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 ${EMULATION_NAME}
   7    Copyright 1991, 1993, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
   8    2004 Free Software Foundation, Inc.
   9    Written by Steve Chamberlain steve@cygnus.com
  10
  11 This file is part of GLD, the Gnu Linker.
  12
  13 This program is free software; you can redistribute it and/or modify
  14 it under the terms of the GNU General Public License as published by
  15 the Free Software Foundation; either version 2 of the License, or
  16 (at your option) any later version.
  17
  18 This program is distributed in the hope that it will be useful,
  19 but WITHOUT ANY WARRANTY; without even the implied warranty of
  20 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  21 GNU General Public License for more details.
  22
  23 You should have received a copy of the GNU General Public License
  24 along with this program; if not, write to the Free Software
  25 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
  26
  27 #define TARGET_IS_${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 /* 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
 130 static void
 131 gld${EMULATION_NAME}_after_open (void)
 132 {
 133   if (strstr (bfd_get_target (output_bfd), "arm") == NULL)
 134     {
 135       /* The arm backend needs special fields in the output hash structure.
 136          These will only be created if the output format is an arm format,
 137          hence we do not support linking and changing output formats at the
 138          same time.  Use a link followed by objcopy to change output formats.  */
 139       einfo ("%F%X%P: error: cannot change output format whilst linking ARM binaries\n");
 140       return;
 141     }
 142
 143   {
 144     LANG_FOR_EACH_INPUT_STATEMENT (is)
 145       {
 146         if (bfd_arm_get_bfd_for_interworking (is->the_bfd, & link_info))
 147           break;
 148       }
 149   }
 150 }
 151
 152 static void
 153 gld${EMULATION_NAME}_finish (void)
 154 {
 155   struct bfd_link_hash_entry * h;
 156
 157   if (thumb_entry_symbol == NULL)
 158     return;
 159
 160   h = bfd_link_hash_lookup (link_info.hash, thumb_entry_symbol,
 161                             FALSE, FALSE, TRUE);
 162
 163   if (h != (struct bfd_link_hash_entry *) NULL
 164       && (h->type == bfd_link_hash_defined
 165           || h->type == bfd_link_hash_defweak)
 166       && h->u.def.section->output_section != NULL)
 167     {
 168       static char buffer[32];
 169       bfd_vma val;
 170
 171       /* Special procesing is required for a Thumb entry symbol.  The
 172          bottom bit of its address must be set.  */
 173       val = (h->u.def.value
 174              + bfd_get_section_vma (output_bfd,
 175                                     h->u.def.section->output_section)
 176              + h->u.def.section->output_offset);
 177
 178       val |= 1;
 179
 180       /* Now convert this value into a string and store it in entry_symbol
 181          where the lang_finish() function will pick it up.  */
 182       buffer[0] = '0';
 183       buffer[1] = 'x';
 184
 185       sprintf_vma (buffer + 2, val);
 186
 187       if (entry_symbol.name != NULL && entry_from_cmdline)
 188         einfo (_("%P: warning: '--thumb-entry %s' is overriding '-e %s'\n"),
 189                thumb_entry_symbol, entry_symbol.name);
 190       entry_symbol.name = buffer;
 191     }
 192   else
 193     einfo (_("%P: warning: connot find thumb start symbol %s\n"), thumb_entry_symbol);
 194 }
 195
 196 static char *
 197 gld${EMULATION_NAME}_get_script (int *isfile)
 198 EOF
 199
 200 if test -n "$COMPILE_IN"
 201 then
 202 # Scripts compiled in.
 203
 204 # sed commands to quote an ld script as a C string.
 205 sc="-f stringify.sed"
 206
 207 cat >>e${EMULATION_NAME}.c <<EOF
 208 {
 209   *isfile = 0;
 210
 211   if (link_info.relocatable && config.build_constructors)
 212     return
 213 EOF
 214 sed $sc ldscripts/${EMULATION_NAME}.xu                 >> e${EMULATION_NAME}.c
 215 echo '  ; else if (link_info.relocatable) return'     >> e${EMULATION_NAME}.c
 216 sed $sc ldscripts/${EMULATION_NAME}.xr                 >> e${EMULATION_NAME}.c
 217 echo '  ; else if (!config.text_read_only) return'     >> e${EMULATION_NAME}.c
 218 sed $sc ldscripts/${EMULATION_NAME}.xbn                >> e${EMULATION_NAME}.c
 219 echo '  ; else if (!config.magic_demand_paged) return' >> e${EMULATION_NAME}.c
 220 sed $sc ldscripts/${EMULATION_NAME}.xn                 >> e${EMULATION_NAME}.c
 221 echo '  ; else return'                                 >> e${EMULATION_NAME}.c
 222 sed $sc ldscripts/${EMULATION_NAME}.x                  >> e${EMULATION_NAME}.c
 223 echo '; }'                                             >> e${EMULATION_NAME}.c
 224
 225 else
 226 # Scripts read from the filesystem.
 227
 228 cat >>e${EMULATION_NAME}.c <<EOF
 229 {
 230   *isfile = 1;
 231
 232   if (link_info.relocatable && config.build_constructors)
 233     return "ldscripts/${EMULATION_NAME}.xu";
 234   else if (link_info.relocatable)
 235     return "ldscripts/${EMULATION_NAME}.xr";
 236   else if (!config.text_read_only)
 237     return "ldscripts/${EMULATION_NAME}.xbn";
 238   else if (!config.magic_demand_paged)
 239     return "ldscripts/${EMULATION_NAME}.xn";
 240   else
 241     return "ldscripts/${EMULATION_NAME}.x";
 242 }
 243 EOF
 244
 245 fi
 246
 247 cat >>e${EMULATION_NAME}.c <<EOF
 248
 249 struct ld_emulation_xfer_struct ld_${EMULATION_NAME}_emulation =
 250 {
 251   gld${EMULATION_NAME}_before_parse,
 252   syslib_default,
 253   hll_default,
 254   after_parse_default,
 255   gld${EMULATION_NAME}_after_open,
 256   after_allocation_default,
 257   set_output_arch_default,
 258   ldemul_default_target,
 259   gld${EMULATION_NAME}_before_allocation,
 260   gld${EMULATION_NAME}_get_script,
 261   "${EMULATION_NAME}",
 262   "${OUTPUT_FORMAT}",
 263   gld${EMULATION_NAME}_finish,
 264   NULL, /* create output section statements */
 265   NULL, /* open dynamic archive */
 266   NULL, /* place orphan */
 267   NULL, /* set symbols */
 268   NULL, /* parse_args */
 269   gld${EMULATION_NAME}_add_options,
 270   gld${EMULATION_NAME}_handle_option,
 271   NULL, /* unrecognised file */
 272   gld${EMULATION_NAME}_list_options,
 273   NULL, /* recognized file */
 274   NULL, /* find_potential_libraries */
 275   NULL  /* new_vers_pattern */
 276 };
 277 EOF