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openwrt/target/linux/generic-2.6/patches-2.6.31/960-arm_lzma_loader.patch
Mirko Vogt 6e2a58ac3b add generic patchset levelled up to 2.6.31-rc6 
SVN-Revision: 17351
2009-08-22 12:46:12 +00:00

711 lines
17 KiB
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--- a/arch/arm/boot/compressed/Makefile
+++ b/arch/arm/boot/compressed/Makefile
@@ -63,7 +63,7 @@ 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)
@@ -99,10 +99,10 @@ $(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
@@ -185,36 +185,10 @@ 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
@@ -233,24 +207,21 @@ 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
@@ -258,50 +229,10 @@ 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)
{
@@ -316,20 +247,16 @@ 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;
}
@@ -339,11 +266,8 @@ 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
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