70 lines
2.6 KiB
C++
Executable File
70 lines
2.6 KiB
C++
Executable File
/**********
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* Copyright (c) 2004 Greg Parker. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY GREG PARKER ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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**********/
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#include "elf.h"
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#include "swap.h"
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#include "symboltable.h"
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#include "complain.h"
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#include "relocation.h"
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Relocation::Relocation(uint8_t newType, uint32_t newOffset, Symbol *newSymbol, int32_t newAddend)
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: mType(newType),
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mOffset(newOffset),
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mAddend(newAddend),
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mSymbol(newSymbol)
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{
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// no local-symbol-relative relocations allowed
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if (!mSymbol->isGlobal())
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error("attempted relocation relative to non-global symbol '%s'",
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mSymbol->name().c_str());
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mSymbol->setUsed();
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}
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Relocation::Relocation(const Elf32_Rel *rel, const SymbolTable& symtab, const Section §ion)
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: mType(ELF32_R_TYPE(swap32(rel->r_info))),
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mOffset(swap32(rel->r_offset)),
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mAddend(0),
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mSymbol(symtab[ELF32_R_SYM(swap32(rel->r_info))])
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{
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// use offset in section, not vm address
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mOffset -= section.vmaddr();
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}
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uint8_t Relocation::type(void) const { return mType; }
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uint32_t Relocation::offset(void) const { return mOffset; }
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int32_t Relocation::addend(void) const { return mAddend; }
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Symbol *Relocation::symbol(void) const { return mSymbol; }
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Elf32_Rela Relocation::asElf(const SymbolTable& symtab) const
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{
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Elf32_Rela result;
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result.r_offset = swap32(mOffset);
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result.r_info = swap32(ELF32_R_INFO(symtab.indexOf(mSymbol), mType));
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result.r_addend = swap32(mAddend);
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return result;
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}
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