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