| /* |
| * 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; |
| } |