--- /dev/null
+diff -purN linux-2.6.27.6/arch/arm/boot/compressed/Makefile linux-2.6.27.6udpcast/arch/arm/boot/compressed/Makefile
+--- linux-2.6.27.6/arch/arm/boot/compressed/Makefile 2008-11-13 18:56:21.000000000 +0100
++++ linux-2.6.27.6udpcast/arch/arm/boot/compressed/Makefile 2008-11-16 23:02:55.000000000 +0100
+@@ -67,8 +67,15 @@ endif
+
+ SEDFLAGS = s/TEXT_START/$(ZTEXTADDR)/;s/BSS_START/$(ZBSSADDR)/
+
+-targets := vmlinux vmlinux.lds piggy.gz piggy.o font.o font.c \
+- head.o misc.o $(OBJS)
++suffix_$(CONFIG_KERNEL_GZIP) = gz
++suffix_$(CONFIG_KERNEL_BZIP2) = bz2
++suffix_$(CONFIG_KERNEL_LZMA) = lzma
++
++targets := vmlinux vmlinux.lds \
++ piggy.gz piggy.gz.o \
++ piggy.bz2 piggy.bz2.o \
++ piggy.lzma piggy.lzma.o \
++ font.o font.c head.o misc.o $(OBJS)
+
+ ifeq ($(CONFIG_FTRACE),y)
+ ORIG_CFLAGS := $(KBUILD_CFLAGS)
+@@ -95,7 +102,7 @@ LDFLAGS_vmlinux += -p --no-undefined -X
+ # would otherwise mess up our GOT table
+ CFLAGS_misc.o := -Dstatic=
+
+-$(obj)/vmlinux: $(obj)/vmlinux.lds $(obj)/$(HEAD) $(obj)/piggy.o \
++$(obj)/vmlinux: $(obj)/vmlinux.lds $(obj)/$(HEAD) $(obj)/piggy.$(suffix_y).o \
+ $(addprefix $(obj)/, $(OBJS)) FORCE
+ $(call if_changed,ld)
+ @:
+@@ -103,7 +110,17 @@ $(obj)/vmlinux: $(obj)/vmlinux.lds $(obj
+ $(obj)/piggy.gz: $(obj)/../Image FORCE
+ $(call if_changed,gzip)
+
+-$(obj)/piggy.o: $(obj)/piggy.gz FORCE
++$(obj)/piggy.bz2: $(obj)/../Image FORCE
++ $(call if_changed,bzip2)
++
++$(obj)/piggy.lzma: $(obj)/../Image FORCE
++ $(call if_changed,lzma)
++
++$(obj)/piggy.gz.o: $(obj)/piggy.gz FORCE
++
++$(obj)/piggy.bz2.o: $(obj)/piggy.bz2 FORCE
++
++$(obj)/piggy.lzma.o: $(obj)/piggy.lzma FORCE
+
+ CFLAGS_font.o := -Dstatic=
+
+diff -purN linux-2.6.27.6/arch/arm/boot/compressed/misc.c linux-2.6.27.6udpcast/arch/arm/boot/compressed/misc.c
+--- linux-2.6.27.6/arch/arm/boot/compressed/misc.c 2008-11-13 18:56:21.000000000 +0100
++++ linux-2.6.27.6udpcast/arch/arm/boot/compressed/misc.c 2008-11-16 23:02:55.000000000 +0100
+@@ -169,116 +169,34 @@ static inline __ptr_t memcpy(__ptr_t __d
+ /*
+ * gzip delarations
+ */
+-#define OF(args) args
+ #define STATIC static
+
+-typedef unsigned char uch;
+-typedef unsigned short ush;
+ typedef unsigned long ulg;
+
+-#define WSIZE 0x8000 /* Window size must be at least 32k, */
+- /* and a power of two */
+-
+-static uch *inbuf; /* input buffer */
+-static uch window[WSIZE]; /* Sliding window buffer */
+-
+-static unsigned insize; /* valid bytes in inbuf */
+-static unsigned inptr; /* index of next byte to be processed in inbuf */
+-static unsigned outcnt; /* bytes in output buffer */
+-
+-/* gzip flag byte */
+-#define ASCII_FLAG 0x01 /* bit 0 set: file probably ascii text */
+-#define CONTINUATION 0x02 /* bit 1 set: continuation of multi-part gzip file */
+-#define EXTRA_FIELD 0x04 /* bit 2 set: extra field present */
+-#define ORIG_NAME 0x08 /* bit 3 set: original file name present */
+-#define COMMENT 0x10 /* bit 4 set: file comment present */
+-#define ENCRYPTED 0x20 /* bit 5 set: file is encrypted */
+-#define RESERVED 0xC0 /* bit 6,7: reserved */
+-
+-#define get_byte() (inptr < insize ? inbuf[inptr++] : fill_inbuf())
+-
+-/* Diagnostic functions */
+-#ifdef DEBUG
+-# define Assert(cond,msg) {if(!(cond)) error(msg);}
+-# define Trace(x) fprintf x
+-# define Tracev(x) {if (verbose) fprintf x ;}
+-# define Tracevv(x) {if (verbose>1) fprintf x ;}
+-# define Tracec(c,x) {if (verbose && (c)) fprintf x ;}
+-# define Tracecv(c,x) {if (verbose>1 && (c)) fprintf x ;}
+-#else
+-# define Assert(cond,msg)
+-# define Trace(x)
+-# define Tracev(x)
+-# define Tracevv(x)
+-# define Tracec(c,x)
+-# define Tracecv(c,x)
+-#endif
+-
+-static int fill_inbuf(void);
+-static void flush_window(void);
+-static void error(char *m);
+-
+ extern char input_data[];
+ extern char input_data_end[];
+
+-static uch *output_data;
+-static ulg output_ptr;
+-static ulg bytes_out;
+-
+ static void error(char *m);
+
+-static void putstr(const char *);
+-
+-extern int end;
+ static ulg free_mem_ptr;
+ static ulg free_mem_end_ptr;
+
+-#ifdef STANDALONE_DEBUG
+-#define NO_INFLATE_MALLOC
+-#endif
+-
+ #define ARCH_HAS_DECOMP_WDOG
++#define NEW_CODE
+
++#ifdef CONFIG_KERNEL_GZIP
+ #include "../../../../lib/inflate.c"
++#endif
+
+-/* ===========================================================================
+- * Fill the input buffer. This is called only when the buffer is empty
+- * and at least one byte is really needed.
+- */
+-int fill_inbuf(void)
+-{
+- if (insize != 0)
+- error("ran out of input data");
++#ifdef CONFIG_KERNEL_BZIP2
++#include "../../../../lib/decompress_bunzip2.c"
++#endif
+
+- inbuf = input_data;
+- insize = &input_data_end[0] - &input_data[0];
++#ifdef CONFIG_KERNEL_LZMA
++#include "../../../../lib/decompress_unlzma.c"
++#endif
+
+- inptr = 1;
+- return inbuf[0];
+-}
+
+-/* ===========================================================================
+- * Write the output window window[0..outcnt-1] and update crc and bytes_out.
+- * (Used for the decompressed data only.)
+- */
+-void flush_window(void)
+-{
+- ulg c = crc;
+- unsigned n;
+- uch *in, *out, ch;
+-
+- in = window;
+- out = &output_data[output_ptr];
+- for (n = 0; n < outcnt; n++) {
+- ch = *out++ = *in++;
+- c = crc_32_tab[((int)c ^ ch) & 0xff] ^ (c >> 8);
+- }
+- crc = c;
+- bytes_out += (ulg)outcnt;
+- output_ptr += (ulg)outcnt;
+- outcnt = 0;
+- putstr(".");
+-}
+
+ #ifndef arch_error
+ #define arch_error(x)
+@@ -301,16 +219,24 @@ ulg
+ decompress_kernel(ulg output_start, ulg free_mem_ptr_p, ulg free_mem_ptr_end_p,
+ int arch_id)
+ {
+- output_data = (uch *)output_start; /* Points to kernel start */
+- free_mem_ptr = free_mem_ptr_p;
+- free_mem_end_ptr = free_mem_ptr_end_p;
++ ulg output_ptr;
++ ulg *ptr;
++ size_t input_len = input_data_end - input_data;
++ size_t pos = 0;
++
+ __machine_arch_type = arch_id;
+
+ arch_decomp_setup();
+
+- makecrc();
+- putstr("Uncompressing Linux...");
+- gunzip();
++ ptr = (ulg *) (((long)input_data_end) - 4);
++ output_ptr = output_start + *ptr;
++
++ free_mem_ptr = output_ptr;
++ free_mem_end_ptr = output_ptr + 0x4000000;
++
++ putstr("Decompressing Linux...");
++ decompress(input_data, input_len,
++ NULL, NULL, (unsigned char *) output_start, &pos, error);
+ putstr(" done, booting the kernel.\n");
+ return output_ptr;
+ }
+@@ -320,11 +246,8 @@ char output_buffer[1500*1024];
+
+ int main()
+ {
+- output_data = output_buffer;
+-
+- makecrc();
+ putstr("Uncompressing Linux...");
+- gunzip();
++ decompress(input_data, input_len, NULL, output_buffer, NULL);
+ putstr("done.\n");
+ return 0;
+ }
+diff -purN linux-2.6.27.6/arch/x86/boot/compressed/Makefile linux-2.6.27.6udpcast/arch/x86/boot/compressed/Makefile
+--- linux-2.6.27.6/arch/x86/boot/compressed/Makefile 2008-11-13 18:56:21.000000000 +0100
++++ linux-2.6.27.6udpcast/arch/x86/boot/compressed/Makefile 2008-11-16 23:42:51.000000000 +0100
+@@ -4,7 +4,7 @@
+ # create a compressed vmlinux image from the original vmlinux
+ #
+
+-targets := vmlinux vmlinux.bin vmlinux.bin.gz head_$(BITS).o misc.o piggy.o
++targets := vmlinux vmlinux.bin vmlinux.bin.gz vmlinux.bin.bz2 vmlinux.bin.lzma head_$(BITS).o misc.o piggy.o
+
+ KBUILD_CFLAGS := -m$(BITS) -D__KERNEL__ $(LINUX_INCLUDE) -O2
+ KBUILD_CFLAGS += -fno-strict-aliasing -fPIC
+@@ -46,9 +46,17 @@ $(obj)/vmlinux.bin.all: $(vmlinux.bin.al
+ ifdef CONFIG_RELOCATABLE
+ $(obj)/vmlinux.bin.gz: $(obj)/vmlinux.bin.all FORCE
+ $(call if_changed,gzip)
++$(obj)/vmlinux.bin.bz2: $(obj)/vmlinux.bin.all FORCE
++ $(call if_changed,bzip2)
++$(obj)/vmlinux.bin.lzma: $(obj)/vmlinux.bin.all FORCE
++ $(call if_changed,lzma)
+ else
+ $(obj)/vmlinux.bin.gz: $(obj)/vmlinux.bin FORCE
+ $(call if_changed,gzip)
++$(obj)/vmlinux.bin.bz2: $(obj)/vmlinux.bin FORCE
++ $(call if_changed,bzip2)
++$(obj)/vmlinux.bin.lzma: $(obj)/vmlinux.bin FORCE
++ $(call if_changed,lzma)
+ endif
+ LDFLAGS_piggy.o := -r --format binary --oformat elf32-i386 -T
+
+@@ -59,6 +67,9 @@ $(obj)/vmlinux.bin.gz: $(obj)/vmlinux.bi
+ LDFLAGS_piggy.o := -r --format binary --oformat elf64-x86-64 -T
+ endif
+
++suffix_$(CONFIG_KERNEL_GZIP) = gz
++suffix_$(CONFIG_KERNEL_BZIP2) = bz2
++suffix_$(CONFIG_KERNEL_LZMA) = lzma
+
+-$(obj)/piggy.o: $(obj)/vmlinux.scr $(obj)/vmlinux.bin.gz FORCE
++$(obj)/piggy.o: $(obj)/vmlinux.scr $(obj)/vmlinux.bin.$(suffix_y) FORCE
+ $(call if_changed,ld)
+diff -purN linux-2.6.27.6/arch/x86/boot/compressed/misc.c linux-2.6.27.6udpcast/arch/x86/boot/compressed/misc.c
+--- linux-2.6.27.6/arch/x86/boot/compressed/misc.c 2008-11-13 18:56:21.000000000 +0100
++++ linux-2.6.27.6udpcast/arch/x86/boot/compressed/misc.c 2008-11-16 23:02:55.000000000 +0100
+@@ -116,71 +116,13 @@
+ /*
+ * gzip declarations
+ */
+-
+-#define OF(args) args
+ #define STATIC static
+
+ #undef memset
+ #undef memcpy
+ #define memzero(s, n) memset((s), 0, (n))
+
+-typedef unsigned char uch;
+-typedef unsigned short ush;
+-typedef unsigned long ulg;
+-
+-/*
+- * Window size must be at least 32k, and a power of two.
+- * We don't actually have a window just a huge output buffer,
+- * so we report a 2G window size, as that should always be
+- * larger than our output buffer:
+- */
+-#define WSIZE 0x80000000
+
+-/* Input buffer: */
+-static unsigned char *inbuf;
+-
+-/* Sliding window buffer (and final output buffer): */
+-static unsigned char *window;
+-
+-/* Valid bytes in inbuf: */
+-static unsigned insize;
+-
+-/* Index of next byte to be processed in inbuf: */
+-static unsigned inptr;
+-
+-/* Bytes in output buffer: */
+-static unsigned outcnt;
+-
+-/* gzip flag byte */
+-#define ASCII_FLAG 0x01 /* bit 0 set: file probably ASCII text */
+-#define CONTINUATION 0x02 /* bit 1 set: continuation of multi-part gz file */
+-#define EXTRA_FIELD 0x04 /* bit 2 set: extra field present */
+-#define ORIG_NAM 0x08 /* bit 3 set: original file name present */
+-#define COMMENT 0x10 /* bit 4 set: file comment present */
+-#define ENCRYPTED 0x20 /* bit 5 set: file is encrypted */
+-#define RESERVED 0xC0 /* bit 6, 7: reserved */
+-
+-#define get_byte() (inptr < insize ? inbuf[inptr++] : fill_inbuf())
+-
+-/* Diagnostic functions */
+-#ifdef DEBUG
+-# define Assert(cond, msg) do { if (!(cond)) error(msg); } while (0)
+-# define Trace(x) do { fprintf x; } while (0)
+-# define Tracev(x) do { if (verbose) fprintf x ; } while (0)
+-# define Tracevv(x) do { if (verbose > 1) fprintf x ; } while (0)
+-# define Tracec(c, x) do { if (verbose && (c)) fprintf x ; } while (0)
+-# define Tracecv(c, x) do { if (verbose > 1 && (c)) fprintf x ; } while (0)
+-#else
+-# define Assert(cond, msg)
+-# define Trace(x)
+-# define Tracev(x)
+-# define Tracevv(x)
+-# define Tracec(c, x)
+-# define Tracecv(c, x)
+-#endif
+-
+-static int fill_inbuf(void);
+-static void flush_window(void);
+ static void error(char *m);
+
+ /*
+@@ -189,11 +131,6 @@ static void error(char *m);
+ static struct boot_params *real_mode; /* Pointer to real-mode data */
+ static int quiet;
+
+-extern unsigned char input_data[];
+-extern int input_len;
+-
+-static long bytes_out;
+-
+ static void *memset(void *s, int c, unsigned n);
+ static void *memcpy(void *dest, const void *src, unsigned n);
+
+@@ -213,7 +150,19 @@ static char *vidmem;
+ static int vidport;
+ static int lines, cols;
+
++#define NEW_CODE
++
++#ifdef CONFIG_KERNEL_GZIP
+ #include "../../../../lib/inflate.c"
++#endif
++
++#ifdef CONFIG_KERNEL_BZIP2
++#include "../../../../lib/decompress_bunzip2.c"
++#endif
++
++#ifdef CONFIG_KERNEL_LZMA
++#include "../../../../lib/decompress_unlzma.c"
++#endif
+
+ static void scroll(void)
+ {
+@@ -291,38 +240,6 @@ static void *memcpy(void *dest, const vo
+ return dest;
+ }
+
+-/* ===========================================================================
+- * Fill the input buffer. This is called only when the buffer is empty
+- * and at least one byte is really needed.
+- */
+-static int fill_inbuf(void)
+-{
+- error("ran out of input data");
+- return 0;
+-}
+-
+-/* ===========================================================================
+- * Write the output window window[0..outcnt-1] and update crc and bytes_out.
+- * (Used for the decompressed data only.)
+- */
+-static void flush_window(void)
+-{
+- /* With my window equal to my output buffer
+- * I only need to compute the crc here.
+- */
+- unsigned long c = crc; /* temporary variable */
+- unsigned n;
+- unsigned char *in, ch;
+-
+- in = window;
+- for (n = 0; n < outcnt; n++) {
+- ch = *in++;
+- c = crc_32_tab[((int)c ^ ch) & 0xff] ^ (c >> 8);
+- }
+- crc = c;
+- bytes_out += (unsigned long)outcnt;
+- outcnt = 0;
+-}
+
+ static void error(char *x)
+ {
+@@ -405,12 +322,8 @@ asmlinkage void decompress_kernel(void *
+ lines = real_mode->screen_info.orig_video_lines;
+ cols = real_mode->screen_info.orig_video_cols;
+
+- window = output; /* Output buffer (Normally at 1M) */
+ free_mem_ptr = heap; /* Heap */
+ free_mem_end_ptr = heap + BOOT_HEAP_SIZE;
+- inbuf = input_data; /* Input buffer */
+- insize = input_len;
+- inptr = 0;
+
+ #ifdef CONFIG_X86_64
+ if ((unsigned long)output & (__KERNEL_ALIGN - 1))
+@@ -428,10 +341,9 @@ asmlinkage void decompress_kernel(void *
+ #endif
+ #endif
+
+- makecrc();
+ if (!quiet)
+ putstr("\nDecompressing Linux... ");
+- gunzip();
++ decompress(input_data, input_len, NULL, NULL, output, NULL, error);
+ parse_elf(output);
+ if (!quiet)
+ putstr("done.\nBooting the kernel.\n");
+diff -purN linux-2.6.27.6/drivers/block/Kconfig linux-2.6.27.6udpcast/drivers/block/Kconfig
+--- linux-2.6.27.6/drivers/block/Kconfig 2008-11-13 18:56:21.000000000 +0100
++++ linux-2.6.27.6udpcast/drivers/block/Kconfig 2008-11-16 23:02:55.000000000 +0100
+@@ -357,6 +357,30 @@ config BLK_DEV_XIP
+ will prevent RAM block device backing store memory from being
+ allocated from highmem (only a problem for highmem systems).
+
++config RD_BZIP2
++ bool "Initial ramdisk compressed using bzip2"
++ default n
++ depends on BLK_DEV_INITRD=y
++ help
++ Support loading of a bzip2 encoded initial ramdisk or cpio buffer
++ If unsure, say N.
++
++config RD_LZMA
++ bool "Initial ramdisk compressed using lzma"
++ default n
++ depends on BLK_DEV_INITRD=y
++ help
++ Support loading of a lzma encoded initial ramdisk or cpio buffer
++ If unsure, say N.
++
++config RD_GZIP
++ bool "Initial ramdisk compressed using gzip"
++ default y
++ depends on BLK_DEV_INITRD=y
++ help
++ Support loading of a gzip encoded initial ramdisk or cpio buffer.
++ If unsure, say Y.
++
+ config CDROM_PKTCDVD
+ tristate "Packet writing on CD/DVD media"
+ depends on !UML
+diff -purN linux-2.6.27.6/include/asm-x86/boot.h linux-2.6.27.6udpcast/include/asm-x86/boot.h
+--- linux-2.6.27.6/include/asm-x86/boot.h 2008-11-13 18:56:21.000000000 +0100
++++ linux-2.6.27.6udpcast/include/asm-x86/boot.h 2008-11-16 23:02:55.000000000 +0100
+@@ -17,11 +17,21 @@
+ + (CONFIG_PHYSICAL_ALIGN - 1)) \
+ & ~(CONFIG_PHYSICAL_ALIGN - 1))
+
++#if (defined CONFIG_KERNEL_BZIP2)
++#define BOOT_HEAP_SIZE 0x400000
++#else
++
+ #ifdef CONFIG_X86_64
+ #define BOOT_HEAP_SIZE 0x7000
+-#define BOOT_STACK_SIZE 0x4000
+ #else
+ #define BOOT_HEAP_SIZE 0x4000
++#endif
++
++#endif
++
++#ifdef CONFIG_X86_64
++#define BOOT_STACK_SIZE 0x4000
++#else
+ #define BOOT_STACK_SIZE 0x1000
+ #endif
+
+diff -purN linux-2.6.27.6/include/linux/decompress/bunzip2.h linux-2.6.27.6udpcast/include/linux/decompress/bunzip2.h
+--- linux-2.6.27.6/include/linux/decompress/bunzip2.h 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.27.6udpcast/include/linux/decompress/bunzip2.h 2008-11-16 23:34:15.000000000 +0100
+@@ -0,0 +1,10 @@
++#ifndef DECOMPRESS_BUNZIP2_H
++#define DECOMPRESS_BUNZIP2_H
++
++int bunzip2(unsigned char *inbuf, int len,
++ int(*fill)(void*, unsigned int),
++ int(*flush)(void*, unsigned int),
++ unsigned char *output,
++ int *pos,
++ void(*error)(char *x));
++#endif
+diff -purN linux-2.6.27.6/include/linux/decompress/generic.h linux-2.6.27.6udpcast/include/linux/decompress/generic.h
+--- linux-2.6.27.6/include/linux/decompress/generic.h 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.27.6udpcast/include/linux/decompress/generic.h 2008-11-16 23:34:15.000000000 +0100
+@@ -0,0 +1,30 @@
++#ifndef DECOMPRESS_GENERIC_H
++#define DECOMPRESS_GENERIC_H
++
++/* Minimal chunksize to be read.
++ *Bzip2 prefers at least 4096
++ *Lzma prefers 0x10000 */
++#define COMPR_IOBUF_SIZE 4096
++
++typedef int (*decompress_fn) (unsigned char *inbuf, int len,
++ int(*fill)(void*, unsigned int),
++ int(*writebb)(void*, unsigned int),
++ unsigned char *output,
++ int *posp,
++ void(*error)(char *x));
++
++/* inbuf - input buffer
++ *len - len of pre-read data in inbuf
++ *fill - function to fill inbuf if empty
++ *writebb - function to write out outbug
++ *posp - if non-null, input position (number of bytes read) will be
++ * returned here
++ *
++ *If len != 0, the inbuf is initialized (with as much data), and fill
++ *should not be called
++ *If len = 0, the inbuf is allocated, but empty. Its size is IOBUF_SIZE
++ *fill should be called (repeatedly...) to read data, at most IOBUF_SIZE
++ */
++
++
++#endif
+diff -purN linux-2.6.27.6/include/linux/decompress/inflate.h linux-2.6.27.6udpcast/include/linux/decompress/inflate.h
+--- linux-2.6.27.6/include/linux/decompress/inflate.h 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.27.6udpcast/include/linux/decompress/inflate.h 2008-11-16 23:34:15.000000000 +0100
+@@ -0,0 +1,13 @@
++#ifndef INFLATE_H
++#define INFLATE_H
++
++/* Other housekeeping constants */
++#define INBUFSIZ 4096
++
++int gunzip(unsigned char *inbuf, int len,
++ int(*fill)(void*, unsigned int),
++ int(*flush)(void*, unsigned int),
++ unsigned char *output,
++ int *pos,
++ void(*error_fn)(char *x));
++#endif
+diff -purN linux-2.6.27.6/include/linux/decompress/mm.h linux-2.6.27.6udpcast/include/linux/decompress/mm.h
+--- linux-2.6.27.6/include/linux/decompress/mm.h 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.27.6udpcast/include/linux/decompress/mm.h 2008-11-16 23:34:15.000000000 +0100
+@@ -0,0 +1,89 @@
++/*
++ * linux/compr_mm.h
++ *
++ * Memory management for pre-boot and ramdisk uncompressors
++ *
++ * Authors: Alain Knaff <alain@knaff.lu>
++ *
++ */
++
++#ifndef DECOMPR_MM_H
++#define DECOMPR_MM_H
++
++#ifdef STATIC
++
++/* Code active when included from pre-boot environment: */
++
++/* A trivial malloc implementation, adapted from
++ * malloc by Hannu Savolainen 1993 and Matthias Urlichs 1994
++ */
++static unsigned long malloc_ptr;
++static int malloc_count;
++
++static void *malloc(int size)
++{
++ void *p;
++
++ if (size < 0)
++ error("Malloc error");
++ if (!malloc_ptr)
++ malloc_ptr = free_mem_ptr;
++
++ malloc_ptr = (malloc_ptr + 3) & ~3; /* Align */
++
++ p = (void *)malloc_ptr;
++ malloc_ptr += size;
++
++ if (free_mem_end_ptr && malloc_ptr >= free_mem_end_ptr)
++ error("Out of memory");
++
++ malloc_count++;
++ return p;
++}
++
++static void free(void *where)
++{
++ malloc_count--;
++ if (!malloc_count)
++ malloc_ptr = free_mem_ptr;
++}
++
++#define large_malloc(a) malloc(a)
++#define large_free(a) free(a)
++
++#define set_error_fn(x)
++#define panic error
++
++#define INIT
++
++#else /* STATIC */
++
++/* Code active when compiled standalone for use when loading ramdisk: */
++
++#include <linux/kernel.h>
++#include <linux/fs.h>
++#include <linux/string.h>
++#include <linux/vmalloc.h>
++
++/* Use defines rather than static inline in order to avoid spurious
++ * warnings when not needed (indeed large_malloc / large_free are not
++ * needed by inflate */
++
++#define malloc(a) kmalloc(a, GFP_KERNEL)
++#define free(a) kfree(a)
++
++#define large_malloc(a) vmalloc(a)
++#define large_free(a) vfree(a)
++
++static void(*error)(char *m);
++#define set_error_fn(x) error = x;
++#define NEW_CODE
++
++#define INIT __init
++#define STATIC
++
++#include <linux/init.h>
++
++#endif /* STATIC */
++
++#endif /* DECOMPR_MM_H */
+diff -purN linux-2.6.27.6/include/linux/decompress/unlzma.h linux-2.6.27.6udpcast/include/linux/decompress/unlzma.h
+--- linux-2.6.27.6/include/linux/decompress/unlzma.h 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.27.6udpcast/include/linux/decompress/unlzma.h 2008-11-16 23:34:15.000000000 +0100
+@@ -0,0 +1,12 @@
++#ifndef DECOMPRESS_UNLZMA_H
++#define DECOMPRESS_UNLZMA_H
++
++int unlzma(unsigned char *, int,
++ int(*fill)(void*, unsigned int),
++ int(*flush)(void*, unsigned int),
++ unsigned char *output,
++ int *posp,
++ void(*error)(char *x)
++ );
++
++#endif
+diff -purN linux-2.6.27.6/init/do_mounts_rd.c linux-2.6.27.6udpcast/init/do_mounts_rd.c
+--- linux-2.6.27.6/init/do_mounts_rd.c 2008-11-13 18:56:21.000000000 +0100
++++ linux-2.6.27.6udpcast/init/do_mounts_rd.c 2008-11-16 23:02:55.000000000 +0100
+@@ -10,6 +10,12 @@
+
+ #include "do_mounts.h"
+
++#include <linux/decompress/generic.h>
++
++#include <linux/decompress/bunzip2.h>
++#include <linux/decompress/unlzma.h>
++#include <linux/decompress/inflate.h>
++
+ int __initdata rd_prompt = 1;/* 1 = prompt for RAM disk, 0 = don't prompt */
+
+ static int __init prompt_ramdisk(char *str)
+@@ -28,7 +34,7 @@ static int __init ramdisk_start_setup(ch
+ }
+ __setup("ramdisk_start=", ramdisk_start_setup);
+
+-static int __init crd_load(int in_fd, int out_fd);
++static int __init crd_load(int in_fd, int out_fd, decompress_fn deco);
+
+ /*
+ * This routine tries to find a RAM disk image to load, and returns the
+@@ -44,7 +50,7 @@ static int __init crd_load(int in_fd, in
+ * gzip
+ */
+ static int __init
+-identify_ramdisk_image(int fd, int start_block)
++identify_ramdisk_image(int fd, int start_block, decompress_fn *decompressor)
+ {
+ const int size = 512;
+ struct minix_super_block *minixsb;
+@@ -70,6 +76,7 @@ identify_ramdisk_image(int fd, int start
+ sys_lseek(fd, start_block * BLOCK_SIZE, 0);
+ sys_read(fd, buf, size);
+
++#ifdef CONFIG_RD_GZIP
+ /*
+ * If it matches the gzip magic numbers, return -1
+ */
+@@ -77,9 +84,39 @@ identify_ramdisk_image(int fd, int start
+ printk(KERN_NOTICE
+ "RAMDISK: Compressed image found at block %d\n",
+ start_block);
++ *decompressor = gunzip;
++ nblocks = 0;
++ goto done;
++ }
++#endif
++
++#ifdef CONFIG_RD_BZIP2
++ /*
++ * If it matches the bzip2 magic numbers, return -1
++ */
++ if (buf[0] == 0x42 && (buf[1] == 0x5a)) {
++ printk(KERN_NOTICE
++ "RAMDISK: Bzipped image found at block %d\n",
++ start_block);
++ *decompressor = bunzip2;
+ nblocks = 0;
+ goto done;
+ }
++#endif
++
++#ifdef CONFIG_RD_LZMA
++ /*
++ * If it matches the lzma magic numbers, return -1
++ */
++ if (buf[0] == 0x5d && (buf[1] == 0x00)) {
++ printk(KERN_NOTICE
++ "RAMDISK: Lzma image found at block %d\n",
++ start_block);
++ *decompressor = unlzma;
++ nblocks = 0;
++ goto done;
++ }
++#endif
+
+ /* romfs is at block zero too */
+ if (romfsb->word0 == ROMSB_WORD0 &&
+@@ -143,6 +180,7 @@ int __init rd_load_image(char *from)
+ int nblocks, i, disk;
+ char *buf = NULL;
+ unsigned short rotate = 0;
++ decompress_fn decompressor = NULL;
+ #if !defined(CONFIG_S390) && !defined(CONFIG_PPC_ISERIES)
+ char rotator[4] = { '|' , '/' , '-' , '\\' };
+ #endif
+@@ -155,12 +193,12 @@ int __init rd_load_image(char *from)
+ if (in_fd < 0)
+ goto noclose_input;
+
+- nblocks = identify_ramdisk_image(in_fd, rd_image_start);
++ nblocks = identify_ramdisk_image(in_fd, rd_image_start, &decompressor);
+ if (nblocks < 0)
+ goto done;
+
+ if (nblocks == 0) {
+- if (crd_load(in_fd, out_fd) == 0)
++ if (crd_load(in_fd, out_fd, decompressor) == 0)
+ goto successful_load;
+ goto done;
+ }
+@@ -259,138 +297,48 @@ int __init rd_load_disk(int n)
+ return rd_load_image("/dev/root");
+ }
+
+-/*
+- * gzip declarations
+- */
+-
+-#define OF(args) args
+-
+-#ifndef memzero
+-#define memzero(s, n) memset ((s), 0, (n))
+-#endif
+-
+-typedef unsigned char uch;
+-typedef unsigned short ush;
+-typedef unsigned long ulg;
+-
+-#define INBUFSIZ 4096
+-#define WSIZE 0x8000 /* window size--must be a power of two, and */
+- /* at least 32K for zip's deflate method */
+-
+-static uch *inbuf;
+-static uch *window;
+-
+-static unsigned insize; /* valid bytes in inbuf */
+-static unsigned inptr; /* index of next byte to be processed in inbuf */
+-static unsigned outcnt; /* bytes in output buffer */
+ static int exit_code;
+-static int unzip_error;
+-static long bytes_out;
++static int decompress_error;
+ static int crd_infd, crd_outfd;
+
+-#define get_byte() (inptr < insize ? inbuf[inptr++] : fill_inbuf())
+-
+-/* Diagnostic functions (stubbed out) */
+-#define Assert(cond,msg)
+-#define Trace(x)
+-#define Tracev(x)
+-#define Tracevv(x)
+-#define Tracec(c,x)
+-#define Tracecv(c,x)
+-
+-#define STATIC static
+-#define INIT __init
+-
+-static int __init fill_inbuf(void);
+-static void __init flush_window(void);
+-static void __init error(char *m);
+-
+-#define NO_INFLATE_MALLOC
+-
+-#include "../lib/inflate.c"
+-
+-/* ===========================================================================
+- * Fill the input buffer. This is called only when the buffer is empty
+- * and at least one byte is really needed.
+- * Returning -1 does not guarantee that gunzip() will ever return.
+- */
+-static int __init fill_inbuf(void)
++static int __init compr_fill(void *buf, unsigned int len)
+ {
+- if (exit_code) return -1;
+-
+- insize = sys_read(crd_infd, inbuf, INBUFSIZ);
+- if (insize == 0) {
+- error("RAMDISK: ran out of compressed data");
+- return -1;
+- }
+-
+- inptr = 1;
+-
+- return inbuf[0];
++ int r = sys_read(crd_infd, buf, len);
++ if (r < 0)
++ printk(KERN_ERR "RAMDISK: error while reading compressed data");
++ else if (r == 0)
++ printk(KERN_ERR "RAMDISK: EOF while reading compressed data");
++ return r;
+ }
+
+-/* ===========================================================================
+- * Write the output window window[0..outcnt-1] and update crc and bytes_out.
+- * (Used for the decompressed data only.)
+- */
+-static void __init flush_window(void)
++static int __init compr_flush(void *window, unsigned int outcnt)
+ {
+- ulg c = crc; /* temporary variable */
+- unsigned n, written;
+- uch *in, ch;
+-
+- written = sys_write(crd_outfd, window, outcnt);
+- if (written != outcnt && unzip_error == 0) {
+- printk(KERN_ERR "RAMDISK: incomplete write (%d != %d) %ld\n",
+- written, outcnt, bytes_out);
+- unzip_error = 1;
+- }
+- in = window;
+- for (n = 0; n < outcnt; n++) {
+- ch = *in++;
+- c = crc_32_tab[((int)c ^ ch) & 0xff] ^ (c >> 8);
+- }
+- crc = c;
+- bytes_out += (ulg)outcnt;
+- outcnt = 0;
++ int written = sys_write(crd_outfd, window, outcnt);
++ if (written != outcnt) {
++ if (decompress_error == 0)
++ printk(KERN_ERR
++ "RAMDISK: incomplete write (%d != %d)\n",
++ written, outcnt);
++ decompress_error = 1;
++ return -1;
++ }
++ return outcnt;
+ }
+
+ static void __init error(char *x)
+ {
+ printk(KERN_ERR "%s\n", x);
+ exit_code = 1;
+- unzip_error = 1;
++ decompress_error = 1;
+ }
+
+-static int __init crd_load(int in_fd, int out_fd)
++static int __init crd_load(int in_fd, int out_fd, decompress_fn deco)
+ {
+ int result;
+-
+- insize = 0; /* valid bytes in inbuf */
+- inptr = 0; /* index of next byte to be processed in inbuf */
+- outcnt = 0; /* bytes in output buffer */
+- exit_code = 0;
+- bytes_out = 0;
+- crc = (ulg)0xffffffffL; /* shift register contents */
+-
+ crd_infd = in_fd;
+ crd_outfd = out_fd;
+- inbuf = kmalloc(INBUFSIZ, GFP_KERNEL);
+- if (!inbuf) {
+- printk(KERN_ERR "RAMDISK: Couldn't allocate gzip buffer\n");
+- return -1;
+- }
+- window = kmalloc(WSIZE, GFP_KERNEL);
+- if (!window) {
+- printk(KERN_ERR "RAMDISK: Couldn't allocate gzip window\n");
+- kfree(inbuf);
+- return -1;
+- }
+- makecrc();
+- result = gunzip();
+- if (unzip_error)
++ result = deco(NULL, 0, compr_fill, compr_flush, NULL, NULL, error);
++ if (decompress_error)
+ result = 1;
+- kfree(inbuf);
+- kfree(window);
+ return result;
+ }
+diff -purN linux-2.6.27.6/init/initramfs.c linux-2.6.27.6udpcast/init/initramfs.c
+--- linux-2.6.27.6/init/initramfs.c 2008-11-13 18:56:21.000000000 +0100
++++ linux-2.6.27.6udpcast/init/initramfs.c 2008-11-16 23:02:55.000000000 +0100
+@@ -337,11 +337,14 @@ static int __init write_buffer(char *buf
+ return len - count;
+ }
+
+-static void __init flush_buffer(char *buf, unsigned len)
++
++static int __init flush_buffer(void *bufv, unsigned len)
+ {
++ char *buf = (char *) bufv;
+ int written;
++ int origLen = len;
+ if (message)
+- return;
++ return -1;
+ while ((written = write_buffer(buf, len)) < len && !message) {
+ char c = buf[written];
+ if (c == '0') {
+@@ -355,73 +358,14 @@ static void __init flush_buffer(char *bu
+ } else
+ error("junk in compressed archive");
+ }
++ return origLen;
+ }
+
+-/*
+- * gzip declarations
+- */
+-
+-#define OF(args) args
+-
+-#ifndef memzero
+-#define memzero(s, n) memset ((s), 0, (n))
+-#endif
++static unsigned my_inptr; /* index of next byte to be processed in inbuf */
+
+-typedef unsigned char uch;
+-typedef unsigned short ush;
+-typedef unsigned long ulg;
+-
+-#define WSIZE 0x8000 /* window size--must be a power of two, and */
+- /* at least 32K for zip's deflate method */
+-
+-static uch *inbuf;
+-static uch *window;
+-
+-static unsigned insize; /* valid bytes in inbuf */
+-static unsigned inptr; /* index of next byte to be processed in inbuf */
+-static unsigned outcnt; /* bytes in output buffer */
+-static long bytes_out;
+-
+-#define get_byte() (inptr < insize ? inbuf[inptr++] : -1)
+-
+-/* Diagnostic functions (stubbed out) */
+-#define Assert(cond,msg)
+-#define Trace(x)
+-#define Tracev(x)
+-#define Tracevv(x)
+-#define Tracec(c,x)
+-#define Tracecv(c,x)
+-
+-#define STATIC static
+-#define INIT __init
+-
+-static void __init flush_window(void);
+-static void __init error(char *m);
+-
+-#define NO_INFLATE_MALLOC
+-
+-#include "../lib/inflate.c"
+-
+-/* ===========================================================================
+- * Write the output window window[0..outcnt-1] and update crc and bytes_out.
+- * (Used for the decompressed data only.)
+- */
+-static void __init flush_window(void)
+-{
+- ulg c = crc; /* temporary variable */
+- unsigned n;
+- uch *in, ch;
+-
+- flush_buffer(window, outcnt);
+- in = window;
+- for (n = 0; n < outcnt; n++) {
+- ch = *in++;
+- c = crc_32_tab[((int)c ^ ch) & 0xff] ^ (c >> 8);
+- }
+- crc = c;
+- bytes_out += (ulg)outcnt;
+- outcnt = 0;
+-}
++#include <linux/decompress/bunzip2.h>
++#include <linux/decompress/unlzma.h>
++#include <linux/decompress/inflate.h>
+
+ static char * __init unpack_to_rootfs(char *buf, unsigned len, int check_only)
+ {
+@@ -430,9 +374,10 @@ static char * __init unpack_to_rootfs(ch
+ header_buf = kmalloc(110, GFP_KERNEL);
+ symlink_buf = kmalloc(PATH_MAX + N_ALIGN(PATH_MAX) + 1, GFP_KERNEL);
+ name_buf = kmalloc(N_ALIGN(PATH_MAX), GFP_KERNEL);
+- window = kmalloc(WSIZE, GFP_KERNEL);
+- if (!window || !header_buf || !symlink_buf || !name_buf)
++
++ if (!header_buf || !symlink_buf || !name_buf)
+ panic("can't allocate buffers");
++
+ state = Start;
+ this_header = 0;
+ message = NULL;
+@@ -452,21 +397,39 @@ static char * __init unpack_to_rootfs(ch
+ continue;
+ }
+ this_header = 0;
+- insize = len;
+- inbuf = buf;
+- inptr = 0;
+- outcnt = 0; /* bytes in output buffer */
+- bytes_out = 0;
+- crc = (ulg)0xffffffffL; /* shift register contents */
+- makecrc();
+- gunzip();
++ if (!gunzip(buf, len, NULL, flush_buffer, NULL,
++ &my_inptr, error) &&
++ message == NULL)
++ goto ok;
++
++#ifdef CONFIG_RD_BZIP2
++ message = NULL; /* Zero out message, or else cpio will
++ think an error has already occured */
++ if (!bunzip2(buf, len, NULL, flush_buffer, NULL,
++ &my_inptr, error) < 0
++ &&
++ message == NULL) {
++ goto ok;
++ }
++#endif
++
++#ifdef CONFIG_RD_LZMA
++ message = NULL; /* Zero out message, or else cpio will
++ think an error has already occured */
++ if (!unlzma(buf, len, NULL, flush_buffer, NULL,
++ &my_inptr, error) < 0
++ &&
++ message == NULL) {
++ goto ok;
++ }
++#endif
++ok:
+ if (state != Reset)
+- error("junk in gzipped archive");
+- this_header = saved_offset + inptr;
+- buf += inptr;
+- len -= inptr;
++ error("junk in compressed archive");
++ this_header = saved_offset + my_inptr;
++ buf += my_inptr;
++ len -= my_inptr;
+ }
+- kfree(window);
+ kfree(name_buf);
+ kfree(symlink_buf);
+ kfree(header_buf);
+diff -purN linux-2.6.27.6/init/Kconfig linux-2.6.27.6udpcast/init/Kconfig
+--- linux-2.6.27.6/init/Kconfig 2008-11-13 18:56:21.000000000 +0100
++++ linux-2.6.27.6udpcast/init/Kconfig 2008-11-16 23:02:55.000000000 +0100
+@@ -101,6 +101,56 @@ config LOCALVERSION_AUTO
+
+ which is done within the script "scripts/setlocalversion".)
+
++choice
++ prompt "Kernel compression mode"
++ default KERNEL_GZIP
++ help
++ The linux kernel is a kind of self-extracting executable.
++ Several compression algorithms are available, which differ
++ in efficiency, compression and decompression speed.
++ Compression speed is only relevant when building a kernel.
++ Decompression speed is relevant at each boot.
++
++ If you have any problems with bzip2 or lzma compressed
++ kernels, mail me (Alain Knaff) <alain@knaff.lu>. (An older
++ version of this functionality (bzip2 only), for 2.4, was
++ supplied by Christian Ludwig)
++
++ High compression options are mostly useful for users, who
++ are low on disk space (embedded systems), but for whom ram
++ size matters less.
++
++ If in doubt, select 'gzip'
++
++config KERNEL_GZIP
++ bool "Gzip"
++ help
++ The old and tried gzip compression. Its compression ratio is
++ the poorest among the 3 choices; however its speed (both
++ compression and decompression) is the fastest.
++
++config KERNEL_BZIP2
++ bool "Bzip2"
++ help
++ Its compression ratio and speed is intermediate.
++ Decompression speed is slowest among the 3.
++ The kernel size is about 10 per cent smaller with bzip2,
++ in comparison to gzip.
++ Bzip2 uses a large amount of memory. For modern kernels
++ you will need at least 8MB RAM or more for booting.
++
++config KERNEL_LZMA
++ bool "LZMA"
++ help
++ The most recent compression algorithm.
++ Its ratio is best, decompression speed is between the other
++ 2. Compression is slowest.
++ The kernel size is about 33 per cent smaller with lzma,
++ in comparison to gzip.
++
++endchoice
++
++
+ config SWAP
+ bool "Support for paging of anonymous memory (swap)"
+ depends on MMU && BLOCK
+diff -purN linux-2.6.27.6/lib/decompress_bunzip2.c linux-2.6.27.6udpcast/lib/decompress_bunzip2.c
+--- linux-2.6.27.6/lib/decompress_bunzip2.c 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.27.6udpcast/lib/decompress_bunzip2.c 2008-11-16 23:40:21.000000000 +0100
+@@ -0,0 +1,735 @@
++/* vi: set sw = 4 ts = 4: */
++/* Small bzip2 deflate implementation, by Rob Landley (rob@landley.net).
++
++ Based on bzip2 decompression code by Julian R Seward (jseward@acm.org),
++ which also acknowledges contributions by Mike Burrows, David Wheeler,
++ Peter Fenwick, Alistair Moffat, Radford Neal, Ian H. Witten,
++ Robert Sedgewick, and Jon L. Bentley.
++
++ This code is licensed under the LGPLv2:
++ LGPL (http://www.gnu.org/copyleft/lgpl.html
++*/
++
++/*
++ Size and speed optimizations by Manuel Novoa III (mjn3@codepoet.org).
++
++ More efficient reading of Huffman codes, a streamlined read_bunzip()
++ function, and various other tweaks. In (limited) tests, approximately
++ 20% faster than bzcat on x86 and about 10% faster on arm.
++
++ Note that about 2/3 of the time is spent in read_unzip() reversing
++ the Burrows-Wheeler transformation. Much of that time is delay
++ resulting from cache misses.
++
++ I would ask that anyone benefiting from this work, especially those
++ using it in commercial products, consider making a donation to my local
++ non-profit hospice organization in the name of the woman I loved, who
++ passed away Feb. 12, 2003.
++
++ In memory of Toni W. Hagan
++
++ Hospice of Acadiana, Inc.
++ 2600 Johnston St., Suite 200
++ Lafayette, LA 70503-3240
++
++ Phone (337) 232-1234 or 1-800-738-2226
++ Fax (337) 232-1297
++
++ http://www.hospiceacadiana.com/
++
++ Manuel
++ */
++
++/*
++ Made it fit for running in Linux Kernel by Alain Knaff (alain@knaff.lu)
++*/
++
++
++#ifndef STATIC
++#include <linux/decompress/bunzip2.h>
++#endif /* !STATIC */
++
++#include <linux/decompress/mm.h>
++
++#ifndef INT_MAX
++#define INT_MAX 0x7fffffff
++#endif
++
++/* Constants for Huffman coding */
++#define MAX_GROUPS 6
++#define GROUP_SIZE 50 /* 64 would have been more efficient */
++#define MAX_HUFCODE_BITS 20 /* Longest Huffman code allowed */
++#define MAX_SYMBOLS 258 /* 256 literals + RUNA + RUNB */
++#define SYMBOL_RUNA 0
++#define SYMBOL_RUNB 1
++
++/* Status return values */
++#define RETVAL_OK 0
++#define RETVAL_LAST_BLOCK (-1)
++#define RETVAL_NOT_BZIP_DATA (-2)
++#define RETVAL_UNEXPECTED_INPUT_EOF (-3)
++#define RETVAL_UNEXPECTED_OUTPUT_EOF (-4)
++#define RETVAL_DATA_ERROR (-5)
++#define RETVAL_OUT_OF_MEMORY (-6)
++#define RETVAL_OBSOLETE_INPUT (-7)
++
++/* Other housekeeping constants */
++#define BZIP2_IOBUF_SIZE 4096
++
++/* This is what we know about each Huffman coding group */
++struct group_data {
++ /* We have an extra slot at the end of limit[] for a sentinal value. */
++ int limit[MAX_HUFCODE_BITS+1];
++ int base[MAX_HUFCODE_BITS];
++ int permute[MAX_SYMBOLS];
++ int minLen, maxLen;
++};
++
++/* Structure holding all the housekeeping data, including IO buffers and
++ memory that persists between calls to bunzip */
++struct bunzip_data {
++ /* State for interrupting output loop */
++ int writeCopies, writePos, writeRunCountdown, writeCount, writeCurrent;
++ /* I/O tracking data (file handles, buffers, positions, etc.) */
++ int (*fill)(void*, unsigned int);
++ int inbufCount, inbufPos /*, outbufPos*/;
++ unsigned char *inbuf /*,*outbuf*/;
++ unsigned int inbufBitCount, inbufBits;
++ /* The CRC values stored in the block header and calculated from the
++ data */
++ unsigned int crc32Table[256], headerCRC, totalCRC, writeCRC;
++ /* Intermediate buffer and its size (in bytes) */
++ unsigned int *dbuf, dbufSize;
++ /* These things are a bit too big to go on the stack */
++ unsigned char selectors[32768]; /* nSelectors = 15 bits */
++ struct group_data groups[MAX_GROUPS]; /* Huffman coding tables */
++ int io_error; /* non-zero if we have IO error */
++};
++
++
++/* Return the next nnn bits of input. All reads from the compressed input
++ are done through this function. All reads are big endian */
++static unsigned int INIT get_bits(struct bunzip_data *bd, char bits_wanted)
++{
++ unsigned int bits = 0;
++
++ /* If we need to get more data from the byte buffer, do so.
++ (Loop getting one byte at a time to enforce endianness and avoid
++ unaligned access.) */
++ while (bd->inbufBitCount < bits_wanted) {
++ /* If we need to read more data from file into byte buffer, do
++ so */
++ if (bd->inbufPos == bd->inbufCount) {
++ if (bd->io_error)
++ return 0;
++ bd->inbufCount = bd->fill(bd->inbuf, BZIP2_IOBUF_SIZE);
++ if (bd->inbufCount <= 0) {
++ bd->io_error = RETVAL_UNEXPECTED_INPUT_EOF;
++ return 0;
++ }
++ bd->inbufPos = 0;
++ }
++ /* Avoid 32-bit overflow (dump bit buffer to top of output) */
++ if (bd->inbufBitCount >= 24) {
++ bits = bd->inbufBits&((1 << bd->inbufBitCount)-1);
++ bits_wanted -= bd->inbufBitCount;
++ bits <<= bits_wanted;
++ bd->inbufBitCount = 0;
++ }
++ /* Grab next 8 bits of input from buffer. */
++ bd->inbufBits = (bd->inbufBits << 8)|bd->inbuf[bd->inbufPos++];
++ bd->inbufBitCount += 8;
++ }
++ /* Calculate result */
++ bd->inbufBitCount -= bits_wanted;
++ bits |= (bd->inbufBits >> bd->inbufBitCount)&((1 << bits_wanted)-1);
++
++ return bits;
++}
++
++/* Unpacks the next block and sets up for the inverse burrows-wheeler step. */
++
++static int INIT get_next_block(struct bunzip_data *bd)
++{
++ struct group_data *hufGroup = NULL;
++ int *base = NULL;
++ int *limit = NULL;
++ int dbufCount, nextSym, dbufSize, groupCount, selector,
++ i, j, k, t, runPos, symCount, symTotal, nSelectors,
++ byteCount[256];
++ unsigned char uc, symToByte[256], mtfSymbol[256], *selectors;
++ unsigned int *dbuf, origPtr;
++
++ dbuf = bd->dbuf;
++ dbufSize = bd->dbufSize;
++ selectors = bd->selectors;
++
++ /* Read in header signature and CRC, then validate signature.
++ (last block signature means CRC is for whole file, return now) */
++ i = get_bits(bd, 24);
++ j = get_bits(bd, 24);
++ bd->headerCRC = get_bits(bd, 32);
++ if ((i == 0x177245) && (j == 0x385090))
++ return RETVAL_LAST_BLOCK;
++ if ((i != 0x314159) || (j != 0x265359))
++ return RETVAL_NOT_BZIP_DATA;
++ /* We can add support for blockRandomised if anybody complains.
++ There was some code for this in busybox 1.0.0-pre3, but nobody ever
++ noticed that it didn't actually work. */
++ if (get_bits(bd, 1))
++ return RETVAL_OBSOLETE_INPUT;
++ origPtr = get_bits(bd, 24);
++ if (origPtr > dbufSize)
++ return RETVAL_DATA_ERROR;
++ /* mapping table: if some byte values are never used (encoding things
++ like ascii text), the compression code removes the gaps to have fewer
++ symbols to deal with, and writes a sparse bitfield indicating which
++ values were present. We make a translation table to convert the
++ symbols back to the corresponding bytes. */
++ t = get_bits(bd, 16);
++ symTotal = 0;
++ for (i = 0; i < 16; i++) {
++ if (t&(1 << (15-i))) {
++ k = get_bits(bd, 16);
++ for (j = 0; j < 16; j++)
++ if (k&(1 << (15-j)))
++ symToByte[symTotal++] = (16*i)+j;
++ }
++ }
++ /* How many different Huffman coding groups does this block use? */
++ groupCount = get_bits(bd, 3);
++ if (groupCount < 2 || groupCount > MAX_GROUPS)
++ return RETVAL_DATA_ERROR;
++ /* nSelectors: Every GROUP_SIZE many symbols we select a new
++ Huffman coding group. Read in the group selector list,
++ which is stored as MTF encoded bit runs. (MTF = Move To
++ Front, as each value is used it's moved to the start of the
++ list.) */
++ nSelectors = get_bits(bd, 15);
++ if (!nSelectors)
++ return RETVAL_DATA_ERROR;
++ for (i = 0; i < groupCount; i++)
++ mtfSymbol[i] = i;
++ for (i = 0; i < nSelectors; i++) {
++ /* Get next value */
++ for (j = 0; get_bits(bd, 1); j++)
++ if (j >= groupCount)
++ return RETVAL_DATA_ERROR;
++ /* Decode MTF to get the next selector */
++ uc = mtfSymbol[j];
++ for (; j; j--)
++ mtfSymbol[j] = mtfSymbol[j-1];
++ mtfSymbol[0] = selectors[i] = uc;
++ }
++ /* Read the Huffman coding tables for each group, which code
++ for symTotal literal symbols, plus two run symbols (RUNA,
++ RUNB) */
++ symCount = symTotal+2;
++ for (j = 0; j < groupCount; j++) {
++ unsigned char length[MAX_SYMBOLS], temp[MAX_HUFCODE_BITS+1];
++ int minLen, maxLen, pp;
++ /* Read Huffman code lengths for each symbol. They're
++ stored in a way similar to mtf; record a starting
++ value for the first symbol, and an offset from the
++ previous value for everys symbol after that.
++ (Subtracting 1 before the loop and then adding it
++ back at the end is an optimization that makes the
++ test inside the loop simpler: symbol length 0
++ becomes negative, so an unsigned inequality catches
++ it.) */
++ t = get_bits(bd, 5)-1;
++ for (i = 0; i < symCount; i++) {
++ for (;;) {
++ if (((unsigned)t) > (MAX_HUFCODE_BITS-1))
++ return RETVAL_DATA_ERROR;
++
++ /* If first bit is 0, stop. Else
++ second bit indicates whether to
++ increment or decrement the value.
++ Optimization: grab 2 bits and unget
++ the second if the first was 0. */
++
++ k = get_bits(bd, 2);
++ if (k < 2) {
++ bd->inbufBitCount++;
++ break;
++ }
++ /* Add one if second bit 1, else
++ * subtract 1. Avoids if/else */
++ t += (((k+1)&2)-1);
++ }
++ /* Correct for the initial -1, to get the
++ * final symbol length */
++ length[i] = t+1;
++ }
++ /* Find largest and smallest lengths in this group */
++ minLen = maxLen = length[0];
++
++ for (i = 1; i < symCount; i++) {
++ if (length[i] > maxLen)
++ maxLen = length[i];
++ else if (length[i] < minLen)
++ minLen = length[i];
++ }
++
++ /* Calculate permute[], base[], and limit[] tables from
++ * length[].
++ *
++ * permute[] is the lookup table for converting
++ * Huffman coded symbols into decoded symbols. base[]
++ * is the amount to subtract from the value of a
++ * Huffman symbol of a given length when using
++ * permute[].
++ *
++ * limit[] indicates the largest numerical value a
++ * symbol with a given number of bits can have. This
++ * is how the Huffman codes can vary in length: each
++ * code with a value > limit[length] needs another
++ * bit.
++ */
++ hufGroup = bd->groups+j;
++ hufGroup->minLen = minLen;
++ hufGroup->maxLen = maxLen;
++ /* Note that minLen can't be smaller than 1, so we
++ adjust the base and limit array pointers so we're
++ not always wasting the first entry. We do this
++ again when using them (during symbol decoding).*/
++ base = hufGroup->base-1;
++ limit = hufGroup->limit-1;
++ /* Calculate permute[]. Concurently, initialize
++ * temp[] and limit[]. */
++ pp = 0;
++ for (i = minLen; i <= maxLen; i++) {
++ temp[i] = limit[i] = 0;
++ for (t = 0; t < symCount; t++)
++ if (length[t] == i)
++ hufGroup->permute[pp++] = t;
++ }
++ /* Count symbols coded for at each bit length */
++ for (i = 0; i < symCount; i++)
++ temp[length[i]]++;
++ /* Calculate limit[] (the largest symbol-coding value
++ *at each bit length, which is (previous limit <<
++ *1)+symbols at this level), and base[] (number of
++ *symbols to ignore at each bit length, which is limit
++ *minus the cumulative count of symbols coded for
++ *already). */
++ pp = t = 0;
++ for (i = minLen; i < maxLen; i++) {
++ pp += temp[i];
++ /* We read the largest possible symbol size
++ and then unget bits after determining how
++ many we need, and those extra bits could be
++ set to anything. (They're noise from
++ future symbols.) At each level we're
++ really only interested in the first few
++ bits, so here we set all the trailing
++ to-be-ignored bits to 1 so they don't
++ affect the value > limit[length]
++ comparison. */
++ limit[i] = (pp << (maxLen - i)) - 1;
++ pp <<= 1;
++ base[i+1] = pp-(t += temp[i]);
++ }
++ limit[maxLen+1] = INT_MAX; /* Sentinal value for
++ * reading next sym. */
++ limit[maxLen] = pp+temp[maxLen]-1;
++ base[minLen] = 0;
++ }
++ /* We've finished reading and digesting the block header. Now
++ read this block's Huffman coded symbols from the file and
++ undo the Huffman coding and run length encoding, saving the
++ result into dbuf[dbufCount++] = uc */
++
++ /* Initialize symbol occurrence counters and symbol Move To
++ * Front table */
++ for (i = 0; i < 256; i++) {
++ byteCount[i] = 0;
++ mtfSymbol[i] = (unsigned char)i;
++ }
++ /* Loop through compressed symbols. */
++ runPos = dbufCount = symCount = selector = 0;
++ for (;;) {
++ /* Determine which Huffman coding group to use. */
++ if (!(symCount--)) {
++ symCount = GROUP_SIZE-1;
++ if (selector >= nSelectors)
++ return RETVAL_DATA_ERROR;
++ hufGroup = bd->groups+selectors[selector++];
++ base = hufGroup->base-1;
++ limit = hufGroup->limit-1;
++ }
++ /* Read next Huffman-coded symbol. */
++ /* Note: It is far cheaper to read maxLen bits and
++ back up than it is to read minLen bits and then an
++ additional bit at a time, testing as we go.
++ Because there is a trailing last block (with file
++ CRC), there is no danger of the overread causing an
++ unexpected EOF for a valid compressed file. As a
++ further optimization, we do the read inline
++ (falling back to a call to get_bits if the buffer
++ runs dry). The following (up to got_huff_bits:) is
++ equivalent to j = get_bits(bd, hufGroup->maxLen);
++ */
++ while (bd->inbufBitCount < hufGroup->maxLen) {
++ if (bd->inbufPos == bd->inbufCount) {
++ j = get_bits(bd, hufGroup->maxLen);
++ goto got_huff_bits;
++ }
++ bd->inbufBits =
++ (bd->inbufBits << 8)|bd->inbuf[bd->inbufPos++];
++ bd->inbufBitCount += 8;
++ };
++ bd->inbufBitCount -= hufGroup->maxLen;
++ j = (bd->inbufBits >> bd->inbufBitCount)&
++ ((1 << hufGroup->maxLen)-1);
++got_huff_bits:
++ /* Figure how how many bits are in next symbol and
++ * unget extras */
++ i = hufGroup->minLen;
++ while (j > limit[i])
++ ++i;
++ bd->inbufBitCount += (hufGroup->maxLen - i);
++ /* Huffman decode value to get nextSym (with bounds checking) */
++ if ((i > hufGroup->maxLen)
++ || (((unsigned)(j = (j>>(hufGroup->maxLen-i))-base[i]))
++ >= MAX_SYMBOLS))
++ return RETVAL_DATA_ERROR;
++ nextSym = hufGroup->permute[j];
++ /* We have now decoded the symbol, which indicates
++ either a new literal byte, or a repeated run of the
++ most recent literal byte. First, check if nextSym
++ indicates a repeated run, and if so loop collecting
++ how many times to repeat the last literal. */
++ if (((unsigned)nextSym) <= SYMBOL_RUNB) { /* RUNA or RUNB */
++ /* If this is the start of a new run, zero out
++ * counter */
++ if (!runPos) {
++ runPos = 1;
++ t = 0;
++ }
++ /* Neat trick that saves 1 symbol: instead of
++ or-ing 0 or 1 at each bit position, add 1
++ or 2 instead. For example, 1011 is 1 << 0
++ + 1 << 1 + 2 << 2. 1010 is 2 << 0 + 2 << 1
++ + 1 << 2. You can make any bit pattern
++ that way using 1 less symbol than the basic
++ or 0/1 method (except all bits 0, which
++ would use no symbols, but a run of length 0
++ doesn't mean anything in this context).
++ Thus space is saved. */
++ t += (runPos << nextSym);
++ /* +runPos if RUNA; +2*runPos if RUNB */
++
++ runPos <<= 1;
++ continue;
++ }
++ /* When we hit the first non-run symbol after a run,
++ we now know how many times to repeat the last
++ literal, so append that many copies to our buffer
++ of decoded symbols (dbuf) now. (The last literal
++ used is the one at the head of the mtfSymbol
++ array.) */
++ if (runPos) {
++ runPos = 0;
++ if (dbufCount+t >= dbufSize)
++ return RETVAL_DATA_ERROR;
++
++ uc = symToByte[mtfSymbol[0]];
++ byteCount[uc] += t;
++ while (t--)
++ dbuf[dbufCount++] = uc;
++ }
++ /* Is this the terminating symbol? */
++ if (nextSym > symTotal)
++ break;
++ /* At this point, nextSym indicates a new literal
++ character. Subtract one to get the position in the
++ MTF array at which this literal is currently to be
++ found. (Note that the result can't be -1 or 0,
++ because 0 and 1 are RUNA and RUNB. But another
++ instance of the first symbol in the mtf array,
++ position 0, would have been handled as part of a
++ run above. Therefore 1 unused mtf position minus 2
++ non-literal nextSym values equals -1.) */
++ if (dbufCount >= dbufSize)
++ return RETVAL_DATA_ERROR;
++ i = nextSym - 1;
++ uc = mtfSymbol[i];
++ /* Adjust the MTF array. Since we typically expect to
++ *move only a small number of symbols, and are bound
++ *by 256 in any case, using memmove here would
++ *typically be bigger and slower due to function call
++ *overhead and other assorted setup costs. */
++ do {
++ mtfSymbol[i] = mtfSymbol[i-1];
++ } while (--i);
++ mtfSymbol[0] = uc;
++ uc = symToByte[uc];
++ /* We have our literal byte. Save it into dbuf. */
++ byteCount[uc]++;
++ dbuf[dbufCount++] = (unsigned int)uc;
++ }
++ /* At this point, we've read all the Huffman-coded symbols
++ (and repeated runs) for this block from the input stream,
++ and decoded them into the intermediate buffer. There are
++ dbufCount many decoded bytes in dbuf[]. Now undo the
++ Burrows-Wheeler transform on dbuf. See
++ http://dogma.net/markn/articles/bwt/bwt.htm
++ */
++ /* Turn byteCount into cumulative occurrence counts of 0 to n-1. */
++ j = 0;
++ for (i = 0; i < 256; i++) {
++ k = j+byteCount[i];
++ byteCount[i] = j;
++ j = k;
++ }
++ /* Figure out what order dbuf would be in if we sorted it. */
++ for (i = 0; i < dbufCount; i++) {
++ uc = (unsigned char)(dbuf[i] & 0xff);
++ dbuf[byteCount[uc]] |= (i << 8);
++ byteCount[uc]++;
++ }
++ /* Decode first byte by hand to initialize "previous" byte.
++ Note that it doesn't get output, and if the first three
++ characters are identical it doesn't qualify as a run (hence
++ writeRunCountdown = 5). */
++ if (dbufCount) {
++ if (origPtr >= dbufCount)
++ return RETVAL_DATA_ERROR;
++ bd->writePos = dbuf[origPtr];
++ bd->writeCurrent = (unsigned char)(bd->writePos&0xff);
++ bd->writePos >>= 8;
++ bd->writeRunCountdown = 5;
++ }
++ bd->writeCount = dbufCount;
++
++ return RETVAL_OK;
++}
++
++/* Undo burrows-wheeler transform on intermediate buffer to produce output.
++ If start_bunzip was initialized with out_fd =-1, then up to len bytes of
++ data are written to outbuf. Return value is number of bytes written or
++ error (all errors are negative numbers). If out_fd!=-1, outbuf and len
++ are ignored, data is written to out_fd and return is RETVAL_OK or error.
++*/
++
++static int INIT read_bunzip(struct bunzip_data *bd, char *outbuf, int len)
++{
++ const unsigned int *dbuf;
++ int pos, xcurrent, previous, gotcount;
++
++ /* If last read was short due to end of file, return last block now */
++ if (bd->writeCount < 0)
++ return bd->writeCount;
++
++ gotcount = 0;
++ dbuf = bd->dbuf;
++ pos = bd->writePos;
++ xcurrent = bd->writeCurrent;
++
++ /* We will always have pending decoded data to write into the output
++ buffer unless this is the very first call (in which case we haven't
++ Huffman-decoded a block into the intermediate buffer yet). */
++
++ if (bd->writeCopies) {
++ /* Inside the loop, writeCopies means extra copies (beyond 1) */
++ --bd->writeCopies;
++ /* Loop outputting bytes */
++ for (;;) {
++ /* If the output buffer is full, snapshot
++ * state and return */
++ if (gotcount >= len) {
++ bd->writePos = pos;
++ bd->writeCurrent = xcurrent;
++ bd->writeCopies++;
++ return len;
++ }
++ /* Write next byte into output buffer, updating CRC */
++ outbuf[gotcount++] = xcurrent;
++ bd->writeCRC = (((bd->writeCRC) << 8)
++ ^bd->crc32Table[((bd->writeCRC) >> 24)
++ ^xcurrent]);
++ /* Loop now if we're outputting multiple
++ * copies of this byte */
++ if (bd->writeCopies) {
++ --bd->writeCopies;
++ continue;
++ }
++decode_next_byte:
++ if (!bd->writeCount--)
++ break;
++ /* Follow sequence vector to undo
++ * Burrows-Wheeler transform */
++ previous = xcurrent;
++ pos = dbuf[pos];
++ xcurrent = pos&0xff;
++ pos >>= 8;
++ /* After 3 consecutive copies of the same
++ byte, the 4th is a repeat count. We count
++ down from 4 instead *of counting up because
++ testing for non-zero is faster */
++ if (--bd->writeRunCountdown) {
++ if (xcurrent != previous)
++ bd->writeRunCountdown = 4;
++ } else {
++ /* We have a repeated run, this byte
++ * indicates the count */
++ bd->writeCopies = xcurrent;
++ xcurrent = previous;
++ bd->writeRunCountdown = 5;
++ /* Sometimes there are just 3 bytes
++ * (run length 0) */
++ if (!bd->writeCopies)
++ goto decode_next_byte;
++ /* Subtract the 1 copy we'd output
++ * anyway to get extras */
++ --bd->writeCopies;
++ }
++ }
++ /* Decompression of this block completed successfully */
++ bd->writeCRC = ~bd->writeCRC;
++ bd->totalCRC = ((bd->totalCRC << 1) |
++ (bd->totalCRC >> 31)) ^ bd->writeCRC;
++ /* If this block had a CRC error, force file level CRC error. */
++ if (bd->writeCRC != bd->headerCRC) {
++ bd->totalCRC = bd->headerCRC+1;
++ return RETVAL_LAST_BLOCK;
++ }
++ }
++
++ /* Refill the intermediate buffer by Huffman-decoding next
++ * block of input */
++ /* (previous is just a convenient unused temp variable here) */
++ previous = get_next_block(bd);
++ if (previous) {
++ bd->writeCount = previous;
++ return (previous != RETVAL_LAST_BLOCK) ? previous : gotcount;
++ }
++ bd->writeCRC = 0xffffffffUL;
++ pos = bd->writePos;
++ xcurrent = bd->writeCurrent;
++ goto decode_next_byte;
++}
++
++static int INIT nofill(void *buf, unsigned int len)
++{
++ return -1;
++}
++
++/* Allocate the structure, read file header. If in_fd ==-1, inbuf must contain
++ a complete bunzip file (len bytes long). If in_fd!=-1, inbuf and len are
++ ignored, and data is read from file handle into temporary buffer. */
++static int INIT start_bunzip(struct bunzip_data **bdp, void *inbuf, int len,
++ int (*fill)(void*, unsigned int))
++{
++ struct bunzip_data *bd;
++ unsigned int i, j, c;
++ const unsigned int BZh0 =
++ (((unsigned int)'B') << 24)+(((unsigned int)'Z') << 16)
++ +(((unsigned int)'h') << 8)+(unsigned int)'0';
++
++ /* Figure out how much data to allocate */
++ i = sizeof(struct bunzip_data);
++
++ /* Allocate bunzip_data. Most fields initialize to zero. */
++ bd = *bdp = malloc(i);
++ memset(bd, 0, sizeof(struct bunzip_data));
++ /* Setup input buffer */
++ bd->inbuf = inbuf;
++ bd->inbufCount = len;
++ if (fill != NULL)
++ bd->fill = fill;
++ else
++ bd->fill = nofill;
++
++ /* Init the CRC32 table (big endian) */
++ for (i = 0; i < 256; i++) {
++ c = i << 24;
++ for (j = 8; j; j--)
++ c = c&0x80000000 ? (c << 1)^0x04c11db7 : (c << 1);
++ bd->crc32Table[i] = c;
++ }
++
++ /* Ensure that file starts with "BZh['1'-'9']." */
++ i = get_bits(bd, 32);
++ if (((unsigned int)(i-BZh0-1)) >= 9)
++ return RETVAL_NOT_BZIP_DATA;
++
++ /* Fourth byte (ascii '1'-'9'), indicates block size in units of 100k of
++ uncompressed data. Allocate intermediate buffer for block. */
++ bd->dbufSize = 100000*(i-BZh0);
++
++ bd->dbuf = large_malloc(bd->dbufSize * sizeof(int));
++ return RETVAL_OK;
++}
++
++/* Example usage: decompress src_fd to dst_fd. (Stops at end of bzip2 data,
++ not end of file.) */
++STATIC int INIT bunzip2(unsigned char *buf, int len,
++ int(*fill)(void*, unsigned int),
++ int(*flush)(void*, unsigned int),
++ unsigned char *outbuf,
++ int *pos,
++ void(*error_fn)(char *x))
++{
++ struct bunzip_data *bd;
++ int i = -1;
++ unsigned char *inbuf;
++
++ set_error_fn(error_fn);
++ if (flush)
++ outbuf = malloc(BZIP2_IOBUF_SIZE);
++ else
++ len -= 4; /* Uncompressed size hack active in pre-boot
++ environment */
++ if (!outbuf) {
++ error("Could not allocate output bufer");
++ return -1;
++ }
++ if (buf)
++ inbuf = buf;
++ else
++ inbuf = malloc(BZIP2_IOBUF_SIZE);
++ if (!inbuf) {
++ error("Could not allocate input bufer");
++ goto exit_0;
++ }
++ i = start_bunzip(&bd, inbuf, len, fill);
++ if (!i) {
++ for (;;) {
++ i = read_bunzip(bd, outbuf, BZIP2_IOBUF_SIZE);
++ if (i <= 0)
++ break;
++ if (!flush)
++ outbuf += i;
++ else
++ if (i != flush(outbuf, i)) {
++ i = RETVAL_UNEXPECTED_OUTPUT_EOF;
++ break;
++ }
++ }
++ }
++ /* Check CRC and release memory */
++ if (i == RETVAL_LAST_BLOCK) {
++ if (bd->headerCRC != bd->totalCRC)
++ error("Data integrity error when decompressing.");
++ else
++ i = RETVAL_OK;
++ } else if (i == RETVAL_UNEXPECTED_OUTPUT_EOF) {
++ error("Compressed file ends unexpectedly");
++ }
++ if (bd->dbuf)
++ large_free(bd->dbuf);
++ if (pos)
++ *pos = bd->inbufPos;
++ free(bd);
++ if (!buf)
++ free(inbuf);
++exit_0:
++ if (flush)
++ free(outbuf);
++ return i;
++}
++
++#define decompress bunzip2
+diff -purN linux-2.6.27.6/lib/decompress_unlzma.c linux-2.6.27.6udpcast/lib/decompress_unlzma.c
+--- linux-2.6.27.6/lib/decompress_unlzma.c 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.27.6udpcast/lib/decompress_unlzma.c 2008-11-16 23:40:21.000000000 +0100
+@@ -0,0 +1,647 @@
++/* Lzma decompressor for Linux kernel. Shamelessly snarfed
++ *from busybox 1.1.1
++ *
++ *Linux kernel adaptation
++ *Copyright (C) 2006 Alain < alain@knaff.lu >
++ *
++ *Based on small lzma deflate implementation/Small range coder
++ *implementation for lzma.
++ *Copyright (C) 2006 Aurelien Jacobs < aurel@gnuage.org >
++ *
++ *Based on LzmaDecode.c from the LZMA SDK 4.22 (http://www.7-zip.org/)
++ *Copyright (C) 1999-2005 Igor Pavlov
++ *
++ *Copyrights of the parts, see headers below.
++ *
++ *
++ *This program is free software; you can redistribute it and/or
++ *modify it under the terms of the GNU Lesser General Public
++ *License as published by the Free Software Foundation; either
++ *version 2.1 of the License, or (at your option) any later version.
++ *
++ *This program is distributed in the hope that it will be useful,
++ *but WITHOUT ANY WARRANTY; without even the implied warranty of
++ *MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
++ *Lesser General Public License for more details.
++ *
++ *You should have received a copy of the GNU Lesser General Public
++ *License along with this library; if not, write to the Free Software
++ *Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ */
++
++#ifndef STATIC
++#include <linux/decompress/unlzma.h>
++#endif /* STATIC */
++
++#include <linux/decompress/mm.h>
++
++#define MIN(a, b) (((a) < (b)) ? (a) : (b))
++
++static long long INIT read_int(unsigned char *ptr, int size)
++{
++ int i;
++ long long ret = 0;
++
++ for (i = 0; i < size; i++)
++ ret = (ret << 8) | ptr[size-i-1];
++ return ret;
++}
++
++#define ENDIAN_CONVERT(x) \
++ x = (typeof(x))read_int((unsigned char *)&x, sizeof(x))
++
++
++/* Small range coder implementation for lzma.
++ *Copyright (C) 2006 Aurelien Jacobs < aurel@gnuage.org >
++ *
++ *Based on LzmaDecode.c from the LZMA SDK 4.22 (http://www.7-zip.org/)
++ *Copyright (c) 1999-2005 Igor Pavlov
++ */
++
++#include <linux/compiler.h>
++
++#define LZMA_IOBUF_SIZE 0x10000
++
++struct rc {
++ int (*fill)(void*, unsigned int);
++ uint8_t *ptr;
++ uint8_t *buffer;
++ uint8_t *buffer_end;
++ int buffer_size;
++ uint32_t code;
++ uint32_t range;
++ uint32_t bound;
++};
++
++
++#define RC_TOP_BITS 24
++#define RC_MOVE_BITS 5
++#define RC_MODEL_TOTAL_BITS 11
++
++
++/* Called twice: once at startup and once in rc_normalize() */
++static void INIT rc_read(struct rc *rc)
++{
++ rc->buffer_size = rc->fill((char *)rc->buffer, LZMA_IOBUF_SIZE);
++ if (rc->buffer_size <= 0)
++ error("unexpected EOF");
++ rc->ptr = rc->buffer;
++ rc->buffer_end = rc->buffer + rc->buffer_size;
++}
++
++/* Called once */
++static inline void INIT rc_init(struct rc *rc,
++ int (*fill)(void*, unsigned int),
++ char *buffer, int buffer_size)
++{
++ rc->fill = fill;
++ rc->buffer = (uint8_t *)buffer;
++ rc->buffer_size = buffer_size;
++ rc->buffer_end = rc->buffer + rc->buffer_size;
++ rc->ptr = rc->buffer;
++
++ rc->code = 0;
++ rc->range = 0xFFFFFFFF;
++}
++
++static inline void INIT rc_init_code(struct rc *rc)
++{
++ int i;
++
++ for (i = 0; i < 5; i++) {
++ if (rc->ptr >= rc->buffer_end)
++ rc_read(rc);
++ rc->code = (rc->code << 8) | *rc->ptr++;
++ }
++}
++
++
++/* Called once. TODO: bb_maybe_free() */
++static inline void INIT rc_free(struct rc *rc)
++{
++ free(rc->buffer);
++}
++
++/* Called twice, but one callsite is in inline'd rc_is_bit_0_helper() */
++static void INIT rc_do_normalize(struct rc *rc)
++{
++ if (rc->ptr >= rc->buffer_end)
++ rc_read(rc);
++ rc->range <<= 8;
++ rc->code = (rc->code << 8) | *rc->ptr++;
++}
++static inline void INIT rc_normalize(struct rc *rc)
++{
++ if (rc->range < (1 << RC_TOP_BITS))
++ rc_do_normalize(rc);
++}
++
++/* Called 9 times */
++/* Why rc_is_bit_0_helper exists?
++ *Because we want to always expose (rc->code < rc->bound) to optimizer
++ */
++static inline uint32_t INIT rc_is_bit_0_helper(struct rc *rc, uint16_t *p)
++{
++ rc_normalize(rc);
++ rc->bound = *p * (rc->range >> RC_MODEL_TOTAL_BITS);
++ return rc->bound;
++}
++static inline int INIT rc_is_bit_0(struct rc *rc, uint16_t *p)
++{
++ uint32_t t = rc_is_bit_0_helper(rc, p);
++ return rc->code < t;
++}
++
++/* Called ~10 times, but very small, thus inlined */
++static inline void INIT rc_update_bit_0(struct rc *rc, uint16_t *p)
++{
++ rc->range = rc->bound;
++ *p += ((1 << RC_MODEL_TOTAL_BITS) - *p) >> RC_MOVE_BITS;
++}
++static inline void rc_update_bit_1(struct rc *rc, uint16_t *p)
++{
++ rc->range -= rc->bound;
++ rc->code -= rc->bound;
++ *p -= *p >> RC_MOVE_BITS;
++}
++
++/* Called 4 times in unlzma loop */
++static int INIT rc_get_bit(struct rc *rc, uint16_t *p, int *symbol)
++{
++ if (rc_is_bit_0(rc, p)) {
++ rc_update_bit_0(rc, p);
++ *symbol *= 2;
++ return 0;
++ } else {
++ rc_update_bit_1(rc, p);
++ *symbol = *symbol * 2 + 1;
++ return 1;
++ }
++}
++
++/* Called once */
++static inline int INIT rc_direct_bit(struct rc *rc)
++{
++ rc_normalize(rc);
++ rc->range >>= 1;
++ if (rc->code >= rc->range) {
++ rc->code -= rc->range;
++ return 1;
++ }
++ return 0;
++}
++
++/* Called twice */
++static inline void INIT
++rc_bit_tree_decode(struct rc *rc, uint16_t *p, int num_levels, int *symbol)
++{
++ int i = num_levels;
++
++ *symbol = 1;
++ while (i--)
++ rc_get_bit(rc, p + *symbol, symbol);
++ *symbol -= 1 << num_levels;
++}
++
++
++/*
++ * Small lzma deflate implementation.
++ * Copyright (C) 2006 Aurelien Jacobs < aurel@gnuage.org >
++ *
++ * Based on LzmaDecode.c from the LZMA SDK 4.22 (http://www.7-zip.org/)
++ * Copyright (C) 1999-2005 Igor Pavlov
++ */
++
++
++struct lzma_header {
++ uint8_t pos;
++ uint32_t dict_size;
++ uint64_t dst_size;
++} __attribute__ ((packed)) ;
++
++
++#define LZMA_BASE_SIZE 1846
++#define LZMA_LIT_SIZE 768
++
++#define LZMA_NUM_POS_BITS_MAX 4
++
++#define LZMA_LEN_NUM_LOW_BITS 3
++#define LZMA_LEN_NUM_MID_BITS 3
++#define LZMA_LEN_NUM_HIGH_BITS 8
++
++#define LZMA_LEN_CHOICE 0
++#define LZMA_LEN_CHOICE_2 (LZMA_LEN_CHOICE + 1)
++#define LZMA_LEN_LOW (LZMA_LEN_CHOICE_2 + 1)
++#define LZMA_LEN_MID (LZMA_LEN_LOW \
++ + (1 << (LZMA_NUM_POS_BITS_MAX + LZMA_LEN_NUM_LOW_BITS)))
++#define LZMA_LEN_HIGH (LZMA_LEN_MID \
++ +(1 << (LZMA_NUM_POS_BITS_MAX + LZMA_LEN_NUM_MID_BITS)))
++#define LZMA_NUM_LEN_PROBS (LZMA_LEN_HIGH + (1 << LZMA_LEN_NUM_HIGH_BITS))
++
++#define LZMA_NUM_STATES 12
++#define LZMA_NUM_LIT_STATES 7
++
++#define LZMA_START_POS_MODEL_INDEX 4
++#define LZMA_END_POS_MODEL_INDEX 14
++#define LZMA_NUM_FULL_DISTANCES (1 << (LZMA_END_POS_MODEL_INDEX >> 1))
++
++#define LZMA_NUM_POS_SLOT_BITS 6
++#define LZMA_NUM_LEN_TO_POS_STATES 4
++
++#define LZMA_NUM_ALIGN_BITS 4
++
++#define LZMA_MATCH_MIN_LEN 2
++
++#define LZMA_IS_MATCH 0
++#define LZMA_IS_REP (LZMA_IS_MATCH + (LZMA_NUM_STATES << LZMA_NUM_POS_BITS_MAX))
++#define LZMA_IS_REP_G0 (LZMA_IS_REP + LZMA_NUM_STATES)
++#define LZMA_IS_REP_G1 (LZMA_IS_REP_G0 + LZMA_NUM_STATES)
++#define LZMA_IS_REP_G2 (LZMA_IS_REP_G1 + LZMA_NUM_STATES)
++#define LZMA_IS_REP_0_LONG (LZMA_IS_REP_G2 + LZMA_NUM_STATES)
++#define LZMA_POS_SLOT (LZMA_IS_REP_0_LONG \
++ + (LZMA_NUM_STATES << LZMA_NUM_POS_BITS_MAX))
++#define LZMA_SPEC_POS (LZMA_POS_SLOT \
++ +(LZMA_NUM_LEN_TO_POS_STATES << LZMA_NUM_POS_SLOT_BITS))
++#define LZMA_ALIGN (LZMA_SPEC_POS \
++ + LZMA_NUM_FULL_DISTANCES - LZMA_END_POS_MODEL_INDEX)
++#define LZMA_LEN_CODER (LZMA_ALIGN + (1 << LZMA_NUM_ALIGN_BITS))
++#define LZMA_REP_LEN_CODER (LZMA_LEN_CODER + LZMA_NUM_LEN_PROBS)
++#define LZMA_LITERAL (LZMA_REP_LEN_CODER + LZMA_NUM_LEN_PROBS)
++
++
++struct writer {
++ uint8_t *buffer;
++ uint8_t previous_byte;
++ size_t buffer_pos;
++ int bufsize;
++ size_t global_pos;
++ int(*flush)(void*, unsigned int);
++ struct lzma_header *header;
++};
++
++struct cstate {
++ int state;
++ uint32_t rep0, rep1, rep2, rep3;
++};
++
++static inline size_t INIT get_pos(struct writer *wr)
++{
++ return
++ wr->global_pos + wr->buffer_pos;
++}
++
++static inline uint8_t INIT peek_old_byte(struct writer *wr,
++ uint32_t offs)
++{
++ if (!wr->flush) {
++ int32_t pos;
++ while (offs > wr->header->dict_size)
++ offs -= wr->header->dict_size;
++ pos = wr->buffer_pos - offs;
++ return wr->buffer[pos];
++ } else {
++ uint32_t pos = wr->buffer_pos - offs;
++ while (pos >= wr->header->dict_size)
++ pos += wr->header->dict_size;
++ return wr->buffer[pos];
++ }
++
++}
++
++static inline void INIT write_byte(struct writer *wr, uint8_t byte)
++{
++ wr->buffer[wr->buffer_pos++] = wr->previous_byte = byte;
++ if (wr->flush && wr->buffer_pos == wr->header->dict_size) {
++ wr->buffer_pos = 0;
++ wr->global_pos += wr->header->dict_size;
++ wr->flush((char *)wr->buffer, wr->header->dict_size);
++ }
++}
++
++
++static inline void INIT copy_byte(struct writer *wr, uint32_t offs)
++{
++ write_byte(wr, peek_old_byte(wr, offs));
++}
++
++static inline void INIT copy_bytes(struct writer *wr,
++ uint32_t rep0, int len)
++{
++ do {
++ copy_byte(wr, rep0);
++ len--;
++ } while (len != 0 && wr->buffer_pos < wr->header->dst_size);
++}
++
++static inline void INIT process_bit0(struct writer *wr, struct rc *rc,
++ struct cstate *cst, uint16_t *p,
++ int pos_state, uint16_t *prob,
++ int lc, uint32_t literal_pos_mask) {
++ int mi = 1;
++ rc_update_bit_0(rc, prob);
++ prob = (p + LZMA_LITERAL +
++ (LZMA_LIT_SIZE
++ * (((get_pos(wr) & literal_pos_mask) << lc)
++ + (wr->previous_byte >> (8 - lc))))
++ );
++
++ if (cst->state >= LZMA_NUM_LIT_STATES) {
++ int match_byte = peek_old_byte(wr, cst->rep0);
++ do {
++ int bit;
++ uint16_t *prob_lit;
++
++ match_byte <<= 1;
++ bit = match_byte & 0x100;
++ prob_lit = prob + 0x100 + bit + mi;
++ if (rc_get_bit(rc, prob_lit, &mi)) {
++ if (!bit)
++ break;
++ } else {
++ if (bit)
++ break;
++ }
++ } while (mi < 0x100);
++ }
++ while (mi < 0x100) {
++ uint16_t *prob_lit = prob + mi;
++ rc_get_bit(rc, prob_lit, &mi);
++ }
++ write_byte(wr, mi);
++ if (cst->state < 4)
++ cst->state = 0;
++ else if (cst->state < 10)
++ cst->state -= 3;
++ else
++ cst->state -= 6;
++}
++
++static inline void INIT process_bit1(struct writer *wr, struct rc *rc,
++ struct cstate *cst, uint16_t *p,
++ int pos_state, uint16_t *prob) {
++ int offset;
++ uint16_t *prob_len;
++ int num_bits;
++ int len;
++
++ rc_update_bit_1(rc, prob);
++ prob = p + LZMA_IS_REP + cst->state;
++ if (rc_is_bit_0(rc, prob)) {
++ rc_update_bit_0(rc, prob);
++ cst->rep3 = cst->rep2;
++ cst->rep2 = cst->rep1;
++ cst->rep1 = cst->rep0;
++ cst->state = cst->state < LZMA_NUM_LIT_STATES ? 0 : 3;
++ prob = p + LZMA_LEN_CODER;
++ } else {
++ rc_update_bit_1(rc, prob);
++ prob = p + LZMA_IS_REP_G0 + cst->state;
++ if (rc_is_bit_0(rc, prob)) {
++ rc_update_bit_0(rc, prob);
++ prob = (p + LZMA_IS_REP_0_LONG
++ + (cst->state <<
++ LZMA_NUM_POS_BITS_MAX) +
++ pos_state);
++ if (rc_is_bit_0(rc, prob)) {
++ rc_update_bit_0(rc, prob);
++
++ cst->state = cst->state < LZMA_NUM_LIT_STATES ?
++ 9 : 11;
++ copy_byte(wr, cst->rep0);
++ return;
++ } else {
++ rc_update_bit_1(rc, prob);
++ }
++ } else {
++ uint32_t distance;
++
++ rc_update_bit_1(rc, prob);
++ prob = p + LZMA_IS_REP_G1 + cst->state;
++ if (rc_is_bit_0(rc, prob)) {
++ rc_update_bit_0(rc, prob);
++ distance = cst->rep1;
++ } else {
++ rc_update_bit_1(rc, prob);
++ prob = p + LZMA_IS_REP_G2 + cst->state;
++ if (rc_is_bit_0(rc, prob)) {
++ rc_update_bit_0(rc, prob);
++ distance = cst->rep2;
++ } else {
++ rc_update_bit_1(rc, prob);
++ distance = cst->rep3;
++ cst->rep3 = cst->rep2;
++ }
++ cst->rep2 = cst->rep1;
++ }
++ cst->rep1 = cst->rep0;
++ cst->rep0 = distance;
++ }
++ cst->state = cst->state < LZMA_NUM_LIT_STATES ? 8 : 11;
++ prob = p + LZMA_REP_LEN_CODER;
++ }
++
++ prob_len = prob + LZMA_LEN_CHOICE;
++ if (rc_is_bit_0(rc, prob_len)) {
++ rc_update_bit_0(rc, prob_len);
++ prob_len = (prob + LZMA_LEN_LOW
++ + (pos_state <<
++ LZMA_LEN_NUM_LOW_BITS));
++ offset = 0;
++ num_bits = LZMA_LEN_NUM_LOW_BITS;
++ } else {
++ rc_update_bit_1(rc, prob_len);
++ prob_len = prob + LZMA_LEN_CHOICE_2;
++ if (rc_is_bit_0(rc, prob_len)) {
++ rc_update_bit_0(rc, prob_len);
++ prob_len = (prob + LZMA_LEN_MID
++ + (pos_state <<
++ LZMA_LEN_NUM_MID_BITS));
++ offset = 1 << LZMA_LEN_NUM_LOW_BITS;
++ num_bits = LZMA_LEN_NUM_MID_BITS;
++ } else {
++ rc_update_bit_1(rc, prob_len);
++ prob_len = prob + LZMA_LEN_HIGH;
++ offset = ((1 << LZMA_LEN_NUM_LOW_BITS)
++ + (1 << LZMA_LEN_NUM_MID_BITS));
++ num_bits = LZMA_LEN_NUM_HIGH_BITS;
++ }
++ }
++
++ rc_bit_tree_decode(rc, prob_len, num_bits, &len);
++ len += offset;
++
++ if (cst->state < 4) {
++ int pos_slot;
++
++ cst->state += LZMA_NUM_LIT_STATES;
++ prob =
++ p + LZMA_POS_SLOT +
++ ((len <
++ LZMA_NUM_LEN_TO_POS_STATES ? len :
++ LZMA_NUM_LEN_TO_POS_STATES - 1)
++ << LZMA_NUM_POS_SLOT_BITS);
++ rc_bit_tree_decode(rc, prob,
++ LZMA_NUM_POS_SLOT_BITS,
++ &pos_slot);
++ if (pos_slot >= LZMA_START_POS_MODEL_INDEX) {
++ int i, mi;
++ num_bits = (pos_slot >> 1) - 1;
++ cst->rep0 = 2 | (pos_slot & 1);
++ if (pos_slot < LZMA_END_POS_MODEL_INDEX) {
++ cst->rep0 <<= num_bits;
++ prob = p + LZMA_SPEC_POS +
++ cst->rep0 - pos_slot - 1;
++ } else {
++ num_bits -= LZMA_NUM_ALIGN_BITS;
++ while (num_bits--)
++ cst->rep0 = (cst->rep0 << 1) |
++ rc_direct_bit(rc);
++ prob = p + LZMA_ALIGN;
++ cst->rep0 <<= LZMA_NUM_ALIGN_BITS;
++ num_bits = LZMA_NUM_ALIGN_BITS;
++ }
++ i = 1;
++ mi = 1;
++ while (num_bits--) {
++ if (rc_get_bit(rc, prob + mi, &mi))
++ cst->rep0 |= i;
++ i <<= 1;
++ }
++ } else
++ cst->rep0 = pos_slot;
++ if (++(cst->rep0) == 0)
++ return;
++ }
++
++ len += LZMA_MATCH_MIN_LEN;
++
++ copy_bytes(wr, cst->rep0, len);
++}
++
++
++
++STATIC inline int INIT unlzma(unsigned char *buf, int in_len,
++ int(*fill)(void*, unsigned int),
++ int(*flush)(void*, unsigned int),
++ unsigned char *output,
++ int *posp,
++ void(*error_fn)(char *x)
++ )
++{
++ struct lzma_header header;
++ int lc, pb, lp;
++ uint32_t pos_state_mask;
++ uint32_t literal_pos_mask;
++ uint16_t *p;
++ int num_probs;
++ struct rc rc;
++ int i, mi;
++ struct writer wr;
++ struct cstate cst;
++ unsigned char *inbuf;
++ int ret = -1;
++
++ set_error_fn(error_fn);
++ if (!flush)
++ in_len -= 4; /* Uncompressed size hack active in pre-boot
++ environment */
++ if (buf)
++ inbuf = buf;
++ else
++ inbuf = malloc(LZMA_IOBUF_SIZE);
++ if (!inbuf) {
++ error("Could not allocate input bufer");
++ goto exit_0;
++ }
++
++ cst.state = 0;
++ cst.rep0 = cst.rep1 = cst.rep2 = cst.rep3 = 1;
++
++ wr.header = &header;
++ wr.flush = flush;
++ wr.global_pos = 0;
++ wr.previous_byte = 0;
++ wr.buffer_pos = 0;
++
++ rc_init(&rc, fill, inbuf, in_len);
++
++ for (i = 0; i < sizeof(header); i++) {
++ if (rc.ptr >= rc.buffer_end)
++ rc_read(&rc);
++ ((unsigned char *)&header)[i] = *rc.ptr++;
++ }
++
++ if (header.pos >= (9 * 5 * 5))
++ error("bad header");
++
++ mi = 0;
++ lc = header.pos;
++ while (lc >= 9) {
++ mi++;
++ lc -= 9;
++ }
++ pb = 0;
++ lp = mi;
++ while (lp >= 5) {
++ pb++;
++ lp -= 5;
++ }
++ pos_state_mask = (1 << pb) - 1;
++ literal_pos_mask = (1 << lp) - 1;
++
++ ENDIAN_CONVERT(header.dict_size);
++ ENDIAN_CONVERT(header.dst_size);
++
++ if (header.dict_size == 0)
++ header.dict_size = 1;
++
++ if (output)
++ wr.buffer = output;
++ else {
++ wr.bufsize = MIN(header.dst_size, header.dict_size);
++ wr.buffer = large_malloc(wr.bufsize);
++ }
++ if (wr.buffer == NULL)
++ goto exit_1;
++
++ num_probs = LZMA_BASE_SIZE + (LZMA_LIT_SIZE << (lc + lp));
++ p = (uint16_t *) large_malloc(num_probs * sizeof(*p));
++ if (p == 0)
++ goto exit_2;
++ num_probs = LZMA_LITERAL + (LZMA_LIT_SIZE << (lc + lp));
++ for (i = 0; i < num_probs; i++)
++ p[i] = (1 << RC_MODEL_TOTAL_BITS) >> 1;
++
++ rc_init_code(&rc);
++
++ while (get_pos(&wr) < header.dst_size) {
++ int pos_state = get_pos(&wr) & pos_state_mask;
++ uint16_t *prob = p + LZMA_IS_MATCH +
++ (cst.state << LZMA_NUM_POS_BITS_MAX) + pos_state;
++ if (rc_is_bit_0(&rc, prob))
++ process_bit0(&wr, &rc, &cst, p, pos_state, prob,
++ lc, literal_pos_mask);
++ else {
++ process_bit1(&wr, &rc, &cst, p, pos_state, prob);
++ if (cst.rep0 == 0)
++ break;
++ }
++ }
++
++ if (posp)
++ *posp = rc.ptr-rc.buffer;
++ if (wr.flush)
++ wr.flush(wr.buffer, wr.buffer_pos);
++ ret = 0;
++ large_free(p);
++exit_2:
++ if (!output)
++ large_free(wr.buffer);
++exit_1:
++ if (!buf)
++ free(inbuf);
++exit_0:
++ return ret;
++}
++
++#define decompress unlzma
+diff -purN linux-2.6.27.6/lib/inflate.c linux-2.6.27.6udpcast/lib/inflate.c
+--- linux-2.6.27.6/lib/inflate.c 2008-11-13 18:56:21.000000000 +0100
++++ linux-2.6.27.6udpcast/lib/inflate.c 2008-11-16 23:02:55.000000000 +0100
+@@ -109,20 +109,78 @@ static char rcsid[] = "#Id: inflate.c,v
+ #endif
+
+ #ifndef STATIC
++#include <linux/decompress/inflate.h>
++#endif /* ! STATIC */
+
+-#if defined(STDC_HEADERS) || defined(HAVE_STDLIB_H)
+-# include <sys/types.h>
+-# include <stdlib.h>
++#include <linux/decompress/mm.h>
++
++#include <linux/string.h>
++
++#ifdef NEW_CODE
++static int(*flush_cb)(void*, unsigned int);
++static int(*fill_cb)(void*, unsigned int);
++
++/* Begin stuff copied from initramfs */
++/*
++ * gzip declarations
++ */
++
++#define OF(args) args
++
++#ifndef memzero
++#define memzero(s, n) memset((s), 0, (n))
+ #endif
+
+-#include "gzip.h"
+-#define STATIC
+-#endif /* !STATIC */
++#define INBUFSIZ 4096
++
++#define WSIZE 0x8000 /* window size--must be a power of two, and */
++ /* at least 32K for zip's deflate method */
++
++static uint8_t *inbuf;
++static uint8_t *window;
++
++static unsigned insize; /* valid bytes in inbuf */
++static unsigned outcnt; /* bytes in output buffer */
++static long bytes_out;
++
++/* --- */
++
++static unsigned inptr; /* index of next byte to be processed in inbuf */
++
++/* --- */
++
++/* ===========================================================================
++ * Fill the input buffer. This is called only when the buffer is empty
++ * and at least one byte is really needed.
++ * Returning -1 does not guarantee that gunzip() will ever return.
++ */
++static int INIT fill_inbuf(void)
++{
++ insize = fill_cb(inbuf, INBUFSIZ);
++ if (insize <= 0) {
++ error("RAMDISK: ran out of compressed data");
++ return -1;
++ }
++
++ inptr = 1;
++
++ return inbuf[0];
++}
++
++#define get_byte() (inptr < insize ? inbuf[inptr++] : fill_inbuf())
++
++/* Diagnostic functions (stubbed out) */
++#define Assert(cond, msg)
++#define Trace(x)
++#define Tracev(x)
++#define Tracevv(x)
++#define Tracec(c, x)
++#define Tracecv(c, x)
+
+-#ifndef INIT
+-#define INIT
++static void flush_window(void);
++/* End stuff copied from initramfs */
+ #endif
+-
++
+ #define slide window
+
+ /* Huffman code lookup table entry--this entry is four bytes for machines
+@@ -133,10 +191,10 @@ static char rcsid[] = "#Id: inflate.c,v
+ an unused code. If a code with e == 99 is looked up, this implies an
+ error in the data. */
+ struct huft {
+- uch e; /* number of extra bits or operation */
+- uch b; /* number of bits in this code or subcode */
++ uint8_t e; /* number of extra bits or operation */
++ uint8_t b; /* number of bits in this code or subcode */
+ union {
+- ush n; /* literal, length base, or distance base */
++ uint16_t n; /* literal, length base, or distance base */
+ struct huft *t; /* pointer to next level of table */
+ } v;
+ };
+@@ -144,7 +202,7 @@ struct huft {
+
+ /* Function prototypes */
+ STATIC int INIT huft_build OF((unsigned *, unsigned, unsigned,
+- const ush *, const ush *, struct huft **, int *));
++ const uint16_t *, const uint16_t *, struct huft **, int *));
+ STATIC int INIT huft_free OF((struct huft *));
+ STATIC int INIT inflate_codes OF((struct huft *, struct huft *, int, int));
+ STATIC int INIT inflate_stored OF((void));
+@@ -159,28 +217,28 @@ STATIC int INIT inflate OF((void));
+ circular buffer. The index is updated simply by incrementing and then
+ ANDing with 0x7fff (32K-1). */
+ /* It is left to other modules to supply the 32 K area. It is assumed
+- to be usable as if it were declared "uch slide[32768];" or as just
+- "uch *slide;" and then malloc'ed in the latter case. The definition
++ to be usable as if it were declared "uint8_t slide[32768];" or as just
++ "uint8_t *slide;" and then malloc'ed in the latter case. The definition
+ must be in unzip.h, included above. */
+ /* unsigned wp; current position in slide */
+ #define wp outcnt
+ #define flush_output(w) (wp=(w),flush_window())
+
+ /* Tables for deflate from PKZIP's appnote.txt. */
+-static const unsigned border[] = { /* Order of the bit length code lengths */
++static const unsigned border[] = { /* Order of the bit length code lengths */
+ 16, 17, 18, 0, 8, 7, 9, 6, 10, 5, 11, 4, 12, 3, 13, 2, 14, 1, 15};
+-static const ush cplens[] = { /* Copy lengths for literal codes 257..285 */
++static const uint16_t cplens[] = { /* Copy lengths for literal codes 257..285 */
+ 3, 4, 5, 6, 7, 8, 9, 10, 11, 13, 15, 17, 19, 23, 27, 31,
+ 35, 43, 51, 59, 67, 83, 99, 115, 131, 163, 195, 227, 258, 0, 0};
+ /* note: see note #13 above about the 258 in this list. */
+-static const ush cplext[] = { /* Extra bits for literal codes 257..285 */
++static const uint16_t cplext[] = { /* Extra bits for literal codes 257..285 */
+ 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 2, 2, 2, 2,
+ 3, 3, 3, 3, 4, 4, 4, 4, 5, 5, 5, 5, 0, 99, 99}; /* 99==invalid */
+-static const ush cpdist[] = { /* Copy offsets for distance codes 0..29 */
++static const uint16_t cpdist[] = { /* Copy offsets for distance codes 0..29 */
+ 1, 2, 3, 4, 5, 7, 9, 13, 17, 25, 33, 49, 65, 97, 129, 193,
+ 257, 385, 513, 769, 1025, 1537, 2049, 3073, 4097, 6145,
+ 8193, 12289, 16385, 24577};
+-static const ush cpdext[] = { /* Extra bits for distance codes */
++static const uint16_t cpdext[] = { /* Extra bits for distance codes */
+ 0, 0, 0, 0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6,
+ 7, 7, 8, 8, 9, 9, 10, 10, 11, 11,
+ 12, 12, 13, 13};
+@@ -217,59 +275,21 @@ static const ush cpdext[] = { /*
+ the stream.
+ */
+
+-STATIC ulg bb; /* bit buffer */
++STATIC uint32_t bb; /* bit buffer */
+ STATIC unsigned bk; /* bits in bit buffer */
+
+-STATIC const ush mask_bits[] = {
++STATIC const uint16_t mask_bits[] = {
+ 0x0000,
+ 0x0001, 0x0003, 0x0007, 0x000f, 0x001f, 0x003f, 0x007f, 0x00ff,
+ 0x01ff, 0x03ff, 0x07ff, 0x0fff, 0x1fff, 0x3fff, 0x7fff, 0xffff
+ };
+
+-#define NEXTBYTE() ({ int v = get_byte(); if (v < 0) goto underrun; (uch)v; })
+-#define NEEDBITS(n) {while(k<(n)){b|=((ulg)NEXTBYTE())<<k;k+=8;}}
++#define NEXTBYTE() ({ int v = get_byte(); if (v < 0) goto underrun; \
++ (uint8_t)v; })
++#define NEEDBITS(n) {while (k < (n)) \
++ {b |= ((uint32_t)NEXTBYTE())<<k; k += 8; } }
+ #define DUMPBITS(n) {b>>=(n);k-=(n);}
+
+-#ifndef NO_INFLATE_MALLOC
+-/* A trivial malloc implementation, adapted from
+- * malloc by Hannu Savolainen 1993 and Matthias Urlichs 1994
+- */
+-
+-static unsigned long malloc_ptr;
+-static int malloc_count;
+-
+-static void *malloc(int size)
+-{
+- void *p;
+-
+- if (size < 0)
+- error("Malloc error");
+- if (!malloc_ptr)
+- malloc_ptr = free_mem_ptr;
+-
+- malloc_ptr = (malloc_ptr + 3) & ~3; /* Align */
+-
+- p = (void *)malloc_ptr;
+- malloc_ptr += size;
+-
+- if (free_mem_end_ptr && malloc_ptr >= free_mem_end_ptr)
+- error("Out of memory");
+-
+- malloc_count++;
+- return p;
+-}
+-
+-static void free(void *where)
+-{
+- malloc_count--;
+- if (!malloc_count)
+- malloc_ptr = free_mem_ptr;
+-}
+-#else
+-#define malloc(a) kmalloc(a, GFP_KERNEL)
+-#define free(a) kfree(a)
+-#endif
+-
+ /*
+ Huffman code decoding is performed using a multi-level table lookup.
+ The fastest way to decode is to simply build a lookup table whose
+@@ -307,7 +327,7 @@ STATIC const int lbits = 9; /*
+ STATIC const int dbits = 6; /* bits in base distance lookup table */
+
+
+-/* If BMAX needs to be larger than 16, then h and x[] should be ulg. */
++/* If BMAX needs to be larger than 16, then h and x[] should be uint32_t. */
+ #define BMAX 16 /* maximum bit length of any code (16 for explode) */
+ #define N_MAX 288 /* maximum number of codes in any set */
+
+@@ -319,8 +339,8 @@ STATIC int INIT huft_build(
+ unsigned *b, /* code lengths in bits (all assumed <= BMAX) */
+ unsigned n, /* number of codes (assumed <= N_MAX) */
+ unsigned s, /* number of simple-valued codes (0..s-1) */
+- const ush *d, /* list of base values for non-simple codes */
+- const ush *e, /* list of extra bits for non-simple codes */
++ const uint16_t *d, /* list of base values for non-simple codes */
++ const uint16_t *e, /* list of extra bits for non-simple codes */
+ struct huft **t, /* result: starting table */
+ int *m /* maximum lookup bits, returns actual */
+ )
+@@ -500,8 +520,8 @@ DEBG1("5 ");
+ if (h)
+ {
+ x[h] = i; /* save pattern for backing up */
+- r.b = (uch)l; /* bits to dump before this table */
+- r.e = (uch)(16 + j); /* bits in this table */
++ r.b = (uint8_t)l; /* bits to dump before this table */
++ r.e = (uint8_t)(16 + j); /* bits in this table */
+ r.v.t = q; /* pointer to this table */
+ j = i >> (w - l); /* (get around Turbo C bug) */
+ u[h-1][j] = r; /* connect to last table */
+@@ -511,18 +531,18 @@ DEBG1("6 ");
+ DEBG("h6c ");
+
+ /* set up table entry in r */
+- r.b = (uch)(k - w);
++ r.b = (uint8_t)(k - w);
+ if (p >= v + n)
+ r.e = 99; /* out of values--invalid code */
+ else if (*p < s)
+ {
+- r.e = (uch)(*p < 256 ? 16 : 15); /* 256 is end-of-block code */
+- r.v.n = (ush)(*p); /* simple code is just the value */
++ r.e = (uint8_t)(*p < 256 ? 16 : 15); /* 256 is end-of-block code */
++ r.v.n = (uint16_t)(*p); /* simple code is just the value */
+ p++; /* one compiler does not like *p++ */
+ }
+ else
+ {
+- r.e = (uch)e[*p - s]; /* non-simple--look up in lists */
++ r.e = (uint8_t)e[*p - s]; /* non-simple--look up in lists */
+ r.v.n = d[*p++ - s];
+ }
+ DEBG("h6d ");
+@@ -592,11 +612,12 @@ STATIC int INIT inflate_codes(
+ Return an error code or zero if it all goes ok. */
+ {
+ register unsigned e; /* table entry flag/number of extra bits */
+- unsigned n, d; /* length and index for copy */
++ unsigned n;
++ int d; /* source index for copy */
+ unsigned w; /* current window position */
+ struct huft *t; /* pointer to table entry */
+ unsigned ml, md; /* masks for bl and bd bits */
+- register ulg b; /* bit buffer */
++ register uint32_t b; /* bit buffer */
+ register unsigned k; /* number of bits in bit buffer */
+
+
+@@ -622,7 +643,7 @@ STATIC int INIT inflate_codes(
+ DUMPBITS(t->b)
+ if (e == 16) /* then it's a literal */
+ {
+- slide[w++] = (uch)t->v.n;
++ slide[w++] = (uint8_t)t->v.n;
+ Tracevv((stderr, "%c", slide[w-1]));
+ if (w == WSIZE)
+ {
+@@ -659,11 +680,25 @@ STATIC int INIT inflate_codes(
+
+ /* do the copy */
+ do {
+- n -= (e = (e = WSIZE - ((d &= WSIZE-1) > w ? d : w)) > n ? n : e);
++#ifdef NEW_CODE
++ if (flush_cb) {
++#endif
++ /* Sliding window emulated using circular buffer:
++ * manage wrap-around */
++ e = WSIZE - ((d &= WSIZE-1) > w ? d : w);
++ if (e > n)
++ e = n;
++#ifdef NEW_CODE
++ } else {
++ e = n;
++ }
++#endif
++ n -= e;
++
+ #if !defined(NOMEMCPY) && !defined(DEBUG)
+ if (w - d >= e) /* (this test assumes unsigned comparison) */
+ {
+- memcpy(slide + w, slide + d, e);
++ memcpy(slide + w, slide + d, e);
+ w += e;
+ d += e;
+ }
+@@ -673,9 +708,8 @@ STATIC int INIT inflate_codes(
+ slide[w++] = slide[d++];
+ Tracevv((stderr, "%c", slide[w-1]));
+ } while (--e);
+- if (w == WSIZE)
+- {
+- flush_output(w);
++ if (w == WSIZE) {
++ flush_output(w);
+ w = 0;
+ }
+ } while (n);
+@@ -702,7 +736,7 @@ STATIC int INIT inflate_stored(void)
+ {
+ unsigned n; /* number of bytes in block */
+ unsigned w; /* current window position */
+- register ulg b; /* bit buffer */
++ register uint32_t b; /* bit buffer */
+ register unsigned k; /* number of bits in bit buffer */
+
+ DEBG("<stor");
+@@ -732,7 +766,7 @@ DEBG("<stor");
+ while (n--)
+ {
+ NEEDBITS(8)
+- slide[w++] = (uch)b;
++ slide[w++] = (uint8_t)b;
+ if (w == WSIZE)
+ {
+ flush_output(w);
+@@ -838,7 +872,7 @@ STATIC int noinline INIT inflate_dynamic
+ unsigned nl; /* number of literal/length codes */
+ unsigned nd; /* number of distance codes */
+ unsigned *ll; /* literal/length and distance code lengths */
+- register ulg b; /* bit buffer */
++ register uint32_t b; /* bit buffer */
+ register unsigned k; /* number of bits in bit buffer */
+ int ret;
+
+@@ -1033,7 +1067,7 @@ STATIC int INIT inflate_block(
+ /* decompress an inflated block */
+ {
+ unsigned t; /* block type */
+- register ulg b; /* bit buffer */
++ register uint32_t b; /* bit buffer */
+ register unsigned k; /* number of bits in bit buffer */
+
+ DEBG("<blk");
+@@ -1130,8 +1164,8 @@ STATIC int INIT inflate(void)
+ *
+ **********************************************************************/
+
+-static ulg crc_32_tab[256];
+-static ulg crc; /* initialized in makecrc() so it'll reside in bss */
++static uint32_t crc_32_tab[256];
++static uint32_t crc; /* initialized in makecrc() so it'll reside in bss */
+ #define CRC_VALUE (crc ^ 0xffffffffUL)
+
+ /*
+@@ -1172,7 +1206,7 @@ makecrc(void)
+ }
+
+ /* this is initialized here so this code could reside in ROM */
+- crc = (ulg)0xffffffffUL; /* shift register contents */
++ crc = (uint32_t)0xffffffffUL; /* shift register contents */
+ }
+
+ /* gzip flag byte */
+@@ -1184,18 +1218,89 @@ makecrc(void)
+ #define ENCRYPTED 0x20 /* bit 5 set: file is encrypted */
+ #define RESERVED 0xC0 /* bit 6,7: reserved */
+
++#ifdef NEW_CODE
++/* ===========================================================================
++ * Write the output window window[0..outcnt-1] and update crc and bytes_out.
++ * (Used for the decompressed data only.)
++ */
++static void INIT flush_window(void)
++{
++ uint32_t c = crc; /* temporary variable */
++ unsigned n;
++ uint8_t *in, ch;
++
++ in = window;
++ for (n = 0; n < outcnt; n++) {
++ ch = *in++;
++ c = crc_32_tab[((int)c ^ ch) & 0xff] ^ (c >> 8);
++ }
++ crc = c;
++ bytes_out += (uint32_t)outcnt;
++ if (flush_cb != NULL)
++ flush_cb(window, outcnt); /* TODO: handle unzip_error */
++ else
++ window += outcnt;
++ outcnt = 0;
++}
++
++static int empty_fill(void *buf, unsigned int len)
++{
++ return 0;
++}
++#endif
++
++
+ /*
+ * Do the uncompression!
+ */
+-static int INIT gunzip(void)
++STATIC int INIT gunzip(
++#ifdef NEW_CODE
++ unsigned char *buf, int len,
++ int(*fill)(void*, unsigned int),
++ int(*flush)(void*, unsigned int),
++ unsigned char *output,
++ int *posp,
++ void(*error_fn)(char *x)
++#else
++ void
++#endif
++ )
+ {
+- uch flags;
++ uint8_t flags;
+ unsigned char magic[2]; /* magic header */
+ char method;
+- ulg orig_crc = 0; /* original crc */
+- ulg orig_len = 0; /* original uncompressed length */
++ uint32_t orig_crc = 0; /* original crc */
++ uint32_t orig_len = 0; /* original uncompressed length */
+ int res;
+
++#ifdef NEW_CODE
++ set_error_fn(error_fn);
++ if (fill == NULL)
++ fill_cb = empty_fill;
++ else
++ fill_cb = fill;
++ if (output)
++ window = output;
++ else {
++ window = malloc(0x8000);
++ if (!window)
++ panic("can't allocate buffers");
++ flush_cb = flush;
++ }
++
++ insize = len;
++ if (buf)
++ inbuf = buf;
++ else
++ inbuf = malloc(INBUFSIZ);
++#endif
++
++ inptr = 0;
++ outcnt = 0; /* bytes in output buffer */
++ bytes_out = 0;
++ crc = (uint32_t)0xffffffffL; /* shift register contents */
++ makecrc();
++
+ magic[0] = NEXTBYTE();
+ magic[1] = NEXTBYTE();
+ method = NEXTBYTE();
+@@ -1212,7 +1317,7 @@ static int INIT gunzip(void)
+ return -1;
+ }
+
+- flags = (uch)get_byte();
++ flags = (uint8_t)get_byte();
+ if ((flags & ENCRYPTED) != 0) {
+ error("Input is encrypted");
+ return -1;
+@@ -1277,15 +1382,15 @@ static int INIT gunzip(void)
+ /* crc32 (see algorithm.doc)
+ * uncompressed input size modulo 2^32
+ */
+- orig_crc = (ulg) NEXTBYTE();
+- orig_crc |= (ulg) NEXTBYTE() << 8;
+- orig_crc |= (ulg) NEXTBYTE() << 16;
+- orig_crc |= (ulg) NEXTBYTE() << 24;
++ orig_crc = (uint32_t) NEXTBYTE();
++ orig_crc |= (uint32_t) NEXTBYTE() << 8;
++ orig_crc |= (uint32_t) NEXTBYTE() << 16;
++ orig_crc |= (uint32_t) NEXTBYTE() << 24;
+
+- orig_len = (ulg) NEXTBYTE();
+- orig_len |= (ulg) NEXTBYTE() << 8;
+- orig_len |= (ulg) NEXTBYTE() << 16;
+- orig_len |= (ulg) NEXTBYTE() << 24;
++ orig_len = (uint32_t) NEXTBYTE();
++ orig_len |= (uint32_t) NEXTBYTE() << 8;
++ orig_len |= (uint32_t) NEXTBYTE() << 16;
++ orig_len |= (uint32_t) NEXTBYTE() << 24;
+
+ /* Validate decompression */
+ if (orig_crc != CRC_VALUE) {
+@@ -1296,11 +1401,22 @@ static int INIT gunzip(void)
+ error("length error");
+ return -1;
+ }
++#ifdef NEW_CODE
++ if (!output)
++ free(window);
++ if (posp)
++ *posp = inptr;
++#endif
+ return 0;
+
+ underrun: /* NEXTBYTE() goto's here if needed */
++ free(window);
++#ifdef NEW_CODE
++ if (!buf)
++ free(inbuf);
++#endif
+ error("out of input data");
+ return -1;
+ }
+
+-
++#define decompress gunzip
+diff -purN linux-2.6.27.6/lib/Makefile linux-2.6.27.6udpcast/lib/Makefile
+--- linux-2.6.27.6/lib/Makefile 2008-11-13 18:56:21.000000000 +0100
++++ linux-2.6.27.6udpcast/lib/Makefile 2008-11-16 23:07:34.000000000 +0100
+@@ -11,7 +11,8 @@ lib-y := ctype.o string.o vsprintf.o cmd
+ rbtree.o radix-tree.o dump_stack.o \
+ idr.o int_sqrt.o extable.o prio_tree.o \
+ sha1.o irq_regs.o reciprocal_div.o argv_split.o \
+- proportions.o prio_heap.o ratelimit.o show_mem.o
++ proportions.o prio_heap.o ratelimit.o show_mem.o \
++ inflate.o decompress_bunzip2.o decompress_unlzma.o
+
+ lib-$(CONFIG_MMU) += ioremap.o
+ lib-$(CONFIG_SMP) += cpumask.o
+diff -purN linux-2.6.27.6/scripts/bin_size linux-2.6.27.6udpcast/scripts/bin_size
+--- linux-2.6.27.6/scripts/bin_size 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.27.6udpcast/scripts/bin_size 2008-11-16 23:43:34.000000000 +0100
+@@ -0,0 +1,10 @@
++#!/bin/sh
++
++if [ $# = 0 ] ; then
++ echo Usage: $0 file
++fi
++
++size_dec=`stat -c "%s" $1`
++size_hex_echo_string=`printf "%08x" $size_dec |
++ sed 's/\(..\)\(..\)\(..\)\(..\)/\\\\x\4\\\\x\3\\\\x\2\\\\x\1/g'`
++/bin/echo -ne $size_hex_echo_string
+diff -purN linux-2.6.27.6/scripts/Makefile.lib linux-2.6.27.6udpcast/scripts/Makefile.lib
+--- linux-2.6.27.6/scripts/Makefile.lib 2008-11-13 18:56:21.000000000 +0100
++++ linux-2.6.27.6udpcast/scripts/Makefile.lib 2008-11-16 23:02:55.000000000 +0100
+@@ -174,3 +174,17 @@ quiet_cmd_gzip = GZIP $@
+ cmd_gzip = gzip -f -9 < $< > $@
+
+
++# Bzip2
++# ---------------------------------------------------------------------------
++
++# Bzip2 does not include size in file... so we have to fake that
++size_append=$(CONFIG_SHELL) $(srctree)/scripts/bin_size
++
++quiet_cmd_bzip2 = BZIP2 $@
++cmd_bzip2 = (bzip2 -9 < $< ; $(size_append) $<) > $@ || (rm -f $@ ; false)
++
++# Lzma
++# ---------------------------------------------------------------------------
++
++quiet_cmd_lzma = LZMA $@
++cmd_lzma = (lzma e $< $@; $(size_append) $<) > $@ || (rm -f $@ ; false)
projects / openwrt / staging / kaloz.git / commitdiff