From: rsun3 <rsun3@6f19259b-4bc3-4df7-8a09-765794883524>
Date: Fri, 17 Dec 2010 02:38:26 +0000 (+0000)
Subject: Fix a bug that the size of a gate descriptor in the IDT is 8 bytes. The size is 8... 
X-Git-Tag: edk2-stable201903~15298
X-Git-Url: https://git.proxmox.com/?p=mirror_edk2.git;a=commitdiff_plain;h=304a39b746f947398d2b084ef8623a51f21e49d0

Fix a bug that the size of a gate descriptor in the IDT is 8 bytes. The size is 8 bytes in 32-bit mode, while it is 16 bytes in 64-bit mode. Replace the hard-coded size with a sizeof.

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@11177 6f19259b-4bc3-4df7-8a09-765794883524
---

diff --git a/UefiCpuPkg/CpuDxe/CpuDxe.c b/UefiCpuPkg/CpuDxe/CpuDxe.c
index c5f3bb76f4..6e7498344e 100644
--- a/UefiCpuPkg/CpuDxe/CpuDxe.c
+++ b/UefiCpuPkg/CpuDxe/CpuDxe.c
@@ -1082,7 +1082,7 @@ InitInterruptDescriptorTable (
 
   if ((OldIdtPtr.Base != 0) && ((OldIdtPtr.Limit & 7) == 7)) {
     OldIdt = (IA32_IDT_GATE_DESCRIPTOR*) OldIdtPtr.Base;
-    OldIdtSize = (OldIdtPtr.Limit + 1) / 8;
+    OldIdtSize = (OldIdtPtr.Limit + 1) / sizeof (IA32_IDT_GATE_DESCRIPTOR);
   } else {
     OldIdt = NULL;
     OldIdtSize = 0;