FreeCalypso > hg > freecalypso-sw
view ffstools/tiffs-rd/inode.c @ 992:a7b0b426f9ca
target-utils: boot ROM UART autodetection revamped
The new implementation should work with both the familiar Calypso C035
boot ROM version found in our regular targets as well as the older
Calypso F741979B version found on the vintage D-Sample board.
author | Mychaela Falconia <falcon@ivan.Harhan.ORG> |
---|---|
date | Wed, 30 Dec 2015 21:28:41 +0000 |
parents | 024042383a26 |
children | 09b8b2327838 |
line wrap: on
line source
/* * 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 (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); }