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3119 lines
88 KiB
Diff
3119 lines
88 KiB
Diff
--- a/arch/arm/boot/compressed/Makefile
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+++ b/arch/arm/boot/compressed/Makefile
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@@ -67,8 +67,15 @@ endif
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SEDFLAGS = s/TEXT_START/$(ZTEXTADDR)/;s/BSS_START/$(ZBSSADDR)/
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-targets := vmlinux vmlinux.lds piggy.gz piggy.o font.o font.c \
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- head.o misc.o $(OBJS)
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+suffix_$(CONFIG_KERNEL_GZIP) = gz
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+suffix_$(CONFIG_KERNEL_BZIP2) = bz2
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+suffix_$(CONFIG_KERNEL_LZMA) = lzma
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+
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+targets := vmlinux vmlinux.lds \
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+ piggy.gz piggy.gz.o \
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+ piggy.bz2 piggy.bz2.o \
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+ piggy.lzma piggy.lzma.o \
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+ font.o font.c head.o misc.o $(OBJS)
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ifeq ($(CONFIG_FUNCTION_TRACER),y)
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ORIG_CFLAGS := $(KBUILD_CFLAGS)
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@@ -95,7 +102,7 @@ LDFLAGS_vmlinux += -p --no-undefined -X
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# would otherwise mess up our GOT table
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CFLAGS_misc.o := -Dstatic=
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-$(obj)/vmlinux: $(obj)/vmlinux.lds $(obj)/$(HEAD) $(obj)/piggy.o \
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+$(obj)/vmlinux: $(obj)/vmlinux.lds $(obj)/$(HEAD) $(obj)/piggy.$(suffix_y).o \
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$(addprefix $(obj)/, $(OBJS)) FORCE
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$(call if_changed,ld)
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@:
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@@ -103,7 +110,17 @@ $(obj)/vmlinux: $(obj)/vmlinux.lds $(obj
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$(obj)/piggy.gz: $(obj)/../Image FORCE
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$(call if_changed,gzip)
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-$(obj)/piggy.o: $(obj)/piggy.gz FORCE
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+$(obj)/piggy.bz2: $(obj)/../Image FORCE
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+ $(call if_changed,bzip2)
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+
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+$(obj)/piggy.lzma: $(obj)/../Image FORCE
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+ $(call if_changed,lzma)
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+
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+$(obj)/piggy.gz.o: $(obj)/piggy.gz FORCE
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+
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+$(obj)/piggy.bz2.o: $(obj)/piggy.bz2 FORCE
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+
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+$(obj)/piggy.lzma.o: $(obj)/piggy.lzma FORCE
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CFLAGS_font.o := -Dstatic=
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--- a/arch/arm/boot/compressed/misc.c
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+++ b/arch/arm/boot/compressed/misc.c
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@@ -169,116 +169,34 @@ static inline __ptr_t memcpy(__ptr_t __d
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/*
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* gzip delarations
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*/
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-#define OF(args) args
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#define STATIC static
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-typedef unsigned char uch;
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-typedef unsigned short ush;
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typedef unsigned long ulg;
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-#define WSIZE 0x8000 /* Window size must be at least 32k, */
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- /* and a power of two */
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-
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-static uch *inbuf; /* input buffer */
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-static uch window[WSIZE]; /* Sliding window buffer */
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-
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-static unsigned insize; /* valid bytes in inbuf */
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-static unsigned inptr; /* index of next byte to be processed in inbuf */
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-static unsigned outcnt; /* bytes in output buffer */
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-
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-/* gzip flag byte */
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-#define ASCII_FLAG 0x01 /* bit 0 set: file probably ascii text */
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-#define CONTINUATION 0x02 /* bit 1 set: continuation of multi-part gzip file */
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-#define EXTRA_FIELD 0x04 /* bit 2 set: extra field present */
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-#define ORIG_NAME 0x08 /* bit 3 set: original file name present */
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-#define COMMENT 0x10 /* bit 4 set: file comment present */
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-#define ENCRYPTED 0x20 /* bit 5 set: file is encrypted */
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-#define RESERVED 0xC0 /* bit 6,7: reserved */
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-
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-#define get_byte() (inptr < insize ? inbuf[inptr++] : fill_inbuf())
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-
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-/* Diagnostic functions */
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-#ifdef DEBUG
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-# define Assert(cond,msg) {if(!(cond)) error(msg);}
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-# define Trace(x) fprintf x
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-# define Tracev(x) {if (verbose) fprintf x ;}
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-# define Tracevv(x) {if (verbose>1) fprintf x ;}
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-# define Tracec(c,x) {if (verbose && (c)) fprintf x ;}
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-# define Tracecv(c,x) {if (verbose>1 && (c)) fprintf x ;}
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-#else
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-# define Assert(cond,msg)
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-# define Trace(x)
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-# define Tracev(x)
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-# define Tracevv(x)
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-# define Tracec(c,x)
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-# define Tracecv(c,x)
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-#endif
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-
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-static int fill_inbuf(void);
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-static void flush_window(void);
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-static void error(char *m);
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-
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extern char input_data[];
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extern char input_data_end[];
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-static uch *output_data;
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-static ulg output_ptr;
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-static ulg bytes_out;
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-
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static void error(char *m);
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-static void putstr(const char *);
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-
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-extern int end;
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static ulg free_mem_ptr;
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static ulg free_mem_end_ptr;
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-#ifdef STANDALONE_DEBUG
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-#define NO_INFLATE_MALLOC
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-#endif
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-
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#define ARCH_HAS_DECOMP_WDOG
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+#define NEW_CODE
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+#ifdef CONFIG_KERNEL_GZIP
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#include "../../../../lib/inflate.c"
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+#endif
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-/* ===========================================================================
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- * Fill the input buffer. This is called only when the buffer is empty
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- * and at least one byte is really needed.
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- */
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-int fill_inbuf(void)
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-{
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- if (insize != 0)
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- error("ran out of input data");
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+#ifdef CONFIG_KERNEL_BZIP2
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+#include "../../../../lib/decompress_bunzip2.c"
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+#endif
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- inbuf = input_data;
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- insize = &input_data_end[0] - &input_data[0];
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+#ifdef CONFIG_KERNEL_LZMA
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+#include "../../../../lib/decompress_unlzma.c"
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+#endif
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- inptr = 1;
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- return inbuf[0];
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-}
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-/* ===========================================================================
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- * Write the output window window[0..outcnt-1] and update crc and bytes_out.
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- * (Used for the decompressed data only.)
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- */
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-void flush_window(void)
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-{
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- ulg c = crc;
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- unsigned n;
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- uch *in, *out, ch;
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-
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- in = window;
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- out = &output_data[output_ptr];
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- for (n = 0; n < outcnt; n++) {
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- ch = *out++ = *in++;
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- c = crc_32_tab[((int)c ^ ch) & 0xff] ^ (c >> 8);
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- }
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- crc = c;
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- bytes_out += (ulg)outcnt;
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- output_ptr += (ulg)outcnt;
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- outcnt = 0;
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- putstr(".");
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-}
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#ifndef arch_error
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#define arch_error(x)
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@@ -301,16 +219,24 @@ ulg
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decompress_kernel(ulg output_start, ulg free_mem_ptr_p, ulg free_mem_ptr_end_p,
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int arch_id)
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{
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- output_data = (uch *)output_start; /* Points to kernel start */
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- free_mem_ptr = free_mem_ptr_p;
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- free_mem_end_ptr = free_mem_ptr_end_p;
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+ ulg output_ptr;
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+ ulg *ptr;
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+ size_t input_len = input_data_end - input_data;
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+ size_t pos = 0;
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+
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__machine_arch_type = arch_id;
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arch_decomp_setup();
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- makecrc();
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- putstr("Uncompressing Linux...");
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- gunzip();
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+ ptr = (ulg *) (((long)input_data_end) - 4);
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+ output_ptr = output_start + *ptr;
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+
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+ free_mem_ptr = output_ptr;
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+ free_mem_end_ptr = output_ptr + 0x4000000;
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+
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+ putstr("Decompressing Linux...");
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+ decompress(input_data, input_len,
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+ NULL, NULL, (unsigned char *) output_start, &pos, error);
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putstr(" done, booting the kernel.\n");
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return output_ptr;
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}
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@@ -320,11 +246,8 @@ char output_buffer[1500*1024];
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int main()
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{
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- output_data = output_buffer;
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-
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- makecrc();
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putstr("Uncompressing Linux...");
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- gunzip();
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+ decompress(input_data, input_len, NULL, output_buffer, NULL);
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putstr("done.\n");
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return 0;
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}
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--- a/arch/x86/boot/compressed/Makefile
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+++ b/arch/x86/boot/compressed/Makefile
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@@ -4,7 +4,7 @@
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# create a compressed vmlinux image from the original vmlinux
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#
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-targets := vmlinux vmlinux.bin vmlinux.bin.gz head_$(BITS).o misc.o piggy.o
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+targets := vmlinux vmlinux.bin vmlinux.bin.gz vmlinux.bin.bz2 vmlinux.bin.lzma head_$(BITS).o misc.o piggy.o
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KBUILD_CFLAGS := -m$(BITS) -D__KERNEL__ $(LINUX_INCLUDE) -O2
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KBUILD_CFLAGS += -fno-strict-aliasing -fPIC
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@@ -47,9 +47,17 @@ ifeq ($(CONFIG_X86_32),y)
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ifdef CONFIG_RELOCATABLE
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$(obj)/vmlinux.bin.gz: $(obj)/vmlinux.bin.all FORCE
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$(call if_changed,gzip)
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+$(obj)/vmlinux.bin.bz2: $(obj)/vmlinux.bin.all FORCE
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+ $(call if_changed,bzip2)
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+$(obj)/vmlinux.bin.lzma: $(obj)/vmlinux.bin.all FORCE
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+ $(call if_changed,lzma)
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else
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$(obj)/vmlinux.bin.gz: $(obj)/vmlinux.bin FORCE
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$(call if_changed,gzip)
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+$(obj)/vmlinux.bin.bz2: $(obj)/vmlinux.bin FORCE
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+ $(call if_changed,bzip2)
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+$(obj)/vmlinux.bin.lzma: $(obj)/vmlinux.bin FORCE
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+ $(call if_changed,lzma)
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endif
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LDFLAGS_piggy.o := -r --format binary --oformat elf32-i386 -T
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@@ -60,5 +68,9 @@ $(obj)/vmlinux.bin.gz: $(obj)/vmlinux.bi
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LDFLAGS_piggy.o := -r --format binary --oformat elf64-x86-64 -T
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endif
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-$(obj)/piggy.o: $(obj)/vmlinux.scr $(obj)/vmlinux.bin.gz FORCE
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+suffix_$(CONFIG_KERNEL_GZIP) = gz
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+suffix_$(CONFIG_KERNEL_BZIP2) = bz2
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+suffix_$(CONFIG_KERNEL_LZMA) = lzma
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+
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+$(obj)/piggy.o: $(obj)/vmlinux.scr $(obj)/vmlinux.bin.$(suffix_y) FORCE
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$(call if_changed,ld)
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--- a/arch/x86/boot/compressed/misc.c
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+++ b/arch/x86/boot/compressed/misc.c
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@@ -116,71 +116,13 @@
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/*
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* gzip declarations
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*/
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-
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-#define OF(args) args
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#define STATIC static
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#undef memset
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#undef memcpy
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#define memzero(s, n) memset((s), 0, (n))
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-typedef unsigned char uch;
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-typedef unsigned short ush;
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-typedef unsigned long ulg;
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-
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-/*
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- * Window size must be at least 32k, and a power of two.
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- * We don't actually have a window just a huge output buffer,
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- * so we report a 2G window size, as that should always be
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- * larger than our output buffer:
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- */
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-#define WSIZE 0x80000000
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-/* Input buffer: */
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-static unsigned char *inbuf;
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-
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-/* Sliding window buffer (and final output buffer): */
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-static unsigned char *window;
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-
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-/* Valid bytes in inbuf: */
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-static unsigned insize;
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-
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-/* Index of next byte to be processed in inbuf: */
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-static unsigned inptr;
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-
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-/* Bytes in output buffer: */
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-static unsigned outcnt;
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-
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-/* gzip flag byte */
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-#define ASCII_FLAG 0x01 /* bit 0 set: file probably ASCII text */
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-#define CONTINUATION 0x02 /* bit 1 set: continuation of multi-part gz file */
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-#define EXTRA_FIELD 0x04 /* bit 2 set: extra field present */
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-#define ORIG_NAM 0x08 /* bit 3 set: original file name present */
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-#define COMMENT 0x10 /* bit 4 set: file comment present */
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-#define ENCRYPTED 0x20 /* bit 5 set: file is encrypted */
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-#define RESERVED 0xC0 /* bit 6, 7: reserved */
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-
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-#define get_byte() (inptr < insize ? inbuf[inptr++] : fill_inbuf())
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-
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-/* Diagnostic functions */
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-#ifdef DEBUG
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-# define Assert(cond, msg) do { if (!(cond)) error(msg); } while (0)
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-# define Trace(x) do { fprintf x; } while (0)
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-# define Tracev(x) do { if (verbose) fprintf x ; } while (0)
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-# define Tracevv(x) do { if (verbose > 1) fprintf x ; } while (0)
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-# define Tracec(c, x) do { if (verbose && (c)) fprintf x ; } while (0)
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-# define Tracecv(c, x) do { if (verbose > 1 && (c)) fprintf x ; } while (0)
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-#else
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-# define Assert(cond, msg)
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-# define Trace(x)
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-# define Tracev(x)
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-# define Tracevv(x)
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-# define Tracec(c, x)
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-# define Tracecv(c, x)
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-#endif
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-
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-static int fill_inbuf(void);
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-static void flush_window(void);
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static void error(char *m);
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/*
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@@ -189,11 +131,6 @@ static void error(char *m);
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static struct boot_params *real_mode; /* Pointer to real-mode data */
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static int quiet;
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-extern unsigned char input_data[];
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-extern int input_len;
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-
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-static long bytes_out;
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-
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static void *memset(void *s, int c, unsigned n);
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static void *memcpy(void *dest, const void *src, unsigned n);
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@@ -213,7 +150,19 @@ static char *vidmem;
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static int vidport;
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static int lines, cols;
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+#define NEW_CODE
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+
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+#ifdef CONFIG_KERNEL_GZIP
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#include "../../../../lib/inflate.c"
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+#endif
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+
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+#ifdef CONFIG_KERNEL_BZIP2
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+#include "../../../../lib/decompress_bunzip2.c"
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+#endif
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+
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+#ifdef CONFIG_KERNEL_LZMA
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+#include "../../../../lib/decompress_unlzma.c"
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+#endif
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static void scroll(void)
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{
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@@ -293,38 +242,6 @@ static void *memcpy(void *dest, const vo
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return dest;
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}
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|
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-/* ===========================================================================
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- * Fill the input buffer. This is called only when the buffer is empty
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- * and at least one byte is really needed.
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- */
|
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-static int fill_inbuf(void)
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-{
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- error("ran out of input data");
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- return 0;
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-}
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-
|
|
-/* ===========================================================================
|
|
- * 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)
|
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-{
|
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- /* With my window equal to my output buffer
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- * I only need to compute the crc here.
|
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- */
|
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- unsigned long c = crc; /* temporary variable */
|
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- unsigned n;
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- unsigned char *in, ch;
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-
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- in = window;
|
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- for (n = 0; n < outcnt; n++) {
|
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- ch = *in++;
|
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- c = crc_32_tab[((int)c ^ ch) & 0xff] ^ (c >> 8);
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- }
|
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- crc = c;
|
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- bytes_out += (unsigned long)outcnt;
|
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- outcnt = 0;
|
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-}
|
|
|
|
static void error(char *x)
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{
|
|
@@ -407,12 +324,8 @@ asmlinkage void decompress_kernel(void *
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lines = real_mode->screen_info.orig_video_lines;
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cols = real_mode->screen_info.orig_video_cols;
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- window = output; /* Output buffer (Normally at 1M) */
|
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free_mem_ptr = heap; /* Heap */
|
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free_mem_end_ptr = heap + BOOT_HEAP_SIZE;
|
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- inbuf = input_data; /* Input buffer */
|
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- insize = input_len;
|
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- inptr = 0;
|
|
|
|
#ifdef CONFIG_X86_64
|
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if ((unsigned long)output & (__KERNEL_ALIGN - 1))
|
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@@ -430,10 +343,9 @@ asmlinkage void decompress_kernel(void *
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#endif
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#endif
|
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|
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- makecrc();
|
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if (!quiet)
|
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putstr("\nDecompressing Linux... ");
|
|
- gunzip();
|
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+ decompress(input_data, input_len, NULL, NULL, output, NULL, error);
|
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parse_elf(output);
|
|
if (!quiet)
|
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putstr("done.\nBooting the kernel.\n");
|
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--- a/arch/x86/include/asm/boot.h
|
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+++ b/arch/x86/include/asm/boot.h
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@@ -15,11 +15,21 @@
|
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+ (CONFIG_PHYSICAL_ALIGN - 1)) \
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& ~(CONFIG_PHYSICAL_ALIGN - 1))
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|
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+#if (defined CONFIG_KERNEL_BZIP2)
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+#define BOOT_HEAP_SIZE 0x400000
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+#else
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+
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#ifdef CONFIG_X86_64
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#define BOOT_HEAP_SIZE 0x7000
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-#define BOOT_STACK_SIZE 0x4000
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#else
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#define BOOT_HEAP_SIZE 0x4000
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+#endif
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+
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+#endif
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+
|
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+#ifdef CONFIG_X86_64
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+#define BOOT_STACK_SIZE 0x4000
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+#else
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#define BOOT_STACK_SIZE 0x1000
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#endif
|
|
|
|
--- a/drivers/block/Kconfig
|
|
+++ b/drivers/block/Kconfig
|
|
@@ -358,6 +358,30 @@ 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"
|
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+ default n
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+ depends on BLK_DEV_INITRD=y
|
|
+ help
|
|
+ Support loading of a bzip2 encoded initial ramdisk or cpio buffer
|
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+ If unsure, say N.
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+
|
|
+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
|
|
--- /dev/null
|
|
+++ b/include/linux/decompress/bunzip2.h
|
|
@@ -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
|
|
--- /dev/null
|
|
+++ b/include/linux/decompress/generic.h
|
|
@@ -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
|
|
--- /dev/null
|
|
+++ b/include/linux/decompress/inflate.h
|
|
@@ -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
|
|
--- /dev/null
|
|
+++ b/include/linux/decompress/mm.h
|
|
@@ -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 */
|
|
--- /dev/null
|
|
+++ b/include/linux/decompress/unlzma.h
|
|
@@ -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
|
|
--- a/init/Kconfig
|
|
+++ b/init/Kconfig
|
|
@@ -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
|
|
--- a/init/do_mounts_rd.c
|
|
+++ b/init/do_mounts_rd.c
|
|
@@ -11,6 +11,12 @@
|
|
|
|
#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)
|
|
@@ -29,7 +35,7 @@ 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
|
|
@@ -46,7 +52,7 @@ 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;
|
|
@@ -74,6 +80,7 @@ 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 0
|
|
*/
|
|
@@ -81,9 +88,39 @@ 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 &&
|
|
@@ -156,6 +193,7 @@ 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
|
|
@@ -168,12 +206,12 @@ 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;
|
|
}
|
|
@@ -272,138 +310,48 @@ 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;
|
|
}
|
|
--- a/init/initramfs.c
|
|
+++ b/init/initramfs.c
|
|
@@ -389,11 +389,14 @@ 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') {
|
|
@@ -407,73 +410,14 @@ 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)
|
|
{
|
|
@@ -482,9 +426,10 @@ 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;
|
|
@@ -504,22 +449,38 @@ 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;
|
|
}
|
|
dir_utime();
|
|
- kfree(window);
|
|
kfree(name_buf);
|
|
kfree(symlink_buf);
|
|
kfree(header_buf);
|
|
--- a/lib/Makefile
|
|
+++ b/lib/Makefile
|
|
@@ -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
|
|
--- /dev/null
|
|
+++ b/lib/decompress_bunzip2.c
|
|
@@ -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
|
|
--- /dev/null
|
|
+++ b/lib/decompress_unlzma.c
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@@ -0,0 +1,647 @@
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+/* Lzma decompressor for Linux kernel. Shamelessly snarfed
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+ *from busybox 1.1.1
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+ *
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+ *Linux kernel adaptation
|
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+ *Copyright (C) 2006 Alain < alain@knaff.lu >
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+ *
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+ *Based on small lzma deflate implementation/Small range coder
|
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+ *implementation for lzma.
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+ *Copyright (C) 2006 Aurelien Jacobs < aurel@gnuage.org >
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+ *
|
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+ *Based on LzmaDecode.c from the LZMA SDK 4.22 (http://www.7-zip.org/)
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+ *Copyright (C) 1999-2005 Igor Pavlov
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+ *
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+ *Copyrights of the parts, see headers below.
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+ *
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+ *
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+ *This program is free software; you can redistribute it and/or
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+ *modify it under the terms of the GNU Lesser General Public
|
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+ *License as published by the Free Software Foundation; either
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+ *version 2.1 of the License, or (at your option) any later version.
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+ *
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+ *This program is distributed in the hope that it will be useful,
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+ *but WITHOUT ANY WARRANTY; without even the implied warranty of
|
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+ *MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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+ *Lesser General Public License for more details.
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+ *
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+ *You should have received a copy of the GNU Lesser General Public
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+ *License along with this library; if not, write to the Free Software
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+ *Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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+ */
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+
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+#ifndef STATIC
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+#include <linux/decompress/unlzma.h>
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+#endif /* STATIC */
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+
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+#include <linux/decompress/mm.h>
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+
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+#define MIN(a, b) (((a) < (b)) ? (a) : (b))
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+
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|
+static long long INIT read_int(unsigned char *ptr, int size)
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+{
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+ int i;
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+ long long ret = 0;
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+
|
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+ for (i = 0; i < size; i++)
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+ ret = (ret << 8) | ptr[size-i-1];
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+ return ret;
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+}
|
|
+
|
|
+#define ENDIAN_CONVERT(x) \
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+ x = (typeof(x))read_int((unsigned char *)&x, sizeof(x))
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+
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+
|
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+/* Small range coder implementation for lzma.
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+ *Copyright (C) 2006 Aurelien Jacobs < aurel@gnuage.org >
|
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+ *
|
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+ *Based on LzmaDecode.c from the LZMA SDK 4.22 (http://www.7-zip.org/)
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|
+ *Copyright (c) 1999-2005 Igor Pavlov
|
|
+ */
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+
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+#include <linux/compiler.h>
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+
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+#define LZMA_IOBUF_SIZE 0x10000
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+
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+struct rc {
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+ int (*fill)(void*, unsigned int);
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+ uint8_t *ptr;
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+ uint8_t *buffer;
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+ uint8_t *buffer_end;
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+ int buffer_size;
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+ uint32_t code;
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+ uint32_t range;
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+ uint32_t bound;
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|
+};
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+
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+
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+#define RC_TOP_BITS 24
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|
+#define RC_MOVE_BITS 5
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+#define RC_MODEL_TOTAL_BITS 11
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+
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+
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+/* Called twice: once at startup and once in rc_normalize() */
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+static void INIT rc_read(struct rc *rc)
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+{
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|
+ rc->buffer_size = rc->fill((char *)rc->buffer, LZMA_IOBUF_SIZE);
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+ if (rc->buffer_size <= 0)
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+ error("unexpected EOF");
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|
+ rc->ptr = rc->buffer;
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+ rc->buffer_end = rc->buffer + rc->buffer_size;
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+}
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|
+
|
|
+/* Called once */
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|
+static inline void INIT rc_init(struct rc *rc,
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|
+ int (*fill)(void*, unsigned int),
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|
+ char *buffer, int buffer_size)
|
|
+{
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|
+ rc->fill = fill;
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|
+ rc->buffer = (uint8_t *)buffer;
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|
+ rc->buffer_size = buffer_size;
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+ rc->buffer_end = rc->buffer + rc->buffer_size;
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|
+ rc->ptr = rc->buffer;
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+
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+ rc->code = 0;
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|
+ rc->range = 0xFFFFFFFF;
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|
+}
|
|
+
|
|
+static inline void INIT rc_init_code(struct rc *rc)
|
|
+{
|
|
+ int i;
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|
+
|
|
+ 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() */
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|
+static inline void INIT rc_free(struct rc *rc)
|
|
+{
|
|
+ free(rc->buffer);
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|
+}
|
|
+
|
|
+/* Called twice, but one callsite is in inline'd rc_is_bit_0_helper() */
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|
+static void INIT rc_do_normalize(struct rc *rc)
|
|
+{
|
|
+ if (rc->ptr >= rc->buffer_end)
|
|
+ rc_read(rc);
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|
+ rc->range <<= 8;
|
|
+ rc->code = (rc->code << 8) | *rc->ptr++;
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|
+}
|
|
+static inline void INIT rc_normalize(struct rc *rc)
|
|
+{
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|
+ if (rc->range < (1 << RC_TOP_BITS))
|
|
+ rc_do_normalize(rc);
|
|
+}
|
|
+
|
|
+/* Called 9 times */
|
|
+/* Why rc_is_bit_0_helper exists?
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|
+ *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);
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|
+ 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;
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|
+}
|
|
+
|
|
+/* Called ~10 times, but very small, thus inlined */
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|
+static inline void INIT rc_update_bit_0(struct rc *rc, uint16_t *p)
|
|
+{
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|
+ rc->range = rc->bound;
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|
+ *p += ((1 << RC_MODEL_TOTAL_BITS) - *p) >> RC_MOVE_BITS;
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|
+}
|
|
+static inline void rc_update_bit_1(struct rc *rc, uint16_t *p)
|
|
+{
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|
+ rc->range -= rc->bound;
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|
+ rc->code -= rc->bound;
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|
+ *p -= *p >> RC_MOVE_BITS;
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+}
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+
|
|
+/* Called 4 times in unlzma loop */
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|
+static int INIT rc_get_bit(struct rc *rc, uint16_t *p, int *symbol)
|
|
+{
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|
+ if (rc_is_bit_0(rc, p)) {
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|
+ rc_update_bit_0(rc, p);
|
|
+ *symbol *= 2;
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|
+ return 0;
|
|
+ } else {
|
|
+ rc_update_bit_1(rc, p);
|
|
+ *symbol = *symbol * 2 + 1;
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|
+ return 1;
|
|
+ }
|
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+}
|
|
+
|
|
+/* Called once */
|
|
+static inline int INIT rc_direct_bit(struct rc *rc)
|
|
+{
|
|
+ rc_normalize(rc);
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|
+ rc->range >>= 1;
|
|
+ if (rc->code >= rc->range) {
|
|
+ rc->code -= rc->range;
|
|
+ return 1;
|
|
+ }
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+/* Called twice */
|
|
+static inline void INIT
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|
+rc_bit_tree_decode(struct rc *rc, uint16_t *p, int num_levels, int *symbol)
|
|
+{
|
|
+ int i = num_levels;
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|
+
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|
+ *symbol = 1;
|
|
+ while (i--)
|
|
+ rc_get_bit(rc, p + *symbol, symbol);
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|
+ *symbol -= 1 << num_levels;
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|
+}
|
|
+
|
|
+
|
|
+/*
|
|
+ * 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)) ;
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|
+
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+
|
|
+#define LZMA_BASE_SIZE 1846
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|
+#define LZMA_LIT_SIZE 768
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|
+
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|
+#define LZMA_NUM_POS_BITS_MAX 4
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|
+
|
|
+#define LZMA_LEN_NUM_LOW_BITS 3
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|
+#define LZMA_LEN_NUM_MID_BITS 3
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|
+#define LZMA_LEN_NUM_HIGH_BITS 8
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|
+
|
|
+#define LZMA_LEN_CHOICE 0
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|
+#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))
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+
|
|
+#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 \
|
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+ + 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)
|
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+
|
|
+
|
|
+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
|
|
--- a/lib/inflate.c
|
|
+++ b/lib/inflate.c
|
|
@@ -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
|
|
--- a/scripts/Makefile.lib
|
|
+++ b/scripts/Makefile.lib
|
|
@@ -183,3 +183,17 @@ 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 = (/usr/bin/lzma -9 -c $< ; $(size_append) $<) >$@ || (rm -f $@ ; false)
|
|
--- /dev/null
|
|
+++ b/scripts/bin_size
|
|
@@ -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
|