ld/mpw-idtmips.c

   1 /* This file is is generated by a shell script.  DO NOT EDIT! */
   2
   3 /* Handle embedded relocs for MIPS.
   4    Copyright 1994, 1997, 2000 Free Software Foundation, Inc.
   5    Written by Ian Lance Taylor <ian@cygnus.com> based on generic.em.
   6
   7 This file is part of GLD, the Gnu Linker.
   8
   9 This program is free software; you can redistribute it and/or modify
  10 it under the terms of the GNU General Public License as published by
  11 the Free Software Foundation; either version 2 of the License, or
  12 (at your option) any later version.
  13
  14 This program is distributed in the hope that it will be useful,
  15 but WITHOUT ANY WARRANTY; without even the implied warranty of
  16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17 GNU General Public License for more details.
  18
  19 You should have received a copy of the GNU General Public License
  20 along with this program; if not, write to the Free Software
  21 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
  22
  23 #define TARGET_IS_mipsidt
  24
  25 #include "libiberty.h"
  26 #include "bfd.h"
  27 #include "sysdep.h"
  28 #include "bfdlink.h"
  29
  30 #include "ld.h"
  31 #include "ldmain.h"
  32 #include "ldmisc.h"
  33
  34 #include "ldexp.h"
  35 #include "ldlang.h"
  36 #include "ldfile.h"
  37 #include "ldemul.h"
  38
  39 static void gldmipsidt_before_parse PARAMS ((void));
  40 static void gldmipsidt_after_open PARAMS ((void));
  41 static void check_sections PARAMS ((bfd *, asection *, PTR));
  42 static void gldmipsidt_after_allocation PARAMS ((void));
  43 static char *gldmipsidt_get_script PARAMS ((int *isfile));
  44
  45 static void
  46 gldmipsidt_before_parse()
  47 {
  48 #ifndef TARGET_                 /* I.e., if not generic.  */
  49   ldfile_output_architecture = bfd_arch_mips;
  50 #endif /* not TARGET_ */
  51 }
  52
  53 /* This function is run after all the input files have been opened.
  54    We create a .rel.sdata section for each input file with a non zero
  55    .sdata section.  The BFD backend will fill in these sections with
  56    magic numbers which can be used to relocate the data section at run
  57    time.  This will only do the right thing if all the input files
  58    have been compiled using -membedded-pic.  */
  59
  60 static void
  61 gldmipsidt_after_open ()
  62 {
  63   bfd *abfd;
  64
  65   if (! command_line.embedded_relocs
  66       || link_info.relocateable)
  67     return;
  68
  69   for (abfd = link_info.input_bfds; abfd != NULL; abfd = abfd->link_next)
  70     {
  71       asection *datasec;
  72
  73       datasec = bfd_get_section_by_name (abfd, ".sdata");
  74
  75       /* Note that we assume that the reloc_count field has already
  76          been set up.  We could call bfd_get_reloc_upper_bound, but
  77          that returns the size of a memory buffer rather than a reloc
  78          count.  We do not want to call bfd_canonicalize_reloc,
  79          because although it would always work it would force us to
  80          read in the relocs into BFD canonical form, which would waste
  81          a significant amount of time and memory.  */
  82       if (datasec != NULL && datasec->reloc_count > 0)
  83         {
  84           asection *relsec;
  85
  86           relsec = bfd_make_section (abfd, ".rel.sdata");
  87           if (relsec == NULL
  88               || ! bfd_set_section_flags (abfd, relsec,
  89                                           (SEC_ALLOC
  90                                            | SEC_LOAD
  91                                            | SEC_HAS_CONTENTS
  92                                            | SEC_IN_MEMORY))
  93               || ! bfd_set_section_alignment (abfd, relsec, 2)
  94               || ! bfd_set_section_size (abfd, relsec,
  95                                          datasec->reloc_count * 4))
  96             einfo (_("%F%B: can not create .rel.sdata section: %E\n"));
  97         }
  98
  99       /* Double check that all other data sections are empty, as is
 100          required for embedded PIC code.  */
 101       bfd_map_over_sections (abfd, check_sections, (PTR) datasec);
 102     }
 103 }
 104
 105 /* Check that of the data sections, only the .sdata section has
 106    relocs.  This is called via bfd_map_over_sections.  */
 107
 108 static void
 109 check_sections (abfd, sec, sdatasec)
 110      bfd *abfd;
 111      asection *sec;
 112      PTR sdatasec;
 113 {
 114   if ((bfd_get_section_flags (abfd, sec) & SEC_CODE) == 0
 115       && sec != (asection *) sdatasec
 116       && sec->reloc_count != 0)
 117     einfo (_("%F%X: section %s has relocs; can not use --embedded-relocs\n"),
 118            abfd, bfd_get_section_name (abfd, sec));
 119 }
 120
 121 /* This function is called after the section sizes and offsets have
 122    been set.  If we are generating embedded relocs, it calls a special
 123    BFD backend routine to do the work.  */
 124
 125 static void
 126 gldmipsidt_after_allocation ()
 127 {
 128   bfd *abfd;
 129
 130   if (! command_line.embedded_relocs
 131       || link_info.relocateable)
 132     return;
 133
 134   for (abfd = link_info.input_bfds; abfd != NULL; abfd = abfd->link_next)
 135     {
 136       asection *datasec, *relsec;
 137       char *errmsg;
 138
 139       datasec = bfd_get_section_by_name (abfd, ".sdata");
 140
 141       if (datasec == NULL || datasec->reloc_count == 0)
 142         continue;
 143
 144       relsec = bfd_get_section_by_name (abfd, ".rel.sdata");
 145       ASSERT (relsec != NULL);
 146
 147       if (! bfd_mips_ecoff_create_embedded_relocs (abfd, &link_info,
 148                                                    datasec, relsec,
 149                                                    &errmsg))
 150         {
 151           if (errmsg == NULL)
 152             einfo (_("%B%X: can not create runtime reloc information: %E\n"),
 153                    abfd);
 154           else
 155             einfo (_("%X%B: can not create runtime reloc information: %s\n"),
 156                    abfd, errmsg);
 157         }
 158     }
 159 }
 160
 161 static char *
 162 gldmipsidt_get_script(isfile)
 163      int *isfile;
 164 {
 165   *isfile = 0;
 166
 167   if (link_info.relocateable == true && config.build_constructors == true)
 168     return
 169 concat(
 170 "OUTPUT_FORMAT(\"ecoff-bigmips\", \"ecoff-bigmips\",\n\
 171               \"ecoff-littlemips\")\n\
 172  SEARCH_DIR(/usr/local/mips-idt-ecoff/lib);\n\
 173 ENTRY(start)\n\
 174 SECTIONS\n\
 175 {\n\
 176   .text : {\n\
 177     ;\n\
 178     *(.init)\n\
 179     ;\n\
 180     *(.text)\n\
 181     *(.rel.sdata)\n\
 182     *(.fini)\n\
 183     ;\n\
 184     ;\n\
 185   }\n\
 186  ","  .rdata : {\n\
 187     *(.rdata)\n\
 188   }\n\
 189   .data : {\n\
 190     *(.data)\n\
 191     CONSTRUCTORS\n\
 192   }\n\
 193   .lit8 : {\n\
 194     *(.lit8)\n\
 195   }\n\
 196   .lit4 : {\n\
 197     *(.lit4)\n\
 198   }\n\
 199  ","  .sdata : {\n\
 200     *(.sdata)\n\
 201   }\n\
 202   .sbss : {\n\
 203     *(.sbss)\n\
 204     *(.scommon)\n\
 205   }\n\
 206   .bss : {\n\
 207     *(.bss)\n\
 208     *(COMMON)\n\
 209   }\n\
 210 }\n\n", NULL)
 211   ; else if (link_info.relocateable == true) return
 212 "OUTPUT_FORMAT(\"ecoff-bigmips\", \"ecoff-bigmips\",\n\
 213               \"ecoff-littlemips\")\n\
 214  SEARCH_DIR(/usr/local/mips-idt-ecoff/lib);\n\
 215 ENTRY(start)\n\
 216 SECTIONS\n\
 217 {\n\
 218   .text : {\n\
 219     ;\n\
 220     *(.init)\n\
 221     ;\n\
 222     *(.text)\n\
 223     *(.rel.sdata)\n\
 224     *(.fini)\n\
 225     ;\n\
 226     ;\n\
 227   }\n\
 228   .rdata : {\n\
 229     *(.rdata)\n\
 230   }\n\
 231   .data : {\n\
 232     *(.data)\n\
 233   }\n\
 234   .lit8 : {\n\
 235     *(.lit8)\n\
 236   }\n\
 237   .lit4 : {\n\
 238     *(.lit4)\n\
 239   }\n\
 240   .sdata : {\n\
 241     *(.sdata)\n\
 242   }\n\
 243   .sbss : {\n\
 244     *(.sbss)\n\
 245     *(.scommon)\n\
 246   }\n\
 247   .bss : {\n\
 248     *(.bss)\n\
 249     *(COMMON)\n\
 250   }\n\
 251 }\n\n"
 252   ; else if (!config.text_read_only) return
 253 concat(
 254 "OUTPUT_FORMAT(\"ecoff-bigmips\", \"ecoff-bigmips\",\n\
 255               \"ecoff-littlemips\")\n\
 256  SEARCH_DIR(/usr/local/mips-idt-ecoff/lib);\n\
 257 ENTRY(start)\n\
 258 SECTIONS\n\
 259 {\n\
 260   . = 0xa0012000;\n\
 261   .text : {\n\
 262      _ftext = . ;\n\
 263     *(.init)\n\
 264      eprol  =  .;\n\
 265     *(.text)\n\
 266     PROVIDE (__runtime_reloc_start = .);\n\
 267     *(.rel.sdata)\n\
 268     PROVIDE (__runtime_reloc_stop = .);\n\
 269     *(.fini)\n\
 270      etext  =  .;\n\
 271      _etext  =  .;\n\
 272 ","  }\n\
 273   . = .;\n\
 274   .rdata : {\n\
 275     *(.rdata)\n\
 276   }\n\
 277    _fdata = ALIGN(16);\n\
 278   .data : {\n\
 279     *(.data)\n\
 280     CONSTRUCTORS\n\
 281   }\n\
 282    _gp = ALIGN(16) + 0x8000;\n\
 283   .lit8 : {\n\
 284     *(.lit8)\n\
 285   }\n\
 286   .lit4 : {\n\
 287     *(.lit4)\n\
 288   }\n\
 289   .sdata : {\n\
 290     *(.sdata)\n\
 291   }\n\
 292 ","   edata  =  .;\n\
 293    _edata  =  .;\n\
 294    _fbss = .;\n\
 295   .sbss : {\n\
 296     *(.sbss)\n\
 297     *(.scommon)\n\
 298   }\n\
 299   .bss : {\n\
 300     *(.bss)\n\
 301     *(COMMON)\n\
 302   }\n\
 303    end = .;\n\
 304    _end = .;\n\
 305 }\n\n"
 306 , NULL)
 307   ; else if (!config.magic_demand_paged) return
 308 concat (
 309 "OUTPUT_FORMAT(\"ecoff-bigmips\", \"ecoff-bigmips\",\n\
 310               \"ecoff-littlemips\")\n\
 311  SEARCH_DIR(/usr/local/mips-idt-ecoff/lib);\n\
 312 ENTRY(start)\n\
 313 SECTIONS\n\
 314 {\n\
 315   . = 0xa0012000;\n\
 316   .text : {\n\
 317      _ftext = . ;\n\
 318     *(.init)\n\
 319      eprol  =  .;\n\
 320     *(.text)\n\
 321     PROVIDE (__runtime_reloc_start = .);\n\
 322     *(.rel.sdata)\n\
 323     PROVIDE (__runtime_reloc_stop = .);\n\
 324     *(.fini)\n\
 325      etext  =  .;\n\
 326      _etext  =  .;\n\
 327  ","  }\n\
 328   . = .;\n\
 329   .rdata : {\n\
 330     *(.rdata)\n\
 331   }\n\
 332    _fdata = ALIGN(16);\n\
 333   .data : {\n\
 334     *(.data)\n\
 335     CONSTRUCTORS\n\
 336   }\n\
 337    _gp = ALIGN(16) + 0x8000;\n\
 338   .lit8 : {\n\
 339     *(.lit8)\n\
 340  ","  }\n\
 341   .lit4 : {\n\
 342     *(.lit4)\n\
 343   }\n\
 344   .sdata : {\n\
 345     *(.sdata)\n\
 346   }\n\
 347    edata  =  .;\n\
 348    _edata  =  .;\n\
 349    _fbss = .;\n\
 350   .sbss : {\n\
 351     *(.sbss)\n\
 352     *(.scommon)\n\
 353  ","  }\n\
 354   .bss : {\n\
 355     *(.bss)\n\
 356     *(COMMON)\n\
 357   }\n\
 358    end = .;\n\
 359    _end = .;\n\
 360 }\n\n"
 361 , NULL)
 362   ; else return
 363 concat (
 364 "OUTPUT_FORMAT(\"ecoff-bigmips\", \"ecoff-bigmips\",\n\
 365               \"ecoff-littlemips\")\n\
 366  SEARCH_DIR(/usr/local/mips-idt-ecoff/lib);\n\
 367 ENTRY(start)\n\
 368 SECTIONS\n\
 369 {\n\
 370   . = 0xa0012000;\n\
 371   .text : {\n\
 372      _ftext = . ;\n\
 373     *(.init)\n\
 374      eprol  =  .;\n\
 375     *(.text)\n\
 376     PROVIDE (__runtime_reloc_start = .);\n\
 377     *(.rel.sdata)\n\
 378     PROVIDE (__runtime_reloc_stop = .);\n\
 379     *(.fini)\n\
 380      etext  =  .;\n\
 381      _etext  =  .;\n\
 382  ","  }\n\
 383   . = .;\n\
 384   .rdata : {\n\
 385     *(.rdata)\n\
 386   }\n\
 387    _fdata = ALIGN(16);\n\
 388   .data : {\n\
 389     *(.data)\n\
 390     CONSTRUCTORS\n\
 391   }\n\
 392    _gp = ALIGN(16) + 0x8000;\n\
 393   .lit8 : {\n\
 394     *(.lit8)\n\
 395   }\n\
 396   .lit4 : {\n\
 397     *(.lit4)\n\
 398  ","  }\n\
 399   .sdata : {\n\
 400     *(.sdata)\n\
 401   }\n\
 402    edata  =  .;\n\
 403    _edata  =  .;\n\
 404    _fbss = .;\n\
 405   .sbss : {\n\
 406     *(.sbss)\n\
 407     *(.scommon)\n\
 408   }\n\
 409   .bss : {\n\
 410     *(.bss)\n\
 411     *(COMMON)\n\
 412   }\n\
 413    end = .;\n\
 414    _end = .;\n\
 415 }\n\n"
 416 , NULL)
 417 ; }
 418
 419 struct ld_emulation_xfer_struct ld_mipsidt_emulation =
 420 {
 421   gldmipsidt_before_parse,
 422   syslib_default,
 423   hll_default,
 424   after_parse_default,
 425   gldmipsidt_after_open,
 426   gldmipsidt_after_allocation,
 427   set_output_arch_default,
 428   ldemul_default_target,
 429   before_allocation_default,
 430   gldmipsidt_get_script,
 431   "mipsidt",
 432   "ecoff-bigmips"
 433 };