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#include "Object.h"
#include "../llvm-objcopy.h"
namespace llvm {
namespace objcopy {
namespace macho {
const SymbolEntry *SymbolTable::getSymbolByIndex(uint32_t Index) const {
assert(Index < Symbols.size() && "invalid symbol index");
return Symbols[Index].get();
}
SymbolEntry *SymbolTable::getSymbolByIndex(uint32_t Index) {
return const_cast<SymbolEntry *>(
static_cast<const SymbolTable *>(this)->getSymbolByIndex(Index));
}
void SymbolTable::removeSymbols(
function_ref<bool(const std::unique_ptr<SymbolEntry> &)> ToRemove) {
Symbols.erase(
std::remove_if(std::begin(Symbols), std::end(Symbols), ToRemove),
std::end(Symbols));
}
void Object::removeSections(function_ref<bool(const Section &)> ToRemove) {
for (LoadCommand &LC : LoadCommands)
LC.Sections.erase(std::remove_if(std::begin(LC.Sections),
std::end(LC.Sections), ToRemove),
std::end(LC.Sections));
}
void Object::addLoadCommand(LoadCommand LC) {
LoadCommands.push_back(std::move(LC));
}
template <typename SegmentType>
static void constructSegment(SegmentType &Seg,
llvm::MachO::LoadCommandType CmdType,
StringRef SegName) {
assert(SegName.size() <= sizeof(Seg.segname) && "too long segment name");
memset(&Seg, 0, sizeof(SegmentType));
Seg.cmd = CmdType;
strncpy(Seg.segname, SegName.data(), SegName.size());
}
LoadCommand &Object::addSegment(StringRef SegName) {
LoadCommand LC;
if (is64Bit())
constructSegment(LC.MachOLoadCommand.segment_command_64_data,
MachO::LC_SEGMENT_64, SegName);
else
constructSegment(LC.MachOLoadCommand.segment_command_data,
MachO::LC_SEGMENT, SegName);
LoadCommands.push_back(LC);
return LoadCommands.back();
}
/// Extracts a segment name from a string which is possibly non-null-terminated.
static StringRef extractSegmentName(const char *SegName) {
return StringRef(SegName,
strnlen(SegName, sizeof(MachO::segment_command::segname)));
}
Optional<StringRef> LoadCommand::getSegmentName() const {
const MachO::macho_load_command &MLC = MachOLoadCommand;
switch (MLC.load_command_data.cmd) {
case MachO::LC_SEGMENT:
return extractSegmentName(MLC.segment_command_data.segname);
case MachO::LC_SEGMENT_64:
return extractSegmentName(MLC.segment_command_64_data.segname);
default:
return None;
}
}
} // end namespace macho
} // end namespace objcopy
} // end namespace llvm
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