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 ${EMULATION_NAME}
   7    Copyright (C) 1991-2019 Free Software Foundation, Inc.
   8    Written by Steve Chamberlain steve@cygnus.com
   9
  10    This file is part of the GNU Binutils.
  11
  12    This program is free software; you can redistribute it and/or modify
  13    it under the terms of the GNU General Public License as published by
  14    the Free Software Foundation; either version 3 of the License, or
  15    (at your option) any later version.
  16
  17    This program is distributed in the hope that it will be useful,
  18    but WITHOUT ANY WARRANTY; without even the implied warranty of
  19    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20    GNU General Public License for more details.
  21
  22    You should have received a copy of the GNU General Public License
  23    along with this program; if not, write to the Free Software
  24    Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
  25    MA 02110-1301, USA.  */
  26
  27 #define TARGET_IS_${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 (_("%P: errors encountered processing file %s\n"),
 122                    is->filename);
 123           }
 124       }
 125   }
 126
 127   /* We have seen it all. Allocate it, and carry on */
 128   bfd_arm_allocate_interworking_sections (& link_info);
 129
 130   before_allocation_default ();
 131 }
 132
 133 static void
 134 gld${EMULATION_NAME}_after_open (void)
 135 {
 136   after_open_default ();
 137
 138   if (strstr (bfd_get_target (link_info.output_bfd), "arm") == NULL)
 139     {
 140       /* The arm backend needs special fields in the output hash structure.
 141          These will only be created if the output format is an arm format,
 142          hence we do not support linking and changing output formats at the
 143          same time.  Use a link followed by objcopy to change output formats.  */
 144       einfo (_("%F%P: error: cannot change output format "
 145                "whilst linking %s binaries\n"), "ARM");
 146       return;
 147     }
 148
 149   {
 150     LANG_FOR_EACH_INPUT_STATEMENT (is)
 151       {
 152         if (bfd_arm_get_bfd_for_interworking (is->the_bfd, & link_info))
 153           break;
 154       }
 155   }
 156 }
 157
 158 static void
 159 gld${EMULATION_NAME}_finish (void)
 160 {
 161   if (thumb_entry_symbol != NULL)
 162     {
 163       struct bfd_link_hash_entry * h;
 164
 165       h = bfd_link_hash_lookup (link_info.hash, thumb_entry_symbol,
 166                                 FALSE, FALSE, TRUE);
 167
 168       if (h != (struct bfd_link_hash_entry *) NULL
 169           && (h->type == bfd_link_hash_defined
 170               || h->type == bfd_link_hash_defweak)
 171           && h->u.def.section->output_section != NULL)
 172         {
 173           static char buffer[32];
 174           bfd_vma val;
 175
 176           /* Special procesing is required for a Thumb entry symbol.  The
 177              bottom bit of its address must be set.  */
 178           val = (h->u.def.value
 179                  + bfd_get_section_vma (link_info.output_bfd,
 180                                         h->u.def.section->output_section)
 181                  + h->u.def.section->output_offset);
 182
 183           val |= 1;
 184
 185           /* Now convert this value into a string and store it in entry_symbol
 186              where the lang_finish() function will pick it up.  */
 187           buffer[0] = '0';
 188           buffer[1] = 'x';
 189
 190           sprintf_vma (buffer + 2, val);
 191
 192           if (entry_symbol.name != NULL && entry_from_cmdline)
 193             einfo (_("%P: warning: '--thumb-entry %s' is overriding '-e %s'\n"),
 194                    thumb_entry_symbol, entry_symbol.name);
 195           entry_symbol.name = buffer;
 196         }
 197       else
 198         einfo (_("%P: warning: cannot find thumb start symbol %s\n"),
 199                thumb_entry_symbol);
 200     }
 201
 202   finish_default ();
 203 }
 204
 205 static char *
 206 gld${EMULATION_NAME}_get_script (int *isfile)
 207 EOF
 208
 209 if test x"$COMPILE_IN" = xyes
 210 then
 211 # Scripts compiled in.
 212
 213 # sed commands to quote an ld script as a C string.
 214 sc="-f stringify.sed"
 215
 216 fragment <<EOF
 217 {
 218   *isfile = 0;
 219
 220   if (bfd_link_relocatable (&link_info) && config.build_constructors)
 221     return
 222 EOF
 223 sed $sc ldscripts/${EMULATION_NAME}.xu                 >> e${EMULATION_NAME}.c
 224 echo '  ; else if (bfd_link_relocatable (&link_info)) return' >> e${EMULATION_NAME}.c
 225 sed $sc ldscripts/${EMULATION_NAME}.xr                 >> e${EMULATION_NAME}.c
 226 echo '  ; else if (!config.text_read_only) return'     >> e${EMULATION_NAME}.c
 227 sed $sc ldscripts/${EMULATION_NAME}.xbn                >> e${EMULATION_NAME}.c
 228 echo '  ; else if (!config.magic_demand_paged) return' >> e${EMULATION_NAME}.c
 229 sed $sc ldscripts/${EMULATION_NAME}.xn                 >> e${EMULATION_NAME}.c
 230 echo '  ; else return'                                 >> e${EMULATION_NAME}.c
 231 sed $sc ldscripts/${EMULATION_NAME}.x                  >> e${EMULATION_NAME}.c
 232 echo '; }'                                             >> e${EMULATION_NAME}.c
 233
 234 else
 235 # Scripts read from the filesystem.
 236
 237 fragment <<EOF
 238 {
 239   *isfile = 1;
 240
 241   if (bfd_link_relocatable (&link_info) && config.build_constructors)
 242     return "ldscripts/${EMULATION_NAME}.xu";
 243   else if (bfd_link_relocatable (&link_info))
 244     return "ldscripts/${EMULATION_NAME}.xr";
 245   else if (!config.text_read_only)
 246     return "ldscripts/${EMULATION_NAME}.xbn";
 247   else if (!config.magic_demand_paged)
 248     return "ldscripts/${EMULATION_NAME}.xn";
 249   else
 250     return "ldscripts/${EMULATION_NAME}.x";
 251 }
 252 EOF
 253
 254 fi
 255
 256 fragment <<EOF
 257
 258 struct ld_emulation_xfer_struct ld_${EMULATION_NAME}_emulation =
 259 {
 260   gld${EMULATION_NAME}_before_parse,
 261   syslib_default,
 262   hll_default,
 263   after_parse_default,
 264   gld${EMULATION_NAME}_after_open,
 265   after_check_relocs_default,
 266   after_allocation_default,
 267   set_output_arch_default,
 268   ldemul_default_target,
 269   gld${EMULATION_NAME}_before_allocation,
 270   gld${EMULATION_NAME}_get_script,
 271   "${EMULATION_NAME}",
 272   "${OUTPUT_FORMAT}",
 273   gld${EMULATION_NAME}_finish,
 274   NULL, /* create output section statements */
 275   NULL, /* open dynamic archive */
 276   NULL, /* place orphan */
 277   NULL, /* set symbols */
 278   NULL, /* parse_args */
 279   gld${EMULATION_NAME}_add_options,
 280   gld${EMULATION_NAME}_handle_option,
 281   NULL, /* unrecognised file */
 282   gld${EMULATION_NAME}_list_options,
 283   NULL, /* recognized file */
 284   NULL, /* find_potential_libraries */
 285   NULL, /* new_vers_pattern */
 286   NULL  /* extra_map_file_text */
 287 };
 288 EOF