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PATCH.md

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MaciASL Patches

MaciASL can apply patches in a specific format involving regular expressions to ACPI tables. Single-line comments start with #. Patches themselves should be separated by ;. Each patch consists of the following case-insentive terms:

  • extent --- application scheme. Valid extents are into, into_all.
  • scope --- application scope (ACPI scope). Valid scopes are All, DefinitionBlock, Scope, Method, Device, Processor, ThermalZone.
  • predicate --- precondition for patch application. Valid predicates are label, name_adr, name_hid, code_regex, code_regex_not, parent_label, parent_type, parent_adr, parent_hid.
  • action --- patch action (what applied patch should do). Valid actions with arguments are insert, set_label, remove_entry, replace_content, replace_matched, replaceall_matched. Valid actions without arguments are remove_entry, remove_matched, removeall_matched, store_%8, store_%9.

Grammar definition

(into|into_all) (All|DefinitionBlock|Scope|Method|Device|Processor|ThermalZone)
[(label|name_adr|name_hid|code_regex|code_regex_not|parent_label|parent_type|parent_adr|parent_hid) <selector>...]
(insert|set_label|replace_matched|replaceall_matched|remove_matched|removeall_matched|remove_entry|replace_content|store_%8|store_%9)
begin <argument> end;

DOM patches

extent into,into_all
scope All,DefinitionBlock,Scope,Method,Device,Processor,ThermalZone
predicate label,name_adr,name_hid,parent_label,parent_type,parent_adr,parent_hid
action insert,set_label,remove_entry,replace_content

REGEX patches

extent into,into_all
predicate code_regex,code_regex_not
action remove_entry,remove_matched,removeall_matched,replace_matched,replaceall_matched,store_%8,store_%9

Examples

  1. In order to replace the content of an ACPI method use the following template:

    into method label <METHOD_NAME> parent_label <ACPI_PATH> remove_entry;

    For instance, removing the content of a _DSM method of a SAT0 ACPI device:

    into method label _DSM parent_label SAT0 remove_entry;

  2. In order to add some ACPI code to the path use the following template:

    into device label <DEVICE_NAME> insert begin <ACPI code> end;

  3. In order to rename a device via ACPI use the following template:

    into device label <OLD_NAME> set_label begin <NEW_NAME> end;
into_all all code_regex <OLD_NAME> replaceall_matched begin <NEW_NAME> end;

    For instance, renaming a SAT0 with SATA ACPI device:

    into device label SAT0 set_label begin SATA end;
into_all all code_regex SAT0 replaceall_matched begin SATA end;