bcd7041487
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@5058 6f19259b-4bc3-4df7-8a09-765794883524
829 lines
20 KiB
C
829 lines
20 KiB
C
/**@file
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UEFI and Custom Decompress Library
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The function of UefiTianoDecompress() is interface for this module,
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it will do tiano or uefi decompress with different verison parameter.
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See EFI specification 1.1 Chapter 17 to get LZ77 compress/decompress.
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Copyright (c) 2006, Intel Corporation
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All rights reserved. This program and the accompanying materials
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are licensed and made available under the terms and conditions of the BSD License
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which accompanies this distribution. The full text of the license may be found at
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http://opensource.org/licenses/bsd-license.php
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THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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**/
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#include <Guid/CustomDecompress.h>
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#include "BaseUefiTianoCustomDecompressLibInternals.h"
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/**
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Shift mBitBuf NumOfBits left. Read in NumOfBits of bits from source.
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@param Sd The global scratch data
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@param NumOfBits The number of bits to shift and read.
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**/
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VOID
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FillBuf (
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IN SCRATCH_DATA *Sd,
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IN UINT16 NumOfBits
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)
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{
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Sd->mBitBuf = (UINT32) (Sd->mBitBuf << NumOfBits);
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while (NumOfBits > Sd->mBitCount) {
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Sd->mBitBuf |= (UINT32) (Sd->mSubBitBuf << (NumOfBits = (UINT16) (NumOfBits - Sd->mBitCount)));
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if (Sd->mCompSize > 0) {
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//
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// Get 1 byte into SubBitBuf
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//
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Sd->mCompSize--;
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Sd->mSubBitBuf = 0;
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Sd->mSubBitBuf = Sd->mSrcBase[Sd->mInBuf++];
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Sd->mBitCount = 8;
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} else {
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//
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// No more bits from the source, just pad zero bit.
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//
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Sd->mSubBitBuf = 0;
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Sd->mBitCount = 8;
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}
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}
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Sd->mBitCount = (UINT16) (Sd->mBitCount - NumOfBits);
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Sd->mBitBuf |= Sd->mSubBitBuf >> Sd->mBitCount;
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}
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/**
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Get NumOfBits of bits out from mBitBuf
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Get NumOfBits of bits out from mBitBuf. Fill mBitBuf with subsequent
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NumOfBits of bits from source. Returns NumOfBits of bits that are
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popped out.
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@param Sd The global scratch data.
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@param NumOfBits The number of bits to pop and read.
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@return The bits that are popped out.
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**/
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UINT32
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GetBits (
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IN SCRATCH_DATA *Sd,
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IN UINT16 NumOfBits
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)
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{
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UINT32 OutBits;
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OutBits = (UINT32) (Sd->mBitBuf >> (BITBUFSIZ - NumOfBits));
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FillBuf (Sd, NumOfBits);
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return OutBits;
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}
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/**
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Creates Huffman Code mapping table according to code length array.
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Creates Huffman Code mapping table for Extra Set, Char&Len Set
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and Position Set according to code length array.
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@param Sd The global scratch data
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@param NumOfChar Number of symbols in the symbol set
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@param BitLen Code length array
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@param TableBits The width of the mapping table
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@param Table The table
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@retval 0 OK.
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@retval BAD_TABLE The table is corrupted.
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**/
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UINT16
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MakeTable (
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IN SCRATCH_DATA *Sd,
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IN UINT16 NumOfChar,
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IN UINT8 *BitLen,
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IN UINT16 TableBits,
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OUT UINT16 *Table
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)
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{
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UINT16 Count[17];
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UINT16 Weight[17];
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UINT16 Start[18];
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UINT16 *Pointer;
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UINT16 Index3;
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volatile UINT16 Index;
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UINT16 Len;
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UINT16 Char;
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UINT16 JuBits;
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UINT16 Avail;
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UINT16 NextCode;
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UINT16 Mask;
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UINT16 WordOfStart;
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UINT16 WordOfCount;
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for (Index = 1; Index <= 16; Index++) {
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Count[Index] = 0;
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}
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for (Index = 0; Index < NumOfChar; Index++) {
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Count[BitLen[Index]]++;
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}
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Start[1] = 0;
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for (Index = 1; Index <= 16; Index++) {
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WordOfStart = Start[Index];
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WordOfCount = Count[Index];
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Start[Index + 1] = (UINT16) (WordOfStart + (WordOfCount << (16 - Index)));
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}
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if (Start[17] != 0) {
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/*(1U << 16)*/
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return (UINT16) BAD_TABLE;
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}
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JuBits = (UINT16) (16 - TableBits);
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for (Index = 1; Index <= TableBits; Index++) {
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Start[Index] >>= JuBits;
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Weight[Index] = (UINT16) (1U << (TableBits - Index));
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}
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while (Index <= 16) {
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Weight[Index] = (UINT16) (1U << (16 - Index));
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Index++;
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}
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Index = (UINT16) (Start[TableBits + 1] >> JuBits);
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if (Index != 0) {
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Index3 = (UINT16) (1U << TableBits);
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while (Index != Index3) {
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Table[Index++] = 0;
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}
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}
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Avail = NumOfChar;
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Mask = (UINT16) (1U << (15 - TableBits));
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for (Char = 0; Char < NumOfChar; Char++) {
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Len = BitLen[Char];
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if (Len == 0) {
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continue;
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}
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NextCode = (UINT16) (Start[Len] + Weight[Len]);
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if (Len <= TableBits) {
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for (Index = Start[Len]; Index < NextCode; Index++) {
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Table[Index] = Char;
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}
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} else {
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Index3 = Start[Len];
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Pointer = &Table[Index3 >> JuBits];
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Index = (UINT16) (Len - TableBits);
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while (Index != 0) {
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if (*Pointer == 0) {
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Sd->mRight[Avail] = Sd->mLeft[Avail] = 0;
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*Pointer = Avail++;
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}
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if (Index3 & Mask) {
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Pointer = &Sd->mRight[*Pointer];
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} else {
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Pointer = &Sd->mLeft[*Pointer];
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}
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Index3 <<= 1;
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Index--;
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}
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*Pointer = Char;
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}
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Start[Len] = NextCode;
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}
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//
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// Succeeds
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//
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return 0;
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}
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/**
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Decodes a position value.
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@param Sd the global scratch data
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@return The position value decoded.
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**/
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UINT32
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DecodeP (
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IN SCRATCH_DATA *Sd
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)
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{
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UINT16 Val;
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UINT32 Mask;
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UINT32 Pos;
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Val = Sd->mPTTable[Sd->mBitBuf >> (BITBUFSIZ - 8)];
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if (Val >= MAXNP) {
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Mask = 1U << (BITBUFSIZ - 1 - 8);
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do {
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if (Sd->mBitBuf & Mask) {
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Val = Sd->mRight[Val];
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} else {
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Val = Sd->mLeft[Val];
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}
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Mask >>= 1;
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} while (Val >= MAXNP);
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}
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//
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// Advance what we have read
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//
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FillBuf (Sd, Sd->mPTLen[Val]);
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Pos = Val;
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if (Val > 1) {
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Pos = (UINT32) ((1U << (Val - 1)) + GetBits (Sd, (UINT16) (Val - 1)));
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}
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return Pos;
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}
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/**
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Reads code lengths for the Extra Set or the Position Set.
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Read in the Extra Set or Pointion Set Length Arrary, then
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generate the Huffman code mapping for them.
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@param Sd The global scratch data.
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@param nn Number of symbols.
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@param nbit Number of bits needed to represent nn.
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@param Special The special symbol that needs to be taken care of.
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@retval 0 OK.
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@retval BAD_TABLE Table is corrupted.
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**/
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UINT16
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ReadPTLen (
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IN SCRATCH_DATA *Sd,
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IN UINT16 nn,
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IN UINT16 nbit,
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IN UINT16 Special
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)
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{
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UINT16 Number;
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UINT16 CharC;
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volatile UINT16 Index;
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UINT32 Mask;
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Number = (UINT16) GetBits (Sd, nbit);
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if (Number == 0) {
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CharC = (UINT16) GetBits (Sd, nbit);
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for (Index = 0; Index < 256; Index++) {
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Sd->mPTTable[Index] = CharC;
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}
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for (Index = 0; Index < nn; Index++) {
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Sd->mPTLen[Index] = 0;
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}
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return 0;
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}
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Index = 0;
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while (Index < Number) {
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CharC = (UINT16) (Sd->mBitBuf >> (BITBUFSIZ - 3));
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if (CharC == 7) {
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Mask = 1U << (BITBUFSIZ - 1 - 3);
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while (Mask & Sd->mBitBuf) {
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Mask >>= 1;
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CharC += 1;
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}
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}
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FillBuf (Sd, (UINT16) ((CharC < 7) ? 3 : CharC - 3));
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Sd->mPTLen[Index++] = (UINT8) CharC;
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if (Index == Special) {
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CharC = (UINT16) GetBits (Sd, 2);
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while ((INT16) (--CharC) >= 0) {
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Sd->mPTLen[Index++] = 0;
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}
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}
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}
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while (Index < nn) {
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Sd->mPTLen[Index++] = 0;
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}
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return MakeTable (Sd, nn, Sd->mPTLen, 8, Sd->mPTTable);
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}
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/**
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Reads code lengths for Char&Len Set.
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Read in and decode the Char&Len Set Code Length Array, then
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generate the Huffman Code mapping table for the Char&Len Set.
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@param Sd the global scratch data
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**/
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VOID
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ReadCLen (
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SCRATCH_DATA *Sd
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)
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{
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UINT16 Number;
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UINT16 CharC;
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volatile UINT16 Index;
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UINT32 Mask;
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Number = (UINT16) GetBits (Sd, CBIT);
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if (Number == 0) {
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CharC = (UINT16) GetBits (Sd, CBIT);
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for (Index = 0; Index < NC; Index++) {
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Sd->mCLen[Index] = 0;
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}
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for (Index = 0; Index < 4096; Index++) {
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Sd->mCTable[Index] = CharC;
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}
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return ;
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}
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Index = 0;
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while (Index < Number) {
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CharC = Sd->mPTTable[Sd->mBitBuf >> (BITBUFSIZ - 8)];
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if (CharC >= NT) {
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Mask = 1U << (BITBUFSIZ - 1 - 8);
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do {
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if (Mask & Sd->mBitBuf) {
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CharC = Sd->mRight[CharC];
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} else {
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CharC = Sd->mLeft[CharC];
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}
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Mask >>= 1;
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} while (CharC >= NT);
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}
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//
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// Advance what we have read
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//
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FillBuf (Sd, Sd->mPTLen[CharC]);
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if (CharC <= 2) {
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if (CharC == 0) {
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CharC = 1;
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} else if (CharC == 1) {
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CharC = (UINT16) (GetBits (Sd, 4) + 3);
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} else if (CharC == 2) {
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CharC = (UINT16) (GetBits (Sd, CBIT) + 20);
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}
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while ((INT16) (--CharC) >= 0) {
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Sd->mCLen[Index++] = 0;
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}
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} else {
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Sd->mCLen[Index++] = (UINT8) (CharC - 2);
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}
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}
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while (Index < NC) {
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Sd->mCLen[Index++] = 0;
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}
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MakeTable (Sd, NC, Sd->mCLen, 12, Sd->mCTable);
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return ;
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}
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/**
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Decode a character/length value.
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Read one value from mBitBuf, Get one code from mBitBuf. If it is at block boundary, generates
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Huffman code mapping table for Extra Set, Code&Len Set and
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Position Set.
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@param Sd The global scratch data.
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@return The value decoded.
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**/
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UINT16
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DecodeC (
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SCRATCH_DATA *Sd
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)
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{
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UINT16 Index2;
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UINT32 Mask;
|
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if (Sd->mBlockSize == 0) {
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//
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// Starting a new block
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//
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Sd->mBlockSize = (UINT16) GetBits (Sd, 16);
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Sd->mBadTableFlag = ReadPTLen (Sd, NT, TBIT, 3);
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if (Sd->mBadTableFlag != 0) {
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return 0;
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}
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ReadCLen (Sd);
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Sd->mBadTableFlag = ReadPTLen (Sd, MAXNP, Sd->mPBit, (UINT16) (-1));
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if (Sd->mBadTableFlag != 0) {
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return 0;
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}
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}
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Sd->mBlockSize--;
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Index2 = Sd->mCTable[Sd->mBitBuf >> (BITBUFSIZ - 12)];
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if (Index2 >= NC) {
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Mask = 1U << (BITBUFSIZ - 1 - 12);
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do {
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if (Sd->mBitBuf & Mask) {
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Index2 = Sd->mRight[Index2];
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} else {
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Index2 = Sd->mLeft[Index2];
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}
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Mask >>= 1;
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} while (Index2 >= NC);
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}
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//
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// Advance what we have read
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//
|
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FillBuf (Sd, Sd->mCLen[Index2]);
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return Index2;
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}
|
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|
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/**
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Decode the source data ad put the resulting data into the destination buffer.
|
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@param Sd - The global scratch data
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**/
|
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VOID
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Decode (
|
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SCRATCH_DATA *Sd
|
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)
|
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{
|
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UINT16 BytesRemain;
|
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UINT32 DataIdx;
|
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UINT16 CharC;
|
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|
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BytesRemain = (UINT16) (-1);
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|
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DataIdx = 0;
|
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|
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for (;;) {
|
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CharC = DecodeC (Sd);
|
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if (Sd->mBadTableFlag != 0) {
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goto Done ;
|
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}
|
|
|
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if (CharC < 256) {
|
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//
|
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// Process an Original character
|
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//
|
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if (Sd->mOutBuf >= Sd->mOrigSize) {
|
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goto Done ;
|
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} else {
|
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Sd->mDstBase[Sd->mOutBuf++] = (UINT8) CharC;
|
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}
|
|
|
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} else {
|
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//
|
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// Process a Pointer
|
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//
|
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CharC = (UINT16) (CharC - (UINT8_MAX + 1 - THRESHOLD));
|
|
|
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BytesRemain = CharC;
|
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|
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DataIdx = Sd->mOutBuf - DecodeP (Sd) - 1;
|
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|
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BytesRemain--;
|
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while ((INT16) (BytesRemain) >= 0) {
|
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Sd->mDstBase[Sd->mOutBuf++] = Sd->mDstBase[DataIdx++];
|
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if (Sd->mOutBuf >= Sd->mOrigSize) {
|
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goto Done ;
|
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}
|
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|
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BytesRemain--;
|
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}
|
|
}
|
|
}
|
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|
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Done:
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return ;
|
|
}
|
|
|
|
/**
|
|
The internal implementation of *_DECOMPRESS_PROTOCOL.GetInfo().
|
|
|
|
@param Source The source buffer containing the compressed data.
|
|
@param SourceSize The size of source buffer
|
|
@param DestinationSize The size of destination buffer.
|
|
@param ScratchSize The size of scratch buffer.
|
|
|
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@retval RETURN_SUCCESS - The size of destination buffer and the size of scratch buffer are successull retrieved.
|
|
@retval RETURN_INVALID_PARAMETER - The source data is corrupted
|
|
**/
|
|
RETURN_STATUS
|
|
EFIAPI
|
|
UefiDecompressGetInfo (
|
|
IN CONST VOID *Source,
|
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IN UINT32 SourceSize,
|
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OUT UINT32 *DestinationSize,
|
|
OUT UINT32 *ScratchSize
|
|
)
|
|
{
|
|
UINT32 CompressedSize;
|
|
|
|
ASSERT (Source != NULL);
|
|
ASSERT (DestinationSize != NULL);
|
|
ASSERT (ScratchSize != NULL);
|
|
|
|
if (SourceSize < 8) {
|
|
return RETURN_INVALID_PARAMETER;
|
|
}
|
|
|
|
CompressedSize = *(UINT32 *) Source;
|
|
if (SourceSize < (CompressedSize + 8)) {
|
|
return RETURN_INVALID_PARAMETER;
|
|
}
|
|
|
|
*ScratchSize = sizeof (SCRATCH_DATA);
|
|
*DestinationSize = *((UINT32 *) Source + 1);
|
|
|
|
return RETURN_SUCCESS;
|
|
}
|
|
|
|
/**
|
|
The internal implementation of *_DECOMPRESS_PROTOCOL.Decompress().
|
|
|
|
@param Source The source buffer containing the compressed data.
|
|
@param Destination The destination buffer to store the decompressed data
|
|
@param Scratch The buffer used internally by the decompress routine. This buffer is needed to store intermediate data.
|
|
@param Version 1 for UEFI Decompress algoruthm, 2 for Tiano Decompess algorithm
|
|
|
|
@retval RETURN_SUCCESS Decompression is successfull
|
|
@retval RETURN_INVALID_PARAMETER The source data is corrupted
|
|
**/
|
|
RETURN_STATUS
|
|
EFIAPI
|
|
UefiTianoDecompress (
|
|
IN CONST VOID *Source,
|
|
IN OUT VOID *Destination,
|
|
IN OUT VOID *Scratch,
|
|
IN UINT32 Version
|
|
)
|
|
{
|
|
volatile UINT32 Index;
|
|
UINT32 CompSize;
|
|
UINT32 OrigSize;
|
|
SCRATCH_DATA *Sd;
|
|
CONST UINT8 *Src;
|
|
UINT8 *Dst;
|
|
|
|
ASSERT (Source != NULL);
|
|
ASSERT (Destination != NULL);
|
|
ASSERT (Scratch != NULL);
|
|
|
|
Src = Source;
|
|
Dst = Destination;
|
|
|
|
Sd = (SCRATCH_DATA *) Scratch;
|
|
|
|
CompSize = Src[0] + (Src[1] << 8) + (Src[2] << 16) + (Src[3] << 24);
|
|
OrigSize = Src[4] + (Src[5] << 8) + (Src[6] << 16) + (Src[7] << 24);
|
|
|
|
//
|
|
// If compressed file size is 0, return
|
|
//
|
|
if (OrigSize == 0) {
|
|
return RETURN_SUCCESS;
|
|
}
|
|
|
|
Src = Src + 8;
|
|
|
|
for (Index = 0; Index < sizeof (SCRATCH_DATA); Index++) {
|
|
((UINT8 *) Sd)[Index] = 0;
|
|
}
|
|
//
|
|
// The length of the field 'Position Set Code Length Array Size' in Block Header.
|
|
// For UEFI 2.0 de/compression algorithm(Version 1), mPBit = 4
|
|
// For Tiano de/compression algorithm(Version 2), mPBit = 5
|
|
//
|
|
switch (Version) {
|
|
case 1 :
|
|
Sd->mPBit = 4;
|
|
break;
|
|
case 2 :
|
|
Sd->mPBit = 5;
|
|
break;
|
|
default:
|
|
ASSERT (FALSE);
|
|
}
|
|
Sd->mSrcBase = (UINT8 *)Src;
|
|
Sd->mDstBase = Dst;
|
|
Sd->mCompSize = CompSize;
|
|
Sd->mOrigSize = OrigSize;
|
|
|
|
//
|
|
// Fill the first BITBUFSIZ bits
|
|
//
|
|
FillBuf (Sd, BITBUFSIZ);
|
|
|
|
//
|
|
// Decompress it
|
|
//
|
|
Decode (Sd);
|
|
|
|
if (Sd->mBadTableFlag != 0) {
|
|
//
|
|
// Something wrong with the source
|
|
//
|
|
return RETURN_INVALID_PARAMETER;
|
|
}
|
|
|
|
return RETURN_SUCCESS;
|
|
}
|
|
|
|
/**
|
|
The internal implementation of *_DECOMPRESS_PROTOCOL.Decompress().
|
|
|
|
@param Source - The source buffer containing the compressed data.
|
|
@param Destination - The destination buffer to store the decompressed data
|
|
@param Scratch - The buffer used internally by the decompress routine. This buffer is needed to store intermediate data.
|
|
|
|
@retval RETURN_SUCCESS - Decompression is successfull
|
|
@retval RETURN_INVALID_PARAMETER - The source data is corrupted
|
|
**/
|
|
RETURN_STATUS
|
|
EFIAPI
|
|
UefiDecompress (
|
|
IN CONST VOID *Source,
|
|
IN OUT VOID *Destination,
|
|
IN OUT VOID *Scratch
|
|
)
|
|
{
|
|
return UefiTianoDecompress (Source, Destination, Scratch, 1);
|
|
}
|
|
|
|
/**
|
|
The internal implementation of Tiano decompress GetInfo.
|
|
|
|
@param InputSection Buffer containing the input GUIDed section to be processed.
|
|
@param OutputBufferSize The size of OutputBuffer.
|
|
@param ScratchBufferSize The size of ScratchBuffer.
|
|
@param SectionAttribute The attribute of the input guided section.
|
|
|
|
@retval RETURN_SUCCESS - The size of destination buffer and the size of scratch buffer are successull retrieved.
|
|
@retval RETURN_INVALID_PARAMETER - The source data is corrupted
|
|
The GUID in InputSection does not match this instance guid.
|
|
**/
|
|
RETURN_STATUS
|
|
EFIAPI
|
|
TianoDecompressGetInfo (
|
|
IN CONST VOID *InputSection,
|
|
OUT UINT32 *OutputBufferSize,
|
|
OUT UINT32 *ScratchBufferSize,
|
|
OUT UINT16 *SectionAttribute
|
|
)
|
|
|
|
{
|
|
ASSERT (SectionAttribute != NULL);
|
|
|
|
if (InputSection == NULL) {
|
|
return RETURN_INVALID_PARAMETER;
|
|
}
|
|
|
|
if (!CompareGuid (
|
|
&gTianoCustomDecompressGuid,
|
|
&(((EFI_GUID_DEFINED_SECTION *) InputSection)->SectionDefinitionGuid))) {
|
|
return RETURN_INVALID_PARAMETER;
|
|
}
|
|
//
|
|
// Get guid attribute of guid section.
|
|
//
|
|
*SectionAttribute = ((EFI_GUID_DEFINED_SECTION *) InputSection)->Attributes;
|
|
|
|
//
|
|
// Call Tiano GetInfo to get the required size info.
|
|
//
|
|
return UefiDecompressGetInfo (
|
|
(UINT8 *) InputSection + ((EFI_GUID_DEFINED_SECTION *) InputSection)->DataOffset,
|
|
(*(UINT32 *) (((EFI_COMMON_SECTION_HEADER *) InputSection)->Size) & 0x00ffffff) - ((EFI_GUID_DEFINED_SECTION *) InputSection)->DataOffset,
|
|
OutputBufferSize,
|
|
ScratchBufferSize
|
|
);
|
|
}
|
|
|
|
/**
|
|
The implementation of Tiano Decompress().
|
|
|
|
@param InputSection Buffer containing the input GUIDed section to be processed.
|
|
@param OutputBuffer OutputBuffer to point to the start of the section's contents.
|
|
if guided data is not prcessed. Otherwise,
|
|
OutputBuffer to contain the output data, which is allocated by the caller.
|
|
@param ScratchBuffer A pointer to a caller-allocated buffer for function internal use.
|
|
@param AuthenticationStatus A pointer to a caller-allocated UINT32 that indicates the
|
|
authentication status of the output buffer.
|
|
|
|
@retval RETURN_SUCCESS Decompression is successfull
|
|
@retval RETURN_INVALID_PARAMETER The source data is corrupted, or
|
|
The GUID in InputSection does not match this instance guid.
|
|
|
|
**/
|
|
RETURN_STATUS
|
|
EFIAPI
|
|
TianoDecompress (
|
|
IN CONST VOID *InputSection,
|
|
OUT VOID **OutputBuffer,
|
|
IN VOID *ScratchBuffer, OPTIONAL
|
|
OUT UINT32 *AuthenticationStatus
|
|
)
|
|
{
|
|
ASSERT (OutputBuffer != NULL);
|
|
|
|
if (InputSection == NULL) {
|
|
return RETURN_INVALID_PARAMETER;
|
|
}
|
|
|
|
if (!CompareGuid (
|
|
&gTianoCustomDecompressGuid,
|
|
&(((EFI_GUID_DEFINED_SECTION *) InputSection)->SectionDefinitionGuid))) {
|
|
return RETURN_INVALID_PARAMETER;
|
|
}
|
|
|
|
//
|
|
// Set Authentication to Zero.
|
|
//
|
|
*AuthenticationStatus = 0;
|
|
|
|
//
|
|
// Call Tiano Decompress to get the raw data
|
|
//
|
|
return UefiTianoDecompress (
|
|
(UINT8 *) InputSection + ((EFI_GUID_DEFINED_SECTION *) InputSection)->DataOffset,
|
|
*OutputBuffer,
|
|
ScratchBuffer,
|
|
2
|
|
);
|
|
}
|
|
|
|
/**
|
|
Register TianoDecompress handler.
|
|
|
|
@retval RETURN_SUCCESS Register successfully.
|
|
@retval RETURN_OUT_OF_RESOURCES No enough memory to store this handler.
|
|
**/
|
|
EFI_STATUS
|
|
EFIAPI
|
|
TianoDecompressLibConstructor (
|
|
)
|
|
{
|
|
return ExtractGuidedSectionRegisterHandlers (
|
|
&gTianoCustomDecompressGuid,
|
|
TianoDecompressGetInfo,
|
|
TianoDecompress
|
|
);
|
|
}
|