/****************************************************************************** * * Module Name: exoparg3 - AML execution - opcodes with 3 arguments * *****************************************************************************/ /* * Copyright (C) 2000 - 2012, Intel Corp. * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions, and the following disclaimer, * without modification. * 2. Redistributions in binary form must reproduce at minimum a disclaimer * substantially similar to the "NO WARRANTY" disclaimer below * ("Disclaimer") and any redistribution must be conditioned upon * including a substantially similar Disclaimer requirement for further * binary redistribution. * 3. Neither the names of the above-listed copyright holders nor the names * of any contributors may be used to endorse or promote products derived * from this software without specific prior written permission. * * Alternatively, this software may be distributed under the terms of the * GNU General Public License ("GPL") version 2 as published by the Free * Software Foundation. * * NO WARRANTY * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGES. */ #include <acpi/acpi.h> #include "accommon.h" #include "acinterp.h" #include "acparser.h" #include "amlcode.h" #define _COMPONENT ACPI_EXECUTER ACPI_MODULE_NAME("exoparg3") /*! * Naming convention for AML interpreter execution routines. * * The routines that begin execution of AML opcodes are named with a common * convention based upon the number of arguments, the number of target operands, * and whether or not a value is returned: * * AcpiExOpcode_xA_yT_zR * * Where: * * xA - ARGUMENTS: The number of arguments (input operands) that are * required for this opcode type (1 through 6 args). * yT - TARGETS: The number of targets (output operands) that are required * for this opcode type (0, 1, or 2 targets). * zR - RETURN VALUE: Indicates whether this opcode type returns a value * as the function return (0 or 1). * * The AcpiExOpcode* functions are called via the Dispatcher component with * fully resolved operands. !*/ /******************************************************************************* * * FUNCTION: acpi_ex_opcode_3A_0T_0R * * PARAMETERS: walk_state - Current walk state * * RETURN: Status * * DESCRIPTION: Execute Triadic operator (3 operands) * ******************************************************************************/ acpi_status acpi_ex_opcode_3A_0T_0R(struct acpi_walk_state *walk_state) { union acpi_operand_object **operand = &walk_state->operands[0]; struct acpi_signal_fatal_info *fatal; acpi_status status = AE_OK; ACPI_FUNCTION_TRACE_STR(ex_opcode_3A_0T_0R, acpi_ps_get_opcode_name(walk_state->opcode)); switch (walk_state->opcode) { case AML_FATAL_OP: /* Fatal (fatal_type fatal_code fatal_arg) */ ACPI_DEBUG_PRINT((ACPI_DB_INFO, "FatalOp: Type %X Code %X Arg %X <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<\n", (u32) operand[0]->integer.value, (u32) operand[1]->integer.value, (u32) operand[2]->integer.value)); fatal = ACPI_ALLOCATE(sizeof(struct acpi_signal_fatal_info)); if (fatal) { fatal->type = (u32) operand[0]->integer.value; fatal->code = (u32) operand[1]->integer.value; fatal->argument = (u32) operand[2]->integer.value; } /* Always signal the OS! */ status = acpi_os_signal(ACPI_SIGNAL_FATAL, fatal); /* Might return while OS is shutting down, just continue */ ACPI_FREE(fatal); break; default: ACPI_ERROR((AE_INFO, "Unknown AML opcode 0x%X", walk_state->opcode)); status = AE_AML_BAD_OPCODE; goto cleanup; } cleanup: return_ACPI_STATUS(status); } /******************************************************************************* * * FUNCTION: acpi_ex_opcode_3A_1T_1R * * PARAMETERS: walk_state - Current walk state * * RETURN: Status * * DESCRIPTION: Execute Triadic operator (3 operands) * ******************************************************************************/ acpi_status acpi_ex_opcode_3A_1T_1R(struct acpi_walk_state *walk_state) { union acpi_operand_object **operand = &walk_state->operands[0]; union acpi_operand_object *return_desc = NULL; char *buffer = NULL; acpi_status status = AE_OK; u64 index; acpi_size length; ACPI_FUNCTION_TRACE_STR(ex_opcode_3A_1T_1R, acpi_ps_get_opcode_name(walk_state->opcode)); switch (walk_state->opcode) { case AML_MID_OP: /* Mid (Source[0], Index[1], Length[2], Result[3]) */ /* * Create the return object. The Source operand is guaranteed to be * either a String or a Buffer, so just use its type. */ return_desc = acpi_ut_create_internal_object((operand[0])-> common.type); if (!return_desc) { status = AE_NO_MEMORY; goto cleanup; } /* Get the Integer values from the objects */ index = operand[1]->integer.value; length = (acpi_size) operand[2]->integer.value; /* * If the index is beyond the length of the String/Buffer, or if the * requested length is zero, return a zero-length String/Buffer */ if (index >= operand[0]->string.length) { length = 0; } /* Truncate request if larger than the actual String/Buffer */ else if ((index + length) > operand[0]->string.length) { length = (acpi_size) operand[0]->string.length - (acpi_size) index; } /* Strings always have a sub-pointer, not so for buffers */ switch ((operand[0])->common.type) { case ACPI_TYPE_STRING: /* Always allocate a new buffer for the String */ buffer = ACPI_ALLOCATE_ZEROED((acpi_size) length + 1); if (!buffer) { status = AE_NO_MEMORY; goto cleanup; } break; case ACPI_TYPE_BUFFER: /* If the requested length is zero, don't allocate a buffer */ if (length > 0) { /* Allocate a new buffer for the Buffer */ buffer = ACPI_ALLOCATE_ZEROED(length); if (!buffer) { status = AE_NO_MEMORY; goto cleanup; } } break; default: /* Should not happen */ status = AE_AML_OPERAND_TYPE; goto cleanup; } if (buffer) { /* We have a buffer, copy the portion requested */ ACPI_MEMCPY(buffer, operand[0]->string.pointer + index, length); } /* Set the length of the new String/Buffer */ return_desc->string.pointer = buffer; return_desc->string.length = (u32) length; /* Mark buffer initialized */ return_desc->buffer.flags |= AOPOBJ_DATA_VALID; break; default: ACPI_ERROR((AE_INFO, "Unknown AML opcode 0x%X", walk_state->opcode)); status = AE_AML_BAD_OPCODE; goto cleanup; } /* Store the result in the target */ status = acpi_ex_store(return_desc, operand[3], walk_state); cleanup: /* Delete return object on error */ if (ACPI_FAILURE(status) || walk_state->result_obj) { acpi_ut_remove_reference(return_desc); walk_state->result_obj = NULL; } /* Set the return object and exit */ else { walk_state->result_obj = return_desc; } return_ACPI_STATUS(status); }