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 ${EMULATION_NAME}
   7    Copyright (C) 1991-2015 Free Software Foundation, Inc.
   8    Written by Steve Chamberlain steve@cygnus.com
   9
  10    This file is part of the GNU Binutils.
  11
  12    This program is free software; you can redistribute it and/or modify
  13    it under the terms of the GNU General Public License as published by
  14    the Free Software Foundation; either version 3 of the License, or
  15    (at your option) any later version.
  16
  17    This program is distributed in the hope that it will be useful,
  18    but WITHOUT ANY WARRANTY; without even the implied warranty of
  19    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20    GNU General Public License for more details.
  21
  22    You should have received a copy of the GNU General Public License
  23    along with this program; if not, write to the Free Software
  24    Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
  25    MA 02110-1301, USA.  */
  26
  27 #define TARGET_IS_${EMULATION_NAME}
  28
  29 #include "sysdep.h"
  30 #include "bfd.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${EMULATION_NAME}_after_open (void)
 134 {
 135   after_open_default ();
 136
 137   if (strstr (bfd_get_target (link_info.output_bfd), "arm") == NULL)
 138     {
 139       /* The arm backend needs special fields in the output hash structure.
 140          These will only be created if the output format is an arm format,
 141          hence we do not support linking and changing output formats at the
 142          same time.  Use a link followed by objcopy to change output formats.  */
 143       einfo ("%F%X%P: error: cannot change output format whilst linking ARM binaries\n");
 144       return;
 145     }
 146
 147   {
 148     LANG_FOR_EACH_INPUT_STATEMENT (is)
 149       {
 150         if (bfd_arm_get_bfd_for_interworking (is->the_bfd, & link_info))
 151           break;
 152       }
 153   }
 154 }
 155
 156 static void
 157 gld${EMULATION_NAME}_finish (void)
 158 {
 159   if (thumb_entry_symbol != NULL)
 160     {
 161       struct bfd_link_hash_entry * h;
 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 (link_info.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: cannot find thumb start symbol %s\n"),
 197                thumb_entry_symbol);
 198     }
 199
 200   finish_default ();
 201 }
 202
 203 static char *
 204 gld${EMULATION_NAME}_get_script (int *isfile)
 205 EOF
 206
 207 if test x"$COMPILE_IN" = xyes
 208 then
 209 # Scripts compiled in.
 210
 211 # sed commands to quote an ld script as a C string.
 212 sc="-f stringify.sed"
 213
 214 fragment <<EOF
 215 {
 216   *isfile = 0;
 217
 218   if (link_info.relocatable && config.build_constructors)
 219     return
 220 EOF
 221 sed $sc ldscripts/${EMULATION_NAME}.xu                 >> e${EMULATION_NAME}.c
 222 echo '  ; else if (link_info.relocatable) return'     >> e${EMULATION_NAME}.c
 223 sed $sc ldscripts/${EMULATION_NAME}.xr                 >> e${EMULATION_NAME}.c
 224 echo '  ; else if (!config.text_read_only) return'     >> e${EMULATION_NAME}.c
 225 sed $sc ldscripts/${EMULATION_NAME}.xbn                >> e${EMULATION_NAME}.c
 226 echo '  ; else if (!config.magic_demand_paged) return' >> e${EMULATION_NAME}.c
 227 sed $sc ldscripts/${EMULATION_NAME}.xn                 >> e${EMULATION_NAME}.c
 228 echo '  ; else return'                                 >> e${EMULATION_NAME}.c
 229 sed $sc ldscripts/${EMULATION_NAME}.x                  >> e${EMULATION_NAME}.c
 230 echo '; }'                                             >> e${EMULATION_NAME}.c
 231
 232 else
 233 # Scripts read from the filesystem.
 234
 235 fragment <<EOF
 236 {
 237   *isfile = 1;
 238
 239   if (link_info.relocatable && config.build_constructors)
 240     return "ldscripts/${EMULATION_NAME}.xu";
 241   else if (link_info.relocatable)
 242     return "ldscripts/${EMULATION_NAME}.xr";
 243   else if (!config.text_read_only)
 244     return "ldscripts/${EMULATION_NAME}.xbn";
 245   else if (!config.magic_demand_paged)
 246     return "ldscripts/${EMULATION_NAME}.xn";
 247   else
 248     return "ldscripts/${EMULATION_NAME}.x";
 249 }
 250 EOF
 251
 252 fi
 253
 254 fragment <<EOF
 255
 256 struct ld_emulation_xfer_struct ld_${EMULATION_NAME}_emulation =
 257 {
 258   gld${EMULATION_NAME}_before_parse,
 259   syslib_default,
 260   hll_default,
 261   after_parse_default,
 262   gld${EMULATION_NAME}_after_open,
 263   after_allocation_default,
 264   set_output_arch_default,
 265   ldemul_default_target,
 266   gld${EMULATION_NAME}_before_allocation,
 267   gld${EMULATION_NAME}_get_script,
 268   "${EMULATION_NAME}",
 269   "${OUTPUT_FORMAT}",
 270   gld${EMULATION_NAME}_finish,
 271   NULL, /* create output section statements */
 272   NULL, /* open dynamic archive */
 273   NULL, /* place orphan */
 274   NULL, /* set symbols */
 275   NULL, /* parse_args */
 276   gld${EMULATION_NAME}_add_options,
 277   gld${EMULATION_NAME}_handle_option,
 278   NULL, /* unrecognised file */
 279   gld${EMULATION_NAME}_list_options,
 280   NULL, /* recognized file */
 281   NULL, /* find_potential_libraries */
 282   NULL, /* new_vers_pattern */
 283   NULL  /* extra_map_file_text */
 284 };
 285 EOF