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/* Disassemble support for GDB.
Copyright (C) 2002-2021 Free Software Foundation, Inc.
This file is part of GDB.
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, see <http://www.gnu.org/licenses/>. */
#ifndef DISASM_H
#define DISASM_H
#include "dis-asm.h"
#include "gdbsupport/enum-flags.h"
enum gdb_disassembly_flag
{
DISASSEMBLY_SOURCE_DEPRECATED = (0x1 << 0),
DISASSEMBLY_RAW_INSN = (0x1 << 1),
DISASSEMBLY_OMIT_FNAME = (0x1 << 2),
DISASSEMBLY_FILENAME = (0x1 << 3),
DISASSEMBLY_OMIT_PC = (0x1 << 4),
DISASSEMBLY_SOURCE = (0x1 << 5),
DISASSEMBLY_SPECULATIVE = (0x1 << 6),
};
DEF_ENUM_FLAGS_TYPE (enum gdb_disassembly_flag, gdb_disassembly_flags);
struct gdbarch;
struct ui_out;
struct ui_file;
class gdb_disassembler
{
using di_read_memory_ftype = decltype (disassemble_info::read_memory_func);
public:
gdb_disassembler (struct gdbarch *gdbarch, struct ui_file *file)
: gdb_disassembler (gdbarch, file, dis_asm_read_memory)
{}
~gdb_disassembler ();
DISABLE_COPY_AND_ASSIGN (gdb_disassembler);
int print_insn (CORE_ADDR memaddr, int *branch_delay_insns = NULL);
/* Return the gdbarch of gdb_disassembler. */
struct gdbarch *arch ()
{ return m_gdbarch; }
protected:
gdb_disassembler (struct gdbarch *gdbarch, struct ui_file *file,
di_read_memory_ftype func);
struct ui_file *stream ()
{ return (struct ui_file *) m_di.stream; }
private:
struct gdbarch *m_gdbarch;
/* Stores data required for disassembling instructions in
opcodes. */
struct disassemble_info m_di;
/* If we own the string in `m_di.disassembler_options', we do so
using this field. */
std::string m_disassembler_options_holder;
CORE_ADDR m_err_memaddr;
static int dis_asm_read_memory (bfd_vma memaddr, gdb_byte *myaddr,
unsigned int len,
struct disassemble_info *info);
static void dis_asm_memory_error (int err, bfd_vma memaddr,
struct disassemble_info *info);
static void dis_asm_print_address (bfd_vma addr,
struct disassemble_info *info);
};
/* An instruction to be disassembled. */
struct disasm_insn
{
/* The address of the memory containing the instruction. */
CORE_ADDR addr;
/* An optional instruction number. If non-zero, it is printed first. */
unsigned int number;
/* True if the instruction was executed speculatively. */
unsigned int is_speculative:1;
};
extern void gdb_disassembly (struct gdbarch *gdbarch, struct ui_out *uiout,
gdb_disassembly_flags flags, int how_many,
CORE_ADDR low, CORE_ADDR high);
/* Print the instruction at address MEMADDR in debugged memory,
on STREAM. Returns the length of the instruction, in bytes,
and, if requested, the number of branch delay slot instructions. */
extern int gdb_print_insn (struct gdbarch *gdbarch, CORE_ADDR memaddr,
struct ui_file *stream, int *branch_delay_insns);
/* Class used to pretty-print instructions. */
class gdb_pretty_print_disassembler
{
public:
explicit gdb_pretty_print_disassembler (struct gdbarch *gdbarch,
struct ui_out *uiout)
: m_uiout (uiout),
m_insn_stb (uiout->can_emit_style_escape ()),
m_di (gdbarch, &m_insn_stb)
{}
/* Prints the instruction INSN into the saved ui_out and returns the
length of the printed instruction in bytes. */
int pretty_print_insn (const struct disasm_insn *insn,
gdb_disassembly_flags flags);
private:
/* Returns the architecture used for disassembling. */
struct gdbarch *arch () { return m_di.arch (); }
/* The ui_out that is used by pretty_print_insn. */
struct ui_out *m_uiout;
/* The buffer used to build the instruction string. The
disassembler is initialized with this stream. */
string_file m_insn_stb;
/* The disassembler used for instruction printing. */
gdb_disassembler m_di;
/* The buffer used to build the raw opcodes string. */
string_file m_opcode_stb;
};
/* Return the length in bytes of the instruction at address MEMADDR in
debugged memory. */
extern int gdb_insn_length (struct gdbarch *gdbarch, CORE_ADDR memaddr);
/* Return the length in bytes of INSN, originally at MEMADDR. MAX_LEN
is the size of the buffer containing INSN. */
extern int gdb_buffered_insn_length (struct gdbarch *gdbarch,
const gdb_byte *insn, int max_len,
CORE_ADDR memaddr);
/* Returns GDBARCH's disassembler options. */
extern char *get_disassembler_options (struct gdbarch *gdbarch);
/* Sets the active gdbarch's disassembler options to OPTIONS. */
extern void set_disassembler_options (char *options);
#endif
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