1# This shell script emits a C file. -*- C -*- 2# It does some substitutions. 3if [ -z "$MACHINE" ]; then 4 OUTPUT_ARCH=${ARCH} 5else 6 OUTPUT_ARCH=${ARCH}:${MACHINE} 7fi 8cat >e${EMULATION_NAME}.c <<EOF 9/* This file is part of GLD, the Gnu Linker. 10 Copyright 1995, 1996, 1997, 1998, 2000, 2001, 2002, 2003, 2004 11 Free Software Foundation, Inc. 12 13This program is free software; you can redistribute it and/or modify 14it under the terms of the GNU General Public License as published by 15the Free Software Foundation; either version 2 of the License, or 16(at your option) any later version. 17 18This program is distributed in the hope that it will be useful, 19but WITHOUT ANY WARRANTY; without even the implied warranty of 20MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 21GNU General Public License for more details. 22 23You should have received a copy of the GNU General Public License 24along with this program; if not, write to the Free Software 25Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ 26 27/* For WINDOWS_NT */ 28/* The original file generated returned different default scripts depending 29 on whether certain switches were set, but these switches pertain to the 30 Linux system and that particular version of coff. In the NT case, we 31 only determine if the subsystem is console or windows in order to select 32 the correct entry point by default. */ 33 34#include "bfd.h" 35#include "sysdep.h" 36#include "bfdlink.h" 37#include "getopt.h" 38#include "libiberty.h" 39#include "ld.h" 40#include "ldmain.h" 41#include "ldexp.h" 42#include "ldlang.h" 43#include "ldfile.h" 44#include "ldemul.h" 45#include <ldgram.h> 46#include "ldlex.h" 47#include "ldmisc.h" 48#include "ldctor.h" 49#include "coff/internal.h" 50#include "../bfd/libcoff.h" 51 52#define TARGET_IS_${EMULATION_NAME} 53 54static struct internal_extra_pe_aouthdr pe; 55static int dll; 56 57extern const char *output_filename; 58 59static void 60gld_${EMULATION_NAME}_before_parse (void) 61{ 62 ldfile_set_output_arch ("${OUTPUT_ARCH}", bfd_arch_`echo ${ARCH} | sed -e 's/:.*//'`); 63 output_filename = "a.exe"; 64} 65 66/* PE format extra command line options. */ 67 68/* Used for setting flags in the PE header. */ 69#define OPTION_BASE_FILE (300 + 1) 70#define OPTION_DLL (OPTION_BASE_FILE + 1) 71#define OPTION_FILE_ALIGNMENT (OPTION_DLL + 1) 72#define OPTION_IMAGE_BASE (OPTION_FILE_ALIGNMENT + 1) 73#define OPTION_MAJOR_IMAGE_VERSION (OPTION_IMAGE_BASE + 1) 74#define OPTION_MAJOR_OS_VERSION (OPTION_MAJOR_IMAGE_VERSION + 1) 75#define OPTION_MAJOR_SUBSYSTEM_VERSION (OPTION_MAJOR_OS_VERSION + 1) 76#define OPTION_MINOR_IMAGE_VERSION (OPTION_MAJOR_SUBSYSTEM_VERSION + 1) 77#define OPTION_MINOR_OS_VERSION (OPTION_MINOR_IMAGE_VERSION + 1) 78#define OPTION_MINOR_SUBSYSTEM_VERSION (OPTION_MINOR_OS_VERSION + 1) 79#define OPTION_SECTION_ALIGNMENT (OPTION_MINOR_SUBSYSTEM_VERSION + 1) 80#define OPTION_STACK (OPTION_SECTION_ALIGNMENT + 1) 81#define OPTION_SUBSYSTEM (OPTION_STACK + 1) 82#define OPTION_HEAP (OPTION_SUBSYSTEM + 1) 83 84static void 85gld${EMULATION_NAME}_add_options 86 (int ns ATTRIBUTE_UNUSED, char **shortopts ATTRIBUTE_UNUSED, int nl, 87 struct option **longopts, int nrl ATTRIBUTE_UNUSED, 88 struct option **really_longopts ATTRIBUTE_UNUSED) 89{ 90 static const struct option xtra_long[] = { 91 /* PE options */ 92 {"base-file", required_argument, NULL, OPTION_BASE_FILE}, 93 {"dll", no_argument, NULL, OPTION_DLL}, 94 {"file-alignment", required_argument, NULL, OPTION_FILE_ALIGNMENT}, 95 {"heap", required_argument, NULL, OPTION_HEAP}, 96 {"image-base", required_argument, NULL, OPTION_IMAGE_BASE}, 97 {"major-image-version", required_argument, NULL, OPTION_MAJOR_IMAGE_VERSION}, 98 {"major-os-version", required_argument, NULL, OPTION_MAJOR_OS_VERSION}, 99 {"major-subsystem-version", required_argument, NULL, OPTION_MAJOR_SUBSYSTEM_VERSION}, 100 {"minor-image-version", required_argument, NULL, OPTION_MINOR_IMAGE_VERSION}, 101 {"minor-os-version", required_argument, NULL, OPTION_MINOR_OS_VERSION}, 102 {"minor-subsystem-version", required_argument, NULL, OPTION_MINOR_SUBSYSTEM_VERSION}, 103 {"section-alignment", required_argument, NULL, OPTION_SECTION_ALIGNMENT}, 104 {"stack", required_argument, NULL, OPTION_STACK}, 105 {"subsystem", required_argument, NULL, OPTION_SUBSYSTEM}, 106 {NULL, no_argument, NULL, 0} 107 }; 108 109 *longopts = (struct option *) 110 xrealloc (*longopts, nl * sizeof (struct option) + sizeof (xtra_long)); 111 memcpy (*longopts + nl, &xtra_long, sizeof (xtra_long)); 112} 113 114 115/* PE/WIN32; added routines to get the subsystem type, heap and/or stack 116 parameters which may be input from the command line */ 117 118typedef struct { 119 void *ptr; 120 int size; 121 int value; 122 char *symbol; 123 int inited; 124} definfo; 125 126#define D(field,symbol,def) {&pe.field,sizeof(pe.field), def, symbol,0} 127 128static definfo init[] = 129{ 130 /* imagebase must be first */ 131#define IMAGEBASEOFF 0 132 D(ImageBase,"__image_base__", BEOS_EXE_IMAGE_BASE), 133#define DLLOFF 1 134 {&dll, sizeof(dll), 0, "__dll__", 0}, 135 D(SectionAlignment,"__section_alignment__", PE_DEF_SECTION_ALIGNMENT), 136 D(FileAlignment,"__file_alignment__", PE_DEF_FILE_ALIGNMENT), 137 D(MajorOperatingSystemVersion,"__major_os_version__", 4), 138 D(MinorOperatingSystemVersion,"__minor_os_version__", 0), 139 D(MajorImageVersion,"__major_image_version__", 1), 140 D(MinorImageVersion,"__minor_image_version__", 0), 141 D(MajorSubsystemVersion,"__major_subsystem_version__", 4), 142 D(MinorSubsystemVersion,"__minor_subsystem_version__", 0), 143 D(Subsystem,"__subsystem__", 3), 144 D(SizeOfStackReserve,"__size_of_stack_reserve__", 0x2000000), 145 D(SizeOfStackCommit,"__size_of_stack_commit__", 0x1000), 146 D(SizeOfHeapReserve,"__size_of_heap_reserve__", 0x100000), 147 D(SizeOfHeapCommit,"__size_of_heap_commit__", 0x1000), 148 D(LoaderFlags,"__loader_flags__", 0x0), 149 { NULL, 0, 0, NULL, 0 } 150}; 151 152 153static void 154set_pe_name (char *name, long val) 155{ 156 int i; 157 /* Find the name and set it. */ 158 for (i = 0; init[i].ptr; i++) 159 { 160 if (strcmp (name, init[i].symbol) == 0) 161 { 162 init[i].value = val; 163 init[i].inited = 1; 164 return; 165 } 166 } 167 abort(); 168} 169 170 171static void 172set_pe_subsystem (void) 173{ 174 const char *sver; 175 int len; 176 int i; 177 static const struct 178 { 179 const char *name; 180 const int value; 181 const char *entry; 182 } 183 v[] = 184 { 185 { "native", 1, "_NtProcessStartup" }, 186 { "windows", 2, "_WinMainCRTStartup" }, 187 { "wwindows", 2, "_wWinMainCRTStartup" }, 188 { "console", 3, "_mainCRTStartup" }, 189 { "wconsole", 3, "_wmainCRTStartup" }, 190#if 0 191 /* The Microsoft linker does not recognize this. */ 192 { "os2", 5, "" }, 193#endif 194 { "posix", 7, "___PosixProcessStartup"}, 195 { 0, 0, 0 } 196 }; 197 198 sver = strchr (optarg, ':'); 199 if (sver == NULL) 200 len = strlen (optarg); 201 else 202 { 203 char *end; 204 205 len = sver - optarg; 206 set_pe_name ("__major_subsystem_version__", 207 strtoul (sver + 1, &end, 0)); 208 if (*end == '.') 209 set_pe_name ("__minor_subsystem_version__", 210 strtoul (end + 1, &end, 0)); 211 if (*end != '\0') 212 einfo ("%P: warning: bad version number in -subsystem option\n"); 213 } 214 215 for (i = 0; v[i].name; i++) 216 { 217 if (strncmp (optarg, v[i].name, len) == 0 218 && v[i].name[len] == '\0') 219 { 220 set_pe_name ("__subsystem__", v[i].value); 221 222 /* If the subsystem is windows, we use a different entry 223 point. We also register the entry point as an undefined 224 symbol. from lang_add_entry() The reason we do 225 this is so that the user 226 doesn't have to because they would have to use the -u 227 switch if they were specifying an entry point other than 228 _mainCRTStartup. Specifically, if creating a windows 229 application, entry point _WinMainCRTStartup must be 230 specified. What I have found for non console 231 applications (entry not _mainCRTStartup) is that the .obj 232 that contains mainCRTStartup is brought in since it is 233 the first encountered in libc.lib and it has other 234 symbols in it which will be pulled in by the link 235 process. To avoid this, adding -u with the entry point 236 name specified forces the correct .obj to be used. We 237 can avoid making the user do this by always adding the 238 entry point name as an undefined symbol. */ 239 lang_add_entry (v[i].entry, 1); 240 241 return; 242 } 243 } 244 einfo ("%P%F: invalid subsystem type %s\n", optarg); 245} 246 247 248static void 249set_pe_value (char *name) 250{ 251 char *end; 252 set_pe_name (name, strtoul (optarg, &end, 0)); 253 if (end == optarg) 254 { 255 einfo ("%P%F: invalid hex number for PE parameter '%s'\n", optarg); 256 } 257 258 optarg = end; 259} 260 261static void 262set_pe_stack_heap (char *resname, char *comname) 263{ 264 set_pe_value (resname); 265 if (*optarg == ',') 266 { 267 optarg++; 268 set_pe_value (comname); 269 } 270 else if (*optarg) 271 { 272 einfo ("%P%F: strange hex info for PE parameter '%s'\n", optarg); 273 } 274} 275 276 277static bfd_boolean 278gld${EMULATION_NAME}_handle_option (int optc) 279{ 280 switch (optc) 281 { 282 default: 283 return FALSE; 284 285 case OPTION_BASE_FILE: 286 link_info.base_file = fopen (optarg, FOPEN_WB); 287 if (link_info.base_file == NULL) 288 { 289 fprintf (stderr, "%s: Can't open base file %s\n", 290 program_name, optarg); 291 xexit (1); 292 } 293 break; 294 295 /* PE options */ 296 case OPTION_HEAP: 297 set_pe_stack_heap ("__size_of_heap_reserve__", "__size_of_heap_commit__"); 298 break; 299 case OPTION_STACK: 300 set_pe_stack_heap ("__size_of_stack_reserve__", "__size_of_stack_commit__"); 301 break; 302 case OPTION_SUBSYSTEM: 303 set_pe_subsystem (); 304 break; 305 case OPTION_MAJOR_OS_VERSION: 306 set_pe_value ("__major_os_version__"); 307 break; 308 case OPTION_MINOR_OS_VERSION: 309 set_pe_value ("__minor_os_version__"); 310 break; 311 case OPTION_MAJOR_SUBSYSTEM_VERSION: 312 set_pe_value ("__major_subsystem_version__"); 313 break; 314 case OPTION_MINOR_SUBSYSTEM_VERSION: 315 set_pe_value ("__minor_subsystem_version__"); 316 break; 317 case OPTION_MAJOR_IMAGE_VERSION: 318 set_pe_value ("__major_image_version__"); 319 break; 320 case OPTION_MINOR_IMAGE_VERSION: 321 set_pe_value ("__minor_image_version__"); 322 break; 323 case OPTION_FILE_ALIGNMENT: 324 set_pe_value ("__file_alignment__"); 325 break; 326 case OPTION_SECTION_ALIGNMENT: 327 set_pe_value ("__section_alignment__"); 328 break; 329 case OPTION_DLL: 330 set_pe_name ("__dll__", 1); 331 break; 332 case OPTION_IMAGE_BASE: 333 set_pe_value ("__image_base__"); 334 break; 335 } 336 return TRUE; 337} 338 339/* Assign values to the special symbols before the linker script is 340 read. */ 341 342static void 343gld_${EMULATION_NAME}_set_symbols (void) 344{ 345 /* Run through and invent symbols for all the 346 names and insert the defaults. */ 347 int j; 348 lang_statement_list_type *save; 349 350 if (!init[IMAGEBASEOFF].inited) 351 { 352 if (link_info.relocatable) 353 init[IMAGEBASEOFF].value = 0; 354 else if (init[DLLOFF].value) 355 init[IMAGEBASEOFF].value = BEOS_DLL_IMAGE_BASE; 356 else 357 init[IMAGEBASEOFF].value = BEOS_EXE_IMAGE_BASE; 358 } 359 360 /* Don't do any symbol assignments if this is a relocatable link. */ 361 if (link_info.relocatable) 362 return; 363 364 /* Glue the assignments into the abs section */ 365 save = stat_ptr; 366 367 stat_ptr = &(abs_output_section->children); 368 369 for (j = 0; init[j].ptr; j++) 370 { 371 long val = init[j].value; 372 lang_add_assignment (exp_assop ('=', init[j].symbol, exp_intop (val))); 373 if (init[j].size == sizeof(short)) 374 *(short *)init[j].ptr = val; 375 else if (init[j].size == sizeof(int)) 376 *(int *)init[j].ptr = val; 377 else if (init[j].size == sizeof(long)) 378 *(long *)init[j].ptr = val; 379 /* This might be a long long or other special type. */ 380 else if (init[j].size == sizeof(bfd_vma)) 381 *(bfd_vma *)init[j].ptr = val; 382 else abort(); 383 } 384 /* Restore the pointer. */ 385 stat_ptr = save; 386 387 if (pe.FileAlignment > 388 pe.SectionAlignment) 389 { 390 einfo ("%P: warning, file alignment > section alignment.\n"); 391 } 392} 393 394static void 395gld_${EMULATION_NAME}_after_open (void) 396{ 397 /* Pass the wacky PE command line options into the output bfd. 398 FIXME: This should be done via a function, rather than by 399 including an internal BFD header. */ 400 if (!coff_data(output_bfd)->pe) 401 { 402 einfo ("%F%P: PE operations on non PE file.\n"); 403 } 404 405 pe_data(output_bfd)->pe_opthdr = pe; 406 pe_data(output_bfd)->dll = init[DLLOFF].value; 407 408} 409 410/* Callback functions for qsort in sort_sections. */ 411 412static int 413sort_by_file_name (const void *a, const void *b) 414{ 415 const lang_statement_union_type *const *ra = a; 416 const lang_statement_union_type *const *rb = b; 417 int i, a_sec, b_sec; 418 419 i = strcmp ((*ra)->input_section.ifile->the_bfd->my_archive->filename, 420 (*rb)->input_section.ifile->the_bfd->my_archive->filename); 421 if (i != 0) 422 return i; 423 424 i = strcmp ((*ra)->input_section.ifile->filename, 425 (*rb)->input_section.ifile->filename); 426 if (i != 0) 427 return i; 428 /* the tail idata4/5 are the only ones without relocs to an 429 idata$6 section unless we are importing by ordinal, 430 so sort them to last to terminate the IAT 431 and HNT properly. if no reloc this one is import by ordinal 432 so we have to sort by section contents */ 433 434 if ( ((*ra)->input_section.section->reloc_count + (*rb)->input_section.section->reloc_count) ) 435 { 436 i = (((*ra)->input_section.section->reloc_count > 437 (*rb)->input_section.section->reloc_count) ? -1 : 0); 438 if ( i != 0) 439 return i; 440 441 return (((*ra)->input_section.section->reloc_count > 442 (*rb)->input_section.section->reloc_count) ? 0 : 1); 443 } 444 else 445 { 446 if ( (strcmp( (*ra)->input_section.section->name, ".idata$6") == 0) ) 447 return 0; /* don't sort .idata$6 or .idata$7 FIXME dlltool eliminate .idata$7 */ 448 449 if (! bfd_get_section_contents ((*ra)->input_section.ifile->the_bfd, 450 (*ra)->input_section.section, &a_sec, (file_ptr) 0, (bfd_size_type)sizeof(a_sec))) 451 einfo ("%F%B: Can't read contents of section .idata: %E\n", 452 (*ra)->input_section.ifile->the_bfd); 453 454 if (! bfd_get_section_contents ((*rb)->input_section.ifile->the_bfd, 455 (*rb)->input_section.section, &b_sec, (file_ptr) 0, (bfd_size_type)sizeof(b_sec) )) 456 einfo ("%F%B: Can't read contents of section .idata: %E\n", 457 (*rb)->input_section.ifile->the_bfd); 458 459 i = ((a_sec < b_sec) ? -1 : 0); 460 if ( i != 0) 461 return i; 462 return ((a_sec < b_sec) ? 0 : 1); 463 } 464return 0; 465} 466 467static int 468sort_by_section_name (const void *a, const void *b) 469{ 470 const lang_statement_union_type *const *ra = a; 471 const lang_statement_union_type *const *rb = b; 472 int i; 473 i = strcmp ((*ra)->input_section.section->name, 474 (*rb)->input_section.section->name); 475/* this is a hack to make .stab and .stabstr last, so we don't have 476 to fix strip/objcopy for .reloc sections. 477 FIXME stripping images with a .rsrc section still needs to be fixed */ 478 if ( i != 0) 479 { 480 if ((strncmp ((*ra)->input_section.section->name, ".stab", 5) == 0) 481 && (strncmp ((*rb)->input_section.section->name, ".stab", 5) != 0)) 482 return 1; 483 return i; 484 } 485 return i; 486} 487 488/* Subroutine of sort_sections to a contiguous subset of a list of sections. 489 NEXT_AFTER is the element after the last one to sort. 490 The result is a pointer to the last element's "next" pointer. */ 491 492static lang_statement_union_type ** 493sort_sections_1 (lang_statement_union_type **startptr, 494 lang_statement_union_type *next_after, 495 int count, 496 int (*sort_func) (const void *, const void *)) 497{ 498 lang_statement_union_type **vec; 499 lang_statement_union_type *p; 500 int i; 501 lang_statement_union_type **ret; 502 503 if (count == 0) 504 return startptr; 505 506 vec = ((lang_statement_union_type **) 507 xmalloc (count * sizeof (lang_statement_union_type *))); 508 509 for (p = *startptr, i = 0; i < count; i++, p = p->header.next) 510 vec[i] = p; 511 512 qsort (vec, count, sizeof (vec[0]), sort_func); 513 514 /* Fill in the next pointers again. */ 515 *startptr = vec[0]; 516 for (i = 0; i < count - 1; i++) 517 vec[i]->header.next = vec[i + 1]; 518 vec[i]->header.next = next_after; 519 ret = &vec[i]->header.next; 520 free (vec); 521 return ret; 522} 523 524/* Sort the .idata\$foo input sections of archives into filename order. 525 The reason is so dlltool can arrange to have the pe dll import information 526 generated correctly - the head of the list goes into dh.o, the tail into 527 dt.o, and the guts into ds[nnnn].o. Note that this is only needed for the 528 .idata section. 529 FIXME: This may no longer be necessary with grouped sections. Instead of 530 sorting on dh.o, ds[nnnn].o, dt.o, one could, for example, have dh.o use 531 .idata\$4h, have ds[nnnn].o use .idata\$4s[nnnn], and have dt.o use .idata\$4t. 532 This would have to be elaborated upon to handle multiple dll's 533 [assuming such an eloboration is possible of course]. 534 535 We also sort sections in '\$' wild statements. These are created by the 536 place_orphans routine to implement grouped sections. */ 537 538static void 539sort_sections (lang_statement_union_type *s) 540{ 541 for (; s ; s = s->header.next) 542 switch (s->header.type) 543 { 544 case lang_output_section_statement_enum: 545 sort_sections (s->output_section_statement.children.head); 546 break; 547 case lang_wild_statement_enum: 548 { 549 lang_statement_union_type **p = &s->wild_statement.children.head; 550 struct wildcard_list *sec; 551 552 for (sec = s->wild_statement.section_list; sec; sec = sec->next) 553 { 554 /* Is this the .idata section? */ 555 if (sec->spec.name != NULL 556 && strncmp (sec->spec.name, ".idata", 6) == 0) 557 { 558 /* Sort the children. We want to sort any objects in 559 the same archive. In order to handle the case of 560 including a single archive multiple times, we sort 561 all the children by archive name and then by object 562 name. After sorting them, we re-thread the pointer 563 chain. */ 564 565 while (*p) 566 { 567 lang_statement_union_type *start = *p; 568 if (start->header.type != lang_input_section_enum 569 || !start->input_section.ifile->the_bfd->my_archive) 570 p = &(start->header.next); 571 else 572 { 573 lang_statement_union_type *end; 574 int count; 575 576 for (end = start, count = 0; 577 end && (end->header.type 578 == lang_input_section_enum); 579 end = end->header.next) 580 count++; 581 582 p = sort_sections_1 (p, end, count, 583 sort_by_file_name); 584 } 585 } 586 break; 587 } 588 589 /* If this is a collection of grouped sections, sort them. 590 The linker script must explicitly mention "*(.foo\$)" or 591 "*(.foo\$*)". Don't sort them if \$ is not the last 592 character (not sure if this is really useful, but it 593 allows explicitly mentioning some \$ sections and letting 594 the linker handle the rest). */ 595 if (sec->spec.name != NULL) 596 { 597 char *q = strchr (sec->spec.name, '\$'); 598 599 if (q != NULL 600 && (q[1] == '\0' 601 || (q[1] == '*' && q[2] == '\0'))) 602 { 603 lang_statement_union_type *end; 604 int count; 605 606 for (end = *p, count = 0; end; end = end->header.next) 607 { 608 if (end->header.type != lang_input_section_enum) 609 abort (); 610 count++; 611 } 612 (void) sort_sections_1 (p, end, count, 613 sort_by_section_name); 614 } 615 break; 616 } 617 } 618 } 619 break; 620 default: 621 break; 622 } 623} 624 625static void 626gld_${EMULATION_NAME}_before_allocation (void) 627{ 628 extern lang_statement_list_type *stat_ptr; 629 630#ifdef TARGET_IS_ppcpe 631 /* Here we rummage through the found bfds to collect toc information */ 632 { 633 LANG_FOR_EACH_INPUT_STATEMENT (is) 634 { 635 if (!ppc_process_before_allocation(is->the_bfd, &link_info)) 636 { 637 einfo("Errors encountered processing file %s\n", is->filename); 638 } 639 } 640 } 641 642 /* We have seen it all. Allocate it, and carry on */ 643 ppc_allocate_toc_section (&link_info); 644#else 645#ifdef TARGET_IS_armpe 646 /* FIXME: we should be able to set the size of the interworking stub 647 section. 648 649 Here we rummage through the found bfds to collect glue 650 information. FIXME: should this be based on a command line 651 option? krk@cygnus.com */ 652 { 653 LANG_FOR_EACH_INPUT_STATEMENT (is) 654 { 655 if (!arm_process_before_allocation (is->the_bfd, & link_info)) 656 { 657 einfo ("Errors encountered processing file %s", is->filename); 658 } 659 } 660 } 661 662 /* We have seen it all. Allocate it, and carry on */ 663 arm_allocate_interworking_sections (& link_info); 664#endif /* TARGET_IS_armpe */ 665#endif /* TARGET_IS_ppcpe */ 666 667 sort_sections (stat_ptr->head); 668} 669 670/* Place an orphan section. We use this to put sections with a '\$' in them 671 into the right place. Any section with a '\$' in them (e.g. .text\$foo) 672 gets mapped to the output section with everything from the '\$' on stripped 673 (e.g. .text). 674 See the Microsoft Portable Executable and Common Object File Format 675 Specification 4.1, section 4.2, Grouped Sections. 676 677 FIXME: This is now handled by the linker script using wildcards, 678 but I'm leaving this here in case we want to enable it for sections 679 which are not mentioned in the linker script. */ 680 681static bfd_boolean 682gld${EMULATION_NAME}_place_orphan (lang_input_statement_type *file, asection *s) 683{ 684 const char *secname; 685 char *output_secname, *ps; 686 lang_output_section_statement_type *os; 687 lang_statement_union_type *l; 688 689 if ((s->flags & SEC_ALLOC) == 0) 690 return FALSE; 691 692 /* Don't process grouped sections unless doing a final link. 693 If they're marked as COMDAT sections, we don't want .text\$foo to 694 end up in .text and then have .text disappear because it's marked 695 link-once-discard. */ 696 if (link_info.relocatable) 697 return FALSE; 698 699 secname = bfd_get_section_name (s->owner, s); 700 701 /* Everything from the '\$' on gets deleted so don't allow '\$' as the 702 first character. */ 703 if (*secname == '\$') 704 einfo ("%P%F: section %s has '\$' as first character\n", secname); 705 if (strchr (secname + 1, '\$') == NULL) 706 return FALSE; 707 708 /* Look up the output section. The Microsoft specs say sections names in 709 image files never contain a '\$'. Fortunately, lang_..._lookup creates 710 the section if it doesn't exist. */ 711 output_secname = xstrdup (secname); 712 ps = strchr (output_secname + 1, '\$'); 713 *ps = 0; 714 os = lang_output_section_statement_lookup (output_secname); 715 716 /* Find the '\$' wild statement for this section. We currently require the 717 linker script to explicitly mention "*(.foo\$)". 718 FIXME: ppcpe.sc has .CRT\$foo in the .rdata section. According to the 719 Microsoft docs this isn't correct so it's not (currently) handled. */ 720 721 ps[0] = '\$'; 722 ps[1] = 0; 723 for (l = os->children.head; l; l = l->header.next) 724 if (l->header.type == lang_wild_statement_enum) 725 { 726 struct wildcard_list *sec; 727 728 for (sec = l->wild_statement.section_list; sec; sec = sec->next) 729 if (sec->spec.name && strcmp (sec->spec.name, output_secname) == 0) 730 break; 731 if (sec) 732 break; 733 } 734 ps[0] = 0; 735 if (l == NULL) 736#if 1 737 einfo ("%P%F: *(%s\$) missing from linker script\n", output_secname); 738#else /* FIXME: This block is untried. It exists to convey the intent, 739 should one decide to not require *(.foo\$) to appear in the linker 740 script. */ 741 { 742 lang_wild_statement_type *new; 743 struct wildcard_list *tmp; 744 745 tmp = (struct wildcard_list *) xmalloc (sizeof *tmp); 746 tmp->next = NULL; 747 tmp->spec.name = xmalloc (strlen (output_secname) + 2); 748 sprintf (tmp->spec.name, "%s\$", output_secname); 749 tmp->spec.exclude_name_list = NULL; 750 tmp->sorted = FALSE; 751 new = new_stat (lang_wild_statement, &os->children); 752 new->filename = NULL; 753 new->filenames_sorted = FALSE; 754 new->section_list = tmp; 755 new->keep_sections = FALSE; 756 lang_list_init (&new->children); 757 l = new; 758 } 759#endif 760 761 /* Link the input section in and we're done for now. 762 The sections still have to be sorted, but that has to wait until 763 all such sections have been processed by us. The sorting is done by 764 sort_sections. */ 765 lang_add_section (&l->wild_statement.children, s, os, file); 766 767 return TRUE; 768} 769 770static char * 771gld_${EMULATION_NAME}_get_script (int *isfile) 772EOF 773# Scripts compiled in. 774# sed commands to quote an ld script as a C string. 775sc="-f stringify.sed" 776 777cat >>e${EMULATION_NAME}.c <<EOF 778{ 779 *isfile = 0; 780 781 if (link_info.relocatable && config.build_constructors) 782 return 783EOF 784sed $sc ldscripts/${EMULATION_NAME}.xu >> e${EMULATION_NAME}.c 785echo ' ; else if (link_info.relocatable) return' >> e${EMULATION_NAME}.c 786sed $sc ldscripts/${EMULATION_NAME}.xr >> e${EMULATION_NAME}.c 787echo ' ; else if (!config.text_read_only) return' >> e${EMULATION_NAME}.c 788sed $sc ldscripts/${EMULATION_NAME}.xbn >> e${EMULATION_NAME}.c 789echo ' ; else if (!config.magic_demand_paged) return' >> e${EMULATION_NAME}.c 790sed $sc ldscripts/${EMULATION_NAME}.xn >> e${EMULATION_NAME}.c 791echo ' ; else return' >> e${EMULATION_NAME}.c 792sed $sc ldscripts/${EMULATION_NAME}.x >> e${EMULATION_NAME}.c 793echo '; }' >> e${EMULATION_NAME}.c 794 795cat >>e${EMULATION_NAME}.c <<EOF 796 797 798struct ld_emulation_xfer_struct ld_${EMULATION_NAME}_emulation = 799{ 800 gld_${EMULATION_NAME}_before_parse, 801 syslib_default, 802 hll_default, 803 after_parse_default, 804 gld_${EMULATION_NAME}_after_open, 805 after_allocation_default, 806 set_output_arch_default, 807 ldemul_default_target, 808 gld_${EMULATION_NAME}_before_allocation, 809 gld_${EMULATION_NAME}_get_script, 810 "${EMULATION_NAME}", 811 "${OUTPUT_FORMAT}", 812 NULL, /* finish */ 813 NULL, /* create output section statements */ 814 NULL, /* open dynamic archive */ 815 gld${EMULATION_NAME}_place_orphan, 816 gld_${EMULATION_NAME}_set_symbols, 817 NULL, /* parse_args */ 818 gld${EMULATION_NAME}_add_options, 819 gld${EMULATION_NAME}_handle_option, 820 NULL, /* unrecognized file */ 821 NULL, /* list options */ 822 NULL, /* recognized file */ 823 NULL, /* find_potential_libraries */ 824 NULL /* new_vers_pattern */ 825}; 826EOF 827