649 lines
17 KiB
C
649 lines
17 KiB
C
/******************************************************************************
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*
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* Module Name: psobject - Support for parse objects
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*
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*****************************************************************************/
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/*
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* Copyright (C) 2000 - 2013, Intel Corp.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions, and the following disclaimer,
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* without modification.
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* 2. Redistributions in binary form must reproduce at minimum a disclaimer
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* substantially similar to the "NO WARRANTY" disclaimer below
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* ("Disclaimer") and any redistribution must be conditioned upon
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* including a substantially similar Disclaimer requirement for further
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* binary redistribution.
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* 3. Neither the names of the above-listed copyright holders nor the names
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* of any contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* Alternatively, this software may be distributed under the terms of the
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* GNU General Public License ("GPL") version 2 as published by the Free
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* Software Foundation.
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*
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* NO WARRANTY
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGES.
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*/
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#include <acpi/acpi.h>
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#include "accommon.h"
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#include "acparser.h"
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#include "amlcode.h"
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#define _COMPONENT ACPI_PARSER
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ACPI_MODULE_NAME("psobject")
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/* Local prototypes */
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static acpi_status acpi_ps_get_aml_opcode(struct acpi_walk_state *walk_state);
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/*******************************************************************************
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*
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* FUNCTION: acpi_ps_get_aml_opcode
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*
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* PARAMETERS: walk_state - Current state
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*
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* RETURN: Status
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*
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* DESCRIPTION: Extract the next AML opcode from the input stream.
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*
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******************************************************************************/
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static acpi_status acpi_ps_get_aml_opcode(struct acpi_walk_state *walk_state)
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{
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ACPI_FUNCTION_TRACE_PTR(ps_get_aml_opcode, walk_state);
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walk_state->aml_offset =
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(u32)ACPI_PTR_DIFF(walk_state->parser_state.aml,
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walk_state->parser_state.aml_start);
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walk_state->opcode = acpi_ps_peek_opcode(&(walk_state->parser_state));
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/*
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* First cut to determine what we have found:
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* 1) A valid AML opcode
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* 2) A name string
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* 3) An unknown/invalid opcode
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*/
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walk_state->op_info = acpi_ps_get_opcode_info(walk_state->opcode);
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switch (walk_state->op_info->class) {
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case AML_CLASS_ASCII:
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case AML_CLASS_PREFIX:
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/*
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* Starts with a valid prefix or ASCII char, this is a name
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* string. Convert the bare name string to a namepath.
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*/
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walk_state->opcode = AML_INT_NAMEPATH_OP;
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walk_state->arg_types = ARGP_NAMESTRING;
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break;
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case AML_CLASS_UNKNOWN:
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/* The opcode is unrecognized. Complain and skip unknown opcodes */
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if (walk_state->pass_number == 2) {
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ACPI_ERROR((AE_INFO,
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"Unknown opcode 0x%.2X at table offset 0x%.4X, ignoring",
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walk_state->opcode,
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(u32)(walk_state->aml_offset +
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sizeof(struct acpi_table_header))));
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ACPI_DUMP_BUFFER((walk_state->parser_state.aml - 16),
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48);
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#ifdef ACPI_ASL_COMPILER
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/*
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* This is executed for the disassembler only. Output goes
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* to the disassembled ASL output file.
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*/
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acpi_os_printf
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("/*\nError: Unknown opcode 0x%.2X at table offset 0x%.4X, context:\n",
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walk_state->opcode,
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(u32)(walk_state->aml_offset +
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sizeof(struct acpi_table_header)));
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/* Dump the context surrounding the invalid opcode */
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acpi_ut_dump_buffer(((u8 *)walk_state->parser_state.
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aml - 16), 48, DB_BYTE_DISPLAY,
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(walk_state->aml_offset +
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sizeof(struct acpi_table_header) -
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16));
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acpi_os_printf(" */\n");
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#endif
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}
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/* Increment past one-byte or two-byte opcode */
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walk_state->parser_state.aml++;
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if (walk_state->opcode > 0xFF) { /* Can only happen if first byte is 0x5B */
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walk_state->parser_state.aml++;
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}
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return_ACPI_STATUS(AE_CTRL_PARSE_CONTINUE);
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default:
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/* Found opcode info, this is a normal opcode */
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walk_state->parser_state.aml +=
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acpi_ps_get_opcode_size(walk_state->opcode);
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walk_state->arg_types = walk_state->op_info->parse_args;
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break;
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}
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return_ACPI_STATUS(AE_OK);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ps_build_named_op
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*
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* PARAMETERS: walk_state - Current state
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* aml_op_start - Begin of named Op in AML
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* unnamed_op - Early Op (not a named Op)
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* op - Returned Op
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*
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* RETURN: Status
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*
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* DESCRIPTION: Parse a named Op
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*
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******************************************************************************/
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acpi_status
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acpi_ps_build_named_op(struct acpi_walk_state *walk_state,
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u8 *aml_op_start,
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union acpi_parse_object *unnamed_op,
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union acpi_parse_object **op)
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{
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acpi_status status = AE_OK;
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union acpi_parse_object *arg = NULL;
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ACPI_FUNCTION_TRACE_PTR(ps_build_named_op, walk_state);
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unnamed_op->common.value.arg = NULL;
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unnamed_op->common.arg_list_length = 0;
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unnamed_op->common.aml_opcode = walk_state->opcode;
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/*
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* Get and append arguments until we find the node that contains
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* the name (the type ARGP_NAME).
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*/
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while (GET_CURRENT_ARG_TYPE(walk_state->arg_types) &&
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(GET_CURRENT_ARG_TYPE(walk_state->arg_types) != ARGP_NAME)) {
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status =
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acpi_ps_get_next_arg(walk_state,
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&(walk_state->parser_state),
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GET_CURRENT_ARG_TYPE(walk_state->
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arg_types), &arg);
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if (ACPI_FAILURE(status)) {
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return_ACPI_STATUS(status);
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}
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acpi_ps_append_arg(unnamed_op, arg);
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INCREMENT_ARG_LIST(walk_state->arg_types);
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}
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/*
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* Make sure that we found a NAME and didn't run out of arguments
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*/
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if (!GET_CURRENT_ARG_TYPE(walk_state->arg_types)) {
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return_ACPI_STATUS(AE_AML_NO_OPERAND);
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}
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/* We know that this arg is a name, move to next arg */
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INCREMENT_ARG_LIST(walk_state->arg_types);
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/*
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* Find the object. This will either insert the object into
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* the namespace or simply look it up
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*/
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walk_state->op = NULL;
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status = walk_state->descending_callback(walk_state, op);
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if (ACPI_FAILURE(status)) {
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ACPI_EXCEPTION((AE_INFO, status, "During name lookup/catalog"));
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return_ACPI_STATUS(status);
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}
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if (!*op) {
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return_ACPI_STATUS(AE_CTRL_PARSE_CONTINUE);
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}
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status = acpi_ps_next_parse_state(walk_state, *op, status);
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if (ACPI_FAILURE(status)) {
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if (status == AE_CTRL_PENDING) {
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return_ACPI_STATUS(AE_CTRL_PARSE_PENDING);
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}
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return_ACPI_STATUS(status);
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}
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acpi_ps_append_arg(*op, unnamed_op->common.value.arg);
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if ((*op)->common.aml_opcode == AML_REGION_OP ||
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(*op)->common.aml_opcode == AML_DATA_REGION_OP) {
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/*
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* Defer final parsing of an operation_region body, because we don't
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* have enough info in the first pass to parse it correctly (i.e.,
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* there may be method calls within the term_arg elements of the body.)
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*
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* However, we must continue parsing because the opregion is not a
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* standalone package -- we don't know where the end is at this point.
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*
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* (Length is unknown until parse of the body complete)
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*/
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(*op)->named.data = aml_op_start;
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(*op)->named.length = 0;
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}
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return_ACPI_STATUS(AE_OK);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ps_create_op
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*
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* PARAMETERS: walk_state - Current state
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* aml_op_start - Op start in AML
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* new_op - Returned Op
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*
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* RETURN: Status
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*
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* DESCRIPTION: Get Op from AML
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*
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******************************************************************************/
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acpi_status
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acpi_ps_create_op(struct acpi_walk_state *walk_state,
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u8 *aml_op_start, union acpi_parse_object **new_op)
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{
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acpi_status status = AE_OK;
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union acpi_parse_object *op;
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union acpi_parse_object *named_op = NULL;
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union acpi_parse_object *parent_scope;
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u8 argument_count;
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const struct acpi_opcode_info *op_info;
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ACPI_FUNCTION_TRACE_PTR(ps_create_op, walk_state);
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status = acpi_ps_get_aml_opcode(walk_state);
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if (status == AE_CTRL_PARSE_CONTINUE) {
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return_ACPI_STATUS(AE_CTRL_PARSE_CONTINUE);
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}
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/* Create Op structure and append to parent's argument list */
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walk_state->op_info = acpi_ps_get_opcode_info(walk_state->opcode);
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op = acpi_ps_alloc_op(walk_state->opcode);
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if (!op) {
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return_ACPI_STATUS(AE_NO_MEMORY);
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}
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if (walk_state->op_info->flags & AML_NAMED) {
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status =
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acpi_ps_build_named_op(walk_state, aml_op_start, op,
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&named_op);
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acpi_ps_free_op(op);
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if (ACPI_FAILURE(status)) {
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return_ACPI_STATUS(status);
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}
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*new_op = named_op;
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return_ACPI_STATUS(AE_OK);
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}
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/* Not a named opcode, just allocate Op and append to parent */
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if (walk_state->op_info->flags & AML_CREATE) {
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/*
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* Backup to beginning of create_XXXfield declaration
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* body_length is unknown until we parse the body
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*/
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op->named.data = aml_op_start;
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op->named.length = 0;
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}
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if (walk_state->opcode == AML_BANK_FIELD_OP) {
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/*
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* Backup to beginning of bank_field declaration
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* body_length is unknown until we parse the body
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*/
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op->named.data = aml_op_start;
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op->named.length = 0;
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}
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parent_scope = acpi_ps_get_parent_scope(&(walk_state->parser_state));
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acpi_ps_append_arg(parent_scope, op);
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if (parent_scope) {
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op_info =
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acpi_ps_get_opcode_info(parent_scope->common.aml_opcode);
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if (op_info->flags & AML_HAS_TARGET) {
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argument_count =
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acpi_ps_get_argument_count(op_info->type);
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if (parent_scope->common.arg_list_length >
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argument_count) {
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op->common.flags |= ACPI_PARSEOP_TARGET;
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}
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} else if (parent_scope->common.aml_opcode == AML_INCREMENT_OP) {
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op->common.flags |= ACPI_PARSEOP_TARGET;
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}
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}
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if (walk_state->descending_callback != NULL) {
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/*
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* Find the object. This will either insert the object into
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* the namespace or simply look it up
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*/
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walk_state->op = *new_op = op;
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status = walk_state->descending_callback(walk_state, &op);
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status = acpi_ps_next_parse_state(walk_state, op, status);
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if (status == AE_CTRL_PENDING) {
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status = AE_CTRL_PARSE_PENDING;
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}
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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_ps_complete_op
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*
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* PARAMETERS: walk_state - Current state
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* op - Returned Op
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* status - Parse status before complete Op
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*
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* RETURN: Status
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*
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* DESCRIPTION: Complete Op
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*
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******************************************************************************/
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acpi_status
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acpi_ps_complete_op(struct acpi_walk_state *walk_state,
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union acpi_parse_object **op, acpi_status status)
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{
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acpi_status status2;
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ACPI_FUNCTION_TRACE_PTR(ps_complete_op, walk_state);
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/*
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* Finished one argument of the containing scope
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*/
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walk_state->parser_state.scope->parse_scope.arg_count--;
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/* Close this Op (will result in parse subtree deletion) */
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status2 = acpi_ps_complete_this_op(walk_state, *op);
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if (ACPI_FAILURE(status2)) {
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return_ACPI_STATUS(status2);
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}
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*op = NULL;
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switch (status) {
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case AE_OK:
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break;
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case AE_CTRL_TRANSFER:
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/* We are about to transfer to a called method */
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walk_state->prev_op = NULL;
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walk_state->prev_arg_types = walk_state->arg_types;
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return_ACPI_STATUS(status);
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case AE_CTRL_END:
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acpi_ps_pop_scope(&(walk_state->parser_state), op,
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&walk_state->arg_types,
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&walk_state->arg_count);
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if (*op) {
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walk_state->op = *op;
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walk_state->op_info =
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acpi_ps_get_opcode_info((*op)->common.aml_opcode);
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walk_state->opcode = (*op)->common.aml_opcode;
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status = walk_state->ascending_callback(walk_state);
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status =
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acpi_ps_next_parse_state(walk_state, *op, status);
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status2 = acpi_ps_complete_this_op(walk_state, *op);
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if (ACPI_FAILURE(status2)) {
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return_ACPI_STATUS(status2);
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}
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}
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status = AE_OK;
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break;
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case AE_CTRL_BREAK:
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case AE_CTRL_CONTINUE:
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/* Pop off scopes until we find the While */
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while (!(*op) || ((*op)->common.aml_opcode != AML_WHILE_OP)) {
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acpi_ps_pop_scope(&(walk_state->parser_state), op,
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&walk_state->arg_types,
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&walk_state->arg_count);
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}
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/* Close this iteration of the While loop */
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walk_state->op = *op;
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walk_state->op_info =
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acpi_ps_get_opcode_info((*op)->common.aml_opcode);
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walk_state->opcode = (*op)->common.aml_opcode;
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status = walk_state->ascending_callback(walk_state);
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status = acpi_ps_next_parse_state(walk_state, *op, status);
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status2 = acpi_ps_complete_this_op(walk_state, *op);
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if (ACPI_FAILURE(status2)) {
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return_ACPI_STATUS(status2);
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}
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status = AE_OK;
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break;
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case AE_CTRL_TERMINATE:
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/* Clean up */
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do {
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if (*op) {
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status2 =
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acpi_ps_complete_this_op(walk_state, *op);
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if (ACPI_FAILURE(status2)) {
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return_ACPI_STATUS(status2);
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}
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acpi_ut_delete_generic_state
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(acpi_ut_pop_generic_state
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(&walk_state->control_state));
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}
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acpi_ps_pop_scope(&(walk_state->parser_state), op,
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&walk_state->arg_types,
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&walk_state->arg_count);
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} while (*op);
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return_ACPI_STATUS(AE_OK);
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default: /* All other non-AE_OK status */
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do {
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if (*op) {
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status2 =
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acpi_ps_complete_this_op(walk_state, *op);
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if (ACPI_FAILURE(status2)) {
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return_ACPI_STATUS(status2);
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}
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}
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acpi_ps_pop_scope(&(walk_state->parser_state), op,
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&walk_state->arg_types,
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&walk_state->arg_count);
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} while (*op);
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#if 0
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/*
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* TBD: Cleanup parse ops on error
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*/
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if (*op == NULL) {
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acpi_ps_pop_scope(parser_state, op,
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&walk_state->arg_types,
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&walk_state->arg_count);
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}
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#endif
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walk_state->prev_op = NULL;
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walk_state->prev_arg_types = walk_state->arg_types;
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return_ACPI_STATUS(status);
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}
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/* This scope complete? */
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if (acpi_ps_has_completed_scope(&(walk_state->parser_state))) {
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acpi_ps_pop_scope(&(walk_state->parser_state), op,
|
|
&walk_state->arg_types,
|
|
&walk_state->arg_count);
|
|
ACPI_DEBUG_PRINT((ACPI_DB_PARSE, "Popped scope, Op=%p\n", *op));
|
|
} else {
|
|
*op = NULL;
|
|
}
|
|
|
|
return_ACPI_STATUS(AE_OK);
|
|
}
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_ps_complete_final_op
|
|
*
|
|
* PARAMETERS: walk_state - Current state
|
|
* op - Current Op
|
|
* status - Current parse status before complete last
|
|
* Op
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Complete last Op.
|
|
*
|
|
******************************************************************************/
|
|
|
|
acpi_status
|
|
acpi_ps_complete_final_op(struct acpi_walk_state *walk_state,
|
|
union acpi_parse_object *op, acpi_status status)
|
|
{
|
|
acpi_status status2;
|
|
|
|
ACPI_FUNCTION_TRACE_PTR(ps_complete_final_op, walk_state);
|
|
|
|
/*
|
|
* Complete the last Op (if not completed), and clear the scope stack.
|
|
* It is easily possible to end an AML "package" with an unbounded number
|
|
* of open scopes (such as when several ASL blocks are closed with
|
|
* sequential closing braces). We want to terminate each one cleanly.
|
|
*/
|
|
ACPI_DEBUG_PRINT((ACPI_DB_PARSE, "AML package complete at Op %p\n",
|
|
op));
|
|
do {
|
|
if (op) {
|
|
if (walk_state->ascending_callback != NULL) {
|
|
walk_state->op = op;
|
|
walk_state->op_info =
|
|
acpi_ps_get_opcode_info(op->common.
|
|
aml_opcode);
|
|
walk_state->opcode = op->common.aml_opcode;
|
|
|
|
status =
|
|
walk_state->ascending_callback(walk_state);
|
|
status =
|
|
acpi_ps_next_parse_state(walk_state, op,
|
|
status);
|
|
if (status == AE_CTRL_PENDING) {
|
|
status =
|
|
acpi_ps_complete_op(walk_state, &op,
|
|
AE_OK);
|
|
if (ACPI_FAILURE(status)) {
|
|
return_ACPI_STATUS(status);
|
|
}
|
|
}
|
|
|
|
if (status == AE_CTRL_TERMINATE) {
|
|
status = AE_OK;
|
|
|
|
/* Clean up */
|
|
do {
|
|
if (op) {
|
|
status2 =
|
|
acpi_ps_complete_this_op
|
|
(walk_state, op);
|
|
if (ACPI_FAILURE
|
|
(status2)) {
|
|
return_ACPI_STATUS
|
|
(status2);
|
|
}
|
|
}
|
|
|
|
acpi_ps_pop_scope(&
|
|
(walk_state->
|
|
parser_state),
|
|
&op,
|
|
&walk_state->
|
|
arg_types,
|
|
&walk_state->
|
|
arg_count);
|
|
|
|
} while (op);
|
|
|
|
return_ACPI_STATUS(status);
|
|
}
|
|
|
|
else if (ACPI_FAILURE(status)) {
|
|
|
|
/* First error is most important */
|
|
|
|
(void)
|
|
acpi_ps_complete_this_op(walk_state,
|
|
op);
|
|
return_ACPI_STATUS(status);
|
|
}
|
|
}
|
|
|
|
status2 = acpi_ps_complete_this_op(walk_state, op);
|
|
if (ACPI_FAILURE(status2)) {
|
|
return_ACPI_STATUS(status2);
|
|
}
|
|
}
|
|
|
|
acpi_ps_pop_scope(&(walk_state->parser_state), &op,
|
|
&walk_state->arg_types,
|
|
&walk_state->arg_count);
|
|
|
|
} while (op);
|
|
|
|
return_ACPI_STATUS(status);
|
|
}
|