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/*
* This file is part of the bayou project.
*
* Copyright (C) 2008 Advanced Micro Devices, Inc.
*
* Includes code from util/lar from coreboot-v3
*
* Copyright (C) 2006-2007 coresystems GmbH
* Copyright (C) 2007 Patrick Georgi <patrick@georgi-clan.de>
* Copyright (C) 2007 Advanced Micro Devices, Inc.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <sys/stat.h>
#include "elf.h"
#include <sys/mman.h>
#include <unistd.h>
#include <fcntl.h>
#include <stdint.h>
typedef uint64_t u64;
typedef int64_t s64;
typedef uint32_t u32;
typedef int32_t s32;
typedef uint8_t u8;
#include "self.h"
int elf_to_self(const char *filename, unsigned char **buffer,
void (*compress) (char *, int, char *, int *))
{
struct stat s;
Elf32_Phdr *phdr;
Elf32_Ehdr *ehdr;
Elf32_Shdr *shdr;
void *filep;
char *header, *strtab;
unsigned char *sptr;
int headers, segments = 1, isize = 0, osize = 0, doffset = 0, fd, i;
struct self_segment *segs;
if (stat(filename, &s)) {
printf("Unable to stat %s: %m\n", filename);
return -1;
}
fd = open(filename, O_RDONLY);
if (fd == -1) {
printf("Unable to open %s: %m\n", filename);
return -1;
}
/* Map the file so that we can easily parse it. */
filep = (void *)
mmap(0, s.st_size, PROT_READ, MAP_SHARED, fd, 0);
if (filep == MAP_FAILED) {
close(fd);
return -1;
}
ehdr = (Elf32_Ehdr *) filep;
headers = ehdr->e_phnum;
header = (char *)ehdr;
phdr = (Elf32_Phdr *) & (header[ehdr->e_phoff]);
shdr = (Elf32_Shdr *) & (header[ehdr->e_shoff]);
strtab = &header[shdr[ehdr->e_shstrndx].sh_offset];
/* Count number of headers - look for the .notes.pinfo section. */
for (i = 0; i < ehdr->e_shnum; i++) {
char *name;
if (i == ehdr->e_shstrndx)
continue;
if (shdr[i].sh_size == 0)
continue;
name = (char *)(strtab + shdr[i].sh_name);
if (!strcmp(name, ".note.pinfo"))
segments++;
}
/*
* Now, regular headers - we only care about PT_LOAD headers,
* because thats what we're actually going to load.
*/
for (i = 0; i < headers; i++) {
if (phdr[i].p_type != PT_LOAD)
continue;
/* Empty segments are never interesting. */
if (phdr[i].p_memsz == 0)
continue;
isize += phdr[i].p_filesz;
segments++;
}
/* Allocate a block of memory to store the SELF in. */
sptr = calloc((segments * sizeof(struct self_segment)) + isize, 1);
doffset = (segments * sizeof(struct self_segment));
if (sptr == NULL)
goto err;
segs = (struct self_segment *)sptr;
segments = 0;
for (i = 0; i < ehdr->e_shnum; i++) {
char *name;
if (i == ehdr->e_shstrndx)
continue;
if (shdr[i].sh_size == 0)
continue;
name = (char *)(strtab + shdr[i].sh_name);
if (!strcmp(name, ".note.pinfo")) {
segs[segments].type = SELF_TYPE_PARAMS;
segs[segments].load_addr = 0;
segs[segments].len = (u32) shdr[i].sh_size;
segs[segments].offset = doffset;
memcpy((unsigned long *)(sptr + doffset),
&header[shdr[i].sh_offset], shdr[i].sh_size);
doffset += segs[segments].len;
osize += segs[segments].len;
segments++;
}
}
for (i = 0; i < headers; i++) {
if (phdr[i].p_type != PT_LOAD)
continue;
if (phdr[i].p_memsz == 0)
continue;
segs[segments].type = SELF_TYPE_DATA;
segs[segments].load_addr = (u64) phdr[i].p_paddr;
segs[segments].mem_len = (u32) phdr[i].p_memsz;
segs[segments].offset = doffset;
compress((char *)&header[phdr[i].p_offset],
phdr[i].p_filesz,
(char *)(sptr + doffset), (int *)&segs[segments].len);
doffset += segs[segments].len;
osize += segs[segments].len;
segments++;
}
segs[segments].type = SELF_TYPE_ENTRY;
segs[segments++].load_addr = (unsigned long long)ehdr->e_entry;
*buffer = sptr;
munmap(filep, s.st_size);
close(fd);
return (segments * sizeof(struct self_segment)) + osize;
err:
munmap(filep, s.st_size);
close(fd);
return -1;
}
int iself(char *filename)
{
Elf32_Ehdr ehdr;
int fd = open(filename, O_RDONLY);
int ret = 0;
if (fd == -1)
return 0;
if (read(fd, &ehdr, sizeof(ehdr)) == sizeof(ehdr))
ret = !memcmp(ehdr.e_ident, ELFMAG, 4);
close(fd);
return ret;
}
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