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354 lines
14 KiB
C
354 lines
14 KiB
C
/* Interface between the opcode library and its callers.
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Copyright (C) 1999-2018 Free Software Foundation, Inc.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3, or (at your option)
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any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street - Fifth Floor,
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Boston, MA 02110-1301, USA.
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Written by Cygnus Support, 1993.
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The opcode library (libopcodes.a) provides instruction decoders for
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a large variety of instruction sets, callable with an identical
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interface, for making instruction-processing programs more independent
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of the instruction set being processed. */
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#ifndef DIS_ASM_H
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#define DIS_ASM_H
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#ifdef __cplusplus
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extern "C" {
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#endif
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#include <stdio.h>
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#include "bfd.h"
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typedef int (*fprintf_ftype) (void *, const char*, ...) ATTRIBUTE_FPTR_PRINTF_2;
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enum dis_insn_type
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{
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dis_noninsn, /* Not a valid instruction. */
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dis_nonbranch, /* Not a branch instruction. */
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dis_branch, /* Unconditional branch. */
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dis_condbranch, /* Conditional branch. */
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dis_jsr, /* Jump to subroutine. */
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dis_condjsr, /* Conditional jump to subroutine. */
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dis_dref, /* Data reference instruction. */
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dis_dref2 /* Two data references in instruction. */
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};
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/* This struct is passed into the instruction decoding routine,
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and is passed back out into each callback. The various fields are used
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for conveying information from your main routine into your callbacks,
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for passing information into the instruction decoders (such as the
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addresses of the callback functions), or for passing information
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back from the instruction decoders to their callers.
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It must be initialized before it is first passed; this can be done
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by hand, or using one of the initialization macros below. */
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typedef struct disassemble_info
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{
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fprintf_ftype fprintf_func;
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void *stream;
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void *application_data;
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/* Target description. We could replace this with a pointer to the bfd,
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but that would require one. There currently isn't any such requirement
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so to avoid introducing one we record these explicitly. */
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/* The bfd_flavour. This can be bfd_target_unknown_flavour. */
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enum bfd_flavour flavour;
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/* The bfd_arch value. */
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enum bfd_architecture arch;
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/* The bfd_mach value. */
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unsigned long mach;
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/* Endianness (for bi-endian cpus). Mono-endian cpus can ignore this. */
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enum bfd_endian endian;
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/* Endianness of code, for mixed-endian situations such as ARM BE8. */
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enum bfd_endian endian_code;
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/* An arch/mach-specific bitmask of selected instruction subsets, mainly
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for processors with run-time-switchable instruction sets. The default,
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zero, means that there is no constraint. CGEN-based opcodes ports
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may use ISA_foo masks. */
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void *insn_sets;
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/* Some targets need information about the current section to accurately
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display insns. If this is NULL, the target disassembler function
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will have to make its best guess. */
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asection *section;
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/* An array of pointers to symbols either at the location being disassembled
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or at the start of the function being disassembled. The array is sorted
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so that the first symbol is intended to be the one used. The others are
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present for any misc. purposes. This is not set reliably, but if it is
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not NULL, it is correct. */
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asymbol **symbols;
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/* Number of symbols in array. */
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int num_symbols;
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/* Symbol table provided for targets that want to look at it. This is
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used on Arm to find mapping symbols and determine Arm/Thumb code. */
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asymbol **symtab;
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int symtab_pos;
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int symtab_size;
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/* For use by the disassembler.
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The top 16 bits are reserved for public use (and are documented here).
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The bottom 16 bits are for the internal use of the disassembler. */
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unsigned long flags;
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/* Set if the disassembler has determined that there are one or more
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relocations associated with the instruction being disassembled. */
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#define INSN_HAS_RELOC (1 << 31)
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/* Set if the user has requested the disassembly of data as well as code. */
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#define DISASSEMBLE_DATA (1 << 30)
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/* Set if the user has specifically set the machine type encoded in the
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mach field of this structure. */
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#define USER_SPECIFIED_MACHINE_TYPE (1 << 29)
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/* Use internally by the target specific disassembly code. */
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void *private_data;
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/* Function used to get bytes to disassemble. MEMADDR is the
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address of the stuff to be disassembled, MYADDR is the address to
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put the bytes in, and LENGTH is the number of bytes to read.
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INFO is a pointer to this struct.
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Returns an errno value or 0 for success. */
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int (*read_memory_func)
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(bfd_vma memaddr, bfd_byte *myaddr, unsigned int length,
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struct disassemble_info *dinfo);
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/* Function which should be called if we get an error that we can't
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recover from. STATUS is the errno value from read_memory_func and
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MEMADDR is the address that we were trying to read. INFO is a
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pointer to this struct. */
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void (*memory_error_func)
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(int status, bfd_vma memaddr, struct disassemble_info *dinfo);
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/* Function called to print ADDR. */
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void (*print_address_func)
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(bfd_vma addr, struct disassemble_info *dinfo);
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/* Function called to determine if there is a symbol at the given ADDR.
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If there is, the function returns 1, otherwise it returns 0.
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This is used by ports which support an overlay manager where
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the overlay number is held in the top part of an address. In
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some circumstances we want to include the overlay number in the
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address, (normally because there is a symbol associated with
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that address), but sometimes we want to mask out the overlay bits. */
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int (* symbol_at_address_func)
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(bfd_vma addr, struct disassemble_info *dinfo);
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/* Function called to check if a SYMBOL is can be displayed to the user.
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This is used by some ports that want to hide special symbols when
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displaying debugging outout. */
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bfd_boolean (* symbol_is_valid)
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(asymbol *, struct disassemble_info *dinfo);
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/* These are for buffer_read_memory. */
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bfd_byte *buffer;
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bfd_vma buffer_vma;
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size_t buffer_length;
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/* This variable may be set by the instruction decoder. It suggests
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the number of bytes objdump should display on a single line. If
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the instruction decoder sets this, it should always set it to
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the same value in order to get reasonable looking output. */
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int bytes_per_line;
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/* The next two variables control the way objdump displays the raw data. */
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/* For example, if bytes_per_line is 8 and bytes_per_chunk is 4, the */
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/* output will look like this:
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00: 00000000 00000000
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with the chunks displayed according to "display_endian". */
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int bytes_per_chunk;
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enum bfd_endian display_endian;
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/* Number of octets per incremented target address
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Normally one, but some DSPs have byte sizes of 16 or 32 bits. */
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unsigned int octets_per_byte;
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/* The number of zeroes we want to see at the end of a section before we
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start skipping them. */
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unsigned int skip_zeroes;
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/* The number of zeroes to skip at the end of a section. If the number
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of zeroes at the end is between SKIP_ZEROES_AT_END and SKIP_ZEROES,
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they will be disassembled. If there are fewer than
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SKIP_ZEROES_AT_END, they will be skipped. This is a heuristic
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attempt to avoid disassembling zeroes inserted by section
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alignment. */
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unsigned int skip_zeroes_at_end;
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/* Whether the disassembler always needs the relocations. */
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bfd_boolean disassembler_needs_relocs;
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/* Results from instruction decoders. Not all decoders yet support
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this information. This info is set each time an instruction is
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decoded, and is only valid for the last such instruction.
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To determine whether this decoder supports this information, set
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insn_info_valid to 0, decode an instruction, then check it. */
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char insn_info_valid; /* Branch info has been set. */
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char branch_delay_insns; /* How many sequential insn's will run before
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a branch takes effect. (0 = normal) */
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char data_size; /* Size of data reference in insn, in bytes */
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enum dis_insn_type insn_type; /* Type of instruction */
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bfd_vma target; /* Target address of branch or dref, if known;
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zero if unknown. */
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bfd_vma target2; /* Second target address for dref2 */
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/* Command line options specific to the target disassembler. */
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const char *disassembler_options;
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/* If non-zero then try not disassemble beyond this address, even if
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there are values left in the buffer. This address is the address
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of the nearest symbol forwards from the start of the disassembly,
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and it is assumed that it lies on the boundary between instructions.
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If an instruction spans this address then this is an error in the
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file being disassembled. */
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bfd_vma stop_vma;
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} disassemble_info;
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/* This struct is used to pass information about valid disassembler options
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and their descriptions from the target to the generic GDB functions that
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set and display them. */
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typedef struct
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{
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const char **name;
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const char **description;
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} disasm_options_t;
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/* Standard disassemblers. Disassemble one instruction at the given
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target address. Return number of octets processed. */
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typedef int (*disassembler_ftype) (bfd_vma, disassemble_info *);
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/* Disassemblers used out side of opcodes library. */
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extern int print_insn_m32c (bfd_vma, disassemble_info *);
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extern int print_insn_mep (bfd_vma, disassemble_info *);
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extern int print_insn_sh (bfd_vma, disassemble_info *);
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extern int print_insn_sh64x_media (bfd_vma, disassemble_info *);
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extern int print_insn_sparc (bfd_vma, disassemble_info *);
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extern int print_insn_rx (bfd_vma, disassemble_info *);
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extern int print_insn_rl78 (bfd_vma, disassemble_info *);
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extern int print_insn_rl78_g10 (bfd_vma, disassemble_info *);
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extern int print_insn_rl78_g13 (bfd_vma, disassemble_info *);
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extern int print_insn_rl78_g14 (bfd_vma, disassemble_info *);
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extern disassembler_ftype arc_get_disassembler (bfd *);
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extern disassembler_ftype cris_get_disassembler (bfd *);
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extern void print_aarch64_disassembler_options (FILE *);
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extern void print_i386_disassembler_options (FILE *);
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extern void print_mips_disassembler_options (FILE *);
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extern void print_ppc_disassembler_options (FILE *);
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extern void print_riscv_disassembler_options (FILE *);
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extern void print_arm_disassembler_options (FILE *);
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extern void print_arc_disassembler_options (FILE *);
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extern void print_s390_disassembler_options (FILE *);
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extern void print_wasm32_disassembler_options (FILE *);
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extern bfd_boolean aarch64_symbol_is_valid (asymbol *, struct disassemble_info *);
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extern bfd_boolean arm_symbol_is_valid (asymbol *, struct disassemble_info *);
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extern void disassemble_init_powerpc (struct disassemble_info *);
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extern void disassemble_init_s390 (struct disassemble_info *);
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extern void disassemble_init_wasm32 (struct disassemble_info *);
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extern const disasm_options_t *disassembler_options_powerpc (void);
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extern const disasm_options_t *disassembler_options_arm (void);
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extern const disasm_options_t *disassembler_options_s390 (void);
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/* Fetch the disassembler for a given architecture ARC, endianess (big
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endian if BIG is true), bfd_mach value MACH, and ABFD, if that support
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is available. ABFD may be NULL. */
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extern disassembler_ftype disassembler (enum bfd_architecture arc,
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bfd_boolean big, unsigned long mach,
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bfd *abfd);
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/* Amend the disassemble_info structure as necessary for the target architecture.
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Should only be called after initialising the info->arch field. */
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extern void disassemble_init_for_target (struct disassemble_info * dinfo);
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/* Document any target specific options available from the disassembler. */
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extern void disassembler_usage (FILE *);
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/* Remove whitespace and consecutive commas. */
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extern char *remove_whitespace_and_extra_commas (char *);
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/* Like STRCMP, but treat ',' the same as '\0' so that we match
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strings like "foobar" against "foobar,xxyyzz,...". */
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extern int disassembler_options_cmp (const char *, const char *);
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/* A helper function for FOR_EACH_DISASSEMBLER_OPTION. */
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static inline const char *
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next_disassembler_option (const char *options)
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{
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const char *opt = strchr (options, ',');
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if (opt != NULL)
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opt++;
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return opt;
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}
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/* A macro for iterating over each comma separated option in OPTIONS. */
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#define FOR_EACH_DISASSEMBLER_OPTION(OPT, OPTIONS) \
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for ((OPT) = (OPTIONS); \
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(OPT) != NULL; \
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(OPT) = next_disassembler_option (OPT))
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/* This block of definitions is for particular callers who read instructions
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into a buffer before calling the instruction decoder. */
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/* Here is a function which callers may wish to use for read_memory_func.
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It gets bytes from a buffer. */
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extern int buffer_read_memory
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(bfd_vma, bfd_byte *, unsigned int, struct disassemble_info *);
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/* This function goes with buffer_read_memory.
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It prints a message using info->fprintf_func and info->stream. */
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extern void perror_memory (int, bfd_vma, struct disassemble_info *);
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/* Just print the address in hex. This is included for completeness even
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though both GDB and objdump provide their own (to print symbolic
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addresses). */
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extern void generic_print_address
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(bfd_vma, struct disassemble_info *);
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/* Always true. */
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extern int generic_symbol_at_address
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(bfd_vma, struct disassemble_info *);
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/* Also always true. */
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extern bfd_boolean generic_symbol_is_valid
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(asymbol *, struct disassemble_info *);
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/* Method to initialize a disassemble_info struct. This should be
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called by all applications creating such a struct. */
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extern void init_disassemble_info (struct disassemble_info *dinfo, void *stream,
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fprintf_ftype fprintf_func);
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/* For compatibility with existing code. */
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#define INIT_DISASSEMBLE_INFO(INFO, STREAM, FPRINTF_FUNC) \
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init_disassemble_info (&(INFO), (STREAM), (fprintf_ftype) (FPRINTF_FUNC))
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#define INIT_DISASSEMBLE_INFO_NO_ARCH(INFO, STREAM, FPRINTF_FUNC) \
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init_disassemble_info (&(INFO), (STREAM), (fprintf_ftype) (FPRINTF_FUNC))
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#ifdef __cplusplus
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}
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#endif
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#endif /* ! defined (DIS_ASM_H) */
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