EFI/acpiexec: Disable object override mechanism

This mechanism requires sscanf to be implemented for almost no
significant benefit for EFI environment, so disables it. Lv Zheng.

Signed-off-by: Lv Zheng <lv.zheng@intel.com>

source/components/utilities/utxfinit.c

@@ -126,9 +126,11 @@
         ACPI_MODULE_NAME    ("utxfinit")
 
 /* For AcpiExec only */
+#ifndef ACPI_DISABLE_OBJECT_OVERRIDE
 void
 AeDoObjectOverrides (
     void);
+#endif
 
 
 /*******************************************************************************
@@ -346,11 +348,13 @@ AcpiInitializeObjects (
 
 
 #ifdef ACPI_EXEC_APP
+#ifndef ACPI_DISABLE_OBJECT_OVERRIDE
     /*
      * This call implements the "initialization file" option for AcpiExec.
      * This is the precise point that we want to perform the overrides.
      */
     AeDoObjectOverrides ();
+#endif
 #endif
 
     /*

source/include/platform/acefi.h

@@ -301,6 +301,12 @@ UINT64 efi_call10(void *func, UINT64 arg1, UINT64 arg2, UINT64 arg3,
 #undef ACPI_USE_NATIVE_DIVIDE
 #undef ACPI_USE_SYSTEM_INTTYPES
 
+/* AcpiExec configuration */
+
+#ifdef ACPI_EXEC_APP
+#define ACPI_DISABLE_OBJECT_OVERRIDE
+#endif
+
 /*
  * Math helpers
  */

source/tools/acpiexec/aeinitfile.c

@@ -122,6 +122,8 @@
 
 /* Local prototypes */
 
+#ifndef ACPI_DISABLE_OBJECT_OVERRIDE
+
 static void
 AeDoOneOverride (
     char                    *Pathname,
@@ -304,3 +306,5 @@ AeDoOneOverride (
     AcpiOsPrintf ("New value: 0x%8.8X%8.8X\n",
         ACPI_FORMAT_UINT64 (Value));
 }
+
+#endif

source/tools/acpiexec/aemain.c

@@ -397,10 +397,12 @@ AeDoOptions (
                 return (-1);
             }
 
+#ifndef ACPI_DISABLE_OBJECT_OVERRIDE
             if (AeOpenInitializationFile (AcpiGbl_Optarg))
             {
                 return (-1);
             }
+#endif
             break;
 
         default: