author | jascui |
Wed, 17 Nov 2010 13:39:15 +0800 | |
changeset 687 | da9e6195bd8d |
parent 675 | 02e65118a746 |
permissions | -rw-r--r-- |
0
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/* |
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* Copyright (c) 1996-2009 Nokia Corporation and/or its subsidiary(-ies). |
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* All rights reserved. |
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* This component and the accompanying materials are made available |
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* under the terms of the License "Eclipse Public License v1.0" |
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* which accompanies this distribution, and is available |
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* at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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* |
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* Initial Contributors: |
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* Nokia Corporation - initial contribution. |
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* |
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* Contributors: |
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* |
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* Description: |
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* |
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*/ |
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|
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|
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#include <stdlib.h> |
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#include <string.h> |
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#include <e32std.h> |
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#include "elftran.h" |
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#include "elffile.h" |
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#include "h_utl.h" |
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#include <assert.h> |
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|
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TInt sizeOfRelocs(Elf32_Rel **relocs, TInt nrelocs) |
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{ |
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|
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TInt bytecount=0; |
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TInt page=-1; |
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TInt i; |
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for (i=0; i<nrelocs; i++) |
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{ |
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TInt p=relocs[i]->r_offset&0xfffff000; |
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if (page!=p) |
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{ |
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if (bytecount%4!=0) |
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bytecount+=2; |
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bytecount+=8; // page, block size |
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page=p; |
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} |
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bytecount+=2; |
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} |
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if (bytecount%4!=0) |
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bytecount+=2; |
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return bytecount; |
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} |
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|
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char* E32ImageFile_ELF::CreateRelocs(ELFFile& aElfFile, Elf32_Rel **relocs, TInt nrelocs, TInt &aSize, TUint aBase) |
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{ |
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|
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TInt bytecount=sizeOfRelocs(relocs, nrelocs); |
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aSize=0; |
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if (bytecount==0) |
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return NULL; |
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aSize=bytecount+sizeof(E32RelocSection); |
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|
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char *section=new char [bytecount+sizeof(E32RelocSection)]; |
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char *data=section+sizeof(E32RelocSection); |
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char *startofblock=data; |
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|
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TInt page=-1; |
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TInt pagesize=8; |
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TInt i; |
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for (i=0; i<nrelocs; i++) |
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{ |
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TInt p=relocs[i]->r_offset&0xfffff000; |
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if (page!=p) |
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{ |
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if (pagesize%4!=0) |
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{ |
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*(TUint16 *)data=0; |
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data+=2; |
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pagesize+=2; |
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} |
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if (page == -1) page = p; |
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*(TUint *)startofblock=page - aBase; |
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*(TUint *)(startofblock+4)=pagesize; |
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pagesize=8; |
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page=p; |
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startofblock=data; |
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data+=8; |
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} |
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TUint16 relocType = aElfFile.GetRelocType(relocs[i]); |
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*(TUint16 *)data=(TUint16)((relocs[i]->r_offset&0xfff)|relocType); |
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data+=2; |
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pagesize+=2; |
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} |
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if (pagesize%4!=0) |
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{ |
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*(TUint16 *)data=0; |
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data+=2; |
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pagesize+=2; |
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} |
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*(TUint *)startofblock=page - aBase; |
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*(TUint *)(startofblock+4)=pagesize; |
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((E32RelocSection *)section)->iNumberOfRelocs=nrelocs; |
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((E32RelocSection *)section)->iSize=bytecount; |
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return section; |
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} |
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|
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void checkreloc(ELFFile& aElfFile, TUint va, TUint reloc) |
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{ |
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// This will warn if appears to be outside any known segment. |
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// NB. Such relocations can occur as the result of 'optimizations' |
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// and aren't 'bugs'. |
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// It turns out that the released version of RVCT makes such widespread |
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// use of the optimization that this warning is disconcerting and |
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// unhelpful. |
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(void) aElfFile; |
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(void)va; |
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(void)reloc; |
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#if 0 |
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if (!aElfFile.GetSegmentFromAddr(va)) |
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Print(EWarning, "dubious relocation: [%08x] = %08x\n", reloc, va); |
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#endif |
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} |
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|
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void E32ImageFile_ELF::FixRelocs(ELFFile &aElfFile, Elf32_Rel **codeRelocs, Elf32_Rel **dataRelocs) |
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{ |
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TUint *data; |
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TInt numberOfCodeRelocs = aElfFile.NumberOfCodeRelocs(); |
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TInt numberOfDataRelocs = aElfFile.NumberOfDataRelocs(); |
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for (TInt i=0; i<numberOfCodeRelocs; i++) |
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{ |
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data=aElfFile.CodePtrFromAddr(codeRelocs[i]->r_offset); |
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checkreloc(aElfFile, *data, codeRelocs[i]->r_offset); |
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//*data=FixAddress(aElfFile, *data, codeRelocs[i]); |
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} |
675 | 131 |
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0
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for (TInt j=0; j<numberOfDataRelocs; j++) |
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{ |
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data=aElfFile.DataPtrFromAddr(dataRelocs[j]->r_offset); |
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checkreloc(aElfFile, *data, dataRelocs[j]->r_offset); |
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//*data=FixAddress(aElfFile, *data, dataRelocs[j]); |
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} |
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} |
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TUint E32ImageFile_ELF::FixAddress(ELFFile &aElfFile, TUint va, Elf32_Rel * rel) |
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// |
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// Fix the given virtual address for the new headers |
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// |
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{ |
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Elf32_Phdr * segment = aElfFile.GetSegmentFromAddr(rel->r_offset); |
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assert(aElfFile.CodeSegmentP(segment) || aElfFile.DataSegmentP(segment)); |
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TUint offset = va - segment->p_vaddr; |
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if (aElfFile.CodeSegmentP(segment)) |
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return (TUint)aElfFile.GetCode() + offset; |
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else |
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return (TUint)aElfFile.GetData() + offset; |
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|
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} |
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154 |