/* Main program of GNU linker.
- Copyright (C) 1991, 92, 93, 94 Free Software Foundation, Inc.
+ Copyright (C) 1991, 92, 93, 94, 95, 96, 1997 Free Software Foundation, Inc.
Written by Steve Chamberlain steve@cygnus.com
This file is part of GLD, the Gnu Linker.
GNU General Public License for more details.
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, 675 Mass Ave, Cambridge, MA 02139, USA. */
-
+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. */
#include "bfd.h"
#include "sysdep.h"
#include <stdio.h>
+#include <ctype.h>
#include "libiberty.h"
#include "progress.h"
#include "bfdlink.h"
-#include "config.h"
#include "ld.h"
#include "ldmain.h"
#include "ldmisc.h"
#include <string.h>
-/* Use sbrk() except on specific OS types */
-#if !defined(__amigados__) && !defined(WINDOWS_NT)
-#define HAVE_SBRK
+#ifdef HAVE_SBRK
+#ifdef NEED_DECLARATION_SBRK
+extern PTR sbrk ();
+#endif
#endif
static char *get_emulation PARAMS ((int, char **));
const char *name,
bfd *, asection *, bfd_vma));
static boolean warning_callback PARAMS ((struct bfd_link_info *,
- const char *));
+ const char *, const char *, bfd *,
+ asection *, bfd_vma));
+static void warning_find_reloc PARAMS ((bfd *, asection *, PTR));
static boolean undefined_symbol PARAMS ((struct bfd_link_info *,
const char *, bfd *,
asection *, bfd_vma));
static boolean unattached_reloc PARAMS ((struct bfd_link_info *,
const char *, bfd *, asection *,
bfd_vma));
-static boolean notice_ysym PARAMS ((struct bfd_link_info *, const char *,
- bfd *, asection *, bfd_vma));
+static boolean notice PARAMS ((struct bfd_link_info *, const char *,
+ bfd *, asection *, bfd_vma));
static struct bfd_link_callbacks link_callbacks =
{
reloc_overflow,
reloc_dangerous,
unattached_reloc,
- notice_ysym
+ notice
};
struct bfd_link_info link_info;
bfd_init ();
+ bfd_set_error_program_name (program_name);
+
xatexit (remove_output);
+ /* Set the default BFD target based on the configured target. Doing
+ this permits the linker to be configured for a particular target,
+ and linked against a shared BFD library which was configured for
+ a different target. The macro TARGET is defined by Makefile. */
+ if (! bfd_set_default_target (TARGET))
+ {
+ einfo ("%X%P: can't set BFD default target to `%s': %E\n", TARGET);
+ xexit (1);
+ }
+
/* Initialize the data about options. */
trace_files = trace_file_tries = version_printed = false;
whole_archive = false;
- config.traditional_format = false;
config.build_constructors = true;
config.dynamic_link = false;
command_line.force_common_definition = false;
link_info.callbacks = &link_callbacks;
link_info.relocateable = false;
link_info.shared = false;
+ link_info.symbolic = false;
+ link_info.static_link = false;
+ link_info.traditional_format = false;
link_info.strip = strip_none;
link_info.discard = discard_none;
- link_info.lprefix_len = 1;
- link_info.lprefix = "L";
link_info.keep_memory = true;
link_info.input_bfds = NULL;
link_info.create_object_symbols_section = NULL;
link_info.hash = NULL;
link_info.keep_hash = NULL;
+ link_info.notice_all = false;
link_info.notice_hash = NULL;
- link_info.subsystem = console;
- link_info.stack_heap_parameters.stack_defined = false;
- link_info.stack_heap_parameters.heap_defined = false;
- link_info.stack_heap_parameters.stack_reserve = 0;
- link_info.stack_heap_parameters.stack_commit = 0;
- link_info.stack_heap_parameters.heap_reserve = 0;
- link_info.stack_heap_parameters.heap_commit = 0;
-
-
+ link_info.wrap_hash = NULL;
+
ldfile_add_arch ("");
config.make_executable = true;
lang_has_input_file = false;
parse_args (argc, argv);
+ ldemul_set_symbols ();
+
if (link_info.relocateable)
{
if (command_line.relax)
einfo ("%P%F: -relax and -r may not be used together\n");
- if (config.dynamic_link)
- einfo ("%P%F: -r and -call_shared may not be used together\n");
if (link_info.shared)
einfo ("%P%F: -r and -shared may not be used together\n");
}
info_msg (s);
info_msg ("\n==================================================\n");
}
+ lex_string = s;
lex_redirect (s);
}
parser_input = input_script;
yyparse ();
+ lex_string = NULL;
}
lang_final ();
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 ();
+
/* Even if we're producing relocateable output, some non-fatal errors should
be reported in the exit status. (What non-fatal errors, if any, do we
want to ignore for relocateable output?) */
output_filename);
}
- if (output_bfd->iostream)
- fclose ((FILE *) (output_bfd->iostream));
+ /* The file will be removed by remove_output. */
- unlink (output_filename);
xexit (1);
}
else
{
if (! bfd_close (output_bfd))
einfo ("%F%B: final close failed: %E\n", output_bfd);
+
+ /* If the --force-exe-suffix is enabled, and we're making an
+ executable file and it doesn't end in .exe, copy it to one which does. */
+
+ if (! link_info.relocateable && 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))
+ {
+ einfo ("%P: Error closing file `%s'\n", dst_name);
+ }
+ free (dst_name);
+ free (buf);
+ }
+ }
}
END_PROGRESS (program_name);
char *emulation;
int i;
- emulation = (char *) getenv (EMULATION_ENVIRON);
+ emulation = getenv (EMULATION_ENVIRON);
if (emulation == NULL)
emulation = DEFAULT_EMULATION;
}
else if (strcmp (argv[i], "-mips1") == 0
|| strcmp (argv[i], "-mips2") == 0
- || strcmp (argv[i], "-mips3") == 0)
+ || strcmp (argv[i], "-mips3") == 0
+ || strcmp (argv[i], "-mips4") == 0)
{
/* FIXME: The arguments -mips1, -mips2 and -mips3 are
passed to the linker by some MIPS compilers. They
/* Look for "ldscripts" in the dir where our binary is. */
end = strrchr (program_name, '/');
- if (end)
- {
- dirlen = end - program_name;
- /* Make a copy of program_name in dir.
- Leave room for later "/../lib". */
- dir = (char *) xmalloc (dirlen + 8);
- strncpy (dir, program_name, dirlen);
- dir[dirlen] = '\0';
- }
- else
+
+ if (end == NULL)
{
- dirlen = 1;
- dir = (char *) xmalloc (dirlen + 8);
- strcpy (dir, ".");
+ /* Don't look for ldscripts in the current directory. There is
+ too much potential for confusion. */
+ return;
}
+ dirlen = end - program_name;
+ /* Make a copy of program_name in dir.
+ Leave room for later "/../lib". */
+ dir = (char *) xmalloc (dirlen + 8);
+ strncpy (dir, program_name, dirlen);
+ dir[dirlen] = '\0';
+
if (check_for_scripts_dir (dir))
return; /* Don't free dir. */
einfo ("%P%F: bfd_hash_lookup failed: %E\n");
}
+/* Record a symbol to be wrapped, from the --wrap option. */
+
+void
+add_wrap (name)
+ const char *name;
+{
+ if (link_info.wrap_hash == NULL)
+ {
+ link_info.wrap_hash = ((struct bfd_hash_table *)
+ 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");
+}
+
/* Handle the -retain-symbols-file option. */
void
if (file == (FILE *) NULL)
{
bfd_set_error (bfd_error_system_call);
- einfo ("%X%P: %s: %E", filename);
+ einfo ("%X%P: %s: %E\n", filename);
return;
}
if (bfd_hash_lookup (link_info.keep_hash, buf, true, true)
== (struct bfd_hash_entry *) NULL)
- einfo ("%P%F: bfd_hash_lookup for insertion failed: %E");
+ einfo ("%P%F: bfd_hash_lookup for insertion failed: %E\n");
}
}
lang_input_statement_type *input;
input = ((lang_input_statement_type *)
- xmalloc ((bfd_size_type) sizeof (lang_input_statement_type)));
+ xmalloc (sizeof (lang_input_statement_type)));
input->filename = abfd->filename;
input->local_sym_name = abfd->filename;
input->the_bfd = abfd;
/* FIXME: The following fields are not set: header.next,
header.type, closed, passive_position, symbol_count,
- next_real_file, is_archive, target, real, common_section,
- common_output_section, complained. This bit of code is from the
- old decode_library_subfile function. I don't know whether any of
- those fields matters. */
+ next_real_file, is_archive, target, real. This bit of code is
+ from the old decode_library_subfile function. I don't know
+ whether any of those fields matters. */
ldlang_add_file (input);
if (config.map_file != (FILE *) NULL)
- minfo ("%s needed due to %T\n", abfd->filename, name);
+ {
+ static 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, "%-29s %s\n\n", "Archive member included",
+ "because of file (symbol)");
+ 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);
asection *nsec;
bfd_vma nval;
{
+ /* If either section has the output_section field set to
+ bfd_abs_section_ptr, it means that the section is being
+ discarded, and this is not really a multiple definition at all.
+ FIXME: It would be cleaner to somehow ignore symbols defined in
+ sections which are being discarded. */
+ 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 != (bfd *) NULL)
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, section, value);
+ ldctor_add_set_entry (h, reloc, (const char *) NULL, section, value);
if (h->type == bfd_link_hash_new)
{
asection *section;
bfd_vma value;
{
- char *set_name;
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;
/* Ensure that BFD_RELOC_CTOR exists now, so that we can give a
useful error message. */
- if (bfd_reloc_type_lookup (output_bfd, BFD_RELOC_CTOR) == NULL)
- einfo ("%P%F: BFD backend error: BFD_RELOC_CTOR unsupported");
+ if (bfd_reloc_type_lookup (output_bfd, BFD_RELOC_CTOR) == NULL
+ && (link_info.relocateable
+ || bfd_reloc_type_lookup (abfd, BFD_RELOC_CTOR) == NULL))
+ einfo ("%P%F: BFD backend error: BFD_RELOC_CTOR unsupported\n");
- set_name = (char *) alloca (1 + sizeof "__CTOR_LIST__");
s = set_name;
if (bfd_get_symbol_leading_char (abfd) != '\0')
*s++ = bfd_get_symbol_leading_char (abfd);
else
strcpy (s, "__DTOR_LIST__");
- if (config.map_file != (FILE *) NULL)
- fprintf (config.map_file,
- "Adding %s to constructor/destructor set %s\n", name, set_name);
-
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");
+ einfo ("%P%F: bfd_link_hash_lookup failed: %E\n");
if (h->type == bfd_link_hash_new)
{
h->type = bfd_link_hash_undefined;
ourselves. */
}
- ldctor_add_set_entry (h, BFD_RELOC_CTOR, section, value);
+ ldctor_add_set_entry (h, BFD_RELOC_CTOR, name, section, value);
return true;
}
+/* A structure used by warning_callback to pass information through
+ bfd_map_over_sections. */
+
+struct warning_callback_info
+{
+ boolean found;
+ const char *warning;
+ const char *symbol;
+ asymbol **asymbols;
+};
+
/* This is called when there is a reference to a warning symbol. */
/*ARGSUSED*/
static boolean
-warning_callback (info, warning)
+warning_callback (info, warning, symbol, abfd, section, address)
struct bfd_link_info *info;
const char *warning;
+ const char *symbol;
+ bfd *abfd;
+ asection *section;
+ bfd_vma address;
{
- einfo ("%P: %s\n", warning);
+ /* This is a hack to support warn_multiple_gp. FIXME: This should
+ have a cleaner interface, but what? */
+ if (! config.warn_multiple_gp
+ && strcmp (warning, "using multiple gp values") == 0)
+ return true;
+
+ if (section != NULL)
+ einfo ("%C: %s\n", abfd, section, address, warning);
+ else if (abfd == NULL)
+ einfo ("%P: %s\n", warning);
+ else if (symbol == NULL)
+ einfo ("%B: %s\n", abfd, warning);
+ else
+ {
+ lang_input_statement_type *entry;
+ asymbol **asymbols;
+ struct warning_callback_info info;
+
+ /* Look through the relocs to see if we can find a plausible
+ address. */
+
+ 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 = (asymbol **) 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, (PTR) &info);
+
+ if (! info.found)
+ einfo ("%B: %s\n", abfd, warning);
+
+ if (entry == NULL)
+ free (asymbols);
+ }
+
return true;
}
+/* This is called by warning_callback for each section. It checks the
+ relocs of the section to see if it can find a reference to the
+ symbol which triggered the warning. If it can, it uses the reloc
+ to give an error message with a file and line number. */
+
+static void
+warning_find_reloc (abfd, sec, iarg)
+ bfd *abfd;
+ asection *sec;
+ PTR iarg;
+{
+ struct warning_callback_info *info = (struct warning_callback_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 = (arelent **) 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)
+ {
+ /* We found a reloc for the symbol we are looking for. */
+ einfo ("%C: %s\n", abfd, sec, q->address, info->warning);
+ info->found = true;
+ break;
+ }
+ }
+
+ free (relpp);
+}
+
/* This is called when an undefined symbol is found. */
/*ARGSUSED*/
return true;
}
-/* This is called when a symbol in notice_hash is found. Symbols are
- put in notice_hash using the -y option. */
+/* This is called if link_info.notice_all is set, or when a symbol in
+ link_info.notice_hash is found. Symbols are put in notice_hash
+ using the -y option. */
-/*ARGSUSED*/
static boolean
-notice_ysym (info, name, abfd, section, value)
+notice (info, name, abfd, section, value)
struct bfd_link_info *info;
const char *name;
bfd *abfd;
asection *section;
bfd_vma value;
{
- einfo ("%B: %s %s\n", abfd,
- bfd_is_und_section (section) ? "reference to" : "definition of",
- name);
+ if (! info->notice_all
+ || (info->notice_hash != NULL
+ && bfd_hash_lookup (info->notice_hash, name, false, false) != NULL))
+ einfo ("%B: %s %s\n", abfd,
+ bfd_is_und_section (section) ? "reference to" : "definition of",
+ name);
+
+ if (command_line.cref || nocrossref_list != NULL)
+ add_cref (name, abfd, section, value);
+
return true;
}
projects / deliverable / binutils-gdb.git / blobdiff