ld/emultempl/armcoff.em

   1 # This shell script emits a C file. -*- C -*-
   2 # It does some substitutions.
   3 fragment <<EOF
   4 /* This file is is generated by a shell script.  DO NOT EDIT! */
   5
   6 /* emulate the original gld for the given ${EMULATION_NAME}
   7    Copyright 1991, 1993, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
   8    2004, 2005, 2006, 2007, 2008 Free Software Foundation, Inc.
   9    Written by Steve Chamberlain steve@cygnus.com
  10
  11    This file is part of the GNU Binutils.
  12
  13    This program is free software; you can redistribute it and/or modify
  14    it under the terms of the GNU General Public License as published by
  15    the Free Software Foundation; either version 3 of the License, or
  16    (at your option) any later version.
  17
  18    This program is distributed in the hope that it will be useful,
  19    but WITHOUT ANY WARRANTY; without even the implied warranty of
  20    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  21    GNU General Public License for more details.
  22
  23    You should have received a copy of the GNU General Public License
  24    along with this program; if not, write to the Free Software
  25    Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
  26    MA 02110-1301, USA.  */
  27
  28 #define TARGET_IS_${EMULATION_NAME}
  29
  30 #include "sysdep.h"
  31 #include "bfd.h"
  32 #include "bfdlink.h"
  33 #include "getopt.h"
  34
  35 #include "ld.h"
  36 #include "ldmain.h"
  37 #include "ldmisc.h"
  38
  39 #include "ldexp.h"
  40 #include "ldlang.h"
  41 #include "ldfile.h"
  42 #include "ldemul.h"
  43
  44 /* If TRUE, then interworking stubs which support calls to old,
  45    non-interworking aware ARM code should be generated.  */
  46
  47 static int support_old_code = 0;
  48 static char * thumb_entry_symbol = NULL;
  49
  50 #define OPTION_SUPPORT_OLD_CODE         300
  51 #define OPTION_THUMB_ENTRY              301
  52
  53 static void
  54 gld${EMULATION_NAME}_add_options
  55   (int ns ATTRIBUTE_UNUSED, char **shortopts ATTRIBUTE_UNUSED, int nl,
  56    struct option **longopts, int nrl ATTRIBUTE_UNUSED,
  57    struct option **really_longopts ATTRIBUTE_UNUSED)
  58 {
  59   static const struct option xtra_long[] = {
  60     {"support-old-code", no_argument, NULL, OPTION_SUPPORT_OLD_CODE},
  61     {"thumb-entry", required_argument, NULL, OPTION_THUMB_ENTRY},
  62     {NULL, no_argument, NULL, 0}
  63   };
  64
  65   *longopts = xrealloc (*longopts,
  66                         nl * sizeof (struct option) + sizeof (xtra_long));
  67   memcpy (*longopts + nl, &xtra_long, sizeof (xtra_long));
  68 }
  69
  70 static void
  71 gld${EMULATION_NAME}_list_options (FILE *file)
  72 {
  73   fprintf (file, _("  --support-old-code          Support interworking with old code\n"));
  74   fprintf (file, _("  --thumb-entry=<sym>         Set the entry point to be Thumb symbol <sym>\n"));
  75 }
  76
  77 static bfd_boolean
  78 gld${EMULATION_NAME}_handle_option (int optc)
  79 {
  80   switch (optc)
  81     {
  82     default:
  83       return FALSE;
  84
  85     case OPTION_SUPPORT_OLD_CODE:
  86       support_old_code = 1;
  87       break;
  88
  89     case OPTION_THUMB_ENTRY:
  90       thumb_entry_symbol = optarg;
  91       break;
  92     }
  93
  94   return TRUE;
  95 }
  96 \f
  97 static void
  98 gld${EMULATION_NAME}_before_parse (void)
  99 {
 100 #ifndef TARGET_                 /* I.e., if not generic.  */
 101   ldfile_set_output_arch ("`echo ${ARCH}`", bfd_arch_unknown);
 102 #endif /* not TARGET_ */
 103 }
 104
 105 /* This is called after the sections have been attached to output
 106    sections, but before any sizes or addresses have been set.  */
 107
 108 static void
 109 gld${EMULATION_NAME}_before_allocation (void)
 110 {
 111   /* we should be able to set the size of the interworking stub section */
 112
 113   /* Here we rummage through the found bfds to collect glue information */
 114   /* FIXME: should this be based on a command line option? krk@cygnus.com */
 115   {
 116     LANG_FOR_EACH_INPUT_STATEMENT (is)
 117       {
 118         if (! bfd_arm_process_before_allocation
 119             (is->the_bfd, & link_info, support_old_code))
 120           {
 121             /* xgettext:c-format */
 122             einfo (_("Errors encountered processing file %s"), is->filename);
 123           }
 124       }
 125   }
 126
 127   /* We have seen it all. Allocate it, and carry on */
 128   bfd_arm_allocate_interworking_sections (& link_info);
 129
 130   before_allocation_default ();
 131 }
 132
 133 static void
 134 gld${EMULATION_NAME}_after_open (void)
 135 {
 136   after_open_default ();
 137
 138   if (strstr (bfd_get_target (link_info.output_bfd), "arm") == NULL)
 139     {
 140       /* The arm backend needs special fields in the output hash structure.
 141          These will only be created if the output format is an arm format,
 142          hence we do not support linking and changing output formats at the
 143          same time.  Use a link followed by objcopy to change output formats.  */
 144       einfo ("%F%X%P: error: cannot change output format whilst linking ARM binaries\n");
 145       return;
 146     }
 147
 148   {
 149     LANG_FOR_EACH_INPUT_STATEMENT (is)
 150       {
 151         if (bfd_arm_get_bfd_for_interworking (is->the_bfd, & link_info))
 152           break;
 153       }
 154   }
 155 }
 156
 157 static void
 158 gld${EMULATION_NAME}_finish (void)
 159 {
 160   if (thumb_entry_symbol != NULL)
 161     {
 162       struct bfd_link_hash_entry * h;
 163
 164       h = bfd_link_hash_lookup (link_info.hash, thumb_entry_symbol,
 165                                 FALSE, FALSE, TRUE);
 166
 167       if (h != (struct bfd_link_hash_entry *) NULL
 168           && (h->type == bfd_link_hash_defined
 169               || h->type == bfd_link_hash_defweak)
 170           && h->u.def.section->output_section != NULL)
 171         {
 172           static char buffer[32];
 173           bfd_vma val;
 174
 175           /* Special procesing is required for a Thumb entry symbol.  The
 176              bottom bit of its address must be set.  */
 177           val = (h->u.def.value
 178                  + bfd_get_section_vma (link_info.output_bfd,
 179                                         h->u.def.section->output_section)
 180                  + h->u.def.section->output_offset);
 181
 182           val |= 1;
 183
 184           /* Now convert this value into a string and store it in entry_symbol
 185              where the lang_finish() function will pick it up.  */
 186           buffer[0] = '0';
 187           buffer[1] = 'x';
 188
 189           sprintf_vma (buffer + 2, val);
 190
 191           if (entry_symbol.name != NULL && entry_from_cmdline)
 192             einfo (_("%P: warning: '--thumb-entry %s' is overriding '-e %s'\n"),
 193                    thumb_entry_symbol, entry_symbol.name);
 194           entry_symbol.name = buffer;
 195         }
 196       else
 197         einfo (_("%P: warning: cannot find thumb start symbol %s\n"),
 198                thumb_entry_symbol);
 199     }
 200
 201   finish_default ();
 202 }
 203
 204 static char *
 205 gld${EMULATION_NAME}_get_script (int *isfile)
 206 EOF
 207
 208 if test -n "$COMPILE_IN"
 209 then
 210 # Scripts compiled in.
 211
 212 # sed commands to quote an ld script as a C string.
 213 sc="-f stringify.sed"
 214
 215 fragment <<EOF
 216 {
 217   *isfile = 0;
 218
 219   if (link_info.relocatable && config.build_constructors)
 220     return
 221 EOF
 222 sed $sc ldscripts/${EMULATION_NAME}.xu                 >> e${EMULATION_NAME}.c
 223 echo '  ; else if (link_info.relocatable) return'     >> e${EMULATION_NAME}.c
 224 sed $sc ldscripts/${EMULATION_NAME}.xr                 >> e${EMULATION_NAME}.c
 225 echo '  ; else if (!config.text_read_only) return'     >> e${EMULATION_NAME}.c
 226 sed $sc ldscripts/${EMULATION_NAME}.xbn                >> e${EMULATION_NAME}.c
 227 echo '  ; else if (!config.magic_demand_paged) return' >> e${EMULATION_NAME}.c
 228 sed $sc ldscripts/${EMULATION_NAME}.xn                 >> e${EMULATION_NAME}.c
 229 echo '  ; else return'                                 >> e${EMULATION_NAME}.c
 230 sed $sc ldscripts/${EMULATION_NAME}.x                  >> e${EMULATION_NAME}.c
 231 echo '; }'                                             >> e${EMULATION_NAME}.c
 232
 233 else
 234 # Scripts read from the filesystem.
 235
 236 fragment <<EOF
 237 {
 238   *isfile = 1;
 239
 240   if (link_info.relocatable && config.build_constructors)
 241     return "ldscripts/${EMULATION_NAME}.xu";
 242   else if (link_info.relocatable)
 243     return "ldscripts/${EMULATION_NAME}.xr";
 244   else if (!config.text_read_only)
 245     return "ldscripts/${EMULATION_NAME}.xbn";
 246   else if (!config.magic_demand_paged)
 247     return "ldscripts/${EMULATION_NAME}.xn";
 248   else
 249     return "ldscripts/${EMULATION_NAME}.x";
 250 }
 251 EOF
 252
 253 fi
 254
 255 fragment <<EOF
 256
 257 struct ld_emulation_xfer_struct ld_${EMULATION_NAME}_emulation =
 258 {
 259   gld${EMULATION_NAME}_before_parse,
 260   syslib_default,
 261   hll_default,
 262   after_parse_default,
 263   gld${EMULATION_NAME}_after_open,
 264   after_allocation_default,
 265   set_output_arch_default,
 266   ldemul_default_target,
 267   gld${EMULATION_NAME}_before_allocation,
 268   gld${EMULATION_NAME}_get_script,
 269   "${EMULATION_NAME}",
 270   "${OUTPUT_FORMAT}",
 271   gld${EMULATION_NAME}_finish,
 272   NULL, /* create output section statements */
 273   NULL, /* open dynamic archive */
 274   NULL, /* place orphan */
 275   NULL, /* set symbols */
 276   NULL, /* parse_args */
 277   gld${EMULATION_NAME}_add_options,
 278   gld${EMULATION_NAME}_handle_option,
 279   NULL, /* unrecognised file */
 280   gld${EMULATION_NAME}_list_options,
 281   NULL, /* recognized file */
 282   NULL, /* find_potential_libraries */
 283   NULL  /* new_vers_pattern */
 284 };
 285 EOF