contrib/binutils/ld/emultempl/armcoff.em

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