Quelle nsarguments.c
Sprache: C
// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
/******************************************************************************
*
* Module Name : nsarguments - Validation of args for ACPI predefined methods
*
* Copyright ( C ) 2000 - 2025 , Intel Corp .
*
*****************************************************************************/
#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 , because
* we have no idea what argument types are expected .
* Also , ignore typecheck if warnings / errors if this method
* has already been evaluated at least once - - in order
* to suppress repetitive messages .
*/
if (!info->predefined || (info->node->flags & ANOBJ_EVALUATED)) {
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;
/* No typechecking for ACPI_TYPE_ANY */
if ((user_arg_type != arg_type) && (arg_type != ACPI_TYPE_ANY)) {
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)));
/* Prevent any additional typechecking for this method */
info->node->flags |= ANOBJ_EVALUATED;
}
}
}
/*******************************************************************************
*
* 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 || (node->flags & ANOBJ_EVALUATED)) {
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 (node->flags & ANOBJ_EVALUATED) {
return ;
}
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));
}
}
Messung V0.5 in Prozent C=95 H=94 G=94
¤ Dauer der Verarbeitung: 0.10 Sekunden
(vorverarbeitet am 2026-09-27)
¤
*© Formatika GbR, Deutschland
2026-10-10
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