Update cramfs to handle switching endianness when necessary
This commit is contained in:
Eric Andersen
parent
2badd4b3e5
commit
483fa88f3e
125
target/cramfs/cramfs-02-endian.patch
Normal file
125
target/cramfs/cramfs-02-endian.patch
Normal file
@ -0,0 +1,125 @@
|
||||
--- cramfs-1.1/mkcramfs.c.orig 2005-04-13 05:55:57.000000000 -0600
|
||||
+++ cramfs-1.1/mkcramfs.c 2005-04-13 16:19:57.000000000 -0600
|
||||
@@ -117,6 +117,7 @@
|
||||
static int opt_squash = 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;
|
||||
static const char *const memory_exhausted = "memory exhausted";
|
||||
@@ -155,6 +156,7 @@
|
||||
" -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"
|
||||
+ " -r reverse endian-ness of filesystem\n"
|
||||
" -s sort directory entries (old option, ignored)\n"
|
||||
" -v be more verbose\n"
|
||||
" -z make explicit holes (requires >= 2.3.39)\n"
|
||||
@@ -504,6 +506,50 @@
|
||||
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)
|
||||
{
|
||||
@@ -539,6 +585,7 @@
|
||||
super->root.gid = root->gid;
|
||||
super->root.size = root->size;
|
||||
super->root.offset = offset >> 2;
|
||||
+ if (swap_endian) fix_super(super);
|
||||
|
||||
return offset;
|
||||
}
|
||||
@@ -553,7 +600,10 @@
|
||||
if (offset >= (1 << (2 + CRAMFS_OFFSET_WIDTH))) {
|
||||
error_msg_and_die("filesystem too big");
|
||||
}
|
||||
- inode->offset = (offset >> 2);
|
||||
+ if (swap_endian)
|
||||
+ fix_offset(inode, offset);
|
||||
+ else
|
||||
+ inode->offset = (offset >> 2);
|
||||
}
|
||||
|
||||
/*
|
||||
@@ -638,6 +688,7 @@
|
||||
stack_entries++;
|
||||
}
|
||||
entry = entry->next;
|
||||
+ if (swap_endian) fix_inode(inode);
|
||||
}
|
||||
|
||||
/*
|
||||
@@ -734,6 +785,7 @@
|
||||
}
|
||||
|
||||
*(u32 *) (base + offset) = curr;
|
||||
+ if (swap_endian) fix_block_pointer((u32*)(base + offset));
|
||||
offset += 4;
|
||||
} while (size);
|
||||
|
||||
@@ -1146,7 +1198,7 @@
|
||||
progname = argv[0];
|
||||
|
||||
/* command line options */
|
||||
- while ((c = getopt(argc, argv, "hEe:i:n:psvzD:q")) != EOF) {
|
||||
+ while ((c = getopt(argc, argv, "hEe:i:n:prsvzD:q")) != EOF) {
|
||||
switch (c) {
|
||||
case 'h':
|
||||
usage(MKFS_OK);
|
||||
@@ -1174,6 +1226,10 @@
|
||||
opt_pad = PAD_SIZE;
|
||||
fslen_ub += PAD_SIZE;
|
||||
break;
|
||||
+ case 'r':
|
||||
+ swap_endian = 1;
|
||||
+ printf("Swapping filesystem endian-ness\n");
|
||||
+ break;
|
||||
case 's':
|
||||
/* old option, ignored */
|
||||
break;
|
||||
@ -33,13 +33,32 @@ cramfs-dirclean:
|
||||
# Build the cramfs root filesystem image
|
||||
#
|
||||
#############################################################
|
||||
ifeq ($(strip $(BR2_armeb)),y)
|
||||
CRAMFS_ENDIANNESS=-r
|
||||
endif
|
||||
ifeq ($(strip $(BR2_mips)),y)
|
||||
CRAMFS_ENDIANNESS=-r
|
||||
endif
|
||||
ifeq ($(strip $(BR2_powerpc)),y)
|
||||
CRAMFS_ENDIANNESS=-r
|
||||
endif
|
||||
ifeq ($(strip $(BR2_sh3eb)),y)
|
||||
CRAMFS_ENDIANNESS=-r
|
||||
endif
|
||||
ifeq ($(strip $(BR2_sh4eb)),y)
|
||||
CRAMFS_ENDIANNESS=-r
|
||||
endif
|
||||
ifeq ($(strip $(BR2_sparc)),y)
|
||||
CRAMFS_ENDIANNESS=-r
|
||||
endif
|
||||
|
||||
cramfsroot: cramfs
|
||||
#-@find $(TARGET_DIR)/lib -type f -name \*.so\* | xargs $(STRIP) --strip-unneeded 2>/dev/null || true;
|
||||
-@find $(TARGET_DIR) -type f -perm +111 | xargs $(STRIP) 2>/dev/null || true;
|
||||
@rm -rf $(TARGET_DIR)/usr/man
|
||||
@rm -rf $(TARGET_DIR)/usr/info
|
||||
$(CRAMFS_DIR)/mkcramfs -q -D target/generic/device_table.txt $(TARGET_DIR) $(IMAGE).cramfs
|
||||
$(CRAMFS_DIR)/mkcramfs -q $(CRAMFS_ENDIANNESS) -D \
|
||||
target/generic/device_table.txt $(TARGET_DIR) $(IMAGE).cramfs
|
||||
|
||||
cramfsroot-source: cramfs-source
|
||||
|
||||
|
||||
Loading…
Reference in New Issue
Block a user