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grub/util/ia64/efi/elf2pe.c

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/* elf2pe.c - convert elf binary to PE/Coff. */
/*
* GRUB -- GRand Unified Bootloader
* Copyright (C) 2008 Free Software Foundation, Inc.
*
* GRUB is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* GRUB is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with GRUB. If not, see <http://www.gnu.org/licenses/>.
*/
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <elf.h>
#if defined(i386)
#define USE_ELF32
#define USE_PE32
#define ELF_MACHINE EM_386
#define EFI_MACHINE PE32_MACHINE_I386
#elif defined(__ia64__)
#define USE_ELF64
#define USE_PE32PLUS
#define ELF_MACHINE EM_IA_64
#define EFI_MACHINE PE32_MACHINE_IA64
#else
#error "unknown architecture"
#endif
#include "pe32.h"
const char *filename;
int
is_elf_header(uint8_t *buffer)
{
return (buffer[EI_MAG0] == ELFMAG0
&& buffer[EI_MAG1] == ELFMAG1
&& buffer[EI_MAG2] == ELFMAG2
&& buffer[EI_MAG3] == ELFMAG3);
}
#ifdef USE_ELF32
typedef Elf32_Shdr Elf_Shdr;
typedef Elf32_Ehdr Elf_Ehdr;
typedef Elf32_Rel Elf_Rel;
typedef Elf32_Rela Elf_Rela;
typedef Elf32_Sym Elf_Sym;
#define ELFCLASS ELFCLASS32
#define ELF_R_TYPE(r) ELF32_R_TYPE(r)
#define ELF_R_SYM(r) ELF32_R_SYM(r)
#else
typedef Elf64_Shdr Elf_Shdr;
typedef Elf64_Ehdr Elf_Ehdr;
typedef Elf64_Rel Elf_Rel;
typedef Elf64_Rela Elf_Rela;
typedef Elf64_Sym Elf_Sym;
#define ELFCLASS ELFCLASS64
#define ELF_R_TYPE(r) ELF64_R_TYPE(r)
#define ELF_R_SYM(r) ELF64_R_SYM(r)
#endif
#ifdef __ia64__
#define ELF_ETYPE ET_DYN
#else
#define ELF_ETYPE ET_EXEC
#endif
/* Well known ELF structures. */
Elf_Ehdr *ehdr;
Elf_Shdr *shdr_base;
Elf_Shdr *shdr_dynamic;
const uint8_t *shdr_str;
/* PE section alignment. */
const uint32_t coff_alignment = 0x20;
const uint32_t coff_nbr_sections = 4;
/* Current offset in coff file. */
uint32_t coff_offset;
/* Result Coff file in memory. */
uint8_t *coff_file;
/* Offset in Coff file of headers and sections. */
uint32_t nt_hdr_offset;
uint32_t table_offset;
uint32_t text_offset;
uint32_t data_offset;
uint32_t reloc_offset;
#ifdef __ia64__
uint32_t coff_entry_descr_offset;
uint32_t coff_entry_descr_func;
uint64_t plt_base;
#endif
/* ELF sections to offset in Coff file. */
uint32_t *coff_sections_offset;
struct pe32_fixup_block *coff_base_rel;
uint16_t *coff_entry_rel;
uint32_t
coff_align(uint32_t offset)
{
return (offset + coff_alignment - 1) & ~(coff_alignment - 1);
}
Elf_Shdr *
get_shdr_by_index(uint32_t num)
{
if (num >= ehdr->e_shnum)
return NULL;
return (Elf_Shdr*)((uint8_t*)shdr_base + num * ehdr->e_shentsize);
}
int
check_elf_header (void)
{
/* Note: Magic has already been tested. */
if (ehdr->e_ident[EI_CLASS] != ELFCLASS)
return 0;
if (ehdr->e_ident[EI_DATA] != ELFDATA2LSB)
return 0;
if (ehdr->e_type != ELF_ETYPE)
return 0;
if (ehdr->e_machine != ELF_MACHINE)
return 0;
if (ehdr->e_version != EV_CURRENT)
return 0;
shdr_base = (Elf_Shdr *)((uint8_t *)ehdr + ehdr->e_shoff);
coff_sections_offset =
(uint32_t *)malloc (ehdr->e_shnum * sizeof (uint32_t));
memset (coff_sections_offset, 0, ehdr->e_shnum * sizeof(uint32_t));
if (ehdr->e_shstrndx != SHN_UNDEF)
shdr_str = (uint8_t*)ehdr + shdr_base[ehdr->e_shstrndx].sh_offset;
else
shdr_str = NULL;
return 1;
}
int
is_text_shdr (Elf_Shdr *shdr)
{
if (shdr->sh_type != SHT_PROGBITS) {
return 0;
}
#ifdef __ia64__
return (shdr->sh_flags & (SHF_EXECINSTR | SHF_ALLOC))
== (SHF_ALLOC | SHF_EXECINSTR);
#else
return (shdr->sh_flags & (SHF_WRITE | SHF_ALLOC)) == SHF_ALLOC;
#endif
}
int
is_data_shdr (Elf_Shdr *shdr)
{
if (shdr->sh_type != SHT_PROGBITS && shdr->sh_type != SHT_NOBITS) {
return 0;
}
return (shdr->sh_flags & (SHF_WRITE | SHF_ALLOC)) == (SHF_ALLOC | SHF_WRITE);
}
void
create_section_header (const char *name, uint32_t offset, uint32_t size,
uint32_t flags)
{
struct pe32_section_header *hdr;
hdr = (struct pe32_section_header*)(coff_file + table_offset);
strcpy (hdr->name, name);
hdr->virtual_size = size;
hdr->virtual_address = offset;
hdr->raw_data_size = size;
hdr->raw_data_offset = offset;
hdr->relocations_offset = 0;
hdr->line_numbers_offset = 0;
hdr->num_relocations = 0;
hdr->num_line_numbers = 0;
hdr->characteristics = flags;
table_offset += sizeof (struct pe32_section_header);
}
int
scan_sections (void)
{
uint32_t i;
struct pe32_dos_header *doshdr;
struct pe32_nt_header *nt_hdr;
uint32_t coff_entry = 0;
int status = 0;
coff_offset = 0;
/* Coff file start with a DOS header. */
coff_offset = sizeof(struct pe32_dos_header);
nt_hdr_offset = coff_offset;
coff_offset += sizeof(struct pe32_nt_header);
table_offset = coff_offset;
coff_offset += coff_nbr_sections * sizeof(struct pe32_section_header);
/* First text sections. */
coff_offset = coff_align(coff_offset);
text_offset = coff_offset;
for (i = 0; i < ehdr->e_shnum; i++) {
Elf_Shdr *shdr = get_shdr_by_index (i);
if (is_text_shdr (shdr)) {
/* Relocate entry. */
if (ehdr->e_entry >= shdr->sh_addr
&& ehdr->e_entry < shdr->sh_addr + shdr->sh_size) {
coff_entry = coff_offset + ehdr->e_entry - shdr->sh_addr;
}
coff_sections_offset[i] = coff_offset;
coff_offset += shdr->sh_size;
#ifdef __ia64__
if (coff_sections_offset[i] != shdr->sh_addr) {
fprintf (stderr,
"Section %s: Coff offset (%x) != Elf offset (%lx)",
shdr_str + shdr->sh_name,
coff_sections_offset[i],
shdr->sh_addr);
status = -1;
}
#endif
}
if (shdr->sh_type == SHT_DYNAMIC) {
shdr_dynamic = shdr;
}
}
#ifdef __ia64__
/* 16 bytes are reserved (by the ld script) for the entry point descriptor.
*/
coff_entry_descr_offset = coff_offset - 16;
#endif
coff_offset = coff_align (coff_offset);
/* Then data sections. */
data_offset = coff_offset;
for (i = 0; i < ehdr->e_shnum; i++) {
Elf_Shdr *shdr = get_shdr_by_index (i);
if (is_data_shdr (shdr)) {
coff_sections_offset[i] = coff_offset;
coff_offset += shdr->sh_size;
#ifdef __ia64__
if (coff_sections_offset[i] != shdr->sh_addr) {
fprintf (stderr,
"Section %s: Coff offset (%x) != Elf offset (%lx)",
shdr_str + shdr->sh_name,
coff_sections_offset[i],
shdr->sh_addr);
status = -1;
}
#endif
}
}
coff_offset = coff_align (coff_offset);
reloc_offset = coff_offset;
/* Allocate base Coff file. Will be expanded later for relocations. */
coff_file = (uint8_t *)malloc (coff_offset);
memset (coff_file, 0, coff_offset);
/* Fill headers. */
doshdr = (struct pe32_dos_header *)coff_file;
doshdr->magic = 0x5A4D;
doshdr->new_hdr_offset = nt_hdr_offset;
nt_hdr = (struct pe32_nt_header*)(coff_file + nt_hdr_offset);
memcpy (nt_hdr->signature, "PE\0", 4);
nt_hdr->coff_header.machine = EFI_MACHINE;
nt_hdr->coff_header.num_sections = coff_nbr_sections;
nt_hdr->coff_header.time = time (NULL);
nt_hdr->coff_header.symtab_offset = 0;
nt_hdr->coff_header.num_symbols = 0;
nt_hdr->coff_header.optional_header_size = sizeof(nt_hdr->optional_header);
nt_hdr->coff_header.characteristics = PE32_EXECUTABLE_IMAGE
| PE32_LINE_NUMS_STRIPPED
| PE32_LOCAL_SYMS_STRIPPED
| PE32_32BIT_MACHINE;
#ifdef USE_PE32
nt_hdr->optional_header.magic = PE32_PE32_MAGIC;
#else
nt_hdr->optional_header.magic = PE32_PE64_MAGIC;
#endif
nt_hdr->optional_header.code_size = data_offset - text_offset;
nt_hdr->optional_header.data_size = reloc_offset - data_offset;
nt_hdr->optional_header.bss_size = 0;
#ifdef __ia64__
nt_hdr->optional_header.entry_addr = coff_entry_descr_offset;
coff_entry_descr_func = coff_entry;
#else
nt_hdr->optional_header.entry_addr = coff_entry;
#endif
nt_hdr->optional_header.code_base = text_offset;
#ifdef USE_PE32
nt_hdr->optional_header.data_base = data_offset;
#endif
nt_hdr->optional_header.image_base = 0;
nt_hdr->optional_header.section_alignment = coff_alignment;
nt_hdr->optional_header.file_alignment = coff_alignment;
nt_hdr->optional_header.image_size = 0;
nt_hdr->optional_header.header_size = text_offset;
nt_hdr->optional_header.num_data_directories = PE32_NUM_DATA_DIRECTORIES;
/* Section headers. */
create_section_header (".text", text_offset, data_offset - text_offset,
PE32_SCN_CNT_CODE
| PE32_SCN_MEM_EXECUTE
| PE32_SCN_MEM_READ);
create_section_header (".data", data_offset, reloc_offset - data_offset,
PE32_SCN_CNT_INITIALIZED_DATA
| PE32_SCN_MEM_WRITE
| PE32_SCN_MEM_READ);
#ifdef __ia64__
if (shdr_dynamic != NULL)
{
Elf64_Dyn *dyn = (Elf64_Dyn*)((uint8_t*)ehdr + shdr_dynamic->sh_offset);
while (dyn->d_tag != DT_NULL)
{
if (dyn->d_tag == DT_PLTGOT)
plt_base = dyn->d_un.d_ptr;
dyn++;
}
}
#endif
return status;
}
int
write_sections (int (*filter)(Elf_Shdr *))
{
uint32_t idx;
int status = 0;
/* First: copy sections. */
for (idx = 0; idx < ehdr->e_shnum; idx++)
{
Elf_Shdr *shdr = get_shdr_by_index (idx);
if ((*filter)(shdr))
{
switch (shdr->sh_type) {
case SHT_PROGBITS:
/* Copy. */
memcpy (coff_file + coff_sections_offset[idx],
(uint8_t*)ehdr + shdr->sh_offset,
shdr->sh_size);
break;
case SHT_NOBITS:
memset (coff_file + coff_sections_offset[idx], 0, shdr->sh_size);
break;
case SHT_DYNAMIC:
break;
default:
fprintf (stderr, "unhandled section type %x",
(unsigned int)shdr->sh_type);
status = -1;
}
}
}
/* Second: apply relocations. */
for (idx = 0; idx < ehdr->e_shnum; idx++)
{
Elf_Shdr *rel_shdr = get_shdr_by_index (idx);
if (rel_shdr->sh_type != SHT_REL && rel_shdr->sh_type != SHT_RELA)
continue;
Elf_Shdr *sec_shdr = get_shdr_by_index (rel_shdr->sh_info);
uint32_t sec_offset = coff_sections_offset[rel_shdr->sh_info];
if (rel_shdr->sh_info == 0 || (*filter)(sec_shdr))
{
uint32_t rel_idx;
Elf_Shdr *symtab_shdr = get_shdr_by_index(rel_shdr->sh_link);
uint8_t *symtab = (uint8_t*)ehdr + symtab_shdr->sh_offset;
if (rel_shdr->sh_type == SHT_REL)
{
for (rel_idx = 0;
rel_idx < rel_shdr->sh_size;
rel_idx += rel_shdr->sh_entsize)
{
Elf_Rel *rel = (Elf_Rel *)
((uint8_t*)ehdr + rel_shdr->sh_offset + rel_idx);
Elf_Sym *sym = (Elf_Sym *)
(symtab
+ ELF_R_SYM(rel->r_info) * symtab_shdr->sh_entsize);
Elf_Shdr *sym_shdr;
uint8_t *targ;
if (sym->st_shndx == SHN_UNDEF
|| sym->st_shndx == SHN_ABS
|| sym->st_shndx > ehdr->e_shnum)
{
fprintf (stderr, "bad symbol definition");
status = -1;
}
sym_shdr = get_shdr_by_index(sym->st_shndx);
/* Note: r_offset in a memory address.
Convert it to a pointer in the coff file. */
targ = coff_file + sec_offset
+ (rel->r_offset - sec_shdr->sh_addr);
switch (ELF_R_TYPE(rel->r_info)) {
case R_386_NONE:
break;
case R_386_32:
/* Absolute relocation. */
*(uint32_t *)targ = *(uint32_t *)targ - sym_shdr->sh_addr
+ coff_sections_offset[sym->st_shndx];
break;
case R_386_PC32:
/* Relative relocation: Symbol - Ip + Addend */
*(uint32_t *)targ = *(uint32_t *)targ
+ (coff_sections_offset[sym->st_shndx]
- sym_shdr->sh_addr)
- (sec_offset - sec_shdr->sh_addr);
break;
default:
fprintf (stderr, "unhandled relocation type %lx",
ELF_R_TYPE(rel->r_info));
status = -1;
}
}
}
else if (rel_shdr->sh_type == SHT_RELA)
{
for (rel_idx = 0;
rel_idx < rel_shdr->sh_size;
rel_idx += rel_shdr->sh_entsize) {
Elf_Rela *rela = (Elf_Rela *)
((uint8_t*)ehdr + rel_shdr->sh_offset + rel_idx);
Elf_Sym *sym = (Elf_Sym *)
(symtab + ELF_R_SYM(rela->r_info) * symtab_shdr->sh_entsize);
Elf_Shdr *sym_shdr;
uint8_t *targ;
if (ELF_R_TYPE(rela->r_info) == R_IA64_NONE)
continue;
#if 0
if (sym->st_shndx == SHN_UNDEF
|| sym->st_shndx == SHN_ABS
|| sym->st_shndx > ehdr->e_shnum) {
fprintf (stderr, "bad symbol definition %d",
ELF_R_SYM(rela->r_info));
}
#endif
sym_shdr = get_shdr_by_index (sym->st_shndx);
/* Note: r_offset in a memory address.
Convert it to a pointer in the coff file. */
targ = coff_file + sec_offset
+ (rela->r_offset - sec_shdr->sh_addr);
switch (ELF_R_TYPE(rela->r_info)) {
case R_IA64_IPLTLSB:
/* If there is a descriptor with the same function
pointer as the ELF entry point, use that
descriptor for the PE/Coff entry. */
if (*(uint64_t*)targ == ehdr->e_entry) {
struct pe32_nt_header *nt_hdr;
nt_hdr =
(struct pe32_nt_header*)(coff_file + nt_hdr_offset);
nt_hdr->optional_header.entry_addr = targ - coff_file;
}
break;
case R_IA64_REL64LSB:
case R_IA64_NONE:
break;
default:
fprintf (stderr,
"unhandled relocation type %lx in section %d",
ELF_R_TYPE(rela->r_info), rel_shdr->sh_info);
status = -1;
}
}
}
}
}
return status;
}
void
coff_add_fixup_entry (uint16_t val)
{
*coff_entry_rel = val;
coff_entry_rel++;
coff_base_rel->block_size += 2;
coff_offset += 2;
}
void
coff_add_fixup (uint32_t offset, uint8_t type)
{
if (coff_base_rel == NULL
|| coff_base_rel->page_rva != (offset & ~0xfff)) {
if (coff_base_rel != NULL) {
/* Add a null entry (is it required ?) */
coff_add_fixup_entry (0);
/* Pad for alignment. */
if (coff_offset % 4 != 0)
coff_add_fixup_entry (0);
}
coff_file = realloc
(coff_file,
coff_offset + sizeof(struct pe32_fixup_block) + 2*0x1000);
memset(coff_file + coff_offset, 0,
sizeof(struct pe32_fixup_block) + 2*0x1000);
coff_base_rel = (struct pe32_fixup_block*)(coff_file + coff_offset);
coff_base_rel->page_rva = offset & ~0xfff;
coff_base_rel->block_size = sizeof(struct pe32_fixup_block);
coff_entry_rel = (uint16_t *)(coff_base_rel + 1);
coff_offset += sizeof(struct pe32_fixup_block);
}
/* Fill the entry. */
coff_add_fixup_entry ((type << 12) | (offset & 0xfff));
}
int
write_relocations(void)
{
uint32_t idx;
struct pe32_nt_header *nt_hdr;
struct pe32_data_directory *dir;
int status = 0;
for (idx = 0; idx < ehdr->e_shnum; idx++)
{
Elf_Shdr *rel_shdr = get_shdr_by_index (idx);
if (rel_shdr->sh_type == SHT_REL)
{
Elf_Shdr *sec_shdr = get_shdr_by_index (rel_shdr->sh_info);
if (is_text_shdr(sec_shdr) || is_data_shdr(sec_shdr))
{
uint32_t rel_idx;
for (rel_idx = 0;
rel_idx < rel_shdr->sh_size;
rel_idx += rel_shdr->sh_entsize)
{
Elf_Rel *rel = (Elf_Rel *)
((uint8_t*)ehdr + rel_shdr->sh_offset + rel_idx);
switch (ELF_R_TYPE(rel->r_info))
{
case R_386_NONE:
case R_386_PC32:
break;
case R_386_32:
coff_add_fixup(coff_sections_offset[rel_shdr->sh_info]
+ (rel->r_offset - sec_shdr->sh_addr),
PE32_REL_BASED_HIGHLOW);
break;
default:
fprintf (stderr, "unhandled relocation type %lx",
ELF_R_TYPE(rel->r_info));
status = -1;
}
}
}
}
else if (rel_shdr->sh_type == SHT_RELA)
{
Elf_Shdr *sec_shdr = get_shdr_by_index(rel_shdr->sh_info);
if (rel_shdr->sh_info == 0
|| is_text_shdr(sec_shdr) || is_data_shdr(sec_shdr))
{
uint32_t rel_idx;
for (rel_idx = 0;
rel_idx < rel_shdr->sh_size;
rel_idx += rel_shdr->sh_entsize) {
Elf_Rela *rela = (Elf_Rela *)
((uint8_t*)ehdr + rel_shdr->sh_offset + rel_idx);
uint32_t Loc = coff_sections_offset[rel_shdr->sh_info]
+ (rela->r_offset - sec_shdr->sh_addr);
switch (ELF_R_TYPE(rela->r_info))
{
case R_IA64_IPLTLSB:
coff_add_fixup(Loc, PE32_REL_BASED_DIR64);
coff_add_fixup(Loc + 8, PE32_REL_BASED_DIR64);
break;
case R_IA64_REL64LSB:
coff_add_fixup(Loc, PE32_REL_BASED_DIR64);
break;
case R_IA64_DIR64LSB:
coff_add_fixup(Loc, PE32_REL_BASED_DIR64);
break;
case R_IA64_IMM64:
coff_add_fixup(Loc, PE32_REL_BASED_IA64_IMM64);
break;
case R_IA64_PCREL21B:
case R_IA64_PCREL64LSB:
case R_IA64_SECREL32LSB:
case R_IA64_SEGREL64LSB:
break;
case R_IA64_GPREL22:
case R_IA64_LTOFF22X:
case R_IA64_LDXMOV:
case R_IA64_LTOFF_FPTR22:
case R_IA64_NONE:
break;
default:
fprintf (stderr, "unhandled relocation type %lx",
ELF_R_TYPE(rela->r_info));
status = -1;
}
}
}
}
}
#ifdef __ia64__
coff_add_fixup (coff_entry_descr_offset, PE32_REL_BASED_DIR64);
coff_add_fixup (coff_entry_descr_offset + 8, PE32_REL_BASED_DIR64);
#endif
/* Pad by adding empty entries. */
while (coff_offset & (coff_alignment - 1))
coff_add_fixup_entry (0);
create_section_header (".reloc", reloc_offset, coff_offset - reloc_offset,
PE32_SCN_CNT_INITIALIZED_DATA
| PE32_SCN_MEM_DISCARDABLE
| PE32_SCN_MEM_READ);
nt_hdr = (struct pe32_nt_header *)(coff_file + nt_hdr_offset);
dir = &nt_hdr->optional_header.base_relocation_table;
dir->rva = reloc_offset;
dir->size = coff_offset - reloc_offset;
return status;
}
void
write_debug(void)
{
uint32_t len = strlen(filename) + 1;
uint32_t debug_offset = coff_offset;
struct pe32_nt_header *nt_hdr;
struct pe32_data_directory *data_dir;
struct pe32_debug_directory_entry *dir;
struct pe32_debug_codeview_nb10_entry *nb10;
coff_offset += sizeof (struct pe32_debug_directory_entry)
+ sizeof(struct pe32_debug_codeview_nb10_entry)
+ len;
coff_offset = coff_align(coff_offset);
coff_file = realloc
(coff_file, coff_offset);
memset(coff_file + debug_offset, 0, coff_offset - debug_offset);
dir = (struct pe32_debug_directory_entry*)(coff_file + debug_offset);
dir->type = PE32_DEBUG_TYPE_CODEVIEW;
dir->data_size = sizeof(struct pe32_debug_directory_entry) + len;
dir->rva = debug_offset + sizeof(struct pe32_debug_directory_entry);
dir->file_offset = debug_offset + sizeof(struct pe32_debug_directory_entry);
nb10 = (struct pe32_debug_codeview_nb10_entry*)(dir + 1);
nb10->signature = PE32_CODEVIEW_SIGNATURE_NB10;
strcpy (nb10->filename, filename);
create_section_header (".debug", debug_offset, coff_offset - debug_offset,
PE32_SCN_CNT_INITIALIZED_DATA
| PE32_SCN_MEM_DISCARDABLE
| PE32_SCN_MEM_READ);
nt_hdr = (struct pe32_nt_header *)(coff_file + nt_hdr_offset);
data_dir = &nt_hdr->optional_header.debug;
data_dir->rva = debug_offset;
data_dir->size = coff_offset - debug_offset;
}
int
convert_elf (uint8_t **file_buffer, unsigned int *file_length)
{
struct pe32_nt_header *nt_hdr;
/* Check header, read section table. */
ehdr = (Elf_Ehdr*)*file_buffer;
if (!check_elf_header ())
return -1;
/* Compute sections new address. */
if (scan_sections () != 0)
return -2;
/* Write and relocate sections. */
if (write_sections (is_text_shdr) != 0)
return -3;
#ifdef __ia64__
*(uint64_t*)(coff_file + coff_entry_descr_offset) = coff_entry_descr_func;
*(uint64_t*)(coff_file + coff_entry_descr_offset + 8) = plt_base;
#endif
if (write_sections (is_data_shdr) != 0)
return -4;
/* Translate and write relocations. */
if (write_relocations () != 0)
return -5;
/* Write debug info. */
write_debug ();
nt_hdr = (struct pe32_nt_header *)(coff_file + nt_hdr_offset);
nt_hdr->optional_header.image_size = coff_offset;
nt_hdr->optional_header.subsystem = PE32_SUBSYSTEM_EFI_APPLICATION;
/* Replace. */
free (*file_buffer);
*file_buffer = coff_file;
*file_length = coff_offset;
return 0;
}
int
main (int argc, char **argv)
{
FILE *f;
unsigned int size;
uint8_t *buffer;
const char *outfile;
int status;
if (argc != 3)
{
fprintf (stderr, "usage: %s elf-file pe-file\n", argv[0]);
exit (1);
}
filename = argv[1];
outfile = argv[2];
f = fopen (filename, "rb");
fseek (f, 0, SEEK_END);
size = ftell (f);
fseek (f, 0, SEEK_SET);
buffer = malloc (size);
if (buffer == NULL)
{
fprintf (stderr, "cannot allocate %u bytes of memory\n", size);
exit (2);
}
if (fread (buffer, size, 1, f) != 1)
{
fprintf (stderr, "cannot read %s\n", filename);
exit (2);
}
fclose (f);
if (!is_elf_header (buffer))
{
fprintf (stderr, "%s is not an elf file\n", filename);
exit (2);
}
status = convert_elf (&buffer, &size);
if (status != 0)
{
fprintf (stderr, "cannot convert %s to pe (err=%d)\n", filename, status);
exit (2);
}
f = fopen (outfile, "wb");
if (f == NULL)
{
fprintf (stderr, "cannot open %s\n", outfile);
exit (2);
}
if (fwrite (buffer, size, 1, f) != 1)
{
fprintf (stderr, "cannot write to %s\n", outfile);
exit (2);
}
fclose (f);
return 0;
}
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