LXR uboot/lib/lzma/LzmaTools.c

   1// SPDX-License-Identifier: GPL-2.0+
   2/*
   3 * Usefuls routines based on the LzmaTest.c file from LZMA SDK 4.65
   4 *
   5 * Copyright (C) 2007-2009 Industrie Dial Face S.p.A.
   6 * Luigi 'Comio' Mantellini (luigi.mantellini@idf-hit.com)
   7 *
   8 * Copyright (C) 1999-2005 Igor Pavlov
   9 */
  10
  11/*
  12 * LZMA_Alone stream format:
  13 *
  14 * uchar   Properties[5]
  15 * uint64  Uncompressed size
  16 * uchar   data[*]
  17 *
  18 */
  19
  20#include <config.h>
  21#include <common.h>
  22#include <log.h>
  23#include <watchdog.h>
  24
  25#ifdef CONFIG_LZMA
  26
  27#define LZMA_PROPERTIES_OFFSET 0
  28#define LZMA_SIZE_OFFSET       LZMA_PROPS_SIZE
  29#define LZMA_DATA_OFFSET       LZMA_SIZE_OFFSET+sizeof(uint64_t)
  30
  31#include "LzmaTools.h"
  32#include "LzmaDec.h"
  33
  34#include <linux/string.h>
  35#include <malloc.h>
  36
  37static void *SzAlloc(void *p, size_t size) { return malloc(size); }
  38static void SzFree(void *p, void *address) { free(address); }
  39
  40int lzmaBuffToBuffDecompress (unsigned char *outStream, SizeT *uncompressedSize,
  41                  unsigned char *inStream,  SizeT  length)
  42{
  43    int res = SZ_ERROR_DATA;
  44    int i;
  45    ISzAlloc g_Alloc;
  46
  47    SizeT outSizeFull = 0xFFFFFFFF; /* 4GBytes limit */
  48    SizeT outProcessed;
  49    SizeT outSize;
  50    SizeT outSizeHigh;
  51    ELzmaStatus state;
  52    SizeT compressedSize = (SizeT)(length - LZMA_PROPS_SIZE);
  53
  54    debug ("LZMA: Image address............... 0x%p\n", inStream);
  55    debug ("LZMA: Properties address.......... 0x%p\n", inStream + LZMA_PROPERTIES_OFFSET);
  56    debug ("LZMA: Uncompressed size address... 0x%p\n", inStream + LZMA_SIZE_OFFSET);
  57    debug ("LZMA: Compressed data address..... 0x%p\n", inStream + LZMA_DATA_OFFSET);
  58    debug ("LZMA: Destination address......... 0x%p\n", outStream);
  59
  60    memset(&state, 0, sizeof(state));
  61
  62    outSize = 0;
  63    outSizeHigh = 0;
  64    /* Read the uncompressed size */
  65    for (i = 0; i < 8; i++) {
  66        unsigned char b = inStream[LZMA_SIZE_OFFSET + i];
  67            if (i < 4) {
  68                outSize     += (UInt32)(b) << (i * 8);
  69        } else {
  70                outSizeHigh += (UInt32)(b) << ((i - 4) * 8);
  71        }
  72    }
  73
  74    outSizeFull = (SizeT)outSize;
  75    if (sizeof(SizeT) >= 8) {
  76        /*
  77         * SizeT is a 64 bit uint => We can manage files larger than 4GB!
  78         *
  79         */
  80            outSizeFull |= (((SizeT)outSizeHigh << 16) << 16);
  81    } else if (outSizeHigh != 0 || (UInt32)(SizeT)outSize != outSize) {
  82        /*
  83         * SizeT is a 32 bit uint => We cannot manage files larger than
  84         * 4GB!  Assume however that all 0xf values is "unknown size" and
  85         * not actually a file of 2^64 bits.
  86         *
  87         */
  88        if (outSizeHigh != (SizeT)-1 || outSize != (SizeT)-1) {
  89            debug ("LZMA: 64bit support not enabled.\n");
  90            return SZ_ERROR_DATA;
  91        }
  92    }
  93
  94    debug("LZMA: Uncompresed size............ 0x%zx\n", outSizeFull);
  95    debug("LZMA: Compresed size.............. 0x%zx\n", compressedSize);
  96
  97    g_Alloc.Alloc = SzAlloc;
  98    g_Alloc.Free = SzFree;
  99
 100    /* Short-circuit early if we know the buffer can't hold the results. */
 101    if (outSizeFull != (SizeT)-1 && *uncompressedSize < outSizeFull)
 102        return SZ_ERROR_OUTPUT_EOF;
 103
 104    /* Decompress */
 105    outProcessed = min(outSizeFull, *uncompressedSize);
 106
 107    WATCHDOG_RESET();
 108
 109    res = LzmaDecode(
 110        outStream, &outProcessed,
 111        inStream + LZMA_DATA_OFFSET, &compressedSize,
 112        inStream, LZMA_PROPS_SIZE, LZMA_FINISH_END, &state, &g_Alloc);
 113    *uncompressedSize = outProcessed;
 114
 115    debug("LZMA: Uncompressed ............... 0x%zx\n", outProcessed);
 116
 117    if (res != SZ_OK)  {
 118        return res;
 119    }
 120
 121    return res;
 122}
 123
 124#endif
 125