FreeCalypso > hg > freecalypso-reveng
view pirollback/init.c @ 406:1a852266ba74
tfo moved to gsm-net-reveng repository
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Fri, 24 May 2024 21:19:59 +0000 |
parents | 15c2ac2c5c73 |
children |
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#include <sys/types.h> #include <sys/file.h> #include <endian.h> #include <stdio.h> #include <string.h> #include <strings.h> #include <stdlib.h> #include <unistd.h> #include "types.h" #include "struct.h" u8 blank_flash_line[16] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF}; char *imgfile; u8 image[0x480000]; struct inode_info inode[0x4000]; int last_inode; static u8 magichdr_first[9] = {'F','f','s','#', 0x10, 0x02, 0xFF, 0xFF, 0xAB}; static u8 magichdr_mid[9] = {'F','f','s','#', 0x10, 0x02, 0xFF, 0xFF, 0xBD}; static u8 magichdr_last[9] = {'F','f','s','#', 0x10, 0x02, 0xFF, 0xFF, 0xBF}; read_img_file() { int i, fd, cc; u8 *blk, *compare; fd = open(imgfile, O_RDONLY); if (fd < 0) { perror(imgfile); exit(1); } cc = read(fd, image, sizeof image); close(fd); if (cc != sizeof image) { inv: fprintf(stderr, "%s does not appear to be a \"virgin\" Pirelli FFS image\n", imgfile); exit(1); } for (i = 0; i < 18; i++) { blk = image + i * 0x40000; if (i == 0) compare = magichdr_first; else if (i == 17) compare = magichdr_last; else compare = magichdr_mid; if (bcmp(blk, compare, 9)) goto inv; } } static int convert_ptr(ptr, ino, which) int ptr, ino; char *which; { if (ptr >= 1 && ptr <= 0x3FFF) return(ptr); if (ptr == 0xFFFF) return(0); fprintf(stderr, "error in inode #%x: invalid %s pointer\n", ino, which); exit(1); } read_inodes() { int ino; struct inode_flash *fl; struct inode_info *inf; for (ino = 1; ino < 0x4000; ino++) { fl = (struct inode_flash *) image + ino; if (!bcmp(fl, blank_flash_line, 16)) break; inf = inode + ino; inf->flash = fl; inf->len = le16toh(fl->len); if (!inf->len) { fprintf(stderr, "error: inode %x has zero length\n", ino); exit(1); } if (inf->len & 0xF) { fprintf(stderr, "error: inode %x has bad length\n", ino); exit(1); } inf->type = fl->type; inf->descend = convert_ptr(le16toh(fl->descend), ino, "descendant"); inf->sibling = convert_ptr(le16toh(fl->sibling), ino, "sibling"); inf->rawloc = le32toh(fl->dataptr); if (inf->rawloc >= 0x48000) { invdptr: fprintf(stderr, "error: inode %x data pointer is out of bounds\n", ino); exit(1); } inf->offset = inf->rawloc << 4; if (inf->offset + inf->len > 0x480000) goto invdptr; inf->dataptr = image + inf->offset; } last_inode = ino - 1; if (!last_inode) { fprintf(stderr, "error: no inodes found!\n"); exit(1); } }