| /* Support for the generic parts of PE/PEI, for BFD. |
| Copyright 1995, 1996, 1997, 1998, 1999, 2000, 2001 |
| Free Software Foundation, Inc. |
| Written by Cygnus Solutions. |
| |
| This file is part of BFD, the Binary File Descriptor library. |
| |
| This program is free software; you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 2 of the License, or |
| (at your option) any later version. |
| |
| This program is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| GNU General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with this program; if not, write to the Free Software |
| Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ |
| |
| /* |
| Most of this hacked by Steve Chamberlain, |
| sac@cygnus.com |
| |
| PE/PEI rearrangement (and code added): Donn Terry |
| Softway Systems, Inc. |
| */ |
| |
| /* Hey look, some documentation [and in a place you expect to find it]! |
| |
| The main reference for the pei format is "Microsoft Portable Executable |
| and Common Object File Format Specification 4.1". Get it if you need to |
| do some serious hacking on this code. |
| |
| Another reference: |
| "Peering Inside the PE: A Tour of the Win32 Portable Executable |
| File Format", MSJ 1994, Volume 9. |
| |
| The *sole* difference between the pe format and the pei format is that the |
| latter has an MSDOS 2.0 .exe header on the front that prints the message |
| "This app must be run under Windows." (or some such). |
| (FIXME: Whether that statement is *really* true or not is unknown. |
| Are there more subtle differences between pe and pei formats? |
| For now assume there aren't. If you find one, then for God sakes |
| document it here!) |
| |
| The Microsoft docs use the word "image" instead of "executable" because |
| the former can also refer to a DLL (shared library). Confusion can arise |
| because the `i' in `pei' also refers to "image". The `pe' format can |
| also create images (i.e. executables), it's just that to run on a win32 |
| system you need to use the pei format. |
| |
| FIXME: Please add more docs here so the next poor fool that has to hack |
| on this code has a chance of getting something accomplished without |
| wasting too much time. |
| */ |
| |
| #include "libpei.h" |
| |
| static boolean (*pe_saved_coff_bfd_print_private_bfd_data) |
| PARAMS ((bfd *, PTR)) = |
| #ifndef coff_bfd_print_private_bfd_data |
| NULL; |
| #else |
| coff_bfd_print_private_bfd_data; |
| #undef coff_bfd_print_private_bfd_data |
| #endif |
| |
| static boolean pe_print_private_bfd_data PARAMS ((bfd *, PTR)); |
| #define coff_bfd_print_private_bfd_data pe_print_private_bfd_data |
| |
| static boolean (*pe_saved_coff_bfd_copy_private_bfd_data) |
| PARAMS ((bfd *, bfd *)) = |
| #ifndef coff_bfd_copy_private_bfd_data |
| NULL; |
| #else |
| coff_bfd_copy_private_bfd_data; |
| #undef coff_bfd_copy_private_bfd_data |
| #endif |
| |
| static boolean pe_bfd_copy_private_bfd_data PARAMS ((bfd *, bfd *)); |
| #define coff_bfd_copy_private_bfd_data pe_bfd_copy_private_bfd_data |
| |
| #define coff_mkobject pe_mkobject |
| #define coff_mkobject_hook pe_mkobject_hook |
| |
| #ifndef NO_COFF_RELOCS |
| static void coff_swap_reloc_in PARAMS ((bfd *, PTR, PTR)); |
| static unsigned int coff_swap_reloc_out PARAMS ((bfd *, PTR, PTR)); |
| #endif |
| static void coff_swap_filehdr_in PARAMS ((bfd *, PTR, PTR)); |
| static void coff_swap_scnhdr_in PARAMS ((bfd *, PTR, PTR)); |
| static boolean pe_mkobject PARAMS ((bfd *)); |
| static PTR pe_mkobject_hook PARAMS ((bfd *, PTR, PTR)); |
| |
| #ifdef COFF_IMAGE_WITH_PE |
| /* This structure contains static variables used by the ILF code. */ |
| typedef asection * asection_ptr; |
| |
| typedef struct |
| { |
| bfd * abfd; |
| bfd_byte * data; |
| struct bfd_in_memory * bim; |
| unsigned short magic; |
| |
| arelent * reltab; |
| unsigned int relcount; |
| |
| coff_symbol_type * sym_cache; |
| coff_symbol_type * sym_ptr; |
| unsigned int sym_index; |
| |
| unsigned int * sym_table; |
| unsigned int * table_ptr; |
| |
| combined_entry_type * native_syms; |
| combined_entry_type * native_ptr; |
| |
| coff_symbol_type ** sym_ptr_table; |
| coff_symbol_type ** sym_ptr_ptr; |
| |
| unsigned int sec_index; |
| |
| char * string_table; |
| char * string_ptr; |
| char * end_string_ptr; |
| |
| SYMENT * esym_table; |
| SYMENT * esym_ptr; |
| |
| struct internal_reloc * int_reltab; |
| } |
| pe_ILF_vars; |
| |
| static asection_ptr pe_ILF_make_a_section PARAMS ((pe_ILF_vars *, const char *, unsigned int, flagword)); |
| static void pe_ILF_make_a_reloc PARAMS ((pe_ILF_vars *, bfd_vma, bfd_reloc_code_real_type, asection_ptr)); |
| static void pe_ILF_make_a_symbol PARAMS ((pe_ILF_vars *, const char *, const char *, asection_ptr, flagword)); |
| static void pe_ILF_save_relocs PARAMS ((pe_ILF_vars *, asection_ptr)); |
| 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)); |
| static boolean pe_ILF_build_a_bfd PARAMS ((bfd *, unsigned int, bfd_byte *, bfd_byte *, unsigned int, unsigned int)); |
| static const bfd_target * pe_ILF_object_p PARAMS ((bfd *)); |
| static const bfd_target * pe_bfd_object_p PARAMS ((bfd *)); |
| #endif /* COFF_IMAGE_WITH_PE */ |
| |
| /**********************************************************************/ |
| |
| #ifndef NO_COFF_RELOCS |
| static void |
| coff_swap_reloc_in (abfd, src, dst) |
| bfd *abfd; |
| PTR src; |
| PTR dst; |
| { |
| RELOC *reloc_src = (RELOC *) src; |
| struct internal_reloc *reloc_dst = (struct internal_reloc *) dst; |
| |
| reloc_dst->r_vaddr = H_GET_32 (abfd, reloc_src->r_vaddr); |
| reloc_dst->r_symndx = H_GET_S32 (abfd, reloc_src->r_symndx); |
| |
| reloc_dst->r_type = H_GET_16 (abfd, reloc_src->r_type); |
| |
| #ifdef SWAP_IN_RELOC_OFFSET |
| reloc_dst->r_offset = SWAP_IN_RELOC_OFFSET (abfd, reloc_src->r_offset); |
| #endif |
| } |
| |
| static unsigned int |
| coff_swap_reloc_out (abfd, src, dst) |
| bfd *abfd; |
| PTR src; |
| PTR dst; |
| { |
| struct internal_reloc *reloc_src = (struct internal_reloc *)src; |
| struct external_reloc *reloc_dst = (struct external_reloc *)dst; |
| H_PUT_32 (abfd, reloc_src->r_vaddr, reloc_dst->r_vaddr); |
| H_PUT_32 (abfd, reloc_src->r_symndx, reloc_dst->r_symndx); |
| |
| H_PUT_16 (abfd, reloc_src->r_type, reloc_dst->r_type); |
| |
| #ifdef SWAP_OUT_RELOC_OFFSET |
| SWAP_OUT_RELOC_OFFSET (abfd, reloc_src->r_offset, reloc_dst->r_offset); |
| #endif |
| #ifdef SWAP_OUT_RELOC_EXTRA |
| SWAP_OUT_RELOC_EXTRA(abfd, reloc_src, reloc_dst); |
| #endif |
| return RELSZ; |
| } |
| #endif /* not NO_COFF_RELOCS */ |
| |
| static void |
| coff_swap_filehdr_in (abfd, src, dst) |
| bfd *abfd; |
| PTR src; |
| PTR dst; |
| { |
| FILHDR *filehdr_src = (FILHDR *) src; |
| struct internal_filehdr *filehdr_dst = (struct internal_filehdr *) dst; |
| filehdr_dst->f_magic = H_GET_16 (abfd, filehdr_src->f_magic); |
| filehdr_dst->f_nscns = H_GET_16 (abfd, filehdr_src-> f_nscns); |
| filehdr_dst->f_timdat = H_GET_32 (abfd, filehdr_src-> f_timdat); |
| |
| filehdr_dst->f_nsyms = H_GET_32 (abfd, filehdr_src-> f_nsyms); |
| filehdr_dst->f_flags = H_GET_16 (abfd, filehdr_src-> f_flags); |
| filehdr_dst->f_symptr = H_GET_32 (abfd, filehdr_src->f_symptr); |
| |
| /* Other people's tools sometimes generate headers with an nsyms but |
| a zero symptr. */ |
| if (filehdr_dst->f_nsyms != 0 && filehdr_dst->f_symptr == 0) |
| { |
| filehdr_dst->f_nsyms = 0; |
| filehdr_dst->f_flags |= F_LSYMS; |
| } |
| |
| filehdr_dst->f_opthdr = H_GET_16 (abfd, filehdr_src-> f_opthdr); |
| } |
| |
| #ifdef COFF_IMAGE_WITH_PE |
| # define coff_swap_filehdr_out _bfd_XXi_only_swap_filehdr_out |
| #else |
| # define coff_swap_filehdr_out _bfd_pe_only_swap_filehdr_out |
| #endif |
| |
| static void |
| coff_swap_scnhdr_in (abfd, ext, in) |
| bfd *abfd; |
| PTR ext; |
| PTR in; |
| { |
| SCNHDR *scnhdr_ext = (SCNHDR *) ext; |
| struct internal_scnhdr *scnhdr_int = (struct internal_scnhdr *) in; |
| |
| memcpy(scnhdr_int->s_name, scnhdr_ext->s_name, sizeof (scnhdr_int->s_name)); |
| scnhdr_int->s_vaddr = GET_SCNHDR_VADDR (abfd, scnhdr_ext->s_vaddr); |
| scnhdr_int->s_paddr = GET_SCNHDR_PADDR (abfd, scnhdr_ext->s_paddr); |
| scnhdr_int->s_size = GET_SCNHDR_SIZE (abfd, scnhdr_ext->s_size); |
| scnhdr_int->s_scnptr = GET_SCNHDR_SCNPTR (abfd, scnhdr_ext->s_scnptr); |
| scnhdr_int->s_relptr = GET_SCNHDR_RELPTR (abfd, scnhdr_ext->s_relptr); |
| scnhdr_int->s_lnnoptr = GET_SCNHDR_LNNOPTR (abfd, scnhdr_ext->s_lnnoptr); |
| scnhdr_int->s_flags = H_GET_32 (abfd, scnhdr_ext->s_flags); |
| |
| /* MS handles overflow of line numbers by carrying into the reloc |
| field (it appears). Since it's supposed to be zero for PE |
| *IMAGE* format, that's safe. This is still a bit iffy. */ |
| #ifdef COFF_IMAGE_WITH_PE |
| scnhdr_int->s_nlnno = (H_GET_16 (abfd, scnhdr_ext->s_nlnno) |
| + (H_GET_16 (abfd, scnhdr_ext->s_nreloc) << 16)); |
| scnhdr_int->s_nreloc = 0; |
| #else |
| scnhdr_int->s_nreloc = H_GET_16 (abfd, scnhdr_ext->s_nreloc); |
| scnhdr_int->s_nlnno = H_GET_16 (abfd, scnhdr_ext->s_nlnno); |
| #endif |
| |
| if (scnhdr_int->s_vaddr != 0) |
| { |
| scnhdr_int->s_vaddr += pe_data (abfd)->pe_opthdr.ImageBase; |
| scnhdr_int->s_vaddr &= 0xffffffff; |
| } |
| |
| #ifndef COFF_NO_HACK_SCNHDR_SIZE |
| /* If this section holds uninitialized data, use the virtual size |
| (stored in s_paddr) instead of the physical size. */ |
| if ((scnhdr_int->s_flags & IMAGE_SCN_CNT_UNINITIALIZED_DATA) != 0 |
| && (scnhdr_int->s_paddr > 0)) |
| { |
| scnhdr_int->s_size = scnhdr_int->s_paddr; |
| /* This code used to set scnhdr_int->s_paddr to 0. However, |
| coff_set_alignment_hook stores s_paddr in virt_size, which |
| only works if it correctly holds the virtual size of the |
| section. */ |
| } |
| #endif |
| } |
| |
| static boolean |
| pe_mkobject (abfd) |
| bfd * abfd; |
| { |
| pe_data_type *pe; |
| bfd_size_type amt = sizeof (pe_data_type); |
| |
| abfd->tdata.pe_obj_data = (struct pe_tdata *) bfd_zalloc (abfd, amt); |
| |
| if (abfd->tdata.pe_obj_data == 0) |
| return false; |
| |
| pe = pe_data (abfd); |
| |
| pe->coff.pe = 1; |
| |
| /* in_reloc_p is architecture dependent. */ |
| pe->in_reloc_p = in_reloc_p; |
| |
| #ifdef PEI_FORCE_MINIMUM_ALIGNMENT |
| pe->force_minimum_alignment = 1; |
| #endif |
| #ifdef PEI_TARGET_SUBSYSTEM |
| pe->target_subsystem = PEI_TARGET_SUBSYSTEM; |
| #endif |
| |
| return true; |
| } |
| |
| /* Create the COFF backend specific information. */ |
| static PTR |
| pe_mkobject_hook (abfd, filehdr, aouthdr) |
| bfd * abfd; |
| PTR filehdr; |
| PTR aouthdr ATTRIBUTE_UNUSED; |
| { |
| struct internal_filehdr *internal_f = (struct internal_filehdr *) filehdr; |
| pe_data_type *pe; |
| |
| if (pe_mkobject (abfd) == false) |
| return NULL; |
| |
| pe = pe_data (abfd); |
| pe->coff.sym_filepos = internal_f->f_symptr; |
| /* These members communicate important constants about the symbol |
| table to GDB's symbol-reading code. These `constants' |
| unfortunately vary among coff implementations... */ |
| pe->coff.local_n_btmask = N_BTMASK; |
| pe->coff.local_n_btshft = N_BTSHFT; |
| pe->coff.local_n_tmask = N_TMASK; |
| pe->coff.local_n_tshift = N_TSHIFT; |
| pe->coff.local_symesz = SYMESZ; |
| pe->coff.local_auxesz = AUXESZ; |
| pe->coff.local_linesz = LINESZ; |
| |
| pe->coff.timestamp = internal_f->f_timdat; |
| |
| obj_raw_syment_count (abfd) = |
| obj_conv_table_size (abfd) = |
| internal_f->f_nsyms; |
| |
| pe->real_flags = internal_f->f_flags; |
| |
| if ((internal_f->f_flags & F_DLL) != 0) |
| pe->dll = 1; |
| |
| if ((internal_f->f_flags & IMAGE_FILE_DEBUG_STRIPPED) == 0) |
| abfd->flags |= HAS_DEBUG; |
| |
| #ifdef COFF_IMAGE_WITH_PE |
| if (aouthdr) |
| pe->pe_opthdr = ((struct internal_aouthdr *)aouthdr)->pe; |
| #endif |
| |
| #ifdef ARM |
| if (! _bfd_coff_arm_set_private_flags (abfd, internal_f->f_flags)) |
| coff_data (abfd) ->flags = 0; |
| #endif |
| |
| return (PTR) pe; |
| } |
| |
| static boolean |
| pe_print_private_bfd_data (abfd, vfile) |
| bfd *abfd; |
| PTR vfile; |
| { |
| FILE *file = (FILE *) vfile; |
| |
| if (!_bfd_XX_print_private_bfd_data_common (abfd, vfile)) |
| return false; |
| |
| if (pe_saved_coff_bfd_print_private_bfd_data != NULL) |
| { |
| fputc ('\n', file); |
| |
| return pe_saved_coff_bfd_print_private_bfd_data (abfd, vfile); |
| } |
| |
| return true; |
| } |
| |
| /* Copy any private info we understand from the input bfd |
| to the output bfd. */ |
| |
| static boolean |
| pe_bfd_copy_private_bfd_data (ibfd, obfd) |
| bfd *ibfd, *obfd; |
| { |
| if (!_bfd_XX_bfd_copy_private_bfd_data_common (ibfd, obfd)) |
| return false; |
| |
| if (pe_saved_coff_bfd_copy_private_bfd_data) |
| return pe_saved_coff_bfd_copy_private_bfd_data (ibfd, obfd); |
| |
| return true; |
| } |
| |
| #define coff_bfd_copy_private_section_data \ |
| _bfd_XX_bfd_copy_private_section_data |
| |
| #define coff_get_symbol_info _bfd_XX_get_symbol_info |
| |
| #ifdef COFF_IMAGE_WITH_PE |
| |
| /* Code to handle Microsoft's Image Library Format. |
| Also known as LINK6 format. |
| Documentation about this format can be found at: |
| |
| http://msdn.microsoft.com/library/specs/pecoff_section8.htm */ |
| |
| /* The following constants specify the sizes of the various data |
| structures that we have to create in order to build a bfd describing |
| an ILF object file. The final "+ 1" in the definitions of SIZEOF_IDATA6 |
| and SIZEOF_IDATA7 below is to allow for the possibility that we might |
| need a padding byte in order to ensure 16 bit alignment for the section's |
| contents. |
| |
| The value for SIZEOF_ILF_STRINGS is computed as follows: |
| |
| There will be NUM_ILF_SECTIONS section symbols. Allow 9 characters |
| per symbol for their names (longest section name is .idata$x). |
| |
| There will be two symbols for the imported value, one the symbol name |
| and one with _imp__ prefixed. Allowing for the terminating nul's this |
| is strlen (symbol_name) * 2 + 8 + 21 + strlen (source_dll). |
| |
| The strings in the string table must start STRING__SIZE_SIZE bytes into |
| the table in order to for the string lookup code in coffgen/coffcode to |
| work. */ |
| #define NUM_ILF_RELOCS 8 |
| #define NUM_ILF_SECTIONS 6 |
| #define NUM_ILF_SYMS (2 + NUM_ILF_SECTIONS) |
| |
| #define SIZEOF_ILF_SYMS (NUM_ILF_SYMS * sizeof (* vars.sym_cache)) |
| #define SIZEOF_ILF_SYM_TABLE (NUM_ILF_SYMS * sizeof (* vars.sym_table)) |
| #define SIZEOF_ILF_NATIVE_SYMS (NUM_ILF_SYMS * sizeof (* vars.native_syms)) |
| #define SIZEOF_ILF_SYM_PTR_TABLE (NUM_ILF_SYMS * sizeof (* vars.sym_ptr_table)) |
| #define SIZEOF_ILF_EXT_SYMS (NUM_ILF_SYMS * sizeof (* vars.esym_table)) |
| #define SIZEOF_ILF_RELOCS (NUM_ILF_RELOCS * sizeof (* vars.reltab)) |
| #define SIZEOF_ILF_INT_RELOCS (NUM_ILF_RELOCS * sizeof (* vars.int_reltab)) |
| #define SIZEOF_ILF_STRINGS (strlen (symbol_name) * 2 + 8 \ |
| + 21 + strlen (source_dll) \ |
| + NUM_ILF_SECTIONS * 9 \ |
| + STRING_SIZE_SIZE) |
| #define SIZEOF_IDATA2 (5 * 4) |
| #define SIZEOF_IDATA4 (1 * 4) |
| #define SIZEOF_IDATA5 (1 * 4) |
| #define SIZEOF_IDATA6 (2 + strlen (symbol_name) + 1 + 1) |
| #define SIZEOF_IDATA7 (strlen (source_dll) + 1 + 1) |
| #define SIZEOF_ILF_SECTIONS (NUM_ILF_SECTIONS * sizeof (struct coff_section_tdata)) |
| |
| #define ILF_DATA_SIZE \ |
| sizeof (* vars.bim) \ |
| + SIZEOF_ILF_SYMS \ |
| + SIZEOF_ILF_SYM_TABLE \ |
| + SIZEOF_ILF_NATIVE_SYMS \ |
| + SIZEOF_ILF_SYM_PTR_TABLE \ |
| + SIZEOF_ILF_EXT_SYMS \ |
| + SIZEOF_ILF_RELOCS \ |
| + SIZEOF_ILF_INT_RELOCS \ |
| + SIZEOF_ILF_STRINGS \ |
| + SIZEOF_IDATA2 \ |
| + SIZEOF_IDATA4 \ |
| + SIZEOF_IDATA5 \ |
| + SIZEOF_IDATA6 \ |
| + SIZEOF_IDATA7 \ |
| + SIZEOF_ILF_SECTIONS \ |
| + MAX_TEXT_SECTION_SIZE |
| |
| /* Create an empty relocation against the given symbol. */ |
| static void |
| pe_ILF_make_a_symbol_reloc (pe_ILF_vars * vars, |
| bfd_vma address, |
| bfd_reloc_code_real_type reloc, |
| struct symbol_cache_entry ** sym, |
| unsigned int sym_index) |
| { |
| arelent * entry; |
| struct internal_reloc * internal; |
| |
| entry = vars->reltab + vars->relcount; |
| internal = vars->int_reltab + vars->relcount; |
| |
| entry->address = address; |
| entry->addend = 0; |
| entry->howto = bfd_reloc_type_lookup (vars->abfd, reloc); |
| entry->sym_ptr_ptr = sym; |
| |
| internal->r_vaddr = address; |
| internal->r_symndx = sym_index; |
| internal->r_type = entry->howto->type; |
| #if 0 /* These fields do not need to be initialised. */ |
| internal->r_size = 0; |
| internal->r_extern = 0; |
| internal->r_offset = 0; |
| #endif |
| |
| vars->relcount ++; |
| |
| BFD_ASSERT (vars->relcount <= NUM_ILF_RELOCS); |
| } |
| |
| /* Create an empty relocation against the given section. */ |
| static void |
| pe_ILF_make_a_reloc (pe_ILF_vars * vars, |
| bfd_vma address, |
| bfd_reloc_code_real_type reloc, |
| asection_ptr sec) |
| { |
| pe_ILF_make_a_symbol_reloc (vars, address, reloc, sec->symbol_ptr_ptr, |
| coff_section_data (vars->abfd, sec)->i); |
| } |
| |
| /* Move the queued relocs into the given section. */ |
| static void |
| pe_ILF_save_relocs (pe_ILF_vars * vars, |
| asection_ptr sec) |
| { |
| /* Make sure that there is somewhere to store the internal relocs. */ |
| if (coff_section_data (vars->abfd, sec) == NULL) |
| /* We should probably return an error indication here. */ |
| abort (); |
| |
| coff_section_data (vars->abfd, sec)->relocs = vars->int_reltab; |
| coff_section_data (vars->abfd, sec)->keep_relocs = true; |
| |
| sec->relocation = vars->reltab; |
| sec->reloc_count = vars->relcount; |
| sec->flags |= SEC_RELOC; |
| |
| vars->reltab += vars->relcount; |
| vars->int_reltab += vars->relcount; |
| vars->relcount = 0; |
| |
| BFD_ASSERT ((bfd_byte *) vars->int_reltab < (bfd_byte *) vars->string_table); |
| } |
| |
| /* Create a global symbol and add it to the relevant tables. */ |
| static void |
| pe_ILF_make_a_symbol (pe_ILF_vars * vars, |
| const char * prefix, |
| const char * symbol_name, |
| asection_ptr section, |
| flagword extra_flags) |
| { |
| coff_symbol_type * sym; |
| combined_entry_type * ent; |
| SYMENT * esym; |
| unsigned short sclass; |
| |
| if (extra_flags & BSF_LOCAL) |
| sclass = C_STAT; |
| else |
| sclass = C_EXT; |
| |
| #ifdef THUMBPEMAGIC |
| if (vars->magic == THUMBPEMAGIC) |
| { |
| if (extra_flags & BSF_FUNCTION) |
| sclass = C_THUMBEXTFUNC; |
| else if (extra_flags & BSF_LOCAL) |
| sclass = C_THUMBSTAT; |
| else |
| sclass = C_THUMBEXT; |
| } |
| #endif |
| |
| BFD_ASSERT (vars->sym_index < NUM_ILF_SYMS); |
| |
| sym = vars->sym_ptr; |
| ent = vars->native_ptr; |
| esym = vars->esym_ptr; |
| |
| /* Copy the symbol's name into the string table. */ |
| sprintf (vars->string_ptr, "%s%s", prefix, symbol_name); |
| |
| if (section == NULL) |
| section = (asection_ptr) & bfd_und_section; |
| |
| /* Initialise the external symbol. */ |
| H_PUT_32 (vars->abfd, vars->string_ptr - vars->string_table, |
| esym->e.e.e_offset); |
| H_PUT_16 (vars->abfd, section->target_index, esym->e_scnum); |
| esym->e_sclass[0] = sclass; |
| |
| /* The following initialisations are unnecessary - the memory is |
| zero initialised. They are just kept here as reminders. */ |
| #if 0 |
| esym->e.e.e_zeroes = 0; |
| esym->e_value = 0; |
| esym->e_type = T_NULL; |
| esym->e_numaux = 0; |
| #endif |
| |
| /* Initialise the internal symbol structure. */ |
| ent->u.syment.n_sclass = sclass; |
| ent->u.syment.n_scnum = section->target_index; |
| ent->u.syment._n._n_n._n_offset = (long) sym; |
| |
| #if 0 /* See comment above. */ |
| ent->u.syment.n_value = 0; |
| ent->u.syment.n_flags = 0; |
| ent->u.syment.n_type = T_NULL; |
| ent->u.syment.n_numaux = 0; |
| ent->fix_value = 0; |
| #endif |
| |
| sym->symbol.the_bfd = vars->abfd; |
| sym->symbol.name = vars->string_ptr; |
| sym->symbol.flags = BSF_EXPORT | BSF_GLOBAL | extra_flags; |
| sym->symbol.section = section; |
| sym->native = ent; |
| |
| #if 0 /* See comment above. */ |
| sym->symbol.value = 0; |
| sym->symbol.udata.i = 0; |
| sym->done_lineno = false; |
| sym->lineno = NULL; |
| #endif |
| |
| * vars->table_ptr = vars->sym_index; |
| * vars->sym_ptr_ptr = sym; |
| |
| /* Adjust pointers for the next symbol. */ |
| vars->sym_index ++; |
| vars->sym_ptr ++; |
| vars->sym_ptr_ptr ++; |
| vars->table_ptr ++; |
| vars->native_ptr ++; |
| vars->esym_ptr ++; |
| vars->string_ptr += strlen (symbol_name) + strlen (prefix) + 1; |
| |
| BFD_ASSERT (vars->string_ptr < vars->end_string_ptr); |
| } |
| |
| /* Create a section. */ |
| static asection_ptr |
| pe_ILF_make_a_section (pe_ILF_vars * vars, |
| const char * name, |
| unsigned int size, |
| flagword extra_flags) |
| { |
| asection_ptr sec; |
| flagword flags; |
| |
| sec = bfd_make_section_old_way (vars->abfd, name); |
| if (sec == NULL) |
| return NULL; |
| |
| flags = SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_KEEP | SEC_IN_MEMORY; |
| |
| bfd_set_section_flags (vars->abfd, sec, flags | extra_flags); |
| |
| bfd_set_section_alignment (vars->abfd, sec, 2); |
| |
| /* Check that we will not run out of space. */ |
| BFD_ASSERT (vars->data + size < vars->bim->buffer + vars->bim->size); |
| |
| /* Set the section size and contents. The actual |
| contents are filled in by our parent. */ |
| bfd_set_section_size (vars->abfd, sec, (bfd_size_type) size); |
| sec->contents = vars->data; |
| sec->target_index = vars->sec_index ++; |
| |
| /* Advance data pointer in the vars structure. */ |
| vars->data += size; |
| |
| /* Skip the padding byte if it was not needed. |
| The logic here is that if the string length is odd, |
| then the entire string length, including the null byte, |
| is even and so the extra, padding byte, is not needed. */ |
| if (size & 1) |
| vars->data --; |
| |
| /* Create a coff_section_tdata structure for our use. */ |
| sec->used_by_bfd = (struct coff_section_tdata *) vars->data; |
| vars->data += sizeof (struct coff_section_tdata); |
| |
| BFD_ASSERT (vars->data <= vars->bim->buffer + vars->bim->size); |
| |
| /* Create a symbol to refer to this section. */ |
| pe_ILF_make_a_symbol (vars, "", name, sec, BSF_LOCAL); |
| |
| /* Cache the index to the symbol in the coff_section_data structure. */ |
| coff_section_data (vars->abfd, sec)->i = vars->sym_index - 1; |
| |
| return sec; |
| } |
| |
| /* This structure contains the code that goes into the .text section |
| in order to perform a jump into the DLL lookup table. The entries |
| in the table are index by the magic number used to represent the |
| machine type in the PE file. The contents of the data[] arrays in |
| these entries are stolen from the jtab[] arrays in ld/pe-dll.c. |
| The SIZE field says how many bytes in the DATA array are actually |
| used. The OFFSET field says where in the data array the address |
| of the .idata$5 section should be placed. */ |
| #define MAX_TEXT_SECTION_SIZE 32 |
| |
| typedef struct |
| { |
| unsigned short magic; |
| unsigned char data[MAX_TEXT_SECTION_SIZE]; |
| unsigned int size; |
| unsigned int offset; |
| } |
| jump_table; |
| |
| static jump_table jtab[] = |
| { |
| #ifdef I386MAGIC |
| { I386MAGIC, |
| { 0xff, 0x25, 0x00, 0x00, 0x00, 0x00, 0x90, 0x90 }, |
| 8, 2 |
| }, |
| #endif |
| |
| #ifdef MC68MAGIC |
| { MC68MAGIC, { /* XXX fill me in */ }, 0, 0 }, |
| #endif |
| #ifdef MIPS_ARCH_MAGIC_WINCE |
| { MIPS_ARCH_MAGIC_WINCE, |
| { 0x00, 0x00, 0x08, 0x3c, 0x00, 0x00, 0x08, 0x8d, |
| 0x08, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00 }, |
| 16, 0 |
| }, |
| #endif |
| |
| #ifdef SH_ARCH_MAGIC_WINCE |
| { SH_ARCH_MAGIC_WINCE, |
| { 0x01, 0xd0, 0x02, 0x60, 0x2b, 0x40, |
| 0x09, 0x00, 0x00, 0x00, 0x00, 0x00 }, |
| 12, 8 |
| }, |
| #endif |
| |
| #ifdef ARMPEMAGIC |
| { ARMPEMAGIC, |
| { 0x00, 0xc0, 0x9f, 0xe5, 0x00, 0xf0, |
| 0x9c, 0xe5, 0x00, 0x00, 0x00, 0x00}, |
| 12, 8 |
| }, |
| #endif |
| |
| #ifdef THUMBPEMAGIC |
| { THUMBPEMAGIC, |
| { 0x40, 0xb4, 0x02, 0x4e, 0x36, 0x68, 0xb4, 0x46, |
| 0x40, 0xbc, 0x60, 0x47, 0x00, 0x00, 0x00, 0x00 }, |
| 16, 12 |
| }, |
| #endif |
| { 0, { 0 }, 0, 0 } |
| }; |
| |
| #ifndef NUM_ENTRIES |
| #define NUM_ENTRIES(a) (sizeof (a) / sizeof (a)[0]) |
| #endif |
| |
| /* Build a full BFD from the information supplied in a ILF object. */ |
| static boolean |
| pe_ILF_build_a_bfd (bfd * abfd, |
| unsigned int magic, |
| bfd_byte * symbol_name, |
| bfd_byte * source_dll, |
| unsigned int ordinal, |
| unsigned int types) |
| { |
| bfd_byte * ptr; |
| pe_ILF_vars vars; |
| struct internal_filehdr internal_f; |
| unsigned int import_type; |
| unsigned int import_name_type; |
| asection_ptr id4, id5, id6 = NULL, text = NULL; |
| coff_symbol_type ** imp_sym; |
| unsigned int imp_index; |
| |
| /* Decode and verify the types field of the ILF structure. */ |
| import_type = types & 0x3; |
| import_name_type = (types & 0x1c) >> 2; |
| |
| switch (import_type) |
| { |
| case IMPORT_CODE: |
| case IMPORT_DATA: |
| break; |
| |
| case IMPORT_CONST: |
| /* XXX code yet to be written. */ |
| _bfd_error_handler (_("%s: Unhandled import type; %x"), |
| bfd_archive_filename (abfd), import_type); |
| return false; |
| |
| default: |
| _bfd_error_handler (_("%s: Unrecognised import type; %x"), |
| bfd_archive_filename (abfd), import_type); |
| return false; |
| } |
| |
| switch (import_name_type) |
| { |
| case IMPORT_ORDINAL: |
| case IMPORT_NAME: |
| case IMPORT_NAME_NOPREFIX: |
| case IMPORT_NAME_UNDECORATE: |
| break; |
| |
| default: |
| _bfd_error_handler (_("%s: Unrecognised import name type; %x"), |
| bfd_archive_filename (abfd), import_name_type); |
| return false; |
| } |
| |
| /* Initialise local variables. |
| |
| Note these are kept in a structure rather than being |
| declared as statics since bfd frowns on global variables. |
| |
| We are going to construct the contents of the BFD in memory, |
| so allocate all the space that we will need right now. */ |
| ptr = bfd_zalloc (abfd, (bfd_size_type) ILF_DATA_SIZE); |
| if (ptr == NULL) |
| return false; |
| |
| /* Create a bfd_in_memory structure. */ |
| vars.bim = (struct bfd_in_memory *) ptr; |
| vars.bim->buffer = ptr; |
| vars.bim->size = ILF_DATA_SIZE; |
| ptr += sizeof (* vars.bim); |
| |
| /* Initialise the pointers to regions of the memory and the |
| other contents of the pe_ILF_vars structure as well. */ |
| vars.sym_cache = (coff_symbol_type *) ptr; |
| vars.sym_ptr = (coff_symbol_type *) ptr; |
| vars.sym_index = 0; |
| ptr += SIZEOF_ILF_SYMS; |
| |
| vars.sym_table = (unsigned int *) ptr; |
| vars.table_ptr = (unsigned int *) ptr; |
| ptr += SIZEOF_ILF_SYM_TABLE; |
| |
| vars.native_syms = (combined_entry_type *) ptr; |
| vars.native_ptr = (combined_entry_type *) ptr; |
| ptr += SIZEOF_ILF_NATIVE_SYMS; |
| |
| vars.sym_ptr_table = (coff_symbol_type **) ptr; |
| vars.sym_ptr_ptr = (coff_symbol_type **) ptr; |
| ptr += SIZEOF_ILF_SYM_PTR_TABLE; |
| |
| vars.esym_table = (SYMENT *) ptr; |
| vars.esym_ptr = (SYMENT *) ptr; |
| ptr += SIZEOF_ILF_EXT_SYMS; |
| |
| vars.reltab = (arelent *) ptr; |
| vars.relcount = 0; |
| ptr += SIZEOF_ILF_RELOCS; |
| |
| vars.int_reltab = (struct internal_reloc *) ptr; |
| ptr += SIZEOF_ILF_INT_RELOCS; |
| |
| vars.string_table = ptr; |
| vars.string_ptr = ptr + STRING_SIZE_SIZE; |
| ptr += SIZEOF_ILF_STRINGS; |
| vars.end_string_ptr = ptr; |
| |
| /* The remaining space in bim->buffer is used |
| by the pe_ILF_make_a_section() function. */ |
| vars.data = ptr; |
| vars.abfd = abfd; |
| vars.sec_index = 0; |
| vars.magic = magic; |
| |
| /* Create the initial .idata$<n> sections: |
| [.idata$2: Import Directory Table -- not needed] |
| .idata$4: Import Lookup Table |
| .idata$5: Import Address Table |
| |
| Note we do not create a .idata$3 section as this is |
| created for us by the linker script. */ |
| id4 = pe_ILF_make_a_section (& vars, ".idata$4", SIZEOF_IDATA4, 0); |
| id5 = pe_ILF_make_a_section (& vars, ".idata$5", SIZEOF_IDATA5, 0); |
| if (id4 == NULL || id5 == NULL) |
| return false; |
| |
| /* Fill in the contents of these sections. */ |
| if (import_name_type == IMPORT_ORDINAL) |
| { |
| if (ordinal == 0) |
| /* XXX - treat as IMPORT_NAME ??? */ |
| abort (); |
| |
| * (unsigned int *) id4->contents = ordinal | 0x80000000; |
| * (unsigned int *) id5->contents = ordinal | 0x80000000; |
| } |
| else |
| { |
| char * symbol; |
| |
| /* Create .idata$6 - the Hint Name Table. */ |
| id6 = pe_ILF_make_a_section (& vars, ".idata$6", SIZEOF_IDATA6, 0); |
| if (id6 == NULL) |
| return false; |
| |
| /* If necessary, trim the import symbol name. */ |
| symbol = symbol_name; |
| |
| if (import_name_type != IMPORT_NAME) |
| /* Skip any prefix in symbol_name. */ |
| while (*symbol == '@' || * symbol == '?' || * symbol == '_') |
| ++ symbol; |
| |
| if (import_name_type == IMPORT_NAME_UNDECORATE) |
| { |
| /* Truncate at the first '@' */ |
| while (* symbol != 0 && * symbol != '@') |
| symbol ++; |
| |
| * symbol = 0; |
| } |
| |
| id6->contents[0] = ordinal & 0xff; |
| id6->contents[1] = ordinal >> 8; |
| |
| strcpy (id6->contents + 2, symbol); |
| } |
| |
| if (import_name_type != IMPORT_ORDINAL) |
| { |
| pe_ILF_make_a_reloc (&vars, (bfd_vma) 0, BFD_RELOC_RVA, id6); |
| pe_ILF_save_relocs (&vars, id4); |
| |
| pe_ILF_make_a_reloc (&vars, (bfd_vma) 0, BFD_RELOC_RVA, id6); |
| pe_ILF_save_relocs (&vars, id5); |
| } |
| |
| /* Create extra sections depending upon the type of import we are dealing with. */ |
| switch (import_type) |
| { |
| int i; |
| |
| case IMPORT_CODE: |
| /* Create a .text section. |
| First we need to look up its contents in the jump table. */ |
| for (i = NUM_ENTRIES (jtab); i--;) |
| { |
| if (jtab[i].size == 0) |
| continue; |
| if (jtab[i].magic == magic) |
| break; |
| } |
| /* If we did not find a matching entry something is wrong. */ |
| if (i < 0) |
| abort (); |
| |
| /* Create the .text section. */ |
| text = pe_ILF_make_a_section (& vars, ".text", jtab[i].size, SEC_CODE); |
| if (text == NULL) |
| return false; |
| |
| /* Copy in the jump code. */ |
| memcpy (text->contents, jtab[i].data, jtab[i].size); |
| |
| /* Create an import symbol. */ |
| pe_ILF_make_a_symbol (& vars, "__imp_", symbol_name, id5, 0); |
| imp_sym = vars.sym_ptr_ptr - 1; |
| imp_index = vars.sym_index - 1; |
| |
| /* Create a reloc for the data in the text section. */ |
| #ifdef MIPS_ARCH_MAGIC_WINCE |
| if (magic == MIPS_ARCH_MAGIC_WINCE) |
| { |
| pe_ILF_make_a_symbol_reloc (&vars, (bfd_vma) 0, BFD_RELOC_HI16_S, |
| (struct symbol_cache_entry **) imp_sym, |
| imp_index); |
| pe_ILF_make_a_reloc (&vars, (bfd_vma) 0, BFD_RELOC_LO16, text); |
| pe_ILF_make_a_symbol_reloc (&vars, (bfd_vma) 4, BFD_RELOC_LO16, |
| (struct symbol_cache_entry **) imp_sym, |
| imp_index); |
| } |
| else |
| #endif |
| pe_ILF_make_a_symbol_reloc (&vars, (bfd_vma) jtab[i].offset, |
| BFD_RELOC_32, (asymbol **) imp_sym, |
| imp_index); |
| |
| pe_ILF_save_relocs (& vars, text); |
| break; |
| |
| case IMPORT_DATA: |
| break; |
| |
| default: |
| /* XXX code not yet written. */ |
| abort (); |
| } |
| |
| /* Initialise the bfd. */ |
| memset (& internal_f, 0, sizeof (internal_f)); |
| |
| internal_f.f_magic = magic; |
| internal_f.f_symptr = 0; |
| internal_f.f_nsyms = 0; |
| internal_f.f_flags = F_AR32WR | F_LNNO; /* XXX is this correct ? */ |
| |
| if ( ! bfd_set_start_address (abfd, (bfd_vma) 0) |
| || ! bfd_coff_set_arch_mach_hook (abfd, & internal_f)) |
| return false; |
| |
| if (bfd_coff_mkobject_hook (abfd, (PTR) & internal_f, NULL) == NULL) |
| return false; |
| |
| coff_data (abfd)->pe = 1; |
| #ifdef THUMBPEMAGIC |
| if (vars.magic == THUMBPEMAGIC) |
| /* Stop some linker warnings about thumb code not supporting interworking. */ |
| coff_data (abfd)->flags |= F_INTERWORK | F_INTERWORK_SET; |
| #endif |
| |
| /* Switch from file contents to memory contents. */ |
| bfd_cache_close (abfd); |
| |
| abfd->iostream = (PTR) vars.bim; |
| abfd->flags |= BFD_IN_MEMORY /* | HAS_LOCALS */; |
| abfd->where = 0; |
| obj_sym_filepos (abfd) = 0; |
| |
| /* Now create a symbol describing the imported value. */ |
| switch (import_type) |
| { |
| case IMPORT_CODE: |
| pe_ILF_make_a_symbol (& vars, "", symbol_name, text, |
| BSF_NOT_AT_END | BSF_FUNCTION); |
| |
| /* Create an import symbol for the DLL, without the |
| .dll suffix. */ |
| ptr = strrchr (source_dll, '.'); |
| if (ptr) |
| * ptr = 0; |
| pe_ILF_make_a_symbol (& vars, "__IMPORT_DESCRIPTOR_", source_dll, NULL, 0); |
| if (ptr) |
| * ptr = '.'; |
| break; |
| |
| case IMPORT_DATA: |
| /* Nothing to do here. */ |
| break; |
| |
| default: |
| /* XXX code not yet written. */ |
| abort (); |
| } |
| |
| /* Point the bfd at the symbol table. */ |
| obj_symbols (abfd) = vars.sym_cache; |
| bfd_get_symcount (abfd) = vars.sym_index; |
| |
| obj_raw_syments (abfd) = vars.native_syms; |
| obj_raw_syment_count (abfd) = vars.sym_index; |
| |
| obj_coff_external_syms (abfd) = (PTR) vars.esym_table; |
| obj_coff_keep_syms (abfd) = true; |
| |
| obj_convert (abfd) = vars.sym_table; |
| obj_conv_table_size (abfd) = vars.sym_index; |
| |
| obj_coff_strings (abfd) = vars.string_table; |
| obj_coff_keep_strings (abfd) = true; |
| |
| abfd->flags |= HAS_SYMS; |
| |
| return true; |
| } |
| |
| /* We have detected a Image Library Format archive element. |
| Decode the element and return the appropriate target. */ |
| static const bfd_target * |
| pe_ILF_object_p (bfd * abfd) |
| { |
| bfd_byte buffer[16]; |
| bfd_byte * ptr; |
| bfd_byte * symbol_name; |
| bfd_byte * source_dll; |
| unsigned int machine; |
| bfd_size_type size; |
| unsigned int ordinal; |
| unsigned int types; |
| unsigned int magic; |
| |
| /* Upon entry the first four buyes of the ILF header have |
| already been read. Now read the rest of the header. */ |
| if (bfd_bread (buffer, (bfd_size_type) 16, abfd) != 16) |
| return NULL; |
| |
| ptr = buffer; |
| |
| /* We do not bother to check the version number. |
| version = H_GET_16 (abfd, ptr); */ |
| ptr += 2; |
| |
| machine = H_GET_16 (abfd, ptr); |
| ptr += 2; |
| |
| /* Check that the machine type is recognised. */ |
| magic = 0; |
| |
| switch (machine) |
| { |
| case IMAGE_FILE_MACHINE_UNKNOWN: |
| case IMAGE_FILE_MACHINE_ALPHA: |
| case IMAGE_FILE_MACHINE_ALPHA64: |
| case IMAGE_FILE_MACHINE_IA64: |
| break; |
| |
| case IMAGE_FILE_MACHINE_I386: |
| #ifdef I386MAGIC |
| magic = I386MAGIC; |
| #endif |
| break; |
| |
| case IMAGE_FILE_MACHINE_M68K: |
| #ifdef MC68AGIC |
| magic = MC68MAGIC; |
| #endif |
| break; |
| |
| case IMAGE_FILE_MACHINE_R3000: |
| case IMAGE_FILE_MACHINE_R4000: |
| case IMAGE_FILE_MACHINE_R10000: |
| |
| case IMAGE_FILE_MACHINE_MIPS16: |
| case IMAGE_FILE_MACHINE_MIPSFPU: |
| case IMAGE_FILE_MACHINE_MIPSFPU16: |
| #ifdef MIPS_ARCH_MAGIC_WINCE |
| magic = MIPS_ARCH_MAGIC_WINCE; |
| #endif |
| break; |
| |
| case IMAGE_FILE_MACHINE_SH3: |
| case IMAGE_FILE_MACHINE_SH4: |
| #ifdef SH_ARCH_MAGIC_WINCE |
| magic = SH_ARCH_MAGIC_WINCE; |
| #endif |
| break; |
| |
| case IMAGE_FILE_MACHINE_ARM: |
| #ifdef ARMPEMAGIC |
| magic = ARMPEMAGIC; |
| #endif |
| break; |
| |
| case IMAGE_FILE_MACHINE_THUMB: |
| #ifdef THUMBPEMAGIC |
| { |
| extern const bfd_target TARGET_LITTLE_SYM; |
| |
| if (abfd->xvec == & TARGET_LITTLE_SYM) |
| magic = THUMBPEMAGIC; |
| } |
| #endif |
| break; |
| |
| case IMAGE_FILE_MACHINE_POWERPC: |
| /* We no longer support PowerPC. */ |
| default: |
| _bfd_error_handler |
| ( |
| _("%s: Unrecognised machine type (0x%x) in Import Library Format archive"), |
| bfd_archive_filename (abfd), machine); |
| bfd_set_error (bfd_error_malformed_archive); |
| |
| return NULL; |
| break; |
| } |
| |
| if (magic == 0) |
| { |
| _bfd_error_handler |
| ( |
| _("%s: Recognised but unhandled machine type (0x%x) in Import Library Format archive"), |
| bfd_archive_filename (abfd), machine); |
| bfd_set_error (bfd_error_wrong_format); |
| |
| return NULL; |
| } |
| |
| /* We do not bother to check the date. |
| date = H_GET_32 (abfd, ptr); */ |
| ptr += 4; |
| |
| size = H_GET_32 (abfd, ptr); |
| ptr += 4; |
| |
| if (size == 0) |
| { |
| _bfd_error_handler |
| (_("%s: size field is zero in Import Library Format header"), |
| bfd_archive_filename (abfd)); |
| bfd_set_error (bfd_error_malformed_archive); |
| |
| return NULL; |
| } |
| |
| ordinal = H_GET_16 (abfd, ptr); |
| ptr += 2; |
| |
| types = H_GET_16 (abfd, ptr); |
| /* ptr += 2; */ |
| |
| /* Now read in the two strings that follow. */ |
| ptr = bfd_alloc (abfd, size); |
| if (ptr == NULL) |
| return NULL; |
| |
| if (bfd_bread (ptr, size, abfd) != size) |
| return NULL; |
| |
| symbol_name = ptr; |
| source_dll = ptr + strlen (ptr) + 1; |
| |
| /* Verify that the strings are null terminated. */ |
| if (ptr[size - 1] != 0 || ((unsigned long) (source_dll - ptr) >= size)) |
| { |
| _bfd_error_handler |
| (_("%s: string not null terminated in ILF object file."), |
| bfd_archive_filename (abfd)); |
| bfd_set_error (bfd_error_malformed_archive); |
| |
| return NULL; |
| } |
| |
| /* Now construct the bfd. */ |
| if (! pe_ILF_build_a_bfd (abfd, magic, symbol_name, |
| source_dll, ordinal, types)) |
| return NULL; |
| |
| return abfd->xvec; |
| } |
| |
| static const bfd_target * |
| pe_bfd_object_p (bfd * abfd) |
| { |
| bfd_byte buffer[4]; |
| struct external_PEI_DOS_hdr dos_hdr; |
| struct external_PEI_IMAGE_hdr image_hdr; |
| file_ptr offset; |
| |
| /* Detect if this a Microsoft Import Library Format element. */ |
| if (bfd_seek (abfd, (file_ptr) 0, SEEK_SET) != 0 |
| || bfd_bread (buffer, (bfd_size_type) 4, abfd) != 4) |
| { |
| if (bfd_get_error () != bfd_error_system_call) |
| bfd_set_error (bfd_error_wrong_format); |
| return NULL; |
| } |
| |
| if (H_GET_32 (abfd, buffer) == 0xffff0000) |
| return pe_ILF_object_p (abfd); |
| |
| if (bfd_seek (abfd, (file_ptr) 0, SEEK_SET) != 0 |
| || bfd_bread (&dos_hdr, (bfd_size_type) sizeof (dos_hdr), abfd) |
| != sizeof (dos_hdr)) |
| { |
| if (bfd_get_error () != bfd_error_system_call) |
| bfd_set_error (bfd_error_wrong_format); |
| return NULL; |
| } |
| |
| /* There are really two magic numbers involved; the magic number |
| that says this is a NT executable (PEI) and the magic number that |
| determines the architecture. The former is DOSMAGIC, stored in |
| the e_magic field. The latter is stored in the f_magic field. |
| If the NT magic number isn't valid, the architecture magic number |
| could be mimicked by some other field (specifically, the number |
| of relocs in section 3). Since this routine can only be called |
| correctly for a PEI file, check the e_magic number here, and, if |
| it doesn't match, clobber the f_magic number so that we don't get |
| a false match. */ |
| if (H_GET_16 (abfd, dos_hdr.e_magic) != DOSMAGIC) |
| { |
| bfd_set_error (bfd_error_wrong_format); |
| return NULL; |
| } |
| |
| offset = H_GET_32 (abfd, dos_hdr.e_lfanew); |
| if (bfd_seek (abfd, offset, SEEK_SET) != 0 |
| || (bfd_bread (&image_hdr, (bfd_size_type) sizeof (image_hdr), abfd) |
| != sizeof (image_hdr))) |
| { |
| if (bfd_get_error () != bfd_error_system_call) |
| bfd_set_error (bfd_error_wrong_format); |
| return NULL; |
| } |
| |
| if (H_GET_32 (abfd, image_hdr.nt_signature) != 0x4550) |
| { |
| bfd_set_error (bfd_error_wrong_format); |
| return NULL; |
| } |
| |
| /* Here is the hack. coff_object_p wants to read filhsz bytes to |
| pick up the COFF header for PE, see "struct external_PEI_filehdr" |
| in include/coff/pe.h. We adjust so that that will work. */ |
| if (bfd_seek (abfd, (file_ptr) (offset - sizeof (dos_hdr)), SEEK_SET) != 0) |
| { |
| if (bfd_get_error () != bfd_error_system_call) |
| bfd_set_error (bfd_error_wrong_format); |
| return NULL; |
| } |
| |
| return coff_object_p (abfd); |
| } |
| |
| #define coff_object_p pe_bfd_object_p |
| #endif /* COFF_IMAGE_WITH_PE */ |