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Diffstat (limited to 'binutils-2.25/include/opcode/i386.h')
-rw-r--r-- | binutils-2.25/include/opcode/i386.h | 148 |
1 files changed, 148 insertions, 0 deletions
diff --git a/binutils-2.25/include/opcode/i386.h b/binutils-2.25/include/opcode/i386.h new file mode 100644 index 00000000..6021002b --- /dev/null +++ b/binutils-2.25/include/opcode/i386.h @@ -0,0 +1,148 @@ +/* opcode/i386.h -- Intel 80386 opcode macros + Copyright 1989, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, + 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010 + Free Software Foundation, Inc. + + This file is part of GAS, the GNU Assembler, and GDB, the GNU Debugger. + + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 3 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 General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program; if not, write to the Free Software + Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, + MA 02110-1301, USA. */ + +/* The SystemV/386 SVR3.2 assembler, and probably all AT&T derived + ix86 Unix assemblers, generate floating point instructions with + reversed source and destination registers in certain cases. + Unfortunately, gcc and possibly many other programs use this + reversed syntax, so we're stuck with it. + + eg. `fsub %st(3),%st' results in st = st - st(3) as expected, but + `fsub %st,%st(3)' results in st(3) = st - st(3), rather than + the expected st(3) = st(3) - st + + This happens with all the non-commutative arithmetic floating point + operations with two register operands, where the source register is + %st, and destination register is %st(i). + + The affected opcode map is dceX, dcfX, deeX, defX. */ + +#ifndef OPCODE_I386_H +#define OPCODE_I386_H + +#ifndef SYSV386_COMPAT +/* Set non-zero for broken, compatible instructions. Set to zero for + non-broken opcodes at your peril. gcc generates SystemV/386 + compatible instructions. */ +#define SYSV386_COMPAT 1 +#endif +#ifndef OLDGCC_COMPAT +/* Set non-zero to cater for old (<= 2.8.1) versions of gcc that could + generate nonsense fsubp, fsubrp, fdivp and fdivrp with operands + reversed. */ +#define OLDGCC_COMPAT SYSV386_COMPAT +#endif + +#define MOV_AX_DISP32 0xa0 +#define POP_SEG_SHORT 0x07 +#define JUMP_PC_RELATIVE 0xeb +#define INT_OPCODE 0xcd +#define INT3_OPCODE 0xcc +/* The opcode for the fwait instruction, which disassembler treats as a + prefix when it can. */ +#define FWAIT_OPCODE 0x9b + +/* Instruction prefixes. + NOTE: For certain SSE* instructions, 0x66,0xf2,0xf3 are treated as + part of the opcode. Other prefixes may still appear between them + and the 0x0f part of the opcode. */ +#define ADDR_PREFIX_OPCODE 0x67 +#define DATA_PREFIX_OPCODE 0x66 +#define LOCK_PREFIX_OPCODE 0xf0 +#define CS_PREFIX_OPCODE 0x2e +#define DS_PREFIX_OPCODE 0x3e +#define ES_PREFIX_OPCODE 0x26 +#define FS_PREFIX_OPCODE 0x64 +#define GS_PREFIX_OPCODE 0x65 +#define SS_PREFIX_OPCODE 0x36 +#define REPNE_PREFIX_OPCODE 0xf2 +#define REPE_PREFIX_OPCODE 0xf3 +#define XACQUIRE_PREFIX_OPCODE 0xf2 +#define XRELEASE_PREFIX_OPCODE 0xf3 +#define BND_PREFIX_OPCODE 0xf2 + +#define TWO_BYTE_OPCODE_ESCAPE 0x0f +#define NOP_OPCODE (char) 0x90 + +/* register numbers */ +#define EAX_REG_NUM 0 +#define ECX_REG_NUM 1 +#define EDX_REG_NUM 2 +#define EBX_REG_NUM 3 +#define ESP_REG_NUM 4 +#define EBP_REG_NUM 5 +#define ESI_REG_NUM 6 +#define EDI_REG_NUM 7 + +/* modrm_byte.regmem for twobyte escape */ +#define ESCAPE_TO_TWO_BYTE_ADDRESSING ESP_REG_NUM +/* index_base_byte.index for no index register addressing */ +#define NO_INDEX_REGISTER ESP_REG_NUM +/* index_base_byte.base for no base register addressing */ +#define NO_BASE_REGISTER EBP_REG_NUM +#define NO_BASE_REGISTER_16 6 + +/* modrm.mode = REGMEM_FIELD_HAS_REG when a register is in there */ +#define REGMEM_FIELD_HAS_REG 0x3/* always = 0x3 */ +#define REGMEM_FIELD_HAS_MEM (~REGMEM_FIELD_HAS_REG) + +/* Extract fields from the mod/rm byte. */ +#define MODRM_MOD_FIELD(modrm) (((modrm) >> 6) & 3) +#define MODRM_REG_FIELD(modrm) (((modrm) >> 3) & 7) +#define MODRM_RM_FIELD(modrm) (((modrm) >> 0) & 7) + +/* Extract fields from the sib byte. */ +#define SIB_SCALE_FIELD(sib) (((sib) >> 6) & 3) +#define SIB_INDEX_FIELD(sib) (((sib) >> 3) & 7) +#define SIB_BASE_FIELD(sib) (((sib) >> 0) & 7) + +/* x86-64 extension prefix. */ +#define REX_OPCODE 0x40 + +/* Non-zero if OPCODE is the rex prefix. */ +#define REX_PREFIX_P(opcode) (((opcode) & 0xf0) == REX_OPCODE) + +/* Indicates 64 bit operand size. */ +#define REX_W 8 +/* High extension to reg field of modrm byte. */ +#define REX_R 4 +/* High extension to SIB index field. */ +#define REX_X 2 +/* High extension to base field of modrm or SIB, or reg field of opcode. */ +#define REX_B 1 + +/* max operands per insn */ +#define MAX_OPERANDS 5 + +/* max immediates per insn (lcall, ljmp, insertq, extrq) */ +#define MAX_IMMEDIATE_OPERANDS 2 + +/* max memory refs per insn (string ops) */ +#define MAX_MEMORY_OPERANDS 2 + +/* max size of insn mnemonics. */ +#define MAX_MNEM_SIZE 20 + +/* max size of register name in insn mnemonics. */ +#define MAX_REG_NAME_SIZE 8 + +#endif /* OPCODE_I386_H */ |