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1156 lines
32 KiB
C
1156 lines
32 KiB
C
/* Disassemble support for GDB.
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Copyright (C) 2000-2021 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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#include "defs.h"
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#include "arch-utils.h"
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#include "target.h"
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#include "value.h"
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#include "ui-out.h"
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#include "disasm.h"
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#include "gdbcore.h"
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#include "gdbcmd.h"
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#include "dis-asm.h"
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#include "source.h"
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#include "safe-ctype.h"
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#include <algorithm>
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#include "gdbsupport/gdb_optional.h"
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#include "valprint.h"
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#include "cli/cli-style.h"
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/* Disassemble functions.
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FIXME: We should get rid of all the duplicate code in gdb that does
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the same thing: disassemble_command() and the gdbtk variation. */
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/* This variable is used to hold the prospective disassembler_options value
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which is set by the "set disassembler_options" command. */
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static char *prospective_options = NULL;
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/* This structure is used to store line number information for the
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deprecated /m option.
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We need a different sort of line table from the normal one cuz we can't
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depend upon implicit line-end pc's for lines to do the
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reordering in this function. */
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struct deprecated_dis_line_entry
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{
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int line;
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CORE_ADDR start_pc;
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CORE_ADDR end_pc;
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};
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/* This Structure is used to store line number information.
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We need a different sort of line table from the normal one cuz we can't
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depend upon implicit line-end pc's for lines to do the
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reordering in this function. */
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struct dis_line_entry
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{
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struct symtab *symtab;
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int line;
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};
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/* Hash function for dis_line_entry. */
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static hashval_t
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hash_dis_line_entry (const void *item)
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{
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const struct dis_line_entry *dle = (const struct dis_line_entry *) item;
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return htab_hash_pointer (dle->symtab) + dle->line;
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}
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/* Equal function for dis_line_entry. */
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static int
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eq_dis_line_entry (const void *item_lhs, const void *item_rhs)
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{
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const struct dis_line_entry *lhs = (const struct dis_line_entry *) item_lhs;
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const struct dis_line_entry *rhs = (const struct dis_line_entry *) item_rhs;
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return (lhs->symtab == rhs->symtab
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&& lhs->line == rhs->line);
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}
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/* Create the table to manage lines for mixed source/disassembly. */
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static htab_t
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allocate_dis_line_table (void)
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{
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return htab_create_alloc (41,
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hash_dis_line_entry, eq_dis_line_entry,
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xfree, xcalloc, xfree);
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}
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/* Add a new dis_line_entry containing SYMTAB and LINE to TABLE. */
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static void
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add_dis_line_entry (htab_t table, struct symtab *symtab, int line)
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{
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void **slot;
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struct dis_line_entry dle, *dlep;
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dle.symtab = symtab;
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dle.line = line;
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slot = htab_find_slot (table, &dle, INSERT);
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if (*slot == NULL)
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{
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dlep = XNEW (struct dis_line_entry);
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dlep->symtab = symtab;
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dlep->line = line;
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*slot = dlep;
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}
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}
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/* Return non-zero if SYMTAB, LINE are in TABLE. */
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static int
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line_has_code_p (htab_t table, struct symtab *symtab, int line)
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{
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struct dis_line_entry dle;
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dle.symtab = symtab;
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dle.line = line;
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return htab_find (table, &dle) != NULL;
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}
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/* Wrapper of target_read_code. */
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int
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gdb_disassembler::dis_asm_read_memory (bfd_vma memaddr, gdb_byte *myaddr,
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unsigned int len,
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struct disassemble_info *info)
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{
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return target_read_code (memaddr, myaddr, len);
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}
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/* Wrapper of memory_error. */
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void
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gdb_disassembler::dis_asm_memory_error (int err, bfd_vma memaddr,
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struct disassemble_info *info)
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{
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gdb_disassembler *self
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= static_cast<gdb_disassembler *>(info->application_data);
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self->m_err_memaddr = memaddr;
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}
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/* Wrapper of print_address. */
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void
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gdb_disassembler::dis_asm_print_address (bfd_vma addr,
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struct disassemble_info *info)
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{
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gdb_disassembler *self
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= static_cast<gdb_disassembler *>(info->application_data);
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print_address (self->arch (), addr, self->stream ());
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}
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static bool
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line_is_less_than (const deprecated_dis_line_entry &mle1,
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const deprecated_dis_line_entry &mle2)
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{
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bool val;
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/* End of sequence markers have a line number of 0 but don't want to
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be sorted to the head of the list, instead sort by PC. */
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if (mle1.line == 0 || mle2.line == 0)
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{
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if (mle1.start_pc != mle2.start_pc)
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val = mle1.start_pc < mle2.start_pc;
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else
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val = mle1.line < mle2.line;
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}
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else
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{
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if (mle1.line != mle2.line)
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val = mle1.line < mle2.line;
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else
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val = mle1.start_pc < mle2.start_pc;
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}
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return val;
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}
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/* See disasm.h. */
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int
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gdb_pretty_print_disassembler::pretty_print_insn (const struct disasm_insn *insn,
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gdb_disassembly_flags flags)
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{
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/* parts of the symbolic representation of the address */
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int unmapped;
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int offset;
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int line;
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int size;
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CORE_ADDR pc;
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struct gdbarch *gdbarch = arch ();
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{
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ui_out_emit_tuple tuple_emitter (m_uiout, NULL);
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pc = insn->addr;
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if (insn->number != 0)
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{
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m_uiout->field_unsigned ("insn-number", insn->number);
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m_uiout->text ("\t");
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}
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if ((flags & DISASSEMBLY_SPECULATIVE) != 0)
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{
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if (insn->is_speculative)
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{
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m_uiout->field_string ("is-speculative", "?");
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/* The speculative execution indication overwrites the first
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character of the PC prefix.
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We assume a PC prefix length of 3 characters. */
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if ((flags & DISASSEMBLY_OMIT_PC) == 0)
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m_uiout->text (pc_prefix (pc) + 1);
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else
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m_uiout->text (" ");
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}
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else if ((flags & DISASSEMBLY_OMIT_PC) == 0)
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m_uiout->text (pc_prefix (pc));
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else
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m_uiout->text (" ");
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}
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else if ((flags & DISASSEMBLY_OMIT_PC) == 0)
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m_uiout->text (pc_prefix (pc));
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m_uiout->field_core_addr ("address", gdbarch, pc);
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std::string name, filename;
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bool omit_fname = ((flags & DISASSEMBLY_OMIT_FNAME) != 0);
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if (!build_address_symbolic (gdbarch, pc, false, omit_fname, &name,
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&offset, &filename, &line, &unmapped))
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{
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/* We don't care now about line, filename and unmapped. But we might in
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the future. */
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m_uiout->text (" <");
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if (!omit_fname)
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m_uiout->field_string ("func-name", name.c_str (),
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function_name_style.style ());
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/* For negative offsets, avoid displaying them as +-N; the sign of
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the offset takes the place of the "+" here. */
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if (offset >= 0)
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m_uiout->text ("+");
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m_uiout->field_signed ("offset", offset);
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m_uiout->text (">:\t");
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}
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else
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m_uiout->text (":\t");
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m_insn_stb.clear ();
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if (flags & DISASSEMBLY_RAW_INSN)
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{
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CORE_ADDR end_pc;
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bfd_byte data;
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const char *spacer = "";
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/* Build the opcodes using a temporary stream so we can
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write them out in a single go for the MI. */
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m_opcode_stb.clear ();
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size = m_di.print_insn (pc);
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end_pc = pc + size;
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for (;pc < end_pc; ++pc)
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{
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read_code (pc, &data, 1);
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m_opcode_stb.printf ("%s%02x", spacer, (unsigned) data);
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spacer = " ";
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}
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m_uiout->field_stream ("opcodes", m_opcode_stb);
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m_uiout->text ("\t");
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}
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else
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size = m_di.print_insn (pc);
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m_uiout->field_stream ("inst", m_insn_stb);
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}
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m_uiout->text ("\n");
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return size;
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}
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static int
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dump_insns (struct gdbarch *gdbarch,
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struct ui_out *uiout, CORE_ADDR low, CORE_ADDR high,
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int how_many, gdb_disassembly_flags flags, CORE_ADDR *end_pc)
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{
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struct disasm_insn insn;
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int num_displayed = 0;
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memset (&insn, 0, sizeof (insn));
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insn.addr = low;
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gdb_pretty_print_disassembler disasm (gdbarch, uiout);
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while (insn.addr < high && (how_many < 0 || num_displayed < how_many))
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{
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int size;
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size = disasm.pretty_print_insn (&insn, flags);
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if (size <= 0)
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break;
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++num_displayed;
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insn.addr += size;
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/* Allow user to bail out with ^C. */
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QUIT;
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}
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if (end_pc != NULL)
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*end_pc = insn.addr;
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return num_displayed;
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}
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/* The idea here is to present a source-O-centric view of a
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function to the user. This means that things are presented
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in source order, with (possibly) out of order assembly
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immediately following.
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N.B. This view is deprecated. */
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static void
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do_mixed_source_and_assembly_deprecated
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(struct gdbarch *gdbarch, struct ui_out *uiout,
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struct symtab *symtab,
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CORE_ADDR low, CORE_ADDR high,
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int how_many, gdb_disassembly_flags flags)
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{
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int newlines = 0;
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int nlines;
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struct linetable_entry *le;
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struct deprecated_dis_line_entry *mle;
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struct symtab_and_line sal;
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int i;
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int out_of_order = 0;
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int next_line = 0;
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int num_displayed = 0;
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print_source_lines_flags psl_flags = 0;
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gdb_assert (symtab != NULL && SYMTAB_LINETABLE (symtab) != NULL);
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nlines = SYMTAB_LINETABLE (symtab)->nitems;
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le = SYMTAB_LINETABLE (symtab)->item;
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if (flags & DISASSEMBLY_FILENAME)
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psl_flags |= PRINT_SOURCE_LINES_FILENAME;
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mle = (struct deprecated_dis_line_entry *)
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alloca (nlines * sizeof (struct deprecated_dis_line_entry));
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/* Copy linetable entries for this function into our data
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structure, creating end_pc's and setting out_of_order as
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appropriate. */
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/* First, skip all the preceding functions. */
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for (i = 0; i < nlines - 1 && le[i].pc < low; i++);
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/* Now, copy all entries before the end of this function. */
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for (; i < nlines - 1 && le[i].pc < high; i++)
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{
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if (le[i].line == le[i + 1].line && le[i].pc == le[i + 1].pc)
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continue; /* Ignore duplicates. */
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/* Skip any end-of-function markers. */
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if (le[i].line == 0)
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continue;
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mle[newlines].line = le[i].line;
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if (le[i].line > le[i + 1].line)
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out_of_order = 1;
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mle[newlines].start_pc = le[i].pc;
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mle[newlines].end_pc = le[i + 1].pc;
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newlines++;
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}
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/* If we're on the last line, and it's part of the function,
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then we need to get the end pc in a special way. */
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if (i == nlines - 1 && le[i].pc < high)
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{
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mle[newlines].line = le[i].line;
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mle[newlines].start_pc = le[i].pc;
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sal = find_pc_line (le[i].pc, 0);
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mle[newlines].end_pc = sal.end;
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newlines++;
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}
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/* Now, sort mle by line #s (and, then by addresses within lines). */
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if (out_of_order)
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std::sort (mle, mle + newlines, line_is_less_than);
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/* Now, for each line entry, emit the specified lines (unless
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they have been emitted before), followed by the assembly code
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for that line. */
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ui_out_emit_list asm_insns_list (uiout, "asm_insns");
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gdb::optional<ui_out_emit_tuple> outer_tuple_emitter;
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gdb::optional<ui_out_emit_list> inner_list_emitter;
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for (i = 0; i < newlines; i++)
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{
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/* Print out everything from next_line to the current line. */
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if (mle[i].line >= next_line)
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{
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if (next_line != 0)
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{
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/* Just one line to print. */
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if (next_line == mle[i].line)
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{
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outer_tuple_emitter.emplace (uiout, "src_and_asm_line");
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print_source_lines (symtab, next_line, mle[i].line + 1, psl_flags);
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}
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else
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{
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/* Several source lines w/o asm instructions associated. */
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for (; next_line < mle[i].line; next_line++)
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{
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ui_out_emit_tuple tuple_emitter (uiout,
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"src_and_asm_line");
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print_source_lines (symtab, next_line, next_line + 1,
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psl_flags);
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ui_out_emit_list temp_list_emitter (uiout,
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"line_asm_insn");
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}
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/* Print the last line and leave list open for
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asm instructions to be added. */
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outer_tuple_emitter.emplace (uiout, "src_and_asm_line");
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print_source_lines (symtab, next_line, mle[i].line + 1, psl_flags);
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}
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}
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else
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{
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outer_tuple_emitter.emplace (uiout, "src_and_asm_line");
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print_source_lines (symtab, mle[i].line, mle[i].line + 1, psl_flags);
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}
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next_line = mle[i].line + 1;
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inner_list_emitter.emplace (uiout, "line_asm_insn");
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}
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num_displayed += dump_insns (gdbarch, uiout,
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mle[i].start_pc, mle[i].end_pc,
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how_many, flags, NULL);
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/* When we've reached the end of the mle array, or we've seen the last
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assembly range for this source line, close out the list/tuple. */
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if (i == (newlines - 1) || mle[i + 1].line > mle[i].line)
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{
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inner_list_emitter.reset ();
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outer_tuple_emitter.reset ();
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uiout->text ("\n");
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}
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if (how_many >= 0 && num_displayed >= how_many)
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break;
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}
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}
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/* The idea here is to present a source-O-centric view of a
|
|
function to the user. This means that things are presented
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|
in source order, with (possibly) out of order assembly
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|
immediately following. */
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static void
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do_mixed_source_and_assembly (struct gdbarch *gdbarch,
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struct ui_out *uiout,
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struct symtab *main_symtab,
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CORE_ADDR low, CORE_ADDR high,
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int how_many, gdb_disassembly_flags flags)
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{
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const struct linetable_entry *le, *first_le;
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int i, nlines;
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int num_displayed = 0;
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print_source_lines_flags psl_flags = 0;
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CORE_ADDR pc;
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struct symtab *last_symtab;
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int last_line;
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gdb_assert (main_symtab != NULL && SYMTAB_LINETABLE (main_symtab) != NULL);
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/* First pass: collect the list of all source files and lines.
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We do this so that we can only print lines containing code once.
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We try to print the source text leading up to the next instruction,
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but if that text is for code that will be disassembled later, then
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we'll want to defer printing it until later with its associated code. */
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htab_up dis_line_table (allocate_dis_line_table ());
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pc = low;
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/* The prologue may be empty, but there may still be a line number entry
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for the opening brace which is distinct from the first line of code.
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If the prologue has been eliminated find_pc_line may return the source
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|
line after the opening brace. We still want to print this opening brace.
|
|
first_le is used to implement this. */
|
|
|
|
nlines = SYMTAB_LINETABLE (main_symtab)->nitems;
|
|
le = SYMTAB_LINETABLE (main_symtab)->item;
|
|
first_le = NULL;
|
|
|
|
/* Skip all the preceding functions. */
|
|
for (i = 0; i < nlines && le[i].pc < low; i++)
|
|
continue;
|
|
|
|
if (i < nlines && le[i].pc < high)
|
|
first_le = &le[i];
|
|
|
|
/* Add lines for every pc value. */
|
|
while (pc < high)
|
|
{
|
|
struct symtab_and_line sal;
|
|
int length;
|
|
|
|
sal = find_pc_line (pc, 0);
|
|
length = gdb_insn_length (gdbarch, pc);
|
|
pc += length;
|
|
|
|
if (sal.symtab != NULL)
|
|
add_dis_line_entry (dis_line_table.get (), sal.symtab, sal.line);
|
|
}
|
|
|
|
/* Second pass: print the disassembly.
|
|
|
|
Output format, from an MI perspective:
|
|
The result is a ui_out list, field name "asm_insns", where elements have
|
|
name "src_and_asm_line".
|
|
Each element is a tuple of source line specs (field names line, file,
|
|
fullname), and field "line_asm_insn" which contains the disassembly.
|
|
Field "line_asm_insn" is a list of tuples: address, func-name, offset,
|
|
opcodes, inst.
|
|
|
|
CLI output works on top of this because MI ignores ui_out_text output,
|
|
which is where we put file name and source line contents output.
|
|
|
|
Emitter usage:
|
|
asm_insns_emitter
|
|
Handles the outer "asm_insns" list.
|
|
tuple_emitter
|
|
The tuples for each group of consecutive disassemblies.
|
|
list_emitter
|
|
List of consecutive source lines or disassembled insns. */
|
|
|
|
if (flags & DISASSEMBLY_FILENAME)
|
|
psl_flags |= PRINT_SOURCE_LINES_FILENAME;
|
|
|
|
ui_out_emit_list asm_insns_emitter (uiout, "asm_insns");
|
|
|
|
gdb::optional<ui_out_emit_tuple> tuple_emitter;
|
|
gdb::optional<ui_out_emit_list> list_emitter;
|
|
|
|
last_symtab = NULL;
|
|
last_line = 0;
|
|
pc = low;
|
|
|
|
while (pc < high)
|
|
{
|
|
struct symtab_and_line sal;
|
|
CORE_ADDR end_pc;
|
|
int start_preceding_line_to_display = 0;
|
|
int end_preceding_line_to_display = 0;
|
|
int new_source_line = 0;
|
|
|
|
sal = find_pc_line (pc, 0);
|
|
|
|
if (sal.symtab != last_symtab)
|
|
{
|
|
/* New source file. */
|
|
new_source_line = 1;
|
|
|
|
/* If this is the first line of output, check for any preceding
|
|
lines. */
|
|
if (last_line == 0
|
|
&& first_le != NULL
|
|
&& first_le->line < sal.line)
|
|
{
|
|
start_preceding_line_to_display = first_le->line;
|
|
end_preceding_line_to_display = sal.line;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
/* Same source file as last time. */
|
|
if (sal.symtab != NULL)
|
|
{
|
|
if (sal.line > last_line + 1 && last_line != 0)
|
|
{
|
|
int l;
|
|
|
|
/* Several preceding source lines. Print the trailing ones
|
|
not associated with code that we'll print later. */
|
|
for (l = sal.line - 1; l > last_line; --l)
|
|
{
|
|
if (line_has_code_p (dis_line_table.get (),
|
|
sal.symtab, l))
|
|
break;
|
|
}
|
|
if (l < sal.line - 1)
|
|
{
|
|
start_preceding_line_to_display = l + 1;
|
|
end_preceding_line_to_display = sal.line;
|
|
}
|
|
}
|
|
if (sal.line != last_line)
|
|
new_source_line = 1;
|
|
else
|
|
{
|
|
/* Same source line as last time. This can happen, depending
|
|
on the debug info. */
|
|
}
|
|
}
|
|
}
|
|
|
|
if (new_source_line)
|
|
{
|
|
/* Skip the newline if this is the first instruction. */
|
|
if (pc > low)
|
|
uiout->text ("\n");
|
|
if (tuple_emitter.has_value ())
|
|
{
|
|
gdb_assert (list_emitter.has_value ());
|
|
list_emitter.reset ();
|
|
tuple_emitter.reset ();
|
|
}
|
|
if (sal.symtab != last_symtab
|
|
&& !(flags & DISASSEMBLY_FILENAME))
|
|
{
|
|
/* Remember MI ignores ui_out_text.
|
|
We don't have to do anything here for MI because MI
|
|
output includes the source specs for each line. */
|
|
if (sal.symtab != NULL)
|
|
{
|
|
uiout->text (symtab_to_filename_for_display (sal.symtab));
|
|
}
|
|
else
|
|
uiout->text ("unknown");
|
|
uiout->text (":\n");
|
|
}
|
|
if (start_preceding_line_to_display > 0)
|
|
{
|
|
/* Several source lines w/o asm instructions associated.
|
|
We need to preserve the structure of the output, so output
|
|
a bunch of line tuples with no asm entries. */
|
|
int l;
|
|
|
|
gdb_assert (sal.symtab != NULL);
|
|
for (l = start_preceding_line_to_display;
|
|
l < end_preceding_line_to_display;
|
|
++l)
|
|
{
|
|
ui_out_emit_tuple line_tuple_emitter (uiout,
|
|
"src_and_asm_line");
|
|
print_source_lines (sal.symtab, l, l + 1, psl_flags);
|
|
ui_out_emit_list chain_line_emitter (uiout, "line_asm_insn");
|
|
}
|
|
}
|
|
tuple_emitter.emplace (uiout, "src_and_asm_line");
|
|
if (sal.symtab != NULL)
|
|
print_source_lines (sal.symtab, sal.line, sal.line + 1, psl_flags);
|
|
else
|
|
uiout->text (_("--- no source info for this pc ---\n"));
|
|
list_emitter.emplace (uiout, "line_asm_insn");
|
|
}
|
|
else
|
|
{
|
|
/* Here we're appending instructions to an existing line.
|
|
By construction the very first insn will have a symtab
|
|
and follow the new_source_line path above. */
|
|
gdb_assert (tuple_emitter.has_value ());
|
|
gdb_assert (list_emitter.has_value ());
|
|
}
|
|
|
|
if (sal.end != 0)
|
|
end_pc = std::min (sal.end, high);
|
|
else
|
|
end_pc = pc + 1;
|
|
num_displayed += dump_insns (gdbarch, uiout, pc, end_pc,
|
|
how_many, flags, &end_pc);
|
|
pc = end_pc;
|
|
|
|
if (how_many >= 0 && num_displayed >= how_many)
|
|
break;
|
|
|
|
last_symtab = sal.symtab;
|
|
last_line = sal.line;
|
|
}
|
|
}
|
|
|
|
static void
|
|
do_assembly_only (struct gdbarch *gdbarch, struct ui_out *uiout,
|
|
CORE_ADDR low, CORE_ADDR high,
|
|
int how_many, gdb_disassembly_flags flags)
|
|
{
|
|
ui_out_emit_list list_emitter (uiout, "asm_insns");
|
|
|
|
dump_insns (gdbarch, uiout, low, high, how_many, flags, NULL);
|
|
}
|
|
|
|
/* Initialize the disassemble info struct ready for the specified
|
|
stream. */
|
|
|
|
static int ATTRIBUTE_PRINTF (2, 3)
|
|
fprintf_disasm (void *stream, const char *format, ...)
|
|
{
|
|
va_list args;
|
|
|
|
va_start (args, format);
|
|
vfprintf_filtered ((struct ui_file *) stream, format, args);
|
|
va_end (args);
|
|
/* Something non -ve. */
|
|
return 0;
|
|
}
|
|
|
|
/* Combine implicit and user disassembler options and return them
|
|
in a newly-created string. */
|
|
|
|
static std::string
|
|
get_all_disassembler_options (struct gdbarch *gdbarch)
|
|
{
|
|
const char *implicit = gdbarch_disassembler_options_implicit (gdbarch);
|
|
const char *options = get_disassembler_options (gdbarch);
|
|
const char *comma = ",";
|
|
|
|
if (implicit == nullptr)
|
|
{
|
|
implicit = "";
|
|
comma = "";
|
|
}
|
|
|
|
if (options == nullptr)
|
|
{
|
|
options = "";
|
|
comma = "";
|
|
}
|
|
|
|
return string_printf ("%s%s%s", implicit, comma, options);
|
|
}
|
|
|
|
gdb_disassembler::gdb_disassembler (struct gdbarch *gdbarch,
|
|
struct ui_file *file,
|
|
di_read_memory_ftype read_memory_func)
|
|
: m_gdbarch (gdbarch),
|
|
m_err_memaddr (0)
|
|
{
|
|
init_disassemble_info (&m_di, file, fprintf_disasm);
|
|
m_di.flavour = bfd_target_unknown_flavour;
|
|
m_di.memory_error_func = dis_asm_memory_error;
|
|
m_di.print_address_func = dis_asm_print_address;
|
|
/* NOTE: cagney/2003-04-28: The original code, from the old Insight
|
|
disassembler had a local optimization here. By default it would
|
|
access the executable file, instead of the target memory (there
|
|
was a growing list of exceptions though). Unfortunately, the
|
|
heuristic was flawed. Commands like "disassemble &variable"
|
|
didn't work as they relied on the access going to the target.
|
|
Further, it has been superseeded by trust-read-only-sections
|
|
(although that should be superseeded by target_trust..._p()). */
|
|
m_di.read_memory_func = read_memory_func;
|
|
m_di.arch = gdbarch_bfd_arch_info (gdbarch)->arch;
|
|
m_di.mach = gdbarch_bfd_arch_info (gdbarch)->mach;
|
|
m_di.endian = gdbarch_byte_order (gdbarch);
|
|
m_di.endian_code = gdbarch_byte_order_for_code (gdbarch);
|
|
m_di.application_data = this;
|
|
m_disassembler_options_holder = get_all_disassembler_options (gdbarch);
|
|
if (!m_disassembler_options_holder.empty ())
|
|
m_di.disassembler_options = m_disassembler_options_holder.c_str ();
|
|
disassemble_init_for_target (&m_di);
|
|
}
|
|
|
|
gdb_disassembler::~gdb_disassembler ()
|
|
{
|
|
disassemble_free_target (&m_di);
|
|
}
|
|
|
|
int
|
|
gdb_disassembler::print_insn (CORE_ADDR memaddr,
|
|
int *branch_delay_insns)
|
|
{
|
|
m_err_memaddr = 0;
|
|
|
|
int length = gdbarch_print_insn (arch (), memaddr, &m_di);
|
|
|
|
if (length < 0)
|
|
memory_error (TARGET_XFER_E_IO, m_err_memaddr);
|
|
|
|
if (branch_delay_insns != NULL)
|
|
{
|
|
if (m_di.insn_info_valid)
|
|
*branch_delay_insns = m_di.branch_delay_insns;
|
|
else
|
|
*branch_delay_insns = 0;
|
|
}
|
|
return length;
|
|
}
|
|
|
|
void
|
|
gdb_disassembly (struct gdbarch *gdbarch, struct ui_out *uiout,
|
|
gdb_disassembly_flags flags, int how_many,
|
|
CORE_ADDR low, CORE_ADDR high)
|
|
{
|
|
struct symtab *symtab;
|
|
int nlines = -1;
|
|
|
|
/* Assume symtab is valid for whole PC range. */
|
|
symtab = find_pc_line_symtab (low);
|
|
|
|
if (symtab != NULL && SYMTAB_LINETABLE (symtab) != NULL)
|
|
nlines = SYMTAB_LINETABLE (symtab)->nitems;
|
|
|
|
if (!(flags & (DISASSEMBLY_SOURCE_DEPRECATED | DISASSEMBLY_SOURCE))
|
|
|| nlines <= 0)
|
|
do_assembly_only (gdbarch, uiout, low, high, how_many, flags);
|
|
|
|
else if (flags & DISASSEMBLY_SOURCE)
|
|
do_mixed_source_and_assembly (gdbarch, uiout, symtab, low, high,
|
|
how_many, flags);
|
|
|
|
else if (flags & DISASSEMBLY_SOURCE_DEPRECATED)
|
|
do_mixed_source_and_assembly_deprecated (gdbarch, uiout, symtab,
|
|
low, high, how_many, flags);
|
|
|
|
gdb_flush (gdb_stdout);
|
|
}
|
|
|
|
/* 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. */
|
|
|
|
int
|
|
gdb_print_insn (struct gdbarch *gdbarch, CORE_ADDR memaddr,
|
|
struct ui_file *stream, int *branch_delay_insns)
|
|
{
|
|
|
|
gdb_disassembler di (gdbarch, stream);
|
|
|
|
return di.print_insn (memaddr, branch_delay_insns);
|
|
}
|
|
|
|
/* Return the length in bytes of the instruction at address MEMADDR in
|
|
debugged memory. */
|
|
|
|
int
|
|
gdb_insn_length (struct gdbarch *gdbarch, CORE_ADDR addr)
|
|
{
|
|
return gdb_print_insn (gdbarch, addr, &null_stream, NULL);
|
|
}
|
|
|
|
/* fprintf-function for gdb_buffered_insn_length. This function is a
|
|
nop, we don't want to print anything, we just want to compute the
|
|
length of the insn. */
|
|
|
|
static int ATTRIBUTE_PRINTF (2, 3)
|
|
gdb_buffered_insn_length_fprintf (void *stream, const char *format, ...)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
/* Initialize a struct disassemble_info for gdb_buffered_insn_length.
|
|
Upon return, *DISASSEMBLER_OPTIONS_HOLDER owns the string pointed
|
|
to by DI.DISASSEMBLER_OPTIONS. */
|
|
|
|
static void
|
|
gdb_buffered_insn_length_init_dis (struct gdbarch *gdbarch,
|
|
struct disassemble_info *di,
|
|
const gdb_byte *insn, int max_len,
|
|
CORE_ADDR addr,
|
|
std::string *disassembler_options_holder)
|
|
{
|
|
init_disassemble_info (di, NULL, gdb_buffered_insn_length_fprintf);
|
|
|
|
/* init_disassemble_info installs buffer_read_memory, etc.
|
|
so we don't need to do that here.
|
|
The cast is necessary until disassemble_info is const-ified. */
|
|
di->buffer = (gdb_byte *) insn;
|
|
di->buffer_length = max_len;
|
|
di->buffer_vma = addr;
|
|
|
|
di->arch = gdbarch_bfd_arch_info (gdbarch)->arch;
|
|
di->mach = gdbarch_bfd_arch_info (gdbarch)->mach;
|
|
di->endian = gdbarch_byte_order (gdbarch);
|
|
di->endian_code = gdbarch_byte_order_for_code (gdbarch);
|
|
|
|
*disassembler_options_holder = get_all_disassembler_options (gdbarch);
|
|
if (!disassembler_options_holder->empty ())
|
|
di->disassembler_options = disassembler_options_holder->c_str ();
|
|
disassemble_init_for_target (di);
|
|
}
|
|
|
|
/* Return the length in bytes of INSN. MAX_LEN is the size of the
|
|
buffer containing INSN. */
|
|
|
|
int
|
|
gdb_buffered_insn_length (struct gdbarch *gdbarch,
|
|
const gdb_byte *insn, int max_len, CORE_ADDR addr)
|
|
{
|
|
struct disassemble_info di;
|
|
std::string disassembler_options_holder;
|
|
|
|
gdb_buffered_insn_length_init_dis (gdbarch, &di, insn, max_len, addr,
|
|
&disassembler_options_holder);
|
|
|
|
int result = gdbarch_print_insn (gdbarch, addr, &di);
|
|
disassemble_free_target (&di);
|
|
return result;
|
|
}
|
|
|
|
char *
|
|
get_disassembler_options (struct gdbarch *gdbarch)
|
|
{
|
|
char **disassembler_options = gdbarch_disassembler_options (gdbarch);
|
|
if (disassembler_options == NULL)
|
|
return NULL;
|
|
return *disassembler_options;
|
|
}
|
|
|
|
void
|
|
set_disassembler_options (char *prospective_options)
|
|
{
|
|
struct gdbarch *gdbarch = get_current_arch ();
|
|
char **disassembler_options = gdbarch_disassembler_options (gdbarch);
|
|
const disasm_options_and_args_t *valid_options_and_args;
|
|
const disasm_options_t *valid_options;
|
|
char *options = remove_whitespace_and_extra_commas (prospective_options);
|
|
const char *opt;
|
|
|
|
/* Allow all architectures, even ones that do not support 'set disassembler',
|
|
to reset their disassembler options to NULL. */
|
|
if (options == NULL)
|
|
{
|
|
if (disassembler_options != NULL)
|
|
{
|
|
free (*disassembler_options);
|
|
*disassembler_options = NULL;
|
|
}
|
|
return;
|
|
}
|
|
|
|
valid_options_and_args = gdbarch_valid_disassembler_options (gdbarch);
|
|
if (valid_options_and_args == NULL)
|
|
{
|
|
fprintf_filtered (gdb_stderr, _("\
|
|
'set disassembler-options ...' is not supported on this architecture.\n"));
|
|
return;
|
|
}
|
|
|
|
valid_options = &valid_options_and_args->options;
|
|
|
|
/* Verify we have valid disassembler options. */
|
|
FOR_EACH_DISASSEMBLER_OPTION (opt, options)
|
|
{
|
|
size_t i;
|
|
for (i = 0; valid_options->name[i] != NULL; i++)
|
|
if (valid_options->arg != NULL && valid_options->arg[i] != NULL)
|
|
{
|
|
size_t len = strlen (valid_options->name[i]);
|
|
bool found = false;
|
|
const char *arg;
|
|
size_t j;
|
|
|
|
if (memcmp (opt, valid_options->name[i], len) != 0)
|
|
continue;
|
|
arg = opt + len;
|
|
for (j = 0; valid_options->arg[i]->values[j] != NULL; j++)
|
|
if (disassembler_options_cmp
|
|
(arg, valid_options->arg[i]->values[j]) == 0)
|
|
{
|
|
found = true;
|
|
break;
|
|
}
|
|
if (found)
|
|
break;
|
|
}
|
|
else if (disassembler_options_cmp (opt, valid_options->name[i]) == 0)
|
|
break;
|
|
if (valid_options->name[i] == NULL)
|
|
{
|
|
fprintf_filtered (gdb_stderr,
|
|
_("Invalid disassembler option value: '%s'.\n"),
|
|
opt);
|
|
return;
|
|
}
|
|
}
|
|
|
|
free (*disassembler_options);
|
|
*disassembler_options = xstrdup (options);
|
|
}
|
|
|
|
static void
|
|
set_disassembler_options_sfunc (const char *args, int from_tty,
|
|
struct cmd_list_element *c)
|
|
{
|
|
set_disassembler_options (prospective_options);
|
|
}
|
|
|
|
static void
|
|
show_disassembler_options_sfunc (struct ui_file *file, int from_tty,
|
|
struct cmd_list_element *c, const char *value)
|
|
{
|
|
struct gdbarch *gdbarch = get_current_arch ();
|
|
const disasm_options_and_args_t *valid_options_and_args;
|
|
const disasm_option_arg_t *valid_args;
|
|
const disasm_options_t *valid_options;
|
|
|
|
const char *options = get_disassembler_options (gdbarch);
|
|
if (options == NULL)
|
|
options = "";
|
|
|
|
fprintf_filtered (file, _("The current disassembler options are '%s'\n\n"),
|
|
options);
|
|
|
|
valid_options_and_args = gdbarch_valid_disassembler_options (gdbarch);
|
|
|
|
if (valid_options_and_args == NULL)
|
|
{
|
|
fputs_filtered (_("There are no disassembler options available "
|
|
"for this architecture.\n"),
|
|
file);
|
|
return;
|
|
}
|
|
|
|
valid_options = &valid_options_and_args->options;
|
|
|
|
fprintf_filtered (file, _("\
|
|
The following disassembler options are supported for use with the\n\
|
|
'set disassembler-options OPTION [,OPTION]...' command:\n"));
|
|
|
|
if (valid_options->description != NULL)
|
|
{
|
|
size_t i, max_len = 0;
|
|
|
|
fprintf_filtered (file, "\n");
|
|
|
|
/* Compute the length of the longest option name. */
|
|
for (i = 0; valid_options->name[i] != NULL; i++)
|
|
{
|
|
size_t len = strlen (valid_options->name[i]);
|
|
|
|
if (valid_options->arg != NULL && valid_options->arg[i] != NULL)
|
|
len += strlen (valid_options->arg[i]->name);
|
|
if (max_len < len)
|
|
max_len = len;
|
|
}
|
|
|
|
for (i = 0, max_len++; valid_options->name[i] != NULL; i++)
|
|
{
|
|
fprintf_filtered (file, " %s", valid_options->name[i]);
|
|
if (valid_options->arg != NULL && valid_options->arg[i] != NULL)
|
|
fprintf_filtered (file, "%s", valid_options->arg[i]->name);
|
|
if (valid_options->description[i] != NULL)
|
|
{
|
|
size_t len = strlen (valid_options->name[i]);
|
|
|
|
if (valid_options->arg != NULL && valid_options->arg[i] != NULL)
|
|
len += strlen (valid_options->arg[i]->name);
|
|
fprintf_filtered (file, "%*c %s", (int) (max_len - len), ' ',
|
|
valid_options->description[i]);
|
|
}
|
|
fprintf_filtered (file, "\n");
|
|
}
|
|
}
|
|
else
|
|
{
|
|
size_t i;
|
|
fprintf_filtered (file, " ");
|
|
for (i = 0; valid_options->name[i] != NULL; i++)
|
|
{
|
|
fprintf_filtered (file, "%s", valid_options->name[i]);
|
|
if (valid_options->arg != NULL && valid_options->arg[i] != NULL)
|
|
fprintf_filtered (file, "%s", valid_options->arg[i]->name);
|
|
if (valid_options->name[i + 1] != NULL)
|
|
fprintf_filtered (file, ", ");
|
|
wrap_here (" ");
|
|
}
|
|
fprintf_filtered (file, "\n");
|
|
}
|
|
|
|
valid_args = valid_options_and_args->args;
|
|
if (valid_args != NULL)
|
|
{
|
|
size_t i, j;
|
|
|
|
for (i = 0; valid_args[i].name != NULL; i++)
|
|
{
|
|
fprintf_filtered (file, _("\n\
|
|
For the options above, the following values are supported for \"%s\":\n "),
|
|
valid_args[i].name);
|
|
for (j = 0; valid_args[i].values[j] != NULL; j++)
|
|
{
|
|
fprintf_filtered (file, " %s", valid_args[i].values[j]);
|
|
wrap_here (" ");
|
|
}
|
|
fprintf_filtered (file, "\n");
|
|
}
|
|
}
|
|
}
|
|
|
|
/* A completion function for "set disassembler". */
|
|
|
|
static void
|
|
disassembler_options_completer (struct cmd_list_element *ignore,
|
|
completion_tracker &tracker,
|
|
const char *text, const char *word)
|
|
{
|
|
struct gdbarch *gdbarch = get_current_arch ();
|
|
const disasm_options_and_args_t *opts_and_args
|
|
= gdbarch_valid_disassembler_options (gdbarch);
|
|
|
|
if (opts_and_args != NULL)
|
|
{
|
|
const disasm_options_t *opts = &opts_and_args->options;
|
|
|
|
/* Only attempt to complete on the last option text. */
|
|
const char *separator = strrchr (text, ',');
|
|
if (separator != NULL)
|
|
text = separator + 1;
|
|
text = skip_spaces (text);
|
|
complete_on_enum (tracker, opts->name, text, word);
|
|
}
|
|
}
|
|
|
|
|
|
/* Initialization code. */
|
|
|
|
void _initialize_disasm ();
|
|
void
|
|
_initialize_disasm ()
|
|
{
|
|
struct cmd_list_element *cmd;
|
|
|
|
/* Add the command that controls the disassembler options. */
|
|
cmd = add_setshow_string_noescape_cmd ("disassembler-options", no_class,
|
|
&prospective_options, _("\
|
|
Set the disassembler options.\n\
|
|
Usage: set disassembler-options OPTION [,OPTION]...\n\n\
|
|
See: 'show disassembler-options' for valid option values."), _("\
|
|
Show the disassembler options."), NULL,
|
|
set_disassembler_options_sfunc,
|
|
show_disassembler_options_sfunc,
|
|
&setlist, &showlist);
|
|
set_cmd_completer (cmd, disassembler_options_completer);
|
|
}
|