#include "bfd.h"
#include "sysdep.h"
#include <stdio.h>
#include "safe-ctype.h"
#include "libiberty.h"
#include "progress.h"
#include "bfdlink.h"
#include "filenames.h"
#include "ld.h"
#include "ldmain.h"
#include "ldmisc.h"
#include "ldwrite.h"
#include "ldexp.h"
#include "ldlang.h"
#include <ldgram.h>
#include "ldlex.h"
#include "ldfile.h"
#include "ldemul.h"
#include "ldctor.h"
#if !defined(S_ISDIR) && defined(S_IFDIR)
#define S_ISDIR(m) (((m) & S_IFMT) == S_IFDIR)
#endif
#include <string.h>
#ifdef HAVE_SBRK
#ifdef NEED_DECLARATION_SBRK
extern void *sbrk ();
#endif
#endif
#ifndef TARGET_SYSTEM_ROOT
#define TARGET_SYSTEM_ROOT ""
#endif
char *default_target;
const char *output_filename = "a.out";
char *program_name;
const char *ld_sysroot;
char * ld_canon_sysroot;
int ld_canon_sysroot_len;
bfd *output_bfd = 0;
int g_switch_value = 8;
bfd_boolean trace_files;
bfd_boolean trace_file_tries;
bfd_boolean version_printed;
bfd_boolean whole_archive;
bfd_boolean as_needed;
bfd_boolean add_needed = TRUE;
bfd_boolean demangling;
args_type command_line;
ld_config_type config;
sort_type sort_section;
static const char *get_sysroot
(int, char **);
static char *get_emulation
(int, char **);
static void set_scripts_dir
(void);
static bfd_boolean add_archive_element
(struct bfd_link_info *, bfd *, const char *);
static bfd_boolean multiple_definition
(struct bfd_link_info *, const char *, bfd *, asection *, bfd_vma,
bfd *, asection *, bfd_vma);
static bfd_boolean multiple_common
(struct bfd_link_info *, const char *, bfd *, enum bfd_link_hash_type,
bfd_vma, bfd *, enum bfd_link_hash_type, bfd_vma);
static bfd_boolean add_to_set
(struct bfd_link_info *, struct bfd_link_hash_entry *,
bfd_reloc_code_real_type, bfd *, asection *, bfd_vma);
static bfd_boolean constructor_callback
(struct bfd_link_info *, bfd_boolean, const char *, bfd *,
asection *, bfd_vma);
static bfd_boolean warning_callback
(struct bfd_link_info *, const char *, const char *, bfd *,
asection *, bfd_vma);
static void warning_find_reloc
(bfd *, asection *, void *);
static bfd_boolean undefined_symbol
(struct bfd_link_info *, const char *, bfd *, asection *, bfd_vma,
bfd_boolean);
static bfd_boolean reloc_overflow
(struct bfd_link_info *, struct bfd_link_hash_entry *, const char *,
const char *, bfd_vma, bfd *, asection *, bfd_vma);
static bfd_boolean reloc_dangerous
(struct bfd_link_info *, const char *, bfd *, asection *, bfd_vma);
static bfd_boolean unattached_reloc
(struct bfd_link_info *, const char *, bfd *, asection *, bfd_vma);
static bfd_boolean notice
(struct bfd_link_info *, const char *, bfd *, asection *, bfd_vma);
static struct bfd_link_callbacks link_callbacks =
{
add_archive_element,
multiple_definition,
multiple_common,
add_to_set,
constructor_callback,
warning_callback,
undefined_symbol,
reloc_overflow,
reloc_dangerous,
unattached_reloc,
notice
};
struct bfd_link_info link_info;
static void
remove_output (void)
{
if (output_filename)
{
if (output_bfd)
bfd_cache_close (output_bfd);
if (delete_output_file_on_failure)
unlink_if_ordinary (output_filename);
}
}
int
main (int argc, char **argv)
{
char *emulation;
long start_time = get_run_time ();
#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[0];
xmalloc_set_program_name (program_name);
START_PROGRESS (program_name, 0);
bfd_init ();
bfd_set_error_program_name (program_name);
xatexit (remove_output);
ld_sysroot = get_sysroot (argc, argv);
if (*ld_sysroot)
{
if (*TARGET_SYSTEM_ROOT == 0)
{
einfo ("%P%F: this linker was not configured to use sysroots");
ld_sysroot = "";
}
else
ld_canon_sysroot = lrealpath (ld_sysroot);
}
if (ld_canon_sysroot)
ld_canon_sysroot_len = strlen (ld_canon_sysroot);
else
ld_canon_sysroot_len = -1;
if (! bfd_set_default_target (TARGET))
{
einfo (_("%X%P: can't set BFD default target to `%s': %E\n"), TARGET);
xexit (1);
}
#if YYDEBUG
{
extern int yydebug;
yydebug = 1;
}
#endif
trace_files = trace_file_tries = version_printed = FALSE;
whole_archive = FALSE;
config.build_constructors = TRUE;
config.dynamic_link = FALSE;
config.has_shared = FALSE;
config.split_by_reloc = (unsigned) -1;
config.split_by_file = (bfd_size_type) -1;
config.hash_table_size = 0;
command_line.force_common_definition = FALSE;
command_line.inhibit_common_definition = FALSE;
command_line.interpreter = NULL;
command_line.rpath = NULL;
command_line.warn_mismatch = TRUE;
command_line.check_section_addresses = TRUE;
command_line.accept_unknown_input_arch = FALSE;
command_line.reduce_memory_overheads = FALSE;
sort_section = none;
demangling = getenv ("COLLECT_NO_DEMANGLE") == NULL;
link_info.relocatable = FALSE;
link_info.emitrelocations = FALSE;
link_info.task_link = FALSE;
link_info.shared = FALSE;
link_info.pie = FALSE;
link_info.executable = FALSE;
link_info.symbolic = FALSE;
link_info.export_dynamic = FALSE;
link_info.static_link = FALSE;
link_info.traditional_format = FALSE;
link_info.optimize = FALSE;
link_info.unresolved_syms_in_objects = RM_NOT_YET_SET;
link_info.unresolved_syms_in_shared_libs = RM_NOT_YET_SET;
link_info.allow_multiple_definition = FALSE;
link_info.allow_undefined_version = TRUE;
link_info.create_default_symver = FALSE;
link_info.default_imported_symver = FALSE;
link_info.keep_memory = TRUE;
link_info.notice_all = FALSE;
link_info.nocopyreloc = FALSE;
link_info.new_dtags = FALSE;
link_info.combreloc = TRUE;
link_info.eh_frame_hdr = FALSE;
link_info.relro = FALSE;
link_info.strip_discarded = TRUE;
link_info.strip = strip_none;
link_info.discard = discard_sec_merge;
link_info.common_skip_ar_aymbols = bfd_link_common_skip_none;
link_info.callbacks = &link_callbacks;
link_info.hash = NULL;
link_info.keep_hash = NULL;
link_info.notice_hash = NULL;
link_info.wrap_hash = NULL;
link_info.input_bfds = NULL;
link_info.create_object_symbols_section = NULL;
link_info.gc_sym_list = NULL;
link_info.base_file = NULL;
link_info.init_function = "_init";
link_info.fini_function = "_fini";
link_info.pei386_auto_import = -1;
link_info.pei386_runtime_pseudo_reloc = FALSE;
link_info.spare_dynamic_tags = 5;
link_info.flags = 0;
link_info.flags_1 = 0;
link_info.need_relax_finalize = FALSE;
link_info.warn_shared_textrel = FALSE;
ldfile_add_arch ("");
config.make_executable = TRUE;
force_make_executable = FALSE;
config.magic_demand_paged = TRUE;
config.text_read_only = TRUE;
emulation = get_emulation (argc, argv);
ldemul_choose_mode (emulation);
default_target = ldemul_choose_target (argc, argv);
lang_init ();
ldemul_before_parse ();
lang_has_input_file = FALSE;
parse_args (argc, argv);
if (config.hash_table_size != 0)
bfd_hash_set_default_size (config.hash_table_size);
ldemul_set_symbols ();
if (link_info.relocatable)
{
if (command_line.gc_sections)
einfo ("%P%F: --gc-sections and -r may not be used together\n");
else if (command_line.relax)
einfo (_("%P%F: --relax and -r may not be used together\n"));
if (link_info.shared)
einfo (_("%P%F: -r and -shared may not be used together\n"));
}
if (!config.dynamic_link && link_info.shared)
einfo (_("%P%F: -static and -shared may not be used together\n"));
if (! link_info.shared)
{
if (command_line.filter_shlib)
einfo (_("%P%F: -F may not be used without -shared\n"));
if (command_line.auxiliary_filters)
einfo (_("%P%F: -f may not be used without -shared\n"));
}
if (! link_info.shared || link_info.pie)
link_info.executable = TRUE;
if (link_info.relocatable && link_info.strip == strip_all)
{
link_info.strip = strip_debugger;
if (link_info.discard == discard_sec_merge)
link_info.discard = discard_all;
}
set_scripts_dir ();
if (saved_script_handle == NULL)
{
int isfile;
char *s = ldemul_get_script (&isfile);
if (isfile)
ldfile_open_command_file (s);
else
{
lex_string = s;
lex_redirect (s);
}
parser_input = input_script;
yyparse ();
lex_string = NULL;
}
if (trace_file_tries)
{
if (saved_script_handle)
info_msg (_("using external linker script:"));
else
info_msg (_("using internal linker script:"));
info_msg ("\n==================================================\n");
if (saved_script_handle)
{
static const int ld_bufsz = 8193;
size_t n;
char *buf = xmalloc (ld_bufsz);
rewind (saved_script_handle);
while ((n = fread (buf, 1, ld_bufsz - 1, saved_script_handle)) > 0)
{
buf[n] = 0;
info_msg (buf);
}
rewind (saved_script_handle);
free (buf);
}
else
{
int isfile;
info_msg (ldemul_get_script (&isfile));
}
info_msg ("\n==================================================\n");
}
lang_final ();
if (!lang_has_input_file)
{
if (version_printed)
xexit (0);
einfo (_("%P%F: no input files\n"));
}
if (trace_files)
info_msg (_("%P: mode %s\n"), emulation);
ldemul_after_parse ();
if (config.map_filename)
{
if (strcmp (config.map_filename, "-") == 0)
{
config.map_file = stdout;
}
else
{
config.map_file = fopen (config.map_filename, FOPEN_WT);
if (config.map_file == (FILE *) NULL)
{
bfd_set_error (bfd_error_system_call);
einfo (_("%P%F: cannot open map file %s: %E\n"),
config.map_filename);
}
}
}
lang_process ();
if (link_info.relocatable)
output_bfd->flags &= ~EXEC_P;
else
output_bfd->flags |= EXEC_P;
ldwrite ();
if (config.map_file != NULL)
lang_map ();
if (command_line.cref)
output_cref (config.map_file != NULL ? config.map_file : stdout);
if (nocrossref_list != NULL)
check_nocrossrefs ();
if (!config.make_executable && !force_make_executable)
{
if (trace_files)
einfo (_("%P: link errors found, deleting executable `%s'\n"),
output_filename);
xexit (1);
}
else
{
if (! bfd_close (output_bfd))
einfo (_("%F%B: final close failed: %E\n"), output_bfd);
if (! link_info.relocatable && command_line.force_exe_suffix)
{
int len = strlen (output_filename);
if (len < 4
|| (strcasecmp (output_filename + len - 4, ".exe") != 0
&& strcasecmp (output_filename + len - 4, ".dll") != 0))
{
FILE *src;
FILE *dst;
const int bsize = 4096;
char *buf = xmalloc (bsize);
int l;
char *dst_name = xmalloc (len + 5);
strcpy (dst_name, output_filename);
strcat (dst_name, ".exe");
src = fopen (output_filename, FOPEN_RB);
dst = fopen (dst_name, FOPEN_WB);
if (!src)
einfo (_("%X%P: unable to open for source of copy `%s'\n"),
output_filename);
if (!dst)
einfo (_("%X%P: unable to open for destination of copy `%s'\n"),
dst_name);
while ((l = fread (buf, 1, bsize, src)) > 0)
{
int done = fwrite (buf, 1, l, dst);
if (done != l)
einfo (_("%P: Error writing file `%s'\n"), dst_name);
}
fclose (src);
if (fclose (dst) == EOF)
einfo (_("%P: Error closing file `%s'\n"), dst_name);
free (dst_name);
free (buf);
}
}
}
END_PROGRESS (program_name);
if (config.stats)
{
#ifdef HAVE_SBRK
char *lim = sbrk (0);
#endif
long run_time = get_run_time () - start_time;
fprintf (stderr, _("%s: total time in link: %ld.%06ld\n"),
program_name, run_time / 1000000, run_time % 1000000);
#ifdef HAVE_SBRK
fprintf (stderr, _("%s: data size %ld\n"), program_name,
(long) (lim - (char *) &environ));
#endif
}
output_filename = NULL;
xexit (0);
return 0;
}
static char *
get_relative_sysroot (const char *from ATTRIBUTE_UNUSED)
{
#ifdef TARGET_SYSTEM_ROOT_RELOCATABLE
char *path;
struct stat s;
path = make_relative_prefix (program_name, from, TARGET_SYSTEM_ROOT);
if (path)
{
if (stat (path, &s) == 0 && S_ISDIR (s.st_mode))
return path;
free (path);
}
#endif
return 0;
}
static const char *
get_sysroot (int argc, char **argv)
{
int i;
const char *path;
for (i = 1; i < argc; i++)
if (strncmp (argv[i], "--sysroot=", strlen ("--sysroot=")) == 0)
return argv[i] + strlen ("--sysroot=");
path = get_relative_sysroot (BINDIR);
if (path)
return path;
path = get_relative_sysroot (TOOLBINDIR);
if (path)
return path;
return TARGET_SYSTEM_ROOT;
}
static char *
get_emulation (int argc, char **argv)
{
char *emulation;
int i;
emulation = getenv (EMULATION_ENVIRON);
if (emulation == NULL)
emulation = DEFAULT_EMULATION;
for (i = 1; i < argc; i++)
{
if (!strncmp (argv[i], "-m", 2))
{
if (argv[i][2] == '\0')
{
if (i < argc - 1)
{
emulation = argv[i + 1];
i++;
}
else
einfo (_("%P%F: missing argument to -m\n"));
}
else if (strcmp (argv[i], "-mips1") == 0
|| strcmp (argv[i], "-mips2") == 0
|| strcmp (argv[i], "-mips3") == 0
|| strcmp (argv[i], "-mips4") == 0
|| strcmp (argv[i], "-mips5") == 0
|| strcmp (argv[i], "-mips32") == 0
|| strcmp (argv[i], "-mips32r2") == 0
|| strcmp (argv[i], "-mips64") == 0
|| strcmp (argv[i], "-mips64r2") == 0)
{
}
else if (strcmp (argv[i], "-m486") == 0)
{
}
else
{
emulation = &argv[i][2];
}
}
}
return emulation;
}
static bfd_boolean
check_for_scripts_dir (char *dir)
{
size_t dirlen;
char *buf;
struct stat s;
bfd_boolean res;
dirlen = strlen (dir);
buf = xmalloc (dirlen + sizeof ("/ldscripts"));
sprintf (buf, "%s/ldscripts", dir);
res = stat (buf, &s) == 0 && S_ISDIR (s.st_mode);
free (buf);
if (res)
ldfile_add_library_path (dir, FALSE);
return res;
}
static void
set_scripts_dir (void)
{
char *end, *dir;
size_t dirlen;
bfd_boolean found;
dir = make_relative_prefix (program_name, BINDIR, SCRIPTDIR);
if (dir)
{
found = check_for_scripts_dir (dir);
free (dir);
if (found)
return;
}
dir = make_relative_prefix (program_name, TOOLBINDIR, SCRIPTDIR);
if (dir)
{
found = check_for_scripts_dir (dir);
free (dir);
if (found)
return;
}
if (check_for_scripts_dir (SCRIPTDIR))
return;
end = strrchr (program_name, '/');
#ifdef HAVE_DOS_BASED_FILE_SYSTEM
{
char *bslash = strrchr (program_name, '\\');
if (end == NULL || (bslash != NULL && bslash > end))
end = bslash;
}
#endif
if (end == NULL)
return;
dirlen = end - program_name;
dir = xmalloc (dirlen + 8);
strncpy (dir, program_name, dirlen);
dir[dirlen] = '\0';
if (check_for_scripts_dir (dir))
{
free (dir);
return;
}
strcpy (dir + dirlen, "/../lib");
check_for_scripts_dir (dir);
free (dir);
}
void
add_ysym (const char *name)
{
if (link_info.notice_hash == NULL)
{
link_info.notice_hash = xmalloc (sizeof (struct bfd_hash_table));
if (! bfd_hash_table_init_n (link_info.notice_hash,
bfd_hash_newfunc,
61))
einfo (_("%P%F: bfd_hash_table_init failed: %E\n"));
}
if (bfd_hash_lookup (link_info.notice_hash, name, TRUE, TRUE) == NULL)
einfo (_("%P%F: bfd_hash_lookup failed: %E\n"));
}
void
add_wrap (const char *name)
{
if (link_info.wrap_hash == NULL)
{
link_info.wrap_hash = xmalloc (sizeof (struct bfd_hash_table));
if (! bfd_hash_table_init_n (link_info.wrap_hash,
bfd_hash_newfunc,
61))
einfo (_("%P%F: bfd_hash_table_init failed: %E\n"));
}
if (bfd_hash_lookup (link_info.wrap_hash, name, TRUE, TRUE) == NULL)
einfo (_("%P%F: bfd_hash_lookup failed: %E\n"));
}
void
add_keepsyms_file (const char *filename)
{
FILE *file;
char *buf;
size_t bufsize;
int c;
if (link_info.strip == strip_some)
einfo (_("%X%P: error: duplicate retain-symbols-file\n"));
file = fopen (filename, "r");
if (file == NULL)
{
bfd_set_error (bfd_error_system_call);
einfo ("%X%P: %s: %E\n", filename);
return;
}
link_info.keep_hash = xmalloc (sizeof (struct bfd_hash_table));
if (! bfd_hash_table_init (link_info.keep_hash, bfd_hash_newfunc))
einfo (_("%P%F: bfd_hash_table_init failed: %E\n"));
bufsize = 100;
buf = xmalloc (bufsize);
c = getc (file);
while (c != EOF)
{
while (ISSPACE (c))
c = getc (file);
if (c != EOF)
{
size_t len = 0;
while (! ISSPACE (c) && c != EOF)
{
buf[len] = c;
++len;
if (len >= bufsize)
{
bufsize *= 2;
buf = xrealloc (buf, bufsize);
}
c = getc (file);
}
buf[len] = '\0';
if (bfd_hash_lookup (link_info.keep_hash, buf, TRUE, TRUE) == NULL)
einfo (_("%P%F: bfd_hash_lookup for insertion failed: %E\n"));
}
}
if (link_info.strip != strip_none)
einfo (_("%P: `-retain-symbols-file' overrides `-s' and `-S'\n"));
free (buf);
link_info.strip = strip_some;
}
static bfd_boolean
add_archive_element (struct bfd_link_info *info ATTRIBUTE_UNUSED,
bfd *abfd,
const char *name)
{
lang_input_statement_type *input;
input = xmalloc (sizeof (lang_input_statement_type));
input->filename = abfd->filename;
input->local_sym_name = abfd->filename;
input->the_bfd = abfd;
input->asymbols = NULL;
input->next = NULL;
input->just_syms_flag = FALSE;
input->loaded = FALSE;
input->search_dirs_flag = FALSE;
ldlang_add_file (input);
if (config.map_file != NULL)
{
static bfd_boolean header_printed;
struct bfd_link_hash_entry *h;
bfd *from;
int len;
h = bfd_link_hash_lookup (link_info.hash, name, FALSE, FALSE, TRUE);
if (h == NULL)
from = NULL;
else
{
switch (h->type)
{
default:
from = NULL;
break;
case bfd_link_hash_defined:
case bfd_link_hash_defweak:
from = h->u.def.section->owner;
break;
case bfd_link_hash_undefined:
case bfd_link_hash_undefweak:
from = h->u.undef.abfd;
break;
case bfd_link_hash_common:
from = h->u.c.p->section->owner;
break;
}
}
if (! header_printed)
{
char buf[100];
sprintf (buf, _("Archive member included because of file (symbol)\n\n"));
minfo ("%s", buf);
header_printed = TRUE;
}
if (bfd_my_archive (abfd) == NULL)
{
minfo ("%s", bfd_get_filename (abfd));
len = strlen (bfd_get_filename (abfd));
}
else
{
minfo ("%s(%s)", bfd_get_filename (bfd_my_archive (abfd)),
bfd_get_filename (abfd));
len = (strlen (bfd_get_filename (bfd_my_archive (abfd)))
+ strlen (bfd_get_filename (abfd))
+ 2);
}
if (len >= 29)
{
print_nl ();
len = 0;
}
while (len < 30)
{
print_space ();
++len;
}
if (from != NULL)
minfo ("%B ", from);
if (h != NULL)
minfo ("(%T)\n", h->root.string);
else
minfo ("(%s)\n", name);
}
if (trace_files || trace_file_tries)
info_msg ("%I\n", input);
return TRUE;
}
static bfd_boolean
multiple_definition (struct bfd_link_info *info ATTRIBUTE_UNUSED,
const char *name,
bfd *obfd,
asection *osec,
bfd_vma oval,
bfd *nbfd,
asection *nsec,
bfd_vma nval)
{
if ((osec->output_section != NULL
&& ! bfd_is_abs_section (osec)
&& bfd_is_abs_section (osec->output_section))
|| (nsec->output_section != NULL
&& ! bfd_is_abs_section (nsec)
&& bfd_is_abs_section (nsec->output_section)))
return TRUE;
einfo (_("%X%C: multiple definition of `%T'\n"),
nbfd, nsec, nval, name);
if (obfd != NULL)
einfo (_("%D: first defined here\n"), obfd, osec, oval);
if (command_line.relax)
{
einfo (_("%P: Disabling relaxation: it will not work with multiple definitions\n"));
command_line.relax = 0;
}
return TRUE;
}
static bfd_boolean
multiple_common (struct bfd_link_info *info ATTRIBUTE_UNUSED,
const char *name,
bfd *obfd,
enum bfd_link_hash_type otype,
bfd_vma osize,
bfd *nbfd,
enum bfd_link_hash_type ntype,
bfd_vma nsize)
{
if (! config.warn_common)
return TRUE;
if (ntype == bfd_link_hash_defined
|| ntype == bfd_link_hash_defweak
|| ntype == bfd_link_hash_indirect)
{
ASSERT (otype == bfd_link_hash_common);
einfo (_("%B: warning: definition of `%T' overriding common\n"),
nbfd, name);
if (obfd != NULL)
einfo (_("%B: warning: common is here\n"), obfd);
}
else if (otype == bfd_link_hash_defined
|| otype == bfd_link_hash_defweak
|| otype == bfd_link_hash_indirect)
{
ASSERT (ntype == bfd_link_hash_common);
einfo (_("%B: warning: common of `%T' overridden by definition\n"),
nbfd, name);
if (obfd != NULL)
einfo (_("%B: warning: defined here\n"), obfd);
}
else
{
ASSERT (otype == bfd_link_hash_common && ntype == bfd_link_hash_common);
if (osize > nsize)
{
einfo (_("%B: warning: common of `%T' overridden by larger common\n"),
nbfd, name);
if (obfd != NULL)
einfo (_("%B: warning: larger common is here\n"), obfd);
}
else if (nsize > osize)
{
einfo (_("%B: warning: common of `%T' overriding smaller common\n"),
nbfd, name);
if (obfd != NULL)
einfo (_("%B: warning: smaller common is here\n"), obfd);
}
else
{
einfo (_("%B: warning: multiple common of `%T'\n"), nbfd, name);
if (obfd != NULL)
einfo (_("%B: warning: previous common is here\n"), obfd);
}
}
return TRUE;
}
static bfd_boolean
add_to_set (struct bfd_link_info *info ATTRIBUTE_UNUSED,
struct bfd_link_hash_entry *h,
bfd_reloc_code_real_type reloc,
bfd *abfd,
asection *section,
bfd_vma value)
{
if (config.warn_constructors)
einfo (_("%P: warning: global constructor %s used\n"),
h->root.string);
if (! config.build_constructors)
return TRUE;
ldctor_add_set_entry (h, reloc, NULL, section, value);
if (h->type == bfd_link_hash_new)
{
h->type = bfd_link_hash_undefined;
h->u.undef.abfd = abfd;
}
return TRUE;
}
static bfd_boolean
constructor_callback (struct bfd_link_info *info,
bfd_boolean constructor,
const char *name,
bfd *abfd,
asection *section,
bfd_vma value)
{
char *s;
struct bfd_link_hash_entry *h;
char set_name[1 + sizeof "__CTOR_LIST__"];
if (config.warn_constructors)
einfo (_("%P: warning: global constructor %s used\n"), name);
if (! config.build_constructors)
return TRUE;
if (bfd_reloc_type_lookup (output_bfd, BFD_RELOC_CTOR) == NULL
&& (link_info.relocatable
|| bfd_reloc_type_lookup (abfd, BFD_RELOC_CTOR) == NULL))
einfo (_("%P%F: BFD backend error: BFD_RELOC_CTOR unsupported\n"));
s = set_name;
if (bfd_get_symbol_leading_char (abfd) != '\0')
*s++ = bfd_get_symbol_leading_char (abfd);
if (constructor)
strcpy (s, "__CTOR_LIST__");
else
strcpy (s, "__DTOR_LIST__");
h = bfd_link_hash_lookup (info->hash, set_name, TRUE, TRUE, TRUE);
if (h == (struct bfd_link_hash_entry *) NULL)
einfo (_("%P%F: bfd_link_hash_lookup failed: %E\n"));
if (h->type == bfd_link_hash_new)
{
h->type = bfd_link_hash_undefined;
h->u.undef.abfd = abfd;
}
ldctor_add_set_entry (h, BFD_RELOC_CTOR, name, section, value);
return TRUE;
}
struct warning_callback_info
{
bfd_boolean found;
const char *warning;
const char *symbol;
asymbol **asymbols;
};
static bfd_boolean
warning_callback (struct bfd_link_info *info ATTRIBUTE_UNUSED,
const char *warning,
const char *symbol,
bfd *abfd,
asection *section,
bfd_vma address)
{
if (! config.warn_multiple_gp
&& strcmp (warning, "using multiple gp values") == 0)
return TRUE;
if (section != NULL)
einfo ("%C: %s%s\n", abfd, section, address, _("warning: "), warning);
else if (abfd == NULL)
einfo ("%P: %s%s\n", _("warning: "), warning);
else if (symbol == NULL)
einfo ("%B: %s%s\n", abfd, _("warning: "), warning);
else
{
lang_input_statement_type *entry;
asymbol **asymbols;
struct warning_callback_info info;
entry = (lang_input_statement_type *) abfd->usrdata;
if (entry != NULL && entry->asymbols != 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: %E\n"), abfd);
asymbols = xmalloc (symsize);
symbol_count = bfd_canonicalize_symtab (abfd, asymbols);
if (symbol_count < 0)
einfo (_("%B%F: could not read symbols: %E\n"), abfd);
if (entry != NULL)
{
entry->asymbols = asymbols;
entry->symbol_count = symbol_count;
}
}
info.found = FALSE;
info.warning = warning;
info.symbol = symbol;
info.asymbols = asymbols;
bfd_map_over_sections (abfd, warning_find_reloc, &info);
if (! info.found)
einfo ("%B: %s%s\n", abfd, _("warning: "), warning);
if (entry == NULL)
free (asymbols);
}
return TRUE;
}
static void
warning_find_reloc (bfd *abfd, asection *sec, void *iarg)
{
struct warning_callback_info *info = iarg;
long relsize;
arelent **relpp;
long relcount;
arelent **p, **pend;
if (info->found)
return;
relsize = bfd_get_reloc_upper_bound (abfd, sec);
if (relsize < 0)
einfo (_("%B%F: could not read relocs: %E\n"), abfd);
if (relsize == 0)
return;
relpp = xmalloc (relsize);
relcount = bfd_canonicalize_reloc (abfd, sec, relpp, info->asymbols);
if (relcount < 0)
einfo (_("%B%F: could not read relocs: %E\n"), abfd);
p = relpp;
pend = p + relcount;
for (; p < pend && *p != NULL; p++)
{
arelent *q = *p;
if (q->sym_ptr_ptr != NULL
&& *q->sym_ptr_ptr != NULL
&& strcmp (bfd_asymbol_name (*q->sym_ptr_ptr), info->symbol) == 0)
{
einfo ("%C: %s%s\n", abfd, sec, q->address, _("warning: "),
info->warning);
info->found = TRUE;
break;
}
}
free (relpp);
}
static bfd_boolean
undefined_symbol (struct bfd_link_info *info ATTRIBUTE_UNUSED,
const char *name,
bfd *abfd,
asection *section,
bfd_vma address,
bfd_boolean error)
{
static char *error_name;
static unsigned int error_count;
#define MAX_ERRORS_IN_A_ROW 5
if (config.warn_once)
{
static struct bfd_hash_table *hash;
if (hash == NULL)
{
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)
return TRUE;
if (bfd_hash_lookup (hash, name, TRUE, TRUE) == NULL)
einfo (_("%F%P: bfd_hash_lookup failed: %E\n"));
}
if (error_name != NULL
&& strcmp (name, error_name) == 0)
++error_count;
else
{
error_count = 0;
if (error_name != NULL)
free (error_name);
error_name = xstrdup (name);
}
if (section != NULL)
{
if (error_count < MAX_ERRORS_IN_A_ROW)
{
if (error)
einfo (_("%X%C: undefined reference to `%T'\n"),
abfd, section, address, name);
else
einfo (_("%C: warning: undefined reference to `%T'\n"),
abfd, section, address, name);
}
else if (error_count == MAX_ERRORS_IN_A_ROW)
{
if (error)
einfo (_("%X%D: more undefined references to `%T' follow\n"),
abfd, section, address, name);
else
einfo (_("%D: warning: more undefined references to `%T' follow\n"),
abfd, section, address, name);
}
else if (error)
einfo ("%X");
}
else
{
if (error_count < MAX_ERRORS_IN_A_ROW)
{
if (error)
einfo (_("%X%B: undefined reference to `%T'\n"),
abfd, name);
else
einfo (_("%B: warning: undefined reference to `%T'\n"),
abfd, name);
}
else if (error_count == MAX_ERRORS_IN_A_ROW)
{
if (error)
einfo (_("%X%B: more undefined references to `%T' follow\n"),
abfd, name);
else
einfo (_("%B: warning: more undefined references to `%T' follow\n"),
abfd, name);
}
else if (error)
einfo ("%X");
}
return TRUE;
}
int overflow_cutoff_limit = 10;
static bfd_boolean
reloc_overflow (struct bfd_link_info *info ATTRIBUTE_UNUSED,
struct bfd_link_hash_entry *entry,
const char *name,
const char *reloc_name,
bfd_vma addend,
bfd *abfd,
asection *section,
bfd_vma address)
{
if (overflow_cutoff_limit == -1)
return TRUE;
if (abfd == NULL)
einfo (_("%P%X: generated"));
else
einfo ("%X%C:", abfd, section, address);
if (overflow_cutoff_limit >= 0
&& overflow_cutoff_limit-- == 0)
{
einfo (_(" additional relocation overflows omitted from the output\n"));
return TRUE;
}
if (entry)
{
while (entry->type == bfd_link_hash_indirect
|| entry->type == bfd_link_hash_warning)
entry = entry->u.i.link;
switch (entry->type)
{
case bfd_link_hash_undefined:
case bfd_link_hash_undefweak:
einfo (_(" relocation truncated to fit: %s against undefined symbol `%T'"),
reloc_name, entry->root.string);
break;
case bfd_link_hash_defined:
case bfd_link_hash_defweak:
einfo (_(" relocation truncated to fit: %s against symbol `%T' defined in %A section in %B"),
reloc_name, entry->root.string,
entry->u.def.section, entry->u.def.section->owner);
break;
default:
abort ();
break;
}
}
else
einfo (_(" relocation truncated to fit: %s against `%T'"),
reloc_name, name);
if (addend != 0)
einfo ("+%v", addend);
einfo ("\n");
return TRUE;
}
static bfd_boolean
reloc_dangerous (struct bfd_link_info *info ATTRIBUTE_UNUSED,
const char *message,
bfd *abfd,
asection *section,
bfd_vma address)
{
if (abfd == NULL)
einfo (_("%P%X: generated"));
else
einfo ("%X%C:", abfd, section, address);
einfo (_("dangerous relocation: %s\n"), message);
return TRUE;
}
static bfd_boolean
unattached_reloc (struct bfd_link_info *info ATTRIBUTE_UNUSED,
const char *name,
bfd *abfd,
asection *section,
bfd_vma address)
{
if (abfd == NULL)
einfo (_("%P%X: generated"));
else
einfo ("%X%C:", abfd, section, address);
einfo (_(" reloc refers to symbol `%T' which is not being output\n"), name);
return TRUE;
}
static bfd_boolean
notice (struct bfd_link_info *info,
const char *name,
bfd *abfd,
asection *section,
bfd_vma value)
{
if (! info->notice_all
|| (info->notice_hash != NULL
&& bfd_hash_lookup (info->notice_hash, name, FALSE, FALSE) != NULL))
{
if (bfd_is_und_section (section))
einfo ("%B: reference to %s\n", abfd, name);
else
einfo ("%B: definition of %s\n", abfd, name);
}
if (command_line.cref || nocrossref_list != NULL)
add_cref (name, abfd, section, value);
return TRUE;
}