--- /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) {
Code Review / packages / trusty / cirros-testvm.git / blobdiff