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// SPDX-License-Identifier: GPL-3.0-or-later
#include "rcc/MC/MCSection.h"
#include <cstdint>
#include <string_view>
namespace rcc::mc {
namespace {
[[nodiscard]] bool isValidAssemblyName(std::string_view Name) noexcept {
if (Name.empty())
return false;
for (const char RawCharacter : Name) {
const auto Character = static_cast<unsigned char>(RawCharacter);
if (Character == 0 || Character == '\n' || Character == '\r' || Character == 0x7fU)
return false;
}
return true;
}
[[nodiscard]] bool isPowerOfTwo(std::uint64_t Value) noexcept {
return Value != 0 && (Value & (Value - 1U)) == 0;
}
} // namespace
Expected<void> MCSectionDesc::verify() const {
if (!isValidAssemblyName(Name))
return makeUnexpected(ErrorCode::InvalidArgument, "MC section has an invalid name");
if (!isPowerOfTwo(Alignment)) {
return makeUnexpected(ErrorCode::InvalidArgument,
"MC section alignment must be a nonzero power of two");
}
if (Flags.has(MCSectionFlag::Strings) && !Flags.has(MCSectionFlag::Merge)) {
return makeUnexpected(ErrorCode::InvalidArgument, "string MC sections must also be mergeable");
}
if (Flags.has(MCSectionFlag::Merge) && EntrySize == 0) {
return makeUnexpected(ErrorCode::InvalidArgument,
"mergeable MC sections require a nonzero entry size");
}
if ((Kind == MCSectionKind::TLSData || Kind == MCSectionKind::TLSBSS) &&
!Flags.has(MCSectionFlag::TLS)) {
return makeUnexpected(ErrorCode::InvalidArgument,
"TLS MC sections must carry the TLS section flag");
}
if (Flags.has(MCSectionFlag::Group) != static_cast<bool>(Group)) {
return makeUnexpected(ErrorCode::InvalidArgument,
"MC section group flag and group symbol must agree");
}
if (Group && Group->name().empty()) {
return makeUnexpected(ErrorCode::InvalidArgument, "MC section group symbol must have a name");
}
if (UniqueID && *UniqueID == 0) {
return makeUnexpected(ErrorCode::InvalidArgument, "unique MC section identity must be nonzero");
}
return {};
}
} // namespace rcc::mc
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