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   if (!link_info.relocatable)
 130     strip_excluded_output_sections ();
 131 }
 132
 133 static void
 134 gld${EMULATION_NAME}_after_open (void)
 135 {
 136   if (strstr (bfd_get_target (output_bfd), "arm") == NULL)
 137     {
 138       /* The arm backend needs special fields in the output hash structure.
 139          These will only be created if the output format is an arm format,
 140          hence we do not support linking and changing output formats at the
 141          same time.  Use a link followed by objcopy to change output formats.  */
 142       einfo ("%F%X%P: error: cannot change output format whilst linking ARM binaries\n");
 143       return;
 144     }
 145
 146   {
 147     LANG_FOR_EACH_INPUT_STATEMENT (is)
 148       {
 149         if (bfd_arm_get_bfd_for_interworking (is->the_bfd, & link_info))
 150           break;
 151       }
 152   }
 153 }
 154
 155 static void
 156 gld${EMULATION_NAME}_finish (void)
 157 {
 158   struct bfd_link_hash_entry * h;
 159
 160   if (thumb_entry_symbol == NULL)
 161     return;
 162
 163   h = bfd_link_hash_lookup (link_info.hash, thumb_entry_symbol,
 164                             FALSE, FALSE, TRUE);
 165
 166   if (h != (struct bfd_link_hash_entry *) NULL
 167       && (h->type == bfd_link_hash_defined
 168           || h->type == bfd_link_hash_defweak)
 169       && h->u.def.section->output_section != NULL)
 170     {
 171       static char buffer[32];
 172       bfd_vma val;
 173
 174       /* Special procesing is required for a Thumb entry symbol.  The
 175          bottom bit of its address must be set.  */
 176       val = (h->u.def.value
 177              + bfd_get_section_vma (output_bfd,
 178                                     h->u.def.section->output_section)
 179              + h->u.def.section->output_offset);
 180
 181       val |= 1;
 182
 183       /* Now convert this value into a string and store it in entry_symbol
 184          where the lang_finish() function will pick it up.  */
 185       buffer[0] = '0';
 186       buffer[1] = 'x';
 187
 188       sprintf_vma (buffer + 2, val);
 189
 190       if (entry_symbol.name != NULL && entry_from_cmdline)
 191         einfo (_("%P: warning: '--thumb-entry %s' is overriding '-e %s'\n"),
 192                thumb_entry_symbol, entry_symbol.name);
 193       entry_symbol.name = buffer;
 194     }
 195   else
 196     einfo (_("%P: warning: connot find thumb start symbol %s\n"), thumb_entry_symbol);
 197 }
 198
 199 static char *
 200 gld${EMULATION_NAME}_get_script (int *isfile)
 201 EOF
 202
 203 if test -n "$COMPILE_IN"
 204 then
 205 # Scripts compiled in.
 206
 207 # sed commands to quote an ld script as a C string.
 208 sc="-f stringify.sed"
 209
 210 cat >>e${EMULATION_NAME}.c <<EOF
 211 {
 212   *isfile = 0;
 213
 214   if (link_info.relocatable && config.build_constructors)
 215     return
 216 EOF
 217 sed $sc ldscripts/${EMULATION_NAME}.xu                 >> e${EMULATION_NAME}.c
 218 echo '  ; else if (link_info.relocatable) return'     >> e${EMULATION_NAME}.c
 219 sed $sc ldscripts/${EMULATION_NAME}.xr                 >> e${EMULATION_NAME}.c
 220 echo '  ; else if (!config.text_read_only) return'     >> e${EMULATION_NAME}.c
 221 sed $sc ldscripts/${EMULATION_NAME}.xbn                >> e${EMULATION_NAME}.c
 222 echo '  ; else if (!config.magic_demand_paged) return' >> e${EMULATION_NAME}.c
 223 sed $sc ldscripts/${EMULATION_NAME}.xn                 >> e${EMULATION_NAME}.c
 224 echo '  ; else return'                                 >> e${EMULATION_NAME}.c
 225 sed $sc ldscripts/${EMULATION_NAME}.x                  >> e${EMULATION_NAME}.c
 226 echo '; }'                                             >> e${EMULATION_NAME}.c
 227
 228 else
 229 # Scripts read from the filesystem.
 230
 231 cat >>e${EMULATION_NAME}.c <<EOF
 232 {
 233   *isfile = 1;
 234
 235   if (link_info.relocatable && config.build_constructors)
 236     return "ldscripts/${EMULATION_NAME}.xu";
 237   else if (link_info.relocatable)
 238     return "ldscripts/${EMULATION_NAME}.xr";
 239   else if (!config.text_read_only)
 240     return "ldscripts/${EMULATION_NAME}.xbn";
 241   else if (!config.magic_demand_paged)
 242     return "ldscripts/${EMULATION_NAME}.xn";
 243   else
 244     return "ldscripts/${EMULATION_NAME}.x";
 245 }
 246 EOF
 247
 248 fi
 249
 250 cat >>e${EMULATION_NAME}.c <<EOF
 251
 252 struct ld_emulation_xfer_struct ld_${EMULATION_NAME}_emulation =
 253 {
 254   gld${EMULATION_NAME}_before_parse,
 255   syslib_default,
 256   hll_default,
 257   after_parse_default,
 258   gld${EMULATION_NAME}_after_open,
 259   after_allocation_default,
 260   set_output_arch_default,
 261   ldemul_default_target,
 262   gld${EMULATION_NAME}_before_allocation,
 263   do_assignments_default,
 264   gld${EMULATION_NAME}_get_script,
 265   "${EMULATION_NAME}",
 266   "${OUTPUT_FORMAT}",
 267   gld${EMULATION_NAME}_finish,
 268   NULL, /* create output section statements */
 269   NULL, /* open dynamic archive */
 270   NULL, /* place orphan */
 271   NULL, /* set symbols */
 272   NULL, /* parse_args */
 273   gld${EMULATION_NAME}_add_options,
 274   gld${EMULATION_NAME}_handle_option,
 275   NULL, /* unrecognised file */
 276   gld${EMULATION_NAME}_list_options,
 277   NULL, /* recognized file */
 278   NULL, /* find_potential_libraries */
 279   NULL  /* new_vers_pattern */
 280 };
 281 EOF