segment_descriptor()
1524 static int write_segment_descriptor(struct x86_emulate_ctxt *ctxt, in write_segment_descriptor() argument
1530 rc = get_descriptor_ptr(ctxt, selector, &addr); in write_segment_descriptor()
1534 return ctxt->ops->write_std(ctxt, addr, desc, sizeof *desc, in write_segment_descriptor()
1535 &ctxt->exception); in write_segment_descriptor()
1539 static int __load_segment_descriptor(struct x86_emulate_ctxt *ctxt, in __load_segment_descriptor() argument
1556 if (ctxt->mode == X86EMUL_MODE_REAL) { in __load_segment_descriptor()
1559 ctxt->ops->get_segment(ctxt, &dummy, &seg_desc, NULL, seg); in __load_segment_descriptor()
1562 } else if (seg <= VCPU_SREG_GS && ctxt->mode == X86EMUL_MODE_VM86) { in __load_segment_descriptor()
1578 && (ctxt->mode != X86EMUL_MODE_PROT64 || rpl != cpl)) in __load_segment_descriptor()
1590 ret = read_segment_descriptor(ctxt, selector, &seg_desc, &desc_addr); in __load_segment_descriptor()
1638 ctxt->ops->get_msr(ctxt, MSR_EFER, &efer); in __load_segment_descriptor()
1651 ret = ctxt->ops->cmpxchg_emulated(ctxt, desc_addr, &old_desc, &seg_desc, in __load_segment_descriptor()
1652 sizeof(seg_desc), &ctxt->exception); in __load_segment_descriptor()
1677 ret = write_segment_descriptor(ctxt, selector, in __load_segment_descriptor()
1682 } else if (ctxt->mode == X86EMUL_MODE_PROT64) { in __load_segment_descriptor()
1683 ret = ctxt->ops->read_std(ctxt, desc_addr+8, &base3, in __load_segment_descriptor()
1684 sizeof(base3), &ctxt->exception); in __load_segment_descriptor()
1689 return emulate_gp(ctxt, 0); in __load_segment_descriptor()
1692 ctxt->ops->set_segment(ctxt, selector, &seg_desc, base3, seg); in __load_segment_descriptor()
1697 return emulate_exception(ctxt, err_vec, err_code, true); in __load_segment_descriptor()
1700 static int load_segment_descriptor(struct x86_emulate_ctxt *ctxt, in load_segment_descriptor() argument
1703 u8 cpl = ctxt->ops->cpl(ctxt); in load_segment_descriptor()
1704 return __load_segment_descriptor(ctxt, selector, seg, cpl, in load_segment_descriptor()
1713 static int writeback(struct x86_emulate_ctxt *ctxt, struct operand *op) in writeback() argument
1720 if (ctxt->lock_prefix) in writeback()
1721 return segmented_cmpxchg(ctxt, in writeback()
1727 return segmented_write(ctxt, in writeback()
1733 return segmented_write(ctxt, in writeback()
1739 write_sse_reg(ctxt, &op->vec_val, op->addr.xmm); in writeback()
1742 write_mmx_reg(ctxt, &op->mm_val, op->addr.mm); in writeback()
1753 static int push(struct x86_emulate_ctxt *ctxt, void *data, int bytes) in push() argument
1757 rsp_increment(ctxt, -bytes); in push()
1758 addr.ea = reg_read(ctxt, VCPU_REGS_RSP) & stack_mask(ctxt); in push()
1761 return segmented_write(ctxt, addr, data, bytes); in push()
1764 static int em_push(struct x86_emulate_ctxt *ctxt) in em_push() argument
1767 ctxt->dst.type = OP_NONE; in em_push()
1768 return push(ctxt, &ctxt->src.val, ctxt->op_bytes); in em_push()
1771 static int emulate_pop(struct x86_emulate_ctxt *ctxt, in emulate_pop() argument
1777 addr.ea = reg_read(ctxt, VCPU_REGS_RSP) & stack_mask(ctxt); in emulate_pop()
1779 rc = segmented_read(ctxt, addr, dest, len); in emulate_pop()
1783 rsp_increment(ctxt, len); in emulate_pop()
1787 static int em_pop(struct x86_emulate_ctxt *ctxt) in em_pop() argument
1789 return emulate_pop(ctxt, &ctxt->dst.val, ctxt->op_bytes); in em_pop()
1792 static int emulate_popf(struct x86_emulate_ctxt *ctxt, in emulate_popf() argument
1797 int iopl = (ctxt->eflags & X86_EFLAGS_IOPL) >> X86_EFLAGS_IOPL_BIT; in emulate_popf()
1798 int cpl = ctxt->ops->cpl(ctxt); in emulate_popf()
1800 rc = emulate_pop(ctxt, &val, len); in emulate_popf()
1809 switch(ctxt->mode) { in emulate_popf()
1820 return emulate_gp(ctxt, 0); in emulate_popf()
1829 (ctxt->eflags & ~change_mask) | (val & change_mask); in emulate_popf()
1834 static int em_popf(struct x86_emulate_ctxt *ctxt) in em_popf() argument
1836 ctxt->dst.type = OP_REG; in em_popf()
1837 ctxt->dst.addr.reg = &ctxt->eflags; in em_popf()
1838 ctxt->dst.bytes = ctxt->op_bytes; in em_popf()
1839 return emulate_popf(ctxt, &ctxt->dst.val, ctxt->op_bytes); in em_popf()
1842 static int em_enter(struct x86_emulate_ctxt *ctxt) in em_enter() argument
1845 unsigned frame_size = ctxt->src.val; in em_enter()
1846 unsigned nesting_level = ctxt->src2.val & 31; in em_enter()
1852 rbp = reg_read(ctxt, VCPU_REGS_RBP); in em_enter()
1853 rc = push(ctxt, &rbp, stack_size(ctxt)); in em_enter()
1856 assign_masked(reg_rmw(ctxt, VCPU_REGS_RBP), reg_read(ctxt, VCPU_REGS_RSP), in em_enter()
1857 stack_mask(ctxt)); in em_enter()
1858 assign_masked(reg_rmw(ctxt, VCPU_REGS_RSP), in em_enter()
1859 reg_read(ctxt, VCPU_REGS_RSP) - frame_size, in em_enter()
1860 stack_mask(ctxt)); in em_enter()
1864 static int em_leave(struct x86_emulate_ctxt *ctxt) in em_leave() argument
1866 assign_masked(reg_rmw(ctxt, VCPU_REGS_RSP), reg_read(ctxt, VCPU_REGS_RBP), in em_leave()
1867 stack_mask(ctxt)); in em_leave()
1868 return emulate_pop(ctxt, reg_rmw(ctxt, VCPU_REGS_RBP), ctxt->op_bytes); in em_leave()
1871 static int em_push_sreg(struct x86_emulate_ctxt *ctxt) in em_push_sreg() argument
1873 int seg = ctxt->src2.val; in em_push_sreg()
1875 ctxt->src.val = get_segment_selector(ctxt, seg); in em_push_sreg()
1876 if (ctxt->op_bytes == 4) { in em_push_sreg()
1877 rsp_increment(ctxt, -2); in em_push_sreg()
1878 ctxt->op_bytes = 2; in em_push_sreg()
1881 return em_push(ctxt); in em_push_sreg()
1884 static int em_pop_sreg(struct x86_emulate_ctxt *ctxt) in em_pop_sreg() argument
1886 int seg = ctxt->src2.val; in em_pop_sreg()
1890 rc = emulate_pop(ctxt, &selector, 2); in em_pop_sreg()
1894 if (ctxt->modrm_reg == VCPU_SREG_SS) in em_pop_sreg()
1895 ctxt->interruptibility = KVM_X86_SHADOW_INT_MOV_SS; in em_pop_sreg()
1896 if (ctxt->op_bytes > 2) in em_pop_sreg()
1897 rsp_increment(ctxt, ctxt->op_bytes - 2); in em_pop_sreg()
1899 rc = load_segment_descriptor(ctxt, (u16)selector, seg); in em_pop_sreg()
1903 static int em_pusha(struct x86_emulate_ctxt *ctxt) in em_pusha() argument
1905 unsigned long old_esp = reg_read(ctxt, VCPU_REGS_RSP); in em_pusha()
1911 (ctxt->src.val = old_esp) : (ctxt->src.val = reg_read(ctxt, reg)); in em_pusha()
1913 rc = em_push(ctxt); in em_pusha()
1923 static int em_pushf(struct x86_emulate_ctxt *ctxt) in em_pushf() argument
1925 ctxt->src.val = (unsigned long)ctxt->eflags & ~X86_EFLAGS_VM; in em_pushf()
1926 return em_push(ctxt); in em_pushf()
1929 static int em_popa(struct x86_emulate_ctxt *ctxt) in em_popa() argument
1937 rsp_increment(ctxt, ctxt->op_bytes); in em_popa()
1941 rc = emulate_pop(ctxt, &val, ctxt->op_bytes); in em_popa()
1944 assign_register(reg_rmw(ctxt, reg), val, ctxt->op_bytes); in em_popa()
1950 static int __emulate_int_real(struct x86_emulate_ctxt *ctxt, int irq) in __emulate_int_real() argument
1952 const struct x86_emulate_ops *ops = ctxt->ops; in __emulate_int_real()
1960 ctxt->src.val = ctxt->eflags; in __emulate_int_real()
1961 rc = em_push(ctxt); in __emulate_int_real()
1965 ctxt->eflags &= ~(X86_EFLAGS_IF | X86_EFLAGS_TF | X86_EFLAGS_AC); in __emulate_int_real()
1967 ctxt->src.val = get_segment_selector(ctxt, VCPU_SREG_CS); in __emulate_int_real()
1968 rc = em_push(ctxt); in __emulate_int_real()
1972 ctxt->src.val = ctxt->_eip; in __emulate_int_real()
1973 rc = em_push(ctxt); in __emulate_int_real()
1977 ops->get_idt(ctxt, &dt); in __emulate_int_real()
1982 rc = ops->read_std(ctxt, cs_addr, &cs, 2, &ctxt->exception); in __emulate_int_real()
1986 rc = ops->read_std(ctxt, eip_addr, &eip, 2, &ctxt->exception); in __emulate_int_real()
1990 rc = load_segment_descriptor(ctxt, cs, VCPU_SREG_CS); in __emulate_int_real()
1994 ctxt->_eip = eip; in __emulate_int_real()
1999 int emulate_int_real(struct x86_emulate_ctxt *ctxt, int irq) in emulate_int_real() argument
2003 invalidate_registers(ctxt); in emulate_int_real()
2004 rc = __emulate_int_real(ctxt, irq); in emulate_int_real()
2006 writeback_registers(ctxt); in emulate_int_real()
2010 static int emulate_int(struct x86_emulate_ctxt *ctxt, int irq) in emulate_int() argument
2012 switch(ctxt->mode) { in emulate_int()
2014 return __emulate_int_real(ctxt, irq); in emulate_int()
2025 static int emulate_iret_real(struct x86_emulate_ctxt *ctxt) in emulate_iret_real() argument
2042 rc = emulate_pop(ctxt, &temp_eip, ctxt->op_bytes); in emulate_iret_real()
2048 return emulate_gp(ctxt, 0); in emulate_iret_real()
2050 rc = emulate_pop(ctxt, &cs, ctxt->op_bytes); in emulate_iret_real()
2055 rc = emulate_pop(ctxt, &temp_eflags, ctxt->op_bytes); in emulate_iret_real()
2060 rc = load_segment_descriptor(ctxt, (u16)cs, VCPU_SREG_CS); in emulate_iret_real()
2065 ctxt->_eip = temp_eip; in emulate_iret_real()
2067 if (ctxt->op_bytes == 4) in emulate_iret_real()
2068 ctxt->eflags = ((temp_eflags & mask) | (ctxt->eflags & vm86_mask)); in emulate_iret_real()
2069 else if (ctxt->op_bytes == 2) { in emulate_iret_real()
2070 ctxt->eflags &= ~0xffff; in emulate_iret_real()
2071 ctxt->eflags |= temp_eflags; in emulate_iret_real()
2074 ctxt->eflags &= ~EFLG_RESERVED_ZEROS_MASK; /* Clear reserved zeros */ in emulate_iret_real()
2075 ctxt->eflags |= X86_EFLAGS_FIXED; in emulate_iret_real()
2076 ctxt->ops->set_nmi_mask(ctxt, false); in emulate_iret_real()
2081 static int em_iret(struct x86_emulate_ctxt *ctxt) in em_iret() argument
2083 switch(ctxt->mode) { in em_iret()
2085 return emulate_iret_real(ctxt); in em_iret()
2096 static int em_jmp_far(struct x86_emulate_ctxt *ctxt) in em_jmp_far() argument
2101 const struct x86_emulate_ops *ops = ctxt->ops; in em_jmp_far()
2102 u8 cpl = ctxt->ops->cpl(ctxt); in em_jmp_far()
2105 if (ctxt->mode == X86EMUL_MODE_PROT64) in em_jmp_far()
2106 ops->get_segment(ctxt, &old_sel, &old_desc, NULL, in em_jmp_far()
2109 memcpy(&sel, ctxt->src.valptr + ctxt->op_bytes, 2); in em_jmp_far()
2111 rc = __load_segment_descriptor(ctxt, sel, VCPU_SREG_CS, cpl, in em_jmp_far()
2117 rc = assign_eip_far(ctxt, ctxt->src.val, &new_desc); in em_jmp_far()
2119 WARN_ON(ctxt->mode != X86EMUL_MODE_PROT64); in em_jmp_far()
2121 ops->set_segment(ctxt, old_sel, &old_desc, 0, VCPU_SREG_CS); in em_jmp_far()
2127 static int em_jmp_abs(struct x86_emulate_ctxt *ctxt) in em_jmp_abs() argument
2129 return assign_eip_near(ctxt, ctxt->src.val); in em_jmp_abs()
2132 static int em_call_near_abs(struct x86_emulate_ctxt *ctxt) in em_call_near_abs() argument
2137 old_eip = ctxt->_eip; in em_call_near_abs()
2138 rc = assign_eip_near(ctxt, ctxt->src.val); in em_call_near_abs()
2141 ctxt->src.val = old_eip; in em_call_near_abs()
2142 rc = em_push(ctxt); in em_call_near_abs()
2146 static int em_cmpxchg8b(struct x86_emulate_ctxt *ctxt) in em_cmpxchg8b() argument
2148 u64 old = ctxt->dst.orig_val64; in em_cmpxchg8b()
2150 if (ctxt->dst.bytes == 16) in em_cmpxchg8b()
2153 if (((u32) (old >> 0) != (u32) reg_read(ctxt, VCPU_REGS_RAX)) || in em_cmpxchg8b()
2154 ((u32) (old >> 32) != (u32) reg_read(ctxt, VCPU_REGS_RDX))) { in em_cmpxchg8b()
2155 *reg_write(ctxt, VCPU_REGS_RAX) = (u32) (old >> 0); in em_cmpxchg8b()
2156 *reg_write(ctxt, VCPU_REGS_RDX) = (u32) (old >> 32); in em_cmpxchg8b()
2157 ctxt->eflags &= ~X86_EFLAGS_ZF; in em_cmpxchg8b()
2159 ctxt->dst.val64 = ((u64)reg_read(ctxt, VCPU_REGS_RCX) << 32) | in em_cmpxchg8b()
2160 (u32) reg_read(ctxt, VCPU_REGS_RBX); in em_cmpxchg8b()
2162 ctxt->eflags |= X86_EFLAGS_ZF; in em_cmpxchg8b()
2167 static int em_ret(struct x86_emulate_ctxt *ctxt) in em_ret() argument
2172 rc = emulate_pop(ctxt, &eip, ctxt->op_bytes); in em_ret()
2176 return assign_eip_near(ctxt, eip); in em_ret()
2179 static int em_ret_far(struct x86_emulate_ctxt *ctxt) in em_ret_far() argument
2184 int cpl = ctxt->ops->cpl(ctxt); in em_ret_far()
2186 const struct x86_emulate_ops *ops = ctxt->ops; in em_ret_far()
2188 if (ctxt->mode == X86EMUL_MODE_PROT64) in em_ret_far()
2189 ops->get_segment(ctxt, &old_cs, &old_desc, NULL, in em_ret_far()
2192 rc = emulate_pop(ctxt, &eip, ctxt->op_bytes); in em_ret_far()
2195 rc = emulate_pop(ctxt, &cs, ctxt->op_bytes); in em_ret_far()
2199 if (ctxt->mode >= X86EMUL_MODE_PROT16 && (cs & 3) > cpl) in em_ret_far()
2201 rc = __load_segment_descriptor(ctxt, (u16)cs, VCPU_SREG_CS, cpl, in em_ret_far()
2206 rc = assign_eip_far(ctxt, eip, &new_desc); in em_ret_far()
2208 WARN_ON(ctxt->mode != X86EMUL_MODE_PROT64); in em_ret_far()
2209 ops->set_segment(ctxt, old_cs, &old_desc, 0, VCPU_SREG_CS); in em_ret_far()
2214 static int em_ret_far_imm(struct x86_emulate_ctxt *ctxt) in em_ret_far_imm() argument
2218 rc = em_ret_far(ctxt); in em_ret_far_imm()
2221 rsp_increment(ctxt, ctxt->src.val); in em_ret_far_imm()
2225 static int em_cmpxchg(struct x86_emulate_ctxt *ctxt) in em_cmpxchg() argument
2228 ctxt->dst.orig_val = ctxt->dst.val; in em_cmpxchg()
2229 ctxt->dst.val = reg_read(ctxt, VCPU_REGS_RAX); in em_cmpxchg()
2230 ctxt->src.orig_val = ctxt->src.val; in em_cmpxchg()
2231 ctxt->src.val = ctxt->dst.orig_val; in em_cmpxchg()
2232 fastop(ctxt, em_cmp); in em_cmpxchg()
2234 if (ctxt->eflags & X86_EFLAGS_ZF) { in em_cmpxchg()
2236 ctxt->src.type = OP_NONE; in em_cmpxchg()
2237 ctxt->dst.val = ctxt->src.orig_val; in em_cmpxchg()
2240 ctxt->src.type = OP_REG; in em_cmpxchg()
2241 ctxt->src.addr.reg = reg_rmw(ctxt, VCPU_REGS_RAX); in em_cmpxchg()
2242 ctxt->src.val = ctxt->dst.orig_val; in em_cmpxchg()
2244 ctxt->dst.val = ctxt->dst.orig_val; in em_cmpxchg()
2249 static int em_lseg(struct x86_emulate_ctxt *ctxt) in em_lseg() argument
2251 int seg = ctxt->src2.val; in em_lseg()
2255 memcpy(&sel, ctxt->src.valptr + ctxt->op_bytes, 2); in em_lseg()
2257 rc = load_segment_descriptor(ctxt, sel, seg); in em_lseg()
2261 ctxt->dst.val = ctxt->src.val; in em_lseg()
2266 setup_syscalls_segments(struct x86_emulate_ctxt *ctxt, in setup_syscalls_segments() argument
2292 static bool vendor_intel(struct x86_emulate_ctxt *ctxt) in vendor_intel() argument
2297 ctxt->ops->get_cpuid(ctxt, &eax, &ebx, &ecx, &edx); in vendor_intel()
2303 static bool em_syscall_is_enabled(struct x86_emulate_ctxt *ctxt) in em_syscall_is_enabled() argument
2305 const struct x86_emulate_ops *ops = ctxt->ops; in em_syscall_is_enabled()
2312 if (ctxt->mode == X86EMUL_MODE_PROT64) in em_syscall_is_enabled()
2317 ops->get_cpuid(ctxt, &eax, &ebx, &ecx, &edx); in em_syscall_is_enabled()
2347 static int em_syscall(struct x86_emulate_ctxt *ctxt) in em_syscall() argument
2349 const struct x86_emulate_ops *ops = ctxt->ops; in em_syscall()
2356 if (ctxt->mode == X86EMUL_MODE_REAL || in em_syscall()
2357 ctxt->mode == X86EMUL_MODE_VM86) in em_syscall()
2358 return emulate_ud(ctxt); in em_syscall()
2360 if (!(em_syscall_is_enabled(ctxt))) in em_syscall()
2361 return emulate_ud(ctxt); in em_syscall()
2363 ops->get_msr(ctxt, MSR_EFER, &efer); in em_syscall()
2364 setup_syscalls_segments(ctxt, &cs, &ss); in em_syscall()
2367 return emulate_ud(ctxt); in em_syscall()
2369 ops->get_msr(ctxt, MSR_STAR, &msr_data); in em_syscall()
2378 ops->set_segment(ctxt, cs_sel, &cs, 0, VCPU_SREG_CS); in em_syscall()
2379 ops->set_segment(ctxt, ss_sel, &ss, 0, VCPU_SREG_SS); in em_syscall()
2381 *reg_write(ctxt, VCPU_REGS_RCX) = ctxt->_eip; in em_syscall()
2384 *reg_write(ctxt, VCPU_REGS_R11) = ctxt->eflags; in em_syscall()
2386 ops->get_msr(ctxt, in em_syscall()
2387 ctxt->mode == X86EMUL_MODE_PROT64 ? in em_syscall()
2389 ctxt->_eip = msr_data; in em_syscall()
2391 ops->get_msr(ctxt, MSR_SYSCALL_MASK, &msr_data); in em_syscall()
2392 ctxt->eflags &= ~msr_data; in em_syscall()
2393 ctxt->eflags |= X86_EFLAGS_FIXED; in em_syscall()
2397 ops->get_msr(ctxt, MSR_STAR, &msr_data); in em_syscall()
2398 ctxt->_eip = (u32)msr_data; in em_syscall()
2400 ctxt->eflags &= ~(X86_EFLAGS_VM | X86_EFLAGS_IF); in em_syscall()
2406 static int em_sysenter(struct x86_emulate_ctxt *ctxt) in em_sysenter() argument
2408 const struct x86_emulate_ops *ops = ctxt->ops; in em_sysenter()
2414 ops->get_msr(ctxt, MSR_EFER, &efer); in em_sysenter()
2416 if (ctxt->mode == X86EMUL_MODE_REAL) in em_sysenter()
2417 return emulate_gp(ctxt, 0); in em_sysenter()
2423 if ((ctxt->mode != X86EMUL_MODE_PROT64) && (efer & EFER_LMA) in em_sysenter()
2424 && !vendor_intel(ctxt)) in em_sysenter()
2425 return emulate_ud(ctxt); in em_sysenter()
2428 if (ctxt->mode == X86EMUL_MODE_PROT64) in em_sysenter()
2431 setup_syscalls_segments(ctxt, &cs, &ss); in em_sysenter()
2433 ops->get_msr(ctxt, MSR_IA32_SYSENTER_CS, &msr_data); in em_sysenter()
2435 return emulate_gp(ctxt, 0); in em_sysenter()
2437 ctxt->eflags &= ~(X86_EFLAGS_VM | X86_EFLAGS_IF); in em_sysenter()
2445 ops->set_segment(ctxt, cs_sel, &cs, 0, VCPU_SREG_CS); in em_sysenter()
2446 ops->set_segment(ctxt, ss_sel, &ss, 0, VCPU_SREG_SS); in em_sysenter()
2448 ops->get_msr(ctxt, MSR_IA32_SYSENTER_EIP, &msr_data); in em_sysenter()
2449 ctxt->_eip = (efer & EFER_LMA) ? msr_data : (u32)msr_data; in em_sysenter()
2451 ops->get_msr(ctxt, MSR_IA32_SYSENTER_ESP, &msr_data); in em_sysenter()
2452 *reg_write(ctxt, VCPU_REGS_RSP) = (efer & EFER_LMA) ? msr_data : in em_sysenter()
2458 static int em_sysexit(struct x86_emulate_ctxt *ctxt) in em_sysexit() argument
2460 const struct x86_emulate_ops *ops = ctxt->ops; in em_sysexit()
2467 if (ctxt->mode == X86EMUL_MODE_REAL || in em_sysexit()
2468 ctxt->mode == X86EMUL_MODE_VM86) in em_sysexit()
2469 return emulate_gp(ctxt, 0); in em_sysexit()
2471 setup_syscalls_segments(ctxt, &cs, &ss); in em_sysexit()
2473 if ((ctxt->rex_prefix & 0x8) != 0x0) in em_sysexit()
2478 rcx = reg_read(ctxt, VCPU_REGS_RCX); in em_sysexit()
2479 rdx = reg_read(ctxt, VCPU_REGS_RDX); in em_sysexit()
2483 ops->get_msr(ctxt, MSR_IA32_SYSENTER_CS, &msr_data); in em_sysexit()
2488 return emulate_gp(ctxt, 0); in em_sysexit()
2496 return emulate_gp(ctxt, 0); in em_sysexit()
2502 return emulate_gp(ctxt, 0); in em_sysexit()
2508 ops->set_segment(ctxt, cs_sel, &cs, 0, VCPU_SREG_CS); in em_sysexit()
2509 ops->set_segment(ctxt, ss_sel, &ss, 0, VCPU_SREG_SS); in em_sysexit()
2511 ctxt->_eip = rdx; in em_sysexit()
2512 *reg_write(ctxt, VCPU_REGS_RSP) = rcx; in em_sysexit()
2517 static bool emulator_bad_iopl(struct x86_emulate_ctxt *ctxt) in emulator_bad_iopl() argument
2520 if (ctxt->mode == X86EMUL_MODE_REAL) in emulator_bad_iopl()
2522 if (ctxt->mode == X86EMUL_MODE_VM86) in emulator_bad_iopl()
2524 iopl = (ctxt->eflags & X86_EFLAGS_IOPL) >> X86_EFLAGS_IOPL_BIT; in emulator_bad_iopl()
2525 return ctxt->ops->cpl(ctxt) > iopl; in emulator_bad_iopl()
2528 static bool emulator_io_port_access_allowed(struct x86_emulate_ctxt *ctxt, in emulator_io_port_access_allowed() argument
2531 const struct x86_emulate_ops *ops = ctxt->ops; in emulator_io_port_access_allowed()
2539 ops->get_segment(ctxt, &tr, &tr_seg, &base3, VCPU_SREG_TR); in emulator_io_port_access_allowed()
2548 r = ops->read_std(ctxt, base + 102, &io_bitmap_ptr, 2, NULL); in emulator_io_port_access_allowed()
2553 r = ops->read_std(ctxt, base + io_bitmap_ptr + port/8, &perm, 2, NULL); in emulator_io_port_access_allowed()
2561 static bool emulator_io_permited(struct x86_emulate_ctxt *ctxt, in emulator_io_permited() argument
2564 if (ctxt->perm_ok) in emulator_io_permited()
2567 if (emulator_bad_iopl(ctxt)) in emulator_io_permited()
2568 if (!emulator_io_port_access_allowed(ctxt, port, len)) in emulator_io_permited()
2571 ctxt->perm_ok = true; in emulator_io_permited()
2576 static void save_state_to_tss16(struct x86_emulate_ctxt *ctxt, in save_state_to_tss16() argument
2579 tss->ip = ctxt->_eip; in save_state_to_tss16()
2580 tss->flag = ctxt->eflags; in save_state_to_tss16()
2581 tss->ax = reg_read(ctxt, VCPU_REGS_RAX); in save_state_to_tss16()
2582 tss->cx = reg_read(ctxt, VCPU_REGS_RCX); in save_state_to_tss16()
2583 tss->dx = reg_read(ctxt, VCPU_REGS_RDX); in save_state_to_tss16()
2584 tss->bx = reg_read(ctxt, VCPU_REGS_RBX); in save_state_to_tss16()
2585 tss->sp = reg_read(ctxt, VCPU_REGS_RSP); in save_state_to_tss16()
2586 tss->bp = reg_read(ctxt, VCPU_REGS_RBP); in save_state_to_tss16()
2587 tss->si = reg_read(ctxt, VCPU_REGS_RSI); in save_state_to_tss16()
2588 tss->di = reg_read(ctxt, VCPU_REGS_RDI); in save_state_to_tss16()
2590 tss->es = get_segment_selector(ctxt, VCPU_SREG_ES); in save_state_to_tss16()
2591 tss->cs = get_segment_selector(ctxt, VCPU_SREG_CS); in save_state_to_tss16()
2592 tss->ss = get_segment_selector(ctxt, VCPU_SREG_SS); in save_state_to_tss16()
2593 tss->ds = get_segment_selector(ctxt, VCPU_SREG_DS); in save_state_to_tss16()
2594 tss->ldt = get_segment_selector(ctxt, VCPU_SREG_LDTR); in save_state_to_tss16()
2597 static int load_state_from_tss16(struct x86_emulate_ctxt *ctxt, in load_state_from_tss16() argument
2603 ctxt->_eip = tss->ip; in load_state_from_tss16()
2604 ctxt->eflags = tss->flag | 2; in load_state_from_tss16()
2605 *reg_write(ctxt, VCPU_REGS_RAX) = tss->ax; in load_state_from_tss16()
2606 *reg_write(ctxt, VCPU_REGS_RCX) = tss->cx; in load_state_from_tss16()
2607 *reg_write(ctxt, VCPU_REGS_RDX) = tss->dx; in load_state_from_tss16()
2608 *reg_write(ctxt, VCPU_REGS_RBX) = tss->bx; in load_state_from_tss16()
2609 *reg_write(ctxt, VCPU_REGS_RSP) = tss->sp; in load_state_from_tss16()
2610 *reg_write(ctxt, VCPU_REGS_RBP) = tss->bp; in load_state_from_tss16()
2611 *reg_write(ctxt, VCPU_REGS_RSI) = tss->si; in load_state_from_tss16()
2612 *reg_write(ctxt, VCPU_REGS_RDI) = tss->di; in load_state_from_tss16()
2618 set_segment_selector(ctxt, tss->ldt, VCPU_SREG_LDTR); in load_state_from_tss16()
2619 set_segment_selector(ctxt, tss->es, VCPU_SREG_ES); in load_state_from_tss16()
2620 set_segment_selector(ctxt, tss->cs, VCPU_SREG_CS); in load_state_from_tss16()
2621 set_segment_selector(ctxt, tss->ss, VCPU_SREG_SS); in load_state_from_tss16()
2622 set_segment_selector(ctxt, tss->ds, VCPU_SREG_DS); in load_state_from_tss16()
2630 ret = __load_segment_descriptor(ctxt, tss->ldt, VCPU_SREG_LDTR, cpl, in load_state_from_tss16()
2634 ret = __load_segment_descriptor(ctxt, tss->es, VCPU_SREG_ES, cpl, in load_state_from_tss16()
2638 ret = __load_segment_descriptor(ctxt, tss->cs, VCPU_SREG_CS, cpl, in load_state_from_tss16()
2642 ret = __load_segment_descriptor(ctxt, tss->ss, VCPU_SREG_SS, cpl, in load_state_from_tss16()
2646 ret = __load_segment_descriptor(ctxt, tss->ds, VCPU_SREG_DS, cpl, in load_state_from_tss16()
2654 static int task_switch_16(struct x86_emulate_ctxt *ctxt, in task_switch_16() argument
2658 const struct x86_emulate_ops *ops = ctxt->ops; in task_switch_16()
2663 ret = ops->read_std(ctxt, old_tss_base, &tss_seg, sizeof tss_seg, in task_switch_16()
2664 &ctxt->exception); in task_switch_16()
2668 save_state_to_tss16(ctxt, &tss_seg); in task_switch_16()
2670 ret = ops->write_std(ctxt, old_tss_base, &tss_seg, sizeof tss_seg, in task_switch_16()
2671 &ctxt->exception); in task_switch_16()
2675 ret = ops->read_std(ctxt, new_tss_base, &tss_seg, sizeof tss_seg, in task_switch_16()
2676 &ctxt->exception); in task_switch_16()
2683 ret = ops->write_std(ctxt, new_tss_base, in task_switch_16()
2686 &ctxt->exception); in task_switch_16()
2691 return load_state_from_tss16(ctxt, &tss_seg); in task_switch_16()
2694 static void save_state_to_tss32(struct x86_emulate_ctxt *ctxt, in save_state_to_tss32() argument
2698 tss->eip = ctxt->_eip; in save_state_to_tss32()
2699 tss->eflags = ctxt->eflags; in save_state_to_tss32()
2700 tss->eax = reg_read(ctxt, VCPU_REGS_RAX); in save_state_to_tss32()
2701 tss->ecx = reg_read(ctxt, VCPU_REGS_RCX); in save_state_to_tss32()
2702 tss->edx = reg_read(ctxt, VCPU_REGS_RDX); in save_state_to_tss32()
2703 tss->ebx = reg_read(ctxt, VCPU_REGS_RBX); in save_state_to_tss32()
2704 tss->esp = reg_read(ctxt, VCPU_REGS_RSP); in save_state_to_tss32()
2705 tss->ebp = reg_read(ctxt, VCPU_REGS_RBP); in save_state_to_tss32()
2706 tss->esi = reg_read(ctxt, VCPU_REGS_RSI); in save_state_to_tss32()
2707 tss->edi = reg_read(ctxt, VCPU_REGS_RDI); in save_state_to_tss32()
2709 tss->es = get_segment_selector(ctxt, VCPU_SREG_ES); in save_state_to_tss32()
2710 tss->cs = get_segment_selector(ctxt, VCPU_SREG_CS); in save_state_to_tss32()
2711 tss->ss = get_segment_selector(ctxt, VCPU_SREG_SS); in save_state_to_tss32()
2712 tss->ds = get_segment_selector(ctxt, VCPU_SREG_DS); in save_state_to_tss32()
2713 tss->fs = get_segment_selector(ctxt, VCPU_SREG_FS); in save_state_to_tss32()
2714 tss->gs = get_segment_selector(ctxt, VCPU_SREG_GS); in save_state_to_tss32()
2717 static int load_state_from_tss32(struct x86_emulate_ctxt *ctxt, in load_state_from_tss32() argument
2723 if (ctxt->ops->set_cr(ctxt, 3, tss->cr3)) in load_state_from_tss32()
2724 return emulate_gp(ctxt, 0); in load_state_from_tss32()
2725 ctxt->_eip = tss->eip; in load_state_from_tss32()
2726 ctxt->eflags = tss->eflags | 2; in load_state_from_tss32()
2729 *reg_write(ctxt, VCPU_REGS_RAX) = tss->eax; in load_state_from_tss32()
2730 *reg_write(ctxt, VCPU_REGS_RCX) = tss->ecx; in load_state_from_tss32()
2731 *reg_write(ctxt, VCPU_REGS_RDX) = tss->edx; in load_state_from_tss32()
2732 *reg_write(ctxt, VCPU_REGS_RBX) = tss->ebx; in load_state_from_tss32()
2733 *reg_write(ctxt, VCPU_REGS_RSP) = tss->esp; in load_state_from_tss32()
2734 *reg_write(ctxt, VCPU_REGS_RBP) = tss->ebp; in load_state_from_tss32()
2735 *reg_write(ctxt, VCPU_REGS_RSI) = tss->esi; in load_state_from_tss32()
2736 *reg_write(ctxt, VCPU_REGS_RDI) = tss->edi; in load_state_from_tss32()
2743 set_segment_selector(ctxt, tss->ldt_selector, VCPU_SREG_LDTR); in load_state_from_tss32()
2744 set_segment_selector(ctxt, tss->es, VCPU_SREG_ES); in load_state_from_tss32()
2745 set_segment_selector(ctxt, tss->cs, VCPU_SREG_CS); in load_state_from_tss32()
2746 set_segment_selector(ctxt, tss->ss, VCPU_SREG_SS); in load_state_from_tss32()
2747 set_segment_selector(ctxt, tss->ds, VCPU_SREG_DS); in load_state_from_tss32()
2748 set_segment_selector(ctxt, tss->fs, VCPU_SREG_FS); in load_state_from_tss32()
2749 set_segment_selector(ctxt, tss->gs, VCPU_SREG_GS); in load_state_from_tss32()
2756 if (ctxt->eflags & X86_EFLAGS_VM) { in load_state_from_tss32()
2757 ctxt->mode = X86EMUL_MODE_VM86; in load_state_from_tss32()
2760 ctxt->mode = X86EMUL_MODE_PROT32; in load_state_from_tss32()
2768 ret = __load_segment_descriptor(ctxt, tss->ldt_selector, VCPU_SREG_LDTR, in load_state_from_tss32()
2772 ret = __load_segment_descriptor(ctxt, tss->es, VCPU_SREG_ES, cpl, in load_state_from_tss32()
2776 ret = __load_segment_descriptor(ctxt, tss->cs, VCPU_SREG_CS, cpl, in load_state_from_tss32()
2780 ret = __load_segment_descriptor(ctxt, tss->ss, VCPU_SREG_SS, cpl, in load_state_from_tss32()
2784 ret = __load_segment_descriptor(ctxt, tss->ds, VCPU_SREG_DS, cpl, in load_state_from_tss32()
2788 ret = __load_segment_descriptor(ctxt, tss->fs, VCPU_SREG_FS, cpl, in load_state_from_tss32()
2792 ret = __load_segment_descriptor(ctxt, tss->gs, VCPU_SREG_GS, cpl, in load_state_from_tss32()
2798 static int task_switch_32(struct x86_emulate_ctxt *ctxt, in task_switch_32() argument
2802 const struct x86_emulate_ops *ops = ctxt->ops; in task_switch_32()
2809 ret = ops->read_std(ctxt, old_tss_base, &tss_seg, sizeof tss_seg, in task_switch_32()
2810 &ctxt->exception); in task_switch_32()
2814 save_state_to_tss32(ctxt, &tss_seg); in task_switch_32()
2817 ret = ops->write_std(ctxt, old_tss_base + eip_offset, &tss_seg.eip, in task_switch_32()
2818 ldt_sel_offset - eip_offset, &ctxt->exception); in task_switch_32()
2822 ret = ops->read_std(ctxt, new_tss_base, &tss_seg, sizeof tss_seg, in task_switch_32()
2823 &ctxt->exception); in task_switch_32()
2830 ret = ops->write_std(ctxt, new_tss_base, in task_switch_32()
2833 &ctxt->exception); in task_switch_32()
2838 return load_state_from_tss32(ctxt, &tss_seg); in task_switch_32()
2841 static int emulator_do_task_switch(struct x86_emulate_ctxt *ctxt, in emulator_do_task_switch() argument
2845 const struct x86_emulate_ops *ops = ctxt->ops; in emulator_do_task_switch()
2848 u16 old_tss_sel = get_segment_selector(ctxt, VCPU_SREG_TR); in emulator_do_task_switch()
2850 ops->get_cached_segment_base(ctxt, VCPU_SREG_TR); in emulator_do_task_switch()
2856 ret = read_segment_descriptor(ctxt, tss_selector, &next_tss_desc, &desc_addr); in emulator_do_task_switch()
2859 ret = read_segment_descriptor(ctxt, old_tss_sel, &curr_tss_desc, &desc_addr); in emulator_do_task_switch()
2879 ret = read_interrupt_descriptor(ctxt, idt_index, in emulator_do_task_switch()
2885 if ((tss_selector & 3) > dpl || ops->cpl(ctxt) > dpl) in emulator_do_task_switch()
2886 return emulate_gp(ctxt, (idt_index << 3) | 0x2); in emulator_do_task_switch()
2894 return emulate_ts(ctxt, tss_selector & 0xfffc); in emulator_do_task_switch()
2899 write_segment_descriptor(ctxt, old_tss_sel, &curr_tss_desc); in emulator_do_task_switch()
2903 ctxt->eflags = ctxt->eflags & ~X86_EFLAGS_NT; in emulator_do_task_switch()
2911 ret = task_switch_32(ctxt, tss_selector, old_tss_sel, in emulator_do_task_switch()
2914 ret = task_switch_16(ctxt, tss_selector, old_tss_sel, in emulator_do_task_switch()
2920 ctxt->eflags = ctxt->eflags | X86_EFLAGS_NT; in emulator_do_task_switch()
2924 write_segment_descriptor(ctxt, tss_selector, &next_tss_desc); in emulator_do_task_switch()
2927 ops->set_cr(ctxt, 0, ops->get_cr(ctxt, 0) | X86_CR0_TS); in emulator_do_task_switch()
2928 ops->set_segment(ctxt, tss_selector, &next_tss_desc, 0, VCPU_SREG_TR); in emulator_do_task_switch()
2931 ctxt->op_bytes = ctxt->ad_bytes = (next_tss_desc.type & 8) ? 4 : 2; in emulator_do_task_switch()
2932 ctxt->lock_prefix = 0; in emulator_do_task_switch()
2933 ctxt->src.val = (unsigned long) error_code; in emulator_do_task_switch()
2934 ret = em_push(ctxt); in emulator_do_task_switch()
2940 int emulator_task_switch(struct x86_emulate_ctxt *ctxt, in emulator_task_switch() argument
2946 invalidate_registers(ctxt); in emulator_task_switch()
2947 ctxt->_eip = ctxt->eip; in emulator_task_switch()
2948 ctxt->dst.type = OP_NONE; in emulator_task_switch()
2950 rc = emulator_do_task_switch(ctxt, tss_selector, idt_index, reason, in emulator_task_switch()
2954 ctxt->eip = ctxt->_eip; in emulator_task_switch()
2955 writeback_registers(ctxt); in emulator_task_switch()
2961 static void string_addr_inc(struct x86_emulate_ctxt *ctxt, int reg, in string_addr_inc() argument
2964 int df = (ctxt->eflags & X86_EFLAGS_DF) ? -op->count : op->count; in string_addr_inc()
2966 register_address_increment(ctxt, reg, df * op->bytes); in string_addr_inc()
2967 op->addr.mem.ea = register_address(ctxt, reg); in string_addr_inc()
2970 static int em_das(struct x86_emulate_ctxt *ctxt) in em_das() argument
2975 cf = ctxt->eflags & X86_EFLAGS_CF; in em_das()
2976 al = ctxt->dst.val; in em_das()
2981 af = ctxt->eflags & X86_EFLAGS_AF; in em_das()
2994 ctxt->dst.val = al; in em_das()
2996 ctxt->src.type = OP_IMM; in em_das()
2997 ctxt->src.val = 0; in em_das()
2998 ctxt->src.bytes = 1; in em_das()
2999 fastop(ctxt, em_or); in em_das()
3000 ctxt->eflags &= ~(X86_EFLAGS_AF | X86_EFLAGS_CF); in em_das()
3002 ctxt->eflags |= X86_EFLAGS_CF; in em_das()
3004 ctxt->eflags |= X86_EFLAGS_AF; in em_das()
3008 static int em_aam(struct x86_emulate_ctxt *ctxt) in em_aam() argument
3012 if (ctxt->src.val == 0) in em_aam()
3013 return emulate_de(ctxt); in em_aam()
3015 al = ctxt->dst.val & 0xff; in em_aam()
3016 ah = al / ctxt->src.val; in em_aam()
3017 al %= ctxt->src.val; in em_aam()
3019 ctxt->dst.val = (ctxt->dst.val & 0xffff0000) | al | (ah << 8); in em_aam()
3022 ctxt->src.type = OP_IMM; in em_aam()
3023 ctxt->src.val = 0; in em_aam()
3024 ctxt->src.bytes = 1; in em_aam()
3025 fastop(ctxt, em_or); in em_aam()
3030 static int em_aad(struct x86_emulate_ctxt *ctxt) in em_aad() argument
3032 u8 al = ctxt->dst.val & 0xff; in em_aad()
3033 u8 ah = (ctxt->dst.val >> 8) & 0xff; in em_aad()
3035 al = (al + (ah * ctxt->src.val)) & 0xff; in em_aad()
3037 ctxt->dst.val = (ctxt->dst.val & 0xffff0000) | al; in em_aad()
3040 ctxt->src.type = OP_IMM; in em_aad()
3041 ctxt->src.val = 0; in em_aad()
3042 ctxt->src.bytes = 1; in em_aad()
3043 fastop(ctxt, em_or); in em_aad()
3048 static int em_call(struct x86_emulate_ctxt *ctxt) in em_call() argument
3051 long rel = ctxt->src.val; in em_call()
3053 ctxt->src.val = (unsigned long)ctxt->_eip; in em_call()
3054 rc = jmp_rel(ctxt, rel); in em_call()
3057 return em_push(ctxt); in em_call()
3060 static int em_call_far(struct x86_emulate_ctxt *ctxt) in em_call_far() argument
3066 const struct x86_emulate_ops *ops = ctxt->ops; in em_call_far()
3067 int cpl = ctxt->ops->cpl(ctxt); in em_call_far()
3068 enum x86emul_mode prev_mode = ctxt->mode; in em_call_far()
3070 old_eip = ctxt->_eip; in em_call_far()
3071 ops->get_segment(ctxt, &old_cs, &old_desc, NULL, VCPU_SREG_CS); in em_call_far()
3073 memcpy(&sel, ctxt->src.valptr + ctxt->op_bytes, 2); in em_call_far()
3074 rc = __load_segment_descriptor(ctxt, sel, VCPU_SREG_CS, cpl, in em_call_far()
3079 rc = assign_eip_far(ctxt, ctxt->src.val, &new_desc); in em_call_far()
3083 ctxt->src.val = old_cs; in em_call_far()
3084 rc = em_push(ctxt); in em_call_far()
3088 ctxt->src.val = old_eip; in em_call_far()
3089 rc = em_push(ctxt); in em_call_far()
3098 ops->set_segment(ctxt, old_cs, &old_desc, 0, VCPU_SREG_CS); in em_call_far()
3099 ctxt->mode = prev_mode; in em_call_far()
3104 static int em_ret_near_imm(struct x86_emulate_ctxt *ctxt) in em_ret_near_imm() argument
3109 rc = emulate_pop(ctxt, &eip, ctxt->op_bytes); in em_ret_near_imm()
3112 rc = assign_eip_near(ctxt, eip); in em_ret_near_imm()
3115 rsp_increment(ctxt, ctxt->src.val); in em_ret_near_imm()
3119 static int em_xchg(struct x86_emulate_ctxt *ctxt) in em_xchg() argument
3122 ctxt->src.val = ctxt->dst.val; in em_xchg()
3123 write_register_operand(&ctxt->src); in em_xchg()
3126 ctxt->dst.val = ctxt->src.orig_val; in em_xchg()
3127 ctxt->lock_prefix = 1; in em_xchg()
3131 static int em_imul_3op(struct x86_emulate_ctxt *ctxt) in em_imul_3op() argument
3133 ctxt->dst.val = ctxt->src2.val; in em_imul_3op()
3134 return fastop(ctxt, em_imul); in em_imul_3op()
3137 static int em_cwd(struct x86_emulate_ctxt *ctxt) in em_cwd() argument
3139 ctxt->dst.type = OP_REG; in em_cwd()
3140 ctxt->dst.bytes = ctxt->src.bytes; in em_cwd()
3141 ctxt->dst.addr.reg = reg_rmw(ctxt, VCPU_REGS_RDX); in em_cwd()
3142 ctxt->dst.val = ~((ctxt->src.val >> (ctxt->src.bytes * 8 - 1)) - 1); in em_cwd()
3147 static int em_rdtsc(struct x86_emulate_ctxt *ctxt) in em_rdtsc() argument
3151 ctxt->ops->get_msr(ctxt, MSR_IA32_TSC, &tsc); in em_rdtsc()
3152 *reg_write(ctxt, VCPU_REGS_RAX) = (u32)tsc; in em_rdtsc()
3153 *reg_write(ctxt, VCPU_REGS_RDX) = tsc >> 32; in em_rdtsc()
3157 static int em_rdpmc(struct x86_emulate_ctxt *ctxt) in em_rdpmc() argument
3161 if (ctxt->ops->read_pmc(ctxt, reg_read(ctxt, VCPU_REGS_RCX), &pmc)) in em_rdpmc()
3162 return emulate_gp(ctxt, 0); in em_rdpmc()
3163 *reg_write(ctxt, VCPU_REGS_RAX) = (u32)pmc; in em_rdpmc()
3164 *reg_write(ctxt, VCPU_REGS_RDX) = pmc >> 32; in em_rdpmc()
3168 static int em_mov(struct x86_emulate_ctxt *ctxt) in em_mov() argument
3170 memcpy(ctxt->dst.valptr, ctxt->src.valptr, sizeof(ctxt->src.valptr)); in em_mov()
3176 static int em_movbe(struct x86_emulate_ctxt *ctxt) in em_movbe() argument
3184 ctxt->ops->get_cpuid(ctxt, &eax, &ebx, &ecx, &edx); in em_movbe()
3186 return emulate_ud(ctxt); in em_movbe()
3188 switch (ctxt->op_bytes) { in em_movbe()
3198 tmp = (u16)ctxt->src.val; in em_movbe()
3199 ctxt->dst.val &= ~0xffffUL; in em_movbe()
3200 ctxt->dst.val |= (unsigned long)swab16(tmp); in em_movbe()
3203 ctxt->dst.val = swab32((u32)ctxt->src.val); in em_movbe()
3206 ctxt->dst.val = swab64(ctxt->src.val); in em_movbe()
3214 static int em_cr_write(struct x86_emulate_ctxt *ctxt) in em_cr_write() argument
3216 if (ctxt->ops->set_cr(ctxt, ctxt->modrm_reg, ctxt->src.val)) in em_cr_write()
3217 return emulate_gp(ctxt, 0); in em_cr_write()
3220 ctxt->dst.type = OP_NONE; in em_cr_write()
3224 static int em_dr_write(struct x86_emulate_ctxt *ctxt) in em_dr_write() argument
3228 if (ctxt->mode == X86EMUL_MODE_PROT64) in em_dr_write()
3229 val = ctxt->src.val & ~0ULL; in em_dr_write()
3231 val = ctxt->src.val & ~0U; in em_dr_write()
3234 if (ctxt->ops->set_dr(ctxt, ctxt->modrm_reg, val) < 0) in em_dr_write()
3235 return emulate_gp(ctxt, 0); in em_dr_write()
3238 ctxt->dst.type = OP_NONE; in em_dr_write()
3242 static int em_wrmsr(struct x86_emulate_ctxt *ctxt) in em_wrmsr() argument
3246 msr_data = (u32)reg_read(ctxt, VCPU_REGS_RAX) in em_wrmsr()
3247 | ((u64)reg_read(ctxt, VCPU_REGS_RDX) << 32); in em_wrmsr()
3248 if (ctxt->ops->set_msr(ctxt, reg_read(ctxt, VCPU_REGS_RCX), msr_data)) in em_wrmsr()
3249 return emulate_gp(ctxt, 0); in em_wrmsr()
3254 static int em_rdmsr(struct x86_emulate_ctxt *ctxt) in em_rdmsr() argument
3258 if (ctxt->ops->get_msr(ctxt, reg_read(ctxt, VCPU_REGS_RCX), &msr_data)) in em_rdmsr()
3259 return emulate_gp(ctxt, 0); in em_rdmsr()
3261 *reg_write(ctxt, VCPU_REGS_RAX) = (u32)msr_data; in em_rdmsr()
3262 *reg_write(ctxt, VCPU_REGS_RDX) = msr_data >> 32; in em_rdmsr()
3266 static int em_mov_rm_sreg(struct x86_emulate_ctxt *ctxt) in em_mov_rm_sreg() argument
3268 if (ctxt->modrm_reg > VCPU_SREG_GS) in em_mov_rm_sreg()
3269 return emulate_ud(ctxt); in em_mov_rm_sreg()
3271 ctxt->dst.val = get_segment_selector(ctxt, ctxt->modrm_reg); in em_mov_rm_sreg()
3272 if (ctxt->dst.bytes == 4 && ctxt->dst.type == OP_MEM) in em_mov_rm_sreg()
3273 ctxt->dst.bytes = 2; in em_mov_rm_sreg()
3277 static int em_mov_sreg_rm(struct x86_emulate_ctxt *ctxt) in em_mov_sreg_rm() argument
3279 u16 sel = ctxt->src.val; in em_mov_sreg_rm()
3281 if (ctxt->modrm_reg == VCPU_SREG_CS || ctxt->modrm_reg > VCPU_SREG_GS) in em_mov_sreg_rm()
3282 return emulate_ud(ctxt); in em_mov_sreg_rm()
3284 if (ctxt->modrm_reg == VCPU_SREG_SS) in em_mov_sreg_rm()
3285 ctxt->interruptibility = KVM_X86_SHADOW_INT_MOV_SS; in em_mov_sreg_rm()
3288 ctxt->dst.type = OP_NONE; in em_mov_sreg_rm()
3289 return load_segment_descriptor(ctxt, sel, ctxt->modrm_reg); in em_mov_sreg_rm()
3292 static int em_lldt(struct x86_emulate_ctxt *ctxt) in em_lldt() argument
3294 u16 sel = ctxt->src.val; in em_lldt()
3297 ctxt->dst.type = OP_NONE; in em_lldt()
3298 return load_segment_descriptor(ctxt, sel, VCPU_SREG_LDTR); in em_lldt()
3301 static int em_ltr(struct x86_emulate_ctxt *ctxt) in em_ltr() argument
3303 u16 sel = ctxt->src.val; in em_ltr()
3306 ctxt->dst.type = OP_NONE; in em_ltr()
3307 return load_segment_descriptor(ctxt, sel, VCPU_SREG_TR); in em_ltr()
3310 static int em_invlpg(struct x86_emulate_ctxt *ctxt) in em_invlpg() argument
3315 rc = linearize(ctxt, ctxt->src.addr.mem, 1, false, &linear); in em_invlpg()
3317 ctxt->ops->invlpg(ctxt, linear); in em_invlpg()
3319 ctxt->dst.type = OP_NONE; in em_invlpg()
3323 static int em_clts(struct x86_emulate_ctxt *ctxt) in em_clts() argument
3327 cr0 = ctxt->ops->get_cr(ctxt, 0); in em_clts()
3329 ctxt->ops->set_cr(ctxt, 0, cr0); in em_clts()
3333 static int em_hypercall(struct x86_emulate_ctxt *ctxt) in em_hypercall() argument
3335 int rc = ctxt->ops->fix_hypercall(ctxt); in em_hypercall()
3341 ctxt->_eip = ctxt->eip; in em_hypercall()
3343 ctxt->dst.type = OP_NONE; in em_hypercall()
3347 static int emulate_store_desc_ptr(struct x86_emulate_ctxt *ctxt, in emulate_store_desc_ptr() argument
3348 void (*get)(struct x86_emulate_ctxt *ctxt, in emulate_store_desc_ptr() argument
3353 if (ctxt->mode == X86EMUL_MODE_PROT64) in emulate_store_desc_ptr()
3354 ctxt->op_bytes = 8; in emulate_store_desc_ptr()
3355 get(ctxt, &desc_ptr); in emulate_store_desc_ptr()
3356 if (ctxt->op_bytes == 2) { in emulate_store_desc_ptr()
3357 ctxt->op_bytes = 4; in emulate_store_desc_ptr()
3361 ctxt->dst.type = OP_NONE; in emulate_store_desc_ptr()
3362 return segmented_write(ctxt, ctxt->dst.addr.mem, in emulate_store_desc_ptr()
3363 &desc_ptr, 2 + ctxt->op_bytes); in emulate_store_desc_ptr()
3366 static int em_sgdt(struct x86_emulate_ctxt *ctxt) in em_sgdt() argument
3368 return emulate_store_desc_ptr(ctxt, ctxt->ops->get_gdt); in em_sgdt()
3371 static int em_sidt(struct x86_emulate_ctxt *ctxt) in em_sidt() argument
3373 return emulate_store_desc_ptr(ctxt, ctxt->ops->get_idt); in em_sidt()
3376 static int em_lgdt_lidt(struct x86_emulate_ctxt *ctxt, bool lgdt) in em_lgdt_lidt() argument
3381 if (ctxt->mode == X86EMUL_MODE_PROT64) in em_lgdt_lidt()
3382 ctxt->op_bytes = 8; in em_lgdt_lidt()
3383 rc = read_descriptor(ctxt, ctxt->src.addr.mem, in em_lgdt_lidt()
3385 ctxt->op_bytes); in em_lgdt_lidt()
3388 if (ctxt->mode == X86EMUL_MODE_PROT64 && in em_lgdt_lidt()
3390 return emulate_gp(ctxt, 0); in em_lgdt_lidt()
3392 ctxt->ops->set_gdt(ctxt, &desc_ptr); in em_lgdt_lidt()
3394 ctxt->ops->set_idt(ctxt, &desc_ptr); in em_lgdt_lidt()
3396 ctxt->dst.type = OP_NONE; in em_lgdt_lidt()
3400 static int em_lgdt(struct x86_emulate_ctxt *ctxt) in em_lgdt() argument
3402 return em_lgdt_lidt(ctxt, true); in em_lgdt()
3405 static int em_lidt(struct x86_emulate_ctxt *ctxt) in em_lidt() argument
3407 return em_lgdt_lidt(ctxt, false); in em_lidt()
3410 static int em_smsw(struct x86_emulate_ctxt *ctxt) in em_smsw() argument
3412 if (ctxt->dst.type == OP_MEM) in em_smsw()
3413 ctxt->dst.bytes = 2; in em_smsw()
3414 ctxt->dst.val = ctxt->ops->get_cr(ctxt, 0); in em_smsw()
3418 static int em_lmsw(struct x86_emulate_ctxt *ctxt) in em_lmsw() argument
3420 ctxt->ops->set_cr(ctxt, 0, (ctxt->ops->get_cr(ctxt, 0) & ~0x0eul) in em_lmsw()
3421 | (ctxt->src.val & 0x0f)); in em_lmsw()
3422 ctxt->dst.type = OP_NONE; in em_lmsw()
3426 static int em_loop(struct x86_emulate_ctxt *ctxt) in em_loop() argument
3430 register_address_increment(ctxt, VCPU_REGS_RCX, -1); in em_loop()
3431 if ((address_mask(ctxt, reg_read(ctxt, VCPU_REGS_RCX)) != 0) && in em_loop()
3432 (ctxt->b == 0xe2 || test_cc(ctxt->b ^ 0x5, ctxt->eflags))) in em_loop()
3433 rc = jmp_rel(ctxt, ctxt->src.val); in em_loop()
3438 static int em_jcxz(struct x86_emulate_ctxt *ctxt) in em_jcxz() argument
3442 if (address_mask(ctxt, reg_read(ctxt, VCPU_REGS_RCX)) == 0) in em_jcxz()
3443 rc = jmp_rel(ctxt, ctxt->src.val); in em_jcxz()
3448 static int em_in(struct x86_emulate_ctxt *ctxt) in em_in() argument
3450 if (!pio_in_emulated(ctxt, ctxt->dst.bytes, ctxt->src.val, in em_in()
3451 &ctxt->dst.val)) in em_in()
3457 static int em_out(struct x86_emulate_ctxt *ctxt) in em_out() argument
3459 ctxt->ops->pio_out_emulated(ctxt, ctxt->src.bytes, ctxt->dst.val, in em_out()
3460 &ctxt->src.val, 1); in em_out()
3462 ctxt->dst.type = OP_NONE; in em_out()
3466 static int em_cli(struct x86_emulate_ctxt *ctxt) in em_cli() argument
3468 if (emulator_bad_iopl(ctxt)) in em_cli()
3469 return emulate_gp(ctxt, 0); in em_cli()
3471 ctxt->eflags &= ~X86_EFLAGS_IF; in em_cli()
3475 static int em_sti(struct x86_emulate_ctxt *ctxt) in em_sti() argument
3477 if (emulator_bad_iopl(ctxt)) in em_sti()
3478 return emulate_gp(ctxt, 0); in em_sti()
3480 ctxt->interruptibility = KVM_X86_SHADOW_INT_STI; in em_sti()
3481 ctxt->eflags |= X86_EFLAGS_IF; in em_sti()
3485 static int em_cpuid(struct x86_emulate_ctxt *ctxt) in em_cpuid() argument
3489 eax = reg_read(ctxt, VCPU_REGS_RAX); in em_cpuid()
3490 ecx = reg_read(ctxt, VCPU_REGS_RCX); in em_cpuid()
3491 ctxt->ops->get_cpuid(ctxt, &eax, &ebx, &ecx, &edx); in em_cpuid()
3492 *reg_write(ctxt, VCPU_REGS_RAX) = eax; in em_cpuid()
3493 *reg_write(ctxt, VCPU_REGS_RBX) = ebx; in em_cpuid()
3494 *reg_write(ctxt, VCPU_REGS_RCX) = ecx; in em_cpuid()
3495 *reg_write(ctxt, VCPU_REGS_RDX) = edx; in em_cpuid()
3499 static int em_sahf(struct x86_emulate_ctxt *ctxt) in em_sahf() argument
3505 flags &= *reg_rmw(ctxt, VCPU_REGS_RAX) >> 8; in em_sahf()
3507 ctxt->eflags &= ~0xffUL; in em_sahf()
3508 ctxt->eflags |= flags | X86_EFLAGS_FIXED; in em_sahf()
3512 static int em_lahf(struct x86_emulate_ctxt *ctxt) in em_lahf() argument
3514 *reg_rmw(ctxt, VCPU_REGS_RAX) &= ~0xff00UL; in em_lahf()
3515 *reg_rmw(ctxt, VCPU_REGS_RAX) |= (ctxt->eflags & 0xff) << 8; in em_lahf()
3519 static int em_bswap(struct x86_emulate_ctxt *ctxt) in em_bswap() argument
3521 switch (ctxt->op_bytes) { in em_bswap()
3524 asm("bswap %0" : "+r"(ctxt->dst.val)); in em_bswap()
3528 asm("bswap %0" : "+r"(*(u32 *)&ctxt->dst.val)); in em_bswap()
3534 static int em_clflush(struct x86_emulate_ctxt *ctxt) in em_clflush() argument
3540 static int em_movsxd(struct x86_emulate_ctxt *ctxt) in em_movsxd() argument
3542 ctxt->dst.val = (s32) ctxt->src.val; in em_movsxd()
3558 static int check_cr_read(struct x86_emulate_ctxt *ctxt) in check_cr_read() argument
3560 if (!valid_cr(ctxt->modrm_reg)) in check_cr_read()
3561 return emulate_ud(ctxt); in check_cr_read()
3566 static int check_cr_write(struct x86_emulate_ctxt *ctxt) in check_cr_write() argument
3568 u64 new_val = ctxt->src.val64; in check_cr_write()
3569 int cr = ctxt->modrm_reg; in check_cr_write()
3581 return emulate_ud(ctxt); in check_cr_write()
3584 return emulate_gp(ctxt, 0); in check_cr_write()
3591 return emulate_gp(ctxt, 0); in check_cr_write()
3593 cr4 = ctxt->ops->get_cr(ctxt, 4); in check_cr_write()
3594 ctxt->ops->get_msr(ctxt, MSR_EFER, &efer); in check_cr_write()
3598 return emulate_gp(ctxt, 0); in check_cr_write()
3605 ctxt->ops->get_msr(ctxt, MSR_EFER, &efer); in check_cr_write()
3610 return emulate_gp(ctxt, 0); in check_cr_write()
3615 ctxt->ops->get_msr(ctxt, MSR_EFER, &efer); in check_cr_write()
3618 return emulate_gp(ctxt, 0); in check_cr_write()
3627 static int check_dr7_gd(struct x86_emulate_ctxt *ctxt) in check_dr7_gd() argument
3631 ctxt->ops->get_dr(ctxt, 7, &dr7); in check_dr7_gd()
3637 static int check_dr_read(struct x86_emulate_ctxt *ctxt) in check_dr_read() argument
3639 int dr = ctxt->modrm_reg; in check_dr_read()
3643 return emulate_ud(ctxt); in check_dr_read()
3645 cr4 = ctxt->ops->get_cr(ctxt, 4); in check_dr_read()
3647 return emulate_ud(ctxt); in check_dr_read()
3649 if (check_dr7_gd(ctxt)) { in check_dr_read()
3652 ctxt->ops->get_dr(ctxt, 6, &dr6); in check_dr_read()
3655 ctxt->ops->set_dr(ctxt, 6, dr6); in check_dr_read()
3656 return emulate_db(ctxt); in check_dr_read()
3662 static int check_dr_write(struct x86_emulate_ctxt *ctxt) in check_dr_write() argument
3664 u64 new_val = ctxt->src.val64; in check_dr_write()
3665 int dr = ctxt->modrm_reg; in check_dr_write()
3668 return emulate_gp(ctxt, 0); in check_dr_write()
3670 return check_dr_read(ctxt); in check_dr_write()
3673 static int check_svme(struct x86_emulate_ctxt *ctxt) in check_svme() argument
3677 ctxt->ops->get_msr(ctxt, MSR_EFER, &efer); in check_svme()
3680 return emulate_ud(ctxt); in check_svme()
3685 static int check_svme_pa(struct x86_emulate_ctxt *ctxt) in check_svme_pa() argument
3687 u64 rax = reg_read(ctxt, VCPU_REGS_RAX); in check_svme_pa()
3691 return emulate_gp(ctxt, 0); in check_svme_pa()
3693 return check_svme(ctxt); in check_svme_pa()
3696 static int check_rdtsc(struct x86_emulate_ctxt *ctxt) in check_rdtsc() argument
3698 u64 cr4 = ctxt->ops->get_cr(ctxt, 4); in check_rdtsc()
3700 if (cr4 & X86_CR4_TSD && ctxt->ops->cpl(ctxt)) in check_rdtsc()
3701 return emulate_ud(ctxt); in check_rdtsc()
3706 static int check_rdpmc(struct x86_emulate_ctxt *ctxt) in check_rdpmc() argument
3708 u64 cr4 = ctxt->ops->get_cr(ctxt, 4); in check_rdpmc()
3709 u64 rcx = reg_read(ctxt, VCPU_REGS_RCX); in check_rdpmc()
3711 if ((!(cr4 & X86_CR4_PCE) && ctxt->ops->cpl(ctxt)) || in check_rdpmc()
3712 ctxt->ops->check_pmc(ctxt, rcx)) in check_rdpmc()
3713 return emulate_gp(ctxt, 0); in check_rdpmc()
3718 static int check_perm_in(struct x86_emulate_ctxt *ctxt) in check_perm_in() argument
3720 ctxt->dst.bytes = min(ctxt->dst.bytes, 4u); in check_perm_in()
3721 if (!emulator_io_permited(ctxt, ctxt->src.val, ctxt->dst.bytes)) in check_perm_in()
3722 return emulate_gp(ctxt, 0); in check_perm_in()
3727 static int check_perm_out(struct x86_emulate_ctxt *ctxt) in check_perm_out() argument
3729 ctxt->src.bytes = min(ctxt->src.bytes, 4u); in check_perm_out()
3730 if (!emulator_io_permited(ctxt, ctxt->dst.val, ctxt->src.bytes)) in check_perm_out()
3731 return emulate_gp(ctxt, 0); in check_perm_out()
4258 static unsigned imm_size(struct x86_emulate_ctxt *ctxt) in imm_size() argument
4262 size = (ctxt->d & ByteOp) ? 1 : ctxt->op_bytes; in imm_size()
4268 static int decode_imm(struct x86_emulate_ctxt *ctxt, struct operand *op, in decode_imm() argument
4275 op->addr.mem.ea = ctxt->_eip; in decode_imm()
4279 op->val = insn_fetch(s8, ctxt); in decode_imm()
4282 op->val = insn_fetch(s16, ctxt); in decode_imm()
4285 op->val = insn_fetch(s32, ctxt); in decode_imm()
4288 op->val = insn_fetch(s64, ctxt); in decode_imm()
4308 static int decode_operand(struct x86_emulate_ctxt *ctxt, struct operand *op, in decode_operand() argument
4315 decode_register_operand(ctxt, op); in decode_operand()
4318 rc = decode_imm(ctxt, op, 1, false); in decode_operand()
4321 ctxt->memop.bytes = (ctxt->d & ByteOp) ? 1 : ctxt->op_bytes; in decode_operand()
4323 *op = ctxt->memop; in decode_operand()
4324 ctxt->memopp = op; in decode_operand()
4325 if (ctxt->d & BitOp) in decode_operand()
4326 fetch_bit_operand(ctxt); in decode_operand()
4330 ctxt->memop.bytes = (ctxt->op_bytes == 8) ? 16 : 8; in decode_operand()
4334 op->bytes = (ctxt->d & ByteOp) ? 1 : ctxt->op_bytes; in decode_operand()
4335 op->addr.reg = reg_rmw(ctxt, VCPU_REGS_RAX); in decode_operand()
4341 op->bytes = (ctxt->d & ByteOp) ? 2 : ctxt->op_bytes; in decode_operand()
4342 op->addr.reg = reg_rmw(ctxt, VCPU_REGS_RAX); in decode_operand()
4347 if (ctxt->d & ByteOp) { in decode_operand()
4352 op->bytes = ctxt->op_bytes; in decode_operand()
4353 op->addr.reg = reg_rmw(ctxt, VCPU_REGS_RDX); in decode_operand()
4359 op->bytes = (ctxt->d & ByteOp) ? 1 : ctxt->op_bytes; in decode_operand()
4361 register_address(ctxt, VCPU_REGS_RDI); in decode_operand()
4369 op->addr.reg = reg_rmw(ctxt, VCPU_REGS_RDX); in decode_operand()
4375 op->val = reg_read(ctxt, VCPU_REGS_RCX) & 0xff; in decode_operand()
4378 rc = decode_imm(ctxt, op, 1, true); in decode_operand()
4386 rc = decode_imm(ctxt, op, imm_size(ctxt), true); in decode_operand()
4389 rc = decode_imm(ctxt, op, ctxt->op_bytes, true); in decode_operand()
4392 ctxt->memop.bytes = 1; in decode_operand()
4393 if (ctxt->memop.type == OP_REG) { in decode_operand()
4394 ctxt->memop.addr.reg = decode_register(ctxt, in decode_operand()
4395 ctxt->modrm_rm, true); in decode_operand()
4396 fetch_register_operand(&ctxt->memop); in decode_operand()
4400 ctxt->memop.bytes = 2; in decode_operand()
4403 ctxt->memop.bytes = 4; in decode_operand()
4406 rc = decode_imm(ctxt, op, 2, false); in decode_operand()
4409 rc = decode_imm(ctxt, op, imm_size(ctxt), false); in decode_operand()
4413 op->bytes = (ctxt->d & ByteOp) ? 1 : ctxt->op_bytes; in decode_operand()
4415 register_address(ctxt, VCPU_REGS_RSI); in decode_operand()
4416 op->addr.mem.seg = ctxt->seg_override; in decode_operand()
4422 op->bytes = (ctxt->d & ByteOp) ? 1 : ctxt->op_bytes; in decode_operand()
4424 address_mask(ctxt, in decode_operand()
4425 reg_read(ctxt, VCPU_REGS_RBX) + in decode_operand()
4426 (reg_read(ctxt, VCPU_REGS_RAX) & 0xff)); in decode_operand()
4427 op->addr.mem.seg = ctxt->seg_override; in decode_operand()
4432 op->addr.mem.ea = ctxt->_eip; in decode_operand()
4433 op->bytes = ctxt->op_bytes + 2; in decode_operand()
4434 insn_fetch_arr(op->valptr, op->bytes, ctxt); in decode_operand()
4437 ctxt->memop.bytes = ctxt->op_bytes + 2; in decode_operand()
4474 int x86_decode_insn(struct x86_emulate_ctxt *ctxt, void *insn, int insn_len) in x86_decode_insn() argument
4477 int mode = ctxt->mode; in x86_decode_insn()
4483 ctxt->memop.type = OP_NONE; in x86_decode_insn()
4484 ctxt->memopp = NULL; in x86_decode_insn()
4485 ctxt->_eip = ctxt->eip; in x86_decode_insn()
4486 ctxt->fetch.ptr = ctxt->fetch.data; in x86_decode_insn()
4487 ctxt->fetch.end = ctxt->fetch.data + insn_len; in x86_decode_insn()
4488 ctxt->opcode_len = 1; in x86_decode_insn()
4490 memcpy(ctxt->fetch.data, insn, insn_len); in x86_decode_insn()
4492 rc = __do_insn_fetch_bytes(ctxt, 1); in x86_decode_insn()
4516 ctxt->op_bytes = def_op_bytes; in x86_decode_insn()
4517 ctxt->ad_bytes = def_ad_bytes; in x86_decode_insn()
4521 switch (ctxt->b = insn_fetch(u8, ctxt)) { in x86_decode_insn()
4525 ctxt->op_bytes = def_op_bytes ^ 6; in x86_decode_insn()
4530 ctxt->ad_bytes = def_ad_bytes ^ 12; in x86_decode_insn()
4533 ctxt->ad_bytes = def_ad_bytes ^ 6; in x86_decode_insn()
4540 ctxt->seg_override = (ctxt->b >> 3) & 3; in x86_decode_insn()
4545 ctxt->seg_override = ctxt->b & 7; in x86_decode_insn()
4550 ctxt->rex_prefix = ctxt->b; in x86_decode_insn()
4553 ctxt->lock_prefix = 1; in x86_decode_insn()
4557 ctxt->rep_prefix = ctxt->b; in x86_decode_insn()
4565 ctxt->rex_prefix = 0; in x86_decode_insn()
4571 if (ctxt->rex_prefix & 8) in x86_decode_insn()
4572 ctxt->op_bytes = 8; /* REX.W */ in x86_decode_insn()
4575 opcode = opcode_table[ctxt->b]; in x86_decode_insn()
4577 if (ctxt->b == 0x0f) { in x86_decode_insn()
4578 ctxt->opcode_len = 2; in x86_decode_insn()
4579 ctxt->b = insn_fetch(u8, ctxt); in x86_decode_insn()
4580 opcode = twobyte_table[ctxt->b]; in x86_decode_insn()
4583 if (ctxt->b == 0x38) { in x86_decode_insn()
4584 ctxt->opcode_len = 3; in x86_decode_insn()
4585 ctxt->b = insn_fetch(u8, ctxt); in x86_decode_insn()
4586 opcode = opcode_map_0f_38[ctxt->b]; in x86_decode_insn()
4589 ctxt->d = opcode.flags; in x86_decode_insn()
4591 if (ctxt->d & ModRM) in x86_decode_insn()
4592 ctxt->modrm = insn_fetch(u8, ctxt); in x86_decode_insn()
4595 if (ctxt->opcode_len == 1 && (ctxt->b == 0xc5 || ctxt->b == 0xc4) && in x86_decode_insn()
4596 (mode == X86EMUL_MODE_PROT64 || (ctxt->modrm & 0xc0) == 0xc0)) { in x86_decode_insn()
4597 ctxt->d = NotImpl; in x86_decode_insn()
4600 while (ctxt->d & GroupMask) { in x86_decode_insn()
4601 switch (ctxt->d & GroupMask) { in x86_decode_insn()
4603 goffset = (ctxt->modrm >> 3) & 7; in x86_decode_insn()
4607 goffset = (ctxt->modrm >> 3) & 7; in x86_decode_insn()
4608 if ((ctxt->modrm >> 6) == 3) in x86_decode_insn()
4614 goffset = ctxt->modrm & 7; in x86_decode_insn()
4618 if (ctxt->rep_prefix && op_prefix) in x86_decode_insn()
4620 simd_prefix = op_prefix ? 0x66 : ctxt->rep_prefix; in x86_decode_insn()
4629 if (ctxt->modrm > 0xbf) in x86_decode_insn()
4630 opcode = opcode.u.esc->high[ctxt->modrm - 0xc0]; in x86_decode_insn()
4632 opcode = opcode.u.esc->op[(ctxt->modrm >> 3) & 7]; in x86_decode_insn()
4635 if ((ctxt->modrm >> 6) == 3) in x86_decode_insn()
4641 if (ctxt->mode == X86EMUL_MODE_PROT64) in x86_decode_insn()
4650 ctxt->d &= ~(u64)GroupMask; in x86_decode_insn()
4651 ctxt->d |= opcode.flags; in x86_decode_insn()
4655 if (ctxt->d == 0) in x86_decode_insn()
4658 ctxt->execute = opcode.u.execute; in x86_decode_insn()
4660 if (unlikely(ctxt->ud) && likely(!(ctxt->d & EmulateOnUD))) in x86_decode_insn()
4663 if (unlikely(ctxt->d & in x86_decode_insn()
4670 ctxt->check_perm = opcode.check_perm; in x86_decode_insn()
4671 ctxt->intercept = opcode.intercept; in x86_decode_insn()
4673 if (ctxt->d & NotImpl) in x86_decode_insn()
4677 if (ctxt->op_bytes == 4 && (ctxt->d & Stack)) in x86_decode_insn()
4678 ctxt->op_bytes = 8; in x86_decode_insn()
4679 else if (ctxt->d & NearBranch) in x86_decode_insn()
4680 ctxt->op_bytes = 8; in x86_decode_insn()
4683 if (ctxt->d & Op3264) { in x86_decode_insn()
4685 ctxt->op_bytes = 8; in x86_decode_insn()
4687 ctxt->op_bytes = 4; in x86_decode_insn()
4690 if ((ctxt->d & No16) && ctxt->op_bytes == 2) in x86_decode_insn()
4691 ctxt->op_bytes = 4; in x86_decode_insn()
4693 if (ctxt->d & Sse) in x86_decode_insn()
4694 ctxt->op_bytes = 16; in x86_decode_insn()
4695 else if (ctxt->d & Mmx) in x86_decode_insn()
4696 ctxt->op_bytes = 8; in x86_decode_insn()
4700 if (ctxt->d & ModRM) { in x86_decode_insn()
4701 rc = decode_modrm(ctxt, &ctxt->memop); in x86_decode_insn()
4704 ctxt->seg_override = ctxt->modrm_seg; in x86_decode_insn()
4706 } else if (ctxt->d & MemAbs) in x86_decode_insn()
4707 rc = decode_abs(ctxt, &ctxt->memop); in x86_decode_insn()
4712 ctxt->seg_override = VCPU_SREG_DS; in x86_decode_insn()
4714 ctxt->memop.addr.mem.seg = ctxt->seg_override; in x86_decode_insn()
4720 rc = decode_operand(ctxt, &ctxt->src, (ctxt->d >> SrcShift) & OpMask); in x86_decode_insn()
4728 rc = decode_operand(ctxt, &ctxt->src2, (ctxt->d >> Src2Shift) & OpMask); in x86_decode_insn()
4733 rc = decode_operand(ctxt, &ctxt->dst, (ctxt->d >> DstShift) & OpMask); in x86_decode_insn()
4735 if (ctxt->rip_relative) in x86_decode_insn()
4736 ctxt->memopp->addr.mem.ea = address_mask(ctxt, in x86_decode_insn()
4737 ctxt->memopp->addr.mem.ea + ctxt->_eip); in x86_decode_insn()
4743 bool x86_page_table_writing_insn(struct x86_emulate_ctxt *ctxt) in x86_page_table_writing_insn() argument
4745 return ctxt->d & PageTable; in x86_page_table_writing_insn()
4748 static bool string_insn_completed(struct x86_emulate_ctxt *ctxt) in string_insn_completed() argument
4757 if (((ctxt->b == 0xa6) || (ctxt->b == 0xa7) || in string_insn_completed()
4758 (ctxt->b == 0xae) || (ctxt->b == 0xaf)) in string_insn_completed()
4759 && (((ctxt->rep_prefix == REPE_PREFIX) && in string_insn_completed()
4760 ((ctxt->eflags & X86_EFLAGS_ZF) == 0)) in string_insn_completed()
4761 || ((ctxt->rep_prefix == REPNE_PREFIX) && in string_insn_completed()
4762 ((ctxt->eflags & X86_EFLAGS_ZF) == X86_EFLAGS_ZF)))) in string_insn_completed()
4768 static int flush_pending_x87_faults(struct x86_emulate_ctxt *ctxt) in flush_pending_x87_faults() argument
4772 ctxt->ops->get_fpu(ctxt); in flush_pending_x87_faults()
4782 ctxt->ops->put_fpu(ctxt); in flush_pending_x87_faults()
4785 return emulate_exception(ctxt, MF_VECTOR, 0, false); in flush_pending_x87_faults()
4790 static void fetch_possible_mmx_operand(struct x86_emulate_ctxt *ctxt, in fetch_possible_mmx_operand() argument
4794 read_mmx_reg(ctxt, &op->mm_val, op->addr.mm); in fetch_possible_mmx_operand()
4797 static int fastop(struct x86_emulate_ctxt *ctxt, void (*fop)(struct fastop *)) in fastop() argument
4799 ulong flags = (ctxt->eflags & EFLAGS_MASK) | X86_EFLAGS_IF; in fastop()
4800 if (!(ctxt->d & ByteOp)) in fastop()
4801 fop += __ffs(ctxt->dst.bytes) * FASTOP_SIZE; in fastop()
4803 : "+a"(ctxt->dst.val), "+d"(ctxt->src.val), [flags]"+D"(flags), in fastop()
4805 : "c"(ctxt->src2.val)); in fastop()
4806 ctxt->eflags = (ctxt->eflags & ~EFLAGS_MASK) | (flags & EFLAGS_MASK); in fastop()
4808 return emulate_de(ctxt); in fastop()
4812 void init_decode_cache(struct x86_emulate_ctxt *ctxt) in init_decode_cache() argument
4814 memset(&ctxt->rip_relative, 0, in init_decode_cache()
4815 (void *)&ctxt->modrm - (void *)&ctxt->rip_relative); in init_decode_cache()
4817 ctxt->io_read.pos = 0; in init_decode_cache()
4818 ctxt->io_read.end = 0; in init_decode_cache()
4819 ctxt->mem_read.end = 0; in init_decode_cache()
4822 int x86_emulate_insn(struct x86_emulate_ctxt *ctxt) in x86_emulate_insn() argument
4824 const struct x86_emulate_ops *ops = ctxt->ops; in x86_emulate_insn()
4826 int saved_dst_type = ctxt->dst.type; in x86_emulate_insn()
4828 ctxt->mem_read.pos = 0; in x86_emulate_insn()
4831 if (ctxt->lock_prefix && (!(ctxt->d & Lock) || ctxt->dst.type != OP_MEM)) { in x86_emulate_insn()
4832 rc = emulate_ud(ctxt); in x86_emulate_insn()
4836 if ((ctxt->d & SrcMask) == SrcMemFAddr && ctxt->src.type != OP_MEM) { in x86_emulate_insn()
4837 rc = emulate_ud(ctxt); in x86_emulate_insn()
4841 if (unlikely(ctxt->d & in x86_emulate_insn()
4843 if ((ctxt->mode == X86EMUL_MODE_PROT64 && (ctxt->d & No64)) || in x86_emulate_insn()
4844 (ctxt->d & Undefined)) { in x86_emulate_insn()
4845 rc = emulate_ud(ctxt); in x86_emulate_insn()
4849 if (((ctxt->d & (Sse|Mmx)) && ((ops->get_cr(ctxt, 0) & X86_CR0_EM))) in x86_emulate_insn()
4850 || ((ctxt->d & Sse) && !(ops->get_cr(ctxt, 4) & X86_CR4_OSFXSR))) { in x86_emulate_insn()
4851 rc = emulate_ud(ctxt); in x86_emulate_insn()
4855 if ((ctxt->d & (Sse|Mmx)) && (ops->get_cr(ctxt, 0) & X86_CR0_TS)) { in x86_emulate_insn()
4856 rc = emulate_nm(ctxt); in x86_emulate_insn()
4860 if (ctxt->d & Mmx) { in x86_emulate_insn()
4861 rc = flush_pending_x87_faults(ctxt); in x86_emulate_insn()
4868 fetch_possible_mmx_operand(ctxt, &ctxt->src); in x86_emulate_insn()
4869 fetch_possible_mmx_operand(ctxt, &ctxt->src2); in x86_emulate_insn()
4870 if (!(ctxt->d & Mov)) in x86_emulate_insn()
4871 fetch_possible_mmx_operand(ctxt, &ctxt->dst); in x86_emulate_insn()
4874 if (unlikely(ctxt->guest_mode) && (ctxt->d & Intercept)) { in x86_emulate_insn()
4875 rc = emulator_check_intercept(ctxt, ctxt->intercept, in x86_emulate_insn()
4882 if ((ctxt->d & Prot) && ctxt->mode < X86EMUL_MODE_PROT16) { in x86_emulate_insn()
4883 rc = emulate_ud(ctxt); in x86_emulate_insn()
4888 if ((ctxt->d & Priv) && ops->cpl(ctxt)) { in x86_emulate_insn()
4889 if (ctxt->d & PrivUD) in x86_emulate_insn()
4890 rc = emulate_ud(ctxt); in x86_emulate_insn()
4892 rc = emulate_gp(ctxt, 0); in x86_emulate_insn()
4897 if (ctxt->d & CheckPerm) { in x86_emulate_insn()
4898 rc = ctxt->check_perm(ctxt); in x86_emulate_insn()
4903 if (unlikely(ctxt->guest_mode) && (ctxt->d & Intercept)) { in x86_emulate_insn()
4904 rc = emulator_check_intercept(ctxt, ctxt->intercept, in x86_emulate_insn()
4910 if (ctxt->rep_prefix && (ctxt->d & String)) { in x86_emulate_insn()
4912 if (address_mask(ctxt, reg_read(ctxt, VCPU_REGS_RCX)) == 0) { in x86_emulate_insn()
4913 ctxt->eip = ctxt->_eip; in x86_emulate_insn()
4914 ctxt->eflags &= ~X86_EFLAGS_RF; in x86_emulate_insn()
4920 if ((ctxt->src.type == OP_MEM) && !(ctxt->d & NoAccess)) { in x86_emulate_insn()
4921 rc = segmented_read(ctxt, ctxt->src.addr.mem, in x86_emulate_insn()
4922 ctxt->src.valptr, ctxt->src.bytes); in x86_emulate_insn()
4925 ctxt->src.orig_val64 = ctxt->src.val64; in x86_emulate_insn()
4928 if (ctxt->src2.type == OP_MEM) { in x86_emulate_insn()
4929 rc = segmented_read(ctxt, ctxt->src2.addr.mem, in x86_emulate_insn()
4930 &ctxt->src2.val, ctxt->src2.bytes); in x86_emulate_insn()
4935 if ((ctxt->d & DstMask) == ImplicitOps) in x86_emulate_insn()
4939 if ((ctxt->dst.type == OP_MEM) && !(ctxt->d & Mov)) { in x86_emulate_insn()
4941 rc = segmented_read(ctxt, ctxt->dst.addr.mem, in x86_emulate_insn()
4942 &ctxt->dst.val, ctxt->dst.bytes); in x86_emulate_insn()
4944 if (!(ctxt->d & NoWrite) && in x86_emulate_insn()
4946 ctxt->exception.vector == PF_VECTOR) in x86_emulate_insn()
4947 ctxt->exception.error_code |= PFERR_WRITE_MASK; in x86_emulate_insn()
4952 ctxt->dst.orig_val64 = ctxt->dst.val64; in x86_emulate_insn()
4956 if (unlikely(ctxt->guest_mode) && (ctxt->d & Intercept)) { in x86_emulate_insn()
4957 rc = emulator_check_intercept(ctxt, ctxt->intercept, in x86_emulate_insn()
4963 if (ctxt->rep_prefix && (ctxt->d & String)) in x86_emulate_insn()
4964 ctxt->eflags |= X86_EFLAGS_RF; in x86_emulate_insn()
4966 ctxt->eflags &= ~X86_EFLAGS_RF; in x86_emulate_insn()
4968 if (ctxt->execute) { in x86_emulate_insn()
4969 if (ctxt->d & Fastop) { in x86_emulate_insn()
4970 void (*fop)(struct fastop *) = (void *)ctxt->execute; in x86_emulate_insn()
4971 rc = fastop(ctxt, fop); in x86_emulate_insn()
4976 rc = ctxt->execute(ctxt); in x86_emulate_insn()
4982 if (ctxt->opcode_len == 2) in x86_emulate_insn()
4984 else if (ctxt->opcode_len == 3) in x86_emulate_insn()
4987 switch (ctxt->b) { in x86_emulate_insn()
4989 if (test_cc(ctxt->b, ctxt->eflags)) in x86_emulate_insn()
4990 rc = jmp_rel(ctxt, ctxt->src.val); in x86_emulate_insn()
4993 ctxt->dst.val = ctxt->src.addr.mem.ea; in x86_emulate_insn()
4996 if (ctxt->dst.addr.reg == reg_rmw(ctxt, VCPU_REGS_RAX)) in x86_emulate_insn()
4997 ctxt->dst.type = OP_NONE; in x86_emulate_insn()
4999 rc = em_xchg(ctxt); in x86_emulate_insn()
5002 switch (ctxt->op_bytes) { in x86_emulate_insn()
5003 case 2: ctxt->dst.val = (s8)ctxt->dst.val; break; in x86_emulate_insn()
5004 case 4: ctxt->dst.val = (s16)ctxt->dst.val; break; in x86_emulate_insn()
5005 case 8: ctxt->dst.val = (s32)ctxt->dst.val; break; in x86_emulate_insn()
5009 rc = emulate_int(ctxt, 3); in x86_emulate_insn()
5012 rc = emulate_int(ctxt, ctxt->src.val); in x86_emulate_insn()
5015 if (ctxt->eflags & X86_EFLAGS_OF) in x86_emulate_insn()
5016 rc = emulate_int(ctxt, 4); in x86_emulate_insn()
5020 rc = jmp_rel(ctxt, ctxt->src.val); in x86_emulate_insn()
5021 ctxt->dst.type = OP_NONE; /* Disable writeback. */ in x86_emulate_insn()
5024 ctxt->ops->halt(ctxt); in x86_emulate_insn()
5028 ctxt->eflags ^= X86_EFLAGS_CF; in x86_emulate_insn()
5031 ctxt->eflags &= ~X86_EFLAGS_CF; in x86_emulate_insn()
5034 ctxt->eflags |= X86_EFLAGS_CF; in x86_emulate_insn()
5037 ctxt->eflags &= ~X86_EFLAGS_DF; in x86_emulate_insn()
5040 ctxt->eflags |= X86_EFLAGS_DF; in x86_emulate_insn()
5050 if (ctxt->d & SrcWrite) { in x86_emulate_insn()
5051 BUG_ON(ctxt->src.type == OP_MEM || ctxt->src.type == OP_MEM_STR); in x86_emulate_insn()
5052 rc = writeback(ctxt, &ctxt->src); in x86_emulate_insn()
5056 if (!(ctxt->d & NoWrite)) { in x86_emulate_insn()
5057 rc = writeback(ctxt, &ctxt->dst); in x86_emulate_insn()
5066 ctxt->dst.type = saved_dst_type; in x86_emulate_insn()
5068 if ((ctxt->d & SrcMask) == SrcSI) in x86_emulate_insn()
5069 string_addr_inc(ctxt, VCPU_REGS_RSI, &ctxt->src); in x86_emulate_insn()
5071 if ((ctxt->d & DstMask) == DstDI) in x86_emulate_insn()
5072 string_addr_inc(ctxt, VCPU_REGS_RDI, &ctxt->dst); in x86_emulate_insn()
5074 if (ctxt->rep_prefix && (ctxt->d & String)) { in x86_emulate_insn()
5076 struct read_cache *r = &ctxt->io_read; in x86_emulate_insn()
5077 if ((ctxt->d & SrcMask) == SrcSI) in x86_emulate_insn()
5078 count = ctxt->src.count; in x86_emulate_insn()
5080 count = ctxt->dst.count; in x86_emulate_insn()
5081 register_address_increment(ctxt, VCPU_REGS_RCX, -count); in x86_emulate_insn()
5083 if (!string_insn_completed(ctxt)) { in x86_emulate_insn()
5088 if ((r->end != 0 || reg_read(ctxt, VCPU_REGS_RCX) & 0x3ff) && in x86_emulate_insn()
5095 ctxt->mem_read.end = 0; in x86_emulate_insn()
5096 writeback_registers(ctxt); in x86_emulate_insn()
5101 ctxt->eflags &= ~X86_EFLAGS_RF; in x86_emulate_insn()
5104 ctxt->eip = ctxt->_eip; in x86_emulate_insn()
5108 WARN_ON(ctxt->exception.vector > 0x1f); in x86_emulate_insn()
5109 ctxt->have_exception = true; in x86_emulate_insn()
5115 writeback_registers(ctxt); in x86_emulate_insn()
5120 switch (ctxt->b) { in x86_emulate_insn()
5122 (ctxt->ops->wbinvd)(ctxt); in x86_emulate_insn()
5130 ctxt->dst.val = ops->get_cr(ctxt, ctxt->modrm_reg); in x86_emulate_insn()
5133 ops->get_dr(ctxt, ctxt->modrm_reg, &ctxt->dst.val); in x86_emulate_insn()
5136 if (test_cc(ctxt->b, ctxt->eflags)) in x86_emulate_insn()
5137 ctxt->dst.val = ctxt->src.val; in x86_emulate_insn()
5138 else if (ctxt->op_bytes != 4) in x86_emulate_insn()
5139 ctxt->dst.type = OP_NONE; /* no writeback */ in x86_emulate_insn()
5142 if (test_cc(ctxt->b, ctxt->eflags)) in x86_emulate_insn()
5143 rc = jmp_rel(ctxt, ctxt->src.val); in x86_emulate_insn()
5146 ctxt->dst.val = test_cc(ctxt->b, ctxt->eflags); in x86_emulate_insn()
5149 ctxt->dst.bytes = ctxt->op_bytes; in x86_emulate_insn()
5150 ctxt->dst.val = (ctxt->src.bytes == 1) ? (u8) ctxt->src.val in x86_emulate_insn()
5151 : (u16) ctxt->src.val; in x86_emulate_insn()
5154 ctxt->dst.bytes = ctxt->op_bytes; in x86_emulate_insn()
5155 ctxt->dst.val = (ctxt->src.bytes == 1) ? (s8) ctxt->src.val : in x86_emulate_insn()
5156 (s16) ctxt->src.val; in x86_emulate_insn()
5173 void emulator_invalidate_register_cache(struct x86_emulate_ctxt *ctxt) in emulator_invalidate_register_cache() argument
5175 invalidate_registers(ctxt); in emulator_invalidate_register_cache()
5178 void emulator_writeback_register_cache(struct x86_emulate_ctxt *ctxt) in emulator_writeback_register_cache() argument
5180 writeback_registers(ctxt); in emulator_writeback_register_cache()