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4441e55d50
This affects all ACPICA source code modules. ACPICA commit c570953c914437e621dd5f160f26ddf352e0d2f4 Link: https://github.com/acpica/acpica/commit/c570953c Signed-off-by: Bob Moore <robert.moore@intel.com> Signed-off-by: Erik Kaneda <erik.kaneda@intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
252 lines
6.6 KiB
C
252 lines
6.6 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: exoparg3 - AML execution - opcodes with 3 arguments
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*
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* Copyright (C) 2000 - 2021, 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 "acparser.h"
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#include "amlcode.h"
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#define _COMPONENT ACPI_EXECUTER
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ACPI_MODULE_NAME("exoparg3")
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/*!
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* Naming convention for AML interpreter execution routines.
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*
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* The routines that begin execution of AML opcodes are named with a common
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* convention based upon the number of arguments, the number of target operands,
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* and whether or not a value is returned:
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*
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* AcpiExOpcode_xA_yT_zR
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*
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* Where:
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*
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* xA - ARGUMENTS: The number of arguments (input operands) that are
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* required for this opcode type (1 through 6 args).
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* yT - TARGETS: The number of targets (output operands) that are required
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* for this opcode type (0, 1, or 2 targets).
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* zR - RETURN VALUE: Indicates whether this opcode type returns a value
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* as the function return (0 or 1).
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*
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* The AcpiExOpcode* functions are called via the Dispatcher component with
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* fully resolved operands.
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!*/
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/*******************************************************************************
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*
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* FUNCTION: acpi_ex_opcode_3A_0T_0R
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*
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* PARAMETERS: walk_state - Current walk state
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*
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* RETURN: Status
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*
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* DESCRIPTION: Execute Triadic operator (3 operands)
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*
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******************************************************************************/
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acpi_status acpi_ex_opcode_3A_0T_0R(struct acpi_walk_state *walk_state)
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{
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union acpi_operand_object **operand = &walk_state->operands[0];
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struct acpi_signal_fatal_info *fatal;
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acpi_status status = AE_OK;
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ACPI_FUNCTION_TRACE_STR(ex_opcode_3A_0T_0R,
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acpi_ps_get_opcode_name(walk_state->opcode));
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switch (walk_state->opcode) {
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case AML_FATAL_OP: /* Fatal (fatal_type fatal_code fatal_arg) */
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ACPI_DEBUG_PRINT((ACPI_DB_INFO,
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"FatalOp: Type %X Code %X Arg %X "
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"<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<\n",
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(u32)operand[0]->integer.value,
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(u32)operand[1]->integer.value,
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(u32)operand[2]->integer.value));
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fatal = ACPI_ALLOCATE(sizeof(struct acpi_signal_fatal_info));
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if (fatal) {
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fatal->type = (u32) operand[0]->integer.value;
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fatal->code = (u32) operand[1]->integer.value;
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fatal->argument = (u32) operand[2]->integer.value;
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}
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/* Always signal the OS! */
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status = acpi_os_signal(ACPI_SIGNAL_FATAL, fatal);
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/* Might return while OS is shutting down, just continue */
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ACPI_FREE(fatal);
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goto cleanup;
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case AML_EXTERNAL_OP:
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/*
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* If the interpreter sees this opcode, just ignore it. The External
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* op is intended for use by disassemblers in order to properly
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* disassemble control method invocations. The opcode or group of
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* opcodes should be surrounded by an "if (0)" clause to ensure that
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* AML interpreters never see the opcode. Thus, something is
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* wrong if an external opcode ever gets here.
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*/
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ACPI_ERROR((AE_INFO, "Executed External Op"));
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status = AE_OK;
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goto cleanup;
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default:
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ACPI_ERROR((AE_INFO, "Unknown AML opcode 0x%X",
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walk_state->opcode));
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status = AE_AML_BAD_OPCODE;
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goto cleanup;
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}
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cleanup:
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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_opcode_3A_1T_1R
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*
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* PARAMETERS: walk_state - Current walk state
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*
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* RETURN: Status
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*
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* DESCRIPTION: Execute Triadic operator (3 operands)
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*
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******************************************************************************/
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acpi_status acpi_ex_opcode_3A_1T_1R(struct acpi_walk_state *walk_state)
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{
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union acpi_operand_object **operand = &walk_state->operands[0];
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union acpi_operand_object *return_desc = NULL;
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char *buffer = NULL;
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acpi_status status = AE_OK;
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u64 index;
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acpi_size length;
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ACPI_FUNCTION_TRACE_STR(ex_opcode_3A_1T_1R,
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acpi_ps_get_opcode_name(walk_state->opcode));
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switch (walk_state->opcode) {
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case AML_MID_OP: /* Mid (Source[0], Index[1], Length[2], Result[3]) */
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/*
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* Create the return object. The Source operand is guaranteed to be
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* either a String or a Buffer, so just use its type.
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*/
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return_desc = acpi_ut_create_internal_object((operand[0])->
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common.type);
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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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/* Get the Integer values from the objects */
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index = operand[1]->integer.value;
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length = (acpi_size)operand[2]->integer.value;
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/*
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* If the index is beyond the length of the String/Buffer, or if the
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* requested length is zero, return a zero-length String/Buffer
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*/
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if (index >= operand[0]->string.length) {
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length = 0;
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}
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/* Truncate request if larger than the actual String/Buffer */
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else if ((index + length) > operand[0]->string.length) {
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length =
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(acpi_size)operand[0]->string.length -
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(acpi_size)index;
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}
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/* Strings always have a sub-pointer, not so for buffers */
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switch ((operand[0])->common.type) {
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case ACPI_TYPE_STRING:
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/* Always allocate a new buffer for the String */
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buffer = ACPI_ALLOCATE_ZEROED((acpi_size)length + 1);
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if (!buffer) {
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status = AE_NO_MEMORY;
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goto cleanup;
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}
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break;
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case ACPI_TYPE_BUFFER:
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/* If the requested length is zero, don't allocate a buffer */
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if (length > 0) {
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/* Allocate a new buffer for the Buffer */
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buffer = ACPI_ALLOCATE_ZEROED(length);
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if (!buffer) {
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status = AE_NO_MEMORY;
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goto cleanup;
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}
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}
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break;
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default: /* Should not happen */
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status = AE_AML_OPERAND_TYPE;
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goto cleanup;
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}
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if (buffer) {
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/* We have a buffer, copy the portion requested */
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memcpy(buffer,
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operand[0]->string.pointer + index, length);
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}
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/* Set the length of the new String/Buffer */
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return_desc->string.pointer = buffer;
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return_desc->string.length = (u32) length;
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/* Mark buffer initialized */
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return_desc->buffer.flags |= AOPOBJ_DATA_VALID;
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break;
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default:
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ACPI_ERROR((AE_INFO, "Unknown AML opcode 0x%X",
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walk_state->opcode));
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status = AE_AML_BAD_OPCODE;
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goto cleanup;
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}
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/* Store the result in the target */
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status = acpi_ex_store(return_desc, operand[3], walk_state);
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cleanup:
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/* Delete return object on error */
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if (ACPI_FAILURE(status) || walk_state->result_obj) {
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acpi_ut_remove_reference(return_desc);
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walk_state->result_obj = NULL;
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} else {
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/* Set the return object and exit */
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walk_state->result_obj = return_desc;
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}
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return_ACPI_STATUS(status);
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}
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