ACPICA: Methods now implicitly return 0 in slack mode
Implemented an enhancement to the interpreter "slack mode". In the absence of an explicit return or an implicitly returned object from the last executed opcode, a control method will now implicitly return an integer of value 0 for Microsoft compatibility. http://www.acpica.org/bugzilla/show_bug.cgi?id=392 Signed-off-by: Lin Ming <ming.m.lin@intel.com> Signed-off-by: Bob Moore <robert.moore@intel.com> Signed-off-by: Alexey Starikovskiy <astarikovskiy@suse.de> Signed-off-by: Len Brown <len.brown@intel.com>
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@ -594,6 +594,30 @@ acpi_status acpi_ps_parse_aml(struct acpi_walk_state *walk_state)
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* The object is deleted
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* The object is deleted
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*/
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*/
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if (!previous_walk_state->return_desc) {
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if (!previous_walk_state->return_desc) {
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/*
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* In slack mode execution, if there is no return value
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* we should implicitly return zero (0) as a default value.
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*/
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if (acpi_gbl_enable_interpreter_slack &&
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!previous_walk_state->
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implicit_return_obj) {
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previous_walk_state->
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implicit_return_obj =
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acpi_ut_create_internal_object
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(ACPI_TYPE_INTEGER);
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if (!previous_walk_state->
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implicit_return_obj) {
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return_ACPI_STATUS
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(AE_NO_MEMORY);
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}
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previous_walk_state->
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implicit_return_obj->
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integer.value = 0;
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}
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/* Restart the calling control method */
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status =
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status =
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acpi_ds_restart_control_method
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acpi_ds_restart_control_method
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(walk_state,
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(walk_state,
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