33c9db62d4
Currently, we have a copy of the LZMA SDK code, version 9.20, with small updates. The original import of the LZMA SDK included a script to update the library. This is no longer possible, due to important local changes, so remove it. We also remove a number of extra text files that should be unchanged from upstream, but provide no direct value to the project. Instead, have the help text for LZMA note that this comes from the LZMA SDK. Next, we move our code up to the current release, 25.01. There are a number of new header files, and some performance improvements made to the code, at the cost of between 2 to 3 kilobytes in binary size. As there is now a Kconfig option to disable this and retain similar speed to what we have currently, the default option is to make this trade-off. Our changes to the code around calling schedule() to avoid the watchdog being triggered are kept. We add __UBOOT__ guards in two places to prevent conflict with our own usage of these words on MIPS. Signed-off-by: Tom Rini <trini@konsulko.com>
124 lines
3.5 KiB
C
124 lines
3.5 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Usefuls routines based on the LzmaTest.c file from LZMA SDK 4.65
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*
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* Copyright (C) 2007-2009 Industrie Dial Face S.p.A.
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* Luigi 'Comio' Mantellini (luigi.mantellini@idf-hit.com)
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*
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* Copyright (C) 1999-2005 Igor Pavlov
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*/
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/*
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* LZMA_Alone stream format:
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*
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* uchar Properties[5]
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* uint64 Uncompressed size
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* uchar data[*]
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*
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*/
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#include <config.h>
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#include <log.h>
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#include <watchdog.h>
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#ifdef CONFIG_LZMA
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#define LZMA_PROPERTIES_OFFSET 0
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#define LZMA_SIZE_OFFSET LZMA_PROPS_SIZE
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#define LZMA_DATA_OFFSET LZMA_SIZE_OFFSET+sizeof(uint64_t)
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#include "LzmaTools.h"
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#include "LzmaDec.h"
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#include <linux/string.h>
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#include <malloc.h>
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static void *SzAlloc(ISzAllocPtr p, size_t size) { return malloc(size); }
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static void SzFree(ISzAllocPtr p, void *address) { free(address); }
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int lzmaBuffToBuffDecompress(unsigned char *outStream, SizeT *uncompressedSize,
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const unsigned char *inStream, SizeT length)
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{
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int res = SZ_ERROR_DATA;
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int i;
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ISzAlloc g_Alloc;
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SizeT outSizeFull = 0xFFFFFFFF; /* 4GBytes limit */
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SizeT outProcessed;
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SizeT outSize;
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SizeT outSizeHigh;
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ELzmaStatus state;
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SizeT compressedSize = (SizeT)(length - LZMA_PROPS_SIZE);
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debug ("LZMA: Image address............... 0x%p\n", inStream);
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debug ("LZMA: Properties address.......... 0x%p\n", inStream + LZMA_PROPERTIES_OFFSET);
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debug ("LZMA: Uncompressed size address... 0x%p\n", inStream + LZMA_SIZE_OFFSET);
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debug ("LZMA: Compressed data address..... 0x%p\n", inStream + LZMA_DATA_OFFSET);
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debug ("LZMA: Destination address......... 0x%p\n", outStream);
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memset(&state, 0, sizeof(state));
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outSize = 0;
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outSizeHigh = 0;
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/* Read the uncompressed size */
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for (i = 0; i < 8; i++) {
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unsigned char b = inStream[LZMA_SIZE_OFFSET + i];
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if (i < 4) {
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outSize += (UInt32)(b) << (i * 8);
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} else {
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outSizeHigh += (UInt32)(b) << ((i - 4) * 8);
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}
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}
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outSizeFull = (SizeT)outSize;
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if (sizeof(SizeT) >= 8) {
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/*
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* SizeT is a 64 bit uint => We can manage files larger than 4GB!
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*
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*/
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outSizeFull |= (((SizeT)outSizeHigh << 16) << 16);
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} else if (outSizeHigh != 0 || (UInt32)(SizeT)outSize != outSize) {
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/*
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* SizeT is a 32 bit uint => We cannot manage files larger than
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* 4GB! Assume however that all 0xf values is "unknown size" and
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* not actually a file of 2^64 bits.
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*
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*/
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if (outSizeHigh != (SizeT)-1 || outSize != (SizeT)-1) {
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debug ("LZMA: 64bit support not enabled.\n");
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return SZ_ERROR_DATA;
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}
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}
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debug("LZMA: Uncompresed size............ 0x%zx\n", outSizeFull);
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debug("LZMA: Compresed size.............. 0x%zx\n", compressedSize);
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g_Alloc.Alloc = SzAlloc;
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g_Alloc.Free = SzFree;
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/* Short-circuit early if we know the buffer can't hold the results. */
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if (outSizeFull != (SizeT)-1 && *uncompressedSize < outSizeFull)
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return SZ_ERROR_OUTPUT_EOF;
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/* Decompress */
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outProcessed = min(outSizeFull, *uncompressedSize);
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schedule();
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res = LzmaDecode(
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outStream, &outProcessed,
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inStream + LZMA_DATA_OFFSET, &compressedSize,
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inStream, LZMA_PROPS_SIZE, LZMA_FINISH_END, &state, &g_Alloc);
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*uncompressedSize = outProcessed;
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debug("LZMA: Uncompressed ............... 0x%zx\n", outProcessed);
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if (res != SZ_OK) {
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return res;
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}
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return res;
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}
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#endif
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