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1. Updated S3Resume2Pei to save IA32 IDT table setup in protected mode.

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2. Updated BootScriptSaveOnS3SaveStateThunk restore IA32 IDT table before transferring to protected mode.
It could support exception handler in 32-bit Framework Boot Script code.

Signed-off-by: vanjeff
Reviewed-by: jyao1


git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@13099 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
vanjeff
2012-03-15 05:33:43 +00:00
parent 8f07f895fb
commit e47459e635
2 changed files with 60 additions and 3 deletions
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8
UefiCpuPkg/Universal/Acpi/S3Resume2Pei/S3Resume.c
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@@ -4,7 +4,7 @@
This module will excute the boot script saved during last boot and after that,
control is passed to OS waking up handler.
Copyright (c) 2006 - 2011, Intel Corporation. All rights reserved.<BR>
Copyright (c) 2006 - 2012, Intel Corporation. All rights reserved.<BR>
This program and the accompanying materials
are licensed and made available under the terms and conditions
@@ -712,6 +712,12 @@ S3ResumeExecuteBootScript (
//
IdtBuffer = AllocatePages (EFI_SIZE_TO_PAGES((IdtDescriptor->Limit + 1) + 16));
ASSERT (IdtBuffer != NULL);
//
// Additional 16 bytes allocated to save IA32 IDT descriptor and Pei Service Table Pointer
// IA32 IDT descriptor will be used to setup IA32 IDT table for 32-bit Framework Boot Script code
//
ZeroMem (IdtBuffer, 16);
AsmReadIdtr ((IA32_DESCRIPTOR *)IdtBuffer);
CopyMem ((VOID*)((UINT8*)IdtBuffer + 16),(VOID*)(IdtDescriptor->Base), (IdtDescriptor->Limit + 1));
IdtDescriptor->Base = (UINTN)((UINT8*)IdtBuffer + 16);
*(UINTN*)(IdtDescriptor->Base - sizeof(UINTN)) = (UINTN)GetPeiServicesTablePointer ();