+++ /dev/null
-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) {
projects / buildroot.git / commitdiff