binutils-gdb/ld/ldmisc.c

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/* ldmisc.c
Copyright (C) 1991-2017 Free Software Foundation, Inc.
Written by Steve Chamberlain of Cygnus Support.
This file is part of the 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 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, write to the Free Software
Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
MA 02110-1301, USA. */
#include "sysdep.h"
#include "bfd.h"
#include "bfdlink.h"
#include "libiberty.h"
#include "filenames.h"
#include "demangle.h"
#include <stdarg.h>
#include "ld.h"
#include "ldmisc.h"
#include "ldexp.h"
#include "ldlang.h"
#include <ldgram.h>
#include "ldlex.h"
#include "ldmain.h"
#include "ldfile.h"
#include "elf-bfd.h"
#include "coff-bfd.h"
/*
%% literal %
%A section name from a section
%B filename from a bfd
%C clever filename:linenumber with function
%D like %C, but no function name
%E current bfd error or errno
%F error is fatal
%G like %D, but only function name
%H like %C but in addition emit section+offset
%I filename from a lang_input_statement_type
%P print program name
%R info about a relent
%S print script file and linenumber from etree_type.
%T symbol name
%V hex bfd_vma
%W hex bfd_vma with 0x with no leading zeros taking up 8 spaces
%X no object output, fail return
%d integer, like printf
%ld long, like printf
%lu unsigned long, like printf
%p native (host) void* pointer, like printf
%s arbitrary string, like printf
%u integer, like printf
%v hex bfd_vma, no leading zeros
*/
void
vfinfo (FILE *fp, const char *fmt, va_list arg, bfd_boolean is_warning)
{
bfd_boolean fatal = FALSE;
while (*fmt != '\0')
{
const char *str = fmt;
while (*fmt != '%' && *fmt != '\0')
fmt++;
if (fmt != str)
if (fwrite (str, 1, fmt - str, fp))
{
/* Ignore. */
}
if (*fmt == '%')
{
fmt++;
switch (*fmt++)
{
case '%':
/* literal % */
putc ('%', fp);
break;
case 'X':
/* no object output, fail return */
config.make_executable = FALSE;
break;
case 'V':
/* hex bfd_vma */
{
bfd_vma value = va_arg (arg, bfd_vma);
fprintf_vma (fp, value);
}
break;
case 'v':
/* hex bfd_vma, no leading zeros */
{
char buf[100];
char *p = buf;
bfd_vma value = va_arg (arg, bfd_vma);
sprintf_vma (p, value);
while (*p == '0')
p++;
if (!*p)
p--;
fputs (p, fp);
}
break;
case 'W':
/* hex bfd_vma with 0x with no leading zeroes taking up
8 spaces. */
{
char buf[100];
bfd_vma value;
char *p;
int len;
value = va_arg (arg, bfd_vma);
sprintf_vma (buf, value);
for (p = buf; *p == '0'; ++p)
;
if (*p == '\0')
--p;
len = strlen (p);
while (len < 8)
{
putc (' ', fp);
++len;
}
fprintf (fp, "0x%s", p);
}
break;
case 'T':
/* Symbol name. */
{
const char *name = va_arg (arg, const char *);
if (name == NULL || *name == 0)
{
fprintf (fp, _("no symbol"));
break;
}
else if (demangling)
{
char *demangled;
demangled = bfd_demangle (link_info.output_bfd, name,
DMGL_ANSI | DMGL_PARAMS);
if (demangled != NULL)
{
fprintf (fp, "%s", demangled);
free (demangled);
break;
}
}
fprintf (fp, "%s", name);
}
break;
case 'A':
/* section name from a section */
{
asection *sec = va_arg (arg, asection *);
bfd *abfd = sec->owner;
const char *group = NULL;
struct coff_comdat_info *ci;
fprintf (fp, "%s", sec->name);
if (abfd != NULL
&& bfd_get_flavour (abfd) == bfd_target_elf_flavour
&& elf_next_in_group (sec) != NULL
&& (sec->flags & SEC_GROUP) == 0)
group = elf_group_name (sec);
else if (abfd != NULL
&& bfd_get_flavour (abfd) == bfd_target_coff_flavour
&& (ci = bfd_coff_get_comdat_section (sec->owner,
sec)) != NULL)
group = ci->name;
if (group != NULL)
fprintf (fp, "[%s]", group);
}
break;
case 'B':
/* filename from a bfd */
{
bfd *abfd = va_arg (arg, bfd *);
if (abfd == NULL)
fprintf (fp, "%s generated", program_name);
else if (abfd->my_archive != NULL
&& !bfd_is_thin_archive (abfd->my_archive))
fprintf (fp, "%s(%s)", abfd->my_archive->filename,
abfd->filename);
else
fprintf (fp, "%s", abfd->filename);
}
break;
case 'F':
/* Error is fatal. */
fatal = TRUE;
break;
case 'P':
/* Print program name. */
fprintf (fp, "%s", program_name);
break;
case 'E':
/* current bfd error or errno */
fprintf (fp, "%s", bfd_errmsg (bfd_get_error ()));
break;
case 'I':
/* filename from a lang_input_statement_type */
{
lang_input_statement_type *i;
i = va_arg (arg, lang_input_statement_type *);
if (i->the_bfd->my_archive != NULL
&& !bfd_is_thin_archive (i->the_bfd->my_archive))
fprintf (fp, "(%s)",
bfd_get_filename (i->the_bfd->my_archive));
fprintf (fp, "%s", i->local_sym_name);
if ((i->the_bfd->my_archive == NULL
|| bfd_is_thin_archive (i->the_bfd->my_archive))
&& filename_cmp (i->local_sym_name, i->filename) != 0)
fprintf (fp, " (%s)", i->filename);
}
break;
case 'S':
/* Print script file and linenumber. */
{
etree_type node;
etree_type *tp = va_arg (arg, etree_type *);
if (tp == NULL)
{
tp = &node;
tp->type.filename = ldlex_filename ();
tp->type.lineno = lineno;
}
if (tp->type.filename != NULL)
fprintf (fp, "%s:%u", tp->type.filename, tp->type.lineno);
}
break;
case 'R':
/* Print all that's interesting about a relent. */
{
arelent *relent = va_arg (arg, arelent *);
lfinfo (fp, "%s+0x%v (type %s)",
(*(relent->sym_ptr_ptr))->name,
relent->addend,
relent->howto->name);
}
break;
case 'C':
case 'D':
case 'G':
case 'H':
/* Clever filename:linenumber with function name if possible.
The arguments are a BFD, a section, and an offset. */
{
static bfd *last_bfd;
static char *last_file;
static char *last_function;
bfd *abfd;
asection *section;
bfd_vma offset;
asymbol **asymbols = NULL;
const char *filename;
const char *functionname;
unsigned int linenumber;
bfd_boolean discard_last;
bfd_boolean done;
abfd = va_arg (arg, bfd *);
section = va_arg (arg, asection *);
offset = va_arg (arg, bfd_vma);
if (abfd != NULL)
{
if (!bfd_generic_link_read_symbols (abfd))
einfo (_("%B%F: could not read symbols: %E\n"), abfd);
asymbols = bfd_get_outsymbols (abfd);
}
/* The GNU Coding Standard requires that error messages
be of the form:
source-file-name:lineno: message
We do not always have a line number available so if
we cannot find them we print out the section name and
offset instead. */
discard_last = TRUE;
if (abfd != NULL
&& bfd_find_nearest_line (abfd, section, asymbols, offset,
&filename, &functionname,
&linenumber))
{
if (functionname != NULL
&& (fmt[-1] == 'C' || fmt[-1] == 'H'))
{
/* Detect the case where we are printing out a
message for the same function as the last
call to vinfo ("%C"). In this situation do
not print out the ABFD filename or the
function name again. Note - we do still
print out the source filename, as this will
allow programs that parse the linker's output
(eg emacs) to correctly locate multiple
errors in the same source file. */
if (last_bfd == NULL
|| last_function == NULL
|| last_bfd != abfd
|| (last_file == NULL) != (filename == NULL)
|| (filename != NULL
&& filename_cmp (last_file, filename) != 0)
|| strcmp (last_function, functionname) != 0)
{
lfinfo (fp, _("%B: In function `%T':\n"),
abfd, functionname);
last_bfd = abfd;
if (last_file != NULL)
free (last_file);
last_file = NULL;
if (filename)
last_file = xstrdup (filename);
if (last_function != NULL)
free (last_function);
last_function = xstrdup (functionname);
}
discard_last = FALSE;
}
else
lfinfo (fp, "%B:", abfd);
if (filename != NULL)
fprintf (fp, "%s:", filename);
done = fmt[-1] != 'H';
if (functionname != NULL && fmt[-1] == 'G')
lfinfo (fp, "%T", functionname);
else if (filename != NULL && linenumber != 0)
fprintf (fp, "%u%s", linenumber, done ? "" : ":");
else
done = FALSE;
}
else
{
lfinfo (fp, "%B:", abfd);
done = FALSE;
}
if (!done)
lfinfo (fp, "(%A+0x%v)", section, offset);
if (discard_last)
{
last_bfd = NULL;
if (last_file != NULL)
{
free (last_file);
last_file = NULL;
}
if (last_function != NULL)
{
free (last_function);
last_function = NULL;
}
}
}
break;
case 'p':
/* native (host) void* pointer, like printf */
fprintf (fp, "%p", va_arg (arg, void *));
break;
case 's':
/* arbitrary string, like printf */
fprintf (fp, "%s", va_arg (arg, char *));
break;
case 'd':
/* integer, like printf */
fprintf (fp, "%d", va_arg (arg, int));
break;
case 'u':
/* unsigned integer, like printf */
fprintf (fp, "%u", va_arg (arg, unsigned int));
break;
case 'l':
if (*fmt == 'd')
{
fprintf (fp, "%ld", va_arg (arg, long));
++fmt;
break;
}
else if (*fmt == 'u')
{
fprintf (fp, "%lu", va_arg (arg, unsigned long));
++fmt;
break;
}
/* Fallthru */
default:
fprintf (fp, "%%%c", fmt[-1]);
break;
}
}
}
if (is_warning && config.fatal_warnings)
config.make_executable = FALSE;
if (fatal)
xexit (1);
}
/* Format info message and print on stdout. */
/* (You would think this should be called just "info", but then you
would be hosed by LynxOS, which defines that name in its libc.) */
void
info_msg (const char *fmt, ...)
{
va_list arg;
va_start (arg, fmt);
vfinfo (stdout, fmt, arg, FALSE);
va_end (arg);
}
/* ('e' for error.) Format info message and print on stderr. */
void
einfo (const char *fmt, ...)
{
va_list arg;
fflush (stdout);
va_start (arg, fmt);
vfinfo (stderr, fmt, arg, TRUE);
va_end (arg);
fflush (stderr);
}
void
info_assert (const char *file, unsigned int line)
{
einfo (_("%F%P: internal error %s %d\n"), file, line);
}
/* ('m' for map) Format info message and print on map. */
void
minfo (const char *fmt, ...)
{
if (config.map_file != NULL)
{
va_list arg;
va_start (arg, fmt);
if (fmt[0] == '%' && fmt[1] == '!' && fmt[2] == 0)
{
/* Stash info about --as-needed shared libraries. Print
later so they don't appear intermingled with archive
library info. */
struct asneeded_minfo *m = xmalloc (sizeof *m);
m->next = NULL;
m->soname = va_arg (arg, const char *);
m->ref = va_arg (arg, bfd *);
m->name = va_arg (arg, const char *);
*asneeded_list_tail = m;
asneeded_list_tail = &m->next;
}
else
vfinfo (config.map_file, fmt, arg, FALSE);
va_end (arg);
}
}
void
lfinfo (FILE *file, const char *fmt, ...)
{
va_list arg;
va_start (arg, fmt);
vfinfo (file, fmt, arg, FALSE);
va_end (arg);
}
/* Functions to print the link map. */
void
print_space (void)
{
fprintf (config.map_file, " ");
}
void
print_nl (void)
{
fprintf (config.map_file, "\n");
}
/* A more or less friendly abort message. In ld.h abort is defined to
call this function. */
void
ld_abort (const char *file, int line, const char *fn)
{
if (fn != NULL)
einfo (_("%P: internal error: aborting at %s:%d in %s\n"),
file, line, fn);
else
einfo (_("%P: internal error: aborting at %s:%d\n"),
file, line);
einfo (_("%P%F: please report this bug\n"));
xexit (1);
}