1 /* Support for the generic parts of PE/PEI, for BFD.
2 Copyright 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003
3 Free Software Foundation, Inc.
4 Written by Cygnus Solutions.
6 This file is part of BFD, the Binary File Descriptor library.
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
22 /* Most of this hacked by Steve Chamberlain,
25 PE/PEI rearrangement (and code added): Donn Terry
26 Softway Systems, Inc. */
28 /* Hey look, some documentation [and in a place you expect to find it]!
30 The main reference for the pei format is "Microsoft Portable Executable
31 and Common Object File Format Specification 4.1". Get it if you need to
32 do some serious hacking on this code.
35 "Peering Inside the PE: A Tour of the Win32 Portable Executable
36 File Format", MSJ 1994, Volume 9.
38 The *sole* difference between the pe format and the pei format is that the
39 latter has an MSDOS 2.0 .exe header on the front that prints the message
40 "This app must be run under Windows." (or some such).
41 (FIXME: Whether that statement is *really* true or not is unknown.
42 Are there more subtle differences between pe and pei formats?
43 For now assume there aren't. If you find one, then for God sakes
46 The Microsoft docs use the word "image" instead of "executable" because
47 the former can also refer to a DLL (shared library). Confusion can arise
48 because the `i' in `pei' also refers to "image". The `pe' format can
49 also create images (i.e. executables), it's just that to run on a win32
50 system you need to use the pei format.
52 FIXME: Please add more docs here so the next poor fool that has to hack
53 on this code has a chance of getting something accomplished without
54 wasting too much time. */
58 static bfd_boolean (*pe_saved_coff_bfd_print_private_bfd_data)
59 PARAMS ((bfd *, PTR)) =
60 #ifndef coff_bfd_print_private_bfd_data
63 coff_bfd_print_private_bfd_data;
64 #undef coff_bfd_print_private_bfd_data
67 static bfd_boolean pe_print_private_bfd_data PARAMS ((bfd *, PTR));
68 #define coff_bfd_print_private_bfd_data pe_print_private_bfd_data
70 static bfd_boolean (*pe_saved_coff_bfd_copy_private_bfd_data)
71 PARAMS ((bfd *, bfd *)) =
72 #ifndef coff_bfd_copy_private_bfd_data
75 coff_bfd_copy_private_bfd_data;
76 #undef coff_bfd_copy_private_bfd_data
79 static bfd_boolean pe_bfd_copy_private_bfd_data PARAMS ((bfd *, bfd *));
80 #define coff_bfd_copy_private_bfd_data pe_bfd_copy_private_bfd_data
82 #define coff_mkobject pe_mkobject
83 #define coff_mkobject_hook pe_mkobject_hook
85 #ifndef NO_COFF_RELOCS
86 static void coff_swap_reloc_in PARAMS ((bfd *, PTR, PTR));
87 static unsigned int coff_swap_reloc_out PARAMS ((bfd *, PTR, PTR));
89 static void coff_swap_filehdr_in PARAMS ((bfd *, PTR, PTR));
90 static void coff_swap_scnhdr_in PARAMS ((bfd *, PTR, PTR));
91 static bfd_boolean pe_mkobject PARAMS ((bfd *));
92 static PTR pe_mkobject_hook PARAMS ((bfd *, PTR, PTR));
94 #ifdef COFF_IMAGE_WITH_PE
95 /* This structure contains static variables used by the ILF code. */
96 typedef asection * asection_ptr;
102 struct bfd_in_memory * bim;
103 unsigned short magic;
106 unsigned int relcount;
108 coff_symbol_type * sym_cache;
109 coff_symbol_type * sym_ptr;
110 unsigned int sym_index;
112 unsigned int * sym_table;
113 unsigned int * table_ptr;
115 combined_entry_type * native_syms;
116 combined_entry_type * native_ptr;
118 coff_symbol_type ** sym_ptr_table;
119 coff_symbol_type ** sym_ptr_ptr;
121 unsigned int sec_index;
125 char * end_string_ptr;
130 struct internal_reloc * int_reltab;
134 static asection_ptr pe_ILF_make_a_section PARAMS ((pe_ILF_vars *, const char *, unsigned int, flagword));
135 static void pe_ILF_make_a_reloc PARAMS ((pe_ILF_vars *, bfd_vma, bfd_reloc_code_real_type, asection_ptr));
136 static void pe_ILF_make_a_symbol PARAMS ((pe_ILF_vars *, const char *, const char *, asection_ptr, flagword));
137 static void pe_ILF_save_relocs PARAMS ((pe_ILF_vars *, asection_ptr));
138 static void pe_ILF_make_a_symbol_reloc PARAMS ((pe_ILF_vars *, bfd_vma, bfd_reloc_code_real_type, struct symbol_cache_entry **, unsigned int));
139 static bfd_boolean pe_ILF_build_a_bfd PARAMS ((bfd *, unsigned int, bfd_byte *, bfd_byte *, unsigned int, unsigned int));
140 static const bfd_target * pe_ILF_object_p PARAMS ((bfd *));
141 static const bfd_target * pe_bfd_object_p PARAMS ((bfd *));
142 #endif /* COFF_IMAGE_WITH_PE */
144 /**********************************************************************/
146 #ifndef NO_COFF_RELOCS
148 coff_swap_reloc_in (abfd, src, dst)
153 RELOC *reloc_src = (RELOC *) src;
154 struct internal_reloc *reloc_dst = (struct internal_reloc *) dst;
156 reloc_dst->r_vaddr = H_GET_32 (abfd, reloc_src->r_vaddr);
157 reloc_dst->r_symndx = H_GET_S32 (abfd, reloc_src->r_symndx);
159 reloc_dst->r_type = H_GET_16 (abfd, reloc_src->r_type);
161 #ifdef SWAP_IN_RELOC_OFFSET
162 reloc_dst->r_offset = SWAP_IN_RELOC_OFFSET (abfd, reloc_src->r_offset);
167 coff_swap_reloc_out (abfd, src, dst)
172 struct internal_reloc *reloc_src = (struct internal_reloc *)src;
173 struct external_reloc *reloc_dst = (struct external_reloc *)dst;
174 H_PUT_32 (abfd, reloc_src->r_vaddr, reloc_dst->r_vaddr);
175 H_PUT_32 (abfd, reloc_src->r_symndx, reloc_dst->r_symndx);
177 H_PUT_16 (abfd, reloc_src->r_type, reloc_dst->r_type);
179 #ifdef SWAP_OUT_RELOC_OFFSET
180 SWAP_OUT_RELOC_OFFSET (abfd, reloc_src->r_offset, reloc_dst->r_offset);
182 #ifdef SWAP_OUT_RELOC_EXTRA
183 SWAP_OUT_RELOC_EXTRA(abfd, reloc_src, reloc_dst);
187 #endif /* not NO_COFF_RELOCS */
190 coff_swap_filehdr_in (abfd, src, dst)
195 FILHDR *filehdr_src = (FILHDR *) src;
196 struct internal_filehdr *filehdr_dst = (struct internal_filehdr *) dst;
197 filehdr_dst->f_magic = H_GET_16 (abfd, filehdr_src->f_magic);
198 filehdr_dst->f_nscns = H_GET_16 (abfd, filehdr_src-> f_nscns);
199 filehdr_dst->f_timdat = H_GET_32 (abfd, filehdr_src-> f_timdat);
201 filehdr_dst->f_nsyms = H_GET_32 (abfd, filehdr_src-> f_nsyms);
202 filehdr_dst->f_flags = H_GET_16 (abfd, filehdr_src-> f_flags);
203 filehdr_dst->f_symptr = H_GET_32 (abfd, filehdr_src->f_symptr);
205 /* Other people's tools sometimes generate headers with an nsyms but
207 if (filehdr_dst->f_nsyms != 0 && filehdr_dst->f_symptr == 0)
209 filehdr_dst->f_nsyms = 0;
210 filehdr_dst->f_flags |= F_LSYMS;
213 filehdr_dst->f_opthdr = H_GET_16 (abfd, filehdr_src-> f_opthdr);
216 #ifdef COFF_IMAGE_WITH_PE
217 # define coff_swap_filehdr_out _bfd_XXi_only_swap_filehdr_out
219 # define coff_swap_filehdr_out _bfd_pe_only_swap_filehdr_out
223 coff_swap_scnhdr_in (abfd, ext, in)
228 SCNHDR *scnhdr_ext = (SCNHDR *) ext;
229 struct internal_scnhdr *scnhdr_int = (struct internal_scnhdr *) in;
231 memcpy(scnhdr_int->s_name, scnhdr_ext->s_name, sizeof (scnhdr_int->s_name));
232 scnhdr_int->s_vaddr = GET_SCNHDR_VADDR (abfd, scnhdr_ext->s_vaddr);
233 scnhdr_int->s_paddr = GET_SCNHDR_PADDR (abfd, scnhdr_ext->s_paddr);
234 scnhdr_int->s_size = GET_SCNHDR_SIZE (abfd, scnhdr_ext->s_size);
235 scnhdr_int->s_scnptr = GET_SCNHDR_SCNPTR (abfd, scnhdr_ext->s_scnptr);
236 scnhdr_int->s_relptr = GET_SCNHDR_RELPTR (abfd, scnhdr_ext->s_relptr);
237 scnhdr_int->s_lnnoptr = GET_SCNHDR_LNNOPTR (abfd, scnhdr_ext->s_lnnoptr);
238 scnhdr_int->s_flags = H_GET_32 (abfd, scnhdr_ext->s_flags);
240 /* MS handles overflow of line numbers by carrying into the reloc
241 field (it appears). Since it's supposed to be zero for PE
242 *IMAGE* format, that's safe. This is still a bit iffy. */
243 #ifdef COFF_IMAGE_WITH_PE
244 scnhdr_int->s_nlnno = (H_GET_16 (abfd, scnhdr_ext->s_nlnno)
245 + (H_GET_16 (abfd, scnhdr_ext->s_nreloc) << 16));
246 scnhdr_int->s_nreloc = 0;
248 scnhdr_int->s_nreloc = H_GET_16 (abfd, scnhdr_ext->s_nreloc);
249 scnhdr_int->s_nlnno = H_GET_16 (abfd, scnhdr_ext->s_nlnno);
252 if (scnhdr_int->s_vaddr != 0)
254 scnhdr_int->s_vaddr += pe_data (abfd)->pe_opthdr.ImageBase;
255 scnhdr_int->s_vaddr &= 0xffffffff;
258 #ifndef COFF_NO_HACK_SCNHDR_SIZE
259 /* If this section holds uninitialized data, use the virtual size
260 (stored in s_paddr) instead of the physical size. */
261 if ((scnhdr_int->s_flags & IMAGE_SCN_CNT_UNINITIALIZED_DATA) != 0
262 && (scnhdr_int->s_paddr > 0))
264 /* Always set it for non pe-obj files, and don't overwrite it
265 if it's zero for object files. */
266 if (! bfd_pe_executable_p (abfd) || !scnhdr_int->s_size)
267 scnhdr_int->s_size = scnhdr_int->s_paddr;
269 /* This code used to set scnhdr_int->s_paddr to 0. However,
270 coff_set_alignment_hook stores s_paddr in virt_size, which
271 only works if it correctly holds the virtual size of the
282 bfd_size_type amt = sizeof (pe_data_type);
284 abfd->tdata.pe_obj_data = (struct pe_tdata *) bfd_zalloc (abfd, amt);
286 if (abfd->tdata.pe_obj_data == 0)
293 /* in_reloc_p is architecture dependent. */
294 pe->in_reloc_p = in_reloc_p;
296 #ifdef PEI_FORCE_MINIMUM_ALIGNMENT
297 pe->force_minimum_alignment = 1;
299 #ifdef PEI_TARGET_SUBSYSTEM
300 pe->target_subsystem = PEI_TARGET_SUBSYSTEM;
306 /* Create the COFF backend specific information. */
308 pe_mkobject_hook (abfd, filehdr, aouthdr)
311 PTR aouthdr ATTRIBUTE_UNUSED;
313 struct internal_filehdr *internal_f = (struct internal_filehdr *) filehdr;
316 if (! pe_mkobject (abfd))
320 pe->coff.sym_filepos = internal_f->f_symptr;
321 /* These members communicate important constants about the symbol
322 table to GDB's symbol-reading code. These `constants'
323 unfortunately vary among coff implementations... */
324 pe->coff.local_n_btmask = N_BTMASK;
325 pe->coff.local_n_btshft = N_BTSHFT;
326 pe->coff.local_n_tmask = N_TMASK;
327 pe->coff.local_n_tshift = N_TSHIFT;
328 pe->coff.local_symesz = SYMESZ;
329 pe->coff.local_auxesz = AUXESZ;
330 pe->coff.local_linesz = LINESZ;
332 pe->coff.timestamp = internal_f->f_timdat;
334 obj_raw_syment_count (abfd) =
335 obj_conv_table_size (abfd) =
338 pe->real_flags = internal_f->f_flags;
340 if ((internal_f->f_flags & F_DLL) != 0)
343 if ((internal_f->f_flags & IMAGE_FILE_DEBUG_STRIPPED) == 0)
344 abfd->flags |= HAS_DEBUG;
346 #ifdef COFF_IMAGE_WITH_PE
348 pe->pe_opthdr = ((struct internal_aouthdr *)aouthdr)->pe;
352 if (! _bfd_coff_arm_set_private_flags (abfd, internal_f->f_flags))
353 coff_data (abfd) ->flags = 0;
360 pe_print_private_bfd_data (abfd, vfile)
364 FILE *file = (FILE *) vfile;
366 if (!_bfd_XX_print_private_bfd_data_common (abfd, vfile))
369 if (pe_saved_coff_bfd_print_private_bfd_data != NULL)
373 return pe_saved_coff_bfd_print_private_bfd_data (abfd, vfile);
379 /* Copy any private info we understand from the input bfd
380 to the output bfd. */
383 pe_bfd_copy_private_bfd_data (ibfd, obfd)
386 if (!_bfd_XX_bfd_copy_private_bfd_data_common (ibfd, obfd))
389 if (pe_saved_coff_bfd_copy_private_bfd_data)
390 return pe_saved_coff_bfd_copy_private_bfd_data (ibfd, obfd);
395 #define coff_bfd_copy_private_section_data \
396 _bfd_XX_bfd_copy_private_section_data
398 #define coff_get_symbol_info _bfd_XX_get_symbol_info
400 #ifdef COFF_IMAGE_WITH_PE
402 /* Code to handle Microsoft's Image Library Format.
403 Also known as LINK6 format.
404 Documentation about this format can be found at:
406 http://msdn.microsoft.com/library/specs/pecoff_section8.htm */
408 /* The following constants specify the sizes of the various data
409 structures that we have to create in order to build a bfd describing
410 an ILF object file. The final "+ 1" in the definitions of SIZEOF_IDATA6
411 and SIZEOF_IDATA7 below is to allow for the possibility that we might
412 need a padding byte in order to ensure 16 bit alignment for the section's
415 The value for SIZEOF_ILF_STRINGS is computed as follows:
417 There will be NUM_ILF_SECTIONS section symbols. Allow 9 characters
418 per symbol for their names (longest section name is .idata$x).
420 There will be two symbols for the imported value, one the symbol name
421 and one with _imp__ prefixed. Allowing for the terminating nul's this
422 is strlen (symbol_name) * 2 + 8 + 21 + strlen (source_dll).
424 The strings in the string table must start STRING__SIZE_SIZE bytes into
425 the table in order to for the string lookup code in coffgen/coffcode to
427 #define NUM_ILF_RELOCS 8
428 #define NUM_ILF_SECTIONS 6
429 #define NUM_ILF_SYMS (2 + NUM_ILF_SECTIONS)
431 #define SIZEOF_ILF_SYMS (NUM_ILF_SYMS * sizeof (* vars.sym_cache))
432 #define SIZEOF_ILF_SYM_TABLE (NUM_ILF_SYMS * sizeof (* vars.sym_table))
433 #define SIZEOF_ILF_NATIVE_SYMS (NUM_ILF_SYMS * sizeof (* vars.native_syms))
434 #define SIZEOF_ILF_SYM_PTR_TABLE (NUM_ILF_SYMS * sizeof (* vars.sym_ptr_table))
435 #define SIZEOF_ILF_EXT_SYMS (NUM_ILF_SYMS * sizeof (* vars.esym_table))
436 #define SIZEOF_ILF_RELOCS (NUM_ILF_RELOCS * sizeof (* vars.reltab))
437 #define SIZEOF_ILF_INT_RELOCS (NUM_ILF_RELOCS * sizeof (* vars.int_reltab))
438 #define SIZEOF_ILF_STRINGS (strlen (symbol_name) * 2 + 8 \
439 + 21 + strlen (source_dll) \
440 + NUM_ILF_SECTIONS * 9 \
442 #define SIZEOF_IDATA2 (5 * 4)
443 #define SIZEOF_IDATA4 (1 * 4)
444 #define SIZEOF_IDATA5 (1 * 4)
445 #define SIZEOF_IDATA6 (2 + strlen (symbol_name) + 1 + 1)
446 #define SIZEOF_IDATA7 (strlen (source_dll) + 1 + 1)
447 #define SIZEOF_ILF_SECTIONS (NUM_ILF_SECTIONS * sizeof (struct coff_section_tdata))
449 #define ILF_DATA_SIZE \
450 sizeof (* vars.bim) \
452 + SIZEOF_ILF_SYM_TABLE \
453 + SIZEOF_ILF_NATIVE_SYMS \
454 + SIZEOF_ILF_SYM_PTR_TABLE \
455 + SIZEOF_ILF_EXT_SYMS \
456 + SIZEOF_ILF_RELOCS \
457 + SIZEOF_ILF_INT_RELOCS \
458 + SIZEOF_ILF_STRINGS \
464 + SIZEOF_ILF_SECTIONS \
465 + MAX_TEXT_SECTION_SIZE
467 /* Create an empty relocation against the given symbol. */
469 pe_ILF_make_a_symbol_reloc (pe_ILF_vars * vars,
471 bfd_reloc_code_real_type reloc,
472 struct symbol_cache_entry ** sym,
473 unsigned int sym_index)
476 struct internal_reloc * internal;
478 entry = vars->reltab + vars->relcount;
479 internal = vars->int_reltab + vars->relcount;
481 entry->address = address;
483 entry->howto = bfd_reloc_type_lookup (vars->abfd, reloc);
484 entry->sym_ptr_ptr = sym;
486 internal->r_vaddr = address;
487 internal->r_symndx = sym_index;
488 internal->r_type = entry->howto->type;
489 #if 0 /* These fields do not need to be initialised. */
490 internal->r_size = 0;
491 internal->r_extern = 0;
492 internal->r_offset = 0;
497 BFD_ASSERT (vars->relcount <= NUM_ILF_RELOCS);
500 /* Create an empty relocation against the given section. */
502 pe_ILF_make_a_reloc (pe_ILF_vars * vars,
504 bfd_reloc_code_real_type reloc,
507 pe_ILF_make_a_symbol_reloc (vars, address, reloc, sec->symbol_ptr_ptr,
508 coff_section_data (vars->abfd, sec)->i);
511 /* Move the queued relocs into the given section. */
513 pe_ILF_save_relocs (pe_ILF_vars * vars,
516 /* Make sure that there is somewhere to store the internal relocs. */
517 if (coff_section_data (vars->abfd, sec) == NULL)
518 /* We should probably return an error indication here. */
521 coff_section_data (vars->abfd, sec)->relocs = vars->int_reltab;
522 coff_section_data (vars->abfd, sec)->keep_relocs = TRUE;
524 sec->relocation = vars->reltab;
525 sec->reloc_count = vars->relcount;
526 sec->flags |= SEC_RELOC;
528 vars->reltab += vars->relcount;
529 vars->int_reltab += vars->relcount;
532 BFD_ASSERT ((bfd_byte *) vars->int_reltab < (bfd_byte *) vars->string_table);
535 /* Create a global symbol and add it to the relevant tables. */
537 pe_ILF_make_a_symbol (pe_ILF_vars * vars,
539 const char * symbol_name,
540 asection_ptr section,
541 flagword extra_flags)
543 coff_symbol_type * sym;
544 combined_entry_type * ent;
546 unsigned short sclass;
548 if (extra_flags & BSF_LOCAL)
554 if (vars->magic == THUMBPEMAGIC)
556 if (extra_flags & BSF_FUNCTION)
557 sclass = C_THUMBEXTFUNC;
558 else if (extra_flags & BSF_LOCAL)
559 sclass = C_THUMBSTAT;
565 BFD_ASSERT (vars->sym_index < NUM_ILF_SYMS);
568 ent = vars->native_ptr;
569 esym = vars->esym_ptr;
571 /* Copy the symbol's name into the string table. */
572 sprintf (vars->string_ptr, "%s%s", prefix, symbol_name);
575 section = (asection_ptr) & bfd_und_section;
577 /* Initialise the external symbol. */
578 H_PUT_32 (vars->abfd, vars->string_ptr - vars->string_table,
580 H_PUT_16 (vars->abfd, section->target_index, esym->e_scnum);
581 esym->e_sclass[0] = sclass;
583 /* The following initialisations are unnecessary - the memory is
584 zero initialised. They are just kept here as reminders. */
586 esym->e.e.e_zeroes = 0;
588 esym->e_type = T_NULL;
592 /* Initialise the internal symbol structure. */
593 ent->u.syment.n_sclass = sclass;
594 ent->u.syment.n_scnum = section->target_index;
595 ent->u.syment._n._n_n._n_offset = (long) sym;
597 #if 0 /* See comment above. */
598 ent->u.syment.n_value = 0;
599 ent->u.syment.n_flags = 0;
600 ent->u.syment.n_type = T_NULL;
601 ent->u.syment.n_numaux = 0;
605 sym->symbol.the_bfd = vars->abfd;
606 sym->symbol.name = vars->string_ptr;
607 sym->symbol.flags = BSF_EXPORT | BSF_GLOBAL | extra_flags;
608 sym->symbol.section = section;
611 #if 0 /* See comment above. */
612 sym->symbol.value = 0;
613 sym->symbol.udata.i = 0;
614 sym->done_lineno = FALSE;
618 * vars->table_ptr = vars->sym_index;
619 * vars->sym_ptr_ptr = sym;
621 /* Adjust pointers for the next symbol. */
624 vars->sym_ptr_ptr ++;
628 vars->string_ptr += strlen (symbol_name) + strlen (prefix) + 1;
630 BFD_ASSERT (vars->string_ptr < vars->end_string_ptr);
633 /* Create a section. */
635 pe_ILF_make_a_section (pe_ILF_vars * vars,
638 flagword extra_flags)
643 sec = bfd_make_section_old_way (vars->abfd, name);
647 flags = SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_KEEP | SEC_IN_MEMORY;
649 bfd_set_section_flags (vars->abfd, sec, flags | extra_flags);
651 bfd_set_section_alignment (vars->abfd, sec, 2);
653 /* Check that we will not run out of space. */
654 BFD_ASSERT (vars->data + size < vars->bim->buffer + vars->bim->size);
656 /* Set the section size and contents. The actual
657 contents are filled in by our parent. */
658 bfd_set_section_size (vars->abfd, sec, (bfd_size_type) size);
659 sec->contents = vars->data;
660 sec->target_index = vars->sec_index ++;
662 /* Advance data pointer in the vars structure. */
665 /* Skip the padding byte if it was not needed.
666 The logic here is that if the string length is odd,
667 then the entire string length, including the null byte,
668 is even and so the extra, padding byte, is not needed. */
672 /* Create a coff_section_tdata structure for our use. */
673 sec->used_by_bfd = (struct coff_section_tdata *) vars->data;
674 vars->data += sizeof (struct coff_section_tdata);
676 BFD_ASSERT (vars->data <= vars->bim->buffer + vars->bim->size);
678 /* Create a symbol to refer to this section. */
679 pe_ILF_make_a_symbol (vars, "", name, sec, BSF_LOCAL);
681 /* Cache the index to the symbol in the coff_section_data structure. */
682 coff_section_data (vars->abfd, sec)->i = vars->sym_index - 1;
687 /* This structure contains the code that goes into the .text section
688 in order to perform a jump into the DLL lookup table. The entries
689 in the table are index by the magic number used to represent the
690 machine type in the PE file. The contents of the data[] arrays in
691 these entries are stolen from the jtab[] arrays in ld/pe-dll.c.
692 The SIZE field says how many bytes in the DATA array are actually
693 used. The OFFSET field says where in the data array the address
694 of the .idata$5 section should be placed. */
695 #define MAX_TEXT_SECTION_SIZE 32
699 unsigned short magic;
700 unsigned char data[MAX_TEXT_SECTION_SIZE];
706 static jump_table jtab[] =
710 { 0xff, 0x25, 0x00, 0x00, 0x00, 0x00, 0x90, 0x90 },
716 { MC68MAGIC, { /* XXX fill me in */ }, 0, 0 },
718 #ifdef MIPS_ARCH_MAGIC_WINCE
719 { MIPS_ARCH_MAGIC_WINCE,
720 { 0x00, 0x00, 0x08, 0x3c, 0x00, 0x00, 0x08, 0x8d,
721 0x08, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00 },
726 #ifdef SH_ARCH_MAGIC_WINCE
727 { SH_ARCH_MAGIC_WINCE,
728 { 0x01, 0xd0, 0x02, 0x60, 0x2b, 0x40,
729 0x09, 0x00, 0x00, 0x00, 0x00, 0x00 },
736 { 0x00, 0xc0, 0x9f, 0xe5, 0x00, 0xf0,
737 0x9c, 0xe5, 0x00, 0x00, 0x00, 0x00},
744 { 0x40, 0xb4, 0x02, 0x4e, 0x36, 0x68, 0xb4, 0x46,
745 0x40, 0xbc, 0x60, 0x47, 0x00, 0x00, 0x00, 0x00 },
753 #define NUM_ENTRIES(a) (sizeof (a) / sizeof (a)[0])
756 /* Build a full BFD from the information supplied in a ILF object. */
758 pe_ILF_build_a_bfd (bfd * abfd,
760 bfd_byte * symbol_name,
761 bfd_byte * source_dll,
762 unsigned int ordinal,
767 struct internal_filehdr internal_f;
768 unsigned int import_type;
769 unsigned int import_name_type;
770 asection_ptr id4, id5, id6 = NULL, text = NULL;
771 coff_symbol_type ** imp_sym;
772 unsigned int imp_index;
774 /* Decode and verify the types field of the ILF structure. */
775 import_type = types & 0x3;
776 import_name_type = (types & 0x1c) >> 2;
785 /* XXX code yet to be written. */
786 _bfd_error_handler (_("%s: Unhandled import type; %x"),
787 bfd_archive_filename (abfd), import_type);
791 _bfd_error_handler (_("%s: Unrecognised import type; %x"),
792 bfd_archive_filename (abfd), import_type);
796 switch (import_name_type)
800 case IMPORT_NAME_NOPREFIX:
801 case IMPORT_NAME_UNDECORATE:
805 _bfd_error_handler (_("%s: Unrecognised import name type; %x"),
806 bfd_archive_filename (abfd), import_name_type);
810 /* Initialise local variables.
812 Note these are kept in a structure rather than being
813 declared as statics since bfd frowns on global variables.
815 We are going to construct the contents of the BFD in memory,
816 so allocate all the space that we will need right now. */
817 ptr = bfd_zalloc (abfd, (bfd_size_type) ILF_DATA_SIZE);
821 /* Create a bfd_in_memory structure. */
822 vars.bim = (struct bfd_in_memory *) ptr;
823 vars.bim->buffer = ptr;
824 vars.bim->size = ILF_DATA_SIZE;
825 ptr += sizeof (* vars.bim);
827 /* Initialise the pointers to regions of the memory and the
828 other contents of the pe_ILF_vars structure as well. */
829 vars.sym_cache = (coff_symbol_type *) ptr;
830 vars.sym_ptr = (coff_symbol_type *) ptr;
832 ptr += SIZEOF_ILF_SYMS;
834 vars.sym_table = (unsigned int *) ptr;
835 vars.table_ptr = (unsigned int *) ptr;
836 ptr += SIZEOF_ILF_SYM_TABLE;
838 vars.native_syms = (combined_entry_type *) ptr;
839 vars.native_ptr = (combined_entry_type *) ptr;
840 ptr += SIZEOF_ILF_NATIVE_SYMS;
842 vars.sym_ptr_table = (coff_symbol_type **) ptr;
843 vars.sym_ptr_ptr = (coff_symbol_type **) ptr;
844 ptr += SIZEOF_ILF_SYM_PTR_TABLE;
846 vars.esym_table = (SYMENT *) ptr;
847 vars.esym_ptr = (SYMENT *) ptr;
848 ptr += SIZEOF_ILF_EXT_SYMS;
850 vars.reltab = (arelent *) ptr;
852 ptr += SIZEOF_ILF_RELOCS;
854 vars.int_reltab = (struct internal_reloc *) ptr;
855 ptr += SIZEOF_ILF_INT_RELOCS;
857 vars.string_table = ptr;
858 vars.string_ptr = ptr + STRING_SIZE_SIZE;
859 ptr += SIZEOF_ILF_STRINGS;
860 vars.end_string_ptr = ptr;
862 /* The remaining space in bim->buffer is used
863 by the pe_ILF_make_a_section() function. */
869 /* Create the initial .idata$<n> sections:
870 [.idata$2: Import Directory Table -- not needed]
871 .idata$4: Import Lookup Table
872 .idata$5: Import Address Table
874 Note we do not create a .idata$3 section as this is
875 created for us by the linker script. */
876 id4 = pe_ILF_make_a_section (& vars, ".idata$4", SIZEOF_IDATA4, 0);
877 id5 = pe_ILF_make_a_section (& vars, ".idata$5", SIZEOF_IDATA5, 0);
878 if (id4 == NULL || id5 == NULL)
881 /* Fill in the contents of these sections. */
882 if (import_name_type == IMPORT_ORDINAL)
885 /* XXX - treat as IMPORT_NAME ??? */
888 * (unsigned int *) id4->contents = ordinal | 0x80000000;
889 * (unsigned int *) id5->contents = ordinal | 0x80000000;
895 /* Create .idata$6 - the Hint Name Table. */
896 id6 = pe_ILF_make_a_section (& vars, ".idata$6", SIZEOF_IDATA6, 0);
900 /* If necessary, trim the import symbol name. */
901 symbol = symbol_name;
903 if (import_name_type != IMPORT_NAME)
904 /* Skip any prefix in symbol_name. */
905 while (*symbol == '@' || * symbol == '?' || * symbol == '_')
908 if (import_name_type == IMPORT_NAME_UNDECORATE)
910 /* Truncate at the first '@' */
911 while (* symbol != 0 && * symbol != '@')
917 id6->contents[0] = ordinal & 0xff;
918 id6->contents[1] = ordinal >> 8;
920 strcpy (id6->contents + 2, symbol);
923 if (import_name_type != IMPORT_ORDINAL)
925 pe_ILF_make_a_reloc (&vars, (bfd_vma) 0, BFD_RELOC_RVA, id6);
926 pe_ILF_save_relocs (&vars, id4);
928 pe_ILF_make_a_reloc (&vars, (bfd_vma) 0, BFD_RELOC_RVA, id6);
929 pe_ILF_save_relocs (&vars, id5);
932 /* Create extra sections depending upon the type of import we are dealing with. */
938 /* Create a .text section.
939 First we need to look up its contents in the jump table. */
940 for (i = NUM_ENTRIES (jtab); i--;)
942 if (jtab[i].size == 0)
944 if (jtab[i].magic == magic)
947 /* If we did not find a matching entry something is wrong. */
951 /* Create the .text section. */
952 text = pe_ILF_make_a_section (& vars, ".text", jtab[i].size, SEC_CODE);
956 /* Copy in the jump code. */
957 memcpy (text->contents, jtab[i].data, jtab[i].size);
959 /* Create an import symbol. */
960 pe_ILF_make_a_symbol (& vars, "__imp_", symbol_name, id5, 0);
961 imp_sym = vars.sym_ptr_ptr - 1;
962 imp_index = vars.sym_index - 1;
964 /* Create a reloc for the data in the text section. */
965 #ifdef MIPS_ARCH_MAGIC_WINCE
966 if (magic == MIPS_ARCH_MAGIC_WINCE)
968 pe_ILF_make_a_symbol_reloc (&vars, (bfd_vma) 0, BFD_RELOC_HI16_S,
969 (struct symbol_cache_entry **) imp_sym,
971 pe_ILF_make_a_reloc (&vars, (bfd_vma) 0, BFD_RELOC_LO16, text);
972 pe_ILF_make_a_symbol_reloc (&vars, (bfd_vma) 4, BFD_RELOC_LO16,
973 (struct symbol_cache_entry **) imp_sym,
978 pe_ILF_make_a_symbol_reloc (&vars, (bfd_vma) jtab[i].offset,
979 BFD_RELOC_32, (asymbol **) imp_sym,
982 pe_ILF_save_relocs (& vars, text);
989 /* XXX code not yet written. */
993 /* Initialise the bfd. */
994 memset (& internal_f, 0, sizeof (internal_f));
996 internal_f.f_magic = magic;
997 internal_f.f_symptr = 0;
998 internal_f.f_nsyms = 0;
999 internal_f.f_flags = F_AR32WR | F_LNNO; /* XXX is this correct ? */
1001 if ( ! bfd_set_start_address (abfd, (bfd_vma) 0)
1002 || ! bfd_coff_set_arch_mach_hook (abfd, & internal_f))
1005 if (bfd_coff_mkobject_hook (abfd, (PTR) & internal_f, NULL) == NULL)
1008 coff_data (abfd)->pe = 1;
1010 if (vars.magic == THUMBPEMAGIC)
1011 /* Stop some linker warnings about thumb code not supporting interworking. */
1012 coff_data (abfd)->flags |= F_INTERWORK | F_INTERWORK_SET;
1015 /* Switch from file contents to memory contents. */
1016 bfd_cache_close (abfd);
1018 abfd->iostream = (PTR) vars.bim;
1019 abfd->flags |= BFD_IN_MEMORY /* | HAS_LOCALS */;
1021 obj_sym_filepos (abfd) = 0;
1023 /* Now create a symbol describing the imported value. */
1024 switch (import_type)
1027 pe_ILF_make_a_symbol (& vars, "", symbol_name, text,
1028 BSF_NOT_AT_END | BSF_FUNCTION);
1030 /* Create an import symbol for the DLL, without the
1032 ptr = strrchr (source_dll, '.');
1035 pe_ILF_make_a_symbol (& vars, "__IMPORT_DESCRIPTOR_", source_dll, NULL, 0);
1041 /* Nothing to do here. */
1045 /* XXX code not yet written. */
1049 /* Point the bfd at the symbol table. */
1050 obj_symbols (abfd) = vars.sym_cache;
1051 bfd_get_symcount (abfd) = vars.sym_index;
1053 obj_raw_syments (abfd) = vars.native_syms;
1054 obj_raw_syment_count (abfd) = vars.sym_index;
1056 obj_coff_external_syms (abfd) = (PTR) vars.esym_table;
1057 obj_coff_keep_syms (abfd) = TRUE;
1059 obj_convert (abfd) = vars.sym_table;
1060 obj_conv_table_size (abfd) = vars.sym_index;
1062 obj_coff_strings (abfd) = vars.string_table;
1063 obj_coff_keep_strings (abfd) = TRUE;
1065 abfd->flags |= HAS_SYMS;
1070 /* We have detected a Image Library Format archive element.
1071 Decode the element and return the appropriate target. */
1072 static const bfd_target *
1073 pe_ILF_object_p (bfd * abfd)
1075 bfd_byte buffer[16];
1077 bfd_byte * symbol_name;
1078 bfd_byte * source_dll;
1079 unsigned int machine;
1081 unsigned int ordinal;
1085 /* Upon entry the first four buyes of the ILF header have
1086 already been read. Now read the rest of the header. */
1087 if (bfd_bread (buffer, (bfd_size_type) 16, abfd) != 16)
1092 /* We do not bother to check the version number.
1093 version = H_GET_16 (abfd, ptr); */
1096 machine = H_GET_16 (abfd, ptr);
1099 /* Check that the machine type is recognised. */
1104 case IMAGE_FILE_MACHINE_UNKNOWN:
1105 case IMAGE_FILE_MACHINE_ALPHA:
1106 case IMAGE_FILE_MACHINE_ALPHA64:
1107 case IMAGE_FILE_MACHINE_IA64:
1110 case IMAGE_FILE_MACHINE_I386:
1116 case IMAGE_FILE_MACHINE_M68K:
1122 case IMAGE_FILE_MACHINE_R3000:
1123 case IMAGE_FILE_MACHINE_R4000:
1124 case IMAGE_FILE_MACHINE_R10000:
1126 case IMAGE_FILE_MACHINE_MIPS16:
1127 case IMAGE_FILE_MACHINE_MIPSFPU:
1128 case IMAGE_FILE_MACHINE_MIPSFPU16:
1129 #ifdef MIPS_ARCH_MAGIC_WINCE
1130 magic = MIPS_ARCH_MAGIC_WINCE;
1134 case IMAGE_FILE_MACHINE_SH3:
1135 case IMAGE_FILE_MACHINE_SH4:
1136 #ifdef SH_ARCH_MAGIC_WINCE
1137 magic = SH_ARCH_MAGIC_WINCE;
1141 case IMAGE_FILE_MACHINE_ARM:
1147 case IMAGE_FILE_MACHINE_THUMB:
1150 extern const bfd_target TARGET_LITTLE_SYM;
1152 if (abfd->xvec == & TARGET_LITTLE_SYM)
1153 magic = THUMBPEMAGIC;
1158 case IMAGE_FILE_MACHINE_POWERPC:
1159 /* We no longer support PowerPC. */
1163 _("%s: Unrecognised machine type (0x%x) in Import Library Format archive"),
1164 bfd_archive_filename (abfd), machine);
1165 bfd_set_error (bfd_error_malformed_archive);
1175 _("%s: Recognised but unhandled machine type (0x%x) in Import Library Format archive"),
1176 bfd_archive_filename (abfd), machine);
1177 bfd_set_error (bfd_error_wrong_format);
1182 /* We do not bother to check the date.
1183 date = H_GET_32 (abfd, ptr); */
1186 size = H_GET_32 (abfd, ptr);
1192 (_("%s: size field is zero in Import Library Format header"),
1193 bfd_archive_filename (abfd));
1194 bfd_set_error (bfd_error_malformed_archive);
1199 ordinal = H_GET_16 (abfd, ptr);
1202 types = H_GET_16 (abfd, ptr);
1205 /* Now read in the two strings that follow. */
1206 ptr = bfd_alloc (abfd, size);
1210 if (bfd_bread (ptr, size, abfd) != size)
1212 bfd_release (abfd, ptr);
1217 source_dll = ptr + strlen (ptr) + 1;
1219 /* Verify that the strings are null terminated. */
1220 if (ptr[size - 1] != 0 || ((unsigned long) (source_dll - ptr) >= size))
1223 (_("%s: string not null terminated in ILF object file."),
1224 bfd_archive_filename (abfd));
1225 bfd_set_error (bfd_error_malformed_archive);
1226 bfd_release (abfd, ptr);
1230 /* Now construct the bfd. */
1231 if (! pe_ILF_build_a_bfd (abfd, magic, symbol_name,
1232 source_dll, ordinal, types))
1234 bfd_release (abfd, ptr);
1241 static const bfd_target *
1242 pe_bfd_object_p (bfd * abfd)
1245 struct external_PEI_DOS_hdr dos_hdr;
1246 struct external_PEI_IMAGE_hdr image_hdr;
1249 /* Detect if this a Microsoft Import Library Format element. */
1250 if (bfd_seek (abfd, (file_ptr) 0, SEEK_SET) != 0
1251 || bfd_bread (buffer, (bfd_size_type) 4, abfd) != 4)
1253 if (bfd_get_error () != bfd_error_system_call)
1254 bfd_set_error (bfd_error_wrong_format);
1258 if (H_GET_32 (abfd, buffer) == 0xffff0000)
1259 return pe_ILF_object_p (abfd);
1261 if (bfd_seek (abfd, (file_ptr) 0, SEEK_SET) != 0
1262 || bfd_bread (&dos_hdr, (bfd_size_type) sizeof (dos_hdr), abfd)
1263 != sizeof (dos_hdr))
1265 if (bfd_get_error () != bfd_error_system_call)
1266 bfd_set_error (bfd_error_wrong_format);
1270 /* There are really two magic numbers involved; the magic number
1271 that says this is a NT executable (PEI) and the magic number that
1272 determines the architecture. The former is DOSMAGIC, stored in
1273 the e_magic field. The latter is stored in the f_magic field.
1274 If the NT magic number isn't valid, the architecture magic number
1275 could be mimicked by some other field (specifically, the number
1276 of relocs in section 3). Since this routine can only be called
1277 correctly for a PEI file, check the e_magic number here, and, if
1278 it doesn't match, clobber the f_magic number so that we don't get
1280 if (H_GET_16 (abfd, dos_hdr.e_magic) != DOSMAGIC)
1282 bfd_set_error (bfd_error_wrong_format);
1286 offset = H_GET_32 (abfd, dos_hdr.e_lfanew);
1287 if (bfd_seek (abfd, offset, SEEK_SET) != 0
1288 || (bfd_bread (&image_hdr, (bfd_size_type) sizeof (image_hdr), abfd)
1289 != sizeof (image_hdr)))
1291 if (bfd_get_error () != bfd_error_system_call)
1292 bfd_set_error (bfd_error_wrong_format);
1296 if (H_GET_32 (abfd, image_hdr.nt_signature) != 0x4550)
1298 bfd_set_error (bfd_error_wrong_format);
1302 /* Here is the hack. coff_object_p wants to read filhsz bytes to
1303 pick up the COFF header for PE, see "struct external_PEI_filehdr"
1304 in include/coff/pe.h. We adjust so that that will work. */
1305 if (bfd_seek (abfd, (file_ptr) (offset - sizeof (dos_hdr)), SEEK_SET) != 0)
1307 if (bfd_get_error () != bfd_error_system_call)
1308 bfd_set_error (bfd_error_wrong_format);
1312 return coff_object_p (abfd);
1315 #define coff_object_p pe_bfd_object_p
1316 #endif /* COFF_IMAGE_WITH_PE */