add a new arm lzma kernel decompressor based on rewritten (and much more readable) unlzma code. backport to 2.6.28 as well. tested on ixp4xx and orion

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@16939 3c298f89-4303-0410-b956-a3cf2f4a3e73

1 files changed, 719 insertions, 0 deletions

diff --git a/target/linux/generic-2.6/patches-2.6.28/960-arm_lzma_loader.patch b/target/linux/generic-2.6/patches-2.6.28/960-arm_lzma_loader.patch
new file mode 100644
index 0000000000..986c282713
--- /dev/null
+++ b/target/linux/generic-2.6/patches-2.6.28/960-arm_lzma_loader.patch
@@ -0,0 +1,719 @@
+--- a/arch/arm/boot/compressed/Makefile
++++ b/arch/arm/boot/compressed/Makefile
+@@ -67,7 +67,7 @@ endif
+ 
+ SEDFLAGS	= s/TEXT_START/$(ZTEXTADDR)/;s/BSS_START/$(ZBSSADDR)/
+ 
+-targets       := vmlinux vmlinux.lds piggy.gz piggy.o font.o font.c \
++targets       := vmlinux vmlinux.lds piggy.lzma piggy.o font.o font.c \
+ 		 head.o misc.o $(OBJS)
+ 
+ ifeq ($(CONFIG_FUNCTION_TRACER),y)
+@@ -100,10 +100,10 @@ $(obj)/vmlinux: $(obj)/vmlinux.lds $(obj
+ 	$(call if_changed,ld)
+ 	@:
+ 
+-$(obj)/piggy.gz: $(obj)/../Image FORCE
+-	$(call if_changed,gzip)
++$(obj)/piggy.lzma: $(obj)/../Image FORCE
++	$(call if_changed,lzma)
+ 
+-$(obj)/piggy.o:  $(obj)/piggy.gz FORCE
++$(obj)/piggy.o:  $(obj)/piggy.lzma FORCE
+ 
+ CFLAGS_font.o := -Dstatic=
+ 
+--- a/arch/arm/boot/compressed/misc.c
++++ b/arch/arm/boot/compressed/misc.c
+@@ -166,36 +166,10 @@ static inline __ptr_t memcpy(__ptr_t __d
+ 	return __dest;
+ }
+ 
+-/*
+- * 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, */
++#define WSIZE 0x20000		/* Window size must be at least 128k, */
+ 				/* 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())
++static u8 window[WSIZE];	/* Sliding window buffer */
+ 
+ /* Diagnostic functions */
+ #ifdef DEBUG
+@@ -214,24 +188,21 @@ static unsigned outcnt;		/* bytes in out
+ #  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 unsigned long output_ptr;
++static unsigned long 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;
++static unsigned long free_mem_ptr;
++static unsigned long free_mem_end_ptr;
+ 
+ #ifdef STANDALONE_DEBUG
+ #define NO_INFLATE_MALLOC
+@@ -239,50 +210,10 @@ static ulg free_mem_end_ptr;
+ 
+ #define ARCH_HAS_DECOMP_WDOG
+ 
+-#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.
+- */
+-int fill_inbuf(void)
+-{
+-	if (insize != 0)
+-		error("ran out of input data");
+-
+-	inbuf = input_data;
+-	insize = &input_data_end[0] - &input_data[0];
+-
+-	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)
+ #endif
++#include "unlzma.c"
+ 
+ static void error(char *x)
+ {
+@@ -297,20 +228,16 @@ static void error(char *x)
+ 
+ #ifndef STANDALONE_DEBUG
+ 
+-ulg
+-decompress_kernel(ulg output_start, ulg free_mem_ptr_p, ulg free_mem_ptr_end_p,
++unsigned long
++decompress_kernel(unsigned long output_start, unsigned long free_mem_ptr_p, unsigned long 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;
+ 	__machine_arch_type	= arch_id;
+ 
+ 	arch_decomp_setup();
+ 
+-	makecrc();
+ 	putstr("Uncompressing Linux...");
+-	gunzip();
++	output_ptr += unlzma((u8 *) output_start, input_data, window);
+ 	putstr(" done, booting the kernel.\n");
+ 	return output_ptr;
+ }
+@@ -320,11 +247,8 @@ char output_buffer[1500*1024];
+ 
+ int main()
+ {
+-	output_data = output_buffer;
+-
+-	makecrc();
+ 	putstr("Uncompressing Linux...");
+-	gunzip();
++	unlzma((u8 *) output_buffer, input_data, window);
+ 	putstr("done.\n");
+ 	return 0;
+ }
+--- a/arch/arm/boot/compressed/piggy.S
++++ b/arch/arm/boot/compressed/piggy.S
+@@ -1,6 +1,6 @@
+ 	.section .piggydata,#alloc
+ 	.globl	input_data
+ input_data:
+-	.incbin	"arch/arm/boot/compressed/piggy.gz"
++	.incbin	"arch/arm/boot/compressed/piggy.lzma"
+ 	.globl	input_data_end
+ input_data_end:
+--- /dev/null
++++ b/arch/arm/boot/compressed/unlzma.c
+@@ -0,0 +1,429 @@
++/*
++ * Copyright (c) 2009  Felix Fietkau <nbd@openwrt.org>
++ *
++ * This program is free software; you can redistribute it and/or
++ * modify it under the terms of the GNU General Public License
++ * as published by the Free Software Foundation; either version 2,
++ * 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 General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
++ *
++ * uncompress.c
++ */
++
++#include <linux/types.h>
++#include <asm/byteorder.h>
++#include "unlzma.h"
++
++struct unlzma_ctx {
++	const u8 *next_in;
++	u8 *next_out;
++	u8 *outbuf;
++
++	/* reader state */
++	u32 code;
++	u32 range;
++	u32 bound;
++
++	/* writer state */
++	u8 previous_byte;
++	ssize_t pos;
++
++	/* cstate */
++	int state;
++	u32 rep0, rep1, rep2, rep3;
++
++	void *workspace;
++} ctx;
++
++static int inbs = 0;
++static inline u8
++rc_read(void)
++{
++#if 0
++	if (unlikely(++inbs > 16 * 1024)) {
++		putstr(".");
++		inbs = 0;
++	}
++#endif
++	return *(ctx.next_in++);
++}
++
++
++static inline void
++rc_get_code(void)
++{
++	ctx.code = (ctx.code << 8) | rc_read();
++}
++
++static inline void
++rc_normalize(void)
++{
++	if (ctx.range < (1 << RC_TOP_BITS)) {
++		ctx.range <<= 8;
++		rc_get_code();
++	}
++}
++
++static inline int
++rc_is_bit_0(u16 *p)
++{
++	rc_normalize();
++	ctx.bound = *p * (ctx.range >> RC_MODEL_TOTAL_BITS);
++	return ctx.code < ctx.bound;
++}
++
++static inline void
++rc_update_bit_0(u16 *p)
++{
++	ctx.range = ctx.bound;
++	*p += ((1 << RC_MODEL_TOTAL_BITS) - *p) >> RC_MOVE_BITS;
++}
++
++static inline void
++rc_update_bit_1(u16 *p)
++{
++	ctx.range -= ctx.bound;
++	ctx.code -= ctx.bound;
++	*p -= *p >> RC_MOVE_BITS;
++}
++
++static inline bool
++rc_get_bit(u16 *p, int *symbol)
++{
++	if (rc_is_bit_0(p)) {
++		rc_update_bit_0(p);
++		*symbol *= 2;
++		return 0;
++	} else {
++		rc_update_bit_1(p);
++		*symbol = *symbol * 2 + 1;
++		return 1;
++	}
++}
++
++static inline int
++rc_direct_bit(void)
++{
++	rc_normalize();
++	ctx.range >>= 1;
++	if (ctx.code >= ctx.range) {
++		ctx.code -= ctx.range;
++		return 1;
++	}
++	return 0;
++}
++
++static inline void
++rc_bit_tree_decode(u16 *p, int num_levels, int *symbol)
++{
++	int i = num_levels;
++
++	*symbol = 1;
++	while (i--)
++		rc_get_bit(p + *symbol, symbol);
++	*symbol -= 1 << num_levels;
++}
++
++static inline u8
++peek_old_byte(u32 offs)
++{
++	u32 pos = ctx.pos - offs;
++	return ctx.outbuf[pos];
++}
++
++static inline void
++write_byte(u8 byte)
++{
++	ctx.previous_byte = byte;
++	*(ctx.next_out++) = byte;
++	ctx.pos++;
++}
++
++
++static inline void
++copy_byte(u32 offs)
++{
++	write_byte(peek_old_byte(offs));
++}
++
++static inline void
++copy_bytes(u32 rep0, int len)
++{
++	do {
++		copy_byte(rep0);
++		len--;
++	} while (len != 0);
++}
++
++static inline void
++process_bit0(u16 *p, int pos_state, u16 *prob,
++             int lc, u32 literal_pos_mask)
++{
++	int mi = 1;
++	rc_update_bit_0(prob);
++	prob = (p + LZMA_LITERAL +
++		(LZMA_LIT_SIZE
++		 * (((ctx.pos & literal_pos_mask) << lc)
++		    + (ctx.previous_byte >> (8 - lc))))
++		);
++
++	if (ctx.state >= LZMA_NUM_LIT_STATES) {
++		int match_byte = peek_old_byte(ctx.rep0);
++		do {
++			u16 bit;
++			u16 *prob_lit;
++
++			match_byte <<= 1;
++			bit = match_byte & 0x100;
++			prob_lit = prob + 0x100 + bit + mi;
++			if (rc_get_bit(prob_lit, &mi) != !!bit)
++				break;
++		} while (mi < 0x100);
++	}
++	while (mi < 0x100) {
++		u16 *prob_lit = prob + mi;
++		rc_get_bit(prob_lit, &mi);
++	}
++	write_byte(mi);
++	if (ctx.state < 4)
++		ctx.state = 0;
++	else if (ctx.state < 10)
++		ctx.state -= 3;
++	else
++		ctx.state -= 6;
++}
++
++static inline void
++process_bit1(u16 *p, int pos_state, u16 *prob)
++{
++	int offset;
++	u16 *prob_len;
++	int num_bits;
++	int len;
++
++	rc_update_bit_1(prob);
++	prob = p + LZMA_IS_REP + ctx.state;
++	if (rc_is_bit_0(prob)) {
++		rc_update_bit_0(prob);
++		ctx.rep3 = ctx.rep2;
++		ctx.rep2 = ctx.rep1;
++		ctx.rep1 = ctx.rep0;
++		ctx.state = ctx.state < LZMA_NUM_LIT_STATES ? 0 : 3;
++		prob = p + LZMA_LEN_CODER;
++	} else {
++		rc_update_bit_1(prob);
++		prob = p + LZMA_IS_REP_G0 + ctx.state;
++		if (rc_is_bit_0(prob)) {
++			rc_update_bit_0(prob);
++			prob = (p + LZMA_IS_REP_0_LONG
++				+ (ctx.state <<
++				   LZMA_NUM_POS_BITS_MAX) +
++				pos_state);
++			if (rc_is_bit_0(prob)) {
++				rc_update_bit_0(prob);
++
++				ctx.state = ctx.state < LZMA_NUM_LIT_STATES ?
++					9 : 11;
++				copy_byte(ctx.rep0);
++				return;
++			} else {
++				rc_update_bit_1(prob);
++			}
++		} else {
++			u32 distance;
++
++			rc_update_bit_1(prob);
++			prob = p + LZMA_IS_REP_G1 + ctx.state;
++			if (rc_is_bit_0(prob)) {
++				rc_update_bit_0(prob);
++				distance = ctx.rep1;
++			} else {
++				rc_update_bit_1(prob);
++				prob = p + LZMA_IS_REP_G2 + ctx.state;
++				if (rc_is_bit_0(prob)) {
++					rc_update_bit_0(prob);
++					distance = ctx.rep2;
++				} else {
++					rc_update_bit_1(prob);
++					distance = ctx.rep3;
++					ctx.rep3 = ctx.rep2;
++				}
++				ctx.rep2 = ctx.rep1;
++			}
++			ctx.rep1 = ctx.rep0;
++			ctx.rep0 = distance;
++		}
++		ctx.state = ctx.state < LZMA_NUM_LIT_STATES ? 8 : 11;
++		prob = p + LZMA_REP_LEN_CODER;
++	}
++
++	prob_len = prob + LZMA_LEN_CHOICE;
++	if (rc_is_bit_0(prob_len)) {
++		rc_update_bit_0(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(prob_len);
++		prob_len = prob + LZMA_LEN_CHOICE_2;
++		if (rc_is_bit_0(prob_len)) {
++			rc_update_bit_0(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(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(prob_len, num_bits, &len);
++	len += offset;
++
++	if (ctx.state < 4) {
++		int pos_slot;
++
++		ctx.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(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;
++			ctx.rep0 = 2 | (pos_slot & 1);
++			if (pos_slot < LZMA_END_POS_MODEL_INDEX) {
++				ctx.rep0 <<= num_bits;
++				prob = p + LZMA_SPEC_POS +
++					ctx.rep0 - pos_slot - 1;
++			} else {
++				num_bits -= LZMA_NUM_ALIGN_BITS;
++				while (num_bits--)
++					ctx.rep0 = (ctx.rep0 << 1) |
++						rc_direct_bit();
++				prob = p + LZMA_ALIGN;
++				ctx.rep0 <<= LZMA_NUM_ALIGN_BITS;
++				num_bits = LZMA_NUM_ALIGN_BITS;
++			}
++			i = 1;
++			mi = 1;
++			while (num_bits--) {
++				if (rc_get_bit(prob + mi, &mi))
++					ctx.rep0 |= i;
++				i <<= 1;
++			}
++		} else
++			ctx.rep0 = pos_slot;
++		if (++(ctx.rep0) == 0)
++			return;
++	}
++
++	len += LZMA_MATCH_MIN_LEN;
++
++	copy_bytes(ctx.rep0, len);
++}
++
++
++static int
++do_unlzma(void)
++{
++	u8 hdr_buf[sizeof(struct lzma_header)];
++	struct lzma_header *header = (struct lzma_header *)hdr_buf;
++	u32 pos_state_mask;
++	u32 literal_pos_mask;
++	int lc, pb, lp;
++	int num_probs;
++	int i, mi;
++	u16 *p;
++
++	for (i = 0; i < sizeof(struct lzma_header); i++) {
++		hdr_buf[i] = rc_read();
++	}
++
++	ctx.pos = 0;
++	ctx.state = 0;
++	ctx.rep0 = ctx.rep1 = ctx.rep2 = ctx.rep3 = 1;
++
++	ctx.previous_byte = 0;
++	ctx.code = 0;
++	ctx.range = 0xFFFFFFFF;
++
++	if (header->pos >= (9 * 5 * 5))
++		return -1;
++
++	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;
++
++	p = (u16 *) ctx.workspace;
++	if (!p)
++		return -1;
++
++	num_probs = LZMA_LITERAL + (LZMA_LIT_SIZE << (lc + lp));
++	for (i = 0; i < num_probs; i++)
++		p[i] = (1 << RC_MODEL_TOTAL_BITS) >> 1;
++
++	for (i = 0; i < 5; i++)
++		rc_get_code();
++
++	while (1) {
++		int pos_state =	ctx.pos & pos_state_mask;
++		u16 *prob = p + LZMA_IS_MATCH +
++			(ctx.state << LZMA_NUM_POS_BITS_MAX) + pos_state;
++		if (rc_is_bit_0(prob))
++			process_bit0(p, pos_state, prob,
++				     lc, literal_pos_mask);
++		else {
++			process_bit1(p, pos_state, prob);
++			if (ctx.rep0 == 0)
++				break;
++		}
++	}
++
++	return ctx.pos;
++}
++
++
++static int unlzma(unsigned char *dest, const unsigned char *src, unsigned char *workspace)
++{
++	memset(&ctx, 0, sizeof(ctx));
++	ctx.outbuf = dest;
++	ctx.next_in = src;
++	ctx.next_out = dest;
++	ctx.workspace = workspace;
++
++	return do_unlzma();
++}
++
++
+--- /dev/null
++++ b/arch/arm/boot/compressed/unlzma.h
+@@ -0,0 +1,81 @@
++/* LZMA uncompresion module for pcomp
++ * Copyright (C) 2009  Felix Fietkau <nbd@openwrt.org>
++ *
++ * Based on:
++ *  Initial 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
++ *
++ * This program is free software; you can redistribute it and/or modify it
++ * under the terms of the GNU General Public License version 2 as published
++ * by the Free Software Foundation.
++ */
++#ifndef __UNLZMA_H
++#define __UNLZMA_H
++
++struct lzma_header {
++	__u8 pos;
++	__le32 dict_size;
++	__le64 uncompr_size;
++} __attribute__ ((packed));
++
++
++#define RC_TOP_BITS 24
++#define RC_MOVE_BITS 5
++#define RC_MODEL_TOTAL_BITS 11
++
++#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)
++
++#endif
+--- a/scripts/Makefile.lib
++++ b/scripts/Makefile.lib
+@@ -182,4 +182,6 @@ cmd_objcopy = $(OBJCOPY) $(OBJCOPYFLAGS)
+ quiet_cmd_gzip = GZIP    $@
+ cmd_gzip = gzip -f -9 < $< > $@
+ 
++quiet_cmd_lzma = LZMA    $@
++cmd_lzma = lzma e $< $@ -lc1 -lp2 -pb2 -eos
+