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 ${EMULATION_NAME}
   7    Copyright (C) 1991-2018 Free Software Foundation, Inc.
   8    Written by Steve Chamberlain steve@cygnus.com
   9
  10    This file is part of the GNU Binutils.
  11
  12    This program is free software; you can redistribute it and/or modify
  13    it under the terms of the GNU General Public License as published by
  14    the Free Software Foundation; either version 3 of the License, or
  15    (at your option) any later version.
  16
  17    This program is distributed in the hope that it will be useful,
  18    but WITHOUT ANY WARRANTY; without even the implied warranty of
  19    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20    GNU General Public License for more details.
  21
  22    You should have received a copy of the GNU General Public License
  23    along with this program; if not, write to the Free Software
  24    Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
  25    MA 02110-1301, USA.  */
  26
  27 #define TARGET_IS_${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${EMULATION_NAME}_after_open (void)
 134 {
 135   after_open_default ();
 136
 137   if (strstr (bfd_get_target (link_info.output_bfd), "arm") == NULL)
 138     {
 139       /* The arm backend needs special fields in the output hash structure.
 140          These will only be created if the output format is an arm format,
 141          hence we do not support linking and changing output formats at the
 142          same time.  Use a link followed by objcopy to change output formats.  */
 143       einfo (_("%F%X%P: error: cannot change output format "
 144                "whilst linking ARM binaries\n"));
 145       return;
 146     }
 147
 148   {
 149     LANG_FOR_EACH_INPUT_STATEMENT (is)
 150       {
 151         if (bfd_arm_get_bfd_for_interworking (is->the_bfd, & link_info))
 152           break;
 153       }
 154   }
 155 }
 156
 157 static void
 158 gld${EMULATION_NAME}_finish (void)
 159 {
 160   if (thumb_entry_symbol != NULL)
 161     {
 162       struct bfd_link_hash_entry * h;
 163
 164       h = bfd_link_hash_lookup (link_info.hash, thumb_entry_symbol,
 165                                 FALSE, FALSE, TRUE);
 166
 167       if (h != (struct bfd_link_hash_entry *) NULL
 168           && (h->type == bfd_link_hash_defined
 169               || h->type == bfd_link_hash_defweak)
 170           && h->u.def.section->output_section != NULL)
 171         {
 172           static char buffer[32];
 173           bfd_vma val;
 174
 175           /* Special procesing is required for a Thumb entry symbol.  The
 176              bottom bit of its address must be set.  */
 177           val = (h->u.def.value
 178                  + bfd_get_section_vma (link_info.output_bfd,
 179                                         h->u.def.section->output_section)
 180                  + h->u.def.section->output_offset);
 181
 182           val |= 1;
 183
 184           /* Now convert this value into a string and store it in entry_symbol
 185              where the lang_finish() function will pick it up.  */
 186           buffer[0] = '0';
 187           buffer[1] = 'x';
 188
 189           sprintf_vma (buffer + 2, val);
 190
 191           if (entry_symbol.name != NULL && entry_from_cmdline)
 192             einfo (_("%P: warning: '--thumb-entry %s' is overriding '-e %s'\n"),
 193                    thumb_entry_symbol, entry_symbol.name);
 194           entry_symbol.name = buffer;
 195         }
 196       else
 197         einfo (_("%P: warning: cannot find thumb start symbol %s\n"),
 198                thumb_entry_symbol);
 199     }
 200
 201   finish_default ();
 202 }
 203
 204 static char *
 205 gld${EMULATION_NAME}_get_script (int *isfile)
 206 EOF
 207
 208 if test x"$COMPILE_IN" = xyes
 209 then
 210 # Scripts compiled in.
 211
 212 # sed commands to quote an ld script as a C string.
 213 sc="-f stringify.sed"
 214
 215 fragment <<EOF
 216 {
 217   *isfile = 0;
 218
 219   if (bfd_link_relocatable (&link_info) && config.build_constructors)
 220     return
 221 EOF
 222 sed $sc ldscripts/${EMULATION_NAME}.xu                 >> e${EMULATION_NAME}.c
 223 echo '  ; else if (bfd_link_relocatable (&link_info)) return' >> e${EMULATION_NAME}.c
 224 sed $sc ldscripts/${EMULATION_NAME}.xr                 >> e${EMULATION_NAME}.c
 225 echo '  ; else if (!config.text_read_only) return'     >> e${EMULATION_NAME}.c
 226 sed $sc ldscripts/${EMULATION_NAME}.xbn                >> e${EMULATION_NAME}.c
 227 echo '  ; else if (!config.magic_demand_paged) return' >> e${EMULATION_NAME}.c
 228 sed $sc ldscripts/${EMULATION_NAME}.xn                 >> e${EMULATION_NAME}.c
 229 echo '  ; else return'                                 >> e${EMULATION_NAME}.c
 230 sed $sc ldscripts/${EMULATION_NAME}.x                  >> e${EMULATION_NAME}.c
 231 echo '; }'                                             >> e${EMULATION_NAME}.c
 232
 233 else
 234 # Scripts read from the filesystem.
 235
 236 fragment <<EOF
 237 {
 238   *isfile = 1;
 239
 240   if (bfd_link_relocatable (&link_info) && config.build_constructors)
 241     return "ldscripts/${EMULATION_NAME}.xu";
 242   else if (bfd_link_relocatable (&link_info))
 243     return "ldscripts/${EMULATION_NAME}.xr";
 244   else if (!config.text_read_only)
 245     return "ldscripts/${EMULATION_NAME}.xbn";
 246   else if (!config.magic_demand_paged)
 247     return "ldscripts/${EMULATION_NAME}.xn";
 248   else
 249     return "ldscripts/${EMULATION_NAME}.x";
 250 }
 251 EOF
 252
 253 fi
 254
 255 fragment <<EOF
 256
 257 struct ld_emulation_xfer_struct ld_${EMULATION_NAME}_emulation =
 258 {
 259   gld${EMULATION_NAME}_before_parse,
 260   syslib_default,
 261   hll_default,
 262   after_parse_default,
 263   gld${EMULATION_NAME}_after_open,
 264   after_check_relocs_default,
 265   after_allocation_default,
 266   set_output_arch_default,
 267   ldemul_default_target,
 268   gld${EMULATION_NAME}_before_allocation,
 269   gld${EMULATION_NAME}_get_script,
 270   "${EMULATION_NAME}",
 271   "${OUTPUT_FORMAT}",
 272   gld${EMULATION_NAME}_finish,
 273   NULL, /* create output section statements */
 274   NULL, /* open dynamic archive */
 275   NULL, /* place orphan */
 276   NULL, /* set symbols */
 277   NULL, /* parse_args */
 278   gld${EMULATION_NAME}_add_options,
 279   gld${EMULATION_NAME}_handle_option,
 280   NULL, /* unrecognised file */
 281   gld${EMULATION_NAME}_list_options,
 282   NULL, /* recognized file */
 283   NULL, /* find_potential_libraries */
 284   NULL, /* new_vers_pattern */
 285   NULL  /* extra_map_file_text */
 286 };
 287 EOF