diff options
Diffstat (limited to 'package/cramfs/cramfs-01-endian.patch')
| -rw-r--r-- | package/cramfs/cramfs-01-endian.patch | 288 |
1 files changed, 288 insertions, 0 deletions
diff --git a/package/cramfs/cramfs-01-endian.patch b/package/cramfs/cramfs-01-endian.patch new file mode 100644 index 000000000..b2eda5a1d --- /dev/null +++ b/package/cramfs/cramfs-01-endian.patch @@ -0,0 +1,288 @@ +Index: cramfs-1.1/mkcramfs.c +=================================================================== +--- cramfs-1.1.orig/mkcramfs.c 2002-02-20 09:03:32.000000000 +0100 ++++ cramfs-1.1/mkcramfs.c 2011-09-09 15:11:00.980895119 +0200 +@@ -93,6 +93,7 @@ + static int opt_verbose = 0; + static char *opt_image = NULL; + static char *opt_name = NULL; ++static int swap_endian = 0; + + static int warn_dev, warn_gid, warn_namelen, warn_skip, warn_size, warn_uid; + +@@ -130,6 +131,8 @@ + " -i file insert a file image into the filesystem (requires >= 2.4.0)\n" + " -n name set name of cramfs filesystem\n" + " -p pad by %d bytes for boot code\n" ++ " -l litte endian filesystem\n" ++ " -b big endian filesystem\n" + " -s sort directory entries (old option, ignored)\n" + " -v be more verbose\n" + " -z make explicit holes (requires >= 2.3.39)\n" +@@ -372,6 +375,50 @@ + return totalsize; + } + ++/* routines to swap endianness/bitfields in inode/superblock block data */ ++static void fix_inode(struct cramfs_inode *inode) ++{ ++#define wswap(x) (((x)>>24) | (((x)>>8)&0xff00) | (((x)&0xff00)<<8) | (((x)&0xff)<<24)) ++ /* attempt #2 */ ++ inode->mode = (inode->mode >> 8) | ((inode->mode&0xff)<<8); ++ inode->uid = (inode->uid >> 8) | ((inode->uid&0xff)<<8); ++ inode->size = (inode->size >> 16) | (inode->size&0xff00) | ++ ((inode->size&0xff)<<16); ++ ((u32*)inode)[2] = wswap(inode->offset | (inode->namelen<<26)); ++} ++ ++static void fix_offset(struct cramfs_inode *inode, u32 offset) ++{ ++ u32 tmp = wswap(((u32*)inode)[2]); ++ ((u32*)inode)[2] = wswap((offset >> 2) | (tmp&0xfc000000)); ++} ++ ++static void fix_block_pointer(u32 *p) ++{ ++ *p = wswap(*p); ++} ++ ++static void fix_super(struct cramfs_super *super) ++{ ++ u32 *p = (u32*)super; ++ ++ /* fix superblock fields */ ++ p[0] = wswap(p[0]); /* magic */ ++ p[1] = wswap(p[1]); /* size */ ++ p[2] = wswap(p[2]); /* flags */ ++ p[3] = wswap(p[3]); /* future */ ++ ++ /* fix filesystem info fields */ ++ p = (u32*)&super->fsid; ++ p[0] = wswap(p[0]); /* crc */ ++ p[1] = wswap(p[1]); /* edition */ ++ p[2] = wswap(p[2]); /* blocks */ ++ p[3] = wswap(p[3]); /* files */ ++ ++ fix_inode(&super->root); ++#undef wswap ++} ++ + /* Returns sizeof(struct cramfs_super), which includes the root inode. */ + static unsigned int write_superblock(struct entry *root, char *base, int size) + { +@@ -405,6 +452,7 @@ + super->root.gid = root->gid; + super->root.size = root->size; + super->root.offset = offset >> 2; ++ if (swap_endian) fix_super(super); + + return offset; + } +@@ -419,7 +467,10 @@ + if (offset >= (1 << (2 + CRAMFS_OFFSET_WIDTH))) { + die(MKFS_ERROR, 0, "filesystem too big"); + } +- inode->offset = (offset >> 2); ++ if (swap_endian) ++ fix_offset(inode, offset); ++ else ++ inode->offset = (offset >> 2); + } + + /* +@@ -515,6 +566,7 @@ + stack_entries++; + } + entry = entry->next; ++ if (swap_endian) fix_inode(inode); + } + + /* +@@ -609,6 +661,7 @@ + } + + *(u32 *) (base + offset) = curr; ++ if (swap_endian) fix_block_pointer((u32*)(base + offset)); + offset += 4; + } while (size); + +@@ -699,7 +752,7 @@ + progname = argv[0]; + + /* command line options */ +- while ((c = getopt(argc, argv, "hEe:i:n:psvz")) != EOF) { ++ while ((c = getopt(argc, argv, "hEe:i:n:psvzlb")) != EOF) { + switch (c) { + case 'h': + usage(MKFS_OK); +@@ -727,6 +780,18 @@ + opt_pad = PAD_SIZE; + fslen_ub += PAD_SIZE; + break; ++ case 'b': ++#if __BYTE_ORDER == __LITTLE_ENDIAN ++ swap_endian = 1; ++ printf("Swapping filesystem endian-ness\n"); ++#endif ++ break; ++ case 'l': ++#if __BYTE_ORDER == __BIG_ENDIAN ++ swap_endian = 1; ++ printf("Swapping filesystem endian-ness\n"); ++#endif ++ break; + case 's': + /* old option, ignored */ + break; +Index: cramfs-1.1/cramfsck.c +=================================================================== +--- cramfs-1.1.orig/cramfsck.c 2002-02-23 01:00:42.000000000 +0100 ++++ cramfs-1.1/cramfsck.c 2011-09-09 15:10:06.810894275 +0200 +@@ -30,6 +30,7 @@ + * 2000/07/15: Daniel Quinlan (initial support for block devices) + * 2002/01/10: Daniel Quinlan (additional checks, test more return codes, + * use read if mmap fails, standardize messages) ++ * 2004/09/01: Alfonso Acosta (Add swapping support) + */ + + /* compile-time options */ +@@ -53,6 +54,7 @@ + #define _LINUX_STRING_H_ + #include <linux/fs.h> + #include <linux/cramfs_fs.h> ++#include <byteswap.h> + #include <zlib.h> + + /* Exit codes used by fsck-type programs */ +@@ -73,6 +75,7 @@ + static char *filename; /* ROM image filename */ + struct cramfs_super super; /* just find the cramfs superblock once */ + static int opt_verbose = 0; /* 1 = verbose (-v), 2+ = very verbose (-vv) */ ++static int need_swapping = 0; /* fs and host dont have the same endianness */ + #ifdef INCLUDE_FS_TESTS + static int opt_extract = 0; /* extract cramfs (-x) */ + static char *extract_dir = "root"; /* extraction directory (-x) */ +@@ -84,6 +87,9 @@ + static unsigned long start_data = ~0UL; /* start of the data (256 MB = max) */ + static unsigned long end_data = 0; /* end of the data */ + ++/* access 32 byte variables */ ++#define CRAMFS_32(x) (need_swapping ? bswap_32(x) : x) ++ + /* Guarantee access to at least 8kB at a time */ + #define ROMBUFFER_BITS 13 + #define ROMBUFFERSIZE (1 << ROMBUFFER_BITS) +@@ -165,20 +171,34 @@ + if (super.magic == CRAMFS_MAGIC) { + *start = 0; + } ++ else if (super.magic == bswap_32(CRAMFS_MAGIC)) { ++ *start = 0; ++ need_swapping = 1; ++ } ++ + else if (*length >= (PAD_SIZE + sizeof(super))) { + lseek(fd, PAD_SIZE, SEEK_SET); + if (read(fd, &super, sizeof(super)) != sizeof(super)) { + die(FSCK_ERROR, 1, "read failed: %s", filename); + } +- if (super.magic == CRAMFS_MAGIC) { ++ if (super.magic == CRAMFS_32(CRAMFS_MAGIC)) { + *start = PAD_SIZE; + } + } + + /* superblock tests */ +- if (super.magic != CRAMFS_MAGIC) { ++ if (super.magic != CRAMFS_32(CRAMFS_MAGIC)) { + die(FSCK_UNCORRECTED, 0, "superblock magic not found"); + } ++ if (need_swapping){ ++ super.size = bswap_32(super.size); ++ super.flags = bswap_32(super.flags); ++ super.future = bswap_32(super.future); ++ super.fsid.crc = bswap_32(super.fsid.crc); ++ super.fsid.edition = bswap_32(super.fsid.edition); ++ super.fsid.blocks = bswap_32(super.fsid.blocks); ++ super.fsid.files = bswap_32(super.fsid.files); ++ } + if (super.flags & ~CRAMFS_SUPPORTED_FLAGS) { + die(FSCK_ERROR, 0, "unsupported filesystem features"); + } +@@ -213,7 +233,10 @@ + die(FSCK_USAGE, 0, "unable to test CRC: old cramfs format"); + #endif /* not INCLUDE_FS_TESTS */ + } +- ++ else if (need_swapping) { ++ /* crc checking in this case would mean translating the whole file */ ++ return; ++ } + crc = crc32(0L, Z_NULL, 0); + + buf = mmap(NULL, super.size, PROT_READ | PROT_WRITE, MAP_PRIVATE, fd, 0); +@@ -298,12 +321,23 @@ + + static struct cramfs_inode *cramfs_iget(struct cramfs_inode * i) + { ++#define wswap(x) (((x)>>24) | (((x)>>8)&0xff00) | (((x)&0xff00)<<8) | (((x)&0xff)<<24)) + struct cramfs_inode *inode = malloc(sizeof(struct cramfs_inode)); + + if (!inode) { + die(FSCK_ERROR, 1, "malloc failed"); + } +- *inode = *i; ++ if(!need_swapping) { ++ *inode = *i; ++ } ++ else { ++ inode->mode=bswap_16(i->mode); ++ inode->uid=bswap_16(i->uid); ++ inode->size=bswap_32(i->size << 8); ++ inode->gid=i->gid; ++ inode->namelen = bswap_32(((u32*)i)[2]) >> 26; ++ inode->offset = bswap_32(((u32*)i)[2]) & 0x3FFFFFFF; ++ } + return inode; + } + +@@ -322,9 +356,9 @@ + */ + static struct cramfs_inode *read_super(void) + { +- unsigned long offset = super.root.offset << 2; +- +- if (!S_ISDIR(super.root.mode)) ++ struct cramfs_inode *root = cramfs_iget(&super.root); ++ unsigned long offset = root->offset << 2; ++ if (!S_ISDIR(root->mode)) + die(FSCK_UNCORRECTED, 0, "root inode is not directory"); + if (!(super.flags & CRAMFS_FLAG_SHIFTED_ROOT_OFFSET) && + ((offset != sizeof(struct cramfs_super)) && +@@ -332,7 +366,7 @@ + { + die(FSCK_UNCORRECTED, 0, "bad root offset (%lu)", offset); + } +- return cramfs_iget(&super.root); ++ return root; + } + + static int uncompress_block(void *src, int len) +@@ -364,7 +398,7 @@ + + do { + unsigned long out = PAGE_CACHE_SIZE; +- unsigned long next = *(u32 *) romfs_read(offset); ++ unsigned long next = CRAMFS_32(*(u32 *) romfs_read(offset)); + + if (next > end_data) { + end_data = next; +@@ -525,7 +559,7 @@ + { + unsigned long offset = i->offset << 2; + unsigned long curr = offset + 4; +- unsigned long next = *(u32 *) romfs_read(offset); ++ unsigned long next = CRAMFS_32(*(u32 *) romfs_read(offset)); + unsigned long size; + + if (offset == 0) { |