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qemu-e2k/target/i386/hvf/x86_decode.h
Cameron Esfahani 8c3b0e9e67 hvf: correctly handle REX prefix in relation to legacy prefixes 
In real x86 processors, the REX prefix must come after legacy prefixes.
REX before legacy is ignored.  Update the HVF emulation code to properly
handle this.  Fix some spelling errors in constants.  Fix some decoder
table initialization issues found by Coverity.

Signed-off-by: Cameron Esfahani <dirty@apple.com>
Message-Id: <eff30ded8307471936bec5d84c3b6efbc95e3211.1574625592.git.dirty@apple.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2019-11-26 09:58:36 +01:00

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/*
* Copyright (C) 2016 Veertu Inc,
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
#ifndef HVF_X86_DECODE_H
#define HVF_X86_DECODE_H
#include "cpu.h"
#include "x86.h"
typedef enum x86_prefix {
/* group 1 */
PREFIX_LOCK = 0xf0,
PREFIX_REPN = 0xf2,
PREFIX_REP = 0xf3,
/* group 2 */
PREFIX_CS_SEG_OVERRIDE = 0x2e,
PREFIX_SS_SEG_OVERRIDE = 0x36,
PREFIX_DS_SEG_OVERRIDE = 0x3e,
PREFIX_ES_SEG_OVERRIDE = 0x26,
PREFIX_FS_SEG_OVERRIDE = 0x64,
PREFIX_GS_SEG_OVERRIDE = 0x65,
/* group 3 */
PREFIX_OP_SIZE_OVERRIDE = 0x66,
/* group 4 */
PREFIX_ADDR_SIZE_OVERRIDE = 0x67,
PREFIX_REX = 0x40,
} x86_prefix;
enum x86_decode_cmd {
X86_DECODE_CMD_INVL = 0,
X86_DECODE_CMD_PUSH,
X86_DECODE_CMD_PUSH_SEG,
X86_DECODE_CMD_POP,
X86_DECODE_CMD_POP_SEG,
X86_DECODE_CMD_MOV,
X86_DECODE_CMD_MOVSX,
X86_DECODE_CMD_MOVZX,
X86_DECODE_CMD_CALL_NEAR,
X86_DECODE_CMD_CALL_NEAR_ABS_INDIRECT,
X86_DECODE_CMD_CALL_FAR_ABS_INDIRECT,
X86_DECODE_CMD_CALL_FAR,
X86_DECODE_RET_NEAR,
X86_DECODE_RET_FAR,
X86_DECODE_CMD_ADD,
X86_DECODE_CMD_OR,
X86_DECODE_CMD_ADC,
X86_DECODE_CMD_SBB,
X86_DECODE_CMD_AND,
X86_DECODE_CMD_SUB,
X86_DECODE_CMD_XOR,
X86_DECODE_CMD_CMP,
X86_DECODE_CMD_INC,
X86_DECODE_CMD_DEC,
X86_DECODE_CMD_TST,
X86_DECODE_CMD_NOT,
X86_DECODE_CMD_NEG,
X86_DECODE_CMD_JMP_NEAR,
X86_DECODE_CMD_JMP_NEAR_ABS_INDIRECT,
X86_DECODE_CMD_JMP_FAR,
X86_DECODE_CMD_JMP_FAR_ABS_INDIRECT,
X86_DECODE_CMD_LEA,
X86_DECODE_CMD_JXX,
X86_DECODE_CMD_JCXZ,
X86_DECODE_CMD_SETXX,
X86_DECODE_CMD_MOV_TO_SEG,
X86_DECODE_CMD_MOV_FROM_SEG,
X86_DECODE_CMD_CLI,
X86_DECODE_CMD_STI,
X86_DECODE_CMD_CLD,
X86_DECODE_CMD_STD,
X86_DECODE_CMD_STC,
X86_DECODE_CMD_CLC,
X86_DECODE_CMD_OUT,
X86_DECODE_CMD_IN,
X86_DECODE_CMD_INS,
X86_DECODE_CMD_OUTS,
X86_DECODE_CMD_LIDT,
X86_DECODE_CMD_SIDT,
X86_DECODE_CMD_LGDT,
X86_DECODE_CMD_SGDT,
X86_DECODE_CMD_SMSW,
X86_DECODE_CMD_LMSW,
X86_DECODE_CMD_RDTSCP,
X86_DECODE_CMD_INVLPG,
X86_DECODE_CMD_MOV_TO_CR,
X86_DECODE_CMD_MOV_FROM_CR,
X86_DECODE_CMD_MOV_TO_DR,
X86_DECODE_CMD_MOV_FROM_DR,
X86_DECODE_CMD_PUSHF,
X86_DECODE_CMD_POPF,
X86_DECODE_CMD_CPUID,
X86_DECODE_CMD_ROL,
X86_DECODE_CMD_ROR,
X86_DECODE_CMD_RCL,
X86_DECODE_CMD_RCR,
X86_DECODE_CMD_SHL,
X86_DECODE_CMD_SAL,
X86_DECODE_CMD_SHR,
X86_DECODE_CMD_SHRD,
X86_DECODE_CMD_SHLD,
X86_DECODE_CMD_SAR,
X86_DECODE_CMD_DIV,
X86_DECODE_CMD_IDIV,
X86_DECODE_CMD_MUL,
X86_DECODE_CMD_IMUL_3,
X86_DECODE_CMD_IMUL_2,
X86_DECODE_CMD_IMUL_1,
X86_DECODE_CMD_MOVS,
X86_DECODE_CMD_CMPS,
X86_DECODE_CMD_SCAS,
X86_DECODE_CMD_LODS,
X86_DECODE_CMD_STOS,
X86_DECODE_CMD_BSWAP,
X86_DECODE_CMD_XCHG,
X86_DECODE_CMD_RDTSC,
X86_DECODE_CMD_RDMSR,
X86_DECODE_CMD_WRMSR,
X86_DECODE_CMD_ENTER,
X86_DECODE_CMD_LEAVE,
X86_DECODE_CMD_BT,
X86_DECODE_CMD_BTS,
X86_DECODE_CMD_BTC,
X86_DECODE_CMD_BTR,
X86_DECODE_CMD_BSF,
X86_DECODE_CMD_BSR,
X86_DECODE_CMD_IRET,
X86_DECODE_CMD_INT,
X86_DECODE_CMD_POPA,
X86_DECODE_CMD_PUSHA,
X86_DECODE_CMD_CWD,
X86_DECODE_CMD_CBW,
X86_DECODE_CMD_DAS,
X86_DECODE_CMD_AAD,
X86_DECODE_CMD_AAM,
X86_DECODE_CMD_AAS,
X86_DECODE_CMD_LOOP,
X86_DECODE_CMD_SLDT,
X86_DECODE_CMD_STR,
X86_DECODE_CMD_LLDT,
X86_DECODE_CMD_LTR,
X86_DECODE_CMD_VERR,
X86_DECODE_CMD_VERW,
X86_DECODE_CMD_SAHF,
X86_DECODE_CMD_LAHF,
X86_DECODE_CMD_WBINVD,
X86_DECODE_CMD_LDS,
X86_DECODE_CMD_LSS,
X86_DECODE_CMD_LES,
X86_DECODE_XMD_LGS,
X86_DECODE_CMD_LFS,
X86_DECODE_CMD_CMC,
X86_DECODE_CMD_XLAT,
X86_DECODE_CMD_NOP,
X86_DECODE_CMD_CMOV,
X86_DECODE_CMD_CLTS,
X86_DECODE_CMD_XADD,
X86_DECODE_CMD_HLT,
X86_DECODE_CMD_CMPXCHG8B,
X86_DECODE_CMD_CMPXCHG,
X86_DECODE_CMD_POPCNT,
X86_DECODE_CMD_FNINIT,
X86_DECODE_CMD_FLD,
X86_DECODE_CMD_FLDxx,
X86_DECODE_CMD_FNSTCW,
X86_DECODE_CMD_FNSTSW,
X86_DECODE_CMD_FNSETPM,
X86_DECODE_CMD_FSAVE,
X86_DECODE_CMD_FRSTOR,
X86_DECODE_CMD_FXSAVE,
X86_DECODE_CMD_FXRSTOR,
X86_DECODE_CMD_FDIV,
X86_DECODE_CMD_FMUL,
X86_DECODE_CMD_FSUB,
X86_DECODE_CMD_FADD,
X86_DECODE_CMD_EMMS,
X86_DECODE_CMD_MFENCE,
X86_DECODE_CMD_SFENCE,
X86_DECODE_CMD_LFENCE,
X86_DECODE_CMD_PREFETCH,
X86_DECODE_CMD_CLFLUSH,
X86_DECODE_CMD_FST,
X86_DECODE_CMD_FABS,
X86_DECODE_CMD_FUCOM,
X86_DECODE_CMD_FUCOMI,
X86_DECODE_CMD_FLDCW,
X86_DECODE_CMD_FXCH,
X86_DECODE_CMD_FCHS,
X86_DECODE_CMD_FCMOV,
X86_DECODE_CMD_FRNDINT,
X86_DECODE_CMD_FXAM,
X86_DECODE_CMD_LAST,
};
const char *decode_cmd_to_string(enum x86_decode_cmd cmd);
typedef struct x86_modrm {
union {
uint8_t modrm;
struct {
uint8_t rm:3;
uint8_t reg:3;
uint8_t mod:2;
};
};
} __attribute__ ((__packed__)) x86_modrm;
typedef struct x86_sib {
union {
uint8_t sib;
struct {
uint8_t base:3;
uint8_t index:3;
uint8_t scale:2;
};
};
} __attribute__ ((__packed__)) x86_sib;
typedef struct x86_rex {
union {
uint8_t rex;
struct {
uint8_t b:1;
uint8_t x:1;
uint8_t r:1;
uint8_t w:1;
uint8_t unused:4;
};
};
} __attribute__ ((__packed__)) x86_rex;
typedef enum x86_var_type {
X86_VAR_IMMEDIATE,
X86_VAR_OFFSET,
X86_VAR_REG,
X86_VAR_RM,
/* for floating point computations */
X87_VAR_REG,
X87_VAR_FLOATP,
X87_VAR_INTP,
X87_VAR_BYTEP,
} x86_var_type;
typedef struct x86_decode_op {
enum x86_var_type type;
int size;
int reg;
target_ulong val;
target_ulong ptr;
} x86_decode_op;
typedef struct x86_decode {
int len;
uint8_t opcode[4];
uint8_t opcode_len;
enum x86_decode_cmd cmd;
int addressing_size;
int operand_size;
int lock;
int rep;
int op_size_override;
int addr_size_override;
int segment_override;
int control_change_inst;
bool fwait;
bool fpop_stack;
bool frev;
uint32_t displacement;
uint8_t displacement_size;
struct x86_rex rex;
bool is_modrm;
bool sib_present;
struct x86_sib sib;
struct x86_modrm modrm;
struct x86_decode_op op[4];
bool is_fpu;
uint32_t flags_mask;
} x86_decode;
uint64_t sign(uint64_t val, int size);
uint32_t decode_instruction(CPUX86State *env, struct x86_decode *decode);
target_ulong get_reg_ref(CPUX86State *env, int reg, int rex_present,
int is_extended, int size);
target_ulong get_reg_val(CPUX86State *env, int reg, int rex_present,
int is_extended, int size);
void calc_modrm_operand(CPUX86State *env, struct x86_decode *decode,
struct x86_decode_op *op);
target_ulong decode_linear_addr(CPUX86State *env, struct x86_decode *decode,
target_ulong addr, enum X86Seg seg);
void init_decoder(void);
void calc_modrm_operand16(CPUX86State *env, struct x86_decode *decode,
struct x86_decode_op *op);
void calc_modrm_operand32(CPUX86State *env, struct x86_decode *decode,
struct x86_decode_op *op);
void calc_modrm_operand64(CPUX86State *env, struct x86_decode *decode,
struct x86_decode_op *op);
void set_addressing_size(CPUX86State *env, struct x86_decode *decode);
void set_operand_size(CPUX86State *env, struct x86_decode *decode);
#endif
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