void acpi_db_decode_and_display_object()

in acpica/dbdisply.c [141:336]

• 149 lines of code
• 23 McCabe index (conditional complexity)

void acpi_db_decode_and_display_object(char *target, char *output_type)
{
	void *obj_ptr;
	struct acpi_namespace_node *node;
	union acpi_operand_object *obj_desc;
	u32 display = DB_BYTE_DISPLAY;
	char buffer[80];
	struct acpi_buffer ret_buf;
	acpi_status status;
	u32 size;

	if (!target) {
		return;
	}

	/* Decode the output type */

	if (output_type) {
		acpi_ut_strupr(output_type);
		if (output_type[0] == 'W') {
			display = DB_WORD_DISPLAY;
		} else if (output_type[0] == 'D') {
			display = DB_DWORD_DISPLAY;
		} else if (output_type[0] == 'Q') {
			display = DB_QWORD_DISPLAY;
		}
	}

	ret_buf.length = sizeof(buffer);
	ret_buf.pointer = buffer;

	/* Differentiate between a number and a name */

	if ((target[0] >= 0x30) && (target[0] <= 0x39)) {
		obj_ptr = acpi_db_get_pointer(target);
		if (!acpi_os_readable(obj_ptr, 16)) {
			acpi_os_printf
			    ("Address %p is invalid in this address space\n",
			     obj_ptr);
			return;
		}

		/* Decode the object type */

		switch (ACPI_GET_DESCRIPTOR_TYPE(obj_ptr)) {
		case ACPI_DESC_TYPE_NAMED:

			/* This is a namespace Node */

			if (!acpi_os_readable
			    (obj_ptr, sizeof(struct acpi_namespace_node))) {
				acpi_os_printf
				    ("Cannot read entire Named object at address %p\n",
				     obj_ptr);
				return;
			}

			node = obj_ptr;
			goto dump_node;

		case ACPI_DESC_TYPE_OPERAND:

			/* This is a ACPI OPERAND OBJECT */

			if (!acpi_os_readable
			    (obj_ptr, sizeof(union acpi_operand_object))) {
				acpi_os_printf
				    ("Cannot read entire ACPI object at address %p\n",
				     obj_ptr);
				return;
			}

			acpi_ut_debug_dump_buffer(obj_ptr,
						  sizeof(union
							 acpi_operand_object),
						  display, ACPI_UINT32_MAX);
			acpi_ex_dump_object_descriptor(obj_ptr, 1);
			break;

		case ACPI_DESC_TYPE_PARSER:

			/* This is a Parser Op object */

			if (!acpi_os_readable
			    (obj_ptr, sizeof(union acpi_parse_object))) {
				acpi_os_printf
				    ("Cannot read entire Parser object at address %p\n",
				     obj_ptr);
				return;
			}

			acpi_ut_debug_dump_buffer(obj_ptr,
						  sizeof(union
							 acpi_parse_object),
						  display, ACPI_UINT32_MAX);
			acpi_db_dump_parser_descriptor((union acpi_parse_object
							*)obj_ptr);
			break;

		default:

			/* Is not a recognizable object */

			acpi_os_printf
			    ("Not a known ACPI internal object, descriptor type %2.2X\n",
			     ACPI_GET_DESCRIPTOR_TYPE(obj_ptr));

			size = 16;
			if (acpi_os_readable(obj_ptr, 64)) {
				size = 64;
			}

			/* Just dump some memory */

			acpi_ut_debug_dump_buffer(obj_ptr, size, display,
						  ACPI_UINT32_MAX);
			break;
		}

		return;
	}

	/* The parameter is a name string that must be resolved to a Named obj */

	node = acpi_db_local_ns_lookup(target);
	if (!node) {
		return;
	}

dump_node:
	/* Now dump the NS node */

	status = acpi_get_name(node, ACPI_FULL_PATHNAME_NO_TRAILING, &ret_buf);
	if (ACPI_FAILURE(status)) {
		acpi_os_printf("Could not convert name to pathname\n");
	}

	else {
		acpi_os_printf("Object %p: Namespace Node - Pathname: %s\n",
			       node, (char *)ret_buf.pointer);
	}

	if (!acpi_os_readable(node, sizeof(struct acpi_namespace_node))) {
		acpi_os_printf("Invalid Named object at address %p\n", node);
		return;
	}

	acpi_ut_debug_dump_buffer((void *)node,
				  sizeof(struct acpi_namespace_node), display,
				  ACPI_UINT32_MAX);
	acpi_ex_dump_namespace_node(node, 1);

	obj_desc = acpi_ns_get_attached_object(node);
	if (obj_desc) {
		acpi_os_printf("\nAttached Object %p:", obj_desc);
		if (!acpi_os_readable
		    (obj_desc, sizeof(union acpi_operand_object))) {
			acpi_os_printf
			    ("Invalid internal ACPI Object at address %p\n",
			     obj_desc);
			return;
		}

		if (ACPI_GET_DESCRIPTOR_TYPE(((struct acpi_namespace_node *)
					      obj_desc)) ==
		    ACPI_DESC_TYPE_NAMED) {
			acpi_os_printf(" Namespace Node - ");
			status =
			    acpi_get_name((struct acpi_namespace_node *)
					  obj_desc,
					  ACPI_FULL_PATHNAME_NO_TRAILING,
					  &ret_buf);
			if (ACPI_FAILURE(status)) {
				acpi_os_printf
				    ("Could not convert name to pathname\n");
			} else {
				acpi_os_printf("Pathname: %s",
					       (char *)ret_buf.pointer);
			}

			acpi_os_printf("\n");
			acpi_ut_debug_dump_buffer((void *)obj_desc,
						  sizeof(struct
							 acpi_namespace_node),
						  display, ACPI_UINT32_MAX);
		} else {
			acpi_os_printf("\n");
			acpi_ut_debug_dump_buffer((void *)obj_desc,
						  sizeof(union
							 acpi_operand_object),
						  display, ACPI_UINT32_MAX);
		}

		acpi_ex_dump_object_descriptor(obj_desc, 1);
	}
}