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   struct bfd_link_hash_entry * h;
 158
 159   if (thumb_entry_symbol == NULL)
 160     return;
 161
 162   h = bfd_link_hash_lookup (link_info.hash, thumb_entry_symbol,
 163                             FALSE, FALSE, TRUE);
 164
 165   if (h != (struct bfd_link_hash_entry *) NULL
 166       && (h->type == bfd_link_hash_defined
 167           || h->type == bfd_link_hash_defweak)
 168       && h->u.def.section->output_section != NULL)
 169     {
 170       static char buffer[32];
 171       bfd_vma val;
 172
 173       /* Special procesing is required for a Thumb entry symbol.  The
 174          bottom bit of its address must be set.  */
 175       val = (h->u.def.value
 176              + bfd_get_section_vma (output_bfd,
 177                                     h->u.def.section->output_section)
 178              + h->u.def.section->output_offset);
 179
 180       val |= 1;
 181
 182       /* Now convert this value into a string and store it in entry_symbol
 183          where the lang_finish() function will pick it up.  */
 184       buffer[0] = '0';
 185       buffer[1] = 'x';
 186
 187       sprintf_vma (buffer + 2, val);
 188
 189       if (entry_symbol.name != NULL && entry_from_cmdline)
 190         einfo (_("%P: warning: '--thumb-entry %s' is overriding '-e %s'\n"),
 191                thumb_entry_symbol, entry_symbol.name);
 192       entry_symbol.name = buffer;
 193     }
 194   else
 195     einfo (_("%P: warning: connot find thumb start symbol %s\n"), thumb_entry_symbol);
 196
 197   finish_default ();
 198 }
 199
 200 static char *
 201 gld${EMULATION_NAME}_get_script (int *isfile)
 202 EOF
 203
 204 if test -n "$COMPILE_IN"
 205 then
 206 # Scripts compiled in.
 207
 208 # sed commands to quote an ld script as a C string.
 209 sc="-f stringify.sed"
 210
 211 cat >>e${EMULATION_NAME}.c <<EOF
 212 {
 213   *isfile = 0;
 214
 215   if (link_info.relocatable && config.build_constructors)
 216     return
 217 EOF
 218 sed $sc ldscripts/${EMULATION_NAME}.xu                 >> e${EMULATION_NAME}.c
 219 echo '  ; else if (link_info.relocatable) return'     >> e${EMULATION_NAME}.c
 220 sed $sc ldscripts/${EMULATION_NAME}.xr                 >> e${EMULATION_NAME}.c
 221 echo '  ; else if (!config.text_read_only) return'     >> e${EMULATION_NAME}.c
 222 sed $sc ldscripts/${EMULATION_NAME}.xbn                >> e${EMULATION_NAME}.c
 223 echo '  ; else if (!config.magic_demand_paged) return' >> e${EMULATION_NAME}.c
 224 sed $sc ldscripts/${EMULATION_NAME}.xn                 >> e${EMULATION_NAME}.c
 225 echo '  ; else return'                                 >> e${EMULATION_NAME}.c
 226 sed $sc ldscripts/${EMULATION_NAME}.x                  >> e${EMULATION_NAME}.c
 227 echo '; }'                                             >> e${EMULATION_NAME}.c
 228
 229 else
 230 # Scripts read from the filesystem.
 231
 232 cat >>e${EMULATION_NAME}.c <<EOF
 233 {
 234   *isfile = 1;
 235
 236   if (link_info.relocatable && config.build_constructors)
 237     return "ldscripts/${EMULATION_NAME}.xu";
 238   else if (link_info.relocatable)
 239     return "ldscripts/${EMULATION_NAME}.xr";
 240   else if (!config.text_read_only)
 241     return "ldscripts/${EMULATION_NAME}.xbn";
 242   else if (!config.magic_demand_paged)
 243     return "ldscripts/${EMULATION_NAME}.xn";
 244   else
 245     return "ldscripts/${EMULATION_NAME}.x";
 246 }
 247 EOF
 248
 249 fi
 250
 251 cat >>e${EMULATION_NAME}.c <<EOF
 252
 253 struct ld_emulation_xfer_struct ld_${EMULATION_NAME}_emulation =
 254 {
 255   gld${EMULATION_NAME}_before_parse,
 256   syslib_default,
 257   hll_default,
 258   after_parse_default,
 259   gld${EMULATION_NAME}_after_open,
 260   after_allocation_default,
 261   set_output_arch_default,
 262   ldemul_default_target,
 263   gld${EMULATION_NAME}_before_allocation,
 264   gld${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