8ea1369558
* auxv.c (target_auxv_search): Delete unused variable. * blockframe.c (get_frame_block): Delete unused variable. * regcache.c (regcache_cpy): Delete unused variable. (regcache_cpy_no_passthrough): Delete unused variable. * charset.c (wchar_iterate): Delete unused variable. (find_charset_names): Delete unused variable. (_initialize_charset): Delete unused variable. * disasm.c (do_mixed_source_and_assembly): Delete unused variable. * source.c (set_default_source_symtab_and_line): Delete unused variable. (set_substitute_path_command): Delete unused variable. * value.c (preserve_values): Delete unused variable. (value_from_double): Delete unused variable.
504 lines
15 KiB
C
504 lines
15 KiB
C
/* Disassemble support for GDB.
|
|
|
|
Copyright (C) 2000, 2001, 2002, 2003, 2004, 2005, 2007, 2008, 2009, 2010
|
|
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/>. */
|
|
|
|
#include "defs.h"
|
|
#include "target.h"
|
|
#include "value.h"
|
|
#include "ui-out.h"
|
|
#include "gdb_string.h"
|
|
#include "disasm.h"
|
|
#include "gdbcore.h"
|
|
#include "dis-asm.h"
|
|
|
|
/* Disassemble functions.
|
|
FIXME: We should get rid of all the duplicate code in gdb that does
|
|
the same thing: disassemble_command() and the gdbtk variation. */
|
|
|
|
/* This Structure is used to store line number information.
|
|
We need a different sort of line table from the normal one cuz we can't
|
|
depend upon implicit line-end pc's for lines to do the
|
|
reordering in this function. */
|
|
|
|
struct dis_line_entry
|
|
{
|
|
int line;
|
|
CORE_ADDR start_pc;
|
|
CORE_ADDR end_pc;
|
|
};
|
|
|
|
/* Like target_read_memory, but slightly different parameters. */
|
|
static int
|
|
dis_asm_read_memory (bfd_vma memaddr, gdb_byte *myaddr, unsigned int len,
|
|
struct disassemble_info *info)
|
|
{
|
|
return target_read_memory (memaddr, myaddr, len);
|
|
}
|
|
|
|
/* Like memory_error with slightly different parameters. */
|
|
static void
|
|
dis_asm_memory_error (int status, bfd_vma memaddr,
|
|
struct disassemble_info *info)
|
|
{
|
|
memory_error (status, memaddr);
|
|
}
|
|
|
|
/* Like print_address with slightly different parameters. */
|
|
static void
|
|
dis_asm_print_address (bfd_vma addr, struct disassemble_info *info)
|
|
{
|
|
struct gdbarch *gdbarch = info->application_data;
|
|
print_address (gdbarch, addr, info->stream);
|
|
}
|
|
|
|
static int
|
|
compare_lines (const void *mle1p, const void *mle2p)
|
|
{
|
|
struct dis_line_entry *mle1, *mle2;
|
|
int val;
|
|
|
|
mle1 = (struct dis_line_entry *) mle1p;
|
|
mle2 = (struct dis_line_entry *) mle2p;
|
|
|
|
val = mle1->line - mle2->line;
|
|
|
|
if (val != 0)
|
|
return val;
|
|
|
|
return mle1->start_pc - mle2->start_pc;
|
|
}
|
|
|
|
static int
|
|
dump_insns (struct gdbarch *gdbarch, struct ui_out *uiout,
|
|
struct disassemble_info * di,
|
|
CORE_ADDR low, CORE_ADDR high,
|
|
int how_many, int flags, struct ui_stream *stb)
|
|
{
|
|
int num_displayed = 0;
|
|
CORE_ADDR pc;
|
|
|
|
/* parts of the symbolic representation of the address */
|
|
int unmapped;
|
|
int offset;
|
|
int line;
|
|
struct cleanup *ui_out_chain;
|
|
|
|
for (pc = low; pc < high;)
|
|
{
|
|
char *filename = NULL;
|
|
char *name = NULL;
|
|
|
|
QUIT;
|
|
if (how_many >= 0)
|
|
{
|
|
if (num_displayed >= how_many)
|
|
break;
|
|
else
|
|
num_displayed++;
|
|
}
|
|
ui_out_chain = make_cleanup_ui_out_tuple_begin_end (uiout, NULL);
|
|
ui_out_text (uiout, pc_prefix (pc));
|
|
ui_out_field_core_addr (uiout, "address", gdbarch, pc);
|
|
|
|
if (!build_address_symbolic (gdbarch, pc, 0, &name, &offset, &filename,
|
|
&line, &unmapped))
|
|
{
|
|
/* We don't care now about line, filename and
|
|
unmapped. But we might in the future. */
|
|
ui_out_text (uiout, " <");
|
|
if ((flags & DISASSEMBLY_OMIT_FNAME) == 0)
|
|
ui_out_field_string (uiout, "func-name", name);
|
|
ui_out_text (uiout, "+");
|
|
ui_out_field_int (uiout, "offset", offset);
|
|
ui_out_text (uiout, ">:\t");
|
|
}
|
|
else
|
|
ui_out_text (uiout, ":\t");
|
|
|
|
if (filename != NULL)
|
|
xfree (filename);
|
|
if (name != NULL)
|
|
xfree (name);
|
|
|
|
ui_file_rewind (stb->stream);
|
|
if (flags & DISASSEMBLY_RAW_INSN)
|
|
{
|
|
CORE_ADDR old_pc = pc;
|
|
bfd_byte data;
|
|
int status;
|
|
pc += gdbarch_print_insn (gdbarch, pc, di);
|
|
for (;old_pc < pc; old_pc++)
|
|
{
|
|
status = (*di->read_memory_func) (old_pc, &data, 1, di);
|
|
if (status != 0)
|
|
(*di->memory_error_func) (status, old_pc, di);
|
|
ui_out_message (uiout, 0, " %02x", (unsigned)data);
|
|
}
|
|
ui_out_text (uiout, "\t");
|
|
}
|
|
else
|
|
pc += gdbarch_print_insn (gdbarch, pc, di);
|
|
ui_out_field_stream (uiout, "inst", stb);
|
|
ui_file_rewind (stb->stream);
|
|
do_cleanups (ui_out_chain);
|
|
ui_out_text (uiout, "\n");
|
|
}
|
|
return num_displayed;
|
|
}
|
|
|
|
/* The idea here is to present a source-O-centric view of a
|
|
function to the user. This means that things are presented
|
|
in source order, with (possibly) out of order assembly
|
|
immediately following. */
|
|
static void
|
|
do_mixed_source_and_assembly (struct gdbarch *gdbarch, struct ui_out *uiout,
|
|
struct disassemble_info *di, int nlines,
|
|
struct linetable_entry *le,
|
|
CORE_ADDR low, CORE_ADDR high,
|
|
struct symtab *symtab,
|
|
int how_many, int flags, struct ui_stream *stb)
|
|
{
|
|
int newlines = 0;
|
|
struct dis_line_entry *mle;
|
|
struct symtab_and_line sal;
|
|
int i;
|
|
int out_of_order = 0;
|
|
int next_line = 0;
|
|
int num_displayed = 0;
|
|
struct cleanup *ui_out_chain;
|
|
struct cleanup *ui_out_tuple_chain = make_cleanup (null_cleanup, 0);
|
|
struct cleanup *ui_out_list_chain = make_cleanup (null_cleanup, 0);
|
|
|
|
mle = (struct dis_line_entry *) alloca (nlines
|
|
* sizeof (struct dis_line_entry));
|
|
|
|
/* Copy linetable entries for this function into our data
|
|
structure, creating end_pc's and setting out_of_order as
|
|
appropriate. */
|
|
|
|
/* First, skip all the preceding functions. */
|
|
|
|
for (i = 0; i < nlines - 1 && le[i].pc < low; i++);
|
|
|
|
/* Now, copy all entries before the end of this function. */
|
|
|
|
for (; i < nlines - 1 && le[i].pc < high; i++)
|
|
{
|
|
if (le[i].line == le[i + 1].line && le[i].pc == le[i + 1].pc)
|
|
continue; /* Ignore duplicates */
|
|
|
|
/* Skip any end-of-function markers. */
|
|
if (le[i].line == 0)
|
|
continue;
|
|
|
|
mle[newlines].line = le[i].line;
|
|
if (le[i].line > le[i + 1].line)
|
|
out_of_order = 1;
|
|
mle[newlines].start_pc = le[i].pc;
|
|
mle[newlines].end_pc = le[i + 1].pc;
|
|
newlines++;
|
|
}
|
|
|
|
/* If we're on the last line, and it's part of the function,
|
|
then we need to get the end pc in a special way. */
|
|
|
|
if (i == nlines - 1 && le[i].pc < high)
|
|
{
|
|
mle[newlines].line = le[i].line;
|
|
mle[newlines].start_pc = le[i].pc;
|
|
sal = find_pc_line (le[i].pc, 0);
|
|
mle[newlines].end_pc = sal.end;
|
|
newlines++;
|
|
}
|
|
|
|
/* Now, sort mle by line #s (and, then by addresses within
|
|
lines). */
|
|
|
|
if (out_of_order)
|
|
qsort (mle, newlines, sizeof (struct dis_line_entry), compare_lines);
|
|
|
|
/* Now, for each line entry, emit the specified lines (unless
|
|
they have been emitted before), followed by the assembly code
|
|
for that line. */
|
|
|
|
ui_out_chain = make_cleanup_ui_out_list_begin_end (uiout, "asm_insns");
|
|
|
|
for (i = 0; i < newlines; i++)
|
|
{
|
|
/* Print out everything from next_line to the current line. */
|
|
if (mle[i].line >= next_line)
|
|
{
|
|
if (next_line != 0)
|
|
{
|
|
/* Just one line to print. */
|
|
if (next_line == mle[i].line)
|
|
{
|
|
ui_out_tuple_chain
|
|
= make_cleanup_ui_out_tuple_begin_end (uiout,
|
|
"src_and_asm_line");
|
|
print_source_lines (symtab, next_line, mle[i].line + 1, 0);
|
|
}
|
|
else
|
|
{
|
|
/* Several source lines w/o asm instructions associated. */
|
|
for (; next_line < mle[i].line; next_line++)
|
|
{
|
|
struct cleanup *ui_out_list_chain_line;
|
|
struct cleanup *ui_out_tuple_chain_line;
|
|
|
|
ui_out_tuple_chain_line
|
|
= make_cleanup_ui_out_tuple_begin_end (uiout,
|
|
"src_and_asm_line");
|
|
print_source_lines (symtab, next_line, next_line + 1,
|
|
0);
|
|
ui_out_list_chain_line
|
|
= make_cleanup_ui_out_list_begin_end (uiout,
|
|
"line_asm_insn");
|
|
do_cleanups (ui_out_list_chain_line);
|
|
do_cleanups (ui_out_tuple_chain_line);
|
|
}
|
|
/* Print the last line and leave list open for
|
|
asm instructions to be added. */
|
|
ui_out_tuple_chain
|
|
= make_cleanup_ui_out_tuple_begin_end (uiout,
|
|
"src_and_asm_line");
|
|
print_source_lines (symtab, next_line, mle[i].line + 1, 0);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
ui_out_tuple_chain
|
|
= make_cleanup_ui_out_tuple_begin_end (uiout, "src_and_asm_line");
|
|
print_source_lines (symtab, mle[i].line, mle[i].line + 1, 0);
|
|
}
|
|
|
|
next_line = mle[i].line + 1;
|
|
ui_out_list_chain
|
|
= make_cleanup_ui_out_list_begin_end (uiout, "line_asm_insn");
|
|
}
|
|
|
|
num_displayed += dump_insns (gdbarch, uiout, di,
|
|
mle[i].start_pc, mle[i].end_pc,
|
|
how_many, flags, stb);
|
|
|
|
/* When we've reached the end of the mle array, or we've seen the last
|
|
assembly range for this source line, close out the list/tuple. */
|
|
if (i == (newlines - 1) || mle[i + 1].line > mle[i].line)
|
|
{
|
|
do_cleanups (ui_out_list_chain);
|
|
do_cleanups (ui_out_tuple_chain);
|
|
ui_out_tuple_chain = make_cleanup (null_cleanup, 0);
|
|
ui_out_list_chain = make_cleanup (null_cleanup, 0);
|
|
ui_out_text (uiout, "\n");
|
|
}
|
|
if (how_many >= 0 && num_displayed >= how_many)
|
|
break;
|
|
}
|
|
do_cleanups (ui_out_chain);
|
|
}
|
|
|
|
|
|
static void
|
|
do_assembly_only (struct gdbarch *gdbarch, struct ui_out *uiout,
|
|
struct disassemble_info * di,
|
|
CORE_ADDR low, CORE_ADDR high,
|
|
int how_many, int flags, struct ui_stream *stb)
|
|
{
|
|
int num_displayed = 0;
|
|
struct cleanup *ui_out_chain;
|
|
|
|
ui_out_chain = make_cleanup_ui_out_list_begin_end (uiout, "asm_insns");
|
|
|
|
num_displayed = dump_insns (gdbarch, uiout, di, low, high, how_many,
|
|
flags, stb);
|
|
|
|
do_cleanups (ui_out_chain);
|
|
}
|
|
|
|
/* 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 (stream, format, args);
|
|
va_end (args);
|
|
/* Something non -ve. */
|
|
return 0;
|
|
}
|
|
|
|
static struct disassemble_info
|
|
gdb_disassemble_info (struct gdbarch *gdbarch, struct ui_file *file)
|
|
{
|
|
struct disassemble_info di;
|
|
init_disassemble_info (&di, file, fprintf_disasm);
|
|
di.flavour = bfd_target_unknown_flavour;
|
|
di.memory_error_func = dis_asm_memory_error;
|
|
di.print_address_func = dis_asm_print_address;
|
|
/* NOTE: cagney/2003-04-28: The original code, from the old Insight
|
|
disassembler had a local optomization 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 supperseeded by trust-read-only-sections
|
|
(although that should be superseeded by target_trust..._p()). */
|
|
di.read_memory_func = dis_asm_read_memory;
|
|
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);
|
|
di.application_data = gdbarch;
|
|
disassemble_init_for_target (&di);
|
|
return di;
|
|
}
|
|
|
|
void
|
|
gdb_disassembly (struct gdbarch *gdbarch, struct ui_out *uiout,
|
|
char *file_string, int flags, int how_many,
|
|
CORE_ADDR low, CORE_ADDR high)
|
|
{
|
|
struct ui_stream *stb = ui_out_stream_new (uiout);
|
|
struct cleanup *cleanups = make_cleanup_ui_out_stream_delete (stb);
|
|
struct disassemble_info di = gdb_disassemble_info (gdbarch, stb->stream);
|
|
/* To collect the instruction outputted from opcodes. */
|
|
struct symtab *symtab = NULL;
|
|
struct linetable_entry *le = NULL;
|
|
int nlines = -1;
|
|
|
|
/* Assume symtab is valid for whole PC range */
|
|
symtab = find_pc_symtab (low);
|
|
|
|
if (symtab != NULL && symtab->linetable != NULL)
|
|
{
|
|
/* Convert the linetable to a bunch of my_line_entry's. */
|
|
le = symtab->linetable->item;
|
|
nlines = symtab->linetable->nitems;
|
|
}
|
|
|
|
if (!(flags & DISASSEMBLY_SOURCE) || nlines <= 0
|
|
|| symtab == NULL || symtab->linetable == NULL)
|
|
do_assembly_only (gdbarch, uiout, &di, low, high, how_many, flags, stb);
|
|
|
|
else if (flags & DISASSEMBLY_SOURCE)
|
|
do_mixed_source_and_assembly (gdbarch, uiout, &di, nlines, le, low,
|
|
high, symtab, how_many, flags, stb);
|
|
|
|
do_cleanups (cleanups);
|
|
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)
|
|
{
|
|
struct disassemble_info di;
|
|
int length;
|
|
|
|
di = gdb_disassemble_info (gdbarch, stream);
|
|
length = gdbarch_print_insn (gdbarch, memaddr, &di);
|
|
if (branch_delay_insns)
|
|
{
|
|
if (di.insn_info_valid)
|
|
*branch_delay_insns = di.branch_delay_insns;
|
|
else
|
|
*branch_delay_insns = 0;
|
|
}
|
|
return length;
|
|
}
|
|
|
|
static void
|
|
do_ui_file_delete (void *arg)
|
|
{
|
|
ui_file_delete (arg);
|
|
}
|
|
|
|
/* Return the length in bytes of the instruction at address MEMADDR in
|
|
debugged memory. */
|
|
|
|
int
|
|
gdb_insn_length (struct gdbarch *gdbarch, CORE_ADDR addr)
|
|
{
|
|
static struct ui_file *null_stream = NULL;
|
|
|
|
/* Dummy file descriptor for the disassembler. */
|
|
if (!null_stream)
|
|
{
|
|
null_stream = ui_file_new ();
|
|
make_final_cleanup (do_ui_file_delete, null_stream);
|
|
}
|
|
|
|
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. */
|
|
|
|
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)
|
|
{
|
|
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);
|
|
|
|
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;
|
|
|
|
gdb_buffered_insn_length_init_dis (gdbarch, &di, insn, max_len, addr);
|
|
|
|
return gdbarch_print_insn (gdbarch, addr, &di);
|
|
}
|