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ea4e4a19b7
_bfd_check_format functions should not print errors or warnings if they return NULL. A NULL return means the particular target under test does not match, so there isn't any reason to make a complaint about the target. In fact there isn't a good reason to warn even if the target matches, except via the _bfd_per_xvec_warn mechanism; Some other target might be a better match. This patch tidies pe_bfd_object_p with the above in mind, and restricts the PE optional header SectionAlignment and FileAlignment fields somewhat. I chose to warn on nonsense values rather than refusing to match. Refusing to match would be OK too. PR 29653 * peXXigen.c (_bfd_XXi_swap_aouthdr_in): Don't emit error about invalid NumberOfRvaAndSizes here. Limit loop copying data directory to IMAGE_NUMBEROF_DIRECTORY_ENTRIES. * peicode.h (pe_bfd_object_p): Don't clear and test bfd_error around bfd_coff_swap_aouthdr_in. Warn on invalid SectionAlignment, FileAlignment and NumberOfRvaAndSizes. Don't return NULL on invalid NumberOfRvaAndSizes.
1568 lines
45 KiB
C
1568 lines
45 KiB
C
/* Support for the generic parts of PE/PEI, for BFD.
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Copyright (C) 1995-2022 Free Software Foundation, Inc.
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Written by Cygnus Solutions.
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This file is part of BFD, the Binary File Descriptor library.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
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MA 02110-1301, USA. */
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/* Most of this hacked by Steve Chamberlain,
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sac@cygnus.com
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PE/PEI rearrangement (and code added): Donn Terry
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Softway Systems, Inc. */
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/* Hey look, some documentation [and in a place you expect to find it]!
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The main reference for the pei format is "Microsoft Portable Executable
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and Common Object File Format Specification 4.1". Get it if you need to
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do some serious hacking on this code.
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Another reference:
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"Peering Inside the PE: A Tour of the Win32 Portable Executable
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File Format", MSJ 1994, Volume 9.
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The *sole* difference between the pe format and the pei format is that the
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latter has an MSDOS 2.0 .exe header on the front that prints the message
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"This app must be run under Windows." (or some such).
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(FIXME: Whether that statement is *really* true or not is unknown.
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Are there more subtle differences between pe and pei formats?
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For now assume there aren't. If you find one, then for God sakes
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document it here!)
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The Microsoft docs use the word "image" instead of "executable" because
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the former can also refer to a DLL (shared library). Confusion can arise
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because the `i' in `pei' also refers to "image". The `pe' format can
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also create images (i.e. executables), it's just that to run on a win32
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system you need to use the pei format.
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FIXME: Please add more docs here so the next poor fool that has to hack
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on this code has a chance of getting something accomplished without
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wasting too much time. */
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#include "libpei.h"
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static bool (*pe_saved_coff_bfd_print_private_bfd_data) (bfd *, void *) =
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#ifndef coff_bfd_print_private_bfd_data
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NULL;
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#else
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coff_bfd_print_private_bfd_data;
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#undef coff_bfd_print_private_bfd_data
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#endif
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static bool pe_print_private_bfd_data (bfd *, void *);
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#define coff_bfd_print_private_bfd_data pe_print_private_bfd_data
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static bool (*pe_saved_coff_bfd_copy_private_bfd_data) (bfd *, bfd *) =
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#ifndef coff_bfd_copy_private_bfd_data
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NULL;
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#else
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coff_bfd_copy_private_bfd_data;
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#undef coff_bfd_copy_private_bfd_data
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#endif
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static bool pe_bfd_copy_private_bfd_data (bfd *, bfd *);
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#define coff_bfd_copy_private_bfd_data pe_bfd_copy_private_bfd_data
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#define coff_mkobject pe_mkobject
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#define coff_mkobject_hook pe_mkobject_hook
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#ifdef COFF_IMAGE_WITH_PE
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/* This structure contains static variables used by the ILF code. */
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typedef asection * asection_ptr;
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typedef struct
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{
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bfd * abfd;
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bfd_byte * data;
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struct bfd_in_memory * bim;
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unsigned short magic;
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arelent * reltab;
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unsigned int relcount;
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coff_symbol_type * sym_cache;
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coff_symbol_type * sym_ptr;
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unsigned int sym_index;
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unsigned int * sym_table;
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unsigned int * table_ptr;
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combined_entry_type * native_syms;
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combined_entry_type * native_ptr;
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coff_symbol_type ** sym_ptr_table;
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coff_symbol_type ** sym_ptr_ptr;
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unsigned int sec_index;
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char * string_table;
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char * string_ptr;
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char * end_string_ptr;
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SYMENT * esym_table;
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SYMENT * esym_ptr;
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struct internal_reloc * int_reltab;
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}
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pe_ILF_vars;
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#endif /* COFF_IMAGE_WITH_PE */
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bfd_cleanup coff_real_object_p
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(bfd *, unsigned, struct internal_filehdr *, struct internal_aouthdr *);
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#ifndef NO_COFF_RELOCS
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static void
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coff_swap_reloc_in (bfd * abfd, void * src, void * dst)
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{
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RELOC *reloc_src = (RELOC *) src;
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struct internal_reloc *reloc_dst = (struct internal_reloc *) dst;
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reloc_dst->r_vaddr = H_GET_32 (abfd, reloc_src->r_vaddr);
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reloc_dst->r_symndx = H_GET_S32 (abfd, reloc_src->r_symndx);
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reloc_dst->r_type = H_GET_16 (abfd, reloc_src->r_type);
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#ifdef SWAP_IN_RELOC_OFFSET
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reloc_dst->r_offset = SWAP_IN_RELOC_OFFSET (abfd, reloc_src->r_offset);
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#endif
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}
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static unsigned int
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coff_swap_reloc_out (bfd * abfd, void * src, void * dst)
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{
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struct internal_reloc *reloc_src = (struct internal_reloc *) src;
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struct external_reloc *reloc_dst = (struct external_reloc *) dst;
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H_PUT_32 (abfd, reloc_src->r_vaddr, reloc_dst->r_vaddr);
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H_PUT_32 (abfd, reloc_src->r_symndx, reloc_dst->r_symndx);
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H_PUT_16 (abfd, reloc_src->r_type, reloc_dst->r_type);
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#ifdef SWAP_OUT_RELOC_OFFSET
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SWAP_OUT_RELOC_OFFSET (abfd, reloc_src->r_offset, reloc_dst->r_offset);
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#endif
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#ifdef SWAP_OUT_RELOC_EXTRA
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SWAP_OUT_RELOC_EXTRA (abfd, reloc_src, reloc_dst);
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#endif
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return RELSZ;
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}
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#endif /* not NO_COFF_RELOCS */
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#ifdef COFF_IMAGE_WITH_PE
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#undef FILHDR
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#define FILHDR struct external_PEI_IMAGE_hdr
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#endif
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static void
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coff_swap_filehdr_in (bfd * abfd, void * src, void * dst)
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{
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FILHDR *filehdr_src = (FILHDR *) src;
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struct internal_filehdr *filehdr_dst = (struct internal_filehdr *) dst;
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filehdr_dst->f_magic = H_GET_16 (abfd, filehdr_src->f_magic);
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filehdr_dst->f_nscns = H_GET_16 (abfd, filehdr_src->f_nscns);
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filehdr_dst->f_timdat = H_GET_32 (abfd, filehdr_src->f_timdat);
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filehdr_dst->f_nsyms = H_GET_32 (abfd, filehdr_src->f_nsyms);
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filehdr_dst->f_flags = H_GET_16 (abfd, filehdr_src->f_flags);
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filehdr_dst->f_symptr = H_GET_32 (abfd, filehdr_src->f_symptr);
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/* Other people's tools sometimes generate headers with an nsyms but
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a zero symptr. */
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if (filehdr_dst->f_nsyms != 0 && filehdr_dst->f_symptr == 0)
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{
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filehdr_dst->f_nsyms = 0;
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filehdr_dst->f_flags |= F_LSYMS;
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}
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filehdr_dst->f_opthdr = H_GET_16 (abfd, filehdr_src-> f_opthdr);
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}
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#ifdef COFF_IMAGE_WITH_PE
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# define coff_swap_filehdr_out _bfd_XXi_only_swap_filehdr_out
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#elif defined COFF_WITH_pex64
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# define coff_swap_filehdr_out _bfd_pex64_only_swap_filehdr_out
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#elif defined COFF_WITH_pep
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# define coff_swap_filehdr_out _bfd_pep_only_swap_filehdr_out
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#else
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# define coff_swap_filehdr_out _bfd_pe_only_swap_filehdr_out
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#endif
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static void
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coff_swap_scnhdr_in (bfd * abfd, void * ext, void * in)
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{
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SCNHDR *scnhdr_ext = (SCNHDR *) ext;
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struct internal_scnhdr *scnhdr_int = (struct internal_scnhdr *) in;
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memcpy (scnhdr_int->s_name, scnhdr_ext->s_name, sizeof (scnhdr_int->s_name));
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scnhdr_int->s_vaddr = GET_SCNHDR_VADDR (abfd, scnhdr_ext->s_vaddr);
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scnhdr_int->s_paddr = GET_SCNHDR_PADDR (abfd, scnhdr_ext->s_paddr);
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scnhdr_int->s_size = GET_SCNHDR_SIZE (abfd, scnhdr_ext->s_size);
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scnhdr_int->s_scnptr = GET_SCNHDR_SCNPTR (abfd, scnhdr_ext->s_scnptr);
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scnhdr_int->s_relptr = GET_SCNHDR_RELPTR (abfd, scnhdr_ext->s_relptr);
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scnhdr_int->s_lnnoptr = GET_SCNHDR_LNNOPTR (abfd, scnhdr_ext->s_lnnoptr);
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scnhdr_int->s_flags = H_GET_32 (abfd, scnhdr_ext->s_flags);
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/* MS handles overflow of line numbers by carrying into the reloc
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field (it appears). Since it's supposed to be zero for PE
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*IMAGE* format, that's safe. This is still a bit iffy. */
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#ifdef COFF_IMAGE_WITH_PE
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scnhdr_int->s_nlnno = (H_GET_16 (abfd, scnhdr_ext->s_nlnno)
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+ (H_GET_16 (abfd, scnhdr_ext->s_nreloc) << 16));
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scnhdr_int->s_nreloc = 0;
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#else
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scnhdr_int->s_nreloc = H_GET_16 (abfd, scnhdr_ext->s_nreloc);
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scnhdr_int->s_nlnno = H_GET_16 (abfd, scnhdr_ext->s_nlnno);
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#endif
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if (scnhdr_int->s_vaddr != 0)
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{
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scnhdr_int->s_vaddr += pe_data (abfd)->pe_opthdr.ImageBase;
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/* Do not cut upper 32-bits for 64-bit vma. */
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#if !defined(COFF_WITH_pex64) && !defined(COFF_WITH_peAArch64) && !defined(COFF_WITH_peLoongArch64)
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scnhdr_int->s_vaddr &= 0xffffffff;
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#endif
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}
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#ifndef COFF_NO_HACK_SCNHDR_SIZE
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/* If this section holds uninitialized data and is from an object file
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or from an executable image that has not initialized the field,
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or if the image is an executable file and the physical size is padded,
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use the virtual size (stored in s_paddr) instead. */
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if (scnhdr_int->s_paddr > 0
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&& (((scnhdr_int->s_flags & IMAGE_SCN_CNT_UNINITIALIZED_DATA) != 0
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&& (! bfd_pei_p (abfd) || scnhdr_int->s_size == 0))
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|| (bfd_pei_p (abfd) && (scnhdr_int->s_size > scnhdr_int->s_paddr))))
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/* This code used to set scnhdr_int->s_paddr to 0. However,
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coff_set_alignment_hook stores s_paddr in virt_size, which
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only works if it correctly holds the virtual size of the
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section. */
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scnhdr_int->s_size = scnhdr_int->s_paddr;
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#endif
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}
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static bool
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pe_mkobject (bfd * abfd)
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{
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pe_data_type *pe;
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size_t amt = sizeof (pe_data_type);
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abfd->tdata.pe_obj_data = (struct pe_tdata *) bfd_zalloc (abfd, amt);
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if (abfd->tdata.pe_obj_data == 0)
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return false;
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pe = pe_data (abfd);
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pe->coff.pe = 1;
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/* in_reloc_p is architecture dependent. */
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pe->in_reloc_p = in_reloc_p;
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/* Default DOS message string. */
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pe->dos_message[0] = 0x0eba1f0e;
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pe->dos_message[1] = 0xcd09b400;
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pe->dos_message[2] = 0x4c01b821;
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pe->dos_message[3] = 0x685421cd;
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pe->dos_message[4] = 0x70207369;
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pe->dos_message[5] = 0x72676f72;
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pe->dos_message[6] = 0x63206d61;
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pe->dos_message[7] = 0x6f6e6e61;
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pe->dos_message[8] = 0x65622074;
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pe->dos_message[9] = 0x6e757220;
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pe->dos_message[10] = 0x206e6920;
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pe->dos_message[11] = 0x20534f44;
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pe->dos_message[12] = 0x65646f6d;
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pe->dos_message[13] = 0x0a0d0d2e;
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pe->dos_message[14] = 0x24;
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pe->dos_message[15] = 0x0;
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memset (& pe->pe_opthdr, 0, sizeof pe->pe_opthdr);
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return true;
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}
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/* Create the COFF backend specific information. */
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static void *
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pe_mkobject_hook (bfd * abfd,
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void * filehdr,
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void * aouthdr ATTRIBUTE_UNUSED)
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{
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struct internal_filehdr *internal_f = (struct internal_filehdr *) filehdr;
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pe_data_type *pe;
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if (! pe_mkobject (abfd))
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return NULL;
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pe = pe_data (abfd);
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pe->coff.sym_filepos = internal_f->f_symptr;
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/* These members communicate important constants about the symbol
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table to GDB's symbol-reading code. These `constants'
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unfortunately vary among coff implementations... */
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pe->coff.local_n_btmask = N_BTMASK;
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pe->coff.local_n_btshft = N_BTSHFT;
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pe->coff.local_n_tmask = N_TMASK;
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pe->coff.local_n_tshift = N_TSHIFT;
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pe->coff.local_symesz = SYMESZ;
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pe->coff.local_auxesz = AUXESZ;
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pe->coff.local_linesz = LINESZ;
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||
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pe->coff.timestamp = internal_f->f_timdat;
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obj_raw_syment_count (abfd) =
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obj_conv_table_size (abfd) =
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internal_f->f_nsyms;
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pe->real_flags = internal_f->f_flags;
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if ((internal_f->f_flags & F_DLL) != 0)
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pe->dll = 1;
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if ((internal_f->f_flags & IMAGE_FILE_DEBUG_STRIPPED) == 0)
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abfd->flags |= HAS_DEBUG;
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#ifdef COFF_IMAGE_WITH_PE
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if (aouthdr)
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pe->pe_opthdr = ((struct internal_aouthdr *) aouthdr)->pe;
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#endif
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||
|
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#ifdef ARM
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if (! _bfd_coff_arm_set_private_flags (abfd, internal_f->f_flags))
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coff_data (abfd) ->flags = 0;
|
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#endif
|
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memcpy (pe->dos_message, internal_f->pe.dos_message,
|
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sizeof (pe->dos_message));
|
||
|
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return (void *) pe;
|
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}
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|
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static bool
|
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pe_print_private_bfd_data (bfd *abfd, void * vfile)
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{
|
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FILE *file = (FILE *) vfile;
|
||
|
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if (!_bfd_XX_print_private_bfd_data_common (abfd, vfile))
|
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return false;
|
||
|
||
if (pe_saved_coff_bfd_print_private_bfd_data == NULL)
|
||
return true;
|
||
|
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fputc ('\n', file);
|
||
|
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return pe_saved_coff_bfd_print_private_bfd_data (abfd, vfile);
|
||
}
|
||
|
||
/* Copy any private info we understand from the input bfd
|
||
to the output bfd. */
|
||
|
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static bool
|
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pe_bfd_copy_private_bfd_data (bfd *ibfd, bfd *obfd)
|
||
{
|
||
/* PR binutils/716: Copy the large address aware flag.
|
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XXX: Should we be copying other flags or other fields in the pe_data()
|
||
structure ? */
|
||
if (pe_data (obfd) != NULL
|
||
&& pe_data (ibfd) != NULL
|
||
&& pe_data (ibfd)->real_flags & IMAGE_FILE_LARGE_ADDRESS_AWARE)
|
||
pe_data (obfd)->real_flags |= IMAGE_FILE_LARGE_ADDRESS_AWARE;
|
||
|
||
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)
|
||
|
||
/* For PEx64 idata4 & 5 have thumb size of 8 bytes. */
|
||
#ifdef COFF_WITH_pex64
|
||
#define SIZEOF_IDATA4 (2 * 4)
|
||
#define SIZEOF_IDATA5 (2 * 4)
|
||
#else
|
||
#define SIZEOF_IDATA4 (1 * 4)
|
||
#define SIZEOF_IDATA5 (1 * 4)
|
||
#endif
|
||
|
||
#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_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 bfd_symbol ** 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 ? entry->howto->type : 0;
|
||
|
||
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 = bfd_und_section_ptr;
|
||
|
||
/* 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. */
|
||
|
||
/* 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 = (uintptr_t) sym;
|
||
ent->is_sym = true;
|
||
|
||
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;
|
||
|
||
* 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;
|
||
intptr_t alignment;
|
||
|
||
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 (sec, flags | extra_flags);
|
||
|
||
bfd_set_section_alignment (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 (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 --;
|
||
|
||
/* PR 18758: See note in pe_ILF_buid_a_bfd. We must make sure that we
|
||
preserve host alignment requirements. The BFD_ASSERTs in this
|
||
functions will warn us if we run out of room, but we should
|
||
already have enough padding built in to ILF_DATA_SIZE. */
|
||
#if GCC_VERSION >= 3000
|
||
alignment = __alignof__ (struct coff_section_tdata);
|
||
#else
|
||
alignment = 8;
|
||
#endif
|
||
vars->data
|
||
= (bfd_byte *) (((intptr_t) vars->data + alignment - 1) & -alignment);
|
||
|
||
/* 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 const jump_table jtab[] =
|
||
{
|
||
#ifdef I386MAGIC
|
||
{ I386MAGIC,
|
||
{ 0xff, 0x25, 0x00, 0x00, 0x00, 0x00, 0x90, 0x90 },
|
||
8, 2
|
||
},
|
||
#endif
|
||
|
||
#ifdef AMD64MAGIC
|
||
{ AMD64MAGIC,
|
||
{ 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 AARCH64MAGIC
|
||
/* We don't currently support jumping to DLLs, so if
|
||
someone does try emit a runtime trap. Through UDF #0. */
|
||
{ AARCH64MAGIC,
|
||
{ 0x00, 0x00, 0x00, 0x00 },
|
||
4, 0
|
||
},
|
||
|
||
#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
|
||
|
||
#ifdef LOONGARCH64MAGIC
|
||
/* We don't currently support jumping to DLLs, so if
|
||
someone does try emit a runtime trap. Through BREAK 0. */
|
||
{ LOONGARCH64MAGIC,
|
||
{ 0x00, 0x00, 0x2a, 0x00 },
|
||
4, 0
|
||
},
|
||
|
||
#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 bool
|
||
pe_ILF_build_a_bfd (bfd * abfd,
|
||
unsigned int magic,
|
||
char * symbol_name,
|
||
char * 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;
|
||
intptr_t alignment;
|
||
|
||
/* 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. */
|
||
/* xgettext:c-format */
|
||
_bfd_error_handler (_("%pB: unhandled import type; %x"),
|
||
abfd, import_type);
|
||
return false;
|
||
|
||
default:
|
||
/* xgettext:c-format */
|
||
_bfd_error_handler (_("%pB: unrecognized import type; %x"),
|
||
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:
|
||
/* xgettext:c-format */
|
||
_bfd_error_handler (_("%pB: unrecognized import name type; %x"),
|
||
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. */
|
||
vars.bim
|
||
= (struct bfd_in_memory *) bfd_malloc ((bfd_size_type) sizeof (*vars.bim));
|
||
if (vars.bim == NULL)
|
||
return false;
|
||
|
||
ptr = (bfd_byte *) bfd_zmalloc ((bfd_size_type) ILF_DATA_SIZE);
|
||
vars.bim->buffer = ptr;
|
||
vars.bim->size = ILF_DATA_SIZE;
|
||
if (ptr == NULL)
|
||
goto error_return;
|
||
|
||
/* 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 = (char *) ptr;
|
||
vars.string_ptr = (char *) ptr + STRING_SIZE_SIZE;
|
||
ptr += SIZEOF_ILF_STRINGS;
|
||
vars.end_string_ptr = (char *) ptr;
|
||
|
||
/* The remaining space in bim->buffer is used
|
||
by the pe_ILF_make_a_section() function. */
|
||
|
||
/* PR 18758: Make sure that the data area is sufficiently aligned for
|
||
struct coff_section_tdata. __alignof__ is a gcc extension, hence
|
||
the test of GCC_VERSION. For other compilers we assume 8 byte
|
||
alignment. */
|
||
#if GCC_VERSION >= 3000
|
||
alignment = __alignof__ (struct coff_section_tdata);
|
||
#else
|
||
alignment = 8;
|
||
#endif
|
||
ptr = (bfd_byte *) (((intptr_t) ptr + alignment - 1) & -alignment);
|
||
|
||
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)
|
||
goto error_return;
|
||
|
||
/* Fill in the contents of these sections. */
|
||
if (import_name_type == IMPORT_ORDINAL)
|
||
{
|
||
if (ordinal == 0)
|
||
/* See PR 20907 for a reproducer. */
|
||
goto error_return;
|
||
|
||
#if defined(COFF_WITH_pex64) || defined(COFF_WITH_peAArch64) || defined(COFF_WITH_peLoongArch64)
|
||
((unsigned int *) id4->contents)[0] = ordinal;
|
||
((unsigned int *) id4->contents)[1] = 0x80000000;
|
||
((unsigned int *) id5->contents)[0] = ordinal;
|
||
((unsigned int *) id5->contents)[1] = 0x80000000;
|
||
#else
|
||
* (unsigned int *) id4->contents = ordinal | 0x80000000;
|
||
* (unsigned int *) id5->contents = ordinal | 0x80000000;
|
||
#endif
|
||
}
|
||
else
|
||
{
|
||
char * symbol;
|
||
unsigned int len;
|
||
|
||
/* Create .idata$6 - the Hint Name Table. */
|
||
id6 = pe_ILF_make_a_section (& vars, ".idata$6", SIZEOF_IDATA6, 0);
|
||
if (id6 == NULL)
|
||
goto error_return;
|
||
|
||
/* If necessary, trim the import symbol name. */
|
||
symbol = symbol_name;
|
||
|
||
/* As used by MS compiler, '_', '@', and '?' are alternative
|
||
forms of USER_LABEL_PREFIX, with '?' for c++ mangled names,
|
||
'@' used for fastcall (in C), '_' everywhere else. Only one
|
||
of these is used for a symbol. We strip this leading char for
|
||
IMPORT_NAME_NOPREFIX and IMPORT_NAME_UNDECORATE as per the
|
||
PE COFF 6.0 spec (section 8.3, Import Name Type). */
|
||
|
||
if (import_name_type != IMPORT_NAME)
|
||
{
|
||
char c = symbol[0];
|
||
|
||
/* Check that we don't remove for targets with empty
|
||
USER_LABEL_PREFIX the leading underscore. */
|
||
if ((c == '_' && abfd->xvec->symbol_leading_char != 0)
|
||
|| c == '@' || c == '?')
|
||
symbol++;
|
||
}
|
||
|
||
len = strlen (symbol);
|
||
if (import_name_type == IMPORT_NAME_UNDECORATE)
|
||
{
|
||
/* Truncate at the first '@'. */
|
||
char *at = strchr (symbol, '@');
|
||
|
||
if (at != NULL)
|
||
len = at - symbol;
|
||
}
|
||
|
||
id6->contents[0] = ordinal & 0xff;
|
||
id6->contents[1] = ordinal >> 8;
|
||
|
||
memcpy ((char *) id6->contents + 2, symbol, len);
|
||
id6->contents[len + 2] = '\0';
|
||
}
|
||
|
||
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 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 extra sections depending upon the type of import we are dealing with. */
|
||
switch (import_type)
|
||
{
|
||
int i;
|
||
|
||
case IMPORT_CODE:
|
||
/* CODE functions are special, in that they get a trampoline that
|
||
jumps to the main import symbol. Create a .text section to hold it.
|
||
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)
|
||
goto error_return;
|
||
|
||
/* Copy in the jump code. */
|
||
memcpy (text->contents, jtab[i].data, jtab[i].size);
|
||
|
||
/* 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 bfd_symbol **) 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 bfd_symbol **) imp_sym,
|
||
imp_index);
|
||
}
|
||
else
|
||
#endif
|
||
#ifdef AMD64MAGIC
|
||
if (magic == AMD64MAGIC)
|
||
{
|
||
pe_ILF_make_a_symbol_reloc (&vars, (bfd_vma) jtab[i].offset,
|
||
BFD_RELOC_32_PCREL, (asymbol **) 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))
|
||
goto error_return;
|
||
|
||
if (bfd_coff_mkobject_hook (abfd, (void *) & internal_f, NULL) == NULL)
|
||
goto error_return;
|
||
|
||
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 = (void *) vars.bim;
|
||
abfd->flags |= BFD_IN_MEMORY /* | HAS_LOCALS */;
|
||
abfd->iovec = &_bfd_memory_iovec;
|
||
abfd->where = 0;
|
||
abfd->origin = 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);
|
||
|
||
break;
|
||
|
||
case IMPORT_DATA:
|
||
/* Nothing to do here. */
|
||
break;
|
||
|
||
default:
|
||
/* XXX code not yet written. */
|
||
abort ();
|
||
}
|
||
|
||
/* Create an import symbol for the DLL, without the .dll suffix. */
|
||
ptr = (bfd_byte *) strrchr (source_dll, '.');
|
||
if (ptr)
|
||
* ptr = 0;
|
||
pe_ILF_make_a_symbol (& vars, "__IMPORT_DESCRIPTOR_", source_dll, NULL, 0);
|
||
if (ptr)
|
||
* ptr = '.';
|
||
|
||
/* Point the bfd at the symbol table. */
|
||
obj_symbols (abfd) = vars.sym_cache;
|
||
abfd->symcount = vars.sym_index;
|
||
|
||
obj_raw_syments (abfd) = vars.native_syms;
|
||
obj_raw_syment_count (abfd) = vars.sym_index;
|
||
|
||
obj_coff_external_syms (abfd) = (void *) 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;
|
||
|
||
error_return:
|
||
free (vars.bim->buffer);
|
||
free (vars.bim);
|
||
return false;
|
||
}
|
||
|
||
/* We have detected a Image Library Format archive element.
|
||
Decode the element and return the appropriate target. */
|
||
|
||
static bfd_cleanup
|
||
pe_ILF_object_p (bfd * abfd)
|
||
{
|
||
bfd_byte buffer[14];
|
||
bfd_byte * ptr;
|
||
char * symbol_name;
|
||
char * source_dll;
|
||
unsigned int machine;
|
||
bfd_size_type size;
|
||
unsigned int ordinal;
|
||
unsigned int types;
|
||
unsigned int magic;
|
||
|
||
/* Upon entry the first six bytes of the ILF header have
|
||
already been read. Now read the rest of the header. */
|
||
if (bfd_bread (buffer, (bfd_size_type) 14, abfd) != 14)
|
||
return NULL;
|
||
|
||
ptr = buffer;
|
||
|
||
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_AMD64:
|
||
#ifdef AMD64MAGIC
|
||
magic = AMD64MAGIC;
|
||
#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_ARM64:
|
||
#ifdef AARCH64MAGIC
|
||
magic = AARCH64MAGIC;
|
||
#endif
|
||
break;
|
||
|
||
case IMAGE_FILE_MACHINE_LOONGARCH64:
|
||
#ifdef LOONGARCH64MAGIC
|
||
magic = LOONGARCH64MAGIC;
|
||
#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
|
||
/* xgettext:c-format */
|
||
(_("%pB: unrecognised machine type (0x%x)"
|
||
" in Import Library Format archive"),
|
||
abfd, machine);
|
||
bfd_set_error (bfd_error_malformed_archive);
|
||
|
||
return NULL;
|
||
break;
|
||
}
|
||
|
||
if (magic == 0)
|
||
{
|
||
_bfd_error_handler
|
||
/* xgettext:c-format */
|
||
(_("%pB: recognised but unhandled machine type (0x%x)"
|
||
" in Import Library Format archive"),
|
||
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
|
||
(_("%pB: size field is zero in Import Library Format header"), 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_byte *) _bfd_alloc_and_read (abfd, size, size);
|
||
if (ptr == NULL)
|
||
return NULL;
|
||
|
||
symbol_name = (char *) ptr;
|
||
/* See PR 20905 for an example of where the strnlen is necessary. */
|
||
source_dll = symbol_name + strnlen (symbol_name, size - 1) + 1;
|
||
|
||
/* Verify that the strings are null terminated. */
|
||
if (ptr[size - 1] != 0
|
||
|| (bfd_size_type) ((bfd_byte *) source_dll - ptr) >= size)
|
||
{
|
||
_bfd_error_handler
|
||
(_("%pB: string not null terminated in ILF object file"), abfd);
|
||
bfd_set_error (bfd_error_malformed_archive);
|
||
bfd_release (abfd, ptr);
|
||
return NULL;
|
||
}
|
||
|
||
/* Now construct the bfd. */
|
||
if (! pe_ILF_build_a_bfd (abfd, magic, symbol_name,
|
||
source_dll, ordinal, types))
|
||
{
|
||
bfd_release (abfd, ptr);
|
||
return NULL;
|
||
}
|
||
|
||
return _bfd_no_cleanup;
|
||
}
|
||
|
||
static void
|
||
pe_bfd_read_buildid (bfd *abfd)
|
||
{
|
||
pe_data_type *pe = pe_data (abfd);
|
||
struct internal_extra_pe_aouthdr *extra = &pe->pe_opthdr;
|
||
asection *section;
|
||
bfd_byte *data = 0;
|
||
bfd_size_type dataoff;
|
||
unsigned int i;
|
||
bfd_vma addr = extra->DataDirectory[PE_DEBUG_DATA].VirtualAddress;
|
||
bfd_size_type size = extra->DataDirectory[PE_DEBUG_DATA].Size;
|
||
|
||
if (size == 0)
|
||
return;
|
||
|
||
addr += extra->ImageBase;
|
||
|
||
/* Search for the section containing the DebugDirectory. */
|
||
for (section = abfd->sections; section != NULL; section = section->next)
|
||
{
|
||
if ((addr >= section->vma) && (addr < (section->vma + section->size)))
|
||
break;
|
||
}
|
||
|
||
if (section == NULL)
|
||
return;
|
||
|
||
if (!(section->flags & SEC_HAS_CONTENTS))
|
||
return;
|
||
|
||
dataoff = addr - section->vma;
|
||
|
||
/* PR 20605 and 22373: Make sure that the data is really there.
|
||
Note - since we are dealing with unsigned quantities we have
|
||
to be careful to check for potential overflows. */
|
||
if (dataoff >= section->size
|
||
|| size > section->size - dataoff)
|
||
{
|
||
_bfd_error_handler
|
||
(_("%pB: error: debug data ends beyond end of debug directory"),
|
||
abfd);
|
||
return;
|
||
}
|
||
|
||
/* Read the whole section. */
|
||
if (!bfd_malloc_and_get_section (abfd, section, &data))
|
||
{
|
||
free (data);
|
||
return;
|
||
}
|
||
|
||
/* Search for a CodeView entry in the DebugDirectory */
|
||
for (i = 0; i < size / sizeof (struct external_IMAGE_DEBUG_DIRECTORY); i++)
|
||
{
|
||
struct external_IMAGE_DEBUG_DIRECTORY *ext
|
||
= &((struct external_IMAGE_DEBUG_DIRECTORY *)(data + dataoff))[i];
|
||
struct internal_IMAGE_DEBUG_DIRECTORY idd;
|
||
|
||
_bfd_XXi_swap_debugdir_in (abfd, ext, &idd);
|
||
|
||
if (idd.Type == PE_IMAGE_DEBUG_TYPE_CODEVIEW)
|
||
{
|
||
char buffer[256 + 1];
|
||
CODEVIEW_INFO *cvinfo = (CODEVIEW_INFO *) buffer;
|
||
|
||
/*
|
||
The debug entry doesn't have to have to be in a section, in which
|
||
case AddressOfRawData is 0, so always use PointerToRawData.
|
||
*/
|
||
if (_bfd_XXi_slurp_codeview_record (abfd,
|
||
(file_ptr) idd.PointerToRawData,
|
||
idd.SizeOfData, cvinfo))
|
||
{
|
||
struct bfd_build_id* build_id = bfd_alloc (abfd,
|
||
sizeof (struct bfd_build_id) + cvinfo->SignatureLength);
|
||
if (build_id)
|
||
{
|
||
build_id->size = cvinfo->SignatureLength;
|
||
memcpy(build_id->data, cvinfo->Signature,
|
||
cvinfo->SignatureLength);
|
||
abfd->build_id = build_id;
|
||
}
|
||
}
|
||
break;
|
||
}
|
||
}
|
||
|
||
free (data);
|
||
}
|
||
|
||
static bfd_cleanup
|
||
pe_bfd_object_p (bfd * abfd)
|
||
{
|
||
bfd_byte buffer[6];
|
||
struct external_DOS_hdr dos_hdr;
|
||
struct external_PEI_IMAGE_hdr image_hdr;
|
||
struct internal_filehdr internal_f;
|
||
struct internal_aouthdr internal_a;
|
||
bfd_size_type opt_hdr_size;
|
||
file_ptr offset;
|
||
bfd_cleanup result;
|
||
|
||
/* Detect if this a Microsoft Import Library Format element. */
|
||
/* First read the beginning of the header. */
|
||
if (bfd_seek (abfd, (file_ptr) 0, SEEK_SET) != 0
|
||
|| bfd_bread (buffer, (bfd_size_type) 6, abfd) != 6)
|
||
{
|
||
if (bfd_get_error () != bfd_error_system_call)
|
||
bfd_set_error (bfd_error_wrong_format);
|
||
return NULL;
|
||
}
|
||
|
||
/* Then check the magic and the version (only 0 is supported). */
|
||
if (H_GET_32 (abfd, buffer) == 0xffff0000
|
||
&& H_GET_16 (abfd, buffer + 4) == 0)
|
||
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 IMAGE_DOS_SIGNATURE, 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) != IMAGE_DOS_SIGNATURE)
|
||
{
|
||
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;
|
||
}
|
||
|
||
/* Swap file header, so that we get the location for calling
|
||
real_object_p. */
|
||
bfd_coff_swap_filehdr_in (abfd, &image_hdr, &internal_f);
|
||
|
||
if (! bfd_coff_bad_format_hook (abfd, &internal_f)
|
||
|| internal_f.f_opthdr > bfd_coff_aoutsz (abfd))
|
||
{
|
||
bfd_set_error (bfd_error_wrong_format);
|
||
return NULL;
|
||
}
|
||
|
||
memcpy (internal_f.pe.dos_message, dos_hdr.dos_message,
|
||
sizeof (internal_f.pe.dos_message));
|
||
|
||
/* Read the optional header, which has variable size. */
|
||
opt_hdr_size = internal_f.f_opthdr;
|
||
|
||
if (opt_hdr_size != 0)
|
||
{
|
||
bfd_size_type amt = opt_hdr_size;
|
||
bfd_byte * opthdr;
|
||
|
||
/* PR 17521 file: 230-131433-0.004. */
|
||
if (amt < sizeof (PEAOUTHDR))
|
||
amt = sizeof (PEAOUTHDR);
|
||
|
||
opthdr = _bfd_alloc_and_read (abfd, amt, opt_hdr_size);
|
||
if (opthdr == NULL)
|
||
return NULL;
|
||
if (amt > opt_hdr_size)
|
||
memset (opthdr + opt_hdr_size, 0, amt - opt_hdr_size);
|
||
|
||
bfd_coff_swap_aouthdr_in (abfd, opthdr, &internal_a);
|
||
|
||
struct internal_extra_pe_aouthdr *a = &internal_a.pe;
|
||
if ((a->SectionAlignment & -a->SectionAlignment) != a->SectionAlignment
|
||
|| a->SectionAlignment >= 0x80000000)
|
||
{
|
||
const char **warn = _bfd_per_xvec_warn (abfd->xvec);
|
||
*warn = _("%pB: adjusting invalid SectionAlignment");
|
||
a->SectionAlignment &= -a->SectionAlignment;
|
||
if (a->SectionAlignment >= 0x80000000)
|
||
a->SectionAlignment = 0x40000000;
|
||
}
|
||
|
||
if ((a->FileAlignment & -a->FileAlignment) != a->FileAlignment
|
||
|| a->FileAlignment > a->SectionAlignment)
|
||
{
|
||
const char **warn = _bfd_per_xvec_warn (abfd->xvec);
|
||
*warn = _("%pB: adjusting invalid FileAlignment");
|
||
a->FileAlignment &= -a->FileAlignment;
|
||
if (a->FileAlignment > a->SectionAlignment)
|
||
a->FileAlignment = a->SectionAlignment;
|
||
}
|
||
|
||
if (a->NumberOfRvaAndSizes > IMAGE_NUMBEROF_DIRECTORY_ENTRIES)
|
||
{
|
||
const char **warn = _bfd_per_xvec_warn (abfd->xvec);
|
||
*warn = _("%pB: invalid NumberOfRvaAndSizes");
|
||
}
|
||
}
|
||
|
||
result = coff_real_object_p (abfd, internal_f.f_nscns, &internal_f,
|
||
(opt_hdr_size != 0
|
||
? &internal_a
|
||
: (struct internal_aouthdr *) NULL));
|
||
|
||
if (result)
|
||
{
|
||
/* Now the whole header has been processed, see if there is a build-id */
|
||
pe_bfd_read_buildid(abfd);
|
||
}
|
||
|
||
return result;
|
||
}
|
||
|
||
#define coff_object_p pe_bfd_object_p
|
||
#endif /* COFF_IMAGE_WITH_PE */
|