-namespace {
-
- // Per section and per symbol attributes are not supported.
- // To implement them we would need the ability to delay this emission
- // until the assembly file is fully parsed/generated as only then do we
- // know the symbol and section numbers.
- class AttributeEmitter {
- public:
- virtual void MaybeSwitchVendor(StringRef Vendor) = 0;
- virtual void EmitAttribute(unsigned Attribute, unsigned Value) = 0;
- virtual void EmitTextAttribute(unsigned Attribute, StringRef String) = 0;
- virtual void Finish() = 0;
- virtual ~AttributeEmitter() {}
- };
-
- class AsmAttributeEmitter : public AttributeEmitter {
- MCStreamer &Streamer;
-
- public:
- AsmAttributeEmitter(MCStreamer &Streamer_) : Streamer(Streamer_) {}
- void MaybeSwitchVendor(StringRef Vendor) { }
-
- void EmitAttribute(unsigned Attribute, unsigned Value) {
- Streamer.EmitRawText("\t.eabi_attribute " +
- Twine(Attribute) + ", " + Twine(Value));
- }
-
- void EmitTextAttribute(unsigned Attribute, StringRef String) {
- switch (Attribute) {
- case ARMBuildAttrs::CPU_name:
- Streamer.EmitRawText(StringRef("\t.cpu ") + String.lower());
- break;
- /* GAS requires .fpu to be emitted regardless of EABI attribute */
- case ARMBuildAttrs::Advanced_SIMD_arch:
- case ARMBuildAttrs::VFP_arch:
- Streamer.EmitRawText(StringRef("\t.fpu ") + String.lower());
- break;
- default: assert(0 && "Unsupported Text attribute in ASM Mode"); break;
- }
- }
- void Finish() { }
- };
-
- class ObjectAttributeEmitter : public AttributeEmitter {
- // This structure holds all attributes, accounting for
- // their string/numeric value, so we can later emmit them
- // in declaration order, keeping all in the same vector
- struct AttributeItemType {
- enum {
- HiddenAttribute = 0,
- NumericAttribute,
- TextAttribute
- } Type;
- unsigned Tag;
- unsigned IntValue;
- StringRef StringValue;
- } AttributeItem;
-
- MCObjectStreamer &Streamer;
- StringRef CurrentVendor;
- SmallVector<AttributeItemType, 64> Contents;
-
- // Account for the ULEB/String size of each item,
- // not just the number of items
- size_t ContentsSize;
- // FIXME: this should be in a more generic place, but
- // getULEBSize() is in MCAsmInfo and will be moved to MCDwarf
- size_t getULEBSize(int Value) {
- size_t Size = 0;
- do {
- Value >>= 7;
- Size += sizeof(int8_t); // Is this really necessary?
- } while (Value);
- return Size;
- }
-
- public:
- ObjectAttributeEmitter(MCObjectStreamer &Streamer_) :
- Streamer(Streamer_), CurrentVendor(""), ContentsSize(0) { }
-
- void MaybeSwitchVendor(StringRef Vendor) {
- assert(!Vendor.empty() && "Vendor cannot be empty.");
-
- if (CurrentVendor.empty())
- CurrentVendor = Vendor;
- else if (CurrentVendor == Vendor)
- return;
- else
- Finish();
-
- CurrentVendor = Vendor;
-
- assert(Contents.size() == 0);
- }
-
- void EmitAttribute(unsigned Attribute, unsigned Value) {
- AttributeItemType attr = {
- AttributeItemType::NumericAttribute,
- Attribute,
- Value,
- StringRef("")
- };
- ContentsSize += getULEBSize(Attribute);
- ContentsSize += getULEBSize(Value);
- Contents.push_back(attr);
- }
-
- void EmitTextAttribute(unsigned Attribute, StringRef String) {
- AttributeItemType attr = {
- AttributeItemType::TextAttribute,
- Attribute,
- 0,
- String
- };
- ContentsSize += getULEBSize(Attribute);
- // String + \0
- ContentsSize += String.size()+1;
-
- Contents.push_back(attr);
- }