binutils-gdb/ld/ldmisc.c

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/* ldmisc.c
Copyright 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
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2000, 2002, 2003
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Free Software Foundation, Inc.
Written by Steve Chamberlain of Cygnus Support.
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This file is part of GLD, the Gnu Linker.
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GLD 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 2, or (at your option)
any later version.
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GLD 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.
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You should have received a copy of the GNU General Public License
along with GLD; see the file COPYING. If not, write to the Free
Software Foundation, 59 Temple Place - Suite 330, Boston, MA
02111-1307, USA. */
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#include "bfd.h"
#include "bfdlink.h"
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#include "sysdep.h"
#include "libiberty.h"
#include "demangle.h"
#include <stdarg.h>
#include "ld.h"
#include "ldmisc.h"
#include "ldexp.h"
#include "ldlang.h"
#include <ldgram.h>
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#include "ldlex.h"
#include "ldmain.h"
#include "ldfile.h"
/*
%% literal %
%F error is fatal
%P print program name
%S print script file and linenumber
%E current bfd error or errno
%I filename from a lang_input_statement_type
%B filename from a bfd
%T symbol name
%X no object output, fail return
%V hex bfd_vma
%v hex bfd_vma, no leading zeros
%W hex bfd_vma with 0x with no leading zeros taking up 8 spaces
%C clever filename:linenumber with function
%D like %C, but no function name
%G like %D, but only function name
%R info about a relent
%s arbitrary string, like printf
%d integer, like printf
%u integer, like printf
*/
static void
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vfinfo (FILE *fp, const char *fmt, va_list arg)
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{
bfd_boolean fatal = FALSE;
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while (*fmt != '\0')
{
while (*fmt != '%' && *fmt != '\0')
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{
putc (*fmt, fp);
fmt++;
}
if (*fmt == '%')
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{
fmt++;
switch (*fmt++)
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{
default:
fprintf (fp, "%%%c", fmt[-1]);
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break;
case '%':
/* literal % */
putc ('%', fp);
break;
case 'X':
/* no object output, fail return */
config.make_executable = FALSE;
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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
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8 spaces. */
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{
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 *);
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if (name == NULL || *name == 0)
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fprintf (fp, _("no symbol"));
else if (! demangling)
fprintf (fp, "%s", name);
else
{
char *demangled;
demangled = demangle (name);
fprintf (fp, "%s", demangled);
free (demangled);
}
}
break;
case 'B':
/* filename from a bfd */
{
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bfd *abfd = va_arg (arg, bfd *);
if (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;
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break;
case 'P':
/* Print program name. */
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fprintf (fp, "%s", program_name);
break;
case 'E':
/* current bfd error or errno */
fprintf (fp, "%s", bfd_errmsg (bfd_get_error ()));
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break;
case 'I':
/* filename from a lang_input_statement_type */
{
lang_input_statement_type *i;
i = va_arg (arg, lang_input_statement_type *);
if (bfd_my_archive (i->the_bfd) != NULL)
fprintf (fp, "(%s)",
bfd_get_filename (bfd_my_archive (i->the_bfd)));
fprintf (fp, "%s", i->local_sym_name);
if (bfd_my_archive (i->the_bfd) == NULL
&& strcmp (i->local_sym_name, i->filename) != 0)
fprintf (fp, " (%s)", i->filename);
}
break;
case 'S':
/* Print script file and linenumber. */
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if (parsing_defsym)
fprintf (fp, "--defsym %s", lex_string);
else if (ldfile_input_filename != NULL)
fprintf (fp, "%s:%u", ldfile_input_filename, lineno);
else
fprintf (fp, _("built in linker script:%u"), lineno);
break;
case 'R':
/* Print all that's interesting about a relent. */
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{
arelent *relent = va_arg (arg, arelent *);
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lfinfo (fp, "%s+0x%v (type %s)",
(*(relent->sym_ptr_ptr))->name,
relent->addend,
relent->howto->name);
}
break;
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case 'C':
case 'D':
case 'G':
/* Clever filename:linenumber with function name if possible.
The arguments are a BFD, a section, and an offset. */
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{
static bfd *last_bfd;
static char *last_file = NULL;
static char *last_function = NULL;
bfd *abfd;
asection *section;
bfd_vma offset;
lang_input_statement_type *entry;
asymbol **asymbols;
const char *filename;
const char *functionname;
unsigned int linenumber;
bfd_boolean discard_last;
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abfd = va_arg (arg, bfd *);
section = va_arg (arg, asection *);
offset = va_arg (arg, bfd_vma);
entry = (lang_input_statement_type *) abfd->usrdata;
if (entry != (lang_input_statement_type *) NULL
&& entry->asymbols != (asymbol **) NULL)
asymbols = entry->asymbols;
else
{
long symsize;
long symbol_count;
symsize = bfd_get_symtab_upper_bound (abfd);
if (symsize < 0)
einfo (_("%B%F: could not read symbols\n"), abfd);
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asymbols = xmalloc (symsize);
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symbol_count = bfd_canonicalize_symtab (abfd, asymbols);
if (symbol_count < 0)
einfo (_("%B%F: could not read symbols\n"), abfd);
if (entry != (lang_input_statement_type *) NULL)
{
entry->asymbols = asymbols;
entry->symbol_count = symbol_count;
}
}
lfinfo (fp, "%B(%s+0x%v)", abfd, section->name, offset);
discard_last = TRUE;
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if (bfd_find_nearest_line (abfd, section, asymbols, offset,
&filename, &functionname,
&linenumber))
{
bfd_boolean need_colon = TRUE;
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if (functionname != NULL && fmt[-1] == 'C')
{
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if (last_bfd == NULL
|| last_file == NULL
|| last_function == NULL
|| last_bfd != abfd
|| (filename != NULL
&& strcmp (last_file, filename) != 0)
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|| strcmp (last_function, functionname) != 0)
{
lfinfo (fp, _(": In function `%T':\n"),
functionname);
need_colon = FALSE;
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last_bfd = abfd;
if (last_file != NULL)
free (last_file);
last_file = NULL;
if (filename)
last_file = xstrdup (filename);
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if (last_function != NULL)
free (last_function);
last_function = xstrdup (functionname);
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}
discard_last = FALSE;
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}
if (filename != NULL)
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{
if (need_colon)
putc (':', fp);
fputs (filename, fp);
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}
if (functionname != NULL && fmt[-1] == 'G')
lfinfo (fp, ":%T", functionname);
else if (filename != NULL && linenumber != 0)
fprintf (fp, ":%u", linenumber);
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}
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if (asymbols != NULL && entry == NULL)
free (asymbols);
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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;
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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;
}
}
}
if (config.fatal_warnings)
config.make_executable = FALSE;
if (fatal)
xexit (1);
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}
/* Wrapper around cplus_demangle. Strips leading underscores and
other such chars that would otherwise confuse the demangler. */
char *
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demangle (const char *name)
{
char *res;
const char *p;
if (output_bfd != NULL
&& bfd_get_symbol_leading_char (output_bfd) == name[0])
++name;
/* This is a hack for better error reporting on XCOFF, PowerPC64-ELF
or the MS PE format. These formats have a number of leading '.'s
on at least some symbols, so we remove all dots to avoid
confusing the demangler. */
p = name;
while (*p == '.')
++p;
res = cplus_demangle (p, DMGL_ANSI | DMGL_PARAMS);
if (res)
{
size_t dots = p - name;
/* Now put back any stripped dots. */
if (dots != 0)
{
size_t len = strlen (res) + 1;
char *add_dots = xmalloc (len + dots);
memcpy (add_dots, name, dots);
memcpy (add_dots + dots, res, len);
free (res);
res = add_dots;
}
return res;
}
return xstrdup (name);
}
/* Format info message and print on stdout. */
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/* (You would think this should be called just "info", but then you
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would be hosed by LynxOS, which defines that name in its libc.) */
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void
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info_msg (const char *fmt, ...)
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{
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va_list arg;
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va_start (arg, fmt);
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vfinfo (stdout, fmt, arg);
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va_end (arg);
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}
/* ('e' for error.) Format info message and print on stderr. */
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void
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einfo (const char *fmt, ...)
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{
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va_list arg;
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va_start (arg, fmt);
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vfinfo (stderr, fmt, arg);
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va_end (arg);
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}
void
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info_assert (const char *file, unsigned int line)
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{
einfo (_("%F%P: internal error %s %d\n"), file, line);
}
/* ('m' for map) Format info message and print on map. */
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void
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minfo (const char *fmt, ...)
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{
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va_list arg;
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va_start (arg, fmt);
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vfinfo (config.map_file, fmt, arg);
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va_end (arg);
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}
void
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lfinfo (FILE *file, const char *fmt, ...)
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{
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va_list arg;
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va_start (arg, fmt);
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vfinfo (file, fmt, arg);
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va_end (arg);
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}
/* Functions to print the link map. */
void
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print_space (void)
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{
fprintf (config.map_file, " ");
}
void
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print_nl (void)
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{
fprintf (config.map_file, "\n");
}
/* A more or less friendly abort message. In ld.h abort is defined to
call this function. */
void
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ld_abort (const char *file, int line, const char *fn)
{
if (fn != NULL)
einfo (_("%P: internal error: aborting at %s line %d in %s\n"),
file, line, fn);
else
einfo (_("%P: internal error: aborting at %s line %d\n"),
file, line);
einfo (_("%P%F: please report this bug\n"));
xexit (1);
}
bfd_boolean
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error_handler (int id, const char *fmt, ...)
{
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va_list arg;
va_start (arg, fmt);
switch (id)
{
default:
break;
/* We can be called with
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error_handler (-LD_DEFINITION_IN_DISCARDED_SECTION, "", 0);
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to make this error non-fatal and
error_handler (-LD_DEFINITION_IN_DISCARDED_SECTION, "", 1);
to make this error fatal. */
case -LD_DEFINITION_IN_DISCARDED_SECTION:
case LD_DEFINITION_IN_DISCARDED_SECTION:
{
static struct bfd_hash_table *hash;
static int fatal = 1;
const char *name;
if (id == -LD_DEFINITION_IN_DISCARDED_SECTION)
{
fatal = va_arg (arg, int);
goto out;
}
name = va_arg (arg, const char *);
/* Only warn once about a particular undefined symbol. */
if (hash == NULL)
{
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hash = xmalloc (sizeof (struct bfd_hash_table));
if (! bfd_hash_table_init (hash, bfd_hash_newfunc))
einfo (_("%F%P: bfd_hash_table_init failed: %E\n"));
}
if (bfd_hash_lookup (hash, name, FALSE, FALSE) != NULL)
goto out;
if (bfd_hash_lookup (hash, name, TRUE, TRUE) == NULL)
einfo (_("%F%P: bfd_hash_lookup failed: %E\n"));
if (fatal)
config.make_executable = FALSE;
}
break;
}
vfinfo (stderr, fmt, arg);
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out:
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va_end (arg);
return TRUE;
}