1 /******************************************************************************
3 * Module Name: nsarguments - Validation of args for ACPI predefined methods
5 *****************************************************************************/
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20 * including a substantially similar Disclaimer requirement for further
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23 * of any contributors may be used to endorse or promote products derived
24 * from this software without specific prior written permission.
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50 #define _COMPONENT ACPI_NAMESPACE
51 ACPI_MODULE_NAME ("nsarguments")
54 /*******************************************************************************
56 * FUNCTION: AcpiNsCheckArgumentTypes
58 * PARAMETERS: Info - Method execution information block
62 * DESCRIPTION: Check the incoming argument count and all argument types
63 * against the argument type list for a predefined name.
65 ******************************************************************************/
68 AcpiNsCheckArgumentTypes (
69 ACPI_EVALUATE_INFO
*Info
)
78 /* If not a predefined name, cannot typecheck args */
80 if (!Info
->Predefined
)
85 ArgTypeList
= Info
->Predefined
->Info
.ArgumentList
;
86 ArgCount
= METHOD_GET_ARG_COUNT (ArgTypeList
);
88 /* Typecheck all arguments */
90 for (i
= 0; ((i
< ArgCount
) && (i
< Info
->ParamCount
)); i
++)
92 ArgType
= METHOD_GET_NEXT_TYPE (ArgTypeList
);
93 UserArgType
= Info
->Parameters
[i
]->Common
.Type
;
95 if (UserArgType
!= ArgType
)
97 ACPI_WARN_PREDEFINED ((AE_INFO
, Info
->FullPathname
, ACPI_WARN_ALWAYS
,
98 "Argument #%u type mismatch - "
99 "Found [%s], ACPI requires [%s]", (i
+ 1),
100 AcpiUtGetTypeName (UserArgType
),
101 AcpiUtGetTypeName (ArgType
)));
107 /*******************************************************************************
109 * FUNCTION: AcpiNsCheckAcpiCompliance
111 * PARAMETERS: Pathname - Full pathname to the node (for error msgs)
112 * Node - Namespace node for the method/object
113 * Predefined - Pointer to entry in predefined name table
117 * DESCRIPTION: Check that the declared parameter count (in ASL/AML) for a
118 * predefined name is what is expected (matches what is defined in
119 * the ACPI specification for this predefined name.)
121 ******************************************************************************/
124 AcpiNsCheckAcpiCompliance (
126 ACPI_NAMESPACE_NODE
*Node
,
127 const ACPI_PREDEFINED_INFO
*Predefined
)
129 UINT32 AmlParamCount
;
130 UINT32 RequiredParamCount
;
138 /* Get the ACPI-required arg count from the predefined info table */
141 METHOD_GET_ARG_COUNT (Predefined
->Info
.ArgumentList
);
144 * If this object is not a control method, we can check if the ACPI
145 * spec requires that it be a method.
147 if (Node
->Type
!= ACPI_TYPE_METHOD
)
149 if (RequiredParamCount
> 0)
151 /* Object requires args, must be implemented as a method */
153 ACPI_BIOS_ERROR_PREDEFINED ((AE_INFO
, Pathname
, ACPI_WARN_ALWAYS
,
154 "Object (%s) must be a control method with %u arguments",
155 AcpiUtGetTypeName (Node
->Type
), RequiredParamCount
));
157 else if (!RequiredParamCount
&& !Predefined
->Info
.ExpectedBtypes
)
159 /* Object requires no args and no return value, must be a method */
161 ACPI_BIOS_ERROR_PREDEFINED ((AE_INFO
, Pathname
, ACPI_WARN_ALWAYS
,
162 "Object (%s) must be a control method "
163 "with no arguments and no return value",
164 AcpiUtGetTypeName (Node
->Type
)));
171 * This is a control method.
172 * Check that the ASL/AML-defined parameter count for this method
173 * matches the ACPI-required parameter count
175 * Some methods are allowed to have a "minimum" number of args (_SCP)
176 * because their definition in ACPI has changed over time.
178 * Note: These are BIOS errors in the declaration of the object
180 AmlParamCount
= Node
->Object
->Method
.ParamCount
;
182 if (AmlParamCount
< RequiredParamCount
)
184 ACPI_BIOS_ERROR_PREDEFINED ((AE_INFO
, Pathname
, ACPI_WARN_ALWAYS
,
185 "Insufficient arguments - "
186 "ASL declared %u, ACPI requires %u",
187 AmlParamCount
, RequiredParamCount
));
189 else if ((AmlParamCount
> RequiredParamCount
) &&
190 !(Predefined
->Info
.ArgumentList
& ARG_COUNT_IS_MINIMUM
))
192 ACPI_BIOS_ERROR_PREDEFINED ((AE_INFO
, Pathname
, ACPI_WARN_ALWAYS
,
193 "Excess arguments - "
194 "ASL declared %u, ACPI requires %u",
195 AmlParamCount
, RequiredParamCount
));
200 /*******************************************************************************
202 * FUNCTION: AcpiNsCheckArgumentCount
204 * PARAMETERS: Pathname - Full pathname to the node (for error msgs)
205 * Node - Namespace node for the method/object
206 * UserParamCount - Number of args passed in by the caller
207 * Predefined - Pointer to entry in predefined name table
211 * DESCRIPTION: Check that incoming argument count matches the declared
212 * parameter count (in the ASL/AML) for an object.
214 ******************************************************************************/
217 AcpiNsCheckArgumentCount (
219 ACPI_NAMESPACE_NODE
*Node
,
220 UINT32 UserParamCount
,
221 const ACPI_PREDEFINED_INFO
*Predefined
)
223 UINT32 AmlParamCount
;
224 UINT32 RequiredParamCount
;
230 * Not a predefined name. Check the incoming user argument count
231 * against the count that is specified in the method/object.
233 if (Node
->Type
!= ACPI_TYPE_METHOD
)
237 ACPI_INFO_PREDEFINED ((AE_INFO
, Pathname
, ACPI_WARN_ALWAYS
,
238 "%u arguments were passed to a non-method ACPI object (%s)",
239 UserParamCount
, AcpiUtGetTypeName (Node
->Type
)));
246 * This is a control method. Check the parameter count.
247 * We can only check the incoming argument count against the
248 * argument count declared for the method in the ASL/AML.
250 * Emit a message if too few or too many arguments have been passed
253 * Note: Too many arguments will not cause the method to
254 * fail. However, the method will fail if there are too few
255 * arguments and the method attempts to use one of the missing ones.
257 AmlParamCount
= Node
->Object
->Method
.ParamCount
;
259 if (UserParamCount
< AmlParamCount
)
261 ACPI_WARN_PREDEFINED ((AE_INFO
, Pathname
, ACPI_WARN_ALWAYS
,
262 "Insufficient arguments - "
263 "Caller passed %u, method requires %u",
264 UserParamCount
, AmlParamCount
));
266 else if (UserParamCount
> AmlParamCount
)
268 ACPI_INFO_PREDEFINED ((AE_INFO
, Pathname
, ACPI_WARN_ALWAYS
,
269 "Excess arguments - "
270 "Caller passed %u, method requires %u",
271 UserParamCount
, AmlParamCount
));
278 * This is a predefined name. Validate the user-supplied parameter
279 * count against the ACPI specification. We don't validate against
280 * the method itself because what is important here is that the
281 * caller is in conformance with the spec. (The arg count for the
282 * method was checked against the ACPI spec earlier.)
284 * Some methods are allowed to have a "minimum" number of args (_SCP)
285 * because their definition in ACPI has changed over time.
288 METHOD_GET_ARG_COUNT (Predefined
->Info
.ArgumentList
);
290 if (UserParamCount
< RequiredParamCount
)
292 ACPI_WARN_PREDEFINED ((AE_INFO
, Pathname
, ACPI_WARN_ALWAYS
,
293 "Insufficient arguments - "
294 "Caller passed %u, ACPI requires %u",
295 UserParamCount
, RequiredParamCount
));
297 else if ((UserParamCount
> RequiredParamCount
) &&
298 !(Predefined
->Info
.ArgumentList
& ARG_COUNT_IS_MINIMUM
))
300 ACPI_INFO_PREDEFINED ((AE_INFO
, Pathname
, ACPI_WARN_ALWAYS
,
301 "Excess arguments - "
302 "Caller passed %u, ACPI requires %u",
303 UserParamCount
, RequiredParamCount
));