2 * Copyright (c) 2004 Greg Parker. All rights reserved.
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
13 * THIS SOFTWARE IS PROVIDED BY GREG PARKER ``AS IS'' AND ANY EXPRESS OR
14 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
15 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
16 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
17 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
18 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
19 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
20 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
21 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
22 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 #include "symboltable.h"
30 #include "relocation.h"
33 Relocation::Relocation(uint8_t newType, uint32_t newOffset, const Symbol *newSymbol, int32_t newAddend)
39 // no local-symbol-relative relocations allowed
40 if (!mSymbol->isGlobal())
41 error("attempted relocation relative to non-global symbol '%s'",
42 mSymbol->name().c_str());
45 Relocation::Relocation(const Elf32_Rel *rel, const SymbolTable& symtab, const Section §ion)
46 : mType(ELF32_R_TYPE(swap32(rel->r_info))),
47 mOffset(swap32(rel->r_offset)),
49 mSymbol(symtab[ELF32_R_SYM(swap32(rel->r_info))])
51 // use offset in section, not vm address
52 mOffset -= section.vmaddr();
55 uint8_t Relocation::type(void) const { return mType; }
56 uint32_t Relocation::offset(void) const { return mOffset; }
57 int32_t Relocation::addend(void) const { return mAddend; }
58 const Symbol *Relocation::symbol(void) const { return mSymbol; }
60 Elf32_Rela Relocation::asElf(const SymbolTable& symtab) const
63 result.r_offset = swap32(mOffset);
64 result.r_info = swap32(ELF32_R_INFO(symtab.indexOf(mSymbol), mType));
65 result.r_addend = swap32(mAddend);