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ACPICA: Add argument count checking to control method invocation via acpi_evaluate_object 

Error if too few arguments, warning if too many. This applies
only to external programmatic control method execution, not
method-to-method calls within the AML.

Signed-off-by: Lin Ming <ming.m.lin@intel.com>
Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
Signed-off-by: Andi Kleen <ak@linux.intel.com>
This commit is contained in:
Bob Moore 2008-06-10 12:25:42 +08:00 committed by Andi Kleen
parent c735ab7da3
commit f3454ae810
3 changed files with 40 additions and 2 deletions
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35
drivers/acpi/namespace/nseval.c
View File

@ -138,6 +138,41 @@ acpi_status acpi_ns_evaluate(struct acpi_evaluate_info * info)
return_ACPI_STATUS(AE_NULL_OBJECT);
}
/*
* Calculate the number of arguments being passed to the method
*/
info->param_count = 0;
if (info->parameters) {
while (info->parameters[info->param_count])
info->param_count++;
}
/* Error if too few arguments were passed in */
if (info->param_count < info->obj_desc->method.param_count) {
ACPI_ERROR((AE_INFO,
"Insufficient arguments - "
"method [%4.4s] needs %d, found %d",
acpi_ut_get_node_name(info->resolved_node),
info->obj_desc->method.param_count,
info->param_count));
return_ACPI_STATUS(AE_MISSING_ARGUMENTS);
}
/* Just a warning if too many arguments */
else if (info->param_count >
info->obj_desc->method.param_count) {
ACPI_WARNING((AE_INFO,
"Excess arguments - "
"method [%4.4s] needs %d, found %d",
acpi_ut_get_node_name(info->
resolved_node),
info->obj_desc->method.param_count,
info->param_count));
}
ACPI_DUMP_PATHNAME(info->resolved_node, "Execute Method:",
ACPI_LV_INFO, _COMPONENT);

6
include/acpi/acexcep.h
View File

@ -108,8 +108,9 @@
#define AE_BAD_HEX_CONSTANT (acpi_status) (0x0007 | AE_CODE_PROGRAMMER)
#define AE_BAD_OCTAL_CONSTANT (acpi_status) (0x0008 | AE_CODE_PROGRAMMER)
#define AE_BAD_DECIMAL_CONSTANT (acpi_status) (0x0009 | AE_CODE_PROGRAMMER)
#define AE_MISSING_ARGUMENTS (acpi_status) (0x000A | AE_CODE_PROGRAMMER)
#define AE_CODE_PGM_MAX 0x0009
#define AE_CODE_PGM_MAX 0x000A
/*
* Acpi table exceptions
@ -233,7 +234,8 @@ char const *acpi_gbl_exception_names_pgm[] = {
"AE_ALIGNMENT",
"AE_BAD_HEX_CONSTANT",
"AE_BAD_OCTAL_CONSTANT",
"AE_BAD_DECIMAL_CONSTANT"
"AE_BAD_DECIMAL_CONSTANT",
"AE_MISSING_ARGUMENTS"
};
char const *acpi_gbl_exception_names_tbl[] = {

1
include/acpi/acstruct.h
View File

@ -189,6 +189,7 @@ struct acpi_evaluate_info {
union acpi_operand_object **parameters;
struct acpi_namespace_node *resolved_node;
union acpi_operand_object *return_object;
u8 param_count;
u8 pass_number;
u8 parameter_type;
u8 return_object_type;