mirror of https://github.com/hak5/openwrt-owl.git
118 lines
3.2 KiB
Diff
118 lines
3.2 KiB
Diff
--- a/scripts/gen_initramfs_list.sh
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+++ b/scripts/gen_initramfs_list.sh
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@@ -287,7 +287,7 @@
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if [ "${is_cpio_compressed}" = "compressed" ]; then
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cat ${cpio_tfile} > ${output_file}
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else
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- cat ${cpio_tfile} | gzip -f -9 - > ${output_file}
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+ lzma e -lc1 -lp2 -pb2 ${cpio_tfile} ${output_file}
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fi
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[ -z ${cpio_file} ] && rm ${cpio_tfile}
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fi
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--- a/init/initramfs.c
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+++ b/init/initramfs.c
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@@ -441,6 +441,69 @@
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outcnt = 0;
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}
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+#include <linux/LzmaDecode.h>
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+static int __init lzma_unzip(void)
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+{
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+ unsigned int i; /* temp value */
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+ unsigned int lc; /* literal context bits */
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+ unsigned int lp; /* literal pos state bits */
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+ unsigned int pb; /* pos state bits */
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+ unsigned int osize; /* uncompressed size */
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+ unsigned char *workspace;
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+ unsigned char* outputbuffer;
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+ unsigned int outsizeProcessed = 0;
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+ int workspace_size;
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+ int res;
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+
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+ // lzma args
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+ i = get_byte();
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+ lc = i % 9, i = i / 9;
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+ lp = i % 5, pb = i / 5;
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+
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+ // skip dictionary size
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+ for (i = 0; i < 4; i++)
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+ get_byte();
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+
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+ /* read the lower half of uncompressed size in the header */
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+ osize = ((unsigned int)get_byte()) +
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+ ((unsigned int)get_byte() << 8) +
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+ ((unsigned int)get_byte() << 16) +
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+ ((unsigned int)get_byte() << 24);
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+
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+ /* skip rest of the header (upper half of uncompressed size) */
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+ for (i = 0; i < 4; i++)
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+ get_byte();
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+
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+ workspace_size = ((LZMA_BASE_SIZE + (LZMA_LIT_SIZE << (lc + lp))) * sizeof(CProb)) + 100;
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+ printk( KERN_NOTICE "initramfs: LZMA lc=%d,lp=%d,pb=%d,origSize=%d\n",
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+ lc,lp,pb,osize);
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+ outputbuffer = kmalloc(osize, GFP_KERNEL);
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+ if (outputbuffer == 0) {
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+ printk(KERN_ERR "initramfs: Couldn't allocate lzma output buffer\n");
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+ return -1;
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+ }
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+
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+ workspace = kmalloc(workspace_size, GFP_KERNEL);
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+ if (workspace == NULL) {
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+ printk(KERN_ERR "initramfs: Couldn't allocate lzma workspace\n");
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+ return -1;
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+ }
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+
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+ res = LzmaDecode(workspace, workspace_size, lc, lp, pb, inbuf + inptr, insize - inptr, outputbuffer, osize, &outsizeProcessed);
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+ if( res != 0 ) {
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+ panic( KERN_ERR "initramfs: Lzma decode failure\n");
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+ return -1;
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+ }
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+
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+ flush_buffer(outputbuffer, outsizeProcessed);
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+ inptr = insize;
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+
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+ kfree(outputbuffer);
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+ kfree(workspace);
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+ state = Reset;
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+ return 0;
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+}
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+
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static char * __init unpack_to_rootfs(char *buf, unsigned len, int check_only)
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{
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int written;
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@@ -475,12 +538,28 @@
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inptr = 0;
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outcnt = 0; /* bytes in output buffer */
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bytes_out = 0;
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- crc = (ulg)0xffffffffL; /* shift register contents */
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- makecrc();
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- gunzip();
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- if (state != Reset)
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+ if( inbuf[0] == 037 && ((inbuf[1] == 0213) || (inbuf[1] == 0236)))
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+ {
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+ printk( KERN_NOTICE "detected gzip initramfs\n");
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+ crc = (ulg)0xffffffffL; /* shift register contents */
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+ makecrc();
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+ gunzip();
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+ if (state != Reset)
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error("junk in gzipped archive");
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- this_header = saved_offset + inptr;
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+ }
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+ else if(!memcmp(inbuf+1, "\x00\x00\x80\x00", 4)) /* FIXME: hardcoded dictionary size */
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+ {
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+ printk( KERN_NOTICE "detected lzma initramfs\n");
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+ lzma_unzip();
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+ }
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+ else
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+ {
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+ // skip forward ?
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+ crc = (ulg)0xffffffffL; /* shift register contents */
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+ makecrc();
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+ gunzip();
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+ }
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+ this_header = saved_offset + inptr;
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buf += inptr;
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len -= inptr;
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}
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