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 ${EMULATION_NAME}
   7    Copyright 1991, 1993, 1996, 1997, 1998, 1999, 2000, 2001, 2002
   8    Free Software Foundation, Inc.
   9    Written by Steve Chamberlain steve@cygnus.com
  10
  11 This file is part of GLD, the Gnu Linker.
  12
  13 This program is free software; you can redistribute it and/or modify
  14 it under the terms of the GNU General Public License as published by
  15 the Free Software Foundation; either version 2 of the License, or
  16 (at your option) any later version.
  17
  18 This program is distributed in the hope that it will be useful,
  19 but WITHOUT ANY WARRANTY; without even the implied warranty of
  20 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  21 GNU General Public License for more details.
  22
  23 You should have received a copy of the GNU General Public License
  24 along with this program; if not, write to the Free Software
  25 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
  26
  27 #define TARGET_IS_${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 static void gld${EMULATION_NAME}_before_parse PARAMS ((void));
  44 static void gld${EMULATION_NAME}_before_allocation PARAMS ((void));
  45 static char *gld${EMULATION_NAME}_get_script PARAMS ((int *isfile));
  46 static int  gld${EMULATION_NAME}_parse_args PARAMS((int, char **));
  47 static void gld${EMULATION_NAME}_list_options PARAMS ((FILE *));
  48 static void gld${EMULATION_NAME}_finish PARAMS ((void));
  49 static void gld${EMULATION_NAME}_after_open PARAMS ((void));
  50
  51 /* If TRUE, then interworking stubs which support calls to old, non-interworking
  52    aware ARM code should be generated.  */
  53
  54 static int support_old_code = 0;
  55 static char * thumb_entry_symbol = NULL;
  56
  57 #define OPTION_SUPPORT_OLD_CODE         300
  58 #define OPTION_THUMB_ENTRY              301
  59
  60 static struct option longopts[] =
  61 {
  62   {"support-old-code", no_argument, NULL, OPTION_SUPPORT_OLD_CODE},
  63   {"thumb-entry", required_argument, NULL, OPTION_THUMB_ENTRY},
  64   {NULL, no_argument, NULL, 0}
  65 };
  66
  67 static void
  68 gld${EMULATION_NAME}_list_options (file)
  69      FILE * file;
  70 {
  71   fprintf (file, _("  --support-old-code   Support interworking with old code\n"));
  72   fprintf (file, _("  --thumb-entry=<sym>  Set the entry point to be Thumb symbol <sym>\n"));
  73 }
  74
  75 static int
  76 gld${EMULATION_NAME}_parse_args (argc, argv)
  77      int     argc;
  78      char ** argv;
  79 {
  80   int        longind;
  81   int        optc;
  82   int        prevoptind = optind;
  83   int        prevopterr = opterr;
  84   int        wanterror;
  85   static int lastoptind = -1;
  86
  87   if (lastoptind != optind)
  88     opterr = 0;
  89
  90   wanterror  = opterr;
  91   lastoptind = optind;
  92
  93   optc   = getopt_long_only (argc, argv, "-", longopts, & longind);
  94   opterr = prevopterr;
  95
  96   switch (optc)
  97     {
  98     default:
  99       if (wanterror)
 100         xexit (1);
 101       optind =  prevoptind;
 102       return 0;
 103
 104     case OPTION_SUPPORT_OLD_CODE:
 105       support_old_code = 1;
 106       break;
 107
 108     case OPTION_THUMB_ENTRY:
 109       thumb_entry_symbol = optarg;
 110       break;
 111     }
 112
 113   return 1;
 114 }
 115 \f
 116 static void
 117 gld${EMULATION_NAME}_before_parse ()
 118 {
 119 #ifndef TARGET_                 /* I.e., if not generic.  */
 120   ldfile_set_output_arch ("`echo ${ARCH}`");
 121 #endif /* not TARGET_ */
 122 }
 123
 124 /* This is called after the sections have been attached to output
 125    sections, but before any sizes or addresses have been set.  */
 126
 127 static void
 128 gld${EMULATION_NAME}_before_allocation ()
 129 {
 130   /* we should be able to set the size of the interworking stub section */
 131
 132   /* Here we rummage through the found bfds to collect glue information */
 133   /* FIXME: should this be based on a command line option? krk@cygnus.com */
 134   {
 135     LANG_FOR_EACH_INPUT_STATEMENT (is)
 136       {
 137         if (! bfd_arm_process_before_allocation
 138             (is->the_bfd, & link_info, support_old_code))
 139           {
 140             /* xgettext:c-format */
 141             einfo (_("Errors encountered processing file %s"), is->filename);
 142           }
 143       }
 144   }
 145
 146   /* We have seen it all. Allocate it, and carry on */
 147   bfd_arm_allocate_interworking_sections (& link_info);
 148 }
 149
 150 static void
 151 gld${EMULATION_NAME}_after_open ()
 152 {
 153   if (strstr (bfd_get_target (output_bfd), "arm") == NULL)
 154     {
 155       /* The arm backend needs special fields in the output hash structure.
 156          These will only be created if the output format is an arm format,
 157          hence we do not support linking and changing output formats at the
 158          same time.  Use a link followed by objcopy to change output formats.  */
 159       einfo ("%F%X%P: error: cannot change output format whilst linking ARM binaries\n");
 160       return;
 161     }
 162
 163   {
 164     LANG_FOR_EACH_INPUT_STATEMENT (is)
 165       {
 166         if (bfd_arm_get_bfd_for_interworking (is->the_bfd, & link_info))
 167           break;
 168       }
 169   }
 170 }
 171
 172 static void
 173 gld${EMULATION_NAME}_finish PARAMS((void))
 174 {
 175   struct bfd_link_hash_entry * h;
 176
 177   if (thumb_entry_symbol == NULL)
 178     return;
 179
 180   h = bfd_link_hash_lookup (link_info.hash, thumb_entry_symbol,
 181                             FALSE, FALSE, TRUE);
 182
 183   if (h != (struct bfd_link_hash_entry *) NULL
 184       && (h->type == bfd_link_hash_defined
 185           || h->type == bfd_link_hash_defweak)
 186       && h->u.def.section->output_section != NULL)
 187     {
 188       static char buffer[32];
 189       bfd_vma val;
 190
 191       /* Special procesing is required for a Thumb entry symbol.  The
 192          bottom bit of its address must be set.  */
 193       val = (h->u.def.value
 194              + bfd_get_section_vma (output_bfd,
 195                                     h->u.def.section->output_section)
 196              + h->u.def.section->output_offset);
 197
 198       val |= 1;
 199
 200       /* Now convert this value into a string and store it in entry_symbol
 201          where the lang_finish() function will pick it up.  */
 202       buffer[0] = '0';
 203       buffer[1] = 'x';
 204
 205       sprintf_vma (buffer + 2, val);
 206
 207       if (entry_symbol.name != NULL && entry_from_cmdline)
 208         einfo (_("%P: warning: '--thumb-entry %s' is overriding '-e %s'\n"),
 209                thumb_entry_symbol, entry_symbol.name);
 210       entry_symbol.name = buffer;
 211     }
 212   else
 213     einfo (_("%P: warning: connot find thumb start symbol %s\n"), thumb_entry_symbol);
 214 }
 215
 216 static char *
 217 gld${EMULATION_NAME}_get_script (isfile)
 218      int *isfile;
 219 EOF
 220
 221 if test -n "$COMPILE_IN"
 222 then
 223 # Scripts compiled in.
 224
 225 # sed commands to quote an ld script as a C string.
 226 sc="-f stringify.sed"
 227
 228 cat >>e${EMULATION_NAME}.c <<EOF
 229 {
 230   *isfile = 0;
 231
 232   if (link_info.relocateable && config.build_constructors)
 233     return
 234 EOF
 235 sed $sc ldscripts/${EMULATION_NAME}.xu                 >> e${EMULATION_NAME}.c
 236 echo '  ; else if (link_info.relocateable) return'     >> e${EMULATION_NAME}.c
 237 sed $sc ldscripts/${EMULATION_NAME}.xr                 >> e${EMULATION_NAME}.c
 238 echo '  ; else if (!config.text_read_only) return'     >> e${EMULATION_NAME}.c
 239 sed $sc ldscripts/${EMULATION_NAME}.xbn                >> e${EMULATION_NAME}.c
 240 echo '  ; else if (!config.magic_demand_paged) return' >> e${EMULATION_NAME}.c
 241 sed $sc ldscripts/${EMULATION_NAME}.xn                 >> e${EMULATION_NAME}.c
 242 echo '  ; else return'                                 >> e${EMULATION_NAME}.c
 243 sed $sc ldscripts/${EMULATION_NAME}.x                  >> e${EMULATION_NAME}.c
 244 echo '; }'                                             >> e${EMULATION_NAME}.c
 245
 246 else
 247 # Scripts read from the filesystem.
 248
 249 cat >>e${EMULATION_NAME}.c <<EOF
 250 {
 251   *isfile = 1;
 252
 253   if (link_info.relocateable && config.build_constructors)
 254     return "ldscripts/${EMULATION_NAME}.xu";
 255   else if (link_info.relocateable)
 256     return "ldscripts/${EMULATION_NAME}.xr";
 257   else if (!config.text_read_only)
 258     return "ldscripts/${EMULATION_NAME}.xbn";
 259   else if (!config.magic_demand_paged)
 260     return "ldscripts/${EMULATION_NAME}.xn";
 261   else
 262     return "ldscripts/${EMULATION_NAME}.x";
 263 }
 264 EOF
 265
 266 fi
 267
 268 cat >>e${EMULATION_NAME}.c <<EOF
 269
 270 struct ld_emulation_xfer_struct ld_${EMULATION_NAME}_emulation =
 271 {
 272   gld${EMULATION_NAME}_before_parse,
 273   syslib_default,
 274   hll_default,
 275   after_parse_default,
 276   gld${EMULATION_NAME}_after_open,
 277   after_allocation_default,
 278   set_output_arch_default,
 279   ldemul_default_target,
 280   gld${EMULATION_NAME}_before_allocation,
 281   gld${EMULATION_NAME}_get_script,
 282   "${EMULATION_NAME}",
 283   "${OUTPUT_FORMAT}",
 284   gld${EMULATION_NAME}_finish,
 285   NULL, /* create output section statements */
 286   NULL, /* open dynamic archive */
 287   NULL, /* place orphan */
 288   NULL, /* set symbols */
 289   gld${EMULATION_NAME}_parse_args,
 290   NULL, /* unrecognised file */
 291   gld${EMULATION_NAME}_list_options,
 292   NULL, /* recognized file */
 293   NULL, /* find_potential_libraries */
 294   NULL  /* new_vers_pattern */
 295 };
 296 EOF