//===- SectionMap.cpp -----------------------------------------------------===//
//
// The MCLinker Project
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include <cassert>
#include <cstring>
#include <mcld/LD/SectionMap.h>
using namespace mcld;
//===----------------------------------------------------------------------===//
// SectionMap
SectionMap::SectionMap()
{
}
SectionMap::~SectionMap()
{
}
const std::string& SectionMap::getOutputSectName(const std::string& pInput)
{
iterator it;
for (it = begin(); it != end(); ++it) {
if (0 == strncmp(pInput.c_str(),
(*it).inputSubStr.c_str(),
(*it).inputSubStr.length()))
break;
// wildcard to a user-defined output section.
else if (0 == strcmp("*", (*it).inputSubStr.c_str()))
break;
}
// if still no matching, just let a output seciton has the same input name
if (it == end())
return pInput;
return (*it).outputStr;
}
bool SectionMap::push_back(const std::string& pInput,
const std::string& pOutput)
{
// Now only check if the mapping exists in the map already
// TODO: handle the cases such as overriding the exist mapping and drawing
// exception from the given SECTIONS command
iterator it;
for (it = m_SectMap.begin(); it != m_SectMap.end(); ++it) {
if (pInput == (*it).inputSubStr)
return false;
}
struct Mapping mapping = {
pInput,
pOutput,
};
m_SectMap.push_back(mapping);
return true;
}
SectionMap::iterator SectionMap::find(const std::string& pInput)
{
iterator it;
for (it = begin(); it != end(); ++it) {
if(pInput == (*it).inputSubStr)
break;
}
return it;
}
SectionMap::Mapping* SectionMap::at(const std::string& pInput)
{
iterator it;
for (it = begin(); it != end(); ++it) {
if(pInput == (*it).inputSubStr)
break;
}
if (end() == it)
return NULL;
return &(*it);
}
// Common mappings of ELF and other formants. Now only ELF specific mappings are added
const SectionMap::SectionNameMapping SectionMap::m_StdSectionMap[] =
{
{".text", ".text"},
{".rodata", ".rodata"},
{".data.rel.ro.local", ".data.rel.ro.local"},
{".data.rel.ro", ".data.rel.ro"},
{".data", ".data"},
{".bss", ".bss"},
{".tdata", ".tdata"},
{".tbss", ".tbss"},
{".init_array", ".init_array"},
{".fini_array", ".fini_array"},
// TODO: Support DT_INIT_ARRAY for all constructors?
{".ctors", ".ctors"},
{".dtors", ".dtors"},
{".sdata", ".sdata"},
{".sbss", ".sbss"},
// FIXME: in GNU ld, if we are creating a shared object .sdata2 and .sbss2
// sections would be handled differently.
{".sdata2", ".sdata"},
{".sbss2", ".sbss"},
{".lrodata", ".lrodata"},
{".ldata", ".ldata"},
{".lbss", ".lbss"},
{".gcc_except_table", ".gcc_except_table"},
{".gnu.linkonce.d.rel.ro.local", ".data.rel.ro.local"},
{".gnu.linkonce.d.rel.ro", ".data.rel.ro"},
{".gnu.linkonce.t", ".text"},
{".gnu.linkonce.r", ".rodata"},
{".gnu.linkonce.d", ".data"},
{".gnu.linkonce.b", ".bss"},
{".gnu.linkonce.s", ".sdata"},
{".gnu.linkonce.sb", ".sbss"},
{".gnu.linkonce.s2", ".sdata"},
{".gnu.linkonce.sb2", ".sbss"},
{".gnu.linkonce.wi", ".debug_info"},
{".gnu.linkonce.td", ".tdata"},
{".gnu.linkonce.tb", ".tbss"},
{".gnu.linkonce.lr", ".lrodata"},
{".gnu.linkonce.l", ".ldata"},
{".gnu.linkonce.lb", ".lbss"},
};
const int SectionMap::m_StdSectionMapSize =
(sizeof(SectionMap::m_StdSectionMap) / sizeof(SectionMap::m_StdSectionMap[0]));
bool SectionMap::initStdSectionMap()
{
for (int i = 0; i < m_StdSectionMapSize; ++i) {
struct Mapping mapping = { m_StdSectionMap[i].from, m_StdSectionMap[i].to};
m_SectMap.push_back(mapping);
}
return true;
}