FreeCalypso > hg > freecalypso-tools
view ffstools/tiffs-rd/inode.c @ 995:74024eb17e04
fc-loadtool help: improve language regarding 16 MiB flash chips
In FC project history, 16 MiB flash originally meant Pirelli DP-L10.
Then we got FCDEV3B with the same flash (our own design), but now we are
discovering more Calypso devices that used such large flash, both late
Calypso era (Sony Ericsson K2x0) as well as much earlier ones (FIC FLUID
devices.txt file with 2004 dates, Leonardo+ rev 5). Hence we need to
migrate to more generic or neutral language in associated documentation,
without giving elevated status to specific examples that drove our
early project history.
author | Mychaela Falconia <falcon@freecalypso.org> |
---|---|
date | Sun, 03 Dec 2023 21:11:12 +0000 |
parents | e7502631a0f9 |
children |
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/* * This C module implements the reading and decoding of inode information. */ #include <sys/types.h> #include <endian.h> #include <stdio.h> #include <stdlib.h> #include <string.h> #include <strings.h> #include "types.h" #include "struct.h" #include "globals.h" u8 blank_flash_line[16] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF}; alloc_inode_table() { inode_info = malloc(sizeof(struct inode_info *) * inode_limit); if (!inode_info) { perror("malloc of inode table"); exit(1); } bzero(inode_info, sizeof(struct inode_info *) * inode_limit); } static int convert_ptr(in, infp) int in; int *infp; { if (in == 0xFFFF) { *infp = 0; return(0); } if (in < 1 || in >= inode_limit) return(-1); *infp = in; return(1); } validate_inode(ino) { struct inode_flash *fl; struct inode_info *inf; if (ino < 1 || ino >= inode_limit) return(0); if (inode_info[ino]) return(1); fl = (struct inode_flash *)inode_block + ino; if (!bcmp(fl, blank_flash_line, sizeof blank_flash_line)) return(0); inf = malloc(sizeof(struct inode_info)); if (!inf) { perror("malloc of struct inode_info"); exit(1); } bzero(inf, sizeof(struct inode_info)); inf->ino = ino; inf->len = le16toh(fl->len); if (inf->len & 0xF) { fprintf(stderr, "warning: inode #%x: invalid length, skipping\n", ino); free(inf); return(0); } inf->type = fl->type; switch (inf->type) { case 0x00: break; case 0xE1: case 0xF1: case 0xF2: case 0xF3: case 0xF4: if (!inf->len) { fprintf(stderr, "warning: inode #%x: non-deleted object has zero length, skipping\n", ino); free(inf); return(0); } break; default: fprintf(stderr, "warning: inode #%x: unexpected object type %02X, skipping\n", ino, inf->type); free(inf); return(0); } if (convert_ptr(le16toh(fl->descend), &inf->descend) < 0) { fprintf(stderr, "warning: inode #%x: invalid descend pointer, skipping\n", ino); free(inf); return(0); } if (convert_ptr(le16toh(fl->sibling), &inf->sibling) < 0) { fprintf(stderr, "warning: inode #%x: invalid sibling pointer, skipping\n", ino); free(inf); return(0); } if (inf->len) { inf->rawloc = le32toh(fl->dataptr); if (old_16bit_location) inf->rawloc >>= 16; if (inf->rawloc > 0x0FFFFFFF) { invdptr: fprintf(stderr, "warning: inode #%x: invalid data pointer, skipping\n", ino); free(inf); return(0); } inf->offset = inf->rawloc << 4; if (inf->offset >= total_ffs_size) goto invdptr; if (inf->offset + inf->len > total_ffs_size) { fprintf(stderr, "warning: inode #%x: data pointer + length > FFS total size, skipping\n", ino); free(inf); return(0); } inf->dataptr = image + inf->offset; } inode_info[ino] = inf; return(1); } find_root_inode() { int ino; if (root_inode) { if (!validate_inode(root_inode)) { fprintf(stderr, "error: root inode specified with -r is invalid\n"); exit(1); } return(1); } for (ino = 1; ino < inode_limit; ino++) { if (!validate_inode(ino)) continue; if (inode_info[ino]->type != 0xF2) continue; if (*inode_info[ino]->dataptr != '/') continue; root_inode = ino; if (verbose) fprintf(stderr, "Found root inode at #%x\n", ino); if (inode_info[ino]->sibling) fprintf(stderr, "warning: root inode #%x has a non-null sibling pointer\n", ino); return(0); } fprintf(stderr, "error: no root inode found; try -r\n"); exit(1); }