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