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/* nasm.h main header file for the Netwide Assembler: inter-module interface
*
* The Netwide Assembler is copyright (C) 1996 Simon Tatham and
* Julian Hall. All rights reserved. The software is
* redistributable under the licence given in the file "Licence"
* distributed in the NASM archive.
*
* initial version: 27/iii/95 by Simon Tatham
*/
#ifndef NASM_NASM_H
#define NASM_NASM_H
#include <stdio.h>
#ifndef NULL
#define NULL 0
#endif
#ifndef FALSE
#define FALSE 0 /* comes in handy */
#endif
#ifndef TRUE
#define TRUE 1
#endif
/*
* Name pollution problems: <time.h> on Digital UNIX pulls in some
* strange hardware header file which sees fit to define R_SP. We
* undefine it here so as not to break the enum below.
*/
#ifdef R_SP
#undef R_SP
#endif
/*
* Special values for expr->type. ASSUMPTION MADE HERE: the number
* of distinct register names (i.e. possible "type" fields for an
* expr structure) does not exceed 124 (EXPR_REG_START through
* EXPR_REG_END).
*/
#define EXPR_REG_START 1
/*
* Here we define the operand types. These are implemented as bit
* masks, since some are subsets of others; e.g. AX in a MOV
* instruction is a special operand type, whereas AX in other
* contexts is just another 16-bit register. (Also, consider CL in
* shift instructions, DX in OUT, etc.)
*/
/* size, and other attributes, of the operand */
#define BITS8 0x00000001L
#define BITS16 0x00000002L
#define BITS32 0x00000004L
#define BITS64 0x00000008L /* FPU only */
#define BITS80 0x00000010L /* FPU only */
#define FAR 0x00000020L /* grotty: this means 16:16 or */
/* 16:32, like in CALL/JMP */
#define NEAR 0x00000040L
#define SHORT 0x00000080L /* and this means what it says :) */
#define SIZE_MASK 0x000000FFL /* all the size attributes */
#define NON_SIZE (~SIZE_MASK)
#define TO 0x00000100L /* reverse effect in FADD, FSUB &c */
#define COLON 0x00000200L /* operand is followed by a colon */
/* type of operand: memory reference, register, etc. */
#define MEMORY 0x00204000L
#define REGISTER 0x00001000L /* register number in 'basereg' */
#define IMMEDIATE 0x00002000L
#define REGMEM 0x00200000L /* for r/m, ie EA, operands */
#define REGNORM 0x00201000L /* 'normal' reg, qualifies as EA */
#define REG8 0x00201001L
#define REG16 0x00201002L
#define REG32 0x00201004L
#define MMXREG 0x00201008L /* MMX registers */
#define XMMREG 0x00201010L /* XMM Katmai reg */
#define FPUREG 0x01000000L /* floating point stack registers */
#define FPU0 0x01000800L /* FPU stack register zero */
/* special register operands: these may be treated differently */
#define REG_SMASK 0x00070000L /* a mask for the following */
#define REG_ACCUM 0x00211000L /* accumulator: AL, AX or EAX */
#define REG_AL 0x00211001L /* REG_ACCUM | BITSxx */
#define REG_AX 0x00211002L /* ditto */
#define REG_EAX 0x00211004L /* and again */
#define REG_COUNT 0x00221000L /* counter: CL, CX or ECX */
#define REG_CL 0x00221001L /* REG_COUNT | BITSxx */
#define REG_CX 0x00221002L /* ditto */
#define REG_ECX 0x00221004L /* another one */
#define REG_DL 0x00241001L
#define REG_DX 0x00241002L
#define REG_EDX 0x00241004L
#define REG_SREG 0x00081002L /* any segment register */
#define REG_CS 0x01081002L /* CS */
#define REG_DESS 0x02081002L /* DS, ES, SS (non-CS 86 registers) */
#define REG_FSGS 0x04081002L /* FS, GS (386 extended registers) */
#define REG_SEG67 0x08081002L /* Non-implemented segment registers */
#define REG_CDT 0x00101004L /* CRn, DRn and TRn */
#define REG_CREG 0x08101004L /* CRn */
#define REG_DREG 0x10101004L /* DRn */
#define REG_TREG 0x20101004L /* TRn */
/* special type of EA */
#define MEM_OFFS 0x00604000L /* simple [address] offset */
/* special type of immediate operand */
#define ONENESS 0x00800000L /* so UNITY == IMMEDIATE | ONENESS */
#define UNITY 0x00802000L /* for shift/rotate instructions */
#define BYTENESS 0x40000000L /* so SBYTE == IMMEDIATE | BYTENESS */
#define SBYTE 0x40002000L /* for op r16/32,immediate instrs. */
/* Register names automatically generated from regs.dat */
/* automatically generated from ./regs.dat - do not edit */
enum reg_enum {
R_AH = EXPR_REG_START,
R_AL,
R_AX,
R_BH,
R_BL,
R_BP,
R_BX,
R_CH,
R_CL,
R_CR0,
R_CR1,
R_CR2,
R_CR3,
R_CR4,
R_CR5,
R_CR6,
R_CR7,
R_CS,
R_CX,
R_DH,
R_DI,
R_DL,
R_DR0,
R_DR1,
R_DR2,
R_DR3,
R_DR4,
R_DR5,
R_DR6,
R_DR7,
R_DS,
R_DX,
R_EAX,
R_EBP,
R_EBX,
R_ECX,
R_EDI,
R_EDX,
R_ES,
R_ESI,
R_ESP,
R_FS,
R_GS,
R_MM0,
R_MM1,
R_MM2,
R_MM3,
R_MM4,
R_MM5,
R_MM6,
R_MM7,
R_SEGR6,
R_SEGR7,
R_SI,
R_SP,
R_SS,
R_ST0,
R_ST1,
R_ST2,
R_ST3,
R_ST4,
R_ST5,
R_ST6,
R_ST7,
R_TR0,
R_TR1,
R_TR2,
R_TR3,
R_TR4,
R_TR5,
R_TR6,
R_TR7,
R_XMM0,
R_XMM1,
R_XMM2,
R_XMM3,
R_XMM4,
R_XMM5,
R_XMM6,
R_XMM7,
REG_ENUM_LIMIT
};
enum { /* condition code names */
C_A, C_AE, C_B, C_BE, C_C, C_E, C_G, C_GE, C_L, C_LE, C_NA, C_NAE,
C_NB, C_NBE, C_NC, C_NE, C_NG, C_NGE, C_NL, C_NLE, C_NO, C_NP,
C_NS, C_NZ, C_O, C_P, C_PE, C_PO, C_S, C_Z
};
/*
* Note that because segment registers may be used as instruction
* prefixes, we must ensure the enumerations for prefixes and
* register names do not overlap.
*/
enum { /* instruction prefixes */
PREFIX_ENUM_START = REG_ENUM_LIMIT,
P_A16 = PREFIX_ENUM_START, P_A32, P_LOCK, P_O16, P_O32, P_REP, P_REPE,
P_REPNE, P_REPNZ, P_REPZ, P_TIMES
};
enum { /* extended operand types */
EOT_NOTHING, EOT_DB_STRING, EOT_DB_NUMBER
};
enum { /* special EA flags */
EAF_BYTEOFFS = 1, /* force offset part to byte size */
EAF_WORDOFFS = 2, /* force offset part to [d]word size */
EAF_TIMESTWO = 4 /* really do EAX*2 not EAX+EAX */
};
enum { /* values for `hinttype' */
EAH_NOHINT = 0, /* no hint at all - our discretion */
EAH_MAKEBASE = 1, /* try to make given reg the base */
EAH_NOTBASE = 2 /* try _not_ to make reg the base */
};
typedef struct { /* operand to an instruction */
long type; /* type of operand */
int addr_size; /* 0 means default; 16; 32 */
int basereg, indexreg, scale; /* registers and scale involved */
int hintbase, hinttype; /* hint as to real base register */
long segment; /* immediate segment, if needed */
long offset; /* any immediate number */
long wrt; /* segment base it's relative to */
int eaflags; /* special EA flags */
int opflags; /* see OPFLAG_* defines below */
} operand;
#define OPFLAG_FORWARD 1 /* operand is a forward reference */
#define OPFLAG_EXTERN 2 /* operand is an external reference */
typedef struct extop { /* extended operand */
struct extop *next; /* linked list */
long type; /* defined above */
char *stringval; /* if it's a string, then here it is */
int stringlen; /* ... and here's how long it is */
long segment; /* if it's a number/address, then... */
long offset; /* ... it's given here ... */
long wrt; /* ... and here */
} extop;
#define MAXPREFIX 4
typedef struct { /* an instruction itself */
/* char *label; not needed */ /* the label defined, or NULL */
int prefixes[MAXPREFIX]; /* instruction prefixes, if any */
int nprefix; /* number of entries in above */
int opcode; /* the opcode - not just the string */
int condition; /* the condition code, if Jcc/SETcc */
int operands; /* how many operands? 0-3
* (more if db et al) */
operand oprs[3]; /* the operands, defined as above */
extop *eops; /* extended operands */
int eops_float; /* true if DD and floating */
long times; /* repeat count (TIMES prefix) */
int forw_ref; /* is there a forward reference? */
} insn;
enum geninfo { GI_SWITCH };
/*
* values for the `type' parameter to an output function. Each one
* must have the actual number of _bytes_ added to it.
*
* Exceptions are OUT_RELxADR, which denote an x-byte relocation
* which will be a relative jump. For this we need to know the
* distance in bytes from the start of the relocated record until
* the end of the containing instruction. _This_ is what is stored
* in the size part of the parameter, in this case.
*
* Also OUT_RESERVE denotes reservation of N bytes of BSS space,
* and the contents of the "data" parameter is irrelevant.
*
* The "data" parameter for the output function points to a "long",
* containing the address in question, unless the type is
* OUT_RAWDATA, in which case it points to an "unsigned char"
* array.
*/
#define OUT_RAWDATA 0x00000000UL
#define OUT_ADDRESS 0x10000000UL
#define OUT_REL2ADR 0x20000000UL
#define OUT_REL4ADR 0x30000000UL
#define OUT_RESERVE 0x40000000UL
#define OUT_TYPMASK 0xF0000000UL
#define OUT_SIZMASK 0x0FFFFFFFUL
/*
* The type definition macros
* for debugging
*
* low 3 bits: reserved
* next 5 bits: type
* next 24 bits: number of elements for arrays (0 for labels)
*/
#define TY_UNKNOWN 0x00
#define TY_LABEL 0x08
#define TY_BYTE 0x10
#define TY_WORD 0x18
#define TY_DWORD 0x20
#define TY_FLOAT 0x28
#define TY_QWORD 0x30
#define TY_TBYTE 0x38
#define TY_COMMON 0xE0
#define TY_SEG 0xE8
#define TY_EXTERN 0xF0
#define TY_EQU 0xF8
#define TYM_TYPE(x) ((x) & 0xF8)
#define TYM_ELEMENTS(x) (((x) & 0xFFFFFF00) >> 8)
#define TYS_ELEMENTS(x) ((x) << 8)
/*
* -----
* Other
* -----
*/
/*
* This is a useful #define which I keep meaning to use more often:
* the number of elements of a statically defined array.
*/
#define elements(x) ( sizeof(x) / sizeof(*(x)) )
extern int tasm_compatible_mode;
/*
* This declaration passes the "pass" number to all other modules
* "pass0" assumes the values: 0, 0, ..., 0, 1, 2
* where 0 = optimizing pass
* 1 = pass 1
* 2 = pass 2
*/
extern int pass0; /* this is globally known */
extern int optimizing;
#endif