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-rw-r--r--target/linux/generic-2.6/patches/600-x86_lzma.patch405
1 files changed, 184 insertions, 221 deletions
diff --git a/target/linux/generic-2.6/patches/600-x86_lzma.patch b/target/linux/generic-2.6/patches/600-x86_lzma.patch
index 23191bc4f..168576e02 100644
--- a/target/linux/generic-2.6/patches/600-x86_lzma.patch
+++ b/target/linux/generic-2.6/patches/600-x86_lzma.patch
@@ -695,47 +695,136 @@ diff -Nur linux-2.6.21.1/arch/i386/boot/compressed/LzmaDecode.h linux-2.6.21.1-o
diff -Nur linux-2.6.21.1/arch/i386/boot/compressed/lzma_misc.c linux-2.6.21.1-owrt/arch/i386/boot/compressed/lzma_misc.c
--- linux-2.6.21.1/arch/i386/boot/compressed/lzma_misc.c 1970-01-01 01:00:00.000000000 +0100
+++ linux-2.6.21.1-owrt/arch/i386/boot/compressed/lzma_misc.c 2007-05-14 11:55:38.000000000 +0200
-@@ -0,0 +1,412 @@
+@@ -0,0 +1,374 @@
+/*
+ * lzma_misc.c
+ *
++ * malloc by Hannu Savolainen 1993 and Matthias Urlichs 1994
++ * puts by Nick Holloway 1993, better puts by Martin Mares 1995
++ * High loaded stuff by Hans Lermen & Werner Almesberger, Feb. 1996
++ *
+ * Decompress LZMA compressed vmlinuz
+ * Version 0.9 Copyright (c) Ming-Ching Tiew mctiew@yahoo.com
+ * Program adapted from misc.c for 2.6 kernel
-+ * Date: 3 June 2005
-+ * Source released under GPL
++ * Forward ported to latest 2.6 version of misc.c by
++ * Felix Fietkau <nbd@openwrt.org>
+ */
+
++#undef CONFIG_PARAVIRT
+#include <linux/linkage.h>
+#include <linux/vmalloc.h>
-+#include <linux/tty.h>
+#include <linux/screen_info.h>
+#include <asm/io.h>
++#include <asm/page.h>
++#include <asm/boot.h>
+
-+#define OF(args) args
-+#define STATIC static
-+
-+#undef memset
-+#undef memcpy
++/* WARNING!!
++ * This code is compiled with -fPIC and it is relocated dynamically
++ * at run time, but no relocation processing is performed.
++ * This means that it is not safe to place pointers in static structures.
++ */
+
+/*
-+ * Why do we do this? Don't ask me..
++ * Getting to provable safe in place decompression is hard.
++ * Worst case behaviours need to be analized.
++ * Background information:
++ *
++ * The file layout is:
++ * magic[2]
++ * method[1]
++ * flags[1]
++ * timestamp[4]
++ * extraflags[1]
++ * os[1]
++ * compressed data blocks[N]
++ * crc[4] orig_len[4]
++ *
++ * resulting in 18 bytes of non compressed data overhead.
++ *
++ * Files divided into blocks
++ * 1 bit (last block flag)
++ * 2 bits (block type)
++ *
++ * 1 block occurs every 32K -1 bytes or when there 50% compression has been achieved.
++ * The smallest block type encoding is always used.
++ *
++ * stored:
++ * 32 bits length in bytes.
++ *
++ * fixed:
++ * magic fixed tree.
++ * symbols.
++ *
++ * dynamic:
++ * dynamic tree encoding.
++ * symbols.
++ *
++ *
++ * The buffer for decompression in place is the length of the
++ * uncompressed data, plus a small amount extra to keep the algorithm safe.
++ * The compressed data is placed at the end of the buffer. The output
++ * pointer is placed at the start of the buffer and the input pointer
++ * is placed where the compressed data starts. Problems will occur
++ * when the output pointer overruns the input pointer.
++ *
++ * The output pointer can only overrun the input pointer if the input
++ * pointer is moving faster than the output pointer. A condition only
++ * triggered by data whose compressed form is larger than the uncompressed
++ * form.
++ *
++ * The worst case at the block level is a growth of the compressed data
++ * of 5 bytes per 32767 bytes.
++ *
++ * The worst case internal to a compressed block is very hard to figure.
++ * The worst case can at least be boundined by having one bit that represents
++ * 32764 bytes and then all of the rest of the bytes representing the very
++ * very last byte.
++ *
++ * All of which is enough to compute an amount of extra data that is required
++ * to be safe. To avoid problems at the block level allocating 5 extra bytes
++ * per 32767 bytes of data is sufficient. To avoind problems internal to a block
++ * adding an extra 32767 bytes (the worst case uncompressed block size) is
++ * sufficient, to ensure that in the worst case the decompressed data for
++ * block will stop the byte before the compressed data for a block begins.
++ * To avoid problems with the compressed data's meta information an extra 18
++ * bytes are needed. Leading to the formula:
++ *
++ * extra_bytes = (uncompressed_size >> 12) + 32768 + 18 + decompressor_size.
++ *
++ * Adding 8 bytes per 32K is a bit excessive but much easier to calculate.
++ * Adding 32768 instead of 32767 just makes for round numbers.
++ * Adding the decompressor_size is necessary as it musht live after all
++ * of the data as well. Last I measured the decompressor is about 14K.
++ * 10K of actuall data and 4K of bss.
+ *
-+ * Incomprehensible are the ways of bootloaders.
+ */
-+static void* memcpy(void *, __const void *, size_t);
++
++/*
++ * gzip declarations
++ */
++
++#define OF(args) args
++#define STATIC static
++
++#undef memcpy
+
+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 */
++#define WSIZE 0x80000000 /* 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 I report
++ * a 2G windows size, as that should
++ * always be larger than our output buffer.
++ */
+
-+static uch *inbuf; /* input buffer */
++static uch *inbuf; /* input buffer */
++static uch *window; /* Sliding window buffer, (and final output buffer) */
+
-+static unsigned insize = 0; /* valid bytes in inbuf */
-+static unsigned inptr = 0; /* index of next byte to be processed in inbuf */
++static unsigned insize; /* valid bytes in inbuf */
++static unsigned inptr; /* index of next byte to be processed in inbuf */
+
+#define get_byte() (inptr < insize ? inbuf[inptr++] : fill_inbuf())
+
@@ -757,7 +846,6 @@ diff -Nur linux-2.6.21.1/arch/i386/boot/compressed/lzma_misc.c linux-2.6.21.1-ow
+#endif
+
+static int fill_inbuf(void);
-+static void error(char *m);
+
+/*
+ * This is set up by the setup-routine at boot-time
@@ -770,30 +858,23 @@ diff -Nur linux-2.6.21.1/arch/i386/boot/compressed/lzma_misc.c linux-2.6.21.1-ow
+#endif
+#define RM_SCREEN_INFO (*(struct screen_info *)(real_mode+0))
+
-+extern char input_data[];
++extern unsigned char input_data[];
+extern int input_len;
+
-+static long bytes_out = 0;
-+static uch *output_data;
++static void error(char *x);
++static void *memcpy(void *dest, const void *src, unsigned n);
+
+static void putstr(const char *);
+
-+extern int _end;
-+static long free_mem_ptr = (long)&_end;
-+static long free_mem_end_ptr;
-+
-+#define INPLACE_MOVE_ROUTINE 0x1000
-+#define LOW_BUFFER_START 0x2000
-+#define LOW_BUFFER_MAX 0x90000
-+#define HEAP_SIZE 0x3000
-+static unsigned int low_buffer_end, low_buffer_size;
-+static int high_loaded =0;
-+static uch *high_buffer_start /* = (uch *)(((ulg)&_end) + HEAP_SIZE)*/;
-+
+static char *vidmem = (char *)0xb8000;
+static int vidport;
+static int lines, cols;
+
++#ifdef CONFIG_X86_NUMAQ
++void *xquad_portio;
++#endif
++
++
+static void scroll(void)
+{
+ int i;
@@ -819,7 +900,7 @@ diff -Nur linux-2.6.21.1/arch/i386/boot/compressed/lzma_misc.c linux-2.6.21.1-ow
+ y--;
+ }
+ } else {
-+ vidmem [ ( x + cols * y ) * 2 ] = c;
++ vidmem [ ( x + cols * y ) * 2 ] = c;
+ if ( ++x >= cols ) {
+ x = 0;
+ if ( ++y >= lines ) {
@@ -840,14 +921,13 @@ diff -Nur linux-2.6.21.1/arch/i386/boot/compressed/lzma_misc.c linux-2.6.21.1-ow
+ outb_p(0xff & (pos >> 1), vidport+1);
+}
+
-+static void* memcpy(void* __dest, __const void* __src,
-+ size_t __n)
++static void* memcpy(void* dest, const void* src, unsigned n)
+{
+ int i;
-+ char *d = (char *)__dest, *s = (char *)__src;
++ char *d = (char *)dest, *s = (char *)src;
+
-+ for (i=0;i<__n;i++) d[i] = s[i];
-+ return __dest;
++ for (i=0;i<n;i++) d[i] = s[i];
++ return dest;
+}
+
+/* ===========================================================================
@@ -856,85 +936,10 @@ diff -Nur linux-2.6.21.1/arch/i386/boot/compressed/lzma_misc.c linux-2.6.21.1-ow
+ */
+static int fill_inbuf(void)
+{
-+ if (insize != 0) {
-+ error("ran out of input data");
-+ }
-+
-+ inbuf = input_data;
-+ insize = input_len;
-+ inptr = 1;
-+ return inbuf[0];
-+}
-+
-+static void error(char *x)
-+{
-+ putstr("\n\n");
-+ putstr(x);
-+ putstr("\n\n -- System halted");
-+
-+ while(1); /* Halt */
-+}
-+
-+#define STACK_SIZE (4096)
-+
-+long user_stack [STACK_SIZE];
-+
-+struct {
-+ long * a;
-+ short b;
-+ } stack_start = { & user_stack [STACK_SIZE] , __BOOT_DS };
-+
-+static void setup_normal_output_buffer(void)
-+{
-+#ifdef STANDARD_MEMORY_BIOS_CALL
-+ if (RM_EXT_MEM_K < 1024) error("Less than 2MB of memory");
-+#else
-+ if ((RM_ALT_MEM_K > RM_EXT_MEM_K ? RM_ALT_MEM_K : RM_EXT_MEM_K) < 1024) error("Less than 2MB of memory");
-+#endif
-+ output_data = (char *)0x100000; /* Points to 1M */
-+ free_mem_end_ptr = (long)real_mode;
++ error("ran out of input data");
++ return 0;
+}
+
-+struct moveparams {
-+ uch *low_buffer_start; int lcount;
-+ uch *high_buffer_start; int hcount;
-+};
-+
-+static void setup_output_buffer_if_we_run_high(struct moveparams *mv)
-+{
-+ high_buffer_start = (uch *)(((ulg)&_end) + HEAP_SIZE);
-+#ifdef STANDARD_MEMORY_BIOS_CALL
-+ if (RM_EXT_MEM_K < (3*1024)) error("Less than 4MB of memory");
-+#else
-+ if ((RM_ALT_MEM_K > RM_EXT_MEM_K ? RM_ALT_MEM_K : RM_EXT_MEM_K) <
-+ (3*1024))
-+ error("Less than 4MB of memory");
-+#endif
-+ mv->low_buffer_start = output_data = (char *)LOW_BUFFER_START;
-+ low_buffer_end = ((unsigned int)real_mode > LOW_BUFFER_MAX
-+ ? LOW_BUFFER_MAX : (unsigned int)real_mode) & ~0xfff;
-+ low_buffer_size = low_buffer_end - LOW_BUFFER_START;
-+ high_loaded = 1;
-+ free_mem_end_ptr = (long)high_buffer_start;
-+ if ( (0x100000 + low_buffer_size) > ((ulg)high_buffer_start)) {
-+ high_buffer_start = (uch *)(0x100000 + low_buffer_size);
-+ mv->hcount = 0; /* say: we need not to move high_buffer */
-+ }
-+ else mv->hcount = -1;
-+ mv->high_buffer_start = high_buffer_start;
-+}
-+
-+static void close_output_buffer_if_we_run_high(struct moveparams *mv)
-+{
-+ if (bytes_out > low_buffer_size) {
-+ mv->lcount = low_buffer_size;
-+ if (mv->hcount)
-+ mv->hcount = bytes_out - low_buffer_size;
-+ } else {
-+ mv->lcount = bytes_out;
-+ mv->hcount = 0;
-+ }
-+}
+
+// When using LZMA in callback, the compressed length is not needed.
+// Otherwise you need a special version of lzma compression program
@@ -956,16 +961,16 @@ diff -Nur linux-2.6.21.1/arch/i386/boot/compressed/lzma_misc.c linux-2.6.21.1-ow
+{
+
+ unsigned int i; /* temp value */
-+ unsigned int lc; /* literal context bits */
-+ unsigned int lp; /* literal pos state bits */
-+ unsigned int pb; /* pos state bits */
++ unsigned int lc; /* literal context bits */
++ unsigned int lp; /* literal pos state bits */
++ unsigned int pb; /* pos state bits */
+ unsigned char* workspace;
+ unsigned int uncompressedSize = 0;
+ unsigned char* p;
-+
++
+#ifdef _LZMA_IN_CB
-+ ILzmaInCallback callback;
-+ callback.Read = read_byte;
++ ILzmaInCallback callback;
++ callback.Read = read_byte;
+#else
+ unsigned char* inputbuf;
+ unsigned int lzma_workspace_size;
@@ -975,95 +980,35 @@ diff -Nur linux-2.6.21.1/arch/i386/boot/compressed/lzma_misc.c linux-2.6.21.1-ow
+ /* lzma args */
+ i = get_byte();
+ lc = i % 9, i = i / 9;
-+ lp = i % 5, pb = i / 5;
-+
-+ /* skip dictionary size */
-+ for (i = 0; i < 4; i++)
-+ get_byte();
-+ // get uncompressedSize
-+ p= (char*)&uncompressedSize;
-+ for (i = 0; i < 4; i++)
-+ *p++ = get_byte();
-+
-+ //get compressedSize
++ lp = i % 5, pb = i / 5;
++
++ /* skip dictionary size */
++ for (i = 0; i < 4; i++)
++ get_byte();
++ // get uncompressedSize
++ p= (char*)&uncompressedSize;
++ for (i = 0; i < 4; i++)
++ *p++ = get_byte();
++
++ //get compressedSize
+#ifdef _LZMA_IN_CB
-+ for (i = 0; i < 4; i++)
-+ get_byte();
++ for (i = 0; i < 4; i++)
++ get_byte();
+#else
-+ p= (char*)&compressedSize;
-+ for (i = 0; i < 4; i++)
-+ *p++ = get_byte();
++ p= (char*)&compressedSize;
++ for (i = 0; i < 4; i++)
++ *p++ = get_byte();
+#endif
-+
-+#if 0
-+ if ( (lc == 5 ) && (lp == 0 ) && ( pb == 0 ))
-+ {
-+ putstr("got prop!\n");
-+ }
-+
-+#ifndef _LZMA_IN_CB
-+ if( compressedSize == 496722 )
-+ {
-+ putstr( "got the right sizes\n");
-+ }
-+ else if ( compressedSize > 496722 )
-+ {
-+ putstr( "greater !\n");
-+ }
-+ else if ( compressedSize < 496722 )
-+ putstr( "smaller!\n");
-+
-+#endif
-+ if ( uncompressedSize == 1187168 )
-+ {
-+ putstr( "got the right uncompressed size \n");
-+ }else if ( uncompressedSize > 1187168 )
-+ {
-+ putstr( "uncompressedSize greater!\n");
-+ }else
-+ putstr( "uncompressedSize smaller!|n");
-+#endif
-+
-+ // point it beyond uncompresedSize
-+ workspace = high_buffer_start + uncompressedSize;
-+ //
-+#ifndef _LZMA_IN_CB
-+ lzma_workspace_size = (LZMA_BASE_SIZE + (LZMA_LIT_SIZE << (lc + lp))) * sizeof(CProb);
-+ inputbuf = high_buffer_start + uncompressedSize + lzma_workspace_size;
-+ // read the compressed data
-+ for( i=0; i < compressedSize; i++)
-+ {
-+ if ( i % ( 1024 * 10 ) == 0 )
-+ putstr(".");
-+ *inputbuf++ = get_byte();
-+ }
-+#endif
-+
++
++ // point it beyond uncompresedSize
++ workspace = window + uncompressedSize;
++
+ /* decompress kernel */
-+#ifdef _LZMA_IN_CB
-+ if (LzmaDecode(workspace, ~0, lc, lp, pb,
-+ &callback,
-+#else
-+ if (LzmaDecode(workspace, lzma_workspace_size, lc, lp, pb,
-+ inputbuf - compressedSize, compressedSize,
-+#endif
-+ (unsigned char*)high_buffer_start, uncompressedSize, &i) == LZMA_RESULT_OK)
-+ {
-+ if ( i != uncompressedSize )
-+ error( "kernel corrupted!\n");
-+ //copy it back to low_buffer
-+ if( uncompressedSize > low_buffer_size )
-+ {
-+ memcpy((char*)LOW_BUFFER_START, high_buffer_start, low_buffer_size);
-+ memcpy(high_buffer_start, high_buffer_start+low_buffer_size,
-+ uncompressedSize-low_buffer_size);
-+ }
-+ else
-+ memcpy((char*)LOW_BUFFER_START, high_buffer_start, uncompressedSize );
-+ bytes_out = i;
++ if (LzmaDecode(workspace, ~0, lc, lp, pb, &callback,
++ (unsigned char*)window, uncompressedSize, &i) == LZMA_RESULT_OK)
+ return 0;
-+ }
-+ return 1;
++ else
++ return 1;
+}
+
+
@@ -1075,13 +1020,23 @@ diff -Nur linux-2.6.21.1/arch/i386/boot/compressed/lzma_misc.c linux-2.6.21.1-ow
+ *bufferSize = 1;
+ val = get_byte();
+ *buffer = &val;
-+ if ( i++ % ( 1024 * 50 ) == 0 )
-+ putstr(".");
++ if ( i++ % ( 1024 * 50 ) == 0 )
++ putstr(".");
+ return LZMA_RESULT_OK;
+}
+#endif
+
-+asmlinkage int decompress_kernel(struct moveparams *mv, void *rmode)
++static void error(char *x)
++{
++ putstr("\n\n");
++ putstr(x);
++ putstr("\n\n -- System halted");
++
++ while(1); /* Halt */
++}
++
++asmlinkage void decompress_kernel(void *rmode, unsigned long end,
++ uch *input_data, unsigned long input_len, uch *output)
+{
+ real_mode = rmode;
+
@@ -1096,22 +1051,29 @@ diff -Nur linux-2.6.21.1/arch/i386/boot/compressed/lzma_misc.c linux-2.6.21.1-ow
+ lines = RM_SCREEN_INFO.orig_video_lines;
+ cols = RM_SCREEN_INFO.orig_video_cols;
+
-+ if (free_mem_ptr < 0x100000) setup_normal_output_buffer();
-+ else setup_output_buffer_if_we_run_high(mv);
++ window = output;
++ inbuf = input_data; /* Input buffer */
++ insize = input_len;
++ inptr = 0;
++
++ if ((u32)output & (CONFIG_PHYSICAL_ALIGN -1))
++ error("Destination address not CONFIG_PHYSICAL_ALIGN aligned");
++ if (end > ((-__PAGE_OFFSET-(512 <<20)-1) & 0x7fffffff))
++ error("Destination address too large");
++#ifndef CONFIG_RELOCATABLE
++ if ((u32)output != LOAD_PHYSICAL_ADDR)
++ error("Wrong destination address");
++#endif
+
-+ putstr("LZMA vmlinuz: Ming-Ching Tiew <mctiew@yahoo.com> ...");
-+ if( lzma_unzip() != 0 )
-+ {
-+ error("inflate error\n");
-+ }
++ putstr("Uncompressing Linux... ");
++ lzma_unzip();
+ putstr("Ok, booting the kernel.\n");
-+ if (high_loaded) close_output_buffer_if_we_run_high(mv);
-+ return high_loaded;
++ return;
+}
diff -Nur linux-2.6.21.1/arch/i386/boot/compressed/Makefile linux-2.6.21.1-owrt/arch/i386/boot/compressed/Makefile
--- linux-2.6.21.1/arch/i386/boot/compressed/Makefile 2007-04-27 23:49:26.000000000 +0200
+++ linux-2.6.21.1-owrt/arch/i386/boot/compressed/Makefile 2007-05-14 12:01:25.000000000 +0200
-@@ -4,7 +4,7 @@
+@@ -4,15 +4,15 @@
# create a compressed vmlinux image from the original vmlinux
#
@@ -1120,8 +1082,9 @@ diff -Nur linux-2.6.21.1/arch/i386/boot/compressed/Makefile linux-2.6.21.1-owrt/
vmlinux.bin.all vmlinux.relocs
EXTRA_AFLAGS := -traditional
-@@ -12,7 +12,7 @@
- CFLAGS_misc.o += -fPIC
+ LDFLAGS_vmlinux := -T
+-CFLAGS_misc.o += -fPIC
++CFLAGS_lzma_misc.o += -fPIC
hostprogs-y := relocs
-$(obj)/vmlinux: $(src)/vmlinux.lds $(obj)/head.o $(obj)/misc.o $(obj)/piggy.o FORCE
generated by cgit v1.2.3 (git 2.25.1) at 2025-10-31 02:18:18 +0000