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