a50a402676
The "record instruction-history" command prints for each instruction in
addition to the instruction's disassembly:
- the instruction number in the recorded execution trace
- a '?' before the instruction if it was executed speculatively
To allow the "record instruction-history" command to use GDB's disassembly
infrastructure, we extend gdb_pretty_print_insn to optionally print those
additional fields and export the function.
Add a new struct disasm_insn to add additional fields describing the
to-be-disassembled instruction. The additional fields are:
number an optional instruction number, zero if omitted.
is_speculative a predicate saying whether the instruction was
executed speculatively.
If non-zero, the instruction number is printed first. It will also appear
as a new optional field "insn-number" in MI. The field will be present if
insn_num is non-zero.
If is_speculative is set, speculative execution will be indicated by a "?"
following the new instruction number field. Unless the PC is omitted, it
will overwrite the first byte of the PC prefix. It will appear as a new
optional field "is-speculative" in MI. The field will contain "?" and will
be present if is_speculative is set.
The speculative execution indication is guarded by a new flag
DISASSEMBLY_SPECULATION.
Replace the PC parameter of gdb_pretty_print_insn with a pointer to the above
struct. GDB's "disassemble" command does not use the new fields.
gdb/
* disasm.h (DISASSEMBLY_SPECULATION): New.
(struct disasm_insn): New.
(gdb_pretty_print_insn): New.
* disasm.c (gdb_pretty_print_insn): Replace parameter PC with INSN.
Update users. Print instruction number and indicate speculative
execution, if requested.
86 lines
2.9 KiB
C
86 lines
2.9 KiB
C
/* Disassemble support for GDB.
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Copyright (C) 2002-2015 Free Software Foundation, Inc.
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This file is part of GDB.
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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 of the License, or
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(at your option) 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, see <http://www.gnu.org/licenses/>. */
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#ifndef DISASM_H
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#define DISASM_H
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#include "dis-asm.h"
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#define DISASSEMBLY_SOURCE_DEPRECATED (0x1 << 0)
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#define DISASSEMBLY_RAW_INSN (0x1 << 1)
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#define DISASSEMBLY_OMIT_FNAME (0x1 << 2)
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#define DISASSEMBLY_FILENAME (0x1 << 3)
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#define DISASSEMBLY_OMIT_PC (0x1 << 4)
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#define DISASSEMBLY_SOURCE (0x1 << 5)
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#define DISASSEMBLY_SPECULATIVE (0x1 << 6)
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struct gdbarch;
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struct ui_out;
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struct ui_file;
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/* An instruction to be disassembled. */
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struct disasm_insn
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{
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/* The address of the memory containing the instruction. */
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CORE_ADDR addr;
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/* An optional instruction number. If non-zero, it is printed first. */
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unsigned int number;
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/* True if the instruction was executed speculatively. */
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unsigned int is_speculative:1;
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};
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/* Prints the instruction INSN into UIOUT and returns the length of the
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printed instruction in bytes. */
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extern int gdb_pretty_print_insn (struct gdbarch *gdbarch, struct ui_out *uiout,
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struct disassemble_info * di,
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const struct disasm_insn *insn, int flags,
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struct ui_file *stb);
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/* Return a filled in disassemble_info object for use by gdb. */
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extern struct disassemble_info gdb_disassemble_info (struct gdbarch *gdbarch,
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struct ui_file *file);
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extern void gdb_disassembly (struct gdbarch *gdbarch, struct ui_out *uiout,
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char *file_string, int flags, int how_many,
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CORE_ADDR low, CORE_ADDR high);
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/* Print the instruction at address MEMADDR in debugged memory,
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on STREAM. Returns the length of the instruction, in bytes,
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and, if requested, the number of branch delay slot instructions. */
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extern int gdb_print_insn (struct gdbarch *gdbarch, CORE_ADDR memaddr,
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struct ui_file *stream, int *branch_delay_insns);
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/* Return the length in bytes of the instruction at address MEMADDR in
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debugged memory. */
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extern int gdb_insn_length (struct gdbarch *gdbarch, CORE_ADDR memaddr);
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/* Return the length in bytes of INSN, originally at MEMADDR. MAX_LEN
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is the size of the buffer containing INSN. */
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extern int gdb_buffered_insn_length (struct gdbarch *gdbarch,
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const gdb_byte *insn, int max_len,
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CORE_ADDR memaddr);
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#endif
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