| 1 | # This shell script emits a C file. -*- C -*-
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| 2 | # It does some substitutions.
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| 3 | cat >e${EMULATION_NAME}.c <<EOF
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| 4 | /* This file is is generated by a shell script. DO NOT EDIT! */
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| 5 |
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| 6 | /* emulate the original gld for the given ${EMULATION_NAME}
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| 7 | Copyright 1991, 1993, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003
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| 8 | Free Software Foundation, Inc.
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| 9 | Written by Steve Chamberlain steve@cygnus.com
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| 10 |
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| 11 | This file is part of GLD, the Gnu Linker.
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| 12 |
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| 13 | This program is free software; you can redistribute it and/or modify
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| 14 | it under the terms of the GNU General Public License as published by
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| 15 | the Free Software Foundation; either version 2 of the License, or
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| 16 | (at your option) any later version.
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| 17 |
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| 18 | This program is distributed in the hope that it will be useful,
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| 19 | but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 20 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 21 | GNU General Public License for more details.
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| 22 |
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| 23 | You should have received a copy of the GNU General Public License
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| 24 | along with this program; if not, write to the Free Software
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| 25 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
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| 26 |
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| 27 | #define TARGET_IS_${EMULATION_NAME}
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| 28 |
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| 29 | #include "bfd.h"
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| 30 | #include "sysdep.h"
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| 31 | #include "bfdlink.h"
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| 32 | #include "getopt.h"
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| 33 |
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| 34 | #include "ld.h"
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| 35 | #include "ldmain.h"
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| 36 | #include "ldmisc.h"
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| 37 |
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| 38 | #include "ldexp.h"
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| 39 | #include "ldlang.h"
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| 40 | #include "ldfile.h"
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| 41 | #include "ldemul.h"
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| 42 |
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| 43 | static void gld${EMULATION_NAME}_before_parse PARAMS ((void));
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| 44 | static void gld${EMULATION_NAME}_before_allocation PARAMS ((void));
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| 45 | static char *gld${EMULATION_NAME}_get_script PARAMS ((int *isfile));
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| 46 | static void gld${EMULATION_NAME}_add_options
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| 47 | PARAMS ((int, char **, int, struct option **, int, struct option **));
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| 48 | static void gld${EMULATION_NAME}_list_options PARAMS ((FILE *));
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| 49 | static bfd_boolean gld${EMULATION_NAME}_handle_option PARAMS ((int));
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| 50 | static void gld${EMULATION_NAME}_finish PARAMS ((void));
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| 51 | static void gld${EMULATION_NAME}_after_open PARAMS ((void));
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| 52 |
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| 53 | /* If TRUE, then interworking stubs which support calls to old, non-interworking
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| 54 | aware ARM code should be generated. */
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| 55 |
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| 56 | static int support_old_code = 0;
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| 57 | static char * thumb_entry_symbol = NULL;
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| 58 |
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| 59 | #define OPTION_SUPPORT_OLD_CODE 300
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| 60 | #define OPTION_THUMB_ENTRY 301
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| 61 |
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| 62 | static void
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| 63 | gld${EMULATION_NAME}_add_options (ns, shortopts, nl, longopts, nrl, really_longopts)
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| 64 | int ns ATTRIBUTE_UNUSED;
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| 65 | char **shortopts ATTRIBUTE_UNUSED;
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| 66 | int nl;
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| 67 | struct option **longopts;
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| 68 | int nrl ATTRIBUTE_UNUSED;
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| 69 | struct option **really_longopts ATTRIBUTE_UNUSED;
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| 70 | {
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| 71 | static const struct option xtra_long[] = {
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| 72 | {"support-old-code", no_argument, NULL, OPTION_SUPPORT_OLD_CODE},
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| 73 | {"thumb-entry", required_argument, NULL, OPTION_THUMB_ENTRY},
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| 74 | {NULL, no_argument, NULL, 0}
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| 75 | };
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| 76 |
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| 77 | *longopts = (struct option *)
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| 78 | xrealloc (*longopts, nl * sizeof (struct option) + sizeof (xtra_long));
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| 79 | memcpy (*longopts + nl, &xtra_long, sizeof (xtra_long));
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| 80 | }
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| 81 |
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| 82 | static void
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| 83 | gld${EMULATION_NAME}_list_options (file)
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| 84 | FILE * file;
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| 85 | {
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| 86 | fprintf (file, _(" --support-old-code Support interworking with old code\n"));
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| 87 | fprintf (file, _(" --thumb-entry=<sym> Set the entry point to be Thumb symbol <sym>\n"));
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| 88 | }
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| 89 |
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| 90 | static bfd_boolean
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| 91 | gld${EMULATION_NAME}_handle_option (optc)
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| 92 | int optc;
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| 93 | {
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| 94 | switch (optc)
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| 95 | {
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| 96 | default:
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| 97 | return FALSE;
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| 98 |
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| 99 | case OPTION_SUPPORT_OLD_CODE:
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| 100 | support_old_code = 1;
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| 101 | break;
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| 102 |
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| 103 | case OPTION_THUMB_ENTRY:
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| 104 | thumb_entry_symbol = optarg;
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| 105 | break;
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| 106 | }
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| 107 |
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| 108 | return TRUE;
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| 109 | }
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| 110 | |
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| 111 |
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| 112 | static void
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| 113 | gld${EMULATION_NAME}_before_parse ()
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| 114 | {
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| 115 | #ifndef TARGET_ /* I.e., if not generic. */
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| 116 | ldfile_set_output_arch ("`echo ${ARCH}`");
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| 117 | #endif /* not TARGET_ */
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| 118 | }
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| 119 |
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| 120 | /* This is called after the sections have been attached to output
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| 121 | sections, but before any sizes or addresses have been set. */
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| 122 |
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| 123 | static void
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| 124 | gld${EMULATION_NAME}_before_allocation ()
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| 125 | {
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| 126 | /* we should be able to set the size of the interworking stub section */
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| 127 |
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| 128 | /* Here we rummage through the found bfds to collect glue information */
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| 129 | /* FIXME: should this be based on a command line option? krk@cygnus.com */
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| 130 | {
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| 131 | LANG_FOR_EACH_INPUT_STATEMENT (is)
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| 132 | {
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| 133 | if (! bfd_arm_process_before_allocation
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| 134 | (is->the_bfd, & link_info, support_old_code))
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| 135 | {
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| 136 | /* xgettext:c-format */
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| 137 | einfo (_("Errors encountered processing file %s"), is->filename);
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| 138 | }
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| 139 | }
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| 140 | }
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| 141 |
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| 142 | /* We have seen it all. Allocate it, and carry on */
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| 143 | bfd_arm_allocate_interworking_sections (& link_info);
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| 144 | }
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| 145 |
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| 146 | static void
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| 147 | gld${EMULATION_NAME}_after_open ()
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| 148 | {
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| 149 | if (strstr (bfd_get_target (output_bfd), "arm") == NULL)
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| 150 | {
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| 151 | /* The arm backend needs special fields in the output hash structure.
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| 152 | These will only be created if the output format is an arm format,
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| 153 | hence we do not support linking and changing output formats at the
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| 154 | same time. Use a link followed by objcopy to change output formats. */
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| 155 | einfo ("%F%X%P: error: cannot change output format whilst linking ARM binaries\n");
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| 156 | return;
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| 157 | }
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| 158 |
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| 159 | {
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| 160 | LANG_FOR_EACH_INPUT_STATEMENT (is)
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| 161 | {
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| 162 | if (bfd_arm_get_bfd_for_interworking (is->the_bfd, & link_info))
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| 163 | break;
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| 164 | }
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| 165 | }
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| 166 | }
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| 167 |
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| 168 | static void
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| 169 | gld${EMULATION_NAME}_finish PARAMS((void))
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| 170 | {
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| 171 | struct bfd_link_hash_entry * h;
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| 172 |
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| 173 | if (thumb_entry_symbol == NULL)
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| 174 | return;
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| 175 |
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| 176 | h = bfd_link_hash_lookup (link_info.hash, thumb_entry_symbol,
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| 177 | FALSE, FALSE, TRUE);
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| 178 |
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| 179 | if (h != (struct bfd_link_hash_entry *) NULL
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| 180 | && (h->type == bfd_link_hash_defined
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| 181 | || h->type == bfd_link_hash_defweak)
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| 182 | && h->u.def.section->output_section != NULL)
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| 183 | {
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| 184 | static char buffer[32];
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| 185 | bfd_vma val;
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| 186 |
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| 187 | /* Special procesing is required for a Thumb entry symbol. The
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| 188 | bottom bit of its address must be set. */
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| 189 | val = (h->u.def.value
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| 190 | + bfd_get_section_vma (output_bfd,
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| 191 | h->u.def.section->output_section)
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| 192 | + h->u.def.section->output_offset);
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| 193 |
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| 194 | val |= 1;
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| 195 |
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| 196 | /* Now convert this value into a string and store it in entry_symbol
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| 197 | where the lang_finish() function will pick it up. */
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| 198 | buffer[0] = '0';
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| 199 | buffer[1] = 'x';
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| 200 |
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| 201 | sprintf_vma (buffer + 2, val);
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| 202 |
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| 203 | if (entry_symbol.name != NULL && entry_from_cmdline)
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| 204 | einfo (_("%P: warning: '--thumb-entry %s' is overriding '-e %s'\n"),
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| 205 | thumb_entry_symbol, entry_symbol.name);
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| 206 | entry_symbol.name = buffer;
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| 207 | }
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| 208 | else
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| 209 | einfo (_("%P: warning: connot find thumb start symbol %s\n"), thumb_entry_symbol);
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| 210 | }
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| 211 |
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| 212 | static char *
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| 213 | gld${EMULATION_NAME}_get_script (isfile)
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| 214 | int *isfile;
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| 215 | EOF
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| 216 |
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| 217 | if test -n "$COMPILE_IN"
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| 218 | then
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| 219 | # Scripts compiled in.
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| 220 |
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| 221 | # sed commands to quote an ld script as a C string.
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| 222 | sc="-f stringify.sed"
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| 223 |
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| 224 | cat >>e${EMULATION_NAME}.c <<EOF
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| 225 | {
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| 226 | *isfile = 0;
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| 227 |
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| 228 | if (link_info.relocateable && config.build_constructors)
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| 229 | return
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| 230 | EOF
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| 231 | sed $sc ldscripts/${EMULATION_NAME}.xu >> e${EMULATION_NAME}.c
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| 232 | echo ' ; else if (link_info.relocateable) return' >> e${EMULATION_NAME}.c
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| 233 | sed $sc ldscripts/${EMULATION_NAME}.xr >> e${EMULATION_NAME}.c
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| 234 | echo ' ; else if (!config.text_read_only) return' >> e${EMULATION_NAME}.c
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| 235 | sed $sc ldscripts/${EMULATION_NAME}.xbn >> e${EMULATION_NAME}.c
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| 236 | echo ' ; else if (!config.magic_demand_paged) return' >> e${EMULATION_NAME}.c
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| 237 | sed $sc ldscripts/${EMULATION_NAME}.xn >> e${EMULATION_NAME}.c
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| 238 | echo ' ; else return' >> e${EMULATION_NAME}.c
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| 239 | sed $sc ldscripts/${EMULATION_NAME}.x >> e${EMULATION_NAME}.c
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| 240 | echo '; }' >> e${EMULATION_NAME}.c
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| 241 |
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| 242 | else
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| 243 | # Scripts read from the filesystem.
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| 244 |
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| 245 | cat >>e${EMULATION_NAME}.c <<EOF
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| 246 | {
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| 247 | *isfile = 1;
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| 248 |
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| 249 | if (link_info.relocateable && config.build_constructors)
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| 250 | return "ldscripts/${EMULATION_NAME}.xu";
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| 251 | else if (link_info.relocateable)
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| 252 | return "ldscripts/${EMULATION_NAME}.xr";
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| 253 | else if (!config.text_read_only)
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| 254 | return "ldscripts/${EMULATION_NAME}.xbn";
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| 255 | else if (!config.magic_demand_paged)
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| 256 | return "ldscripts/${EMULATION_NAME}.xn";
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| 257 | else
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| 258 | return "ldscripts/${EMULATION_NAME}.x";
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| 259 | }
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| 260 | EOF
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| 261 |
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| 262 | fi
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| 263 |
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| 264 | cat >>e${EMULATION_NAME}.c <<EOF
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| 265 |
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| 266 | struct ld_emulation_xfer_struct ld_${EMULATION_NAME}_emulation =
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| 267 | {
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| 268 | gld${EMULATION_NAME}_before_parse,
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| 269 | syslib_default,
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| 270 | hll_default,
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| 271 | after_parse_default,
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| 272 | gld${EMULATION_NAME}_after_open,
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| 273 | after_allocation_default,
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| 274 | set_output_arch_default,
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| 275 | ldemul_default_target,
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| 276 | gld${EMULATION_NAME}_before_allocation,
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| 277 | gld${EMULATION_NAME}_get_script,
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| 278 | "${EMULATION_NAME}",
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| 279 | "${OUTPUT_FORMAT}",
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| 280 | gld${EMULATION_NAME}_finish,
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| 281 | NULL, /* create output section statements */
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| 282 | NULL, /* open dynamic archive */
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| 283 | NULL, /* place orphan */
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| 284 | NULL, /* set symbols */
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| 285 | NULL, /* parse_args */
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| 286 | gld${EMULATION_NAME}_add_options,
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| 287 | gld${EMULATION_NAME}_handle_option,
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| 288 | NULL, /* unrecognised file */
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| 289 | gld${EMULATION_NAME}_list_options,
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| 290 | NULL, /* recognized file */
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| 291 | NULL, /* find_potential_libraries */
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| 292 | NULL /* new_vers_pattern */
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| 293 | };
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| 294 | EOF
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