mirror of
https://github.com/autc04/Retro68.git
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82 lines
1.8 KiB
C++
82 lines
1.8 KiB
C++
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/*
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Copyright 2017 Wolfgang Thaller.
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This file is part of Retro68.
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Retro68 is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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Retro68 is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with Retro68. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "Symtab.h"
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#include <assert.h>
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#include <utility>
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#include "Symbol.h"
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using std::make_pair;
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using std::string;
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Symtab::Symtab(Object& theObject, Elf_Scn *elfsec)
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: elfsec(elfsec)
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{
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data = elf_getdata(elfsec, NULL);
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GElf_Shdr shdr;
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gelf_getshdr(elfsec, &shdr);
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int count = shdr.sh_size / shdr.sh_entsize;
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symbols.reserve(count);
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for(int i = 0; i < count; i++)
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{
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GElf_Sym sym;
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auto res = gelf_getsym(data, i, &sym);
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assert(res != 0);
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symbols.emplace_back(theObject, sym);
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if(sym.st_shndx != SHN_UNDEF && sym.st_shndx < SHN_LORESERVE)
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symbolsByAddress[make_pair((int)sym.st_shndx,sym.st_value)] = i;
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if(sym.st_name)
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symbolsByName[symbols.back().name] = i;
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}
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}
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Symtab::~Symtab()
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{
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}
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Symbol &Symtab::GetSym(int idx)
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{
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return symbols[idx];
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}
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int Symtab::FindSym(int secidx, uint32_t addr)
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{
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auto p = symbolsByAddress.find(make_pair(secidx, addr));
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if(p != symbolsByAddress.end())
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return p->second;
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else
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return -1;
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}
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int Symtab::FindSym(string name)
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{
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auto p = symbolsByName.find(name);
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if(p != symbolsByName.end())
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return p->second;
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else
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return -1;
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}
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