44f6c01242
Fixed three cases in the interpreter where an "index" argument to an ASL function was still (internally) 32 bits instead of the required 64 bits. This was the Index argument to the Index, Mid, and Match operators. The "strupr" function is now permanently local (acpi_ut_strupr), since this is not a POSIX-defined function and not present in most kernel-level C libraries. References to the C library strupr function have been removed from the headers. Completed the deployment of static functions/prototypes. All prototypes with the static attribute have been moved from the headers to the owning C file. ACPICA 20050329 from Bob Moore An error is now generated if an attempt is made to create a Buffer Field of length zero (A CreateField with a length operand of zero.) The interpreter now issues a warning whenever executable code at the module level is detected during ACPI table load. This will give some idea of the prevalence of this type of code. Implemented support for references to named objects (other than control methods) within package objects. Enhanced package object output for the debug object. Package objects are now completely dumped, showing all elements. Enhanced miscellaneous object output for the debug object. Any object can now be written to the debug object (for example, a device object can be written, and the type of the object will be displayed.) The "static" qualifier has been added to all local functions across the core subsystem. The number of "long" lines (> 80 chars) within the source has been significantly reduced, by about 1/3. Cleaned up all header files to ensure that all CA/iASL functions are prototyped (even static functions) and the formatting is consistent. Two new header files have been added, acopcode.h and acnames.h. Removed several obsolete functions that were no longer used. Signed-off-by: Len Brown <len.brown@intel.com>
517 lines
16 KiB
C
517 lines
16 KiB
C
/*******************************************************************************
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*
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* Module Name: nseval - Object evaluation interfaces -- includes control
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* method lookup and execution.
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*
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******************************************************************************/
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/*
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* Copyright (C) 2000 - 2005, R. Byron Moore
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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 <acpi/acparser.h>
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#include <acpi/acinterp.h>
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#include <acpi/acnamesp.h>
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#define _COMPONENT ACPI_NAMESPACE
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ACPI_MODULE_NAME ("nseval")
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/* Local prototypes */
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static acpi_status
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acpi_ns_execute_control_method (
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struct acpi_parameter_info *info);
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static acpi_status
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acpi_ns_get_object_value (
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struct acpi_parameter_info *info);
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/*******************************************************************************
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*
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* FUNCTION: acpi_ns_evaluate_relative
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*
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* PARAMETERS: Pathname - Name of method to execute, If NULL, the
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* handle is the object to execute
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* Info - Method info block, contains:
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* return_object - Where to put method's return value (if
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* any). If NULL, no value is returned.
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* Params - List of parameters to pass to the method,
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* terminated by NULL. Params itself may be
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* NULL if no parameters are being passed.
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*
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* RETURN: Status
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*
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* DESCRIPTION: Evaluate the object or find and execute the requested method
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*
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* MUTEX: Locks Namespace
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*
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******************************************************************************/
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acpi_status
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acpi_ns_evaluate_relative (
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char *pathname,
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struct acpi_parameter_info *info)
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{
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acpi_status status;
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struct acpi_namespace_node *node = NULL;
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union acpi_generic_state *scope_info;
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char *internal_path = NULL;
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ACPI_FUNCTION_TRACE ("ns_evaluate_relative");
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/*
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* Must have a valid object handle
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*/
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if (!info || !info->node) {
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return_ACPI_STATUS (AE_BAD_PARAMETER);
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}
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/* Build an internal name string for the method */
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status = acpi_ns_internalize_name (pathname, &internal_path);
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if (ACPI_FAILURE (status)) {
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return_ACPI_STATUS (status);
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}
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scope_info = acpi_ut_create_generic_state ();
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if (!scope_info) {
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goto cleanup1;
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}
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/* Get the prefix handle and Node */
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status = acpi_ut_acquire_mutex (ACPI_MTX_NAMESPACE);
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if (ACPI_FAILURE (status)) {
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goto cleanup;
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}
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info->node = acpi_ns_map_handle_to_node (info->node);
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if (!info->node) {
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(void) acpi_ut_release_mutex (ACPI_MTX_NAMESPACE);
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status = AE_BAD_PARAMETER;
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goto cleanup;
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}
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/* Lookup the name in the namespace */
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scope_info->scope.node = info->node;
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status = acpi_ns_lookup (scope_info, internal_path, ACPI_TYPE_ANY,
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ACPI_IMODE_EXECUTE, ACPI_NS_NO_UPSEARCH, NULL,
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&node);
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(void) acpi_ut_release_mutex (ACPI_MTX_NAMESPACE);
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if (ACPI_FAILURE (status)) {
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ACPI_DEBUG_PRINT ((ACPI_DB_NAMES, "Object [%s] not found [%s]\n",
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pathname, acpi_format_exception (status)));
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goto cleanup;
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}
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/*
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* Now that we have a handle to the object, we can attempt to evaluate it.
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*/
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ACPI_DEBUG_PRINT ((ACPI_DB_NAMES, "%s [%p] Value %p\n",
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pathname, node, acpi_ns_get_attached_object (node)));
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info->node = node;
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status = acpi_ns_evaluate_by_handle (info);
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ACPI_DEBUG_PRINT ((ACPI_DB_NAMES, "*** Completed eval of object %s ***\n",
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pathname));
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cleanup:
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acpi_ut_delete_generic_state (scope_info);
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cleanup1:
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ACPI_MEM_FREE (internal_path);
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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_ns_evaluate_by_name
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*
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* PARAMETERS: Pathname - Fully qualified pathname to the object
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* Info - Method info block, contains:
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* return_object - Where to put method's return value (if
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* any). If NULL, no value is returned.
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* Params - List of parameters to pass to the method,
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* terminated by NULL. Params itself may be
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* NULL if no parameters are being passed.
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*
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* RETURN: Status
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*
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* DESCRIPTION: Evaluate the object or rind and execute the requested method
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* passing the given parameters
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*
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* MUTEX: Locks Namespace
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*
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******************************************************************************/
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acpi_status
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acpi_ns_evaluate_by_name (
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char *pathname,
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struct acpi_parameter_info *info)
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{
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acpi_status status;
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char *internal_path = NULL;
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ACPI_FUNCTION_TRACE ("ns_evaluate_by_name");
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/* Build an internal name string for the method */
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status = acpi_ns_internalize_name (pathname, &internal_path);
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if (ACPI_FAILURE (status)) {
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return_ACPI_STATUS (status);
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}
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status = acpi_ut_acquire_mutex (ACPI_MTX_NAMESPACE);
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if (ACPI_FAILURE (status)) {
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goto cleanup;
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}
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/* Lookup the name in the namespace */
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status = acpi_ns_lookup (NULL, internal_path, ACPI_TYPE_ANY,
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ACPI_IMODE_EXECUTE, ACPI_NS_NO_UPSEARCH, NULL,
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&info->node);
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(void) acpi_ut_release_mutex (ACPI_MTX_NAMESPACE);
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if (ACPI_FAILURE (status)) {
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ACPI_DEBUG_PRINT ((ACPI_DB_NAMES,
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"Object at [%s] was not found, status=%.4X\n",
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pathname, status));
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goto cleanup;
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}
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/*
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* Now that we have a handle to the object, we can attempt to evaluate it.
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*/
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ACPI_DEBUG_PRINT ((ACPI_DB_NAMES, "%s [%p] Value %p\n",
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pathname, info->node, acpi_ns_get_attached_object (info->node)));
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status = acpi_ns_evaluate_by_handle (info);
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ACPI_DEBUG_PRINT ((ACPI_DB_NAMES, "*** Completed eval of object %s ***\n",
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pathname));
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cleanup:
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/* Cleanup */
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if (internal_path) {
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ACPI_MEM_FREE (internal_path);
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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_ns_evaluate_by_handle
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*
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* PARAMETERS: Info - Method info block, contains:
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* Node - Method/Object Node to execute
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* Parameters - List of parameters to pass to the method,
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* terminated by NULL. Params itself may be
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* NULL if no parameters are being passed.
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* return_object - Where to put method's return value (if
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* any). If NULL, no value is returned.
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* parameter_type - Type of Parameter list
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* return_object - Where to put method's return value (if
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* any). If NULL, no value is returned.
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*
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* RETURN: Status
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*
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* DESCRIPTION: Evaluate object or execute the requested method passing the
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* given parameters
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*
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* MUTEX: Locks Namespace
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*
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******************************************************************************/
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acpi_status
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acpi_ns_evaluate_by_handle (
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struct acpi_parameter_info *info)
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{
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acpi_status status;
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ACPI_FUNCTION_TRACE ("ns_evaluate_by_handle");
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/* Check if namespace has been initialized */
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if (!acpi_gbl_root_node) {
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return_ACPI_STATUS (AE_NO_NAMESPACE);
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}
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/* Parameter Validation */
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if (!info) {
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return_ACPI_STATUS (AE_BAD_PARAMETER);
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}
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/* Initialize the return value to an invalid object */
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info->return_object = NULL;
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/* Get the prefix handle and Node */
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status = acpi_ut_acquire_mutex (ACPI_MTX_NAMESPACE);
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if (ACPI_FAILURE (status)) {
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return_ACPI_STATUS (status);
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}
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info->node = acpi_ns_map_handle_to_node (info->node);
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if (!info->node) {
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(void) acpi_ut_release_mutex (ACPI_MTX_NAMESPACE);
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return_ACPI_STATUS (AE_BAD_PARAMETER);
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}
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/*
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* For a method alias, we must grab the actual method node so that proper
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* scoping context will be established before execution.
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*/
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if (acpi_ns_get_type (info->node) == ACPI_TYPE_LOCAL_METHOD_ALIAS) {
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info->node = ACPI_CAST_PTR (struct acpi_namespace_node, info->node->object);
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}
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/*
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* Two major cases here:
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* 1) The object is an actual control method -- execute it.
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* 2) The object is not a method -- just return it's current value
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*
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* In both cases, the namespace is unlocked by the acpi_ns* procedure
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*/
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if (acpi_ns_get_type (info->node) == ACPI_TYPE_METHOD) {
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/*
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* Case 1) We have an actual control method to execute
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*/
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status = acpi_ns_execute_control_method (info);
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}
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else {
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/*
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* Case 2) Object is NOT a method, just return its current value
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*/
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status = acpi_ns_get_object_value (info);
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}
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/*
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* Check if there is a return value on the stack that must be dealt with
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*/
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if (status == AE_CTRL_RETURN_VALUE) {
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/* Map AE_CTRL_RETURN_VALUE to AE_OK, we are done with it */
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status = AE_OK;
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}
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/*
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* Namespace was unlocked by the handling acpi_ns* function, so we
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* just return
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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_ns_execute_control_method
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*
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* PARAMETERS: Info - Method info block, contains:
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* Node - Method Node to execute
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* Parameters - List of parameters to pass to the method,
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* terminated by NULL. Params itself may be
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* NULL if no parameters are being passed.
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* return_object - Where to put method's return value (if
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* any). If NULL, no value is returned.
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* parameter_type - Type of Parameter list
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* return_object - Where to put method's return value (if
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* any). If NULL, no value is returned.
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*
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* RETURN: Status
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*
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* DESCRIPTION: Execute the requested method passing the given parameters
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*
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* MUTEX: Assumes namespace is locked
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*
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******************************************************************************/
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static acpi_status
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acpi_ns_execute_control_method (
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struct acpi_parameter_info *info)
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{
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acpi_status status;
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union acpi_operand_object *obj_desc;
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ACPI_FUNCTION_TRACE ("ns_execute_control_method");
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/* Verify that there is a method associated with this object */
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obj_desc = acpi_ns_get_attached_object (info->node);
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if (!obj_desc) {
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ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "No attached method object\n"));
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(void) acpi_ut_release_mutex (ACPI_MTX_NAMESPACE);
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return_ACPI_STATUS (AE_NULL_OBJECT);
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}
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ACPI_DUMP_PATHNAME (info->node, "Execute Method:",
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ACPI_LV_INFO, _COMPONENT);
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ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Method at AML address %p Length %X\n",
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obj_desc->method.aml_start + 1, obj_desc->method.aml_length - 1));
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/*
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* Unlock the namespace before execution. This allows namespace access
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* via the external Acpi* interfaces while a method is being executed.
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* However, any namespace deletion must acquire both the namespace and
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* interpreter locks to ensure that no thread is using the portion of the
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* namespace that is being deleted.
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*/
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status = acpi_ut_release_mutex (ACPI_MTX_NAMESPACE);
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if (ACPI_FAILURE (status)) {
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return_ACPI_STATUS (status);
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}
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/*
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* Execute the method via the interpreter. The interpreter is locked
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* here before calling into the AML parser
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*/
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status = acpi_ex_enter_interpreter ();
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if (ACPI_FAILURE (status)) {
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return_ACPI_STATUS (status);
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}
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status = acpi_psx_execute (info);
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acpi_ex_exit_interpreter ();
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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_ns_get_object_value
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*
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* PARAMETERS: Info - Method info block, contains:
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* Node - Object's NS node
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* return_object - Where to put object value (if
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* any). If NULL, no value is returned.
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*
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* RETURN: Status
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*
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* DESCRIPTION: Return the current value of the object
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*
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* MUTEX: Assumes namespace is locked, leaves namespace unlocked
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*
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******************************************************************************/
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static acpi_status
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acpi_ns_get_object_value (
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struct acpi_parameter_info *info)
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{
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acpi_status status = AE_OK;
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struct acpi_namespace_node *resolved_node = info->node;
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ACPI_FUNCTION_TRACE ("ns_get_object_value");
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/*
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* Objects require additional resolution steps (e.g., the Node may be a
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* field that must be read, etc.) -- we can't just grab the object out of
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* the node.
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*/
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/*
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* Use resolve_node_to_value() to get the associated value. This call always
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* deletes obj_desc (allocated above).
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*
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* NOTE: we can get away with passing in NULL for a walk state because
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* obj_desc is guaranteed to not be a reference to either a method local or
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* a method argument (because this interface can only be called from the
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* acpi_evaluate external interface, never called from a running method.)
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*
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* Even though we do not directly invoke the interpreter for this, we must
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* enter it because we could access an opregion. The opregion access code
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* assumes that the interpreter is locked.
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*
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* We must release the namespace lock before entering the intepreter.
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*/
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status = acpi_ut_release_mutex (ACPI_MTX_NAMESPACE);
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if (ACPI_FAILURE (status)) {
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return_ACPI_STATUS (status);
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}
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status = acpi_ex_enter_interpreter ();
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if (ACPI_SUCCESS (status)) {
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status = acpi_ex_resolve_node_to_value (&resolved_node, NULL);
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/*
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* If acpi_ex_resolve_node_to_value() succeeded, the return value was placed
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* in resolved_node.
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*/
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acpi_ex_exit_interpreter ();
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if (ACPI_SUCCESS (status)) {
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status = AE_CTRL_RETURN_VALUE;
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info->return_object = ACPI_CAST_PTR
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(union acpi_operand_object, resolved_node);
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ACPI_DEBUG_PRINT ((ACPI_DB_NAMES, "Returning object %p [%s]\n",
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info->return_object,
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acpi_ut_get_object_type_name (info->return_object)));
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}
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}
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/* Namespace is unlocked */
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return_ACPI_STATUS (status);
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}
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