sravan/system76-edk2
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

UefiCpuPkg: Simplify the implementation when separate exception stacks

Browse Source 
The API of InitializeSeparateExceptionStacks is just changed before, and
makes the struct CPU_EXCEPTION_INIT_DATA an internal definition.
Furthermore, we can even remove the struct to make core simpler.

Cc: Eric Dong <eric.dong@intel.com>
Reviewed-by: Ray Ni <ray.ni@intel.com>
Cc: Rahul Kumar <rahul1.kumar@intel.com>
Signed-off-by: Zhiguang Liu <zhiguang.liu@intel.com>
This commit is contained in:
Liu, Zhiguang
2022-08-26 15:04:47 +08:00
committed by mergify[bot]
parent d1abb876f4
commit 76cf3d35e6
8 changed files with 177 additions and 387 deletions
Download Patch File Download Diff File Expand all files Collapse all files

73
UefiCpuPkg/Library/CpuExceptionHandlerLib/CpuExceptionCommon.h
View File

@ -49,61 +49,6 @@
#define CPU_TSS_GDT_SIZE (SIZE_2KB + CPU_TSS_DESC_SIZE + CPU_TSS_SIZE)
typedef struct {
//
// The address of top of known good stack reserved for *ALL* exceptions
// listed in field StackSwitchExceptions.
//
UINTN KnownGoodStackTop;
//
// The size of known good stack for *ONE* exception only.
//
UINTN KnownGoodStackSize;
//
// Buffer of exception vector list for stack switch.
//
UINT8 *StackSwitchExceptions;
//
// Number of exception vectors in StackSwitchExceptions.
//
UINTN StackSwitchExceptionNumber;
//
// Buffer of IDT table. It must be type of IA32_IDT_GATE_DESCRIPTOR.
// Normally there's no need to change IDT table size.
//
VOID *IdtTable;
//
// Size of buffer for IdtTable.
//
UINTN IdtTableSize;
//
// Buffer of GDT table. It must be type of IA32_SEGMENT_DESCRIPTOR.
//
VOID *GdtTable;
//
// Size of buffer for GdtTable.
//
UINTN GdtTableSize;
//
// Pointer to start address of descriptor of exception task gate in the
// GDT table. It must be type of IA32_TSS_DESCRIPTOR.
//
VOID *ExceptionTssDesc;
//
// Size of buffer for ExceptionTssDesc.
//
UINTN ExceptionTssDescSize;
//
// Buffer of task-state segment for exceptions. It must be type of
// IA32_TASK_STATE_SEGMENT.
//
VOID *ExceptionTss;
//
// Size of buffer for ExceptionTss.
//
UINTN ExceptionTssSize;
} CPU_EXCEPTION_INIT_DATA;
//
// Record exception handler information
//
@ -345,18 +290,22 @@ CommonExceptionHandlerWorker (
);
/**
Setup separate stack for specific exceptions.
Setup separate stacks for certain exception handlers.
@param[in] StackSwitchData Pointer to data required for setuping up
stack switch.
@param[in] Buffer Point to buffer used to separate exception stack.
@param[in, out] BufferSize On input, it indicates the byte size of Buffer.
If the size is not enough, the return status will
be EFI_BUFFER_TOO_SMALL, and output BufferSize
will be the size it needs.
@retval EFI_SUCCESS The exceptions have been successfully
initialized with new stack.
@retval EFI_INVALID_PARAMETER StackSwitchData contains invalid content.
@retval EFI_SUCCESS The stacks are assigned successfully.
@retval EFI_BUFFER_TOO_SMALL This BufferSize is too small.
@retval EFI_UNSUPPORTED This function is not supported.
**/
EFI_STATUS
ArchSetupExceptionStack (
IN CPU_EXCEPTION_INIT_DATA *StackSwitchData
IN VOID *Buffer,
IN OUT UINTN *BufferSize
);
/**