2008-07-24 Bean <bean123ch@gmail.com>
* common.rmk (bin_UTILITIES): Add grub-pe2elf.
(grub_pe2elf_SOURCES): New macro.
(CLEANFILES): Add grub-pe2elf.
* include/grub/efi/pe32.h (GRUB_PE32_SCN_ALIGN_1BYTES): New constant.
(GRUB_PE32_SCN_ALIGN_2BYTES): Likewise.
(GRUB_PE32_SCN_ALIGN_4BYTES): Likewise.
(GRUB_PE32_SCN_ALIGN_8BYTES): Likewise.
(GRUB_PE32_SCN_ALIGN_16BYTES): Likewise.
(GRUB_PE32_SCN_ALIGN_32BYTES): Likewise.
(GRUB_PE32_SCN_ALIGN_64BYTES): Likewise.
(GRUB_PE32_SCN_ALIGN_SHIFT): Likewise.
(GRUB_PE32_SCN_ALIGN_MASK): Likewise.
(GRUB_PE32_SYM_CLASS_EXTERNAL): Likewise.
(GRUB_PE32_SYM_CLASS_STATIC): Likewise.
(GRUB_PE32_SYM_CLASS_FILE): Likewise.
(GRUB_PE32_DT_FUNCTION): Likewise.
(GRUB_PE32_REL_I386_DIR32): Likewise.
(GRUB_PE32_REL_I386_REL32): Likewise.
(grub_pe32_symbol): New structure.
(grub_pe32_reloc): Likewise.
* util/grub-pe2elf.c: New file.
* configure.ac: Set TARGET_OBJ2ELF if host os is cygwin. Don't test for
start symbol in non pc platform.
* genmk.rb: Use TARGET_OBJ2ELF to convert native object format to elf.
The following patches are from Christian Franke.
* include/grub/dl.h: Remove .previous, gas supports this only
for ELF format.
* include/grub/symbol.h [__CYGWIN__] (#define FUNCTION/VARIABLE):
Remove .type, gas supports this only for ELF format.
* kern/dl.c (grub_dl_resolve_dependencies): Add check for trailing
nullbytes in symbol table. This fixes an infinite loop if table is
zero filled.
* Makefile.in: Add autoconf replacements TARGET_IMG_LDSCRIPT,
TARGET_IMG_LDFLAGS and EXEEXT.
* aclocal.m4 (grub_PROG_OBJCOPY_ABSOLUTE): Replace -Wl,-N by
TARGET_IMG_LDFLAGS_AC.
(grub_CHECK_STACK_ARG_PROBE): New function.
* conf/i386-pc.rmk: Replace -Wl,-N by TARGET_IMG_LDFLAGS.
* conf/i386-pc-cygwin-ld-img.sc: New linker script.
* configure.ac: Add check for linker script "conf/${target}-img-ld.c"
to set TARGET_IMG_LD* accordingly.
Add check for Cygwin to set TARGET_MOD_OBJCOPY accordingly.
Add call to grub_CHECK_STACK_ARG_PROBE.
Use TARGET_IMG_LDFLAGS to check start, bss_start, end symbols.
* genkernsyms.sh.in: Handle HAVE_ASM_USCORE case.
* genmk.rb: Add EXEEXT to CLEANFILES.
This commit is contained in:
bean
parent
12ccdb75a9
commit
2a8a80e4f4
23 changed files with 1533 additions and 539 deletions
514
util/grub-pe2elf.c
Normal file
514
util/grub-pe2elf.c
Normal file
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@ -0,0 +1,514 @@
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/* grub-pe2elf.c - tool to convert pe image to elf. */
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/*
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* GRUB -- GRand Unified Bootloader
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* Copyright (C) 2008 Free Software Foundation, Inc.
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*
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* GRUB 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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*
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* GRUB 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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*
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* You should have received a copy of the GNU General Public License
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* along with GRUB. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <config.h>
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#include <grub/types.h>
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#include <grub/util/misc.h>
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#include <grub/elf.h>
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#include <grub/efi/pe32.h>
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#include <stdio.h>
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#include <unistd.h>
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#include <string.h>
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#include <stdlib.h>
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#include <getopt.h>
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static struct option options[] = {
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{"help", no_argument, 0, 'h'},
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{"version", no_argument, 0, 'V'},
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{"verbose", no_argument, 0, 'v'},
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{0, 0, 0, 0}
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};
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static void
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usage (int status)
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{
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if (status)
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fprintf (stderr, "Try ``grub-editenv --help'' for more information.\n");
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else
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printf ("\
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Usage: grub-editenv [OPTIONS] input [output]\n\
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\n\
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Tool to convert pe image to elf.\n\
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\nOptions:\n\
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-h, --help display this message and exit\n\
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-V, --version print version information and exit\n\
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-v, --verbose print verbose messages\n\
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\n\
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Report bugs to <%s>.\n", PACKAGE_BUGREPORT);
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exit (status);
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}
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/*
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* Section layout
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*
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* null
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* .text
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* .rdata
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* .data
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* .bss
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* .modname
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* .moddeps
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* .symtab
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* .strtab
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* relocation sections
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*/
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#define TEXT_SECTION 1
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#define RDATA_SECTION 2
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#define DATA_SECTION 3
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#define BSS_SECTION 4
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#define MODNAME_SECTION 5
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#define MODDEPS_SECTION 6
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#define SYMTAB_SECTION 7
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#define STRTAB_SECTION 8
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#define REL_SECTION 9
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#define MAX_SECTIONS 12
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#define STRTAB_BLOCK 256
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static char *strtab;
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static int strtab_max, strtab_len;
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Elf32_Ehdr ehdr;
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Elf32_Shdr shdr[MAX_SECTIONS];
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int num_sections;
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grub_uint32_t offset;
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static int
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insert_string (char *name)
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{
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int len, result;
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if (*name == '_')
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name++;
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len = strlen (name);
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if (strtab_len + len >= strtab_max)
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{
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strtab_max += STRTAB_BLOCK;
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strtab = xrealloc (strtab, strtab_max);
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}
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strcpy (strtab + strtab_len, name);
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result = strtab_len;
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strtab_len += len + 1;
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return result;
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}
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static int *
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write_section_data (FILE* fp, char *image,
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struct grub_pe32_coff_header *pe_chdr,
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struct grub_pe32_section_table *pe_shdr)
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{
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int *section_map;
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int i;
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section_map = xmalloc ((pe_chdr->num_sections + 1) * sizeof (int));
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section_map[0] = 0;
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for (i = 0; i < pe_chdr->num_sections; i++, pe_shdr++)
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{
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grub_uint32_t idx;
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if (! strcmp (pe_shdr->name, ".text"))
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{
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idx = TEXT_SECTION;
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shdr[idx].sh_flags = SHF_ALLOC | SHF_EXECINSTR;
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}
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else if (! strcmp (pe_shdr->name, ".rdata"))
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{
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idx = RDATA_SECTION;
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shdr[idx].sh_flags = SHF_ALLOC;
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}
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else if (! strcmp (pe_shdr->name, ".data"))
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{
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idx = DATA_SECTION;
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shdr[idx].sh_flags = SHF_ALLOC | SHF_WRITE;
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}
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else if (! strcmp (pe_shdr->name, ".bss"))
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{
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idx = BSS_SECTION;
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shdr[idx].sh_flags = SHF_ALLOC | SHF_WRITE;
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}
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else if (! strcmp (pe_shdr->name, ".modname"))
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idx = MODNAME_SECTION;
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else if (! strcmp (pe_shdr->name, ".moddeps"))
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idx = MODDEPS_SECTION;
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else
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{
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section_map[i + 1] = -1;
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continue;
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}
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section_map[i + 1] = idx;
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shdr[idx].sh_type = (idx == BSS_SECTION) ? SHT_NOBITS : SHT_PROGBITS;
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shdr[idx].sh_size = pe_shdr->raw_data_size;
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shdr[idx].sh_addralign = 1 << (((pe_shdr->characteristics >>
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GRUB_PE32_SCN_ALIGN_SHIFT) &
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GRUB_PE32_SCN_ALIGN_MASK) - 1);
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if (idx != BSS_SECTION)
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{
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shdr[idx].sh_offset = offset;
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grub_util_write_image_at (image + pe_shdr->raw_data_offset,
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pe_shdr->raw_data_size, offset, fp);
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offset += pe_shdr->raw_data_size;
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}
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if (pe_shdr->relocations_offset)
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{
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char name[5 + strlen (pe_shdr->name)];
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if (num_sections >= MAX_SECTIONS)
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grub_util_error ("Too many sections");
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sprintf (name, ".rel%s", pe_shdr->name);
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shdr[num_sections].sh_name = insert_string (name);
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shdr[num_sections].sh_link = i;
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shdr[num_sections].sh_info = idx;
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shdr[idx].sh_name = shdr[num_sections].sh_name + 4;
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num_sections++;
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}
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else
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shdr[idx].sh_name = insert_string (pe_shdr->name);
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}
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return section_map;
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}
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static void
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write_reloc_section (FILE* fp, char *image,
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struct grub_pe32_coff_header *pe_chdr,
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struct grub_pe32_section_table *pe_shdr,
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Elf32_Sym *symtab,
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int *symtab_map)
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{
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int i;
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for (i = REL_SECTION; i < num_sections; i++)
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{
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struct grub_pe32_section_table *pe_sec;
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struct grub_pe32_reloc *pe_rel;
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Elf32_Rel *rel;
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int num_rels, j, modified;
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pe_sec = pe_shdr + shdr[i].sh_link;
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pe_rel = (struct grub_pe32_reloc *) (image + pe_sec->relocations_offset);
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rel = (Elf32_Rel *) xmalloc (pe_sec->num_relocations * sizeof (Elf32_Rel));
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num_rels = 0;
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modified = 0;
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for (j = 0; j < pe_sec->num_relocations; j++, pe_rel++)
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{
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int type;
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grub_uint32_t ofs, *addr;
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if ((pe_rel->symtab_index >= pe_chdr->num_symbols) ||
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(symtab_map[pe_rel->symtab_index] == -1))
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grub_util_error ("Invalid symbol");
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if (pe_rel->type == GRUB_PE32_REL_I386_DIR32)
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type = R_386_32;
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else if (pe_rel->type == GRUB_PE32_REL_I386_REL32)
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type = R_386_PC32;
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else
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grub_util_error ("Unknown pe relocation type %d\n", pe_rel->type);
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ofs = pe_rel->offset - pe_sec->virtual_address;
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addr = (grub_uint32_t *)(image + pe_sec->raw_data_offset + ofs);
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if (type == R_386_PC32)
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{
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unsigned char code;
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code = image[pe_sec->raw_data_offset + ofs - 1];
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if (((code != 0xe8) && (code != 0xe9)) || (*addr))
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grub_util_error ("Invalid relocation (%x %x)", code, *addr);
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modified = 1;
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if (symtab[symtab_map[pe_rel->symtab_index]].st_shndx)
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{
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if (symtab[symtab_map[pe_rel->symtab_index]].st_shndx
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!= shdr[i].sh_info)
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grub_util_error ("Cross section call is not allowed");
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*addr = (symtab[symtab_map[pe_rel->symtab_index]].st_value
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- ofs - 4);
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continue;
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}
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else
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*addr = -4;
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}
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rel[num_rels].r_offset = ofs;
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rel[num_rels].r_info = ELF32_R_INFO (symtab_map[pe_rel->symtab_index],
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type);
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num_rels++;
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}
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if (modified)
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grub_util_write_image_at (image + pe_sec->raw_data_offset,
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shdr[shdr[i].sh_info].sh_size,
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shdr[shdr[i].sh_info].sh_offset,
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fp);
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shdr[i].sh_type = SHT_REL;
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shdr[i].sh_offset = offset;
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shdr[i].sh_link = SYMTAB_SECTION;
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shdr[i].sh_addralign = 4;
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shdr[i].sh_entsize = sizeof (Elf32_Rel);
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shdr[i].sh_size = num_rels * sizeof (Elf32_Rel);
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grub_util_write_image_at (rel, shdr[i].sh_size, offset, fp);
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offset += shdr[i].sh_size;
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free (rel);
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}
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}
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static void
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write_symbol_table (FILE* fp, char *image,
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struct grub_pe32_coff_header *pe_chdr,
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struct grub_pe32_section_table *pe_shdr,
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int *section_map)
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{
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struct grub_pe32_symbol *pe_symtab;
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char *pe_strtab;
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Elf32_Sym *symtab;
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int *symtab_map, num_syms;
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int i;
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pe_symtab = (struct grub_pe32_symbol *) (image + pe_chdr->symtab_offset);
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pe_strtab = (char *) (pe_symtab + pe_chdr->num_symbols);
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symtab = (Elf32_Sym *) xmalloc ((pe_chdr->num_symbols + 1) *
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sizeof (Elf32_Sym));
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memset (symtab, 0, (pe_chdr->num_symbols + 1) * sizeof (Elf32_Sym));
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num_syms = 1;
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symtab_map = (int *) xmalloc (pe_chdr->num_symbols * sizeof (int));
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for (i = 0; i < (int) pe_chdr->num_symbols;
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i += pe_symtab->num_aux + 1, pe_symtab += pe_symtab->num_aux + 1)
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{
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int bind, type;
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symtab_map[i] = -1;
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if ((pe_symtab->section > pe_chdr->num_sections) ||
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(section_map[pe_symtab->section] == -1))
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continue;
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if (! pe_symtab->section)
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type = STT_NOTYPE;
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else if (pe_symtab->type == GRUB_PE32_DT_FUNCTION)
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type = STT_FUNC;
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else
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type = STT_OBJECT;
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if (pe_symtab->storage_class == GRUB_PE32_SYM_CLASS_EXTERNAL)
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bind = STB_GLOBAL;
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else
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bind = STB_LOCAL;
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if ((type != STT_FUNC) && (pe_symtab->num_aux))
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{
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if (! pe_symtab->value)
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type = STT_SECTION;
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symtab[num_syms].st_name = shdr[section_map[pe_symtab->section]].sh_name;
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}
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else
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{
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char *name;
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name = ((pe_symtab->long_name[0]) ? pe_symtab->short_name :
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pe_strtab + pe_symtab->long_name[1]);
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if ((strcmp (name, "_grub_mod_init")) &&
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(strcmp (name, "_grub_mod_fini")) &&
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(bind == STB_LOCAL))
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continue;
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symtab[num_syms].st_name = insert_string (name);
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}
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symtab[num_syms].st_shndx = section_map[pe_symtab->section];
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symtab[num_syms].st_value = pe_symtab->value;
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symtab[num_syms].st_info = ELF32_ST_INFO (bind, type);
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symtab_map[i] = num_syms;
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num_syms++;
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}
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write_reloc_section (fp, image, pe_chdr, pe_shdr, symtab, symtab_map);
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shdr[SYMTAB_SECTION].sh_name = insert_string (".symtab");
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shdr[SYMTAB_SECTION].sh_type = SHT_SYMTAB;
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shdr[SYMTAB_SECTION].sh_offset = offset;
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shdr[SYMTAB_SECTION].sh_size = num_syms * sizeof (Elf32_Sym);
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shdr[SYMTAB_SECTION].sh_entsize = sizeof (Elf32_Sym);
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shdr[SYMTAB_SECTION].sh_link = STRTAB_SECTION;
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shdr[SYMTAB_SECTION].sh_addralign = 4;
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grub_util_write_image_at (symtab, shdr[SYMTAB_SECTION].sh_size,
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offset, fp);
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offset += shdr[SYMTAB_SECTION].sh_size;
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free (symtab);
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free (symtab_map);
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}
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static void
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write_string_table (FILE* fp)
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{
|
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shdr[STRTAB_SECTION].sh_name = insert_string (".strtab");
|
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shdr[STRTAB_SECTION].sh_type = SHT_STRTAB;
|
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shdr[STRTAB_SECTION].sh_offset = offset;
|
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shdr[STRTAB_SECTION].sh_size = strtab_len;
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shdr[STRTAB_SECTION].sh_addralign = 1;
|
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grub_util_write_image_at (strtab, strtab_len, offset, fp);
|
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offset += strtab_len;
|
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|
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free (strtab);
|
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}
|
||||
|
||||
static void
|
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write_section_header (FILE* fp)
|
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{
|
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ehdr.e_ident[EI_MAG0] = ELFMAG0;
|
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ehdr.e_ident[EI_MAG1] = ELFMAG1;
|
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ehdr.e_ident[EI_MAG2] = ELFMAG2;
|
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ehdr.e_ident[EI_MAG3] = ELFMAG3;
|
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ehdr.e_ident[EI_VERSION] = EV_CURRENT;
|
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ehdr.e_version = EV_CURRENT;
|
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ehdr.e_type = ET_REL;
|
||||
|
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ehdr.e_ident[EI_CLASS] = ELFCLASS32;
|
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ehdr.e_ident[EI_DATA] = ELFDATA2LSB;
|
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ehdr.e_machine = EM_386;
|
||||
|
||||
ehdr.e_ehsize = sizeof (ehdr);
|
||||
ehdr.e_shentsize = sizeof (Elf32_Shdr);
|
||||
ehdr.e_shstrndx = STRTAB_SECTION;
|
||||
|
||||
ehdr.e_shoff = offset;
|
||||
ehdr.e_shnum = num_sections;
|
||||
grub_util_write_image_at (&shdr, sizeof (Elf32_Shdr) * num_sections,
|
||||
offset, fp);
|
||||
|
||||
grub_util_write_image_at (&ehdr, sizeof (Elf32_Ehdr), 0, fp);
|
||||
}
|
||||
|
||||
static void
|
||||
convert_pe (FILE* fp, char *image)
|
||||
{
|
||||
struct grub_pe32_coff_header *pe_chdr;
|
||||
struct grub_pe32_section_table *pe_shdr;
|
||||
int *section_map;
|
||||
|
||||
pe_chdr = (struct grub_pe32_coff_header *) image;
|
||||
if (grub_le_to_cpu16 (pe_chdr->machine) != GRUB_PE32_MACHINE_I386)
|
||||
grub_util_error ("Invalid coff image");
|
||||
|
||||
strtab = xmalloc (STRTAB_BLOCK);
|
||||
strtab_max = STRTAB_BLOCK;
|
||||
strtab[0] = 0;
|
||||
strtab_len = 1;
|
||||
|
||||
offset = sizeof (ehdr);
|
||||
pe_shdr = (struct grub_pe32_section_table *) (pe_chdr + 1);
|
||||
num_sections = REL_SECTION;
|
||||
|
||||
section_map = write_section_data (fp, image, pe_chdr, pe_shdr);
|
||||
|
||||
write_symbol_table (fp, image, pe_chdr, pe_shdr, section_map);
|
||||
free (section_map);
|
||||
|
||||
write_string_table (fp);
|
||||
|
||||
write_section_header (fp);
|
||||
}
|
||||
|
||||
int
|
||||
main (int argc, char *argv[])
|
||||
{
|
||||
char *image;
|
||||
FILE* fp;
|
||||
|
||||
progname = "grub-pe2elf";
|
||||
|
||||
/* Check for options. */
|
||||
while (1)
|
||||
{
|
||||
int c = getopt_long (argc, argv, "hVv", options, 0);
|
||||
|
||||
if (c == -1)
|
||||
break;
|
||||
else
|
||||
switch (c)
|
||||
{
|
||||
case 'h':
|
||||
usage (0);
|
||||
break;
|
||||
|
||||
case 'V':
|
||||
printf ("%s (%s) %s\n", progname, PACKAGE_NAME, PACKAGE_VERSION);
|
||||
return 0;
|
||||
|
||||
case 'v':
|
||||
verbosity++;
|
||||
break;
|
||||
|
||||
default:
|
||||
usage (1);
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
/* Obtain PATH. */
|
||||
if (optind >= argc)
|
||||
{
|
||||
fprintf (stderr, "Filename not specified.\n");
|
||||
usage (1);
|
||||
}
|
||||
|
||||
image = grub_util_read_image (argv[optind]);
|
||||
|
||||
if (optind + 1 < argc)
|
||||
optind++;
|
||||
|
||||
fp = fopen (argv[optind], "wb");
|
||||
if (! fp)
|
||||
grub_util_error ("cannot open %s", argv[optind]);
|
||||
|
||||
convert_pe (fp, image);
|
||||
|
||||
fclose (fp);
|
||||
|
||||
return 0;
|
||||
}
|
||||
Loading…
Add table
Add a link
Reference in a new issue