0,0 → 1,294 |
/****************************************************************************** |
* |
* Module Name: nsarguments - Validation of args for ACPI predefined methods |
* |
*****************************************************************************/ |
|
/* |
* Copyright (C) 2000 - 2015, 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 "acnamesp.h" |
#include "acpredef.h" |
|
#define _COMPONENT ACPI_NAMESPACE |
ACPI_MODULE_NAME("nsarguments") |
|
/******************************************************************************* |
* |
* FUNCTION: acpi_ns_check_argument_types |
* |
* PARAMETERS: info - Method execution information block |
* |
* RETURN: None |
* |
* DESCRIPTION: Check the incoming argument count and all argument types |
* against the argument type list for a predefined name. |
* |
******************************************************************************/ |
void acpi_ns_check_argument_types(struct acpi_evaluate_info *info) |
{ |
u16 arg_type_list; |
u8 arg_count; |
u8 arg_type; |
u8 user_arg_type; |
u32 i; |
|
/* If not a predefined name, cannot typecheck args */ |
|
if (!info->predefined) { |
return; |
} |
|
arg_type_list = info->predefined->info.argument_list; |
arg_count = METHOD_GET_ARG_COUNT(arg_type_list); |
|
/* Typecheck all arguments */ |
|
for (i = 0; ((i < arg_count) && (i < info->param_count)); i++) { |
arg_type = METHOD_GET_NEXT_TYPE(arg_type_list); |
user_arg_type = info->parameters[i]->common.type; |
|
if (user_arg_type != arg_type) { |
ACPI_WARN_PREDEFINED((AE_INFO, info->full_pathname, |
ACPI_WARN_ALWAYS, |
"Argument #%u type mismatch - " |
"Found [%s], ACPI requires [%s]", |
(i + 1), |
acpi_ut_get_type_name |
(user_arg_type), |
acpi_ut_get_type_name(arg_type))); |
} |
} |
} |
|
/******************************************************************************* |
* |
* FUNCTION: acpi_ns_check_acpi_compliance |
* |
* PARAMETERS: pathname - Full pathname to the node (for error msgs) |
* node - Namespace node for the method/object |
* predefined - Pointer to entry in predefined name table |
* |
* RETURN: None |
* |
* DESCRIPTION: Check that the declared parameter count (in ASL/AML) for a |
* predefined name is what is expected (matches what is defined in |
* the ACPI specification for this predefined name.) |
* |
******************************************************************************/ |
|
void |
acpi_ns_check_acpi_compliance(char *pathname, |
struct acpi_namespace_node *node, |
const union acpi_predefined_info *predefined) |
{ |
u32 aml_param_count; |
u32 required_param_count; |
|
if (!predefined) { |
return; |
} |
|
/* Get the ACPI-required arg count from the predefined info table */ |
|
required_param_count = |
METHOD_GET_ARG_COUNT(predefined->info.argument_list); |
|
/* |
* If this object is not a control method, we can check if the ACPI |
* spec requires that it be a method. |
*/ |
if (node->type != ACPI_TYPE_METHOD) { |
if (required_param_count > 0) { |
|
/* Object requires args, must be implemented as a method */ |
|
ACPI_BIOS_ERROR_PREDEFINED((AE_INFO, pathname, |
ACPI_WARN_ALWAYS, |
"Object (%s) must be a control method with %u arguments", |
acpi_ut_get_type_name(node-> |
type), |
required_param_count)); |
} else if (!required_param_count |
&& !predefined->info.expected_btypes) { |
|
/* Object requires no args and no return value, must be a method */ |
|
ACPI_BIOS_ERROR_PREDEFINED((AE_INFO, pathname, |
ACPI_WARN_ALWAYS, |
"Object (%s) must be a control method " |
"with no arguments and no return value", |
acpi_ut_get_type_name(node-> |
type))); |
} |
|
return; |
} |
|
/* |
* This is a control method. |
* Check that the ASL/AML-defined parameter count for this method |
* matches the ACPI-required parameter count |
* |
* Some methods are allowed to have a "minimum" number of args (_SCP) |
* because their definition in ACPI has changed over time. |
* |
* Note: These are BIOS errors in the declaration of the object |
*/ |
aml_param_count = node->object->method.param_count; |
|
if (aml_param_count < required_param_count) { |
ACPI_BIOS_ERROR_PREDEFINED((AE_INFO, pathname, ACPI_WARN_ALWAYS, |
"Insufficient arguments - " |
"ASL declared %u, ACPI requires %u", |
aml_param_count, |
required_param_count)); |
} else if ((aml_param_count > required_param_count) |
&& !(predefined->info. |
argument_list & ARG_COUNT_IS_MINIMUM)) { |
ACPI_BIOS_ERROR_PREDEFINED((AE_INFO, pathname, ACPI_WARN_ALWAYS, |
"Excess arguments - " |
"ASL declared %u, ACPI requires %u", |
aml_param_count, |
required_param_count)); |
} |
} |
|
/******************************************************************************* |
* |
* FUNCTION: acpi_ns_check_argument_count |
* |
* PARAMETERS: pathname - Full pathname to the node (for error msgs) |
* node - Namespace node for the method/object |
* user_param_count - Number of args passed in by the caller |
* predefined - Pointer to entry in predefined name table |
* |
* RETURN: None |
* |
* DESCRIPTION: Check that incoming argument count matches the declared |
* parameter count (in the ASL/AML) for an object. |
* |
******************************************************************************/ |
|
void |
acpi_ns_check_argument_count(char *pathname, |
struct acpi_namespace_node *node, |
u32 user_param_count, |
const union acpi_predefined_info *predefined) |
{ |
u32 aml_param_count; |
u32 required_param_count; |
|
if (!predefined) { |
/* |
* Not a predefined name. Check the incoming user argument count |
* against the count that is specified in the method/object. |
*/ |
if (node->type != ACPI_TYPE_METHOD) { |
if (user_param_count) { |
ACPI_INFO_PREDEFINED((AE_INFO, pathname, |
ACPI_WARN_ALWAYS, |
"%u arguments were passed to a non-method ACPI object (%s)", |
user_param_count, |
acpi_ut_get_type_name |
(node->type))); |
} |
|
return; |
} |
|
/* |
* This is a control method. Check the parameter count. |
* We can only check the incoming argument count against the |
* argument count declared for the method in the ASL/AML. |
* |
* Emit a message if too few or too many arguments have been passed |
* by the caller. |
* |
* Note: Too many arguments will not cause the method to |
* fail. However, the method will fail if there are too few |
* arguments and the method attempts to use one of the missing ones. |
*/ |
aml_param_count = node->object->method.param_count; |
|
if (user_param_count < aml_param_count) { |
ACPI_WARN_PREDEFINED((AE_INFO, pathname, |
ACPI_WARN_ALWAYS, |
"Insufficient arguments - " |
"Caller passed %u, method requires %u", |
user_param_count, |
aml_param_count)); |
} else if (user_param_count > aml_param_count) { |
ACPI_INFO_PREDEFINED((AE_INFO, pathname, |
ACPI_WARN_ALWAYS, |
"Excess arguments - " |
"Caller passed %u, method requires %u", |
user_param_count, |
aml_param_count)); |
} |
|
return; |
} |
|
/* |
* This is a predefined name. Validate the user-supplied parameter |
* count against the ACPI specification. We don't validate against |
* the method itself because what is important here is that the |
* caller is in conformance with the spec. (The arg count for the |
* method was checked against the ACPI spec earlier.) |
* |
* Some methods are allowed to have a "minimum" number of args (_SCP) |
* because their definition in ACPI has changed over time. |
*/ |
required_param_count = |
METHOD_GET_ARG_COUNT(predefined->info.argument_list); |
|
if (user_param_count < required_param_count) { |
ACPI_WARN_PREDEFINED((AE_INFO, pathname, ACPI_WARN_ALWAYS, |
"Insufficient arguments - " |
"Caller passed %u, ACPI requires %u", |
user_param_count, required_param_count)); |
} else if ((user_param_count > required_param_count) && |
!(predefined->info.argument_list & ARG_COUNT_IS_MINIMUM)) { |
ACPI_INFO_PREDEFINED((AE_INFO, pathname, ACPI_WARN_ALWAYS, |
"Excess arguments - " |
"Caller passed %u, ACPI requires %u", |
user_param_count, required_param_count)); |
} |
} |