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/******************************************************************************
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* Copyright (c) 2004, 2008 IBM Corporation
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* This program and the accompanying materials
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* are made available under the terms of the BSD License
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* which accompanies this distribution, and is available at
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* http://www.opensource.org/licenses/bsd-license.php
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* IBM Corporation - initial implementation
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*****************************************************************************/
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#include <sys/types.h>
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#include <createcrc.h>
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#define FFS_TARGET_HEADER_SIZE (4 * 8)
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#define pad8_num(x) (((x) + 7) & ~7)
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file_exist(const char *name, int errdisp)
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memset((void *) &fileinfo, 0, sizeof(struct stat));
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if (stat(name, &fileinfo) != 0) {
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if (S_ISREG(fileinfo.st_mode)) {
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file_getsize(const char *name)
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ffshdr_compare(const void *_a, const void *_b)
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const struct ffs_header_t *a = *(struct ffs_header_t * const *) _a;
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const struct ffs_header_t *b = *(struct ffs_header_t * const *) _b;
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if (a->romaddr == b->romaddr)
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if (a->romaddr > b->romaddr)
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hdr_print(struct ffs_header_t *hdr)
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printf("hdr: %p\n", hdr);
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printf("\taddr: %08llx token: %s\n"
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"\tflags: %08llx romaddr: %08llx image_len: %08x\n"
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"\tsave_len: %08llx ffsize: %08x hdrsize: %08x\n"
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"\ttokensize: %08x\n",
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hdr->addr, hdr->token, hdr->flags, hdr->romaddr,
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hdr->imagefile_length, hdr->save_data_len,
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hdr->ffsize, hdr->hdrsize, hdr->tokensize);
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reorder_ffs_chain(struct ffs_chain_t *fs)
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unsigned long long addr;
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struct ffs_header_t *hdr;
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int fix, flx, res, tab_size = fs->count;
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struct ffs_header_t *fix_tab[tab_size]; /* fixed offset */
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struct ffs_header_t *flx_tab[tab_size]; /* flexible offset */
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struct ffs_header_t *res_tab[tab_size]; /* result */
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/* determine size data to be able to do the reordering */
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for (hdr = fs->first; hdr; hdr = hdr->next) {
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hdr->imagefile_length = 0;
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hdr->imagefile_length = file_getsize(hdr->imagefile);
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if (hdr->imagefile_length == -1)
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hdr->tokensize = pad8_num(strlen(hdr->token) + 1);
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hdr->hdrsize = FFS_TARGET_HEADER_SIZE + hdr->tokensize;
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hdr->hdrsize + pad8_num(hdr->imagefile_length) + 8;
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memset(res_tab, 0, tab_size * sizeof(struct ffs_header_t *));
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memset(fix_tab, 0, tab_size * sizeof(struct ffs_header_t *));
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memset(flx_tab, 0, tab_size * sizeof(struct ffs_header_t *));
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/* now start with entries having fixed offs, reorder if needed */
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for (fix = 0, flx = 0, hdr = fs->first; hdr; hdr = hdr->next)
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if (needs_fix_offset(hdr))
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fix_tab[fix++] = hdr;
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flx_tab[flx++] = hdr;
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qsort(fix_tab, fix, sizeof(struct ffs_header_t *), ffshdr_compare);
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* for fixed files we need to also remove the hdrsize from the
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* free space because it placed in front of the romaddr
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for (addr = 0, res = 0, i = 0, j = 0; i < fix; i++) {
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fix_tab[i]->addr = fix_tab[i]->romaddr - fix_tab[i]->hdrsize;
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free_space = fix_tab[i]->addr - addr;
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/* insert as many flexible files as possible */
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for (; free_space > 0 && j < flx; j++) {
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if (flx_tab[j]->ffsize <= free_space) { /* fits */
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flx_tab[j]->addr = addr;
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free_space -= flx_tab[j]->ffsize;
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addr += flx_tab[j]->ffsize;
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res_tab[res++] = flx_tab[j];
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res_tab[res++] = fix_tab[i];
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addr = fix_tab[i]->romaddr + fix_tab[i]->ffsize -
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/* at the end fill up the table with remaining flx entries */
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for (; j < flx; j++) {
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flx_tab[j]->addr = addr;
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addr += flx_tab[j]->ffsize;
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res_tab[res++] = flx_tab[j];
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printf("--- resulting order ---\n");
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for (i = 0; i < tab_size; i++)
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hdr_print(res_tab[i]);
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/* to check if the requested romfs images is greater than
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* the specified romfs_size it is necessary to add 8 for
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* the CRC to the totalsize */
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/* sanity checking if user specified maximum romfs size */
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if ((fs->romfs_size != 0) && addr > fs->romfs_size) {
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fprintf(stderr, "[build_romfs] romfs_size specified as %d "
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"bytes, but %lld bytes need to be written.\n",
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fs->romfs_size, addr);
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/* resort result list */
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for (i = 0; i < tab_size - 1; i++)
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res_tab[i]->next = res_tab[i + 1];
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res_tab[i]->next = NULL;
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fs->first = res_tab[0];
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* allocate memory for a romfs file including header
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static unsigned char *
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malloc_file(int hdrsz, int datasz, int *ffsz)
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/* complete file size is:
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* header + 8byte aligned(data) + end of file marker (-1) */
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*ffsz = hdrsz + pad8_num(datasz) + 8;
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memset(tmp, 0, *ffsz);
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return (unsigned char *) tmp;
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copy_file(struct ffs_header_t *hdr, unsigned char *ffile, int datasize,
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int ffile_offset, int ffsize)
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if (!file_exist(hdr->imagefile, 1)) {
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printf("access error to file: %s\n", hdr->imagefile);
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imgfd = open(hdr->imagefile, O_RDONLY);
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perror(hdr->imagefile);
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/* now copy file to file buffer */
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/* FIXME using fread might be a good idea so
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that we do not need to deal with shortened
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reads/writes. Also error handling looks
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broken to me. Are we sure that all data is
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read when exiting this loop? */
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i = read(imgfd, ffile + ffile_offset, ffsize - ffile_offset);
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if (cnt != datasize) {
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printf("BUG!!! copy error on image file [%s](e%d, g%d)\n",
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hdr->imagefile, datasize, cnt);
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next_file_offset(struct ffs_header_t *hdr, int rom_pos, int ffsize)
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/* no next file; end of filesystem */
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if (hdr->next == NULL)
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if (hdr->next->romaddr > 0) {
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/* the next file does not follow directly after the
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* current file because it requested to be
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* placed at a special address;
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* we need to calculate the offset of the
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* the next file starts at hdr->next->romaddr which
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* is the address requested by the user */
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tmp = hdr->next->romaddr;
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/* the next file starts, however, a bit earlier;
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* we need to point at the header of the next file;
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* therefore it is necessary to subtract the header size
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* of the _next_ file */
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tmp -= FFS_TARGET_HEADER_SIZE;
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/* also remove the length of the filename of the _next_
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tmp -= pad8_num(strlen(hdr->next->token) + 1);
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/* and it needs to be relative to the current file */
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/* if no special treatment is required the next file just
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* follows after the current file;
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* therefore just return the complete filesize as offset */
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next_file_address(struct ffs_header_t *hdr, unsigned int rom_pos, int hdrsize,
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unsigned int num_files)
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/* check if file wants a specific address */
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if ((hdr->flags & FLAG_LLFW) == 0)
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/* flag to get a specific address has been set */
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if (hdr->romaddr == 0)
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/* if the requested address is 0 then
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* something is not right; ignore the flag */
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/* check if romaddress is below current position */
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if (hdr->romaddr < (rom_pos + hdrsize)) {
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printf("[%s] ERROR: requested impossible " "romaddr of %llx\n",
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hdr->token, hdr->romaddr);
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/* spin offset to new position */
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if (pad8_num(hdr->romaddr) != hdr->romaddr) {
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printf("BUG!!!! pad8_num(hdr->romaddr) != hdr->romaddr\n");
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tmp = malloc(hdr->romaddr - rom_pos - hdrsize);
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memset(tmp, 0, hdr->romaddr - rom_pos - hdrsize);
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if (buildDataStream(tmp, hdr->romaddr - rom_pos - hdrsize)) {
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printf("write failed\n");
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printf("\nWARNING: The filesystem will have no entry header!\n"
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" It is still usable but you need to find\n"
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" the FS by yourself in the image.\n\n");
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return hdr->romaddr - hdrsize;
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build_ffs(struct ffs_chain_t *fs, const char *outfile, int notime)
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int ffsize, datasize, i;
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int tokensize, hdrsize, ffile_offset, hdrbegin;
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struct ffs_header_t *hdr;
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unsigned char *ffile;
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unsigned int rom_pos = 0;
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unsigned int num_files = 0;
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if (NULL == fs->first) {
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/* check output file and open it for creation */
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if (file_exist(outfile, 0)) {
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printf("Output file (%s) will be overwritten\n", outfile);
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if (hdr->linked_to) {
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printf("\nBUG!!! links not supported anymore\n");
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/* add +1 to strlen for zero termination */
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tokensize = pad8_num(strlen(hdr->token) + 1);
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hdrsize = FFS_TARGET_HEADER_SIZE + tokensize;
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datasize = file_getsize(hdr->imagefile);
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if (datasize == -1) {
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perror(hdr->imagefile);
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ffile = malloc_file(hdrsize, datasize, &ffsize);
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perror("alloc mem for ffile");
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/* check if file wants a specific address */
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rom_pos = next_file_address(hdr, rom_pos, hdrsize, num_files);
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if (hdrbegin == -1) {
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/* something went wrong */
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/* write header ******************************************* */
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/* next addr ********************************************** */
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tmp = next_file_offset(hdr, rom_pos, ffsize);
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*(uint64_t *) (ffile + ffile_offset) = cpu_to_be64(tmp);
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/* length ************************************************* */
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hdr->save_data_len = datasize;
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*(uint64_t *) (ffile + ffile_offset) = cpu_to_be64(datasize);
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/* flags ************************************************** */
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*(uint64_t *) (ffile + ffile_offset) = cpu_to_be64(hdr->flags);
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/* datapointer ******************************************** */
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//save-data pointer is relative to rombase
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hdr->save_data = hdrbegin + hdrsize;
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hdr->save_data_valid = 1;
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//changed pointers to be relative to file:
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tmp = hdr->save_data - hdrbegin;
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*(uint64_t *) (ffile + ffile_offset) = cpu_to_be64(tmp);
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/* name (token) ******************************************* */
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memset(ffile + ffile_offset, 0, tokensize);
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strcpy((char *) ffile + ffile_offset, hdr->token);
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rom_pos += tokensize;
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ffile_offset += tokensize;
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/* image file ********************************************* */
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i = copy_file(hdr, ffile, datasize, ffile_offset, ffsize);
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rom_pos += i + pad8_num(datasize) - datasize;
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ffile_offset += i + pad8_num(datasize) - datasize;
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/* limiter ************************************************ */
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*(uint64_t *) (ffile + ffile_offset) = -1;
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if (buildDataStream(ffile, ffsize) != 0) {
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("Failed while processing file '%s' (size = %d bytes)\n",
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hdr->imagefile, datasize);
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* FIXME Current limination seems to be about 4MiB.
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ofdCRC = open(outfile, O_CREAT | O_WRONLY | O_TRUNC, 0666);
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i = writeDataStream(ofdCRC, notime);