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binutils-gdb/ld/lexsup.c
Ian Lance Taylor 2a9fa50cd8 Add support for ELF shared libraries. 
* ld.h (ld_config_type): Add field dynamic_link.
	* ldmain.c (main): Initialize config.dynamic_link to false.  Warn
	on attempts to use -r with -relax, -call_shared or -s.
	* lexsup.c (longopts): Separate OPTION_CALL_SHARED from
	OPTION_NON_SHARED.  Add OPTION_IGNORE.  Adjust macro values
	accordingly.  Add "dy" and "non_shared" options.  Change "Qy" to
	OPTION_IGNORE for now.  Handle OPTION_CALL_SHARED and
	OPTION_NON_SHARED by setting dynamic_link field accordingly.
	Handle OPTION_IGNORE by ignoring it.  Clear dynamic_link field for
	-r and -Ur.
	* ldfile.c (ldfile_open_file): If config.dynamic_link is true, try
	opening a file with a .so extension first.
	* emultempl/elf32.em: New file.
	* emulparams/elf32_sparc.sh (TEXT_START_ADDR): Change to 0x10000.
	(NONPAGED_TEXT_START_ADDR): Likewise.
	(TEMPLATE_NAME): Define as elf32.
	(DATA_PLT): Define.
	* emulparams/elf_i386.sh (TEMPLATE_NAME): Define as elf32.
	* scripttempl/elf.sc: Add placement for new dynamic sections.
	Don't use CREATE_OBJECT_SYMBOLS.  Define _etext, _edata and _end
	outside of any section.  Don't use ALIGN(8); just let one section
	VMA follow another.  Put .dynbss in .bss.  Don't mention debugging
	sections; they'll be handled correctly anyhow.
	* Makefile.in (eelf_i386.c): Depend upon elf32.em, not generic.em.
1994-05-19 18:25:10 +00:00

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/* Parse options for the GNU linker.
Copyright (C) 1991, 92, 93, 94 Free Software Foundation, Inc.
This file is part of GLD, the Gnu Linker.
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.
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.
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. */
#include "bfd.h"
#include "sysdep.h"
#include <stdio.h>
#include <string.h>
#include "getopt.h"
#include "bfdlink.h"
#include "config.h"
#include "ld.h"
#include "ldmain.h"
#include "ldmisc.h"
#include "ldexp.h"
#include "ldlang.h"
#include "ldgram.h"
#include "ldlex.h"
#include "ldfile.h"
#include "ldver.h"
/* Omit args to avoid the possibility of clashing with a system header
that might disagree about consts. */
unsigned long strtoul ();
static void set_default_dirlist PARAMS ((char *dirlist_ptr));
static void set_section_start PARAMS ((char *sect, char *valstr));
void
parse_args (argc, argv)
int argc;
char **argv;
{
/* Starting the short option string with '-' is for programs that
expect options and other ARGV-elements in any order and that care about
the ordering of the two. We describe each non-option ARGV-element
as if it were the argument of an option with character code 1. */
const char *shortopts = "-A:B::b:cde:F::G:giL:l:Mm:NnO:o:R:rSsT:tu:VvXxY:y:";
/* 150 isn't special; it's just an arbitrary non-ASCII char value. */
static struct option longopts[] = {
#define OPTION_CALL_SHARED 150
#define OPTION_NON_SHARED 151
{"call_shared", no_argument, NULL, OPTION_CALL_SHARED},
{"dc", no_argument, NULL, 'd'},
#define OPTION_DEFSYM 152
{"defsym", required_argument, NULL, OPTION_DEFSYM},
{"dn", no_argument, NULL, OPTION_NON_SHARED},
{"dp", no_argument, NULL, 'd'},
{"dy", no_argument, NULL, OPTION_CALL_SHARED},
#define OPTION_EB 153
{"EB", no_argument, NULL, OPTION_EB},
#define OPTION_EL 154
{"EL", no_argument, NULL, OPTION_EL},
{"format", required_argument, NULL, 'b'},
#define OPTION_HELP 155
{"help", no_argument, NULL, OPTION_HELP},
#define OPTION_MAP 156
{"Map", required_argument, NULL, OPTION_MAP},
#define OPTION_NO_KEEP_MEMORY 157
{"no-keep-memory", no_argument, NULL, OPTION_NO_KEEP_MEMORY},
#define OPTION_NOINHIBIT_EXEC 158
{"noinhibit-exec", no_argument, NULL, OPTION_NOINHIBIT_EXEC},
{"noinhibit_exec", no_argument, NULL, OPTION_NOINHIBIT_EXEC},
{"non_shared", no_argument, NULL, OPTION_NON_SHARED},
#define OPTION_OFORMAT 159
{"oformat", required_argument, NULL, OPTION_OFORMAT},
#define OPTION_IGNORE 160
{"Qy", no_argument, NULL, OPTION_IGNORE},
#define OPTION_RELAX 161
{"relax", no_argument, NULL, OPTION_RELAX},
#define OPTION_RETAIN_SYMBOLS_FILE 162
{"retain-symbols-file", no_argument, NULL, OPTION_RETAIN_SYMBOLS_FILE},
#define OPTION_SORT_COMMON 163
{"sort-common", no_argument, NULL, OPTION_SORT_COMMON},
{"sort_common", no_argument, NULL, OPTION_SORT_COMMON},
#define OPTION_STATS 164
{"stats", no_argument, NULL, OPTION_STATS},
#define OPTION_TBSS 165
{"Tbss", required_argument, NULL, OPTION_TBSS},
#define OPTION_TDATA 166
{"Tdata", required_argument, NULL, OPTION_TDATA},
#define OPTION_TTEXT 167
{"Ttext", required_argument, NULL, OPTION_TTEXT},
#define OPTION_UR 168
{"Ur", no_argument, NULL, OPTION_UR},
#define OPTION_VERSION 169
{"version", no_argument, NULL, OPTION_VERSION},
#define OPTION_WARN_COMMON 170
{"warn-common", no_argument, NULL, OPTION_WARN_COMMON},
{NULL, no_argument, NULL, 0}
};
while (1)
{
/* getopt_long_only is like getopt_long, but '-' as well as '--' can
indicate a long option. */
int longind;
int optc = getopt_long_only (argc, argv, shortopts, longopts, &longind);
if (optc == -1)
break;
switch (optc)
{
default:
xexit (1);
case 1: /* File name. */
lang_add_input_file (optarg, lang_input_file_is_file_enum,
(char *) NULL);
break;
case OPTION_IGNORE:
break;
case 'A':
ldfile_add_arch (optarg);
break;
case 'B':
/* Ignore. */
break;
case 'b':
lang_add_target (optarg);
break;
case 'c':
ldfile_open_command_file (optarg);
parser_input = input_mri_script;
yyparse ();
break;
case OPTION_CALL_SHARED:
config.dynamic_link = true;
break;
case OPTION_NON_SHARED:
config.dynamic_link = false;
break;
case 'd':
command_line.force_common_definition = true;
break;
case OPTION_DEFSYM:
lex_redirect (optarg);
parser_input = input_defsym;
yyparse ();
break;
case OPTION_EB:
/* FIXME: This is currently ignored. It means
``produce a big-endian object file''. It could
be used to select an output format. */
break;
case OPTION_EL:
/* FIXME: This is currently ignored. It means
``produce a little-endian object file''. It could
be used to select an output format. */
break;
case 'e':
lang_add_entry (optarg);
break;
case 'F':
/* Ignore. */
break;
case 'G':
{
char *end;
g_switch_value = strtoul (optarg, &end, 0);
if (*end)
einfo ("%P%F: invalid number `%s'\n", optarg);
}
break;
case 'g':
/* Ignore. */
break;
case OPTION_HELP:
help ();
xexit (0);
break;
case 'L':
ldfile_add_library_path (optarg);
break;
case 'l':
lang_add_input_file (optarg, lang_input_file_is_l_enum,
(char *) NULL);
break;
case 'M':
config.map_filename = "-";
break;
case 'm':
/* Ignore. Was handled in a pre-parse. */
break;
case OPTION_MAP:
config.map_filename = optarg;
break;
case 'N':
config.text_read_only = false;
config.magic_demand_paged = false;
break;
case 'n':
config.magic_demand_paged = false;
break;
case OPTION_NO_KEEP_MEMORY:
link_info.keep_memory = false;
break;
case OPTION_NOINHIBIT_EXEC:
force_make_executable = true;
break;
case 'O':
/* FIXME "-O<non-digits> <value>" used to set the address of
section <non-digits>. Was this for compatibility with
something, or can we create a new option to do that
(with a syntax similar to -defsym)?
getopt can't handle two args to an option without kludges. */
set_default_dirlist (optarg);
break;
case 'o':
lang_add_output (optarg, 0);
break;
case OPTION_OFORMAT:
lang_add_output_format (optarg, 0);
break;
case 'r':
link_info.relocateable = true;
config.build_constructors = false;
config.magic_demand_paged = false;
config.text_read_only = false;
config.dynamic_link = false;
break;
case 'R':
lang_add_input_file (optarg,
lang_input_file_is_symbols_only_enum,
(char *) NULL);
break;
case OPTION_RELAX:
command_line.relax = true;
break;
case OPTION_RETAIN_SYMBOLS_FILE:
add_keepsyms_file (optarg);
break;
case 'S':
link_info.strip = strip_debugger;
break;
case 's':
link_info.strip = strip_all;
break;
case OPTION_SORT_COMMON:
config.sort_common = true;
break;
case OPTION_STATS:
config.stats = true;
break;
case 't':
trace_files = true;
break;
case 'T':
ldfile_open_command_file (optarg);
parser_input = input_script;
yyparse ();
break;
case OPTION_TBSS:
set_section_start (".bss", optarg);
break;
case OPTION_TDATA:
set_section_start (".data", optarg);
break;
case OPTION_TTEXT:
set_section_start (".text", optarg);
break;
case OPTION_UR:
link_info.relocateable = true;
config.build_constructors = true;
config.magic_demand_paged = false;
config.text_read_only = false;
config.dynamic_link = false;
break;
case 'u':
ldlang_add_undef (optarg);
break;
case 'V':
ldversion (1);
version_printed = true;
trace_file_tries = true;
break;
case 'v':
ldversion (0);
version_printed = true;
break;
case OPTION_VERSION:
ldversion (0);
version_printed = true;
break;
case OPTION_WARN_COMMON:
config.warn_common = true;
break;
case 'X':
link_info.discard = discard_l;
break;
case 'x':
link_info.discard = discard_all;
break;
case 'Y':
set_default_dirlist (optarg);
break;
case 'y':
add_ysym (optarg);
break;
}
}
}
/* Add the (colon-separated) elements of DIRLIST_PTR to the
library search path. */
static void
set_default_dirlist (dirlist_ptr)
char *dirlist_ptr;
{
char *p;
while (1)
{
p = strchr (dirlist_ptr, ':');
if (p != NULL)
*p = 0;
if (*dirlist_ptr)
ldfile_add_library_path (dirlist_ptr);
if (p == NULL)
break;
*p = ':';
dirlist_ptr = p + 1;
}
}
static void
set_section_start (sect, valstr)
char *sect, *valstr;
{
char *end;
unsigned long val = strtoul (valstr, &end, 16);
if (*end)
einfo ("%P%F: invalid hex number `%s'\n", valstr);
lang_section_start (sect, exp_intop (val));
}
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