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23ce05f906
SPDX is an international standard for documenting software license requirements. Remove the existing headers and replace with a brief SPDX preamble. See: https://spdx.dev/use/specifications/ The script used to convert the files is added to "tools", and the file header templates in headers/ are updated. Signed-off-by: H. Peter Anvin (Intel) <hpa@zytor.com>
91 lines
2.8 KiB
C
91 lines
2.8 KiB
C
/* SPDX-License-Identifier: BSD-2-Clause */
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/* Copyright 1996-2025 The NASM Authors - All Rights Reserved */
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/*
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* disasm.h header file for disasm.c
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*/
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#ifndef NASM_DISASM_H
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#define NASM_DISASM_H
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#include "nasm.h"
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#include "insnsi.h"
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#include "iflag.h"
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/*
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* This buffer must be at least twice as long as the max instruction,
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* which must include the WAIT pseudo-prefix, for a total of 15+1 = 16
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* bytes.
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*/
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#define INSN_MAX 32
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int32_t disasm(const uint8_t *dp, int32_t data_size,
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char *output, int outbufsize,
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int segsize, int64_t offset, int autosync,
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iflag_t *prefer);
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int32_t eatbyte(uint8_t byte, char *output, int outbufsize, int segsize);
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/* The rex types that matter for the purpose of decoding */
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enum rextype {
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REX_NONE,
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REX_REX,
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REX_REX2,
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REX_VEX, /* Includes XOP */
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REX_EVEX
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};
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/*
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* Prefix information
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*/
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struct rexfields {
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uint32_t raw; /* Raw value */
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uint32_t flags; /* REX_ flags from nasm.h */
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enum rextype type;
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uint8_t len; /* Length of REX prefix */
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uint8_t breg; /* B register */
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uint8_t bregbv; /* B register if B is a vector */
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uint8_t xreg; /* X register */
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uint8_t xregxv; /* X register if X is a vector */
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uint8_t vreg; /* V register */
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uint8_t vregxv; /* V register if X is a vector */
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uint8_t rreg;
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uint8_t opc; /* Masked opcode */
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uint8_t map;
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uint8_t xmap; /* Extended map (base from insnsi.h added) */
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uint8_t pp;
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uint8_t w;
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uint8_t l;
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uint8_t z;
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uint8_t b;
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uint8_t nd;
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uint8_t zu;
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uint8_t aaa;
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uint8_t nf;
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uint8_t dfl;
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uint8_t scc;
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};
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struct prefix_info {
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uint8_t osize; /* Operand size */
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uint8_t asize; /* Address size */
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uint8_t osp; /* Operand size prefix present */
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uint8_t asp; /* Address size prefix present */
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uint8_t rep; /* Rep prefix present */
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uint8_t seg; /* Segment override prefix present */
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uint8_t wait; /* WAIT "prefix" present */
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uint8_t lock; /* Lock prefix present */
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enum reg_enum segover; /* Segment override register enum */
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struct rexfields rex; /* REX/REX2/VEX/EVEX */
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};
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const uint8_t *parse_prefixes(struct prefix_info *pf, const uint8_t *data,
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int bits);
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#define fetch_safe(_start, _ptr, _size, _need, _op) \
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do { \
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if (((_ptr) - (_start)) >= ((_size) - (_need))) \
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_op; \
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} while (0)
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#endif
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