mirror of
https://sourceware.org/git/binutils-gdb.git
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07d6d2b834
Binutils is supposed to use tabs. In my git config I have whitespace = indent-with-non-tab,space-before-tab,trailing-space and I got annoyed enough seeing red in "git diff" output to fix the problems. * doc/header.sed: Trim trailing space when splitting lines. * aix386-core.c, * aout-adobe.c, * aout-arm.c, * aout-cris.c, * aout-ns32k.c, * aout-target.h, * aout-tic30.c, * aoutf1.h, * aoutx.h, * arc-got.h, * arc-plt.def, * arc-plt.h, * archive.c, * archive64.c, * archures.c, * armnetbsd.c, * bfd-in.h, * bfd.c, * bfdio.c, * binary.c, * bout.c, * cache.c, * cisco-core.c, * coff-alpha.c, * coff-apollo.c, * coff-arm.c, * coff-h8300.c, * coff-i386.c, * coff-i860.c, * coff-i960.c, * coff-m68k.c, * coff-m88k.c, * coff-mcore.c, * coff-mips.c, * coff-ppc.c, * coff-rs6000.c, * coff-sh.c, * coff-stgo32.c, * coff-tic4x.c, * coff-tic54x.c, * coff-tic80.c, * coff-we32k.c, * coff-x86_64.c, * coff-z80.c, * coff-z8k.c, * coff64-rs6000.c, * coffcode.h, * coffgen.c, * cofflink.c, * coffswap.h, * compress.c, * corefile.c, * cpu-alpha.c, * cpu-arm.c, * cpu-avr.c, * cpu-bfin.c, * cpu-cr16.c, * cpu-cr16c.c, * cpu-crx.c, * cpu-d10v.c, * cpu-frv.c, * cpu-ft32.c, * cpu-i370.c, * cpu-i960.c, * cpu-ia64-opc.c, * cpu-ip2k.c, * cpu-lm32.c, * cpu-m32r.c, * cpu-mcore.c, * cpu-microblaze.c, * cpu-mips.c, * cpu-moxie.c, * cpu-mt.c, * cpu-nios2.c, * cpu-ns32k.c, * cpu-or1k.c, * cpu-powerpc.c, * cpu-pru.c, * cpu-sh.c, * cpu-spu.c, * cpu-v850.c, * cpu-v850_rh850.c, * cpu-xgate.c, * cpu-z80.c, * dwarf1.c, * dwarf2.c, * ecoff.c, * ecofflink.c, * ecoffswap.h, * elf-bfd.h, * elf-eh-frame.c, * elf-hppa.h, * elf-m10200.c, * elf-m10300.c, * elf-s390-common.c, * elf-strtab.c, * elf-vxworks.c, * elf.c, * elf32-am33lin.c, * elf32-arc.c, * elf32-arm.c, * elf32-avr.c, * elf32-avr.h, * elf32-bfin.c, * elf32-cr16.c, * elf32-cr16c.c, * elf32-cris.c, * elf32-crx.c, * elf32-d10v.c, * elf32-d30v.c, * elf32-dlx.c, * elf32-epiphany.c, * elf32-fr30.c, * elf32-frv.c, * elf32-ft32.c, * elf32-h8300.c, * elf32-hppa.c, * elf32-i386.c, * elf32-i860.c, * elf32-i960.c, * elf32-ip2k.c, * elf32-lm32.c, * elf32-m32c.c, * elf32-m32r.c, * elf32-m68hc11.c, * elf32-m68hc12.c, * elf32-m68hc1x.c, * elf32-m68hc1x.h, * elf32-m68k.c, * elf32-m88k.c, * elf32-mcore.c, * elf32-mep.c, * elf32-metag.c, * elf32-microblaze.c, * elf32-mips.c, * elf32-moxie.c, * elf32-msp430.c, * elf32-mt.c, * elf32-nds32.c, * elf32-nds32.h, * elf32-nios2.c, * elf32-or1k.c, * elf32-pj.c, * elf32-ppc.c, * elf32-ppc.h, * elf32-pru.c, * elf32-rl78.c, * elf32-rx.c, * elf32-s390.c, * elf32-score.c, * elf32-score.h, * elf32-score7.c, * elf32-sh-symbian.c, * elf32-sh.c, * elf32-sh64.c, * elf32-sparc.c, * elf32-spu.c, * elf32-tic6x.c, * elf32-tilegx.c, * elf32-tilegx.h, * elf32-tilepro.c, * elf32-tilepro.h, * elf32-v850.c, * elf32-vax.c, * elf32-wasm32.c, * elf32-xc16x.c, * elf32-xgate.c, * elf32-xgate.h, * elf32-xstormy16.c, * elf32-xtensa.c, * elf64-alpha.c, * elf64-hppa.c, * elf64-ia64-vms.c, * elf64-mips.c, * elf64-mmix.c, * elf64-ppc.c, * elf64-s390.c, * elf64-sh64.c, * elf64-sparc.c, * elf64-tilegx.c, * elf64-tilegx.h, * elf64-x86-64.c, * elfcore.h, * elflink.c, * elfn32-mips.c, * elfnn-aarch64.c, * elfnn-ia64.c, * elfnn-riscv.c, * elfxx-aarch64.c, * elfxx-aarch64.h, * elfxx-ia64.c, * elfxx-ia64.h, * elfxx-mips.c, * elfxx-riscv.c, * elfxx-sparc.c, * elfxx-tilegx.c, * elfxx-x86.c, * elfxx-x86.h, * freebsd.h, * hash.c, * host-aout.c, * hp300hpux.c, * hppabsd-core.c, * hpux-core.c, * i386aout.c, * i386linux.c, * i386lynx.c, * i386mach3.c, * i386msdos.c, * i386netbsd.c, * ieee.c, * ihex.c, * irix-core.c, * libaout.h, * libbfd-in.h, * libbfd.c, * libcoff-in.h, * libnlm.h, * libpei.h, * libxcoff.h, * linker.c, * lynx-core.c, * m68k4knetbsd.c, * m68klinux.c, * m68knetbsd.c, * m88kmach3.c, * mach-o-aarch64.c, * mach-o-arm.c, * mach-o-i386.c, * mach-o-target.c, * mach-o-x86-64.c, * mach-o.c, * mach-o.h, * merge.c, * mipsbsd.c, * mmo.c, * netbsd.h, * netbsd-core.c, * newsos3.c, * nlm-target.h, * nlm32-ppc.c, * nlm32-sparc.c, * nlmcode.h, * ns32k.h, * ns32knetbsd.c, * oasys.c, * opncls.c, * pc532-mach.c, * pdp11.c, * pe-arm.c, * pe-i386.c, * pe-mcore.c, * pe-mips.c, * pe-x86_64.c, * peXXigen.c, * pef.c, * pef.h, * pei-arm.c, * pei-i386.c, * pei-mcore.c, * pei-x86_64.c, * peicode.h, * plugin.c, * ppcboot.c, * ptrace-core.c, * reloc.c, * riscix.c, * rs6000-core.c, * section.c, * som.c, * som.h, * sparclinux.c, * sparcnetbsd.c, * srec.c, * stabs.c, * sunos.c, * syms.c, * targets.c, * tekhex.c, * trad-core.c, * vax1knetbsd.c, * vaxnetbsd.c, * verilog.c, * versados.c, * vms-alpha.c, * vms-lib.c, * vms-misc.c, * wasm-module.c, * wasm-module.h, * xcofflink.c, * xsym.c, * xsym.h: Whitespace fixes. * bfd-in2.h, * libbfd.h, * libcoff.h: Regenerate.
425 lines
13 KiB
C
425 lines
13 KiB
C
/* BFD back-end for Intel 386 COFF files (DJGPP variant with a stub).
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Copyright (C) 1997-2017 Free Software Foundation, Inc.
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Written by Robert Hoehne.
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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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/* This file handles now also stubbed coff images. The stub is a small
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DOS executable program before the coff image to load it in memory
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and execute it. This is needed, because DOS cannot run coff files.
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All the functions below are called by the corresponding functions
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from coffswap.h.
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The only thing what they do is to adjust the information stored in
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the COFF file which are offset into the file.
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This is needed, because DJGPP uses a very special way to load and run
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the coff image. It loads the image in memory and assumes then, that the
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image had no stub by using the filepointers as pointers in the coff
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image and NOT in the file.
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To be compatible with any existing executables I have fixed this
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here and NOT in the DJGPP startup code. */
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#define TARGET_SYM i386_coff_go32stubbed_vec
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#define TARGET_NAME "coff-go32-exe"
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#define TARGET_UNDERSCORE '_'
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#define COFF_GO32_EXE
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#define COFF_LONG_SECTION_NAMES
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#define COFF_SUPPORT_GNU_LINKONCE
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#define COFF_LONG_FILENAMES
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#define COFF_SECTION_ALIGNMENT_ENTRIES \
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{ COFF_SECTION_NAME_EXACT_MATCH (".data"), \
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COFF_ALIGNMENT_FIELD_EMPTY, COFF_ALIGNMENT_FIELD_EMPTY, 4 }, \
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{ COFF_SECTION_NAME_EXACT_MATCH (".text"), \
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COFF_ALIGNMENT_FIELD_EMPTY, COFF_ALIGNMENT_FIELD_EMPTY, 4 }, \
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{ COFF_SECTION_NAME_PARTIAL_MATCH (".debug"), \
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COFF_ALIGNMENT_FIELD_EMPTY, COFF_ALIGNMENT_FIELD_EMPTY, 0 }, \
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{ COFF_SECTION_NAME_PARTIAL_MATCH (".gnu.linkonce.wi"), \
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COFF_ALIGNMENT_FIELD_EMPTY, COFF_ALIGNMENT_FIELD_EMPTY, 0 }
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#include "sysdep.h"
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#include "bfd.h"
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/* All that ..._PRE and ...POST functions are called from the corresponding
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coff_swap... functions. The ...PRE functions are called at the beginning
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of the function and the ...POST functions at the end of the swap routines. */
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static void
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adjust_filehdr_in_post (bfd *, void *, void *);
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static void
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adjust_filehdr_out_pre (bfd *, void *, void *);
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static void
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adjust_filehdr_out_post (bfd *, void *, void *);
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static void
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adjust_scnhdr_in_post (bfd *, void *, void *);
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static void
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adjust_scnhdr_out_pre (bfd *, void *, void *);
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static void
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adjust_scnhdr_out_post (bfd *, void *, void *);
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static void
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adjust_aux_in_post (bfd *, void *, int, int, int, int, void *);
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static void
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adjust_aux_out_pre (bfd *, void *, int, int, int, int, void *);
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static void
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adjust_aux_out_post (bfd *, void *, int, int, int, int, void *);
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static void
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create_go32_stub (bfd *);
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#define COFF_ADJUST_FILEHDR_IN_POST adjust_filehdr_in_post
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#define COFF_ADJUST_FILEHDR_OUT_PRE adjust_filehdr_out_pre
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#define COFF_ADJUST_FILEHDR_OUT_POST adjust_filehdr_out_post
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#define COFF_ADJUST_SCNHDR_IN_POST adjust_scnhdr_in_post
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#define COFF_ADJUST_SCNHDR_OUT_PRE adjust_scnhdr_out_pre
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#define COFF_ADJUST_SCNHDR_OUT_POST adjust_scnhdr_out_post
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#define COFF_ADJUST_AUX_IN_POST adjust_aux_in_post
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#define COFF_ADJUST_AUX_OUT_PRE adjust_aux_out_pre
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#define COFF_ADJUST_AUX_OUT_POST adjust_aux_out_post
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static const bfd_target *go32_check_format (bfd *);
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#define COFF_CHECK_FORMAT go32_check_format
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static bfd_boolean
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go32_stubbed_coff_bfd_copy_private_bfd_data (bfd *, bfd *);
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#define coff_bfd_copy_private_bfd_data go32_stubbed_coff_bfd_copy_private_bfd_data
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#include "coff-i386.c"
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/* This macro is used, because I cannot assume the endianness of the
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host system. */
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#define _H(index) (H_GET_16 (abfd, (header + index * 2)))
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/* These bytes are a 2048-byte DOS executable, which loads the COFF
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image into memory and then runs it. It is called 'stub'. */
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static const unsigned char stub_bytes[GO32_STUBSIZE] =
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{
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#include "go32stub.h"
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};
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/*
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I have not commented each swap function below, because the
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technique is in any function the same. For the ...in function,
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all the pointers are adjusted by adding GO32_STUBSIZE and for the
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...out function, it is subtracted first and after calling the
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standard swap function it is reset to the old value. */
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/* This macro is used for adjusting the filepointers, which
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is done only, if the pointer is nonzero. */
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#define ADJUST_VAL(val,diff) \
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if (val != 0) val += diff
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static void
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adjust_filehdr_in_post (bfd * abfd ATTRIBUTE_UNUSED,
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void * src,
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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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ADJUST_VAL (filehdr_dst->f_symptr, GO32_STUBSIZE);
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/* Save now the stub to be used later. Put the stub data to FILEHDR_DST
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first as coff_data (abfd) still does not exist. It may not even be ever
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created as we are just checking the file format of ABFD. */
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memcpy (filehdr_dst->go32stub, filehdr_src->stub, GO32_STUBSIZE);
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filehdr_dst->f_flags |= F_GO32STUB;
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}
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static void
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adjust_filehdr_out_pre (bfd * abfd, void * in, void * out)
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{
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struct internal_filehdr *filehdr_in = (struct internal_filehdr *) in;
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FILHDR *filehdr_out = (FILHDR *) out;
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/* Generate the stub. */
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create_go32_stub (abfd);
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/* Copy the stub to the file header. */
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if (coff_data (abfd)->go32stub != NULL)
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memcpy (filehdr_out->stub, coff_data (abfd)->go32stub, GO32_STUBSIZE);
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else
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/* Use the default. */
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memcpy (filehdr_out->stub, stub_bytes, GO32_STUBSIZE);
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ADJUST_VAL (filehdr_in->f_symptr, -GO32_STUBSIZE);
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}
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static void
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adjust_filehdr_out_post (bfd * abfd ATTRIBUTE_UNUSED,
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void * in,
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void * out ATTRIBUTE_UNUSED)
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{
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struct internal_filehdr *filehdr_in = (struct internal_filehdr *) in;
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/* Undo the above change. */
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ADJUST_VAL (filehdr_in->f_symptr, GO32_STUBSIZE);
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}
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static void
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adjust_scnhdr_in_post (bfd * abfd ATTRIBUTE_UNUSED,
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void * ext ATTRIBUTE_UNUSED,
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void * in)
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{
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struct internal_scnhdr *scnhdr_int = (struct internal_scnhdr *) in;
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ADJUST_VAL (scnhdr_int->s_scnptr, GO32_STUBSIZE);
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ADJUST_VAL (scnhdr_int->s_relptr, GO32_STUBSIZE);
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ADJUST_VAL (scnhdr_int->s_lnnoptr, GO32_STUBSIZE);
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}
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static void
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adjust_scnhdr_out_pre (bfd * abfd ATTRIBUTE_UNUSED,
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void * in,
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void * out ATTRIBUTE_UNUSED)
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{
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struct internal_scnhdr *scnhdr_int = (struct internal_scnhdr *) in;
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ADJUST_VAL (scnhdr_int->s_scnptr, -GO32_STUBSIZE);
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ADJUST_VAL (scnhdr_int->s_relptr, -GO32_STUBSIZE);
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ADJUST_VAL (scnhdr_int->s_lnnoptr, -GO32_STUBSIZE);
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}
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static void
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adjust_scnhdr_out_post (bfd * abfd ATTRIBUTE_UNUSED,
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void * in,
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void * out ATTRIBUTE_UNUSED)
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{
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struct internal_scnhdr *scnhdr_int = (struct internal_scnhdr *) in;
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ADJUST_VAL (scnhdr_int->s_scnptr, GO32_STUBSIZE);
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ADJUST_VAL (scnhdr_int->s_relptr, GO32_STUBSIZE);
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ADJUST_VAL (scnhdr_int->s_lnnoptr, GO32_STUBSIZE);
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}
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static void
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adjust_aux_in_post (bfd * abfd ATTRIBUTE_UNUSED,
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void * ext1 ATTRIBUTE_UNUSED,
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int type,
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int in_class,
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int indx ATTRIBUTE_UNUSED,
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int numaux ATTRIBUTE_UNUSED,
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void * in1)
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{
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union internal_auxent *in = (union internal_auxent *) in1;
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if (in_class == C_BLOCK || in_class == C_FCN || ISFCN (type)
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|| ISTAG (in_class))
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{
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ADJUST_VAL (in->x_sym.x_fcnary.x_fcn.x_lnnoptr, GO32_STUBSIZE);
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}
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}
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static void
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adjust_aux_out_pre (bfd *abfd ATTRIBUTE_UNUSED,
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void * inp,
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int type,
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int in_class,
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int indx ATTRIBUTE_UNUSED,
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int numaux ATTRIBUTE_UNUSED,
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void * extp ATTRIBUTE_UNUSED)
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{
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union internal_auxent *in = (union internal_auxent *) inp;
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if (in_class == C_BLOCK || in_class == C_FCN || ISFCN (type)
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|| ISTAG (in_class))
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{
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ADJUST_VAL (in->x_sym.x_fcnary.x_fcn.x_lnnoptr, -GO32_STUBSIZE);
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}
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}
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static void
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adjust_aux_out_post (bfd *abfd ATTRIBUTE_UNUSED,
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void * inp,
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int type,
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int in_class,
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int indx ATTRIBUTE_UNUSED,
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int numaux ATTRIBUTE_UNUSED,
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void * extp ATTRIBUTE_UNUSED)
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{
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union internal_auxent *in = (union internal_auxent *) inp;
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if (in_class == C_BLOCK || in_class == C_FCN || ISFCN (type)
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|| ISTAG (in_class))
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{
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ADJUST_VAL (in->x_sym.x_fcnary.x_fcn.x_lnnoptr, GO32_STUBSIZE);
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}
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}
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/* That's the function, which creates the stub. There are
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different cases from where the stub is taken.
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At first the environment variable $(GO32STUB) is checked and then
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$(STUB) if it was not set.
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If it exists and points to a valid stub the stub is taken from
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that file. This file can be also a whole executable file, because
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the stub is computed from the exe information at the start of that
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file.
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If there was any error, the standard stub (compiled in this file)
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is taken. */
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static void
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create_go32_stub (bfd *abfd)
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{
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/* Do it only once. */
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if (coff_data (abfd)->go32stub == NULL)
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{
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char *stub;
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struct stat st;
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int f;
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unsigned char header[10];
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char magic[8];
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unsigned long coff_start;
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long exe_start;
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/* Check at first the environment variable $(GO32STUB). */
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stub = getenv ("GO32STUB");
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/* Now check the environment variable $(STUB). */
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if (stub == NULL)
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stub = getenv ("STUB");
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if (stub == NULL)
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goto stub_end;
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if (stat (stub, &st) != 0)
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goto stub_end;
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#ifdef O_BINARY
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f = open (stub, O_RDONLY | O_BINARY);
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#else
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f = open (stub, O_RDONLY);
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#endif
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if (f < 0)
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goto stub_end;
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if (read (f, &header, sizeof (header)) < 0)
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{
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close (f);
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goto stub_end;
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}
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if (_H (0) != 0x5a4d) /* It is not an exe file. */
|
|
{
|
|
close (f);
|
|
goto stub_end;
|
|
}
|
|
/* Compute the size of the stub (it is every thing up
|
|
to the beginning of the coff image). */
|
|
coff_start = (long) _H (2) * 512L;
|
|
if (_H (1))
|
|
coff_start += (long) _H (1) - 512L;
|
|
|
|
/* Currently there is only a fixed stub size of 2048 bytes
|
|
supported. */
|
|
if (coff_start != 2048)
|
|
{
|
|
close (f);
|
|
goto stub_end;
|
|
}
|
|
exe_start = _H (4) * 16;
|
|
if ((long) lseek (f, exe_start, SEEK_SET) != exe_start)
|
|
{
|
|
close (f);
|
|
goto stub_end;
|
|
}
|
|
if (read (f, &magic, 8) != 8)
|
|
{
|
|
close (f);
|
|
goto stub_end;
|
|
}
|
|
if (! CONST_STRNEQ (magic, "go32stub"))
|
|
{
|
|
close (f);
|
|
goto stub_end;
|
|
}
|
|
/* Now we found a correct stub (hopefully). */
|
|
coff_data (abfd)->go32stub = bfd_alloc (abfd, (bfd_size_type) coff_start);
|
|
if (coff_data (abfd)->go32stub == NULL)
|
|
{
|
|
close (f);
|
|
return;
|
|
}
|
|
lseek (f, 0L, SEEK_SET);
|
|
if ((unsigned long) read (f, coff_data (abfd)->go32stub, coff_start)
|
|
!= coff_start)
|
|
{
|
|
bfd_release (abfd, coff_data (abfd)->go32stub);
|
|
coff_data (abfd)->go32stub = NULL;
|
|
}
|
|
close (f);
|
|
}
|
|
stub_end:
|
|
/* There was something wrong above, so use now the standard builtin
|
|
stub. */
|
|
if (coff_data (abfd)->go32stub == NULL)
|
|
{
|
|
coff_data (abfd)->go32stub
|
|
= bfd_alloc (abfd, (bfd_size_type) GO32_STUBSIZE);
|
|
if (coff_data (abfd)->go32stub == NULL)
|
|
return;
|
|
memcpy (coff_data (abfd)->go32stub, stub_bytes, GO32_STUBSIZE);
|
|
}
|
|
}
|
|
|
|
/* If ibfd was a stubbed coff image, copy the stub from that bfd
|
|
to the new obfd. */
|
|
|
|
static bfd_boolean
|
|
go32_stubbed_coff_bfd_copy_private_bfd_data (bfd *ibfd, bfd *obfd)
|
|
{
|
|
/* Check if both are the same targets. */
|
|
if (ibfd->xvec != obfd->xvec)
|
|
return TRUE;
|
|
|
|
/* Check if we have a source stub. */
|
|
if (coff_data (ibfd)->go32stub == NULL)
|
|
return TRUE;
|
|
|
|
/* As adjust_filehdr_out_pre may get called only after this function,
|
|
optionally allocate the output stub. */
|
|
if (coff_data (obfd)->go32stub == NULL)
|
|
coff_data (obfd)->go32stub = bfd_alloc (obfd,
|
|
(bfd_size_type) GO32_STUBSIZE);
|
|
|
|
/* Now copy the stub. */
|
|
if (coff_data (obfd)->go32stub != NULL)
|
|
memcpy (coff_data (obfd)->go32stub, coff_data (ibfd)->go32stub,
|
|
GO32_STUBSIZE);
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
/* coff_object_p only checks 2 bytes F_MAGIC at GO32_STUBSIZE inside the file
|
|
which is too fragile. */
|
|
|
|
static const bfd_target *
|
|
go32_check_format (bfd *abfd)
|
|
{
|
|
char mz[2];
|
|
|
|
if (bfd_bread (mz, 2, abfd) != 2 || mz[0] != 'M' || mz[1] != 'Z')
|
|
{
|
|
bfd_set_error (bfd_error_wrong_format);
|
|
return NULL;
|
|
}
|
|
|
|
if (bfd_seek (abfd, 0, SEEK_SET) != 0)
|
|
return NULL;
|
|
|
|
return coff_object_p (abfd);
|
|
}
|