| /* |
| * coreboot interface to memory-saving variant of LZMA decoder |
| * |
| * Copyright (C) 2006 Carl-Daniel Hailfinger |
| * Released under the GNU GPL v2 or later |
| * |
| * Parts of this file are based on C/7zip/Compress/LZMA_C/LzmaTest.c from the LZMA |
| * SDK 4.42, which is written and distributed to public domain by Igor Pavlov. |
| * |
| */ |
| |
| #include <console/console.h> |
| #include <string.h> |
| #include <lib.h> |
| #include <timestamp.h> |
| |
| #include "lzmadecode.h" |
| |
| size_t ulzman(const void *src, size_t srcn, void *dst, size_t dstn) |
| { |
| unsigned char properties[LZMA_PROPERTIES_SIZE]; |
| const int data_offset = LZMA_PROPERTIES_SIZE + 8; |
| UInt32 outSize; |
| SizeT inProcessed; |
| SizeT outProcessed; |
| int res; |
| CLzmaDecoderState state; |
| SizeT mallocneeds; |
| MAYBE_STATIC unsigned char scratchpad[15980]; |
| const unsigned char *cp; |
| |
| memcpy(properties, src, LZMA_PROPERTIES_SIZE); |
| /* The outSize in LZMA stream is a 64bit integer stored in little-endian |
| * (ref: lzma.cc@LZMACompress: put_64). To prevent accessing by |
| * unaligned memory address and to load in correct endianness, read each |
| * byte and re-construct. */ |
| cp = src + LZMA_PROPERTIES_SIZE; |
| outSize = cp[3] << 24 | cp[2] << 16 | cp[1] << 8 | cp[0]; |
| if (LzmaDecodeProperties(&state.Properties, properties, |
| LZMA_PROPERTIES_SIZE) != LZMA_RESULT_OK) { |
| printk(BIOS_WARNING, "lzma: Incorrect stream properties.\n"); |
| return 0; |
| } |
| mallocneeds = (LzmaGetNumProbs(&state.Properties) * sizeof(CProb)); |
| if (mallocneeds > 15980) { |
| printk(BIOS_WARNING, "lzma: Decoder scratchpad too small!\n"); |
| return 0; |
| } |
| state.Probs = (CProb *)scratchpad; |
| res = LzmaDecode(&state, src + data_offset, srcn - data_offset, |
| &inProcessed, dst, outSize, &outProcessed); |
| if (res != 0) { |
| printk(BIOS_WARNING, "lzma: Decoding error = %d\n", res); |
| return 0; |
| } |
| return outProcessed; |
| } |
| |
| size_t ulzma(const void *src, void *dst) |
| { |
| return ulzman(src, ~(size_t)0, dst, ~(size_t)0); |
| } |