ld/emultempl/hppaelf.em

   1 # This shell script emits a C file. -*- C -*-
   2 # It does some substitutions.
   3 cat >em_${EMULATION_NAME}.c <<EOF
   4 /* An emulation for HP PA-RISC OSF/1 linkers.
   5    Copyright (C) 1991, 1993 Free Software Foundation, Inc.
   6    Written by Steve Chamberlain steve@cygnus.com
   7
   8 This file is part of GLD, the Gnu Linker.
   9
  10 This program is free software; you can redistribute it and/or modify
  11 it under the terms of the GNU General Public License as published by
  12 the Free Software Foundation; either version 2 of the License, or
  13 (at your option) any later version.
  14
  15 This program is distributed in the hope that it will be useful,
  16 but WITHOUT ANY WARRANTY; without even the implied warranty of
  17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18 GNU General Public License for more details.
  19
  20 You should have received a copy of the GNU General Public License
  21 along with this program; if not, write to the Free Software
  22 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.  */
  23
  24 #include "bfd.h"
  25 #include "sysdep.h"
  26 #include "bfdlink.h"
  27
  28 #include "ld.h"
  29 #include "config.h"
  30 #include "ldemul.h"
  31 #include "ldfile.h"
  32 #include "ldexp.h"
  33 #include "ldlang.h"
  34 #include "ldmisc.h"
  35 #include "ldmain.h"
  36 #include "ldctor.h"
  37
  38 static void hppaosf_before_parse()
  39 {
  40   link_info.lprefix = "L$";
  41   link_info.lprefix_len = 2;
  42
  43   ldfile_output_architecture = bfd_arch_hppa;
  44 }
  45
  46 static lang_input_statement_type *stub_file = 0;
  47
  48 static lang_input_section_type *stub_input_section = NULL;
  49
  50 static void
  51 hppaosf_search_for_padding_statements(s,prev)
  52         lang_statement_union_type *s;
  53         lang_statement_union_type **prev;
  54 {
  55   lang_statement_union_type *sprev = NULL;
  56   for (; s != (lang_statement_union_type *) NULL; s = s->next)
  57     {
  58       switch (s->header.type)
  59         {
  60         case lang_constructors_statement_enum:
  61           hppaosf_search_for_padding_statements (constructor_list.head,&constructor_list.head);
  62           break;
  63         case lang_output_section_statement_enum:
  64           hppaosf_search_for_padding_statements
  65             (s->output_section_statement.children.head,&s->output_section_statement.children.head);
  66           break;
  67         case lang_wild_statement_enum:
  68           hppaosf_search_for_padding_statements
  69             (s->wild_statement.children.head,&s->wild_statement.children.head);
  70           break;
  71         case lang_data_statement_enum:
  72         case lang_object_symbols_statement_enum:
  73         case lang_output_statement_enum:
  74         case lang_target_statement_enum:
  75         case lang_input_section_enum:
  76         case lang_input_statement_enum:
  77         case lang_assignment_statement_enum:
  78         case lang_address_statement_enum:
  79           break;
  80         case lang_padding_statement_enum:
  81           if ( sprev )
  82             {
  83               sprev->header.next = s->header.next;
  84             }
  85           else
  86             {
  87               **prev = *s;
  88             }
  89           break;
  90         default:
  91           FAIL ();
  92           break;
  93         }
  94       sprev = s;
  95     }
  96 }
  97
  98 static void
  99 hppaosf_finish()
 100 {
 101   extern asymbol *hppa_look_for_stubs_in_section();
 102
 103   if (link_info.relocateable == false)
 104     {
 105       /* check for needed stubs */
 106       extern lang_statement_list_type file_chain;
 107       lang_input_statement_type *statement;
 108
 109       for (statement = (lang_input_statement_type *)file_chain.head;
 110            statement != (lang_input_statement_type *)NULL;
 111            statement = (lang_input_statement_type *)statement->next)
 112         {
 113           asection *section;
 114           bfd *abfd = statement->the_bfd;
 115           for (section = abfd->sections;
 116                section != (asection *)NULL;
 117                section = section ->next)
 118             {
 119               int new_sym_cnt = 0;
 120               int i,j;
 121               asymbol *syms;
 122
 123               syms = hppa_look_for_stubs_in_section (stub_file->the_bfd,
 124                                                      abfd,
 125                                                      output_bfd,
 126                                                      section,
 127                                                      statement->asymbols,
 128                                                      &new_sym_cnt,
 129                                                      &link_info);
 130
 131               if ( (new_sym_cnt > 0) && syms )
 132                 {
 133                   struct symbol_cache_entry **old_asymbols;
 134
 135                   old_asymbols = stub_file->asymbols;
 136
 137                   stub_file->asymbols = xmalloc((stub_file->symbol_count + new_sym_cnt) * sizeof(asymbol *));
 138
 139                   for ( j = 0; j < stub_file->symbol_count; j++ )
 140                     stub_file->asymbols[j] = old_asymbols[j];
 141
 142                   for ( j = 0, i = stub_file->symbol_count; j < new_sym_cnt; j++, i++ )
 143                     stub_file->asymbols[i] = &syms[j];
 144
 145                   stub_file->symbol_count += new_sym_cnt;
 146                 }
 147             }
 148         }
 149       /* Add a statement to get the linker stubs included in the output */
 150       lang_add_wild(".hppa_linker_stubs",NULL);
 151
 152       /* If we've added stubs,remove the padding_statements because */
 153       /* they are no longer valid */
 154       hppaosf_search_for_padding_statements(stat_ptr->head,&(stat_ptr->head));
 155     }
 156 }
 157
 158 static void
 159 hppaosf_create_output_section_statements()
 160 {
 161   asection *stub_sec;
 162   asection *output_text_sec = bfd_make_section_old_way(output_bfd,".text");
 163   lang_input_section_type *new_input_sec;
 164
 165   stub_file = lang_add_input_file ("linker stubs",
 166                                    lang_input_file_is_fake_enum,
 167                                    (char *) NULL);
 168   stub_file->the_bfd = bfd_create ("linker stubs", output_bfd);
 169   stub_file->symbol_count = 0;
 170   stub_file->the_bfd->sections = 0;
 171
 172   stub_sec = bfd_make_section_old_way(stub_file->the_bfd,".hppa_linker_stubs");
 173   stub_sec->output_section = output_text_sec;
 174   bfd_set_section_flags(stub_file->the_bfd, stub_sec, SEC_HAS_CONTENTS | SEC_ALLOC | SEC_CODE | SEC_RELOC );
 175
 176   /* The user data of a bfd points to the input statement attached */
 177   stub_file->the_bfd->usrdata  = (void *)stub_file;
 178   stub_file->common_section =
 179     bfd_make_section(stub_file->the_bfd,"COMMON");
 180
 181   new_input_sec = (lang_input_section_type *)stat_alloc(sizeof(lang_input_section_type));
 182   if ( new_input_sec )
 183     {
 184         lang_output_section_statement_type *text_output_sec;
 185         lang_statement_union_type *stmt;
 186         lang_wild_statement_type *stub_statement;
 187         new_input_sec->section = stub_sec;
 188         new_input_sec->ifile = stub_file;
 189         new_input_sec->header.type = lang_input_section_enum;
 190         new_input_sec->header.next = NULL;
 191
 192         stub_input_section = new_input_sec;
 193
 194         /* Find the output_section_statement for .text, */
 195         /* then find the wild_statement for .hppa_linker_stubs */
 196
 197         text_output_sec = lang_output_section_find(".text");
 198
 199         stmt = text_output_sec->children.head;
 200
 201         while (stmt && stmt->header.type != lang_wild_statement_enum)
 202           {
 203                 stmt = stmt->header.next;
 204           }
 205
 206         if ( stmt )
 207           {
 208                 lang_wild_statement_type *wstmt = (lang_wild_statement_type *)stmt;
 209                 lang_list_init(&wstmt->children);
 210                 lang_statement_append(&wstmt->children,
 211                                       (lang_statement_union_type *)new_input_sec,
 212                                       &new_input_sec->header.next);
 213           }
 214     }
 215 }
 216
 217 static void
 218 hppaosf_set_output_arch()
 219 {
 220   /* Set the output architecture and machine if possible */
 221   unsigned long  machine = 0;
 222   bfd_set_arch_mach(output_bfd, ldfile_output_architecture, machine);
 223 }
 224
 225 static char *
 226 hppaosf_get_script(isfile)
 227      int *isfile;
 228 EOF
 229
 230 if test -n "$COMPILE_IN"
 231 then
 232 # Scripts compiled in.
 233
 234 # sed commands to quote an ld script as a C string.
 235 sc='s/["\\]/\\&/g
 236 s/$/\\n\\/
 237 1s/^/"{/
 238 $s/$/n}"/
 239 '
 240
 241 cat >>em_${EMULATION_NAME}.c <<EOF
 242 {
 243   *isfile = 0;
 244
 245   if (link_info.relocateable == true && config.build_constructors == true)
 246     return `sed "$sc" ldscripts/${EMULATION_NAME}.xu`;
 247   else if (link_info.relocateable == true)
 248     return `sed "$sc" ldscripts/${EMULATION_NAME}.xr`;
 249   else if (!config.text_read_only)
 250     return `sed "$sc" ldscripts/${EMULATION_NAME}.xbn`;
 251   else if (!config.magic_demand_paged)
 252     return `sed "$sc" ldscripts/${EMULATION_NAME}.xn`;
 253   else
 254     return `sed "$sc" ldscripts/${EMULATION_NAME}.x`;
 255 }
 256 EOF
 257
 258 else
 259 # Scripts read from the filesystem.
 260
 261 cat >>em_${EMULATION_NAME}.c <<EOF
 262 {
 263   *isfile = 1;
 264
 265   if (link_info.relocateable == true && config.build_constructors == true)
 266     return "ldscripts/${EMULATION_NAME}.xu";
 267   else if (link_info.relocateable == true)
 268     return "ldscripts/${EMULATION_NAME}.xr";
 269   else if (!config.text_read_only)
 270     return "ldscripts/${EMULATION_NAME}.xbn";
 271   else if (!config.magic_demand_paged)
 272     return "ldscripts/${EMULATION_NAME}.xn";
 273   else
 274     return "ldscripts/${EMULATION_NAME}.x";
 275 }
 276 EOF
 277
 278 fi
 279
 280 cat >>em_${EMULATION_NAME}.c <<EOF
 281
 282 struct ld_emulation_xfer_struct ld_hppaosf_emulation =
 283 {
 284   hppaosf_before_parse,
 285   syslib_default,
 286   hll_default,
 287   after_parse_default,
 288   after_allocation_default,
 289   hppaosf_set_output_arch,
 290   ldemul_default_target,
 291   before_allocation_default,
 292   hppaosf_get_script,
 293   "hppaosf",
 294   "elf32-hppa",
 295   hppaosf_finish,
 296   hppaosf_create_output_section_statements
 297 };
 298 EOF