392 lines
12 KiB
C
392 lines
12 KiB
C
/*
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* common utility functions for cbfstool
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*
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* Copyright (C) 2009 coresystems GmbH
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* written by Patrick Georgi <patrick.georgi@coresystems.de>
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*
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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; version 2 of the License.
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*
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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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*
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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 St, Fifth Floor, Boston, MA, 02110-1301 USA
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "common.h"
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#include "cbfs.h"
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#include "elf.h"
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#define dprintf
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uint32_t getfilesize(const char *filename)
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{
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uint32_t size;
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FILE *file = fopen(filename, "rb");
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fseek(file, 0, SEEK_END);
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size = ftell(file);
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fclose(file);
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return size;
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}
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void *loadfile(const char *filename, uint32_t * romsize_p, void *content,
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int place)
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{
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FILE *file = fopen(filename, "rb");
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if (file == NULL)
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return NULL;
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fseek(file, 0, SEEK_END);
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*romsize_p = ftell(file);
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fseek(file, 0, SEEK_SET);
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if (!content) {
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content = malloc(*romsize_p);
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if (!content) {
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printf("Could not get %d bytes for file %s\n",
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*romsize_p, filename);
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exit(1);
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}
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} else if (place == SEEK_END)
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content -= *romsize_p;
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if (!fread(content, *romsize_p, 1, file)) {
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printf("failed to read %s\n", filename);
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return NULL;
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}
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fclose(file);
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return content;
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}
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struct cbfs_header *master_header;
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uint32_t phys_start, phys_end, align, romsize;
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void *offset;
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void recalculate_rom_geometry(void *romarea)
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{
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offset = romarea + romsize - 0x100000000ULL;
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master_header = (struct cbfs_header *)
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phys_to_virt(*((uint32_t *) phys_to_virt(0xfffffffc)));
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phys_start = (0 - romsize + ntohl(master_header->offset)) & 0xffffffff;
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phys_end =
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(0 - ntohl(master_header->bootblocksize) -
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sizeof(struct cbfs_header)) & 0xffffffff;
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align = ntohl(master_header->align);
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}
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void *loadrom(const char *filename)
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{
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void *romarea = loadfile(filename, &romsize, 0, SEEK_SET);
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if (romarea == NULL)
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return NULL;
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recalculate_rom_geometry(romarea);
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return romarea;
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}
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void writerom(const char *filename, void *start, uint32_t size)
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{
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FILE *file = fopen(filename, "wb");
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fwrite(start, size, 1, file);
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fclose(file);
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}
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int cbfs_file_header(uint32_t physaddr)
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{
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/* maybe improve this test */
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return (strncmp(phys_to_virt(physaddr), "LARCHIVE", 8) == 0);
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}
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struct cbfs_file *cbfs_create_empty_file(uint32_t physaddr, uint32_t size)
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{
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struct cbfs_file *nextfile = (struct cbfs_file *)phys_to_virt(physaddr);
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strncpy(nextfile->magic, "LARCHIVE", 8);
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nextfile->len = htonl(size);
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nextfile->type = htonl(0xffffffff);
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nextfile->checksum = 0; // FIXME?
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nextfile->offset = htonl(sizeof(struct cbfs_file) + 16);
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memset(((void *)nextfile) + sizeof(struct cbfs_file), 0, 16);
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return nextfile;
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}
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int iself(unsigned char *input)
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{
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Elf32_Ehdr *ehdr = (Elf32_Ehdr *) input;
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return !memcmp(ehdr->e_ident, ELFMAG, 4);
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}
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struct filetypes_t {
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uint32_t type;
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const char *name;
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} filetypes[] = {
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{CBFS_COMPONENT_STAGE, "stage"},
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{CBFS_COMPONENT_PAYLOAD, "payload"},
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{CBFS_COMPONENT_OPTIONROM, "optionrom"},
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{CBFS_COMPONENT_DELETED, "deleted"},
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{CBFS_COMPONENT_NULL, "null"}
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};
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const char *strfiletype(uint32_t number)
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{
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int i;
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for (i = 0; i < (sizeof(filetypes) / sizeof(struct filetypes_t)); i++)
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if (filetypes[i].type == number)
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return filetypes[i].name;
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return "unknown";
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}
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uint64_t intfiletype(const char *name)
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{
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int i;
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for (i = 0; i < (sizeof(filetypes) / sizeof(struct filetypes_t)); i++)
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if (strcmp(filetypes[i].name, name) == 0)
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return filetypes[i].type;
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return -1;
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}
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void print_cbfs_directory(const char *filename)
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{
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printf
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("%s: %d kB, bootblocksize %d, romsize %d, offset 0x%x\nAlignment: %d bytes\n\n",
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filename, romsize / 1024, ntohl(master_header->bootblocksize),
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romsize, ntohl(master_header->offset), align);
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printf("%-30s %-10s %-12s Size\n", "Name", "Offset", "Type");
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uint32_t current = phys_start;
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while (current < phys_end) {
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if (!cbfs_file_header(current)) {
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current += align;
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continue;
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}
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struct cbfs_file *thisfile =
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(struct cbfs_file *)phys_to_virt(current);
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uint32_t length = ntohl(thisfile->len);
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printf("%-30s 0x%-8x %-12s %d\n",
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(const char *)(phys_to_virt(current) +
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sizeof(struct cbfs_file)),
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current - phys_start, strfiletype(ntohl(thisfile->type)),
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length);
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current =
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ALIGN(current + ntohl(thisfile->len) +
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ntohl(thisfile->offset), align);
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}
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}
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int add_file_to_cbfs(void *content, uint32_t contentsize, uint32_t location)
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{
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uint32_t current = phys_start;
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while (current < phys_end) {
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if (!cbfs_file_header(current)) {
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current += align;
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continue;
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}
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struct cbfs_file *thisfile =
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(struct cbfs_file *)phys_to_virt(current);
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uint32_t length = ntohl(thisfile->len);
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dprintf("at %x, %x bytes\n", current, length);
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/* Is this a free chunk? */
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if ((thisfile->type == CBFS_COMPONENT_DELETED)
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|| (thisfile->type == CBFS_COMPONENT_NULL)) {
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dprintf("null||deleted at %x, %x bytes\n", current,
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length);
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/* if this is the right size, and if specified, the right location, use it */
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if ((contentsize <= length)
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&& ((location == 0) || (current == location))) {
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if (contentsize < length) {
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dprintf
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("this chunk is %x bytes, we need %x. create a new chunk at %x with %x bytes\n",
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length, contentsize,
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ALIGN(current + contentsize,
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align),
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length - contentsize);
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uint32_t start =
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ALIGN(current + contentsize, align);
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uint32_t size =
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current + ntohl(thisfile->offset)
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+ length - start - 16 -
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sizeof(struct cbfs_file);
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cbfs_create_empty_file(start, size);
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}
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dprintf("copying data\n");
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memcpy(phys_to_virt(current), content,
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contentsize);
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return 0;
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}
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if (location != 0) {
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/* CBFS has the constraint that the chain always moves up in memory. so once
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we're past the place we seek, we don't need to look any further */
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if (current > location) {
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printf
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("the requested space is not available\n");
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return 1;
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}
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/* Is the requested location inside the current chunk? */
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if ((current < location)
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&& ((location + contentsize) <=
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(current + length))) {
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/* Split it up. In the next iteration the code will be at the right place. */
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dprintf("split up. new length: %x\n",
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location - current -
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ntohl(thisfile->offset));
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thisfile->len =
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htonl(location - current -
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ntohl(thisfile->offset));
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struct cbfs_file *nextfile =
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cbfs_create_empty_file(location,
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length -
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(location -
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current));
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}
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}
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}
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current =
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ALIGN(current + ntohl(thisfile->len) +
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ntohl(thisfile->offset), align);
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}
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printf("Could not add the file to CBFS, it's probably too big.\n");
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printf("File size: %d bytes (%d KB).\n", contentsize, contentsize/1024);
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return 1;
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}
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/* returns new data block with cbfs_file header, suitable to dump into the ROM. location returns
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the new location that points to the cbfs_file header */
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void *create_cbfs_file(const char *filename, void *data, uint32_t * datasize,
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uint32_t type, uint32_t * location)
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{
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uint32_t filename_len = ALIGN(strlen(filename) + 1, 16);
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uint32_t headersize = sizeof(struct cbfs_file) + filename_len;
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if ((location != 0) && (*location != 0)) {
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uint32_t offset = *location % align;
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/* If offset >= (headersize % align), we can stuff the header into the offset.
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Otherwise the header has to be aligned itself, and put before the offset data */
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if (offset >= (headersize % align)) {
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offset -= (headersize % align);
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} else {
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offset += align - (headersize % align);
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}
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headersize += offset;
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*location -= headersize;
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}
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void *newdata = malloc(*datasize + headersize);
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if (!newdata) {
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printf("Could not get %d bytes for CBFS file.\n", *datasize +
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headersize);
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exit(1);
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}
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struct cbfs_file *nextfile = (struct cbfs_file *)newdata;
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strncpy(nextfile->magic, "LARCHIVE", 8);
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nextfile->len = htonl(*datasize);
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nextfile->type = htonl(type);
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nextfile->checksum = 0; // FIXME?
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nextfile->offset = htonl(headersize);
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strcpy(newdata + sizeof(struct cbfs_file), filename);
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memcpy(newdata + headersize, data, *datasize);
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*datasize += headersize;
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return newdata;
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}
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int create_cbfs_image(const char *romfile, uint32_t _romsize,
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const char *bootblock, uint32_t align)
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{
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romsize = _romsize;
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unsigned char *romarea = malloc(romsize);
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if (!romarea) {
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printf("Could not get %d bytes of memory for CBFS image.\n",
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romsize);
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exit(1);
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}
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memset(romarea, 0xff, romsize);
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// Set up physical/virtual mapping
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offset = romarea + romsize - 0x100000000ULL;
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if (align == 0)
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align = 64;
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uint32_t bootblocksize = 0;
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loadfile(bootblock, &bootblocksize, romarea + romsize, SEEK_END);
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struct cbfs_header *master_header =
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(struct cbfs_header *)(romarea + romsize - bootblocksize -
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sizeof(struct cbfs_header));
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master_header->magic = ntohl(0x4f524243);
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master_header->version = ntohl(0x31313131);
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master_header->romsize = htonl(romsize);
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master_header->bootblocksize = htonl(bootblocksize);
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master_header->align = htonl(align);
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master_header->offset = htonl(0);
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((uint32_t *) phys_to_virt(0xfffffffc))[0] =
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virt_to_phys(master_header);
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recalculate_rom_geometry(romarea);
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struct cbfs_file *one_empty_file =
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cbfs_create_empty_file((0 - romsize) & 0xffffffff,
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romsize - bootblocksize -
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sizeof(struct cbfs_header) -
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sizeof(struct cbfs_file) - 16);
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writerom(romfile, romarea, romsize);
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return 0;
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}
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static int in_segment(int addr, int size, int gran)
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{
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return ((addr & ~(gran - 1)) == ((addr + size) & ~(gran - 1)));
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}
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uint32_t cbfs_find_location(const char *romfile, uint32_t filesize,
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const char *filename, uint32_t alignment)
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{
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void *rom = loadrom(romfile);
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int filename_size = strlen(filename);
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int headersize =
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sizeof(struct cbfs_file) + ALIGN(filename_size + 1,
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16) + sizeof(struct cbfs_stage);
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int totalsize = headersize + filesize;
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uint32_t current = phys_start;
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while (current < phys_end) {
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if (!cbfs_file_header(current)) {
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current += align;
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continue;
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}
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struct cbfs_file *thisfile =
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(struct cbfs_file *)phys_to_virt(current);
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uint32_t top =
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current + ntohl(thisfile->len) + ntohl(thisfile->offset);
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if (((ntohl(thisfile->type) == 0x0)
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|| (ntohl(thisfile->type) == 0xffffffff))
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&& (ntohl(thisfile->len) + ntohl(thisfile->offset) >=
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totalsize)) {
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if (in_segment
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(current + headersize, filesize, alignment))
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return current + headersize;
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if ((ALIGN(current, alignment) + filesize < top)
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&& (ALIGN(current, alignment) - headersize >
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current)
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&& in_segment(ALIGN(current, alignment), filesize,
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alignment))
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return ALIGN(current, alignment);
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if ((ALIGN(current, alignment) + alignment + filesize <
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top)
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&& (ALIGN(current, alignment) + alignment -
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headersize > current)
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&& in_segment(ALIGN(current, alignment) + alignment,
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filesize, alignment))
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return ALIGN(current, alignment) + alignment;
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}
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current =
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ALIGN(current + ntohl(thisfile->len) +
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ntohl(thisfile->offset), align);
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}
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return 0;
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}
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