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 ${EMULATION_NAME}
   7    Copyright (C) 1991, 93, 96, 97, 98, 1999 Free Software Foundation, Inc.
   8    Written by Steve Chamberlain steve@cygnus.com
   9
  10 This file is part of GLD, the Gnu Linker.
  11
  12 This program is free software; you can redistribute it and/or modify
  13 it under the terms of the GNU General Public License as published by
  14 the Free Software Foundation; either version 2 of the License, or
  15 (at your option) any later version.
  16
  17 This program is distributed in the hope that it will be useful,
  18 but WITHOUT ANY WARRANTY; without even the implied warranty of
  19 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20 GNU General Public License for more details.
  21
  22 You should have received a copy of the GNU General Public License
  23 along with this program; if not, write to the Free Software
  24 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
  25
  26 #define TARGET_IS_${EMULATION_NAME}
  27
  28 #include "bfd.h"
  29 #include "sysdep.h"
  30 #include "bfdlink.h"
  31 #include "getopt.h"
  32
  33 #include "ld.h"
  34 #include "ldmain.h"
  35 #include "ldemul.h"
  36 #include "ldfile.h"
  37 #include "ldmisc.h"
  38
  39 #include "ldexp.h"
  40 #include "ldlang.h"
  41
  42 static void gld${EMULATION_NAME}_before_parse PARAMS ((void));
  43 static void gld${EMULATION_NAME}_before_allocation PARAMS ((void));
  44 static char *gld${EMULATION_NAME}_get_script PARAMS ((int *isfile));
  45 static int  gld${EMULATION_NAME}_parse_args PARAMS((int, char **));
  46 static void gld${EMULATION_NAME}_list_options PARAMS ((FILE *));
  47 static void gld${EMULATION_NAME}_finish PARAMS ((void));
  48
  49 /* If true, then interworking stubs which support calls to old, non-interworking
  50    aware ARM code should be generated.  */
  51
  52 static int support_old_code = 0;
  53 static char * thumb_entry_symbol = NULL;
  54
  55 #define OPTION_SUPPORT_OLD_CODE         300
  56 #define OPTION_THUMB_ENTRY              301
  57
  58 static struct option longopts[] =
  59 {
  60   {"support-old-code", no_argument, NULL, OPTION_SUPPORT_OLD_CODE},
  61   {"thumb-entry", required_argument, NULL, OPTION_THUMB_ENTRY},
  62   {NULL, no_argument, NULL, 0}
  63 };
  64
  65 static void
  66 gld${EMULATION_NAME}_list_options (file)
  67      FILE * file;
  68 {
  69   fprintf (file, _("  --support-old-code   Support interworking with old code\n"));
  70   fprintf (file, _("  --thumb-entry=<sym>  Set the entry point to be Thumb symbol <sym>\n"));
  71 }
  72
  73 static int
  74 gld${EMULATION_NAME}_parse_args (argc, argv)
  75      int     argc;
  76      char ** argv;
  77 {
  78   int        longind;
  79   int        optc;
  80   int        prevoptind = optind;
  81   int        prevopterr = opterr;
  82   int        wanterror;
  83   static int lastoptind = -1;
  84
  85   if (lastoptind != optind)
  86     opterr = 0;
  87
  88   wanterror  = opterr;
  89   lastoptind = optind;
  90
  91   optc   = getopt_long_only (argc, argv, "-", longopts, & longind);
  92   opterr = prevopterr;
  93
  94   switch (optc)
  95     {
  96     default:
  97       if (wanterror)
  98         xexit (1);
  99       optind =  prevoptind;
 100       return 0;
 101
 102     case OPTION_SUPPORT_OLD_CODE:
 103       support_old_code = 1;
 104       break;
 105
 106     case OPTION_THUMB_ENTRY:
 107       thumb_entry_symbol = optarg;
 108       break;
 109     }
 110
 111   return 1;
 112 }
 113 \f
 114 static void
 115 gld${EMULATION_NAME}_before_parse ()
 116 {
 117 #ifndef TARGET_                 /* I.e., if not generic.  */
 118   ldfile_set_output_arch ("`echo ${ARCH}`");
 119 #endif /* not TARGET_ */
 120 }
 121
 122 /* This is called after the sections have been attached to output
 123    sections, but before any sizes or addresses have been set.  */
 124
 125 static void
 126 gld${EMULATION_NAME}_before_allocation ()
 127 {
 128   /* we should be able to set the size of the interworking stub section */
 129
 130   /* Here we rummage through the found bfds to collect glue information */
 131   /* FIXME: should this be based on a command line option? krk@cygnus.com */
 132   {
 133     LANG_FOR_EACH_INPUT_STATEMENT (is)
 134       {
 135         if (! bfd_arm_process_before_allocation
 136             (is->the_bfd, & link_info, support_old_code))
 137           {
 138             /* xgettext:c-format */
 139             einfo (_("Errors encountered processing file %s"), is->filename);
 140           }
 141       }
 142   }
 143
 144   /* We have seen it all. Allocate it, and carry on */
 145   bfd_arm_allocate_interworking_sections (& link_info);
 146 }
 147
 148 static void
 149 gld${EMULATION_NAME}_after_open ()
 150 {
 151   if (strstr (bfd_get_target (output_bfd), "arm") == NULL)
 152     {
 153       /* The arm backend needs special fields in the output hash structure.
 154          These will only be created if the output format is an arm format,
 155          hence we do not support linking and changing output formats at the
 156          same time.  Use a link followed by objcopy to change output formats.  */
 157       einfo ("%F%X%P: error: cannot change output format whilst linking ARM binaries\n");
 158       return;
 159     }
 160
 161   {
 162     LANG_FOR_EACH_INPUT_STATEMENT (is)
 163       {
 164         if (bfd_arm_get_bfd_for_interworking (is->the_bfd, & link_info))
 165           break;
 166       }
 167   }
 168 }
 169
 170 static void
 171 gld${EMULATION_NAME}_finish PARAMS((void))
 172 {
 173   struct bfd_link_hash_entry * h;
 174
 175   if (thumb_entry_symbol == NULL)
 176     return;
 177
 178   h = bfd_link_hash_lookup (link_info.hash, thumb_entry_symbol, false, false, true);
 179
 180   if (h != (struct bfd_link_hash_entry *) NULL
 181       && (h->type == bfd_link_hash_defined
 182           || h->type == bfd_link_hash_defweak)
 183       && h->u.def.section->output_section != NULL)
 184     {
 185       static char buffer[32];
 186       bfd_vma val;
 187
 188       /* Special procesing is required for a Thumb entry symbol.  The
 189          bottom bit of its address must be set.  */
 190       val = (h->u.def.value
 191              + bfd_get_section_vma (output_bfd,
 192                                     h->u.def.section->output_section)
 193              + h->u.def.section->output_offset);
 194
 195       val |= 1;
 196
 197       /* Now convert this value into a string and store it in entry_symbol
 198          where the lang_finish() function will pick it up.  */
 199       buffer[0] = '0';
 200       buffer[1] = 'x';
 201
 202       sprintf_vma (buffer + 2, val);
 203
 204       if (entry_symbol != NULL && entry_from_cmdline)
 205         einfo (_("%P: warning: '--thumb-entry %s' is overriding '-e %s'\n"),
 206                thumb_entry_symbol, entry_symbol);
 207       entry_symbol = buffer;
 208     }
 209   else
 210     einfo (_("%P: warning: connot find thumb start symbol %s\n"), thumb_entry_symbol);
 211 }
 212
 213 static char *
 214 gld${EMULATION_NAME}_get_script (isfile)
 215      int *isfile;
 216 EOF
 217
 218 if test -n "$COMPILE_IN"
 219 then
 220 # Scripts compiled in.
 221
 222 # sed commands to quote an ld script as a C string.
 223 sc="-f stringify.sed"
 224
 225 cat >>e${EMULATION_NAME}.c <<EOF
 226 {
 227   *isfile = 0;
 228
 229   if (link_info.relocateable == true && config.build_constructors == true)
 230     return
 231 EOF
 232 sed $sc ldscripts/${EMULATION_NAME}.xu                     >> e${EMULATION_NAME}.c
 233 echo '  ; else if (link_info.relocateable == true) return' >> e${EMULATION_NAME}.c
 234 sed $sc ldscripts/${EMULATION_NAME}.xr                     >> e${EMULATION_NAME}.c
 235 echo '  ; else if (!config.text_read_only) return'         >> e${EMULATION_NAME}.c
 236 sed $sc ldscripts/${EMULATION_NAME}.xbn                    >> e${EMULATION_NAME}.c
 237 echo '  ; else if (!config.magic_demand_paged) return'     >> e${EMULATION_NAME}.c
 238 sed $sc ldscripts/${EMULATION_NAME}.xn                     >> e${EMULATION_NAME}.c
 239 echo '  ; else return'                                     >> e${EMULATION_NAME}.c
 240 sed $sc ldscripts/${EMULATION_NAME}.x                      >> e${EMULATION_NAME}.c
 241 echo '; }'                                                 >> e${EMULATION_NAME}.c
 242
 243 else
 244 # Scripts read from the filesystem.
 245
 246 cat >>e${EMULATION_NAME}.c <<EOF
 247 {
 248   *isfile = 1;
 249
 250   if (link_info.relocateable == true && config.build_constructors == true)
 251     return "ldscripts/${EMULATION_NAME}.xu";
 252   else if (link_info.relocateable == true)
 253     return "ldscripts/${EMULATION_NAME}.xr";
 254   else if (!config.text_read_only)
 255     return "ldscripts/${EMULATION_NAME}.xbn";
 256   else if (!config.magic_demand_paged)
 257     return "ldscripts/${EMULATION_NAME}.xn";
 258   else
 259     return "ldscripts/${EMULATION_NAME}.x";
 260 }
 261 EOF
 262
 263 fi
 264
 265 cat >>e${EMULATION_NAME}.c <<EOF
 266
 267 struct ld_emulation_xfer_struct ld_${EMULATION_NAME}_emulation =
 268 {
 269   gld${EMULATION_NAME}_before_parse,
 270   syslib_default,
 271   hll_default,
 272   after_parse_default,
 273   gld${EMULATION_NAME}_after_open,
 274   after_allocation_default,
 275   set_output_arch_default,
 276   ldemul_default_target,
 277   gld${EMULATION_NAME}_before_allocation,
 278   gld${EMULATION_NAME}_get_script,
 279   "${EMULATION_NAME}",
 280   "${OUTPUT_FORMAT}",
 281   gld${EMULATION_NAME}_finish,
 282   NULL, /* create output section statements */
 283   NULL, /* open dynamic archive */
 284   NULL, /* place orphan */
 285   NULL, /* set symbols */
 286   gld${EMULATION_NAME}_parse_args,
 287   NULL, /* unrecognised file */
 288   gld${EMULATION_NAME}_list_options,
 289   NULL  /* recognized file */
 290 };
 291 EOF