From 090d308851492a7b647fab6451fa1a1bb763d6d5 Mon Sep 17 00:00:00 2001
From: jljusten <jljusten@6f19259b-4bc3-4df7-8a09-765794883524>
Date: Mon, 4 Jan 2010 16:17:47 +0000
Subject: [PATCH] IntelFrameworkModulePkg LZMA: Support running LZMA from
 flash/rom

Previously the code relied upon global variables which could not be
modified if the code was running from ROM (or similarly a flash memory
which is not easily modified).

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@9667 6f19259b-4bc3-4df7-8a09-765794883524
---
 .../GuidedSectionExtraction.c                 |  3 +-
 .../LzmaCustomDecompressLib/LzmaDecompress.c  | 53 ++++++++-----------
 .../LzmaDecompressLibInternal.h               |  1 +
 3 files changed, 25 insertions(+), 32 deletions(-)

diff --git a/IntelFrameworkModulePkg/Library/LzmaCustomDecompressLib/GuidedSectionExtraction.c b/IntelFrameworkModulePkg/Library/LzmaCustomDecompressLib/GuidedSectionExtraction.c
index ff91600afd..37dbca0ef0 100644
--- a/IntelFrameworkModulePkg/Library/LzmaCustomDecompressLib/GuidedSectionExtraction.c
+++ b/IntelFrameworkModulePkg/Library/LzmaCustomDecompressLib/GuidedSectionExtraction.c
@@ -73,7 +73,7 @@ LzmaGuidedSectionGetInfo (
 
   return LzmaUefiDecompressGetInfo (
           (UINT8 *) InputSection + ((EFI_GUID_DEFINED_SECTION *) InputSection)->DataOffset,
-          (*(UINT32 *) (((EFI_COMMON_SECTION_HEADER *) InputSection)->Size) & 0x00ffffff) - ((EFI_GUID_DEFINED_SECTION *) InputSection)->DataOffset,
+          SECTION_SIZE (InputSection) - ((EFI_GUID_DEFINED_SECTION *) InputSection)->DataOffset,
           OutputBufferSize,
           ScratchBufferSize
           );
@@ -137,6 +137,7 @@ LzmaGuidedSectionExtraction (
 
   return LzmaUefiDecompress (
     (UINT8 *) InputSection + ((EFI_GUID_DEFINED_SECTION *) InputSection)->DataOffset,
+    SECTION_SIZE (InputSection) - ((EFI_GUID_DEFINED_SECTION *) InputSection)->DataOffset,
     *OutputBuffer,
     ScratchBuffer
     );
diff --git a/IntelFrameworkModulePkg/Library/LzmaCustomDecompressLib/LzmaDecompress.c b/IntelFrameworkModulePkg/Library/LzmaCustomDecompressLib/LzmaDecompress.c
index b8523f4b4f..dd08008258 100644
--- a/IntelFrameworkModulePkg/Library/LzmaCustomDecompressLib/LzmaDecompress.c
+++ b/IntelFrameworkModulePkg/Library/LzmaCustomDecompressLib/LzmaDecompress.c
@@ -17,18 +17,15 @@
 #include "Sdk/C/7zVersion.h"
 #include "Sdk/C/LzmaDec.h"
 
-//
-// Global data
-//
-
-CONST VOID  *mSourceLastUsedWithGetInfo;
-UINT32      mSizeOfLastSource;
-UINT32      mDecompressedSizeForLastSource;
-VOID        *mScratchBuffer;
-UINTN       mScratchBufferSize;
-
 #define SCRATCH_BUFFER_REQUEST_SIZE SIZE_64KB
 
+typedef struct
+{
+  ISzAlloc Functions;
+  VOID     *Buffer;
+  UINTN    BufferSize;
+} ISzAllocWithData;
+
 /**
   Allocation routine used by LZMA decompression.
 
@@ -44,11 +41,12 @@ SzAlloc (
   )
 {
   VOID *Addr;
+  ISzAllocWithData *Private = (ISzAllocWithData*) P;
 
-  if (mScratchBufferSize >= Size) {
-    Addr = mScratchBuffer;
-    mScratchBuffer = (VOID*) ((UINT8*)Addr + Size);
-    mScratchBufferSize -= Size;
+  if (Private->BufferSize >= Size) {
+    Addr = Private->Buffer;
+    Private->Buffer = (VOID*) ((UINT8*)Addr + Size);
+    Private->BufferSize -= Size;
     return Addr;
   } else {
     ASSERT (FALSE);
@@ -75,8 +73,6 @@ SzFree (
   //
 }
 
-STATIC ISzAlloc g_Alloc = { SzAlloc, SzFree };
-
 #define LZMA_HEADER_SIZE (LZMA_PROPS_SIZE + 8)
 
 /**
@@ -151,15 +147,11 @@ LzmaUefiDecompressGetInfo (
 
   DecodedSize = GetDecodedSizeOfBuf((UINT8*)Source);
 
-  mSourceLastUsedWithGetInfo = Source;
-  mSizeOfLastSource = SourceSize;
-  mDecompressedSizeForLastSource = (UInt32)DecodedSize;
-  *DestinationSize = mDecompressedSizeForLastSource;
+  *DestinationSize = (UINT32)DecodedSize;
   *ScratchSize = SCRATCH_BUFFER_REQUEST_SIZE;
   return RETURN_SUCCESS;
 }
 
-
 /**
   Decompresses a Lzma compressed source buffer.
 
@@ -185,6 +177,7 @@ RETURN_STATUS
 EFIAPI
 LzmaUefiDecompress (
   IN CONST VOID  *Source,
+  IN UINTN       SourceSize,
   IN OUT VOID    *Destination,
   IN OUT VOID    *Scratch
   )
@@ -193,16 +186,14 @@ LzmaUefiDecompress (
   ELzmaStatus Status;
   SizeT       DecodedBufSize;
   SizeT       EncodedDataSize;
+  ISzAllocWithData AllocFuncs = {
+    { SzAlloc, SzFree },
+    Scratch,
+    SCRATCH_BUFFER_REQUEST_SIZE
+    };
 
-  if (Source != mSourceLastUsedWithGetInfo) {
-    return RETURN_INVALID_PARAMETER;
-  }
-
-  DecodedBufSize = (SizeT)mDecompressedSizeForLastSource;
-  EncodedDataSize = (SizeT)(mSizeOfLastSource - LZMA_HEADER_SIZE);
-
-  mScratchBuffer = Scratch;
-  mScratchBufferSize = SCRATCH_BUFFER_REQUEST_SIZE;
+  DecodedBufSize = GetDecodedSizeOfBuf((UINT8*)Source);
+  EncodedDataSize = (SizeT) (SourceSize - LZMA_HEADER_SIZE);
 
   LzmaResult = LzmaDecode(
     Destination,
@@ -213,7 +204,7 @@ LzmaUefiDecompress (
     LZMA_PROPS_SIZE,
     LZMA_FINISH_END,
     &Status,
-    &g_Alloc
+    (ISzAlloc*) &AllocFuncs
     );
 
   if (LzmaResult == SZ_OK) {
diff --git a/IntelFrameworkModulePkg/Library/LzmaCustomDecompressLib/LzmaDecompressLibInternal.h b/IntelFrameworkModulePkg/Library/LzmaCustomDecompressLib/LzmaDecompressLibInternal.h
index cc632a21f8..2db60fb19c 100644
--- a/IntelFrameworkModulePkg/Library/LzmaCustomDecompressLib/LzmaDecompressLibInternal.h
+++ b/IntelFrameworkModulePkg/Library/LzmaCustomDecompressLib/LzmaDecompressLibInternal.h
@@ -86,6 +86,7 @@ RETURN_STATUS
 EFIAPI
 LzmaUefiDecompress (
   IN CONST VOID  *Source,
+  IN UINTN       SourceSize,
   IN OUT VOID    *Destination,
   IN OUT VOID    *Scratch
   );
-- 
2.39.2