#define DstDI (5<<1) /* Destination is in ES:(E)DI */
#define DstMem64 (6<<1) /* 64bit memory operand */
#define DstImmUByte (7<<1) /* 8-bit unsigned immediate operand */
-#define DstMask (7<<1)
+#define DstDX (8<<1) /* Destination is in DX register */
+#define DstMask (0xf<<1)
/* Source operand type. */
-#define SrcNone (0<<4) /* No source operand. */
-#define SrcReg (1<<4) /* Register operand. */
-#define SrcMem (2<<4) /* Memory operand. */
-#define SrcMem16 (3<<4) /* Memory operand (16-bit). */
-#define SrcMem32 (4<<4) /* Memory operand (32-bit). */
-#define SrcImm (5<<4) /* Immediate operand. */
-#define SrcImmByte (6<<4) /* 8-bit sign-extended immediate operand. */
-#define SrcOne (7<<4) /* Implied '1' */
-#define SrcImmUByte (8<<4) /* 8-bit unsigned immediate operand. */
-#define SrcImmU (9<<4) /* Immediate operand, unsigned */
-#define SrcSI (0xa<<4) /* Source is in the DS:RSI */
-#define SrcImmFAddr (0xb<<4) /* Source is immediate far address */
-#define SrcMemFAddr (0xc<<4) /* Source is far address in memory */
-#define SrcAcc (0xd<<4) /* Source Accumulator */
-#define SrcImmU16 (0xe<<4) /* Immediate operand, unsigned, 16 bits */
-#define SrcMask (0xf<<4)
+#define SrcNone (0<<5) /* No source operand. */
+#define SrcReg (1<<5) /* Register operand. */
+#define SrcMem (2<<5) /* Memory operand. */
+#define SrcMem16 (3<<5) /* Memory operand (16-bit). */
+#define SrcMem32 (4<<5) /* Memory operand (32-bit). */
+#define SrcImm (5<<5) /* Immediate operand. */
+#define SrcImmByte (6<<5) /* 8-bit sign-extended immediate operand. */
+#define SrcOne (7<<5) /* Implied '1' */
+#define SrcImmUByte (8<<5) /* 8-bit unsigned immediate operand. */
+#define SrcImmU (9<<5) /* Immediate operand, unsigned */
+#define SrcSI (0xa<<5) /* Source is in the DS:RSI */
+#define SrcImmFAddr (0xb<<5) /* Source is immediate far address */
+#define SrcMemFAddr (0xc<<5) /* Source is far address in memory */
+#define SrcAcc (0xd<<5) /* Source Accumulator */
+#define SrcImmU16 (0xe<<5) /* Immediate operand, unsigned, 16 bits */
+#define SrcDX (0xf<<5) /* Source is in DX register */
+#define SrcMask (0xf<<5)
/* Generic ModRM decode. */
-#define ModRM (1<<8)
+#define ModRM (1<<9)
/* Destination is only written; never read. */
-#define Mov (1<<9)
-#define BitOp (1<<10)
-#define MemAbs (1<<11) /* Memory operand is absolute displacement */
-#define String (1<<12) /* String instruction (rep capable) */
-#define Stack (1<<13) /* Stack instruction (push/pop) */
-#define GroupMask (7<<14) /* Opcode uses one of the group mechanisms */
-#define Group (1<<14) /* Bits 3:5 of modrm byte extend opcode */
-#define GroupDual (2<<14) /* Alternate decoding of mod == 3 */
-#define Prefix (3<<14) /* Instruction varies with 66/f2/f3 prefix */
-#define RMExt (4<<14) /* Opcode extension in ModRM r/m if mod == 3 */
-#define Sse (1<<17) /* SSE Vector instruction */
+#define Mov (1<<10)
+#define BitOp (1<<11)
+#define MemAbs (1<<12) /* Memory operand is absolute displacement */
+#define String (1<<13) /* String instruction (rep capable) */
+#define Stack (1<<14) /* Stack instruction (push/pop) */
+#define GroupMask (7<<15) /* Opcode uses one of the group mechanisms */
+#define Group (1<<15) /* Bits 3:5 of modrm byte extend opcode */
+#define GroupDual (2<<15) /* Alternate decoding of mod == 3 */
+#define Prefix (3<<15) /* Instruction varies with 66/f2/f3 prefix */
+#define RMExt (4<<15) /* Opcode extension in ModRM r/m if mod == 3 */
+#define Sse (1<<18) /* SSE Vector instruction */
/* Misc flags */
#define Prot (1<<21) /* instruction generates #UD if not in prot-mode */
#define VendorSpecific (1<<22) /* Vendor specific instruction */
} \
} while (0)
-/* Fetch next part of the instruction being emulated. */
-#define insn_fetch(_type, _size, _eip) \
-({ unsigned long _x; \
- rc = do_insn_fetch(ctxt, ops, (_eip), &_x, (_size)); \
- if (rc != X86EMUL_CONTINUE) \
- goto done; \
- (_eip) += (_size); \
- (_type)_x; \
-})
-
-#define insn_fetch_arr(_arr, _size, _eip) \
-({ rc = do_insn_fetch(ctxt, ops, (_eip), _arr, (_size)); \
- if (rc != X86EMUL_CONTINUE) \
- goto done; \
- (_eip) += (_size); \
-})
-
static int emulator_check_intercept(struct x86_emulate_ctxt *ctxt,
enum x86_intercept intercept,
enum x86_intercept_stage stage)
{
struct x86_instruction_info info = {
.intercept = intercept,
- .rep_prefix = ctxt->decode.rep_prefix,
- .modrm_mod = ctxt->decode.modrm_mod,
- .modrm_reg = ctxt->decode.modrm_reg,
- .modrm_rm = ctxt->decode.modrm_rm,
- .src_val = ctxt->decode.src.val64,
- .src_bytes = ctxt->decode.src.bytes,
- .dst_bytes = ctxt->decode.dst.bytes,
- .ad_bytes = ctxt->decode.ad_bytes,
+ .rep_prefix = ctxt->rep_prefix,
+ .modrm_mod = ctxt->modrm_mod,
+ .modrm_reg = ctxt->modrm_reg,
+ .modrm_rm = ctxt->modrm_rm,
+ .src_val = ctxt->src.val64,
+ .src_bytes = ctxt->src.bytes,
+ .dst_bytes = ctxt->dst.bytes,
+ .ad_bytes = ctxt->ad_bytes,
.next_rip = ctxt->eip,
};
return ctxt->ops->intercept(ctxt, &info, stage);
}
-static inline unsigned long ad_mask(struct decode_cache *c)
+static inline unsigned long ad_mask(struct x86_emulate_ctxt *ctxt)
{
- return (1UL << (c->ad_bytes << 3)) - 1;
+ return (1UL << (ctxt->ad_bytes << 3)) - 1;
}
/* Access/update address held in a register, based on addressing mode. */
static inline unsigned long
-address_mask(struct decode_cache *c, unsigned long reg)
+address_mask(struct x86_emulate_ctxt *ctxt, unsigned long reg)
{
- if (c->ad_bytes == sizeof(unsigned long))
+ if (ctxt->ad_bytes == sizeof(unsigned long))
return reg;
else
- return reg & ad_mask(c);
+ return reg & ad_mask(ctxt);
}
static inline unsigned long
-register_address(struct decode_cache *c, unsigned long reg)
+register_address(struct x86_emulate_ctxt *ctxt, unsigned long reg)
{
- return address_mask(c, reg);
+ return address_mask(ctxt, reg);
}
static inline void
-register_address_increment(struct decode_cache *c, unsigned long *reg, int inc)
+register_address_increment(struct x86_emulate_ctxt *ctxt, unsigned long *reg, int inc)
{
- if (c->ad_bytes == sizeof(unsigned long))
+ if (ctxt->ad_bytes == sizeof(unsigned long))
*reg += inc;
else
- *reg = (*reg & ~ad_mask(c)) | ((*reg + inc) & ad_mask(c));
+ *reg = (*reg & ~ad_mask(ctxt)) | ((*reg + inc) & ad_mask(ctxt));
}
-static inline void jmp_rel(struct decode_cache *c, int rel)
+static inline void jmp_rel(struct x86_emulate_ctxt *ctxt, int rel)
{
- register_address_increment(c, &c->eip, rel);
+ register_address_increment(ctxt, &ctxt->_eip, rel);
}
static u32 desc_limit_scaled(struct desc_struct *desc)
return desc->g ? (limit << 12) | 0xfff : limit;
}
-static void set_seg_override(struct decode_cache *c, int seg)
+static void set_seg_override(struct x86_emulate_ctxt *ctxt, int seg)
{
- c->has_seg_override = true;
- c->seg_override = seg;
+ ctxt->has_seg_override = true;
+ ctxt->seg_override = seg;
}
-static unsigned long seg_base(struct x86_emulate_ctxt *ctxt,
- struct x86_emulate_ops *ops, int seg)
+static unsigned long seg_base(struct x86_emulate_ctxt *ctxt, int seg)
{
if (ctxt->mode == X86EMUL_MODE_PROT64 && seg < VCPU_SREG_FS)
return 0;
- return ops->get_cached_segment_base(ctxt, seg);
+ return ctxt->ops->get_cached_segment_base(ctxt, seg);
}
-static unsigned seg_override(struct x86_emulate_ctxt *ctxt,
- struct decode_cache *c)
+static unsigned seg_override(struct x86_emulate_ctxt *ctxt)
{
- if (!c->has_seg_override)
+ if (!ctxt->has_seg_override)
return 0;
- return c->seg_override;
+ return ctxt->seg_override;
}
static int emulate_exception(struct x86_emulate_ctxt *ctxt, int vec,
unsigned size, bool write, bool fetch,
ulong *linear)
{
- struct decode_cache *c = &ctxt->decode;
struct desc_struct desc;
bool usable;
ulong la;
u16 sel;
unsigned cpl, rpl;
- la = seg_base(ctxt, ctxt->ops, addr.seg) + addr.ea;
+ la = seg_base(ctxt, addr.seg) + addr.ea;
switch (ctxt->mode) {
case X86EMUL_MODE_REAL:
break;
}
break;
}
- if (fetch ? ctxt->mode != X86EMUL_MODE_PROT64 : c->ad_bytes != 8)
+ if (fetch ? ctxt->mode != X86EMUL_MODE_PROT64 : ctxt->ad_bytes != 8)
la &= (u32)-1;
*linear = la;
return X86EMUL_CONTINUE;
return ctxt->ops->read_std(ctxt, linear, data, size, &ctxt->exception);
}
-static int do_fetch_insn_byte(struct x86_emulate_ctxt *ctxt,
- struct x86_emulate_ops *ops,
+static int do_insn_fetch_byte(struct x86_emulate_ctxt *ctxt,
unsigned long eip, u8 *dest)
{
- struct fetch_cache *fc = &ctxt->decode.fetch;
+ struct fetch_cache *fc = &ctxt->fetch;
int rc;
int size, cur_size;
rc = __linearize(ctxt, addr, size, false, true, &linear);
if (rc != X86EMUL_CONTINUE)
return rc;
- rc = ops->fetch(ctxt, linear, fc->data + cur_size,
- size, &ctxt->exception);
+ rc = ctxt->ops->fetch(ctxt, linear, fc->data + cur_size,
+ size, &ctxt->exception);
if (rc != X86EMUL_CONTINUE)
return rc;
fc->end += size;
}
static int do_insn_fetch(struct x86_emulate_ctxt *ctxt,
- struct x86_emulate_ops *ops,
unsigned long eip, void *dest, unsigned size)
{
int rc;
if (eip + size - ctxt->eip > 15)
return X86EMUL_UNHANDLEABLE;
while (size--) {
- rc = do_fetch_insn_byte(ctxt, ops, eip++, dest++);
+ rc = do_insn_fetch_byte(ctxt, eip++, dest++);
if (rc != X86EMUL_CONTINUE)
return rc;
}
return X86EMUL_CONTINUE;
}
+/* Fetch next part of the instruction being emulated. */
+#define insn_fetch(_type, _size, _eip) \
+({ unsigned long _x; \
+ rc = do_insn_fetch(ctxt, (_eip), &_x, (_size)); \
+ if (rc != X86EMUL_CONTINUE) \
+ goto done; \
+ (_eip) += (_size); \
+ (_type)_x; \
+})
+
+#define insn_fetch_arr(_arr, _size, _eip) \
+({ rc = do_insn_fetch(ctxt, (_eip), _arr, (_size)); \
+ if (rc != X86EMUL_CONTINUE) \
+ goto done; \
+ (_eip) += (_size); \
+})
+
/*
* Given the 'reg' portion of a ModRM byte, and a register block, return a
* pointer into the block that addresses the relevant register.
static void decode_register_operand(struct x86_emulate_ctxt *ctxt,
struct operand *op,
- struct decode_cache *c,
int inhibit_bytereg)
{
- unsigned reg = c->modrm_reg;
- int highbyte_regs = c->rex_prefix == 0;
+ unsigned reg = ctxt->modrm_reg;
+ int highbyte_regs = ctxt->rex_prefix == 0;
- if (!(c->d & ModRM))
- reg = (c->b & 7) | ((c->rex_prefix & 1) << 3);
+ if (!(ctxt->d & ModRM))
+ reg = (ctxt->b & 7) | ((ctxt->rex_prefix & 1) << 3);
- if (c->d & Sse) {
+ if (ctxt->d & Sse) {
op->type = OP_XMM;
op->bytes = 16;
op->addr.xmm = reg;
}
op->type = OP_REG;
- if ((c->d & ByteOp) && !inhibit_bytereg) {
- op->addr.reg = decode_register(reg, c->regs, highbyte_regs);
+ if ((ctxt->d & ByteOp) && !inhibit_bytereg) {
+ op->addr.reg = decode_register(reg, ctxt->regs, highbyte_regs);
op->bytes = 1;
} else {
- op->addr.reg = decode_register(reg, c->regs, 0);
- op->bytes = c->op_bytes;
+ op->addr.reg = decode_register(reg, ctxt->regs, 0);
+ op->bytes = ctxt->op_bytes;
}
fetch_register_operand(op);
op->orig_val = op->val;
}
static int decode_modrm(struct x86_emulate_ctxt *ctxt,
- struct x86_emulate_ops *ops,
struct operand *op)
{
- struct decode_cache *c = &ctxt->decode;
u8 sib;
int index_reg = 0, base_reg = 0, scale;
int rc = X86EMUL_CONTINUE;
ulong modrm_ea = 0;
- if (c->rex_prefix) {
- c->modrm_reg = (c->rex_prefix & 4) << 1; /* REX.R */
- index_reg = (c->rex_prefix & 2) << 2; /* REX.X */
- c->modrm_rm = base_reg = (c->rex_prefix & 1) << 3; /* REG.B */
+ if (ctxt->rex_prefix) {
+ ctxt->modrm_reg = (ctxt->rex_prefix & 4) << 1; /* REX.R */
+ index_reg = (ctxt->rex_prefix & 2) << 2; /* REX.X */
+ ctxt->modrm_rm = base_reg = (ctxt->rex_prefix & 1) << 3; /* REG.B */
}
- c->modrm = insn_fetch(u8, 1, c->eip);
- c->modrm_mod |= (c->modrm & 0xc0) >> 6;
- c->modrm_reg |= (c->modrm & 0x38) >> 3;
- c->modrm_rm |= (c->modrm & 0x07);
- c->modrm_seg = VCPU_SREG_DS;
+ ctxt->modrm = insn_fetch(u8, 1, ctxt->_eip);
+ ctxt->modrm_mod |= (ctxt->modrm & 0xc0) >> 6;
+ ctxt->modrm_reg |= (ctxt->modrm & 0x38) >> 3;
+ ctxt->modrm_rm |= (ctxt->modrm & 0x07);
+ ctxt->modrm_seg = VCPU_SREG_DS;
- if (c->modrm_mod == 3) {
+ if (ctxt->modrm_mod == 3) {
op->type = OP_REG;
- op->bytes = (c->d & ByteOp) ? 1 : c->op_bytes;
- op->addr.reg = decode_register(c->modrm_rm,
- c->regs, c->d & ByteOp);
- if (c->d & Sse) {
+ op->bytes = (ctxt->d & ByteOp) ? 1 : ctxt->op_bytes;
+ op->addr.reg = decode_register(ctxt->modrm_rm,
+ ctxt->regs, ctxt->d & ByteOp);
+ if (ctxt->d & Sse) {
op->type = OP_XMM;
op->bytes = 16;
- op->addr.xmm = c->modrm_rm;
- read_sse_reg(ctxt, &op->vec_val, c->modrm_rm);
+ op->addr.xmm = ctxt->modrm_rm;
+ read_sse_reg(ctxt, &op->vec_val, ctxt->modrm_rm);
return rc;
}
fetch_register_operand(op);
op->type = OP_MEM;
- if (c->ad_bytes == 2) {
- unsigned bx = c->regs[VCPU_REGS_RBX];
- unsigned bp = c->regs[VCPU_REGS_RBP];
- unsigned si = c->regs[VCPU_REGS_RSI];
- unsigned di = c->regs[VCPU_REGS_RDI];
+ if (ctxt->ad_bytes == 2) {
+ unsigned bx = ctxt->regs[VCPU_REGS_RBX];
+ unsigned bp = ctxt->regs[VCPU_REGS_RBP];
+ unsigned si = ctxt->regs[VCPU_REGS_RSI];
+ unsigned di = ctxt->regs[VCPU_REGS_RDI];
/* 16-bit ModR/M decode. */
- switch (c->modrm_mod) {
+ switch (ctxt->modrm_mod) {
case 0:
- if (c->modrm_rm == 6)
- modrm_ea += insn_fetch(u16, 2, c->eip);
+ if (ctxt->modrm_rm == 6)
+ modrm_ea += insn_fetch(u16, 2, ctxt->_eip);
break;
case 1:
- modrm_ea += insn_fetch(s8, 1, c->eip);
+ modrm_ea += insn_fetch(s8, 1, ctxt->_eip);
break;
case 2:
- modrm_ea += insn_fetch(u16, 2, c->eip);
+ modrm_ea += insn_fetch(u16, 2, ctxt->_eip);
break;
}
- switch (c->modrm_rm) {
+ switch (ctxt->modrm_rm) {
case 0:
modrm_ea += bx + si;
break;
modrm_ea += di;
break;
case 6:
- if (c->modrm_mod != 0)
+ if (ctxt->modrm_mod != 0)
modrm_ea += bp;
break;
case 7:
modrm_ea += bx;
break;
}
- if (c->modrm_rm == 2 || c->modrm_rm == 3 ||
- (c->modrm_rm == 6 && c->modrm_mod != 0))
- c->modrm_seg = VCPU_SREG_SS;
+ if (ctxt->modrm_rm == 2 || ctxt->modrm_rm == 3 ||
+ (ctxt->modrm_rm == 6 && ctxt->modrm_mod != 0))
+ ctxt->modrm_seg = VCPU_SREG_SS;
modrm_ea = (u16)modrm_ea;
} else {
/* 32/64-bit ModR/M decode. */
- if ((c->modrm_rm & 7) == 4) {
- sib = insn_fetch(u8, 1, c->eip);
+ if ((ctxt->modrm_rm & 7) == 4) {
+ sib = insn_fetch(u8, 1, ctxt->_eip);
index_reg |= (sib >> 3) & 7;
base_reg |= sib & 7;
scale = sib >> 6;
- if ((base_reg & 7) == 5 && c->modrm_mod == 0)
- modrm_ea += insn_fetch(s32, 4, c->eip);
+ if ((base_reg & 7) == 5 && ctxt->modrm_mod == 0)
+ modrm_ea += insn_fetch(s32, 4, ctxt->_eip);
else
- modrm_ea += c->regs[base_reg];
+ modrm_ea += ctxt->regs[base_reg];
if (index_reg != 4)
- modrm_ea += c->regs[index_reg] << scale;
- } else if ((c->modrm_rm & 7) == 5 && c->modrm_mod == 0) {
+ modrm_ea += ctxt->regs[index_reg] << scale;
+ } else if ((ctxt->modrm_rm & 7) == 5 && ctxt->modrm_mod == 0) {
if (ctxt->mode == X86EMUL_MODE_PROT64)
- c->rip_relative = 1;
+ ctxt->rip_relative = 1;
} else
- modrm_ea += c->regs[c->modrm_rm];
- switch (c->modrm_mod) {
+ modrm_ea += ctxt->regs[ctxt->modrm_rm];
+ switch (ctxt->modrm_mod) {
case 0:
- if (c->modrm_rm == 5)
- modrm_ea += insn_fetch(s32, 4, c->eip);
+ if (ctxt->modrm_rm == 5)
+ modrm_ea += insn_fetch(s32, 4, ctxt->_eip);
break;
case 1:
- modrm_ea += insn_fetch(s8, 1, c->eip);
+ modrm_ea += insn_fetch(s8, 1, ctxt->_eip);
break;
case 2:
- modrm_ea += insn_fetch(s32, 4, c->eip);
+ modrm_ea += insn_fetch(s32, 4, ctxt->_eip);
break;
}
}
}
static int decode_abs(struct x86_emulate_ctxt *ctxt,
- struct x86_emulate_ops *ops,
struct operand *op)
{
- struct decode_cache *c = &ctxt->decode;
int rc = X86EMUL_CONTINUE;
op->type = OP_MEM;
- switch (c->ad_bytes) {
+ switch (ctxt->ad_bytes) {
case 2:
- op->addr.mem.ea = insn_fetch(u16, 2, c->eip);
+ op->addr.mem.ea = insn_fetch(u16, 2, ctxt->_eip);
break;
case 4:
- op->addr.mem.ea = insn_fetch(u32, 4, c->eip);
+ op->addr.mem.ea = insn_fetch(u32, 4, ctxt->_eip);
break;
case 8:
- op->addr.mem.ea = insn_fetch(u64, 8, c->eip);
+ op->addr.mem.ea = insn_fetch(u64, 8, ctxt->_eip);
break;
}
done:
return rc;
}
-static void fetch_bit_operand(struct decode_cache *c)
+static void fetch_bit_operand(struct x86_emulate_ctxt *ctxt)
{
long sv = 0, mask;
- if (c->dst.type == OP_MEM && c->src.type == OP_REG) {
- mask = ~(c->dst.bytes * 8 - 1);
+ if (ctxt->dst.type == OP_MEM && ctxt->src.type == OP_REG) {
+ mask = ~(ctxt->dst.bytes * 8 - 1);
- if (c->src.bytes == 2)
- sv = (s16)c->src.val & (s16)mask;
- else if (c->src.bytes == 4)
- sv = (s32)c->src.val & (s32)mask;
+ if (ctxt->src.bytes == 2)
+ sv = (s16)ctxt->src.val & (s16)mask;
+ else if (ctxt->src.bytes == 4)
+ sv = (s32)ctxt->src.val & (s32)mask;
- c->dst.addr.mem.ea += (sv >> 3);
+ ctxt->dst.addr.mem.ea += (sv >> 3);
}
/* only subword offset */
- c->src.val &= (c->dst.bytes << 3) - 1;
+ ctxt->src.val &= (ctxt->dst.bytes << 3) - 1;
}
static int read_emulated(struct x86_emulate_ctxt *ctxt,
- struct x86_emulate_ops *ops,
unsigned long addr, void *dest, unsigned size)
{
int rc;
- struct read_cache *mc = &ctxt->decode.mem_read;
+ struct read_cache *mc = &ctxt->mem_read;
while (size) {
int n = min(size, 8u);
if (mc->pos < mc->end)
goto read_cached;
- rc = ops->read_emulated(ctxt, addr, mc->data + mc->end, n,
- &ctxt->exception);
+ rc = ctxt->ops->read_emulated(ctxt, addr, mc->data + mc->end, n,
+ &ctxt->exception);
if (rc != X86EMUL_CONTINUE)
return rc;
mc->end += n;
rc = linearize(ctxt, addr, size, false, &linear);
if (rc != X86EMUL_CONTINUE)
return rc;
- return read_emulated(ctxt, ctxt->ops, linear, data, size);
+ return read_emulated(ctxt, linear, data, size);
}
static int segmented_write(struct x86_emulate_ctxt *ctxt,
}
static int pio_in_emulated(struct x86_emulate_ctxt *ctxt,
- struct x86_emulate_ops *ops,
unsigned int size, unsigned short port,
void *dest)
{
- struct read_cache *rc = &ctxt->decode.io_read;
+ struct read_cache *rc = &ctxt->io_read;
if (rc->pos == rc->end) { /* refill pio read ahead */
- struct decode_cache *c = &ctxt->decode;
unsigned int in_page, n;
- unsigned int count = c->rep_prefix ?
- address_mask(c, c->regs[VCPU_REGS_RCX]) : 1;
+ unsigned int count = ctxt->rep_prefix ?
+ address_mask(ctxt, ctxt->regs[VCPU_REGS_RCX]) : 1;
in_page = (ctxt->eflags & EFLG_DF) ?
- offset_in_page(c->regs[VCPU_REGS_RDI]) :
- PAGE_SIZE - offset_in_page(c->regs[VCPU_REGS_RDI]);
+ offset_in_page(ctxt->regs[VCPU_REGS_RDI]) :
+ PAGE_SIZE - offset_in_page(ctxt->regs[VCPU_REGS_RDI]);
n = min(min(in_page, (unsigned int)sizeof(rc->data)) / size,
count);
if (n == 0)
n = 1;
rc->pos = rc->end = 0;
- if (!ops->pio_in_emulated(ctxt, size, port, rc->data, n))
+ if (!ctxt->ops->pio_in_emulated(ctxt, size, port, rc->data, n))
return 0;
rc->end = n * size;
}
}
static void get_descriptor_table_ptr(struct x86_emulate_ctxt *ctxt,
- struct x86_emulate_ops *ops,
u16 selector, struct desc_ptr *dt)
{
+ struct x86_emulate_ops *ops = ctxt->ops;
+
if (selector & 1 << 2) {
struct desc_struct desc;
u16 sel;
/* allowed just for 8 bytes segments */
static int read_segment_descriptor(struct x86_emulate_ctxt *ctxt,
- struct x86_emulate_ops *ops,
u16 selector, struct desc_struct *desc)
{
struct desc_ptr dt;
u16 index = selector >> 3;
- int ret;
ulong addr;
- get_descriptor_table_ptr(ctxt, ops, selector, &dt);
+ get_descriptor_table_ptr(ctxt, selector, &dt);
if (dt.size < index * 8 + 7)
return emulate_gp(ctxt, selector & 0xfffc);
- addr = dt.address + index * 8;
- ret = ops->read_std(ctxt, addr, desc, sizeof *desc, &ctxt->exception);
- return ret;
+ addr = dt.address + index * 8;
+ return ctxt->ops->read_std(ctxt, addr, desc, sizeof *desc,
+ &ctxt->exception);
}
/* allowed just for 8 bytes segments */
static int write_segment_descriptor(struct x86_emulate_ctxt *ctxt,
- struct x86_emulate_ops *ops,
u16 selector, struct desc_struct *desc)
{
struct desc_ptr dt;
u16 index = selector >> 3;
ulong addr;
- int ret;
- get_descriptor_table_ptr(ctxt, ops, selector, &dt);
+ get_descriptor_table_ptr(ctxt, selector, &dt);
if (dt.size < index * 8 + 7)
return emulate_gp(ctxt, selector & 0xfffc);
addr = dt.address + index * 8;
- ret = ops->write_std(ctxt, addr, desc, sizeof *desc, &ctxt->exception);
-
- return ret;
+ return ctxt->ops->write_std(ctxt, addr, desc, sizeof *desc,
+ &ctxt->exception);
}
/* Does not support long mode */
static int load_segment_descriptor(struct x86_emulate_ctxt *ctxt,
- struct x86_emulate_ops *ops,
u16 selector, int seg)
{
struct desc_struct seg_desc;
if (null_selector) /* for NULL selector skip all following checks */
goto load;
- ret = read_segment_descriptor(ctxt, ops, selector, &seg_desc);
+ ret = read_segment_descriptor(ctxt, selector, &seg_desc);
if (ret != X86EMUL_CONTINUE)
return ret;
rpl = selector & 3;
dpl = seg_desc.dpl;
- cpl = ops->cpl(ctxt);
+ cpl = ctxt->ops->cpl(ctxt);
switch (seg) {
case VCPU_SREG_SS:
if (seg_desc.s) {
/* mark segment as accessed */
seg_desc.type |= 1;
- ret = write_segment_descriptor(ctxt, ops, selector, &seg_desc);
+ ret = write_segment_descriptor(ctxt, selector, &seg_desc);
if (ret != X86EMUL_CONTINUE)
return ret;
}
load:
- ops->set_segment(ctxt, selector, &seg_desc, 0, seg);
+ ctxt->ops->set_segment(ctxt, selector, &seg_desc, 0, seg);
return X86EMUL_CONTINUE;
exception:
emulate_exception(ctxt, err_vec, err_code, true);
static int writeback(struct x86_emulate_ctxt *ctxt)
{
int rc;
- struct decode_cache *c = &ctxt->decode;
- switch (c->dst.type) {
+ switch (ctxt->dst.type) {
case OP_REG:
- write_register_operand(&c->dst);
+ write_register_operand(&ctxt->dst);
break;
case OP_MEM:
- if (c->lock_prefix)
+ if (ctxt->lock_prefix)
rc = segmented_cmpxchg(ctxt,
- c->dst.addr.mem,
- &c->dst.orig_val,
- &c->dst.val,
- c->dst.bytes);
+ ctxt->dst.addr.mem,
+ &ctxt->dst.orig_val,
+ &ctxt->dst.val,
+ ctxt->dst.bytes);
else
rc = segmented_write(ctxt,
- c->dst.addr.mem,
- &c->dst.val,
- c->dst.bytes);
+ ctxt->dst.addr.mem,
+ &ctxt->dst.val,
+ ctxt->dst.bytes);
if (rc != X86EMUL_CONTINUE)
return rc;
break;
case OP_XMM:
- write_sse_reg(ctxt, &c->dst.vec_val, c->dst.addr.xmm);
+ write_sse_reg(ctxt, &ctxt->dst.vec_val, ctxt->dst.addr.xmm);
break;
case OP_NONE:
/* no writeback */
static int em_push(struct x86_emulate_ctxt *ctxt)
{
- struct decode_cache *c = &ctxt->decode;
struct segmented_address addr;
- register_address_increment(c, &c->regs[VCPU_REGS_RSP], -c->op_bytes);
- addr.ea = register_address(c, c->regs[VCPU_REGS_RSP]);
+ register_address_increment(ctxt, &ctxt->regs[VCPU_REGS_RSP], -ctxt->op_bytes);
+ addr.ea = register_address(ctxt, ctxt->regs[VCPU_REGS_RSP]);
addr.seg = VCPU_SREG_SS;
/* Disable writeback. */
- c->dst.type = OP_NONE;
- return segmented_write(ctxt, addr, &c->src.val, c->op_bytes);
+ ctxt->dst.type = OP_NONE;
+ return segmented_write(ctxt, addr, &ctxt->src.val, ctxt->op_bytes);
}
static int emulate_pop(struct x86_emulate_ctxt *ctxt,
void *dest, int len)
{
- struct decode_cache *c = &ctxt->decode;
int rc;
struct segmented_address addr;
- addr.ea = register_address(c, c->regs[VCPU_REGS_RSP]);
+ addr.ea = register_address(ctxt, ctxt->regs[VCPU_REGS_RSP]);
addr.seg = VCPU_SREG_SS;
rc = segmented_read(ctxt, addr, dest, len);
if (rc != X86EMUL_CONTINUE)
return rc;
- register_address_increment(c, &c->regs[VCPU_REGS_RSP], len);
+ register_address_increment(ctxt, &ctxt->regs[VCPU_REGS_RSP], len);
return rc;
}
static int em_pop(struct x86_emulate_ctxt *ctxt)
{
- struct decode_cache *c = &ctxt->decode;
-
- return emulate_pop(ctxt, &c->dst.val, c->op_bytes);
+ return emulate_pop(ctxt, &ctxt->dst.val, ctxt->op_bytes);
}
static int emulate_popf(struct x86_emulate_ctxt *ctxt,
- struct x86_emulate_ops *ops,
- void *dest, int len)
+ void *dest, int len)
{
int rc;
unsigned long val, change_mask;
int iopl = (ctxt->eflags & X86_EFLAGS_IOPL) >> IOPL_SHIFT;
- int cpl = ops->cpl(ctxt);
+ int cpl = ctxt->ops->cpl(ctxt);
rc = emulate_pop(ctxt, &val, len);
if (rc != X86EMUL_CONTINUE)
static int em_popf(struct x86_emulate_ctxt *ctxt)
{
- struct decode_cache *c = &ctxt->decode;
-
- c->dst.type = OP_REG;
- c->dst.addr.reg = &ctxt->eflags;
- c->dst.bytes = c->op_bytes;
- return emulate_popf(ctxt, ctxt->ops, &c->dst.val, c->op_bytes);
+ ctxt->dst.type = OP_REG;
+ ctxt->dst.addr.reg = &ctxt->eflags;
+ ctxt->dst.bytes = ctxt->op_bytes;
+ return emulate_popf(ctxt, &ctxt->dst.val, ctxt->op_bytes);
}
-static int emulate_push_sreg(struct x86_emulate_ctxt *ctxt,
- struct x86_emulate_ops *ops, int seg)
+static int emulate_push_sreg(struct x86_emulate_ctxt *ctxt, int seg)
{
- struct decode_cache *c = &ctxt->decode;
-
- c->src.val = get_segment_selector(ctxt, seg);
+ ctxt->src.val = get_segment_selector(ctxt, seg);
return em_push(ctxt);
}
-static int emulate_pop_sreg(struct x86_emulate_ctxt *ctxt,
- struct x86_emulate_ops *ops, int seg)
+static int emulate_pop_sreg(struct x86_emulate_ctxt *ctxt, int seg)
{
- struct decode_cache *c = &ctxt->decode;
unsigned long selector;
int rc;
- rc = emulate_pop(ctxt, &selector, c->op_bytes);
+ rc = emulate_pop(ctxt, &selector, ctxt->op_bytes);
if (rc != X86EMUL_CONTINUE)
return rc;
- rc = load_segment_descriptor(ctxt, ops, (u16)selector, seg);
+ rc = load_segment_descriptor(ctxt, (u16)selector, seg);
return rc;
}
static int em_pusha(struct x86_emulate_ctxt *ctxt)
{
- struct decode_cache *c = &ctxt->decode;
- unsigned long old_esp = c->regs[VCPU_REGS_RSP];
+ unsigned long old_esp = ctxt->regs[VCPU_REGS_RSP];
int rc = X86EMUL_CONTINUE;
int reg = VCPU_REGS_RAX;
while (reg <= VCPU_REGS_RDI) {
(reg == VCPU_REGS_RSP) ?
- (c->src.val = old_esp) : (c->src.val = c->regs[reg]);
+ (ctxt->src.val = old_esp) : (ctxt->src.val = ctxt->regs[reg]);
rc = em_push(ctxt);
if (rc != X86EMUL_CONTINUE)
static int em_pushf(struct x86_emulate_ctxt *ctxt)
{
- struct decode_cache *c = &ctxt->decode;
-
- c->src.val = (unsigned long)ctxt->eflags;
+ ctxt->src.val = (unsigned long)ctxt->eflags;
return em_push(ctxt);
}
static int em_popa(struct x86_emulate_ctxt *ctxt)
{
- struct decode_cache *c = &ctxt->decode;
int rc = X86EMUL_CONTINUE;
int reg = VCPU_REGS_RDI;
while (reg >= VCPU_REGS_RAX) {
if (reg == VCPU_REGS_RSP) {
- register_address_increment(c, &c->regs[VCPU_REGS_RSP],
- c->op_bytes);
+ register_address_increment(ctxt, &ctxt->regs[VCPU_REGS_RSP],
+ ctxt->op_bytes);
--reg;
}
- rc = emulate_pop(ctxt, &c->regs[reg], c->op_bytes);
+ rc = emulate_pop(ctxt, &ctxt->regs[reg], ctxt->op_bytes);
if (rc != X86EMUL_CONTINUE)
break;
--reg;
return rc;
}
-int emulate_int_real(struct x86_emulate_ctxt *ctxt,
- struct x86_emulate_ops *ops, int irq)
+int emulate_int_real(struct x86_emulate_ctxt *ctxt, int irq)
{
- struct decode_cache *c = &ctxt->decode;
+ struct x86_emulate_ops *ops = ctxt->ops;
int rc;
struct desc_ptr dt;
gva_t cs_addr;
u16 cs, eip;
/* TODO: Add limit checks */
- c->src.val = ctxt->eflags;
+ ctxt->src.val = ctxt->eflags;
rc = em_push(ctxt);
if (rc != X86EMUL_CONTINUE)
return rc;
ctxt->eflags &= ~(EFLG_IF | EFLG_TF | EFLG_AC);
- c->src.val = get_segment_selector(ctxt, VCPU_SREG_CS);
+ ctxt->src.val = get_segment_selector(ctxt, VCPU_SREG_CS);
rc = em_push(ctxt);
if (rc != X86EMUL_CONTINUE)
return rc;
- c->src.val = c->eip;
+ ctxt->src.val = ctxt->_eip;
rc = em_push(ctxt);
if (rc != X86EMUL_CONTINUE)
return rc;
if (rc != X86EMUL_CONTINUE)
return rc;
- rc = load_segment_descriptor(ctxt, ops, cs, VCPU_SREG_CS);
+ rc = load_segment_descriptor(ctxt, cs, VCPU_SREG_CS);
if (rc != X86EMUL_CONTINUE)
return rc;
- c->eip = eip;
+ ctxt->_eip = eip;
return rc;
}
-static int emulate_int(struct x86_emulate_ctxt *ctxt,
- struct x86_emulate_ops *ops, int irq)
+static int emulate_int(struct x86_emulate_ctxt *ctxt, int irq)
{
switch(ctxt->mode) {
case X86EMUL_MODE_REAL:
- return emulate_int_real(ctxt, ops, irq);
+ return emulate_int_real(ctxt, irq);
case X86EMUL_MODE_VM86:
case X86EMUL_MODE_PROT16:
case X86EMUL_MODE_PROT32:
}
}
-static int emulate_iret_real(struct x86_emulate_ctxt *ctxt,
- struct x86_emulate_ops *ops)
+static int emulate_iret_real(struct x86_emulate_ctxt *ctxt)
{
- struct decode_cache *c = &ctxt->decode;
int rc = X86EMUL_CONTINUE;
unsigned long temp_eip = 0;
unsigned long temp_eflags = 0;
/* TODO: Add stack limit check */
- rc = emulate_pop(ctxt, &temp_eip, c->op_bytes);
+ rc = emulate_pop(ctxt, &temp_eip, ctxt->op_bytes);
if (rc != X86EMUL_CONTINUE)
return rc;
if (temp_eip & ~0xffff)
return emulate_gp(ctxt, 0);
- rc = emulate_pop(ctxt, &cs, c->op_bytes);
+ rc = emulate_pop(ctxt, &cs, ctxt->op_bytes);
if (rc != X86EMUL_CONTINUE)
return rc;
- rc = emulate_pop(ctxt, &temp_eflags, c->op_bytes);
+ rc = emulate_pop(ctxt, &temp_eflags, ctxt->op_bytes);
if (rc != X86EMUL_CONTINUE)
return rc;
- rc = load_segment_descriptor(ctxt, ops, (u16)cs, VCPU_SREG_CS);
+ rc = load_segment_descriptor(ctxt, (u16)cs, VCPU_SREG_CS);
if (rc != X86EMUL_CONTINUE)
return rc;
- c->eip = temp_eip;
+ ctxt->_eip = temp_eip;
- if (c->op_bytes == 4)
+ if (ctxt->op_bytes == 4)
ctxt->eflags = ((temp_eflags & mask) | (ctxt->eflags & vm86_mask));
- else if (c->op_bytes == 2) {
+ else if (ctxt->op_bytes == 2) {
ctxt->eflags &= ~0xffff;
ctxt->eflags |= temp_eflags;
}
return rc;
}
-static inline int emulate_iret(struct x86_emulate_ctxt *ctxt,
- struct x86_emulate_ops* ops)
+static int em_iret(struct x86_emulate_ctxt *ctxt)
{
switch(ctxt->mode) {
case X86EMUL_MODE_REAL:
- return emulate_iret_real(ctxt, ops);
+ return emulate_iret_real(ctxt);
case X86EMUL_MODE_VM86:
case X86EMUL_MODE_PROT16:
case X86EMUL_MODE_PROT32:
static int em_jmp_far(struct x86_emulate_ctxt *ctxt)
{
- struct decode_cache *c = &ctxt->decode;
int rc;
unsigned short sel;
- memcpy(&sel, c->src.valptr + c->op_bytes, 2);
+ memcpy(&sel, ctxt->src.valptr + ctxt->op_bytes, 2);
- rc = load_segment_descriptor(ctxt, ctxt->ops, sel, VCPU_SREG_CS);
+ rc = load_segment_descriptor(ctxt, sel, VCPU_SREG_CS);
if (rc != X86EMUL_CONTINUE)
return rc;
- c->eip = 0;
- memcpy(&c->eip, c->src.valptr, c->op_bytes);
+ ctxt->_eip = 0;
+ memcpy(&ctxt->_eip, ctxt->src.valptr, ctxt->op_bytes);
return X86EMUL_CONTINUE;
}
static int em_grp1a(struct x86_emulate_ctxt *ctxt)
{
- struct decode_cache *c = &ctxt->decode;
-
- return emulate_pop(ctxt, &c->dst.val, c->dst.bytes);
+ return emulate_pop(ctxt, &ctxt->dst.val, ctxt->dst.bytes);
}
static int em_grp2(struct x86_emulate_ctxt *ctxt)
{
- struct decode_cache *c = &ctxt->decode;
- switch (c->modrm_reg) {
+ switch (ctxt->modrm_reg) {
case 0: /* rol */
- emulate_2op_SrcB("rol", c->src, c->dst, ctxt->eflags);
+ emulate_2op_SrcB("rol", ctxt->src, ctxt->dst, ctxt->eflags);
break;
case 1: /* ror */
- emulate_2op_SrcB("ror", c->src, c->dst, ctxt->eflags);
+ emulate_2op_SrcB("ror", ctxt->src, ctxt->dst, ctxt->eflags);
break;
case 2: /* rcl */
- emulate_2op_SrcB("rcl", c->src, c->dst, ctxt->eflags);
+ emulate_2op_SrcB("rcl", ctxt->src, ctxt->dst, ctxt->eflags);
break;
case 3: /* rcr */
- emulate_2op_SrcB("rcr", c->src, c->dst, ctxt->eflags);
+ emulate_2op_SrcB("rcr", ctxt->src, ctxt->dst, ctxt->eflags);
break;
case 4: /* sal/shl */
case 6: /* sal/shl */
- emulate_2op_SrcB("sal", c->src, c->dst, ctxt->eflags);
+ emulate_2op_SrcB("sal", ctxt->src, ctxt->dst, ctxt->eflags);
break;
case 5: /* shr */
- emulate_2op_SrcB("shr", c->src, c->dst, ctxt->eflags);
+ emulate_2op_SrcB("shr", ctxt->src, ctxt->dst, ctxt->eflags);
break;
case 7: /* sar */
- emulate_2op_SrcB("sar", c->src, c->dst, ctxt->eflags);
+ emulate_2op_SrcB("sar", ctxt->src, ctxt->dst, ctxt->eflags);
break;
}
return X86EMUL_CONTINUE;
static int em_grp3(struct x86_emulate_ctxt *ctxt)
{
- struct decode_cache *c = &ctxt->decode;
- unsigned long *rax = &c->regs[VCPU_REGS_RAX];
- unsigned long *rdx = &c->regs[VCPU_REGS_RDX];
+ unsigned long *rax = &ctxt->regs[VCPU_REGS_RAX];
+ unsigned long *rdx = &ctxt->regs[VCPU_REGS_RDX];
u8 de = 0;
- switch (c->modrm_reg) {
+ switch (ctxt->modrm_reg) {
case 0 ... 1: /* test */
- emulate_2op_SrcV("test", c->src, c->dst, ctxt->eflags);
+ emulate_2op_SrcV("test", ctxt->src, ctxt->dst, ctxt->eflags);
break;
case 2: /* not */
- c->dst.val = ~c->dst.val;
+ ctxt->dst.val = ~ctxt->dst.val;
break;
case 3: /* neg */
- emulate_1op("neg", c->dst, ctxt->eflags);
+ emulate_1op("neg", ctxt->dst, ctxt->eflags);
break;
case 4: /* mul */
- emulate_1op_rax_rdx("mul", c->src, *rax, *rdx, ctxt->eflags);
+ emulate_1op_rax_rdx("mul", ctxt->src, *rax, *rdx, ctxt->eflags);
break;
case 5: /* imul */
- emulate_1op_rax_rdx("imul", c->src, *rax, *rdx, ctxt->eflags);
+ emulate_1op_rax_rdx("imul", ctxt->src, *rax, *rdx, ctxt->eflags);
break;
case 6: /* div */
- emulate_1op_rax_rdx_ex("div", c->src, *rax, *rdx,
+ emulate_1op_rax_rdx_ex("div", ctxt->src, *rax, *rdx,
ctxt->eflags, de);
break;
case 7: /* idiv */
- emulate_1op_rax_rdx_ex("idiv", c->src, *rax, *rdx,
+ emulate_1op_rax_rdx_ex("idiv", ctxt->src, *rax, *rdx,
ctxt->eflags, de);
break;
default:
static int em_grp45(struct x86_emulate_ctxt *ctxt)
{
- struct decode_cache *c = &ctxt->decode;
int rc = X86EMUL_CONTINUE;
- switch (c->modrm_reg) {
+ switch (ctxt->modrm_reg) {
case 0: /* inc */
- emulate_1op("inc", c->dst, ctxt->eflags);
+ emulate_1op("inc", ctxt->dst, ctxt->eflags);
break;
case 1: /* dec */
- emulate_1op("dec", c->dst, ctxt->eflags);
+ emulate_1op("dec", ctxt->dst, ctxt->eflags);
break;
case 2: /* call near abs */ {
long int old_eip;
- old_eip = c->eip;
- c->eip = c->src.val;
- c->src.val = old_eip;
+ old_eip = ctxt->_eip;
+ ctxt->_eip = ctxt->src.val;
+ ctxt->src.val = old_eip;
rc = em_push(ctxt);
break;
}
case 4: /* jmp abs */
- c->eip = c->src.val;
+ ctxt->_eip = ctxt->src.val;
break;
case 5: /* jmp far */
rc = em_jmp_far(ctxt);
static int em_grp9(struct x86_emulate_ctxt *ctxt)
{
- struct decode_cache *c = &ctxt->decode;
- u64 old = c->dst.orig_val64;
+ u64 old = ctxt->dst.orig_val64;
- if (((u32) (old >> 0) != (u32) c->regs[VCPU_REGS_RAX]) ||
- ((u32) (old >> 32) != (u32) c->regs[VCPU_REGS_RDX])) {
- c->regs[VCPU_REGS_RAX] = (u32) (old >> 0);
- c->regs[VCPU_REGS_RDX] = (u32) (old >> 32);
+ if (((u32) (old >> 0) != (u32) ctxt->regs[VCPU_REGS_RAX]) ||
+ ((u32) (old >> 32) != (u32) ctxt->regs[VCPU_REGS_RDX])) {
+ ctxt->regs[VCPU_REGS_RAX] = (u32) (old >> 0);
+ ctxt->regs[VCPU_REGS_RDX] = (u32) (old >> 32);
ctxt->eflags &= ~EFLG_ZF;
} else {
- c->dst.val64 = ((u64)c->regs[VCPU_REGS_RCX] << 32) |
- (u32) c->regs[VCPU_REGS_RBX];
+ ctxt->dst.val64 = ((u64)ctxt->regs[VCPU_REGS_RCX] << 32) |
+ (u32) ctxt->regs[VCPU_REGS_RBX];
ctxt->eflags |= EFLG_ZF;
}
return X86EMUL_CONTINUE;
}
-static int emulate_ret_far(struct x86_emulate_ctxt *ctxt,
- struct x86_emulate_ops *ops)
+static int em_ret(struct x86_emulate_ctxt *ctxt)
+{
+ ctxt->dst.type = OP_REG;
+ ctxt->dst.addr.reg = &ctxt->_eip;
+ ctxt->dst.bytes = ctxt->op_bytes;
+ return em_pop(ctxt);
+}
+
+static int em_ret_far(struct x86_emulate_ctxt *ctxt)
{
- struct decode_cache *c = &ctxt->decode;
int rc;
unsigned long cs;
- rc = emulate_pop(ctxt, &c->eip, c->op_bytes);
+ rc = emulate_pop(ctxt, &ctxt->_eip, ctxt->op_bytes);
if (rc != X86EMUL_CONTINUE)
return rc;
- if (c->op_bytes == 4)
- c->eip = (u32)c->eip;
- rc = emulate_pop(ctxt, &cs, c->op_bytes);
+ if (ctxt->op_bytes == 4)
+ ctxt->_eip = (u32)ctxt->_eip;
+ rc = emulate_pop(ctxt, &cs, ctxt->op_bytes);
if (rc != X86EMUL_CONTINUE)
return rc;
- rc = load_segment_descriptor(ctxt, ops, (u16)cs, VCPU_SREG_CS);
+ rc = load_segment_descriptor(ctxt, (u16)cs, VCPU_SREG_CS);
return rc;
}
-static int emulate_load_segment(struct x86_emulate_ctxt *ctxt,
- struct x86_emulate_ops *ops, int seg)
+static int emulate_load_segment(struct x86_emulate_ctxt *ctxt, int seg)
{
- struct decode_cache *c = &ctxt->decode;
unsigned short sel;
int rc;
- memcpy(&sel, c->src.valptr + c->op_bytes, 2);
+ memcpy(&sel, ctxt->src.valptr + ctxt->op_bytes, 2);
- rc = load_segment_descriptor(ctxt, ops, sel, seg);
+ rc = load_segment_descriptor(ctxt, sel, seg);
if (rc != X86EMUL_CONTINUE)
return rc;
- c->dst.val = c->src.val;
+ ctxt->dst.val = ctxt->src.val;
return rc;
}
-static inline void
+static void
setup_syscalls_segments(struct x86_emulate_ctxt *ctxt,
- struct x86_emulate_ops *ops, struct desc_struct *cs,
- struct desc_struct *ss)
+ struct desc_struct *cs, struct desc_struct *ss)
{
u16 selector;
memset(cs, 0, sizeof(struct desc_struct));
- ops->get_segment(ctxt, &selector, cs, NULL, VCPU_SREG_CS);
+ ctxt->ops->get_segment(ctxt, &selector, cs, NULL, VCPU_SREG_CS);
memset(ss, 0, sizeof(struct desc_struct));
cs->l = 0; /* will be adjusted later */
ss->p = 1;
}
-static int
-emulate_syscall(struct x86_emulate_ctxt *ctxt, struct x86_emulate_ops *ops)
+static int em_syscall(struct x86_emulate_ctxt *ctxt)
{
- struct decode_cache *c = &ctxt->decode;
+ struct x86_emulate_ops *ops = ctxt->ops;
struct desc_struct cs, ss;
u64 msr_data;
u16 cs_sel, ss_sel;
return emulate_ud(ctxt);
ops->get_msr(ctxt, MSR_EFER, &efer);
- setup_syscalls_segments(ctxt, ops, &cs, &ss);
+ setup_syscalls_segments(ctxt, &cs, &ss);
ops->get_msr(ctxt, MSR_STAR, &msr_data);
msr_data >>= 32;
ops->set_segment(ctxt, cs_sel, &cs, 0, VCPU_SREG_CS);
ops->set_segment(ctxt, ss_sel, &ss, 0, VCPU_SREG_SS);
- c->regs[VCPU_REGS_RCX] = c->eip;
+ ctxt->regs[VCPU_REGS_RCX] = ctxt->_eip;
if (efer & EFER_LMA) {
#ifdef CONFIG_X86_64
- c->regs[VCPU_REGS_R11] = ctxt->eflags & ~EFLG_RF;
+ ctxt->regs[VCPU_REGS_R11] = ctxt->eflags & ~EFLG_RF;
ops->get_msr(ctxt,
ctxt->mode == X86EMUL_MODE_PROT64 ?
MSR_LSTAR : MSR_CSTAR, &msr_data);
- c->eip = msr_data;
+ ctxt->_eip = msr_data;
ops->get_msr(ctxt, MSR_SYSCALL_MASK, &msr_data);
ctxt->eflags &= ~(msr_data | EFLG_RF);
} else {
/* legacy mode */
ops->get_msr(ctxt, MSR_STAR, &msr_data);
- c->eip = (u32)msr_data;
+ ctxt->_eip = (u32)msr_data;
ctxt->eflags &= ~(EFLG_VM | EFLG_IF | EFLG_RF);
}
return X86EMUL_CONTINUE;
}
-static int
-emulate_sysenter(struct x86_emulate_ctxt *ctxt, struct x86_emulate_ops *ops)
+static int em_sysenter(struct x86_emulate_ctxt *ctxt)
{
- struct decode_cache *c = &ctxt->decode;
+ struct x86_emulate_ops *ops = ctxt->ops;
struct desc_struct cs, ss;
u64 msr_data;
u16 cs_sel, ss_sel;
u64 efer = 0;
- ctxt->ops->get_msr(ctxt, MSR_EFER, &efer);
+ ops->get_msr(ctxt, MSR_EFER, &efer);
/* inject #GP if in real mode */
if (ctxt->mode == X86EMUL_MODE_REAL)
return emulate_gp(ctxt, 0);
if (ctxt->mode == X86EMUL_MODE_PROT64)
return emulate_ud(ctxt);
- setup_syscalls_segments(ctxt, ops, &cs, &ss);
+ setup_syscalls_segments(ctxt, &cs, &ss);
ops->get_msr(ctxt, MSR_IA32_SYSENTER_CS, &msr_data);
switch (ctxt->mode) {
ops->set_segment(ctxt, ss_sel, &ss, 0, VCPU_SREG_SS);
ops->get_msr(ctxt, MSR_IA32_SYSENTER_EIP, &msr_data);
- c->eip = msr_data;
+ ctxt->_eip = msr_data;
ops->get_msr(ctxt, MSR_IA32_SYSENTER_ESP, &msr_data);
- c->regs[VCPU_REGS_RSP] = msr_data;
+ ctxt->regs[VCPU_REGS_RSP] = msr_data;
return X86EMUL_CONTINUE;
}
-static int
-emulate_sysexit(struct x86_emulate_ctxt *ctxt, struct x86_emulate_ops *ops)
+static int em_sysexit(struct x86_emulate_ctxt *ctxt)
{
- struct decode_cache *c = &ctxt->decode;
+ struct x86_emulate_ops *ops = ctxt->ops;
struct desc_struct cs, ss;
u64 msr_data;
int usermode;
- u16 cs_sel, ss_sel;
+ u16 cs_sel = 0, ss_sel = 0;
/* inject #GP if in real mode or Virtual 8086 mode */
if (ctxt->mode == X86EMUL_MODE_REAL ||
ctxt->mode == X86EMUL_MODE_VM86)
return emulate_gp(ctxt, 0);
- setup_syscalls_segments(ctxt, ops, &cs, &ss);
+ setup_syscalls_segments(ctxt, &cs, &ss);
- if ((c->rex_prefix & 0x8) != 0x0)
+ if ((ctxt->rex_prefix & 0x8) != 0x0)
usermode = X86EMUL_MODE_PROT64;
else
usermode = X86EMUL_MODE_PROT32;
ops->set_segment(ctxt, cs_sel, &cs, 0, VCPU_SREG_CS);
ops->set_segment(ctxt, ss_sel, &ss, 0, VCPU_SREG_SS);
- c->eip = c->regs[VCPU_REGS_RDX];
- c->regs[VCPU_REGS_RSP] = c->regs[VCPU_REGS_RCX];
+ ctxt->_eip = ctxt->regs[VCPU_REGS_RDX];
+ ctxt->regs[VCPU_REGS_RSP] = ctxt->regs[VCPU_REGS_RCX];
return X86EMUL_CONTINUE;
}
-static bool emulator_bad_iopl(struct x86_emulate_ctxt *ctxt,
- struct x86_emulate_ops *ops)
+static bool emulator_bad_iopl(struct x86_emulate_ctxt *ctxt)
{
int iopl;
if (ctxt->mode == X86EMUL_MODE_REAL)
if (ctxt->mode == X86EMUL_MODE_VM86)
return true;
iopl = (ctxt->eflags & X86_EFLAGS_IOPL) >> IOPL_SHIFT;
- return ops->cpl(ctxt) > iopl;
+ return ctxt->ops->cpl(ctxt) > iopl;
}
static bool emulator_io_port_access_allowed(struct x86_emulate_ctxt *ctxt,
- struct x86_emulate_ops *ops,
u16 port, u16 len)
{
+ struct x86_emulate_ops *ops = ctxt->ops;
struct desc_struct tr_seg;
u32 base3;
int r;
}
static bool emulator_io_permited(struct x86_emulate_ctxt *ctxt,
- struct x86_emulate_ops *ops,
u16 port, u16 len)
{
if (ctxt->perm_ok)
return true;
- if (emulator_bad_iopl(ctxt, ops))
- if (!emulator_io_port_access_allowed(ctxt, ops, port, len))
+ if (emulator_bad_iopl(ctxt))
+ if (!emulator_io_port_access_allowed(ctxt, port, len))
return false;
ctxt->perm_ok = true;
}
static void save_state_to_tss16(struct x86_emulate_ctxt *ctxt,
- struct x86_emulate_ops *ops,
struct tss_segment_16 *tss)
{
- struct decode_cache *c = &ctxt->decode;
-
- tss->ip = c->eip;
+ tss->ip = ctxt->_eip;
tss->flag = ctxt->eflags;
- tss->ax = c->regs[VCPU_REGS_RAX];
- tss->cx = c->regs[VCPU_REGS_RCX];
- tss->dx = c->regs[VCPU_REGS_RDX];
- tss->bx = c->regs[VCPU_REGS_RBX];
- tss->sp = c->regs[VCPU_REGS_RSP];
- tss->bp = c->regs[VCPU_REGS_RBP];
- tss->si = c->regs[VCPU_REGS_RSI];
- tss->di = c->regs[VCPU_REGS_RDI];
+ tss->ax = ctxt->regs[VCPU_REGS_RAX];
+ tss->cx = ctxt->regs[VCPU_REGS_RCX];
+ tss->dx = ctxt->regs[VCPU_REGS_RDX];
+ tss->bx = ctxt->regs[VCPU_REGS_RBX];
+ tss->sp = ctxt->regs[VCPU_REGS_RSP];
+ tss->bp = ctxt->regs[VCPU_REGS_RBP];
+ tss->si = ctxt->regs[VCPU_REGS_RSI];
+ tss->di = ctxt->regs[VCPU_REGS_RDI];
tss->es = get_segment_selector(ctxt, VCPU_SREG_ES);
tss->cs = get_segment_selector(ctxt, VCPU_SREG_CS);
}
static int load_state_from_tss16(struct x86_emulate_ctxt *ctxt,
- struct x86_emulate_ops *ops,
struct tss_segment_16 *tss)
{
- struct decode_cache *c = &ctxt->decode;
int ret;
- c->eip = tss->ip;
+ ctxt->_eip = tss->ip;
ctxt->eflags = tss->flag | 2;
- c->regs[VCPU_REGS_RAX] = tss->ax;
- c->regs[VCPU_REGS_RCX] = tss->cx;
- c->regs[VCPU_REGS_RDX] = tss->dx;
- c->regs[VCPU_REGS_RBX] = tss->bx;
- c->regs[VCPU_REGS_RSP] = tss->sp;
- c->regs[VCPU_REGS_RBP] = tss->bp;
- c->regs[VCPU_REGS_RSI] = tss->si;
- c->regs[VCPU_REGS_RDI] = tss->di;
+ ctxt->regs[VCPU_REGS_RAX] = tss->ax;
+ ctxt->regs[VCPU_REGS_RCX] = tss->cx;
+ ctxt->regs[VCPU_REGS_RDX] = tss->dx;
+ ctxt->regs[VCPU_REGS_RBX] = tss->bx;
+ ctxt->regs[VCPU_REGS_RSP] = tss->sp;
+ ctxt->regs[VCPU_REGS_RBP] = tss->bp;
+ ctxt->regs[VCPU_REGS_RSI] = tss->si;
+ ctxt->regs[VCPU_REGS_RDI] = tss->di;
/*
* SDM says that segment selectors are loaded before segment
* Now load segment descriptors. If fault happenes at this stage
* it is handled in a context of new task
*/
- ret = load_segment_descriptor(ctxt, ops, tss->ldt, VCPU_SREG_LDTR);
+ ret = load_segment_descriptor(ctxt, tss->ldt, VCPU_SREG_LDTR);
if (ret != X86EMUL_CONTINUE)
return ret;
- ret = load_segment_descriptor(ctxt, ops, tss->es, VCPU_SREG_ES);
+ ret = load_segment_descriptor(ctxt, tss->es, VCPU_SREG_ES);
if (ret != X86EMUL_CONTINUE)
return ret;
- ret = load_segment_descriptor(ctxt, ops, tss->cs, VCPU_SREG_CS);
+ ret = load_segment_descriptor(ctxt, tss->cs, VCPU_SREG_CS);
if (ret != X86EMUL_CONTINUE)
return ret;
- ret = load_segment_descriptor(ctxt, ops, tss->ss, VCPU_SREG_SS);
+ ret = load_segment_descriptor(ctxt, tss->ss, VCPU_SREG_SS);
if (ret != X86EMUL_CONTINUE)
return ret;
- ret = load_segment_descriptor(ctxt, ops, tss->ds, VCPU_SREG_DS);
+ ret = load_segment_descriptor(ctxt, tss->ds, VCPU_SREG_DS);
if (ret != X86EMUL_CONTINUE)
return ret;
}
static int task_switch_16(struct x86_emulate_ctxt *ctxt,
- struct x86_emulate_ops *ops,
u16 tss_selector, u16 old_tss_sel,
ulong old_tss_base, struct desc_struct *new_desc)
{
+ struct x86_emulate_ops *ops = ctxt->ops;
struct tss_segment_16 tss_seg;
int ret;
u32 new_tss_base = get_desc_base(new_desc);
/* FIXME: need to provide precise fault address */
return ret;
- save_state_to_tss16(ctxt, ops, &tss_seg);
+ save_state_to_tss16(ctxt, &tss_seg);
ret = ops->write_std(ctxt, old_tss_base, &tss_seg, sizeof tss_seg,
&ctxt->exception);
return ret;
}
- return load_state_from_tss16(ctxt, ops, &tss_seg);
+ return load_state_from_tss16(ctxt, &tss_seg);
}
static void save_state_to_tss32(struct x86_emulate_ctxt *ctxt,
- struct x86_emulate_ops *ops,
struct tss_segment_32 *tss)
{
- struct decode_cache *c = &ctxt->decode;
-
- tss->cr3 = ops->get_cr(ctxt, 3);
- tss->eip = c->eip;
+ tss->cr3 = ctxt->ops->get_cr(ctxt, 3);
+ tss->eip = ctxt->_eip;
tss->eflags = ctxt->eflags;
- tss->eax = c->regs[VCPU_REGS_RAX];
- tss->ecx = c->regs[VCPU_REGS_RCX];
- tss->edx = c->regs[VCPU_REGS_RDX];
- tss->ebx = c->regs[VCPU_REGS_RBX];
- tss->esp = c->regs[VCPU_REGS_RSP];
- tss->ebp = c->regs[VCPU_REGS_RBP];
- tss->esi = c->regs[VCPU_REGS_RSI];
- tss->edi = c->regs[VCPU_REGS_RDI];
+ tss->eax = ctxt->regs[VCPU_REGS_RAX];
+ tss->ecx = ctxt->regs[VCPU_REGS_RCX];
+ tss->edx = ctxt->regs[VCPU_REGS_RDX];
+ tss->ebx = ctxt->regs[VCPU_REGS_RBX];
+ tss->esp = ctxt->regs[VCPU_REGS_RSP];
+ tss->ebp = ctxt->regs[VCPU_REGS_RBP];
+ tss->esi = ctxt->regs[VCPU_REGS_RSI];
+ tss->edi = ctxt->regs[VCPU_REGS_RDI];
tss->es = get_segment_selector(ctxt, VCPU_SREG_ES);
tss->cs = get_segment_selector(ctxt, VCPU_SREG_CS);
}
static int load_state_from_tss32(struct x86_emulate_ctxt *ctxt,
- struct x86_emulate_ops *ops,
struct tss_segment_32 *tss)
{
- struct decode_cache *c = &ctxt->decode;
int ret;
- if (ops->set_cr(ctxt, 3, tss->cr3))
+ if (ctxt->ops->set_cr(ctxt, 3, tss->cr3))
return emulate_gp(ctxt, 0);
- c->eip = tss->eip;
+ ctxt->_eip = tss->eip;
ctxt->eflags = tss->eflags | 2;
- c->regs[VCPU_REGS_RAX] = tss->eax;
- c->regs[VCPU_REGS_RCX] = tss->ecx;
- c->regs[VCPU_REGS_RDX] = tss->edx;
- c->regs[VCPU_REGS_RBX] = tss->ebx;
- c->regs[VCPU_REGS_RSP] = tss->esp;
- c->regs[VCPU_REGS_RBP] = tss->ebp;
- c->regs[VCPU_REGS_RSI] = tss->esi;
- c->regs[VCPU_REGS_RDI] = tss->edi;
+ ctxt->regs[VCPU_REGS_RAX] = tss->eax;
+ ctxt->regs[VCPU_REGS_RCX] = tss->ecx;
+ ctxt->regs[VCPU_REGS_RDX] = tss->edx;
+ ctxt->regs[VCPU_REGS_RBX] = tss->ebx;
+ ctxt->regs[VCPU_REGS_RSP] = tss->esp;
+ ctxt->regs[VCPU_REGS_RBP] = tss->ebp;
+ ctxt->regs[VCPU_REGS_RSI] = tss->esi;
+ ctxt->regs[VCPU_REGS_RDI] = tss->edi;
/*
* SDM says that segment selectors are loaded before segment
* Now load segment descriptors. If fault happenes at this stage
* it is handled in a context of new task
*/
- ret = load_segment_descriptor(ctxt, ops, tss->ldt_selector, VCPU_SREG_LDTR);
+ ret = load_segment_descriptor(ctxt, tss->ldt_selector, VCPU_SREG_LDTR);
if (ret != X86EMUL_CONTINUE)
return ret;
- ret = load_segment_descriptor(ctxt, ops, tss->es, VCPU_SREG_ES);
+ ret = load_segment_descriptor(ctxt, tss->es, VCPU_SREG_ES);
if (ret != X86EMUL_CONTINUE)
return ret;
- ret = load_segment_descriptor(ctxt, ops, tss->cs, VCPU_SREG_CS);
+ ret = load_segment_descriptor(ctxt, tss->cs, VCPU_SREG_CS);
if (ret != X86EMUL_CONTINUE)
return ret;
- ret = load_segment_descriptor(ctxt, ops, tss->ss, VCPU_SREG_SS);
+ ret = load_segment_descriptor(ctxt, tss->ss, VCPU_SREG_SS);
if (ret != X86EMUL_CONTINUE)
return ret;
- ret = load_segment_descriptor(ctxt, ops, tss->ds, VCPU_SREG_DS);
+ ret = load_segment_descriptor(ctxt, tss->ds, VCPU_SREG_DS);
if (ret != X86EMUL_CONTINUE)
return ret;
- ret = load_segment_descriptor(ctxt, ops, tss->fs, VCPU_SREG_FS);
+ ret = load_segment_descriptor(ctxt, tss->fs, VCPU_SREG_FS);
if (ret != X86EMUL_CONTINUE)
return ret;
- ret = load_segment_descriptor(ctxt, ops, tss->gs, VCPU_SREG_GS);
+ ret = load_segment_descriptor(ctxt, tss->gs, VCPU_SREG_GS);
if (ret != X86EMUL_CONTINUE)
return ret;
}
static int task_switch_32(struct x86_emulate_ctxt *ctxt,
- struct x86_emulate_ops *ops,
u16 tss_selector, u16 old_tss_sel,
ulong old_tss_base, struct desc_struct *new_desc)
{
+ struct x86_emulate_ops *ops = ctxt->ops;
struct tss_segment_32 tss_seg;
int ret;
u32 new_tss_base = get_desc_base(new_desc);
/* FIXME: need to provide precise fault address */
return ret;
- save_state_to_tss32(ctxt, ops, &tss_seg);
+ save_state_to_tss32(ctxt, &tss_seg);
ret = ops->write_std(ctxt, old_tss_base, &tss_seg, sizeof tss_seg,
&ctxt->exception);
return ret;
}
- return load_state_from_tss32(ctxt, ops, &tss_seg);
+ return load_state_from_tss32(ctxt, &tss_seg);
}
static int emulator_do_task_switch(struct x86_emulate_ctxt *ctxt,
- struct x86_emulate_ops *ops,
u16 tss_selector, int reason,
bool has_error_code, u32 error_code)
{
+ struct x86_emulate_ops *ops = ctxt->ops;
struct desc_struct curr_tss_desc, next_tss_desc;
int ret;
u16 old_tss_sel = get_segment_selector(ctxt, VCPU_SREG_TR);
/* FIXME: old_tss_base == ~0 ? */
- ret = read_segment_descriptor(ctxt, ops, tss_selector, &next_tss_desc);
+ ret = read_segment_descriptor(ctxt, tss_selector, &next_tss_desc);
if (ret != X86EMUL_CONTINUE)
return ret;
- ret = read_segment_descriptor(ctxt, ops, old_tss_sel, &curr_tss_desc);
+ ret = read_segment_descriptor(ctxt, old_tss_sel, &curr_tss_desc);
if (ret != X86EMUL_CONTINUE)
return ret;
if (reason == TASK_SWITCH_IRET || reason == TASK_SWITCH_JMP) {
curr_tss_desc.type &= ~(1 << 1); /* clear busy flag */
- write_segment_descriptor(ctxt, ops, old_tss_sel,
- &curr_tss_desc);
+ write_segment_descriptor(ctxt, old_tss_sel, &curr_tss_desc);
}
if (reason == TASK_SWITCH_IRET)
old_tss_sel = 0xffff;
if (next_tss_desc.type & 8)
- ret = task_switch_32(ctxt, ops, tss_selector, old_tss_sel,
+ ret = task_switch_32(ctxt, tss_selector, old_tss_sel,
old_tss_base, &next_tss_desc);
else
- ret = task_switch_16(ctxt, ops, tss_selector, old_tss_sel,
+ ret = task_switch_16(ctxt, tss_selector, old_tss_sel,
old_tss_base, &next_tss_desc);
if (ret != X86EMUL_CONTINUE)
return ret;
if (reason != TASK_SWITCH_IRET) {
next_tss_desc.type |= (1 << 1); /* set busy flag */
- write_segment_descriptor(ctxt, ops, tss_selector,
- &next_tss_desc);
+ write_segment_descriptor(ctxt, tss_selector, &next_tss_desc);
}
ops->set_cr(ctxt, 0, ops->get_cr(ctxt, 0) | X86_CR0_TS);
ops->set_segment(ctxt, tss_selector, &next_tss_desc, 0, VCPU_SREG_TR);
if (has_error_code) {
- struct decode_cache *c = &ctxt->decode;
-
- c->op_bytes = c->ad_bytes = (next_tss_desc.type & 8) ? 4 : 2;
- c->lock_prefix = 0;
- c->src.val = (unsigned long) error_code;
+ ctxt->op_bytes = ctxt->ad_bytes = (next_tss_desc.type & 8) ? 4 : 2;
+ ctxt->lock_prefix = 0;
+ ctxt->src.val = (unsigned long) error_code;
ret = em_push(ctxt);
}
u16 tss_selector, int reason,
bool has_error_code, u32 error_code)
{
- struct x86_emulate_ops *ops = ctxt->ops;
- struct decode_cache *c = &ctxt->decode;
int rc;
- c->eip = ctxt->eip;
- c->dst.type = OP_NONE;
+ ctxt->_eip = ctxt->eip;
+ ctxt->dst.type = OP_NONE;
- rc = emulator_do_task_switch(ctxt, ops, tss_selector, reason,
+ rc = emulator_do_task_switch(ctxt, tss_selector, reason,
has_error_code, error_code);
if (rc == X86EMUL_CONTINUE)
- ctxt->eip = c->eip;
+ ctxt->eip = ctxt->_eip;
return (rc == X86EMUL_UNHANDLEABLE) ? EMULATION_FAILED : EMULATION_OK;
}
static void string_addr_inc(struct x86_emulate_ctxt *ctxt, unsigned seg,
int reg, struct operand *op)
{
- struct decode_cache *c = &ctxt->decode;
int df = (ctxt->eflags & EFLG_DF) ? -1 : 1;
- register_address_increment(c, &c->regs[reg], df * op->bytes);
- op->addr.mem.ea = register_address(c, c->regs[reg]);
+ register_address_increment(ctxt, &ctxt->regs[reg], df * op->bytes);
+ op->addr.mem.ea = register_address(ctxt, ctxt->regs[reg]);
op->addr.mem.seg = seg;
}
static int em_das(struct x86_emulate_ctxt *ctxt)
{
- struct decode_cache *c = &ctxt->decode;
u8 al, old_al;
bool af, cf, old_cf;
cf = ctxt->eflags & X86_EFLAGS_CF;
- al = c->dst.val;
+ al = ctxt->dst.val;
old_al = al;
old_cf = cf;
cf = true;
}
- c->dst.val = al;
+ ctxt->dst.val = al;
/* Set PF, ZF, SF */
- c->src.type = OP_IMM;
- c->src.val = 0;
- c->src.bytes = 1;
- emulate_2op_SrcV("or", c->src, c->dst, ctxt->eflags);
+ ctxt->src.type = OP_IMM;
+ ctxt->src.val = 0;
+ ctxt->src.bytes = 1;
+ emulate_2op_SrcV("or", ctxt->src, ctxt->dst, ctxt->eflags);
ctxt->eflags &= ~(X86_EFLAGS_AF | X86_EFLAGS_CF);
if (cf)
ctxt->eflags |= X86_EFLAGS_CF;
static int em_call_far(struct x86_emulate_ctxt *ctxt)
{
- struct decode_cache *c = &ctxt->decode;
u16 sel, old_cs;
ulong old_eip;
int rc;
old_cs = get_segment_selector(ctxt, VCPU_SREG_CS);
- old_eip = c->eip;
+ old_eip = ctxt->_eip;
- memcpy(&sel, c->src.valptr + c->op_bytes, 2);
- if (load_segment_descriptor(ctxt, ctxt->ops, sel, VCPU_SREG_CS))
+ memcpy(&sel, ctxt->src.valptr + ctxt->op_bytes, 2);
+ if (load_segment_descriptor(ctxt, sel, VCPU_SREG_CS))
return X86EMUL_CONTINUE;
- c->eip = 0;
- memcpy(&c->eip, c->src.valptr, c->op_bytes);
+ ctxt->_eip = 0;
+ memcpy(&ctxt->_eip, ctxt->src.valptr, ctxt->op_bytes);
- c->src.val = old_cs;
+ ctxt->src.val = old_cs;
rc = em_push(ctxt);
if (rc != X86EMUL_CONTINUE)
return rc;
- c->src.val = old_eip;
+ ctxt->src.val = old_eip;
return em_push(ctxt);
}
static int em_ret_near_imm(struct x86_emulate_ctxt *ctxt)
{
- struct decode_cache *c = &ctxt->decode;
int rc;
- c->dst.type = OP_REG;
- c->dst.addr.reg = &c->eip;
- c->dst.bytes = c->op_bytes;
- rc = emulate_pop(ctxt, &c->dst.val, c->op_bytes);
+ ctxt->dst.type = OP_REG;
+ ctxt->dst.addr.reg = &ctxt->_eip;
+ ctxt->dst.bytes = ctxt->op_bytes;
+ rc = emulate_pop(ctxt, &ctxt->dst.val, ctxt->op_bytes);
if (rc != X86EMUL_CONTINUE)
return rc;
- register_address_increment(c, &c->regs[VCPU_REGS_RSP], c->src.val);
+ register_address_increment(ctxt, &ctxt->regs[VCPU_REGS_RSP], ctxt->src.val);
return X86EMUL_CONTINUE;
}
static int em_add(struct x86_emulate_ctxt *ctxt)
{
- struct decode_cache *c = &ctxt->decode;
-
- emulate_2op_SrcV("add", c->src, c->dst, ctxt->eflags);
+ emulate_2op_SrcV("add", ctxt->src, ctxt->dst, ctxt->eflags);
return X86EMUL_CONTINUE;
}
static int em_or(struct x86_emulate_ctxt *ctxt)
{
- struct decode_cache *c = &ctxt->decode;
-
- emulate_2op_SrcV("or", c->src, c->dst, ctxt->eflags);
+ emulate_2op_SrcV("or", ctxt->src, ctxt->dst, ctxt->eflags);
return X86EMUL_CONTINUE;
}
static int em_adc(struct x86_emulate_ctxt *ctxt)
{
- struct decode_cache *c = &ctxt->decode;
-
- emulate_2op_SrcV("adc", c->src, c->dst, ctxt->eflags);
+ emulate_2op_SrcV("adc", ctxt->src, ctxt->dst, ctxt->eflags);
return X86EMUL_CONTINUE;
}
static int em_sbb(struct x86_emulate_ctxt *ctxt)
{
- struct decode_cache *c = &ctxt->decode;
-
- emulate_2op_SrcV("sbb", c->src, c->dst, ctxt->eflags);
+ emulate_2op_SrcV("sbb", ctxt->src, ctxt->dst, ctxt->eflags);
return X86EMUL_CONTINUE;
}
static int em_and(struct x86_emulate_ctxt *ctxt)
{
- struct decode_cache *c = &ctxt->decode;
-
- emulate_2op_SrcV("and", c->src, c->dst, ctxt->eflags);
+ emulate_2op_SrcV("and", ctxt->src, ctxt->dst, ctxt->eflags);
return X86EMUL_CONTINUE;
}
static int em_sub(struct x86_emulate_ctxt *ctxt)
{
- struct decode_cache *c = &ctxt->decode;
-
- emulate_2op_SrcV("sub", c->src, c->dst, ctxt->eflags);
+ emulate_2op_SrcV("sub", ctxt->src, ctxt->dst, ctxt->eflags);
return X86EMUL_CONTINUE;
}
static int em_xor(struct x86_emulate_ctxt *ctxt)
{
- struct decode_cache *c = &ctxt->decode;
-
- emulate_2op_SrcV("xor", c->src, c->dst, ctxt->eflags);
+ emulate_2op_SrcV("xor", ctxt->src, ctxt->dst, ctxt->eflags);
return X86EMUL_CONTINUE;
}
static int em_cmp(struct x86_emulate_ctxt *ctxt)
{
- struct decode_cache *c = &ctxt->decode;
-
- emulate_2op_SrcV("cmp", c->src, c->dst, ctxt->eflags);
+ emulate_2op_SrcV("cmp", ctxt->src, ctxt->dst, ctxt->eflags);
/* Disable writeback. */
- c->dst.type = OP_NONE;
+ ctxt->dst.type = OP_NONE;
return X86EMUL_CONTINUE;
}
-static int em_imul(struct x86_emulate_ctxt *ctxt)
+static int em_test(struct x86_emulate_ctxt *ctxt)
+{
+ emulate_2op_SrcV("test", ctxt->src, ctxt->dst, ctxt->eflags);
+ return X86EMUL_CONTINUE;
+}
+
+static int em_xchg(struct x86_emulate_ctxt *ctxt)
{
- struct decode_cache *c = &ctxt->decode;
+ /* Write back the register source. */
+ ctxt->src.val = ctxt->dst.val;
+ write_register_operand(&ctxt->src);
- emulate_2op_SrcV_nobyte("imul", c->src, c->dst, ctxt->eflags);
+ /* Write back the memory destination with implicit LOCK prefix. */
+ ctxt->dst.val = ctxt->src.orig_val;
+ ctxt->lock_prefix = 1;
return X86EMUL_CONTINUE;
}
-static int em_imul_3op(struct x86_emulate_ctxt *ctxt)
+static int em_imul(struct x86_emulate_ctxt *ctxt)
{
- struct decode_cache *c = &ctxt->decode;
+ emulate_2op_SrcV_nobyte("imul", ctxt->src, ctxt->dst, ctxt->eflags);
+ return X86EMUL_CONTINUE;
+}
- c->dst.val = c->src2.val;
+static int em_imul_3op(struct x86_emulate_ctxt *ctxt)
+{
+ ctxt->dst.val = ctxt->src2.val;
return em_imul(ctxt);
}
static int em_cwd(struct x86_emulate_ctxt *ctxt)
{
- struct decode_cache *c = &ctxt->decode;
-
- c->dst.type = OP_REG;
- c->dst.bytes = c->src.bytes;
- c->dst.addr.reg = &c->regs[VCPU_REGS_RDX];
- c->dst.val = ~((c->src.val >> (c->src.bytes * 8 - 1)) - 1);
+ ctxt->dst.type = OP_REG;
+ ctxt->dst.bytes = ctxt->src.bytes;
+ ctxt->dst.addr.reg = &ctxt->regs[VCPU_REGS_RDX];
+ ctxt->dst.val = ~((ctxt->src.val >> (ctxt->src.bytes * 8 - 1)) - 1);
return X86EMUL_CONTINUE;
}
static int em_rdtsc(struct x86_emulate_ctxt *ctxt)
{
- struct decode_cache *c = &ctxt->decode;
u64 tsc = 0;
ctxt->ops->get_msr(ctxt, MSR_IA32_TSC, &tsc);
- c->regs[VCPU_REGS_RAX] = (u32)tsc;
- c->regs[VCPU_REGS_RDX] = tsc >> 32;
+ ctxt->regs[VCPU_REGS_RAX] = (u32)tsc;
+ ctxt->regs[VCPU_REGS_RDX] = tsc >> 32;
return X86EMUL_CONTINUE;
}
static int em_mov(struct x86_emulate_ctxt *ctxt)
{
- struct decode_cache *c = &ctxt->decode;
- c->dst.val = c->src.val;
+ ctxt->dst.val = ctxt->src.val;
return X86EMUL_CONTINUE;
}
+static int em_mov_rm_sreg(struct x86_emulate_ctxt *ctxt)
+{
+ if (ctxt->modrm_reg > VCPU_SREG_GS)
+ return emulate_ud(ctxt);
+
+ ctxt->dst.val = get_segment_selector(ctxt, ctxt->modrm_reg);
+ return X86EMUL_CONTINUE;
+}
+
+static int em_mov_sreg_rm(struct x86_emulate_ctxt *ctxt)
+{
+ u16 sel = ctxt->src.val;
+
+ if (ctxt->modrm_reg == VCPU_SREG_CS || ctxt->modrm_reg > VCPU_SREG_GS)
+ return emulate_ud(ctxt);
+
+ if (ctxt->modrm_reg == VCPU_SREG_SS)
+ ctxt->interruptibility = KVM_X86_SHADOW_INT_MOV_SS;
+
+ /* Disable writeback. */
+ ctxt->dst.type = OP_NONE;
+ return load_segment_descriptor(ctxt, sel, ctxt->modrm_reg);
+}
+
static int em_movdqu(struct x86_emulate_ctxt *ctxt)
{
- struct decode_cache *c = &ctxt->decode;
- memcpy(&c->dst.vec_val, &c->src.vec_val, c->op_bytes);
+ memcpy(&ctxt->dst.vec_val, &ctxt->src.vec_val, ctxt->op_bytes);
return X86EMUL_CONTINUE;
}
static int em_invlpg(struct x86_emulate_ctxt *ctxt)
{
- struct decode_cache *c = &ctxt->decode;
int rc;
ulong linear;
- rc = linearize(ctxt, c->src.addr.mem, 1, false, &linear);
+ rc = linearize(ctxt, ctxt->src.addr.mem, 1, false, &linear);
if (rc == X86EMUL_CONTINUE)
ctxt->ops->invlpg(ctxt, linear);
/* Disable writeback. */
- c->dst.type = OP_NONE;
+ ctxt->dst.type = OP_NONE;
return X86EMUL_CONTINUE;
}
static int em_vmcall(struct x86_emulate_ctxt *ctxt)
{
- struct decode_cache *c = &ctxt->decode;
int rc;
- if (c->modrm_mod != 3 || c->modrm_rm != 1)
+ if (ctxt->modrm_mod != 3 || ctxt->modrm_rm != 1)
return X86EMUL_UNHANDLEABLE;
rc = ctxt->ops->fix_hypercall(ctxt);
return rc;
/* Let the processor re-execute the fixed hypercall */
- c->eip = ctxt->eip;
+ ctxt->_eip = ctxt->eip;
/* Disable writeback. */
- c->dst.type = OP_NONE;
+ ctxt->dst.type = OP_NONE;
return X86EMUL_CONTINUE;
}
static int em_lgdt(struct x86_emulate_ctxt *ctxt)
{
- struct decode_cache *c = &ctxt->decode;
struct desc_ptr desc_ptr;
int rc;
- rc = read_descriptor(ctxt, c->src.addr.mem,
+ rc = read_descriptor(ctxt, ctxt->src.addr.mem,
&desc_ptr.size, &desc_ptr.address,
- c->op_bytes);
+ ctxt->op_bytes);
if (rc != X86EMUL_CONTINUE)
return rc;
ctxt->ops->set_gdt(ctxt, &desc_ptr);
/* Disable writeback. */
- c->dst.type = OP_NONE;
+ ctxt->dst.type = OP_NONE;
return X86EMUL_CONTINUE;
}
static int em_vmmcall(struct x86_emulate_ctxt *ctxt)
{
- struct decode_cache *c = &ctxt->decode;
int rc;
rc = ctxt->ops->fix_hypercall(ctxt);
/* Disable writeback. */
- c->dst.type = OP_NONE;
+ ctxt->dst.type = OP_NONE;
return rc;
}
static int em_lidt(struct x86_emulate_ctxt *ctxt)
{
- struct decode_cache *c = &ctxt->decode;
struct desc_ptr desc_ptr;
int rc;
- rc = read_descriptor(ctxt, c->src.addr.mem,
+ rc = read_descriptor(ctxt, ctxt->src.addr.mem,
&desc_ptr.size, &desc_ptr.address,
- c->op_bytes);
+ ctxt->op_bytes);
if (rc != X86EMUL_CONTINUE)
return rc;
ctxt->ops->set_idt(ctxt, &desc_ptr);
/* Disable writeback. */
- c->dst.type = OP_NONE;
+ ctxt->dst.type = OP_NONE;
return X86EMUL_CONTINUE;
}
static int em_smsw(struct x86_emulate_ctxt *ctxt)
{
- struct decode_cache *c = &ctxt->decode;
-
- c->dst.bytes = 2;
- c->dst.val = ctxt->ops->get_cr(ctxt, 0);
+ ctxt->dst.bytes = 2;
+ ctxt->dst.val = ctxt->ops->get_cr(ctxt, 0);
return X86EMUL_CONTINUE;
}
static int em_lmsw(struct x86_emulate_ctxt *ctxt)
{
- struct decode_cache *c = &ctxt->decode;
ctxt->ops->set_cr(ctxt, 0, (ctxt->ops->get_cr(ctxt, 0) & ~0x0eul)
- | (c->src.val & 0x0f));
- c->dst.type = OP_NONE;
+ | (ctxt->src.val & 0x0f));
+ ctxt->dst.type = OP_NONE;
+ return X86EMUL_CONTINUE;
+}
+
+static int em_loop(struct x86_emulate_ctxt *ctxt)
+{
+ register_address_increment(ctxt, &ctxt->regs[VCPU_REGS_RCX], -1);
+ if ((address_mask(ctxt, ctxt->regs[VCPU_REGS_RCX]) != 0) &&
+ (ctxt->b == 0xe2 || test_cc(ctxt->b ^ 0x5, ctxt->eflags)))
+ jmp_rel(ctxt, ctxt->src.val);
+
+ return X86EMUL_CONTINUE;
+}
+
+static int em_jcxz(struct x86_emulate_ctxt *ctxt)
+{
+ if (address_mask(ctxt, ctxt->regs[VCPU_REGS_RCX]) == 0)
+ jmp_rel(ctxt, ctxt->src.val);
+
+ return X86EMUL_CONTINUE;
+}
+
+static int em_cli(struct x86_emulate_ctxt *ctxt)
+{
+ if (emulator_bad_iopl(ctxt))
+ return emulate_gp(ctxt, 0);
+
+ ctxt->eflags &= ~X86_EFLAGS_IF;
+ return X86EMUL_CONTINUE;
+}
+
+static int em_sti(struct x86_emulate_ctxt *ctxt)
+{
+ if (emulator_bad_iopl(ctxt))
+ return emulate_gp(ctxt, 0);
+
+ ctxt->interruptibility = KVM_X86_SHADOW_INT_STI;
+ ctxt->eflags |= X86_EFLAGS_IF;
return X86EMUL_CONTINUE;
}
static int check_cr_read(struct x86_emulate_ctxt *ctxt)
{
- struct decode_cache *c = &ctxt->decode;
-
- if (!valid_cr(c->modrm_reg))
+ if (!valid_cr(ctxt->modrm_reg))
return emulate_ud(ctxt);
return X86EMUL_CONTINUE;
static int check_cr_write(struct x86_emulate_ctxt *ctxt)
{
- struct decode_cache *c = &ctxt->decode;
- u64 new_val = c->src.val64;
- int cr = c->modrm_reg;
+ u64 new_val = ctxt->src.val64;
+ int cr = ctxt->modrm_reg;
u64 efer = 0;
static u64 cr_reserved_bits[] = {
static int check_dr_read(struct x86_emulate_ctxt *ctxt)
{
- struct decode_cache *c = &ctxt->decode;
- int dr = c->modrm_reg;
+ int dr = ctxt->modrm_reg;
u64 cr4;
if (dr > 7)
static int check_dr_write(struct x86_emulate_ctxt *ctxt)
{
- struct decode_cache *c = &ctxt->decode;
- u64 new_val = c->src.val64;
- int dr = c->modrm_reg;
+ u64 new_val = ctxt->src.val64;
+ int dr = ctxt->modrm_reg;
if ((dr == 6 || dr == 7) && (new_val & 0xffffffff00000000ULL))
return emulate_gp(ctxt, 0);
static int check_svme_pa(struct x86_emulate_ctxt *ctxt)
{
- u64 rax = ctxt->decode.regs[VCPU_REGS_RAX];
+ u64 rax = ctxt->regs[VCPU_REGS_RAX];
/* Valid physical address? */
if (rax & 0xffff000000000000ULL)
static int check_rdpmc(struct x86_emulate_ctxt *ctxt)
{
u64 cr4 = ctxt->ops->get_cr(ctxt, 4);
- u64 rcx = ctxt->decode.regs[VCPU_REGS_RCX];
+ u64 rcx = ctxt->regs[VCPU_REGS_RCX];
if ((!(cr4 & X86_CR4_PCE) && ctxt->ops->cpl(ctxt)) ||
(rcx > 3))
static int check_perm_in(struct x86_emulate_ctxt *ctxt)
{
- struct decode_cache *c = &ctxt->decode;
-
- c->dst.bytes = min(c->dst.bytes, 4u);
- if (!emulator_io_permited(ctxt, ctxt->ops, c->src.val, c->dst.bytes))
+ ctxt->dst.bytes = min(ctxt->dst.bytes, 4u);
+ if (!emulator_io_permited(ctxt, ctxt->src.val, ctxt->dst.bytes))
return emulate_gp(ctxt, 0);
return X86EMUL_CONTINUE;
static int check_perm_out(struct x86_emulate_ctxt *ctxt)
{
- struct decode_cache *c = &ctxt->decode;
-
- c->src.bytes = min(c->src.bytes, 4u);
- if (!emulator_io_permited(ctxt, ctxt->ops, c->dst.val, c->src.bytes))
+ ctxt->src.bytes = min(ctxt->src.bytes, 4u);
+ if (!emulator_io_permited(ctxt, ctxt->dst.val, ctxt->src.bytes))
return emulate_gp(ctxt, 0);
return X86EMUL_CONTINUE;
I(DstReg | SrcMem | ModRM | Src2Imm, em_imul_3op),
I(SrcImmByte | Mov | Stack, em_push),
I(DstReg | SrcMem | ModRM | Src2ImmByte, em_imul_3op),
- D2bvIP(DstDI | Mov | String, ins, check_perm_in), /* insb, insw/insd */
- D2bvIP(SrcSI | ImplicitOps | String, outs, check_perm_out), /* outsb, outsw/outsd */
+ D2bvIP(DstDI | SrcDX | Mov | String, ins, check_perm_in), /* insb, insw/insd */
+ D2bvIP(SrcSI | DstDX | String, outs, check_perm_out), /* outsb, outsw/outsd */
/* 0x70 - 0x7F */
X16(D(SrcImmByte)),
/* 0x80 - 0x87 */
G(DstMem | SrcImm | ModRM | Group, group1),
G(ByteOp | DstMem | SrcImm | ModRM | No64 | Group, group1),
G(DstMem | SrcImmByte | ModRM | Group, group1),
- D2bv(DstMem | SrcReg | ModRM), D2bv(DstMem | SrcReg | ModRM | Lock),
+ I2bv(DstMem | SrcReg | ModRM, em_test),
+ I2bv(DstMem | SrcReg | ModRM | Lock, em_xchg),
/* 0x88 - 0x8F */
I2bv(DstMem | SrcReg | ModRM | Mov, em_mov),
I2bv(DstReg | SrcMem | ModRM | Mov, em_mov),
- D(DstMem | SrcNone | ModRM | Mov), D(ModRM | SrcMem | NoAccess | DstReg),
- D(ImplicitOps | SrcMem16 | ModRM), G(0, group1A),
+ I(DstMem | SrcNone | ModRM | Mov, em_mov_rm_sreg),
+ D(ModRM | SrcMem | NoAccess | DstReg),
+ I(ImplicitOps | SrcMem16 | ModRM, em_mov_sreg_rm),
+ G(0, group1A),
/* 0x90 - 0x97 */
DI(SrcAcc | DstReg, pause), X7(D(SrcAcc | DstReg)),
/* 0x98 - 0x9F */
I2bv(SrcSI | DstDI | Mov | String, em_mov),
I2bv(SrcSI | DstDI | String, em_cmp),
/* 0xA8 - 0xAF */
- D2bv(DstAcc | SrcImm),
+ I2bv(DstAcc | SrcImm, em_test),
I2bv(SrcAcc | DstDI | Mov | String, em_mov),
I2bv(SrcSI | DstAcc | Mov | String, em_mov),
I2bv(SrcAcc | DstDI | String, em_cmp),
/* 0xC0 - 0xC7 */
D2bv(DstMem | SrcImmByte | ModRM),
I(ImplicitOps | Stack | SrcImmU16, em_ret_near_imm),
- D(ImplicitOps | Stack),
+ I(ImplicitOps | Stack, em_ret),
D(DstReg | SrcMemFAddr | ModRM | No64), D(DstReg | SrcMemFAddr | ModRM | No64),
G(ByteOp, group11), G(0, group11),
/* 0xC8 - 0xCF */
- N, N, N, D(ImplicitOps | Stack),
+ N, N, N, I(ImplicitOps | Stack, em_ret_far),
D(ImplicitOps), DI(SrcImmByte, intn),
- D(ImplicitOps | No64), DI(ImplicitOps, iret),
+ D(ImplicitOps | No64), II(ImplicitOps, em_iret, iret),
/* 0xD0 - 0xD7 */
D2bv(DstMem | SrcOne | ModRM), D2bv(DstMem | ModRM),
N, N, N, N,
/* 0xD8 - 0xDF */
N, N, N, N, N, N, N, N,
/* 0xE0 - 0xE7 */
- X4(D(SrcImmByte)),
+ X3(I(SrcImmByte, em_loop)),
+ I(SrcImmByte, em_jcxz),
D2bvIP(SrcImmUByte | DstAcc, in, check_perm_in),
D2bvIP(SrcAcc | DstImmUByte, out, check_perm_out),
/* 0xE8 - 0xEF */
D(SrcImm | Stack), D(SrcImm | ImplicitOps),
- D(SrcImmFAddr | No64), D(SrcImmByte | ImplicitOps),
- D2bvIP(SrcNone | DstAcc, in, check_perm_in),
- D2bvIP(SrcAcc | ImplicitOps, out, check_perm_out),
+ I(SrcImmFAddr | No64, em_jmp_far), D(SrcImmByte | ImplicitOps),
+ D2bvIP(SrcDX | DstAcc, in, check_perm_in),
+ D2bvIP(SrcAcc | DstDX, out, check_perm_out),
/* 0xF0 - 0xF7 */
N, DI(ImplicitOps, icebp), N, N,
DI(ImplicitOps | Priv, hlt), D(ImplicitOps),
G(ByteOp, group3), G(0, group3),
/* 0xF8 - 0xFF */
- D(ImplicitOps), D(ImplicitOps), D(ImplicitOps), D(ImplicitOps),
+ D(ImplicitOps), D(ImplicitOps),
+ I(ImplicitOps, em_cli), I(ImplicitOps, em_sti),
D(ImplicitOps), D(ImplicitOps), G(0, group4), G(0, group5),
};
static struct opcode twobyte_table[256] = {
/* 0x00 - 0x0F */
G(0, group6), GD(0, &group7), N, N,
- N, D(ImplicitOps | VendorSpecific), DI(ImplicitOps | Priv, clts), N,
+ N, I(ImplicitOps | VendorSpecific, em_syscall),
+ II(ImplicitOps | Priv, em_clts, clts), N,
DI(ImplicitOps | Priv, invd), DI(ImplicitOps | Priv, wbinvd), N, N,
N, D(ImplicitOps | ModRM), N, N,
/* 0x10 - 0x1F */
IIP(ImplicitOps, em_rdtsc, rdtsc, check_rdtsc),
DI(ImplicitOps | Priv, rdmsr),
DIP(ImplicitOps | Priv, rdpmc, check_rdpmc),
- D(ImplicitOps | VendorSpecific), D(ImplicitOps | Priv | VendorSpecific),
+ I(ImplicitOps | VendorSpecific, em_sysenter),
+ I(ImplicitOps | Priv | VendorSpecific, em_sysexit),
N, N,
N, N, N, N, N, N, N, N,
/* 0x40 - 0x4F */
#undef I2bv
#undef I6ALU
-static unsigned imm_size(struct decode_cache *c)
+static unsigned imm_size(struct x86_emulate_ctxt *ctxt)
{
unsigned size;
- size = (c->d & ByteOp) ? 1 : c->op_bytes;
+ size = (ctxt->d & ByteOp) ? 1 : ctxt->op_bytes;
if (size == 8)
size = 4;
return size;
static int decode_imm(struct x86_emulate_ctxt *ctxt, struct operand *op,
unsigned size, bool sign_extension)
{
- struct decode_cache *c = &ctxt->decode;
- struct x86_emulate_ops *ops = ctxt->ops;
int rc = X86EMUL_CONTINUE;
op->type = OP_IMM;
op->bytes = size;
- op->addr.mem.ea = c->eip;
+ op->addr.mem.ea = ctxt->_eip;
/* NB. Immediates are sign-extended as necessary. */
switch (op->bytes) {
case 1:
- op->val = insn_fetch(s8, 1, c->eip);
+ op->val = insn_fetch(s8, 1, ctxt->_eip);
break;
case 2:
- op->val = insn_fetch(s16, 2, c->eip);
+ op->val = insn_fetch(s16, 2, ctxt->_eip);
break;
case 4:
- op->val = insn_fetch(s32, 4, c->eip);
+ op->val = insn_fetch(s32, 4, ctxt->_eip);
break;
}
if (!sign_extension) {
return rc;
}
-int
-x86_decode_insn(struct x86_emulate_ctxt *ctxt, void *insn, int insn_len)
+int x86_decode_insn(struct x86_emulate_ctxt *ctxt, void *insn, int insn_len)
{
- struct x86_emulate_ops *ops = ctxt->ops;
- struct decode_cache *c = &ctxt->decode;
int rc = X86EMUL_CONTINUE;
int mode = ctxt->mode;
int def_op_bytes, def_ad_bytes, goffset, simd_prefix;
bool op_prefix = false;
struct opcode opcode;
- struct operand memop = { .type = OP_NONE };
+ struct operand memop = { .type = OP_NONE }, *memopp = NULL;
- c->eip = ctxt->eip;
- c->fetch.start = c->eip;
- c->fetch.end = c->fetch.start + insn_len;
+ ctxt->_eip = ctxt->eip;
+ ctxt->fetch.start = ctxt->_eip;
+ ctxt->fetch.end = ctxt->fetch.start + insn_len;
if (insn_len > 0)
- memcpy(c->fetch.data, insn, insn_len);
+ memcpy(ctxt->fetch.data, insn, insn_len);
switch (mode) {
case X86EMUL_MODE_REAL:
return -1;
}
- c->op_bytes = def_op_bytes;
- c->ad_bytes = def_ad_bytes;
+ ctxt->op_bytes = def_op_bytes;
+ ctxt->ad_bytes = def_ad_bytes;
/* Legacy prefixes. */
for (;;) {
- switch (c->b = insn_fetch(u8, 1, c->eip)) {
+ switch (ctxt->b = insn_fetch(u8, 1, ctxt->_eip)) {
case 0x66: /* operand-size override */
op_prefix = true;
/* switch between 2/4 bytes */
- c->op_bytes = def_op_bytes ^ 6;
+ ctxt->op_bytes = def_op_bytes ^ 6;
break;
case 0x67: /* address-size override */
if (mode == X86EMUL_MODE_PROT64)
/* switch between 4/8 bytes */
- c->ad_bytes = def_ad_bytes ^ 12;
+ ctxt->ad_bytes = def_ad_bytes ^ 12;
else
/* switch between 2/4 bytes */
- c->ad_bytes = def_ad_bytes ^ 6;
+ ctxt->ad_bytes = def_ad_bytes ^ 6;
break;
case 0x26: /* ES override */
case 0x2e: /* CS override */
case 0x36: /* SS override */
case 0x3e: /* DS override */
- set_seg_override(c, (c->b >> 3) & 3);
+ set_seg_override(ctxt, (ctxt->b >> 3) & 3);
break;
case 0x64: /* FS override */
case 0x65: /* GS override */
- set_seg_override(c, c->b & 7);
+ set_seg_override(ctxt, ctxt->b & 7);
break;
case 0x40 ... 0x4f: /* REX */
if (mode != X86EMUL_MODE_PROT64)
goto done_prefixes;
- c->rex_prefix = c->b;
+ ctxt->rex_prefix = ctxt->b;
continue;
case 0xf0: /* LOCK */
- c->lock_prefix = 1;
+ ctxt->lock_prefix = 1;
break;
case 0xf2: /* REPNE/REPNZ */
case 0xf3: /* REP/REPE/REPZ */
- c->rep_prefix = c->b;
+ ctxt->rep_prefix = ctxt->b;
break;
default:
goto done_prefixes;
/* Any legacy prefix after a REX prefix nullifies its effect. */
- c->rex_prefix = 0;
+ ctxt->rex_prefix = 0;
}
done_prefixes:
/* REX prefix. */
- if (c->rex_prefix & 8)
- c->op_bytes = 8; /* REX.W */
+ if (ctxt->rex_prefix & 8)
+ ctxt->op_bytes = 8; /* REX.W */
/* Opcode byte(s). */
- opcode = opcode_table[c->b];
+ opcode = opcode_table[ctxt->b];
/* Two-byte opcode? */
- if (c->b == 0x0f) {
- c->twobyte = 1;
- c->b = insn_fetch(u8, 1, c->eip);
- opcode = twobyte_table[c->b];
+ if (ctxt->b == 0x0f) {
+ ctxt->twobyte = 1;
+ ctxt->b = insn_fetch(u8, 1, ctxt->_eip);
+ opcode = twobyte_table[ctxt->b];
}
- c->d = opcode.flags;
+ ctxt->d = opcode.flags;
- while (c->d & GroupMask) {
- switch (c->d & GroupMask) {
+ while (ctxt->d & GroupMask) {
+ switch (ctxt->d & GroupMask) {
case Group:
- c->modrm = insn_fetch(u8, 1, c->eip);
- --c->eip;
- goffset = (c->modrm >> 3) & 7;
+ ctxt->modrm = insn_fetch(u8, 1, ctxt->_eip);
+ --ctxt->_eip;
+ goffset = (ctxt->modrm >> 3) & 7;
opcode = opcode.u.group[goffset];
break;
case GroupDual:
- c->modrm = insn_fetch(u8, 1, c->eip);
- --c->eip;
- goffset = (c->modrm >> 3) & 7;
- if ((c->modrm >> 6) == 3)
+ ctxt->modrm = insn_fetch(u8, 1, ctxt->_eip);
+ --ctxt->_eip;
+ goffset = (ctxt->modrm >> 3) & 7;
+ if ((ctxt->modrm >> 6) == 3)
opcode = opcode.u.gdual->mod3[goffset];
else
opcode = opcode.u.gdual->mod012[goffset];
break;
case RMExt:
- goffset = c->modrm & 7;
+ goffset = ctxt->modrm & 7;
opcode = opcode.u.group[goffset];
break;
case Prefix:
- if (c->rep_prefix && op_prefix)
+ if (ctxt->rep_prefix && op_prefix)
return X86EMUL_UNHANDLEABLE;
- simd_prefix = op_prefix ? 0x66 : c->rep_prefix;
+ simd_prefix = op_prefix ? 0x66 : ctxt->rep_prefix;
switch (simd_prefix) {
case 0x00: opcode = opcode.u.gprefix->pfx_no; break;
case 0x66: opcode = opcode.u.gprefix->pfx_66; break;
return X86EMUL_UNHANDLEABLE;
}
- c->d &= ~GroupMask;
- c->d |= opcode.flags;
+ ctxt->d &= ~GroupMask;
+ ctxt->d |= opcode.flags;
}
- c->execute = opcode.u.execute;
- c->check_perm = opcode.check_perm;
- c->intercept = opcode.intercept;
+ ctxt->execute = opcode.u.execute;
+ ctxt->check_perm = opcode.check_perm;
+ ctxt->intercept = opcode.intercept;
/* Unrecognised? */
- if (c->d == 0 || (c->d & Undefined))
+ if (ctxt->d == 0 || (ctxt->d & Undefined))
return -1;
- if (!(c->d & VendorSpecific) && ctxt->only_vendor_specific_insn)
+ if (!(ctxt->d & VendorSpecific) && ctxt->only_vendor_specific_insn)
return -1;
- if (mode == X86EMUL_MODE_PROT64 && (c->d & Stack))
- c->op_bytes = 8;
+ if (mode == X86EMUL_MODE_PROT64 && (ctxt->d & Stack))
+ ctxt->op_bytes = 8;
- if (c->d & Op3264) {
+ if (ctxt->d & Op3264) {
if (mode == X86EMUL_MODE_PROT64)
- c->op_bytes = 8;
+ ctxt->op_bytes = 8;
else
- c->op_bytes = 4;
+ ctxt->op_bytes = 4;
}
- if (c->d & Sse)
- c->op_bytes = 16;
+ if (ctxt->d & Sse)
+ ctxt->op_bytes = 16;
/* ModRM and SIB bytes. */
- if (c->d & ModRM) {
- rc = decode_modrm(ctxt, ops, &memop);
- if (!c->has_seg_override)
- set_seg_override(c, c->modrm_seg);
- } else if (c->d & MemAbs)
- rc = decode_abs(ctxt, ops, &memop);
+ if (ctxt->d & ModRM) {
+ rc = decode_modrm(ctxt, &memop);
+ if (!ctxt->has_seg_override)
+ set_seg_override(ctxt, ctxt->modrm_seg);
+ } else if (ctxt->d & MemAbs)
+ rc = decode_abs(ctxt, &memop);
if (rc != X86EMUL_CONTINUE)
goto done;
- if (!c->has_seg_override)
- set_seg_override(c, VCPU_SREG_DS);
+ if (!ctxt->has_seg_override)
+ set_seg_override(ctxt, VCPU_SREG_DS);
- memop.addr.mem.seg = seg_override(ctxt, c);
+ memop.addr.mem.seg = seg_override(ctxt);
- if (memop.type == OP_MEM && c->ad_bytes != 8)
+ if (memop.type == OP_MEM && ctxt->ad_bytes != 8)
memop.addr.mem.ea = (u32)memop.addr.mem.ea;
- if (memop.type == OP_MEM && c->rip_relative)
- memop.addr.mem.ea += c->eip;
-
/*
* Decode and fetch the source operand: register, memory
* or immediate.
*/
- switch (c->d & SrcMask) {
+ switch (ctxt->d & SrcMask) {
case SrcNone:
break;
case SrcReg:
- decode_register_operand(ctxt, &c->src, c, 0);
+ decode_register_operand(ctxt, &ctxt->src, 0);
break;
case SrcMem16:
memop.bytes = 2;
memop.bytes = 4;
goto srcmem_common;
case SrcMem:
- memop.bytes = (c->d & ByteOp) ? 1 :
- c->op_bytes;
+ memop.bytes = (ctxt->d & ByteOp) ? 1 :
+ ctxt->op_bytes;
srcmem_common:
- c->src = memop;
+ ctxt->src = memop;
+ memopp = &ctxt->src;
break;
case SrcImmU16:
- rc = decode_imm(ctxt, &c->src, 2, false);
+ rc = decode_imm(ctxt, &ctxt->src, 2, false);
break;
case SrcImm:
- rc = decode_imm(ctxt, &c->src, imm_size(c), true);
+ rc = decode_imm(ctxt, &ctxt->src, imm_size(ctxt), true);
break;
case SrcImmU:
- rc = decode_imm(ctxt, &c->src, imm_size(c), false);
+ rc = decode_imm(ctxt, &ctxt->src, imm_size(ctxt), false);
break;
case SrcImmByte:
- rc = decode_imm(ctxt, &c->src, 1, true);
+ rc = decode_imm(ctxt, &ctxt->src, 1, true);
break;
case SrcImmUByte:
- rc = decode_imm(ctxt, &c->src, 1, false);
+ rc = decode_imm(ctxt, &ctxt->src, 1, false);
break;
case SrcAcc:
- c->src.type = OP_REG;
- c->src.bytes = (c->d & ByteOp) ? 1 : c->op_bytes;
- c->src.addr.reg = &c->regs[VCPU_REGS_RAX];
- fetch_register_operand(&c->src);
+ ctxt->src.type = OP_REG;
+ ctxt->src.bytes = (ctxt->d & ByteOp) ? 1 : ctxt->op_bytes;
+ ctxt->src.addr.reg = &ctxt->regs[VCPU_REGS_RAX];
+ fetch_register_operand(&ctxt->src);
break;
case SrcOne:
- c->src.bytes = 1;
- c->src.val = 1;
+ ctxt->src.bytes = 1;
+ ctxt->src.val = 1;
break;
case SrcSI:
- c->src.type = OP_MEM;
- c->src.bytes = (c->d & ByteOp) ? 1 : c->op_bytes;
- c->src.addr.mem.ea =
- register_address(c, c->regs[VCPU_REGS_RSI]);
- c->src.addr.mem.seg = seg_override(ctxt, c);
- c->src.val = 0;
+ ctxt->src.type = OP_MEM;
+ ctxt->src.bytes = (ctxt->d & ByteOp) ? 1 : ctxt->op_bytes;
+ ctxt->src.addr.mem.ea =
+ register_address(ctxt, ctxt->regs[VCPU_REGS_RSI]);
+ ctxt->src.addr.mem.seg = seg_override(ctxt);
+ ctxt->src.val = 0;
break;
case SrcImmFAddr:
- c->src.type = OP_IMM;
- c->src.addr.mem.ea = c->eip;
- c->src.bytes = c->op_bytes + 2;
- insn_fetch_arr(c->src.valptr, c->src.bytes, c->eip);
+ ctxt->src.type = OP_IMM;
+ ctxt->src.addr.mem.ea = ctxt->_eip;
+ ctxt->src.bytes = ctxt->op_bytes + 2;
+ insn_fetch_arr(ctxt->src.valptr, ctxt->src.bytes, ctxt->_eip);
break;
case SrcMemFAddr:
- memop.bytes = c->op_bytes + 2;
+ memop.bytes = ctxt->op_bytes + 2;
goto srcmem_common;
break;
+ case SrcDX:
+ ctxt->src.type = OP_REG;
+ ctxt->src.bytes = 2;
+ ctxt->src.addr.reg = &ctxt->regs[VCPU_REGS_RDX];
+ fetch_register_operand(&ctxt->src);
+ break;
}
if (rc != X86EMUL_CONTINUE)
* Decode and fetch the second source operand: register, memory
* or immediate.
*/
- switch (c->d & Src2Mask) {
+ switch (ctxt->d & Src2Mask) {
case Src2None:
break;
case Src2CL:
- c->src2.bytes = 1;
- c->src2.val = c->regs[VCPU_REGS_RCX] & 0x8;
+ ctxt->src2.bytes = 1;
+ ctxt->src2.val = ctxt->regs[VCPU_REGS_RCX] & 0x8;
break;
case Src2ImmByte:
- rc = decode_imm(ctxt, &c->src2, 1, true);
+ rc = decode_imm(ctxt, &ctxt->src2, 1, true);
break;
case Src2One:
- c->src2.bytes = 1;
- c->src2.val = 1;
+ ctxt->src2.bytes = 1;
+ ctxt->src2.val = 1;
break;
case Src2Imm:
- rc = decode_imm(ctxt, &c->src2, imm_size(c), true);
+ rc = decode_imm(ctxt, &ctxt->src2, imm_size(ctxt), true);
break;
}
goto done;
/* Decode and fetch the destination operand: register or memory. */
- switch (c->d & DstMask) {
+ switch (ctxt->d & DstMask) {
case DstReg:
- decode_register_operand(ctxt, &c->dst, c,
- c->twobyte && (c->b == 0xb6 || c->b == 0xb7));
+ decode_register_operand(ctxt, &ctxt->dst,
+ ctxt->twobyte && (ctxt->b == 0xb6 || ctxt->b == 0xb7));
break;
case DstImmUByte:
- c->dst.type = OP_IMM;
- c->dst.addr.mem.ea = c->eip;
- c->dst.bytes = 1;
- c->dst.val = insn_fetch(u8, 1, c->eip);
+ ctxt->dst.type = OP_IMM;
+ ctxt->dst.addr.mem.ea = ctxt->_eip;
+ ctxt->dst.bytes = 1;
+ ctxt->dst.val = insn_fetch(u8, 1, ctxt->_eip);
break;
case DstMem:
case DstMem64:
- c->dst = memop;
- if ((c->d & DstMask) == DstMem64)
- c->dst.bytes = 8;
+ ctxt->dst = memop;
+ memopp = &ctxt->dst;
+ if ((ctxt->d & DstMask) == DstMem64)
+ ctxt->dst.bytes = 8;
else
- c->dst.bytes = (c->d & ByteOp) ? 1 : c->op_bytes;
- if (c->d & BitOp)
- fetch_bit_operand(c);
- c->dst.orig_val = c->dst.val;
+ ctxt->dst.bytes = (ctxt->d & ByteOp) ? 1 : ctxt->op_bytes;
+ if (ctxt->d & BitOp)
+ fetch_bit_operand(ctxt);
+ ctxt->dst.orig_val = ctxt->dst.val;
break;
case DstAcc:
- c->dst.type = OP_REG;
- c->dst.bytes = (c->d & ByteOp) ? 1 : c->op_bytes;
- c->dst.addr.reg = &c->regs[VCPU_REGS_RAX];
- fetch_register_operand(&c->dst);
- c->dst.orig_val = c->dst.val;
+ ctxt->dst.type = OP_REG;
+ ctxt->dst.bytes = (ctxt->d & ByteOp) ? 1 : ctxt->op_bytes;
+ ctxt->dst.addr.reg = &ctxt->regs[VCPU_REGS_RAX];
+ fetch_register_operand(&ctxt->dst);
+ ctxt->dst.orig_val = ctxt->dst.val;
break;
case DstDI:
- c->dst.type = OP_MEM;
- c->dst.bytes = (c->d & ByteOp) ? 1 : c->op_bytes;
- c->dst.addr.mem.ea =
- register_address(c, c->regs[VCPU_REGS_RDI]);
- c->dst.addr.mem.seg = VCPU_SREG_ES;
- c->dst.val = 0;
+ ctxt->dst.type = OP_MEM;
+ ctxt->dst.bytes = (ctxt->d & ByteOp) ? 1 : ctxt->op_bytes;
+ ctxt->dst.addr.mem.ea =
+ register_address(ctxt, ctxt->regs[VCPU_REGS_RDI]);
+ ctxt->dst.addr.mem.seg = VCPU_SREG_ES;
+ ctxt->dst.val = 0;
+ break;
+ case DstDX:
+ ctxt->dst.type = OP_REG;
+ ctxt->dst.bytes = 2;
+ ctxt->dst.addr.reg = &ctxt->regs[VCPU_REGS_RDX];
+ fetch_register_operand(&ctxt->dst);
break;
case ImplicitOps:
/* Special instructions do their own operand decoding. */
default:
- c->dst.type = OP_NONE; /* Disable writeback. */
- return 0;
+ ctxt->dst.type = OP_NONE; /* Disable writeback. */
+ break;
}
done:
+ if (memopp && memopp->type == OP_MEM && ctxt->rip_relative)
+ memopp->addr.mem.ea += ctxt->_eip;
+
return (rc == X86EMUL_UNHANDLEABLE) ? EMULATION_FAILED : EMULATION_OK;
}
static bool string_insn_completed(struct x86_emulate_ctxt *ctxt)
{
- struct decode_cache *c = &ctxt->decode;
-
/* The second termination condition only applies for REPE
* and REPNE. Test if the repeat string operation prefix is
* REPE/REPZ or REPNE/REPNZ and if it's the case it tests the
* - if REPE/REPZ and ZF = 0 then done
* - if REPNE/REPNZ and ZF = 1 then done
*/
- if (((c->b == 0xa6) || (c->b == 0xa7) ||
- (c->b == 0xae) || (c->b == 0xaf))
- && (((c->rep_prefix == REPE_PREFIX) &&
+ if (((ctxt->b == 0xa6) || (ctxt->b == 0xa7) ||
+ (ctxt->b == 0xae) || (ctxt->b == 0xaf))
+ && (((ctxt->rep_prefix == REPE_PREFIX) &&
((ctxt->eflags & EFLG_ZF) == 0))
- || ((c->rep_prefix == REPNE_PREFIX) &&
+ || ((ctxt->rep_prefix == REPNE_PREFIX) &&
((ctxt->eflags & EFLG_ZF) == EFLG_ZF))))
return true;
return false;
}
-int
-x86_emulate_insn(struct x86_emulate_ctxt *ctxt)
+int x86_emulate_insn(struct x86_emulate_ctxt *ctxt)
{
struct x86_emulate_ops *ops = ctxt->ops;
u64 msr_data;
- struct decode_cache *c = &ctxt->decode;
int rc = X86EMUL_CONTINUE;
- int saved_dst_type = c->dst.type;
- int irq; /* Used for int 3, int, and into */
+ int saved_dst_type = ctxt->dst.type;
- ctxt->decode.mem_read.pos = 0;
+ ctxt->mem_read.pos = 0;
- if (ctxt->mode == X86EMUL_MODE_PROT64 && (c->d & No64)) {
+ if (ctxt->mode == X86EMUL_MODE_PROT64 && (ctxt->d & No64)) {
rc = emulate_ud(ctxt);
goto done;
}
/* LOCK prefix is allowed only with some instructions */
- if (c->lock_prefix && (!(c->d & Lock) || c->dst.type != OP_MEM)) {
+ if (ctxt->lock_prefix && (!(ctxt->d & Lock) || ctxt->dst.type != OP_MEM)) {
rc = emulate_ud(ctxt);
goto done;
}
- if ((c->d & SrcMask) == SrcMemFAddr && c->src.type != OP_MEM) {
+ if ((ctxt->d & SrcMask) == SrcMemFAddr && ctxt->src.type != OP_MEM) {
rc = emulate_ud(ctxt);
goto done;
}
- if ((c->d & Sse)
+ if ((ctxt->d & Sse)
&& ((ops->get_cr(ctxt, 0) & X86_CR0_EM)
|| !(ops->get_cr(ctxt, 4) & X86_CR4_OSFXSR))) {
rc = emulate_ud(ctxt);
goto done;
}
- if ((c->d & Sse) && (ops->get_cr(ctxt, 0) & X86_CR0_TS)) {
+ if ((ctxt->d & Sse) && (ops->get_cr(ctxt, 0) & X86_CR0_TS)) {
rc = emulate_nm(ctxt);
goto done;
}
- if (unlikely(ctxt->guest_mode) && c->intercept) {
- rc = emulator_check_intercept(ctxt, c->intercept,
+ if (unlikely(ctxt->guest_mode) && ctxt->intercept) {
+ rc = emulator_check_intercept(ctxt, ctxt->intercept,
X86_ICPT_PRE_EXCEPT);
if (rc != X86EMUL_CONTINUE)
goto done;
}
/* Privileged instruction can be executed only in CPL=0 */
- if ((c->d & Priv) && ops->cpl(ctxt)) {
+ if ((ctxt->d & Priv) && ops->cpl(ctxt)) {
rc = emulate_gp(ctxt, 0);
goto done;
}
/* Instruction can only be executed in protected mode */
- if ((c->d & Prot) && !(ctxt->mode & X86EMUL_MODE_PROT)) {
+ if ((ctxt->d & Prot) && !(ctxt->mode & X86EMUL_MODE_PROT)) {
rc = emulate_ud(ctxt);
goto done;
}
/* Do instruction specific permission checks */
- if (c->check_perm) {
- rc = c->check_perm(ctxt);
+ if (ctxt->check_perm) {
+ rc = ctxt->check_perm(ctxt);
if (rc != X86EMUL_CONTINUE)
goto done;
}
- if (unlikely(ctxt->guest_mode) && c->intercept) {
- rc = emulator_check_intercept(ctxt, c->intercept,
+ if (unlikely(ctxt->guest_mode) && ctxt->intercept) {
+ rc = emulator_check_intercept(ctxt, ctxt->intercept,
X86_ICPT_POST_EXCEPT);
if (rc != X86EMUL_CONTINUE)
goto done;
}
- if (c->rep_prefix && (c->d & String)) {
+ if (ctxt->rep_prefix && (ctxt->d & String)) {
/* All REP prefixes have the same first termination condition */
- if (address_mask(c, c->regs[VCPU_REGS_RCX]) == 0) {
- ctxt->eip = c->eip;
+ if (address_mask(ctxt, ctxt->regs[VCPU_REGS_RCX]) == 0) {
+ ctxt->eip = ctxt->_eip;
goto done;
}
}
- if ((c->src.type == OP_MEM) && !(c->d & NoAccess)) {
- rc = segmented_read(ctxt, c->src.addr.mem,
- c->src.valptr, c->src.bytes);
+ if ((ctxt->src.type == OP_MEM) && !(ctxt->d & NoAccess)) {
+ rc = segmented_read(ctxt, ctxt->src.addr.mem,
+ ctxt->src.valptr, ctxt->src.bytes);
if (rc != X86EMUL_CONTINUE)
goto done;
- c->src.orig_val64 = c->src.val64;
+ ctxt->src.orig_val64 = ctxt->src.val64;
}
- if (c->src2.type == OP_MEM) {
- rc = segmented_read(ctxt, c->src2.addr.mem,
- &c->src2.val, c->src2.bytes);
+ if (ctxt->src2.type == OP_MEM) {
+ rc = segmented_read(ctxt, ctxt->src2.addr.mem,
+ &ctxt->src2.val, ctxt->src2.bytes);
if (rc != X86EMUL_CONTINUE)
goto done;
}
- if ((c->d & DstMask) == ImplicitOps)
+ if ((ctxt->d & DstMask) == ImplicitOps)
goto special_insn;
- if ((c->dst.type == OP_MEM) && !(c->d & Mov)) {
+ if ((ctxt->dst.type == OP_MEM) && !(ctxt->d & Mov)) {
/* optimisation - avoid slow emulated read if Mov */
- rc = segmented_read(ctxt, c->dst.addr.mem,
- &c->dst.val, c->dst.bytes);
+ rc = segmented_read(ctxt, ctxt->dst.addr.mem,
+ &ctxt->dst.val, ctxt->dst.bytes);
if (rc != X86EMUL_CONTINUE)
goto done;
}
- c->dst.orig_val = c->dst.val;
+ ctxt->dst.orig_val = ctxt->dst.val;
special_insn:
- if (unlikely(ctxt->guest_mode) && c->intercept) {
- rc = emulator_check_intercept(ctxt, c->intercept,
+ if (unlikely(ctxt->guest_mode) && ctxt->intercept) {
+ rc = emulator_check_intercept(ctxt, ctxt->intercept,
X86_ICPT_POST_MEMACCESS);
if (rc != X86EMUL_CONTINUE)
goto done;
}
- if (c->execute) {
- rc = c->execute(ctxt);
+ if (ctxt->execute) {
+ rc = ctxt->execute(ctxt);
if (rc != X86EMUL_CONTINUE)
goto done;
goto writeback;
}
- if (c->twobyte)
+ if (ctxt->twobyte)
goto twobyte_insn;
- switch (c->b) {
+ switch (ctxt->b) {
case 0x06: /* push es */
- rc = emulate_push_sreg(ctxt, ops, VCPU_SREG_ES);
+ rc = emulate_push_sreg(ctxt, VCPU_SREG_ES);
break;
case 0x07: /* pop es */
- rc = emulate_pop_sreg(ctxt, ops, VCPU_SREG_ES);
+ rc = emulate_pop_sreg(ctxt, VCPU_SREG_ES);
break;
case 0x0e: /* push cs */
- rc = emulate_push_sreg(ctxt, ops, VCPU_SREG_CS);
+ rc = emulate_push_sreg(ctxt, VCPU_SREG_CS);
break;
case 0x16: /* push ss */
- rc = emulate_push_sreg(ctxt, ops, VCPU_SREG_SS);
+ rc = emulate_push_sreg(ctxt, VCPU_SREG_SS);
break;
case 0x17: /* pop ss */
- rc = emulate_pop_sreg(ctxt, ops, VCPU_SREG_SS);
+ rc = emulate_pop_sreg(ctxt, VCPU_SREG_SS);
break;
case 0x1e: /* push ds */
- rc = emulate_push_sreg(ctxt, ops, VCPU_SREG_DS);
+ rc = emulate_push_sreg(ctxt, VCPU_SREG_DS);
break;
case 0x1f: /* pop ds */
- rc = emulate_pop_sreg(ctxt, ops, VCPU_SREG_DS);
+ rc = emulate_pop_sreg(ctxt, VCPU_SREG_DS);
break;
case 0x40 ... 0x47: /* inc r16/r32 */
- emulate_1op("inc", c->dst, ctxt->eflags);
+ emulate_1op("inc", ctxt->dst, ctxt->eflags);
break;
case 0x48 ... 0x4f: /* dec r16/r32 */
- emulate_1op("dec", c->dst, ctxt->eflags);
+ emulate_1op("dec", ctxt->dst, ctxt->eflags);
break;
case 0x63: /* movsxd */
if (ctxt->mode != X86EMUL_MODE_PROT64)
goto cannot_emulate;
- c->dst.val = (s32) c->src.val;
+ ctxt->dst.val = (s32) ctxt->src.val;
break;
case 0x6c: /* insb */
case 0x6d: /* insw/insd */
- c->src.val = c->regs[VCPU_REGS_RDX];
+ ctxt->src.val = ctxt->regs[VCPU_REGS_RDX];
goto do_io_in;
case 0x6e: /* outsb */
case 0x6f: /* outsw/outsd */
- c->dst.val = c->regs[VCPU_REGS_RDX];
+ ctxt->dst.val = ctxt->regs[VCPU_REGS_RDX];
goto do_io_out;
break;
case 0x70 ... 0x7f: /* jcc (short) */
- if (test_cc(c->b, ctxt->eflags))
- jmp_rel(c, c->src.val);
- break;
- case 0x84 ... 0x85:
- test:
- emulate_2op_SrcV("test", c->src, c->dst, ctxt->eflags);
- break;
- case 0x86 ... 0x87: /* xchg */
- xchg:
- /* Write back the register source. */
- c->src.val = c->dst.val;
- write_register_operand(&c->src);
- /*
- * Write back the memory destination with implicit LOCK
- * prefix.
- */
- c->dst.val = c->src.orig_val;
- c->lock_prefix = 1;
- break;
- case 0x8c: /* mov r/m, sreg */
- if (c->modrm_reg > VCPU_SREG_GS) {
- rc = emulate_ud(ctxt);
- goto done;
- }
- c->dst.val = get_segment_selector(ctxt, c->modrm_reg);
+ if (test_cc(ctxt->b, ctxt->eflags))
+ jmp_rel(ctxt, ctxt->src.val);
break;
case 0x8d: /* lea r16/r32, m */
- c->dst.val = c->src.addr.mem.ea;
+ ctxt->dst.val = ctxt->src.addr.mem.ea;
break;
- case 0x8e: { /* mov seg, r/m16 */
- uint16_t sel;
-
- sel = c->src.val;
-
- if (c->modrm_reg == VCPU_SREG_CS ||
- c->modrm_reg > VCPU_SREG_GS) {
- rc = emulate_ud(ctxt);
- goto done;
- }
-
- if (c->modrm_reg == VCPU_SREG_SS)
- ctxt->interruptibility = KVM_X86_SHADOW_INT_MOV_SS;
-
- rc = load_segment_descriptor(ctxt, ops, sel, c->modrm_reg);
-
- c->dst.type = OP_NONE; /* Disable writeback. */
- break;
- }
case 0x8f: /* pop (sole member of Grp1a) */
rc = em_grp1a(ctxt);
break;
case 0x90 ... 0x97: /* nop / xchg reg, rax */
- if (c->dst.addr.reg == &c->regs[VCPU_REGS_RAX])
+ if (ctxt->dst.addr.reg == &ctxt->regs[VCPU_REGS_RAX])
break;
- goto xchg;
+ rc = em_xchg(ctxt);
+ break;
case 0x98: /* cbw/cwde/cdqe */
- switch (c->op_bytes) {
- case 2: c->dst.val = (s8)c->dst.val; break;
- case 4: c->dst.val = (s16)c->dst.val; break;
- case 8: c->dst.val = (s32)c->dst.val; break;
+ switch (ctxt->op_bytes) {
+ case 2: ctxt->dst.val = (s8)ctxt->dst.val; break;
+ case 4: ctxt->dst.val = (s16)ctxt->dst.val; break;
+ case 8: ctxt->dst.val = (s32)ctxt->dst.val; break;
}
break;
- case 0xa8 ... 0xa9: /* test ax, imm */
- goto test;
case 0xc0 ... 0xc1:
rc = em_grp2(ctxt);
break;
- case 0xc3: /* ret */
- c->dst.type = OP_REG;
- c->dst.addr.reg = &c->eip;
- c->dst.bytes = c->op_bytes;
- rc = em_pop(ctxt);
- break;
case 0xc4: /* les */
- rc = emulate_load_segment(ctxt, ops, VCPU_SREG_ES);
+ rc = emulate_load_segment(ctxt, VCPU_SREG_ES);
break;
case 0xc5: /* lds */
- rc = emulate_load_segment(ctxt, ops, VCPU_SREG_DS);
- break;
- case 0xcb: /* ret far */
- rc = emulate_ret_far(ctxt, ops);
+ rc = emulate_load_segment(ctxt, VCPU_SREG_DS);
break;
case 0xcc: /* int3 */
- irq = 3;
- goto do_interrupt;
+ rc = emulate_int(ctxt, 3);
+ break;
case 0xcd: /* int n */
- irq = c->src.val;
- do_interrupt:
- rc = emulate_int(ctxt, ops, irq);
+ rc = emulate_int(ctxt, ctxt->src.val);
break;
case 0xce: /* into */
- if (ctxt->eflags & EFLG_OF) {
- irq = 4;
- goto do_interrupt;
- }
- break;
- case 0xcf: /* iret */
- rc = emulate_iret(ctxt, ops);
+ if (ctxt->eflags & EFLG_OF)
+ rc = emulate_int(ctxt, 4);
break;
case 0xd0 ... 0xd1: /* Grp2 */
rc = em_grp2(ctxt);
break;
case 0xd2 ... 0xd3: /* Grp2 */
- c->src.val = c->regs[VCPU_REGS_RCX];
+ ctxt->src.val = ctxt->regs[VCPU_REGS_RCX];
rc = em_grp2(ctxt);
break;
- case 0xe0 ... 0xe2: /* loop/loopz/loopnz */
- register_address_increment(c, &c->regs[VCPU_REGS_RCX], -1);
- if (address_mask(c, c->regs[VCPU_REGS_RCX]) != 0 &&
- (c->b == 0xe2 || test_cc(c->b ^ 0x5, ctxt->eflags)))
- jmp_rel(c, c->src.val);
- break;
- case 0xe3: /* jcxz/jecxz/jrcxz */
- if (address_mask(c, c->regs[VCPU_REGS_RCX]) == 0)
- jmp_rel(c, c->src.val);
- break;
case 0xe4: /* inb */
case 0xe5: /* in */
goto do_io_in;
case 0xe7: /* out */
goto do_io_out;
case 0xe8: /* call (near) */ {
- long int rel = c->src.val;
- c->src.val = (unsigned long) c->eip;
- jmp_rel(c, rel);
+ long int rel = ctxt->src.val;
+ ctxt->src.val = (unsigned long) ctxt->_eip;
+ jmp_rel(ctxt, rel);
rc = em_push(ctxt);
break;
}
case 0xe9: /* jmp rel */
- goto jmp;
- case 0xea: /* jmp far */
- rc = em_jmp_far(ctxt);
- break;
- case 0xeb:
- jmp: /* jmp rel short */
- jmp_rel(c, c->src.val);
- c->dst.type = OP_NONE; /* Disable writeback. */
+ case 0xeb: /* jmp rel short */
+ jmp_rel(ctxt, ctxt->src.val);
+ ctxt->dst.type = OP_NONE; /* Disable writeback. */
break;
case 0xec: /* in al,dx */
case 0xed: /* in (e/r)ax,dx */
- c->src.val = c->regs[VCPU_REGS_RDX];
do_io_in:
- if (!pio_in_emulated(ctxt, ops, c->dst.bytes, c->src.val,
- &c->dst.val))
+ if (!pio_in_emulated(ctxt, ctxt->dst.bytes, ctxt->src.val,
+ &ctxt->dst.val))
goto done; /* IO is needed */
break;
case 0xee: /* out dx,al */
case 0xef: /* out dx,(e/r)ax */
- c->dst.val = c->regs[VCPU_REGS_RDX];
do_io_out:
- ops->pio_out_emulated(ctxt, c->src.bytes, c->dst.val,
- &c->src.val, 1);
- c->dst.type = OP_NONE; /* Disable writeback. */
+ ops->pio_out_emulated(ctxt, ctxt->src.bytes, ctxt->dst.val,
+ &ctxt->src.val, 1);
+ ctxt->dst.type = OP_NONE; /* Disable writeback. */
break;
case 0xf4: /* hlt */
ctxt->ops->halt(ctxt);
case 0xf9: /* stc */
ctxt->eflags |= EFLG_CF;
break;
- case 0xfa: /* cli */
- if (emulator_bad_iopl(ctxt, ops)) {
- rc = emulate_gp(ctxt, 0);
- goto done;
- } else
- ctxt->eflags &= ~X86_EFLAGS_IF;
- break;
- case 0xfb: /* sti */
- if (emulator_bad_iopl(ctxt, ops)) {
- rc = emulate_gp(ctxt, 0);
- goto done;
- } else {
- ctxt->interruptibility = KVM_X86_SHADOW_INT_STI;
- ctxt->eflags |= X86_EFLAGS_IF;
- }
- break;
case 0xfc: /* cld */
ctxt->eflags &= ~EFLG_DF;
break;
* restore dst type in case the decoding will be reused
* (happens for string instruction )
*/
- c->dst.type = saved_dst_type;
+ ctxt->dst.type = saved_dst_type;
- if ((c->d & SrcMask) == SrcSI)
- string_addr_inc(ctxt, seg_override(ctxt, c),
- VCPU_REGS_RSI, &c->src);
+ if ((ctxt->d & SrcMask) == SrcSI)
+ string_addr_inc(ctxt, seg_override(ctxt),
+ VCPU_REGS_RSI, &ctxt->src);
- if ((c->d & DstMask) == DstDI)
+ if ((ctxt->d & DstMask) == DstDI)
string_addr_inc(ctxt, VCPU_SREG_ES, VCPU_REGS_RDI,
- &c->dst);
+ &ctxt->dst);
- if (c->rep_prefix && (c->d & String)) {
- struct read_cache *r = &ctxt->decode.io_read;
- register_address_increment(c, &c->regs[VCPU_REGS_RCX], -1);
+ if (ctxt->rep_prefix && (ctxt->d & String)) {
+ struct read_cache *r = &ctxt->io_read;
+ register_address_increment(ctxt, &ctxt->regs[VCPU_REGS_RCX], -1);
if (!string_insn_completed(ctxt)) {
/*
* Re-enter guest when pio read ahead buffer is empty
* or, if it is not used, after each 1024 iteration.
*/
- if ((r->end != 0 || c->regs[VCPU_REGS_RCX] & 0x3ff) &&
+ if ((r->end != 0 || ctxt->regs[VCPU_REGS_RCX] & 0x3ff) &&
(r->end == 0 || r->end != r->pos)) {
/*
* Reset read cache. Usually happens before
* decode, but since instruction is restarted
* we have to do it here.
*/
- ctxt->decode.mem_read.end = 0;
+ ctxt->mem_read.end = 0;
return EMULATION_RESTART;
}
goto done; /* skip rip writeback */
}
}
- ctxt->eip = c->eip;
+ ctxt->eip = ctxt->_eip;
done:
if (rc == X86EMUL_PROPAGATE_FAULT)
return (rc == X86EMUL_UNHANDLEABLE) ? EMULATION_FAILED : EMULATION_OK;
twobyte_insn:
- switch (c->b) {
- case 0x05: /* syscall */
- rc = emulate_syscall(ctxt, ops);
- break;
- case 0x06:
- rc = em_clts(ctxt);
- break;
+ switch (ctxt->b) {
case 0x09: /* wbinvd */
(ctxt->ops->wbinvd)(ctxt);
break;
case 0x18: /* Grp16 (prefetch/nop) */
break;
case 0x20: /* mov cr, reg */
- c->dst.val = ops->get_cr(ctxt, c->modrm_reg);
+ ctxt->dst.val = ops->get_cr(ctxt, ctxt->modrm_reg);
break;
case 0x21: /* mov from dr to reg */
- ops->get_dr(ctxt, c->modrm_reg, &c->dst.val);
+ ops->get_dr(ctxt, ctxt->modrm_reg, &ctxt->dst.val);
break;
case 0x22: /* mov reg, cr */
- if (ops->set_cr(ctxt, c->modrm_reg, c->src.val)) {
+ if (ops->set_cr(ctxt, ctxt->modrm_reg, ctxt->src.val)) {
emulate_gp(ctxt, 0);
rc = X86EMUL_PROPAGATE_FAULT;
goto done;
}
- c->dst.type = OP_NONE;
+ ctxt->dst.type = OP_NONE;
break;
case 0x23: /* mov from reg to dr */
- if (ops->set_dr(ctxt, c->modrm_reg, c->src.val &
+ if (ops->set_dr(ctxt, ctxt->modrm_reg, ctxt->src.val &
((ctxt->mode == X86EMUL_MODE_PROT64) ?
~0ULL : ~0U)) < 0) {
/* #UD condition is already handled by the code above */
goto done;
}
- c->dst.type = OP_NONE; /* no writeback */
+ ctxt->dst.type = OP_NONE; /* no writeback */
break;
case 0x30:
/* wrmsr */
- msr_data = (u32)c->regs[VCPU_REGS_RAX]
- | ((u64)c->regs[VCPU_REGS_RDX] << 32);
- if (ops->set_msr(ctxt, c->regs[VCPU_REGS_RCX], msr_data)) {
+ msr_data = (u32)ctxt->regs[VCPU_REGS_RAX]
+ | ((u64)ctxt->regs[VCPU_REGS_RDX] << 32);
+ if (ops->set_msr(ctxt, ctxt->regs[VCPU_REGS_RCX], msr_data)) {
emulate_gp(ctxt, 0);
rc = X86EMUL_PROPAGATE_FAULT;
goto done;
break;
case 0x32:
/* rdmsr */
- if (ops->get_msr(ctxt, c->regs[VCPU_REGS_RCX], &msr_data)) {
+ if (ops->get_msr(ctxt, ctxt->regs[VCPU_REGS_RCX], &msr_data)) {
emulate_gp(ctxt, 0);
rc = X86EMUL_PROPAGATE_FAULT;
goto done;
} else {
- c->regs[VCPU_REGS_RAX] = (u32)msr_data;
- c->regs[VCPU_REGS_RDX] = msr_data >> 32;
+ ctxt->regs[VCPU_REGS_RAX] = (u32)msr_data;
+ ctxt->regs[VCPU_REGS_RDX] = msr_data >> 32;
}
rc = X86EMUL_CONTINUE;
break;
- case 0x34: /* sysenter */
- rc = emulate_sysenter(ctxt, ops);
- break;
- case 0x35: /* sysexit */
- rc = emulate_sysexit(ctxt, ops);
- break;
case 0x40 ... 0x4f: /* cmov */
- c->dst.val = c->dst.orig_val = c->src.val;
- if (!test_cc(c->b, ctxt->eflags))
- c->dst.type = OP_NONE; /* no writeback */
+ ctxt->dst.val = ctxt->dst.orig_val = ctxt->src.val;
+ if (!test_cc(ctxt->b, ctxt->eflags))
+ ctxt->dst.type = OP_NONE; /* no writeback */
break;
case 0x80 ... 0x8f: /* jnz rel, etc*/
- if (test_cc(c->b, ctxt->eflags))
- jmp_rel(c, c->src.val);
+ if (test_cc(ctxt->b, ctxt->eflags))
+ jmp_rel(ctxt, ctxt->src.val);
break;
case 0x90 ... 0x9f: /* setcc r/m8 */
- c->dst.val = test_cc(c->b, ctxt->eflags);
+ ctxt->dst.val = test_cc(ctxt->b, ctxt->eflags);
break;
case 0xa0: /* push fs */
- rc = emulate_push_sreg(ctxt, ops, VCPU_SREG_FS);
+ rc = emulate_push_sreg(ctxt, VCPU_SREG_FS);
break;
case 0xa1: /* pop fs */
- rc = emulate_pop_sreg(ctxt, ops, VCPU_SREG_FS);
+ rc = emulate_pop_sreg(ctxt, VCPU_SREG_FS);
break;
case 0xa3:
bt: /* bt */
- c->dst.type = OP_NONE;
+ ctxt->dst.type = OP_NONE;
/* only subword offset */
- c->src.val &= (c->dst.bytes << 3) - 1;
- emulate_2op_SrcV_nobyte("bt", c->src, c->dst, ctxt->eflags);
+ ctxt->src.val &= (ctxt->dst.bytes << 3) - 1;
+ emulate_2op_SrcV_nobyte("bt", ctxt->src, ctxt->dst, ctxt->eflags);
break;
case 0xa4: /* shld imm8, r, r/m */
case 0xa5: /* shld cl, r, r/m */
- emulate_2op_cl("shld", c->src2, c->src, c->dst, ctxt->eflags);
+ emulate_2op_cl("shld", ctxt->src2, ctxt->src, ctxt->dst, ctxt->eflags);
break;
case 0xa8: /* push gs */
- rc = emulate_push_sreg(ctxt, ops, VCPU_SREG_GS);
+ rc = emulate_push_sreg(ctxt, VCPU_SREG_GS);
break;
case 0xa9: /* pop gs */
- rc = emulate_pop_sreg(ctxt, ops, VCPU_SREG_GS);
+ rc = emulate_pop_sreg(ctxt, VCPU_SREG_GS);
break;
case 0xab:
bts: /* bts */
- emulate_2op_SrcV_nobyte("bts", c->src, c->dst, ctxt->eflags);
+ emulate_2op_SrcV_nobyte("bts", ctxt->src, ctxt->dst, ctxt->eflags);
break;
case 0xac: /* shrd imm8, r, r/m */
case 0xad: /* shrd cl, r, r/m */
- emulate_2op_cl("shrd", c->src2, c->src, c->dst, ctxt->eflags);
+ emulate_2op_cl("shrd", ctxt->src2, ctxt->src, ctxt->dst, ctxt->eflags);
break;
case 0xae: /* clflush */
break;
* Save real source value, then compare EAX against
* destination.
*/
- c->src.orig_val = c->src.val;
- c->src.val = c->regs[VCPU_REGS_RAX];
- emulate_2op_SrcV("cmp", c->src, c->dst, ctxt->eflags);
+ ctxt->src.orig_val = ctxt->src.val;
+ ctxt->src.val = ctxt->regs[VCPU_REGS_RAX];
+ emulate_2op_SrcV("cmp", ctxt->src, ctxt->dst, ctxt->eflags);
if (ctxt->eflags & EFLG_ZF) {
/* Success: write back to memory. */
- c->dst.val = c->src.orig_val;
+ ctxt->dst.val = ctxt->src.orig_val;
} else {
/* Failure: write the value we saw to EAX. */
- c->dst.type = OP_REG;
- c->dst.addr.reg = (unsigned long *)&c->regs[VCPU_REGS_RAX];
+ ctxt->dst.type = OP_REG;
+ ctxt->dst.addr.reg = (unsigned long *)&ctxt->regs[VCPU_REGS_RAX];
}
break;
case 0xb2: /* lss */
- rc = emulate_load_segment(ctxt, ops, VCPU_SREG_SS);
+ rc = emulate_load_segment(ctxt, VCPU_SREG_SS);
break;
case 0xb3:
btr: /* btr */
- emulate_2op_SrcV_nobyte("btr", c->src, c->dst, ctxt->eflags);
+ emulate_2op_SrcV_nobyte("btr", ctxt->src, ctxt->dst, ctxt->eflags);
break;
case 0xb4: /* lfs */
- rc = emulate_load_segment(ctxt, ops, VCPU_SREG_FS);
+ rc = emulate_load_segment(ctxt, VCPU_SREG_FS);
break;
case 0xb5: /* lgs */
- rc = emulate_load_segment(ctxt, ops, VCPU_SREG_GS);
+ rc = emulate_load_segment(ctxt, VCPU_SREG_GS);
break;
case 0xb6 ... 0xb7: /* movzx */
- c->dst.bytes = c->op_bytes;
- c->dst.val = (c->d & ByteOp) ? (u8) c->src.val
- : (u16) c->src.val;
+ ctxt->dst.bytes = ctxt->op_bytes;
+ ctxt->dst.val = (ctxt->d & ByteOp) ? (u8) ctxt->src.val
+ : (u16) ctxt->src.val;
break;
case 0xba: /* Grp8 */
- switch (c->modrm_reg & 3) {
+ switch (ctxt->modrm_reg & 3) {
case 0:
goto bt;
case 1:
break;
case 0xbb:
btc: /* btc */
- emulate_2op_SrcV_nobyte("btc", c->src, c->dst, ctxt->eflags);
+ emulate_2op_SrcV_nobyte("btc", ctxt->src, ctxt->dst, ctxt->eflags);
break;
case 0xbc: { /* bsf */
u8 zf;
__asm__ ("bsf %2, %0; setz %1"
- : "=r"(c->dst.val), "=q"(zf)
- : "r"(c->src.val));
+ : "=r"(ctxt->dst.val), "=q"(zf)
+ : "r"(ctxt->src.val));
ctxt->eflags &= ~X86_EFLAGS_ZF;
if (zf) {
ctxt->eflags |= X86_EFLAGS_ZF;
- c->dst.type = OP_NONE; /* Disable writeback. */
+ ctxt->dst.type = OP_NONE; /* Disable writeback. */
}
break;
}
case 0xbd: { /* bsr */
u8 zf;
__asm__ ("bsr %2, %0; setz %1"
- : "=r"(c->dst.val), "=q"(zf)
- : "r"(c->src.val));
+ : "=r"(ctxt->dst.val), "=q"(zf)
+ : "r"(ctxt->src.val));
ctxt->eflags &= ~X86_EFLAGS_ZF;
if (zf) {
ctxt->eflags |= X86_EFLAGS_ZF;
- c->dst.type = OP_NONE; /* Disable writeback. */
+ ctxt->dst.type = OP_NONE; /* Disable writeback. */
}
break;
}
case 0xbe ... 0xbf: /* movsx */
- c->dst.bytes = c->op_bytes;
- c->dst.val = (c->d & ByteOp) ? (s8) c->src.val :
- (s16) c->src.val;
+ ctxt->dst.bytes = ctxt->op_bytes;
+ ctxt->dst.val = (ctxt->d & ByteOp) ? (s8) ctxt->src.val :
+ (s16) ctxt->src.val;
break;
case 0xc0 ... 0xc1: /* xadd */
- emulate_2op_SrcV("add", c->src, c->dst, ctxt->eflags);
+ emulate_2op_SrcV("add", ctxt->src, ctxt->dst, ctxt->eflags);
/* Write back the register source. */
- c->src.val = c->dst.orig_val;
- write_register_operand(&c->src);
+ ctxt->src.val = ctxt->dst.orig_val;
+ write_register_operand(&ctxt->src);
break;
case 0xc3: /* movnti */
- c->dst.bytes = c->op_bytes;
- c->dst.val = (c->op_bytes == 4) ? (u32) c->src.val :
- (u64) c->src.val;
+ ctxt->dst.bytes = ctxt->op_bytes;
+ ctxt->dst.val = (ctxt->op_bytes == 4) ? (u32) ctxt->src.val :
+ (u64) ctxt->src.val;
break;
case 0xc7: /* Grp9 (cmpxchg8b) */
rc = em_grp9(ctxt);
git.openpandora.org / pandora-kernel.git / blobdiff