ValueObjectSP
ABIMacOSX_arm::GetReturnValueObjectImpl (Thread &thread,
lldb_private::ClangASTType &ast_type) const
{
Value value;
ValueObjectSP return_valobj_sp;
void *value_type = ast_type.GetOpaqueQualType();
if (!value_type)
return return_valobj_sp;
clang::ASTContext *ast_context = ast_type.GetASTContext();
if (!ast_context)
return return_valobj_sp;
value.SetContext (Value::eContextTypeClangType, value_type);
RegisterContext *reg_ctx = thread.GetRegisterContext().get();
if (!reg_ctx)
return return_valobj_sp;
bool is_signed;
// Get the pointer to the first stack argument so we have a place to start
// when reading data
const RegisterInfo *r0_reg_info = reg_ctx->GetRegisterInfoByName("r0", 0);
if (ClangASTContext::IsIntegerType (value_type, is_signed))
{
size_t bit_width = ClangASTType::GetClangTypeBitWidth(ast_context, value_type);
switch (bit_width)
{
default:
return return_valobj_sp;
case 64:
{
const RegisterInfo *r1_reg_info = reg_ctx->GetRegisterInfoByName("r1", 0);
uint64_t raw_value;
raw_value = reg_ctx->ReadRegisterAsUnsigned(r0_reg_info, 0) & UINT32_MAX;
raw_value |= ((uint64_t)(reg_ctx->ReadRegisterAsUnsigned(r1_reg_info, 0) & UINT32_MAX)) << 32;
if (is_signed)
value.GetScalar() = (int64_t)raw_value;
else
value.GetScalar() = (uint64_t)raw_value;
}
break;
case 32:
if (is_signed)
value.GetScalar() = (int32_t)(reg_ctx->ReadRegisterAsUnsigned(r0_reg_info, 0) & UINT32_MAX);
else
value.GetScalar() = (uint32_t)(reg_ctx->ReadRegisterAsUnsigned(r0_reg_info, 0) & UINT32_MAX);
break;
case 16:
if (is_signed)
value.GetScalar() = (int16_t)(reg_ctx->ReadRegisterAsUnsigned(r0_reg_info, 0) & UINT16_MAX);
else
value.GetScalar() = (uint16_t)(reg_ctx->ReadRegisterAsUnsigned(r0_reg_info, 0) & UINT16_MAX);
break;
case 8:
if (is_signed)
value.GetScalar() = (int8_t)(reg_ctx->ReadRegisterAsUnsigned(r0_reg_info, 0) & UINT8_MAX);
else
value.GetScalar() = (uint8_t)(reg_ctx->ReadRegisterAsUnsigned(r0_reg_info, 0) & UINT8_MAX);
break;
}
}
else if (ClangASTContext::IsPointerType (value_type))
{
uint32_t ptr = thread.GetRegisterContext()->ReadRegisterAsUnsigned(r0_reg_info, 0) & UINT32_MAX;
value.GetScalar() = ptr;
}
else
{
// not handled yet
return return_valobj_sp;
}
// If we get here, we have a valid Value, so make our ValueObject out of it:
return_valobj_sp = ValueObjectConstResult::Create(
thread.GetStackFrameAtIndex(0).get(),
ast_type.GetASTContext(),
value,
ConstString(""));
return return_valobj_sp;
}
TypeImpl::TypeImpl(const lldb_private::ClangASTType& clang_ast_type) :
m_clang_ast_type(clang_ast_type.GetASTContext(), clang_ast_type.GetOpaqueQualType()),
m_type_sp()
{}