406 lines
10 KiB
C
406 lines
10 KiB
C
// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
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/******************************************************************************
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*
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* Module Name: exconcat - Concatenate-type AML operators
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*
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* Copyright (C) 2000 - 2022, Intel Corp.
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*
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*****************************************************************************/
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#include <acpi/acpi.h>
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#include "accommon.h"
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#include "acinterp.h"
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#include "amlresrc.h"
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#define _COMPONENT ACPI_EXECUTER
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ACPI_MODULE_NAME("exconcat")
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/* Local Prototypes */
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static acpi_status
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acpi_ex_convert_to_object_type_string(union acpi_operand_object *obj_desc,
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union acpi_operand_object **result_desc);
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/*******************************************************************************
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*
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* FUNCTION: acpi_ex_do_concatenate
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*
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* PARAMETERS: operand0 - First source object
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* operand1 - Second source object
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* actual_return_desc - Where to place the return object
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* walk_state - Current walk state
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*
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* RETURN: Status
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*
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* DESCRIPTION: Concatenate two objects with the ACPI-defined conversion
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* rules as necessary.
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* NOTE:
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* Per the ACPI spec (up to 6.1), Concatenate only supports Integer,
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* String, and Buffer objects. However, we support all objects here
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* as an extension. This improves the usefulness of both Concatenate
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* and the Printf/Fprintf macros. The extension returns a string
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* describing the object type for the other objects.
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* 02/2016.
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*
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******************************************************************************/
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acpi_status
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acpi_ex_do_concatenate(union acpi_operand_object *operand0,
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union acpi_operand_object *operand1,
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union acpi_operand_object **actual_return_desc,
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struct acpi_walk_state *walk_state)
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{
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union acpi_operand_object *local_operand0 = operand0;
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union acpi_operand_object *local_operand1 = operand1;
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union acpi_operand_object *temp_operand1 = NULL;
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union acpi_operand_object *return_desc;
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char *buffer;
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acpi_object_type operand0_type;
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acpi_object_type operand1_type;
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acpi_status status;
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ACPI_FUNCTION_TRACE(ex_do_concatenate);
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/* Operand 0 preprocessing */
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switch (operand0->common.type) {
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case ACPI_TYPE_INTEGER:
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case ACPI_TYPE_STRING:
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case ACPI_TYPE_BUFFER:
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operand0_type = operand0->common.type;
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break;
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default:
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/* For all other types, get the "object type" string */
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status =
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acpi_ex_convert_to_object_type_string(operand0,
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&local_operand0);
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if (ACPI_FAILURE(status)) {
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goto cleanup;
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}
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operand0_type = ACPI_TYPE_STRING;
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break;
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}
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/* Operand 1 preprocessing */
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switch (operand1->common.type) {
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case ACPI_TYPE_INTEGER:
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case ACPI_TYPE_STRING:
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case ACPI_TYPE_BUFFER:
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operand1_type = operand1->common.type;
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break;
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default:
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/* For all other types, get the "object type" string */
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status =
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acpi_ex_convert_to_object_type_string(operand1,
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&local_operand1);
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if (ACPI_FAILURE(status)) {
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goto cleanup;
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}
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operand1_type = ACPI_TYPE_STRING;
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break;
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}
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/*
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* Convert the second operand if necessary. The first operand (0)
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* determines the type of the second operand (1) (See the Data Types
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* section of the ACPI specification). Both object types are
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* guaranteed to be either Integer/String/Buffer by the operand
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* resolution mechanism.
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*/
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switch (operand0_type) {
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case ACPI_TYPE_INTEGER:
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status =
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acpi_ex_convert_to_integer(local_operand1, &temp_operand1,
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ACPI_IMPLICIT_CONVERSION);
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break;
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case ACPI_TYPE_BUFFER:
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status =
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acpi_ex_convert_to_buffer(local_operand1, &temp_operand1);
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break;
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case ACPI_TYPE_STRING:
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switch (operand1_type) {
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case ACPI_TYPE_INTEGER:
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case ACPI_TYPE_STRING:
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case ACPI_TYPE_BUFFER:
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/* Other types have already been converted to string */
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status =
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acpi_ex_convert_to_string(local_operand1,
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&temp_operand1,
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ACPI_IMPLICIT_CONVERT_HEX);
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break;
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default:
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status = AE_OK;
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break;
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}
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break;
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default:
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ACPI_ERROR((AE_INFO, "Invalid object type: 0x%X",
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operand0->common.type));
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status = AE_AML_INTERNAL;
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}
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if (ACPI_FAILURE(status)) {
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goto cleanup;
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}
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/* Take care with any newly created operand objects */
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if ((local_operand1 != operand1) && (local_operand1 != temp_operand1)) {
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acpi_ut_remove_reference(local_operand1);
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}
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local_operand1 = temp_operand1;
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/*
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* Both operands are now known to be the same object type
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* (Both are Integer, String, or Buffer), and we can now perform
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* the concatenation.
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*
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* There are three cases to handle, as per the ACPI spec:
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*
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* 1) Two Integers concatenated to produce a new Buffer
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* 2) Two Strings concatenated to produce a new String
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* 3) Two Buffers concatenated to produce a new Buffer
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*/
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switch (operand0_type) {
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case ACPI_TYPE_INTEGER:
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/* Result of two Integers is a Buffer */
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/* Need enough buffer space for two integers */
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return_desc = acpi_ut_create_buffer_object((acpi_size)
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ACPI_MUL_2
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(acpi_gbl_integer_byte_width));
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if (!return_desc) {
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status = AE_NO_MEMORY;
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goto cleanup;
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}
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buffer = (char *)return_desc->buffer.pointer;
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/* Copy the first integer, LSB first */
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memcpy(buffer, &operand0->integer.value,
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acpi_gbl_integer_byte_width);
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/* Copy the second integer (LSB first) after the first */
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memcpy(buffer + acpi_gbl_integer_byte_width,
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&local_operand1->integer.value,
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acpi_gbl_integer_byte_width);
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break;
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case ACPI_TYPE_STRING:
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/* Result of two Strings is a String */
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return_desc = acpi_ut_create_string_object(((acpi_size)
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local_operand0->
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string.length +
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local_operand1->
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string.length));
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if (!return_desc) {
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status = AE_NO_MEMORY;
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goto cleanup;
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}
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buffer = return_desc->string.pointer;
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/* Concatenate the strings */
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strcpy(buffer, local_operand0->string.pointer);
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strcat(buffer, local_operand1->string.pointer);
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break;
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case ACPI_TYPE_BUFFER:
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/* Result of two Buffers is a Buffer */
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return_desc = acpi_ut_create_buffer_object(((acpi_size)
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operand0->buffer.
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length +
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local_operand1->
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buffer.length));
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if (!return_desc) {
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status = AE_NO_MEMORY;
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goto cleanup;
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}
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buffer = (char *)return_desc->buffer.pointer;
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/* Concatenate the buffers */
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memcpy(buffer, operand0->buffer.pointer,
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operand0->buffer.length);
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memcpy(buffer + operand0->buffer.length,
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local_operand1->buffer.pointer,
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local_operand1->buffer.length);
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break;
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default:
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/* Invalid object type, should not happen here */
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ACPI_ERROR((AE_INFO, "Invalid object type: 0x%X",
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operand0->common.type));
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status = AE_AML_INTERNAL;
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goto cleanup;
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}
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*actual_return_desc = return_desc;
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cleanup:
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if (local_operand0 != operand0) {
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acpi_ut_remove_reference(local_operand0);
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}
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if (local_operand1 != operand1) {
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acpi_ut_remove_reference(local_operand1);
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}
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return_ACPI_STATUS(status);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ex_convert_to_object_type_string
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*
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* PARAMETERS: obj_desc - Object to be converted
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* return_desc - Where to place the return object
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*
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* RETURN: Status
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*
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* DESCRIPTION: Convert an object of arbitrary type to a string object that
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* contains the namestring for the object. Used for the
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* concatenate operator.
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*
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******************************************************************************/
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static acpi_status
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acpi_ex_convert_to_object_type_string(union acpi_operand_object *obj_desc,
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union acpi_operand_object **result_desc)
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{
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union acpi_operand_object *return_desc;
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const char *type_string;
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type_string = acpi_ut_get_type_name(obj_desc->common.type);
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return_desc = acpi_ut_create_string_object(((acpi_size)strlen(type_string) + 9)); /* 9 For "[ Object]" */
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if (!return_desc) {
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return (AE_NO_MEMORY);
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}
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strcpy(return_desc->string.pointer, "[");
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strcat(return_desc->string.pointer, type_string);
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strcat(return_desc->string.pointer, " Object]");
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*result_desc = return_desc;
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return (AE_OK);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ex_concat_template
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*
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* PARAMETERS: operand0 - First source object
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* operand1 - Second source object
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* actual_return_desc - Where to place the return object
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* walk_state - Current walk state
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*
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* RETURN: Status
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*
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* DESCRIPTION: Concatenate two resource templates
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*
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******************************************************************************/
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acpi_status
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acpi_ex_concat_template(union acpi_operand_object *operand0,
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union acpi_operand_object *operand1,
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union acpi_operand_object **actual_return_desc,
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struct acpi_walk_state *walk_state)
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{
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acpi_status status;
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union acpi_operand_object *return_desc;
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u8 *new_buf;
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u8 *end_tag;
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acpi_size length0;
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acpi_size length1;
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acpi_size new_length;
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ACPI_FUNCTION_TRACE(ex_concat_template);
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/*
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* Find the end_tag descriptor in each resource template.
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* Note1: returned pointers point TO the end_tag, not past it.
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* Note2: zero-length buffers are allowed; treated like one end_tag
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*/
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/* Get the length of the first resource template */
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status = acpi_ut_get_resource_end_tag(operand0, &end_tag);
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if (ACPI_FAILURE(status)) {
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return_ACPI_STATUS(status);
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}
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length0 = ACPI_PTR_DIFF(end_tag, operand0->buffer.pointer);
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/* Get the length of the second resource template */
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status = acpi_ut_get_resource_end_tag(operand1, &end_tag);
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if (ACPI_FAILURE(status)) {
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return_ACPI_STATUS(status);
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}
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length1 = ACPI_PTR_DIFF(end_tag, operand1->buffer.pointer);
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/* Combine both lengths, minimum size will be 2 for end_tag */
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new_length = length0 + length1 + sizeof(struct aml_resource_end_tag);
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/* Create a new buffer object for the result (with one end_tag) */
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return_desc = acpi_ut_create_buffer_object(new_length);
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if (!return_desc) {
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return_ACPI_STATUS(AE_NO_MEMORY);
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}
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/*
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* Copy the templates to the new buffer, 0 first, then 1 follows. One
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* end_tag descriptor is copied from Operand1.
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*/
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new_buf = return_desc->buffer.pointer;
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memcpy(new_buf, operand0->buffer.pointer, length0);
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memcpy(new_buf + length0, operand1->buffer.pointer, length1);
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/* Insert end_tag and set the checksum to zero, means "ignore checksum" */
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new_buf[new_length - 1] = 0;
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new_buf[new_length - 2] = ACPI_RESOURCE_NAME_END_TAG | 1;
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/* Return the completed resource template */
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*actual_return_desc = return_desc;
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return_ACPI_STATUS(AE_OK);
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}
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