/* addr2line.c -- convert addresses to line number and function name
Copyright (C) 1997-2020 Free Software Foundation, Inc.
Contributed by Ulrich Lauther <Ulrich.Lauther@mchp.siemens.de>
This file is part of GNU Binutils.
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, 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, write to the Free Software
Foundation, 51 Franklin Street - Fifth Floor, Boston,
MA 02110-1301, USA. */
/* Derived from objdump.c and nm.c by Ulrich.Lauther@mchp.siemens.de
Usage:
addr2line [options] addr addr ...
or
addr2line [options]
both forms write results to stdout, the second form reads addresses
to be converted from stdin. */
#include "sysdep.h"
#include "bfd.h"
#include "getopt.h"
#include "libiberty.h"
#include "demangle.h"
#include "bucomm.h"
#include "elf-bfd.h"
static bfd_boolean unwind_inlines; /* -i, unwind inlined functions. */
static bfd_boolean with_addresses; /* -a, show addresses. */
static bfd_boolean with_functions; /* -f, show function names. */
static bfd_boolean do_demangle; /* -C, demangle names. */
static bfd_boolean pretty_print; /* -p, print on one line. */
static bfd_boolean base_names; /* -s, strip directory names. */
/* Flags passed to the name demangler. */
static int demangle_flags = DMGL_PARAMS | DMGL_ANSI;
static int naddr; /* Number of addresses to process. */
static char **addr; /* Hex addresses to process. */
static asymbol **syms; /* Symbol table. */
static struct option long_options[] =
{
{"addresses", no_argument, NULL, 'a'},
{"basenames", no_argument, NULL, 's'},
{"demangle", optional_argument, NULL, 'C'},
{"exe", required_argument, NULL, 'e'},
{"functions", no_argument, NULL, 'f'},
{"inlines", no_argument, NULL, 'i'},
{"pretty-print", no_argument, NULL, 'p'},
{"recurse-limit", no_argument, NULL, 'R'},
{"recursion-limit", no_argument, NULL, 'R'},
{"no-recurse-limit", no_argument, NULL, 'r'},
{"no-recursion-limit", no_argument, NULL, 'r'},
{"section", required_argument, NULL, 'j'},
{"target", required_argument, NULL, 'b'},
{"help", no_argument, NULL, 'H'},
{"version", no_argument, NULL, 'V'},
{0, no_argument, 0, 0}
};
static void usage (FILE *, int);
static void slurp_symtab (bfd *);
static void find_address_in_section (bfd *, asection *, void *);
static void find_offset_in_section (bfd *, asection *);
static void translate_addresses (bfd *, asection *);
/* Print a usage message to STREAM and exit with STATUS. */
static void
usage (FILE *stream, int status)
{
fprintf (stream, _("Usage: %s [option(s)] [addr(s)]\n"), program_name);
fprintf (stream, _(" Convert addresses into line number/file name pairs.\n"));
fprintf (stream, _(" If no addresses are specified on the command line, they will be read from stdin\n"));
fprintf (stream, _(" The options are:\n\
@<file> Read options from <file>\n\
-a --addresses Show addresses\n\
-b --target=<bfdname> Set the binary file format\n\
-e --exe=<executable> Set the input file name (default is a.out)\n\
-i --inlines Unwind inlined functions\n\
-j --section=<name> Read section-relative offsets instead of addresses\n\
-p --pretty-print Make the output easier to read for humans\n\
-s --basenames Strip directory names\n\
-f --functions Show function names\n\
-C --demangle[=style] Demangle function names\n\
-R --recurse-limit Enable a limit on recursion whilst demangling. [Default]\n\
-r --no-recurse-limit Disable a limit on recursion whilst demangling\n\
-h --help Display this information\n\
-v --version Display the program's version\n\
\n"));
list_supported_targets (program_name, stream);
if (REPORT_BUGS_TO[0] && status == 0)
fprintf (stream, _("Report bugs to %s\n"), REPORT_BUGS_TO);
exit (status);
}
/* Read in the symbol table. */
static void
slurp_symtab (bfd *abfd)
{
long storage;
long symcount;
bfd_boolean dynamic = FALSE;
if ((bfd_get_file_flags (abfd) & HAS_SYMS) == 0)
return;
storage = bfd_get_symtab_upper_bound (abfd);
if (storage == 0)
{
storage = bfd_get_dynamic_symtab_upper_bound (abfd);
dynamic = TRUE;
}
if (storage < 0)
bfd_fatal (bfd_get_filename (abfd));
syms = (asymbol **) xmalloc (storage);
if (dynamic)
symcount = bfd_canonicalize_dynamic_symtab (abfd, syms);
else
symcount = bfd_canonicalize_symtab (abfd, syms);
if (symcount < 0)
bfd_fatal (bfd_get_filename (abfd));
/* If there are no symbols left after canonicalization and
we have not tried the dynamic symbols then give them a go. */
if (symcount == 0
&& ! dynamic
&& (storage = bfd_get_dynamic_symtab_upper_bound (abfd)) > 0)
{
free (syms);
syms = xmalloc (storage);
symcount = bfd_canonicalize_dynamic_symtab (abfd, syms);
}
/* PR 17512: file: 2a1d3b5b.
Do not pretend that we have some symbols when we don't. */
if (symcount <= 0)
{
free (syms);
syms = NULL;
}
}
/* These global variables are used to pass information between
translate_addresses and find_address_in_section. */
static bfd_vma pc;
static const char *filename;
static const char *functionname;
static unsigned int line;
static unsigned int discriminator;
static bfd_boolean found;
/* Look for an address in a section. This is called via
bfd_map_over_sections. */
static void
find_address_in_section (bfd *abfd, asection *section,
void *data ATTRIBUTE_UNUSED)
{
bfd_vma vma;
bfd_size_type size;
if (found)
return;
if ((bfd_section_flags (section) & SEC_ALLOC) == 0)
return;
vma = bfd_section_vma (section);
if (pc < vma)
return;
size = bfd_section_size (section);
if (pc >= vma + size)
return;
found = bfd_find_nearest_line_discriminator (abfd, section, syms, pc - vma,
&filename, &functionname,
&line, &discriminator);
}
/* Look for an offset in a section. This is directly called. */
static void
find_offset_in_section (bfd *abfd, asection *section)
{
bfd_size_type size;
if (found)
return;
if ((bfd_section_flags (section) & SEC_ALLOC) == 0)
return;
size = bfd_section_size (section);
if (pc >= size)
return;
found = bfd_find_nearest_line_discriminator (abfd, section, syms, pc,
&filename, &functionname,
&line, &discriminator);
}
/* Read hexadecimal addresses from stdin, translate into
file_name:line_number and optionally function name. */
static void
translate_addresses (bfd *abfd, asection *section)
{
int read_stdin = (naddr == 0);
for (;;)
{
if (read_stdin)
{
char addr_hex[100];
if (fgets (addr_hex, sizeof addr_hex, stdin) == NULL)
break;
pc = bfd_scan_vma (addr_hex, NULL, 16);
}
else
{
if (naddr <= 0)
break;
--naddr;
pc = bfd_scan_vma (*addr++, NULL, 16);
}
if (bfd_get_flavour (abfd) == bfd_target_elf_flavour)
{
const struct elf_backend_data *bed = get_elf_backend_data (abfd);
bfd_vma sign = (bfd_vma) 1 << (bed->s->arch_size - 1);
pc &= (sign << 1) - 1;
if (bed->sign_extend_vma)
pc = (pc ^ sign) - sign;
}
if (with_addresses)
{
printf ("0x");
bfd_printf_vma (abfd, pc);
if (pretty_print)
printf (": ");
else
printf ("\n");
}
found = FALSE;
if (section)
find_offset_in_section (abfd, section);
else
bfd_map_over_sections (abfd, find_address_in_section, NULL);
if (! found)
{
if (with_functions)
{
if (pretty_print)
printf ("?? ");
else
printf ("??\n");
}
printf ("??:0\n");
}
else
{
while (1)
{
if (with_functions)
{
const char *name;
char *alloc = NULL;
name = functionname;
if (name == NULL || *name == '\0')
name = "??";
else if (do_demangle)
{
alloc = bfd_demangle (abfd, name, demangle_flags);
if (alloc != NULL)
name = alloc;
}
printf ("%s", name);
if (pretty_print)
/* Note for translators: This printf is used to join the
function name just printed above to the line number/
file name pair that is about to be printed below. Eg:
foo at 123:bar.c */
printf (_(" at "));
else
printf ("\n");
free (alloc);
}
if (base_names && filename != NULL)
{
char *h;
h = strrchr (filename, '/');
if (h != NULL)
filename = h + 1;
}
printf ("%s:", filename ? filename : "??");
if (line != 0)
{
if (discriminator != 0)
printf ("%u (discriminator %u)\n", line, discriminator);
else
printf ("%u\n", line);
}
else
printf ("?\n");
if (!unwind_inlines)
found = FALSE;
else
found = bfd_find_inliner_info (abfd, &filename, &functionname,
&line);
if (! found)
break;
if (pretty_print)
/* Note for translators: This printf is used to join the
line number/file name pair that has just been printed with
the line number/file name pair that is going to be printed
by the next iteration of the while loop. Eg:
123:bar.c (inlined by) 456:main.c */
printf (_(" (inlined by) "));
}
}
/* fflush() is essential for using this command as a server
child process that reads addresses from a pipe and responds
with line number information, processing one address at a
time. */
fflush (stdout);
}
}
/* Process a file. Returns an exit value for main(). */
static int
process_file (const char *file_name, const char *section_name,
const char *target)
{
bfd *abfd;
asection *section;
char **matching;
if (get_file_size (file_name) < 1)
return 1;
abfd = bfd_openr (file_name, target);
if (abfd == NULL)
bfd_fatal (file_name);
/* Decompress sections. */
abfd->flags |= BFD_DECOMPRESS;
if (bfd_check_format (abfd, bfd_archive))
fatal (_("%s: cannot get addresses from archive"), file_name);
if (! bfd_check_format_matches (abfd, bfd_object, &matching))
{
bfd_nonfatal (bfd_get_filename (abfd));
if (bfd_get_error () == bfd_error_file_ambiguously_recognized)
{
list_matching_formats (matching);
free (matching);
}
xexit (1);
}
if (section_name != NULL)
{
section = bfd_get_section_by_name (abfd, section_name);
if (section == NULL)
fatal (_("%s: cannot find section %s"), file_name, section_name);
}
else
section = NULL;
slurp_symtab (abfd);
translate_addresses (abfd, section);
free (syms);
syms = NULL;
bfd_close (abfd);
return 0;
}
int
main (int argc, char **argv)
{
const char *file_name;
const char *section_name;
char *target;
int c;
#if defined (HAVE_SETLOCALE) && defined (HAVE_LC_MESSAGES)
setlocale (LC_MESSAGES, "");
#endif
#if defined (HAVE_SETLOCALE)
setlocale (LC_CTYPE, "");
#endif
bindtextdomain (PACKAGE, LOCALEDIR);
textdomain (PACKAGE);
program_name = *argv;
xmalloc_set_program_name (program_name);
bfd_set_error_program_name (program_name);
expandargv (&argc, &argv);
if (bfd_init () != BFD_INIT_MAGIC)
fatal (_("fatal error: libbfd ABI mismatch"));
set_default_bfd_target ();
file_name = NULL;
section_name = NULL;
target = NULL;
while ((c = getopt_long (argc, argv, "ab:Ce:rRsfHhij:pVv", long_options, (int *) 0))
!= EOF)
{
switch (c)
{
case 0:
break; /* We've been given a long option. */
case 'a':
with_addresses = TRUE;
break;
case 'b':
target = optarg;
break;
case 'C':
do_demangle = TRUE;
if (optarg != NULL)
{
enum demangling_styles style;
style = cplus_demangle_name_to_style (optarg);
if (style == unknown_demangling)
fatal (_("unknown demangling style `%s'"),
optarg);
cplus_demangle_set_style (style);
}
break;
case 'r':
demangle_flags |= DMGL_NO_RECURSE_LIMIT;
break;
case 'R':
demangle_flags &= ~ DMGL_NO_RECURSE_LIMIT;
break;
case 'e':
file_name = optarg;
break;
case 's':
base_names = TRUE;
break;
case 'f':
with_functions = TRUE;
break;
case 'p':
pretty_print = TRUE;
break;
case 'v':
case 'V':
print_version ("addr2line");
break;
case 'h':
case 'H':
usage (stdout, 0);
break;
case 'i':
unwind_inlines = TRUE;
break;
case 'j':
section_name = optarg;
break;
default:
usage (stderr, 1);
break;
}
}
if (file_name == NULL)
file_name = "a.out";
addr = argv + optind;
naddr = argc - optind;
return process_file (file_name, section_name, target);
}