Exemple #1
0
// get value object specialized to work with llvm IR types
lldb::ValueObjectSP
ABISysV_hexagon::GetReturnValueObjectImpl( lldb_private::Thread &thread, llvm::Type &retType ) const
{
    Value value;
    ValueObjectSP vObjSP;

    // get the current register context
    RegisterContext *reg_ctx = thread.GetRegisterContext().get();
    if (!reg_ctx)
        return vObjSP;

    // for now just pop R0 to find the return value
    const lldb_private::RegisterInfo *r0_info = reg_ctx->GetRegisterInfoAtIndex( 0 );
    if ( r0_info == nullptr )
        return vObjSP;
    
    // void return type
    if ( retType.isVoidTy( ) )
    {
        value.GetScalar( ) = 0;
    }
    // integer / pointer return type
    else
    if ( retType.isIntegerTy( ) || retType.isPointerTy( ) )
    {
        // read r0 register value
        lldb_private::RegisterValue r0_value;
        if ( !reg_ctx->ReadRegister( r0_info, r0_value ) )
            return vObjSP;

        // push r0 into value
        uint32_t r0_u32 = r0_value.GetAsUInt32( );

        // account for integer size
        if ( retType.isIntegerTy() && retType.isSized() )
        {
            uint64_t size = retType.getScalarSizeInBits( );
            uint64_t mask = ( 1ull << size ) - 1;
            // mask out higher order bits then the type we expect
            r0_u32 &= mask;
        }

        value.GetScalar( ) = r0_u32;
    }
    // unsupported return type
    else
        return vObjSP;

    // pack the value into a ValueObjectSP
    vObjSP = ValueObjectConstResult::Create
    (
        thread.GetStackFrameAtIndex(0).get(),
        value,
        ConstString("")
    );
    return vObjSP;
}
Exemple #2
0
DataType llvm_type_to_nts_type ( const llvm::Type & t )
{
	if ( t.isIntegerTy() )
	{
		auto & it = llvm::cast<llvm::IntegerType> ( t );
		return DataType ( ScalarType::BitVector ( it.getBitWidth() ) );
	}
	/*else if ( t.isPointerTy() ) {
		return nts::DataType::BitVector ( 64 ); // 64 bit pointers
	}
	*/
	else
	{
		throw std::logic_error ( "Only integer types are supported" );
	}
}