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-rw-r--r--Lessons/Lesson_25/UefiLessonsPkg/PCDLesson/PCDLesson.c10
1 files changed, 7 insertions, 3 deletions
diff --git a/Lessons/Lesson_25/UefiLessonsPkg/PCDLesson/PCDLesson.c b/Lessons/Lesson_25/UefiLessonsPkg/PCDLesson/PCDLesson.c
index 904404f..a3ecfeb 100644
--- a/Lessons/Lesson_25/UefiLessonsPkg/PCDLesson/PCDLesson.c
+++ b/Lessons/Lesson_25/UefiLessonsPkg/PCDLesson/PCDLesson.c
@@ -57,9 +57,13 @@ UefiMain (
Print(L"Status=%r\n", Status);
Print(L"PcdPatchableInt32=%d\n", PatchPcdGet32(PcdPatchableInt32));
//-------
- Print(L"PcdDynamicInt32=0x%x\n", PcdGet32(PcdDynamicInt32));
- PcdSet32S(PcdDynamicInt32, 0xBEEFBEEF);
- Print(L"PcdDynamicInt32=0x%x\n", PcdGet32(PcdDynamicInt32));
+ if (PcdToken(PcdDynamicInt32)) {
+ Print(L"PcdDynamicInt32=0x%x\n", PcdGet32(PcdDynamicInt32));
+ PcdSet32S(PcdDynamicInt32, 0xBEEFBEEF);
+ Print(L"PcdDynamicInt32=0x%x\n", PcdGet32(PcdDynamicInt32));
+ } else {
+ Print(L"PcdDynamicInt32 token is unassigned\n");
+ }
Print(L"PcdDynamicExInt32=%x\n", PcdGetEx32(&gUefiLessonsPkgTokenSpaceGuid, PcdDynamicExInt32));
PcdSetEx32S(&gUefiLessonsPkgTokenSpaceGuid, PcdDynamicExInt32, 0x77777777);