tyler.durden
/
audk
mirror of https://github.com/acidanthera/audk.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

IntelFsp2Pkg: PeiService pointer not reset to 0 in SecMain 

REF: https://bugzilla.tianocore.org/show_bug.cgi?id=2018

Current FSP SEC_IDT_TABLE structure is not natural aligned:
  typedef struct _SEC_IDT_TABLE {
    EFI_PEI_SERVICES  *PeiService;
    UINT64            IdtTable[];
  } SEC_IDT_TABLE;
Compiler will insert DWORD padding between 2 elements and
GetPeiServicesTablePointer() in early phase then always
returns padding data from stack, which was not reset to 0
in SecMain.

Solution is to align FSP SEC_IDT_TABLE structure to UefiCpuPkg
to have UINT64 as PeiService field and reset it to 0.

Test: Verified on internal platform and booting successfully
      with FSP API mode.

Cc: Nate DeSimone <nathaniel.l.desimone@intel.com>
Cc: Star Zeng <star.zeng@intel.com>
Signed-off-by: Chasel Chiu <chasel.chiu@intel.com>
Reviewed-by: Nate DeSimone <nathaniel.l.desimone@intel.com>
Reviewed-by: Star Zeng <star.zeng@intel.com>
This commit is contained in:
Chasel Chiu 2019-07-25 22:22:29 +08:00
parent 0dd8d7d556
commit 520a1e60de
2 changed files with 9 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
IntelFsp2Pkg/FspSecCore/SecMain.c
View File

@ -114,7 +114,7 @@ SecStartup (
// | |
// | |
// |-------------------|----> TempRamBase
IdtTableInStack.PeiService = NULL;
IdtTableInStack.PeiService = 0;
AsmReadIdtr (&IdtDescriptor);
if (IdtDescriptor.Base == 0) {
ExceptionHandler = FspGetExceptionHandler(mIdtEntryTemplate);

10
IntelFsp2Pkg/FspSecCore/SecMain.h
View File

@ -1,6 +1,6 @@
/** @file
Copyright (c) 2014 - 2018, Intel Corporation. All rights reserved.<BR>
Copyright (c) 2014 - 2019, Intel Corporation. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
@ -29,7 +29,13 @@ typedef VOID (*PEI_CORE_ENTRY) ( \
);
typedef struct _SEC_IDT_TABLE {
EFI_PEI_SERVICES *PeiService;
//
// Reserved 8 bytes preceding IDT to store EFI_PEI_SERVICES**, since IDT base
// address should be 8-byte alignment.
// Note: For IA32, only the 4 bytes immediately preceding IDT is used to store
// EFI_PEI_SERVICES**
//
UINT64 PeiService;
UINT64 IdtTable[FixedPcdGet8 (PcdFspMaxInterruptSupported)];
} SEC_IDT_TABLE;