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-rw-r--r--patches/source/squashfs-tools/0004-unsquashfs-add-support-for-LZMA-magics.patch102
1 files changed, 102 insertions, 0 deletions
diff --git a/patches/source/squashfs-tools/0004-unsquashfs-add-support-for-LZMA-magics.patch b/patches/source/squashfs-tools/0004-unsquashfs-add-support-for-LZMA-magics.patch
new file mode 100644
index 00000000..258416bf
--- /dev/null
+++ b/patches/source/squashfs-tools/0004-unsquashfs-add-support-for-LZMA-magics.patch
@@ -0,0 +1,102 @@
+From c2dc60a94b01a1fff4a22db1c0569651afa6c959 Mon Sep 17 00:00:00 2001
+From: Jonas Gorski <jonas.gorski@gmail.com>
+Date: Wed, 19 Oct 2011 11:44:57 +0200
+Subject: [PATCH] unsquashfs: add support for LZMA magics
+X-Face: z*RaLf`X<@C75u6Ig9}{oW$H;1_\2t5)({*|jhM<pyWR#k60!#=#>/Vb;]yA5<GWI5`6u&+
+ ;6b'@y|8w"wB;4/e!7wYYrcqdJFY,~%Gk_4]cq$Ei/7<j&N3ah(m`ku?pX.&+~:_/wC~dwn^)MizBG
+ !pE^+iDQQ1yC6^,)YDKkxDd!T>\I~93>J<_`<4)A{':UrE
+
+Some vendor (e.g. Thomson/Technicolor) use a different super block magic
+to indicate LZMA compression:
+
+ qshs (0x71736873) - LZMA compression
+ shsq (0x73687371) - LZMA compression, SWAPPED fields
+
+Add support for detecting this and enable extraction for filesystems
+from those firmwares.
+
+Signed-off-by: Jonas Gorski <jonas.gorski@gmail.com>
+Tested-by: Antonio Ospite <ospite@studenti.unina.it>
+---
+ squashfs-tools/squashfs_fs.h | 6 ++++++
+ squashfs-tools/unsquashfs.c | 24 ++++++++++++++++++------
+ 2 files changed, 24 insertions(+), 6 deletions(-)
+
+diff --git a/squashfs-tools/squashfs_fs.h b/squashfs-tools/squashfs_fs.h
+index d4fba1b..8462a6b 100644
+--- a/squashfs-tools/squashfs_fs.h
++++ b/squashfs-tools/squashfs_fs.h
+@@ -30,6 +30,12 @@
+ #define SQUASHFS_MAGIC_SWAP 0x68737173
+ #define SQUASHFS_START 0
+
++/*
++ * Squashfs + LZMA
++ */
++#define SQUASHFS_MAGIC_LZMA 0x71736873
++#define SQUASHFS_MAGIC_LZMA_SWAP 0x73687371
++
+ /* size of metadata (inode and directory) blocks */
+ #define SQUASHFS_METADATA_SIZE 8192
+ #define SQUASHFS_METADATA_LOG 13
+diff --git a/squashfs-tools/unsquashfs.c b/squashfs-tools/unsquashfs.c
+index 320bead..7869a38 100644
+--- a/squashfs-tools/unsquashfs.c
++++ b/squashfs-tools/unsquashfs.c
+@@ -1516,10 +1516,12 @@ int read_super(char *source)
+ */
+ read_fs_bytes(fd, SQUASHFS_START, sizeof(struct squashfs_super_block),
+ &sBlk_4);
+- swap = sBlk_4.s_magic != SQUASHFS_MAGIC;
++ swap = (sBlk_4.s_magic != SQUASHFS_MAGIC &&
++ sBlk_4.s_magic != SQUASHFS_MAGIC_LZMA);
+ SQUASHFS_INSWAP_SUPER_BLOCK(&sBlk_4);
+
+- if(sBlk_4.s_magic == SQUASHFS_MAGIC && sBlk_4.s_major == 4 &&
++ if((sBlk_4.s_magic == SQUASHFS_MAGIC ||
++ sBlk_4.s_magic == SQUASHFS_MAGIC_LZMA) && sBlk_4.s_major == 4 &&
+ sBlk_4.s_minor == 0) {
+ s_ops.squashfs_opendir = squashfs_opendir_4;
+ s_ops.read_fragment = read_fragment_4;
+@@ -1532,7 +1534,11 @@ int read_super(char *source)
+ /*
+ * Check the compression type
+ */
+- comp = lookup_compressor_id(sBlk.s.compression);
++ if (sBlk_4.s_magic == SQUASHFS_MAGIC_LZMA)
++ comp = lookup_compressor("lzma");
++ else
++ comp = lookup_compressor_id(sBlk.s.compression);
++
+ return TRUE;
+ }
+
+@@ -1547,8 +1553,10 @@ int read_super(char *source)
+ * Check it is a SQUASHFS superblock
+ */
+ swap = 0;
+- if(sBlk_3.s_magic != SQUASHFS_MAGIC) {
+- if(sBlk_3.s_magic == SQUASHFS_MAGIC_SWAP) {
++ if(sBlk_3.s_magic != SQUASHFS_MAGIC &&
++ sBlk_3.s_magic != SQUASHFS_MAGIC_LZMA) {
++ if(sBlk_3.s_magic == SQUASHFS_MAGIC_SWAP ||
++ sBlk_3.s_magic == SQUASHFS_MAGIC_LZMA_SWAP) {
+ squashfs_super_block_3 sblk;
+ ERROR("Reading a different endian SQUASHFS filesystem "
+ "on %s\n", source);
+@@ -1626,7 +1634,11 @@ int read_super(char *source)
+ /*
+ * 1.x, 2.x and 3.x filesystems use gzip compression.
+ */
+- comp = lookup_compressor("gzip");
++ if (sBlk.s.s_magic == SQUASHFS_MAGIC_LZMA)
++ comp = lookup_compressor("lzma");
++ else
++ comp = lookup_compressor("gzip");
++
+ return TRUE;
+
+ failed_mount:
+--
+1.7.10.4
+