diff options
| author | vanjeff <vanjeff@6f19259b-4bc3-4df7-8a09-765794883524> | 2008-12-11 08:38:20 +0000 |
|---|---|---|
| committer | vanjeff <vanjeff@6f19259b-4bc3-4df7-8a09-765794883524> | 2008-12-11 08:38:20 +0000 |
| commit | c84507ab5229c462806187b090ba6249540c9070 (patch) | |
| tree | 7667d4af2c9b069362001fefebb5750f39b0a0f0 /MdeModulePkg/Universal/DebugSupportDxe | |
| parent | 89df7f9df7551a7f32566aaf9aeaf22d0eae0864 (diff) | |
| download | edk2-c84507ab5229c462806187b090ba6249540c9070.tar.gz edk2-c84507ab5229c462806187b090ba6249540c9070.tar.bz2 edk2-c84507ab5229c462806187b090ba6249540c9070.zip | |
code scrub for DebugSpport Module.
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@6997 6f19259b-4bc3-4df7-8a09-765794883524
Diffstat (limited to 'MdeModulePkg/Universal/DebugSupportDxe')
12 files changed, 349 insertions, 436 deletions
diff --git a/MdeModulePkg/Universal/DebugSupportDxe/DebugSupport.c b/MdeModulePkg/Universal/DebugSupportDxe/DebugSupport.c index ed4d86038a..4ef12cac19 100644 --- a/MdeModulePkg/Universal/DebugSupportDxe/DebugSupport.c +++ b/MdeModulePkg/Universal/DebugSupportDxe/DebugSupport.c @@ -12,15 +12,9 @@ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. **/
-//
-// private header files
-//
#include "PlDebugSupport.h"
-//
-// This is a global that is the actual interface
-//
-EFI_DEBUG_SUPPORT_PROTOCOL gDebugSupportProtocolInterface = {
+EFI_DEBUG_SUPPORT_PROTOCOL mDebugSupportProtocolInterface = {
EFI_ISA,
GetMaximumProcessorIndex,
RegisterPeriodicCallback,
@@ -30,16 +24,16 @@ EFI_DEBUG_SUPPORT_PROTOCOL gDebugSupportProtocolInterface = { /**
- Debug Port Driver entry point.
+ Debug Support Driver entry point.
- Checks to see there's not already a DebugSupport protocol installed for
- the selected processor before installing protocol.
+ Checks to see if there's not already a Debug Support protocol installed for
+ the selected processor before installing it.
@param[in] ImageHandle The firmware allocated handle for the EFI image.
@param[in] SystemTable A pointer to the EFI System Table.
@retval EFI_SUCCESS The entry point is executed successfully.
- @retval EFI_ALREADY_STARTED DebugSupport protocol is installed already.
+ @retval EFI_ALREADY_STARTED DebugS upport protocol is installed already.
@retval other Some error occurs when executing this entry point.
**/
@@ -57,8 +51,6 @@ InitializeDebugSupportDriver ( EFI_DEBUG_SUPPORT_PROTOCOL *DebugSupportProtocolPtr;
//
- // Install Protocol Interface...
- //
// First check to see that the debug support protocol for this processor
// type is not already installed
//
@@ -81,7 +73,10 @@ InitializeDebugSupportDriver ( NULL,
EFI_OPEN_PROTOCOL_GET_PROTOCOL
);
- if (Status == EFI_SUCCESS && DebugSupportProtocolPtr->Isa == EFI_ISA) {
+ if ((Status == EFI_SUCCESS) && (DebugSupportProtocolPtr->Isa == EFI_ISA)) {
+ //
+ // a Debug Support protocol has been installed for this processor
+ //
FreePool (HandlePtr);
Status = EFI_ALREADY_STARTED;
goto ErrExit;
@@ -109,7 +104,7 @@ InitializeDebugSupportDriver ( LoadedImageProtocolPtr->Unload = PlUnloadDebugSupportDriver;
//
- // Call hook for platform specific initialization
+ // Call hook for processor specific initialization
//
Status = PlInitializeDebugSupportDriver ();
ASSERT (!EFI_ERROR (Status));
@@ -118,14 +113,14 @@ InitializeDebugSupportDriver ( }
//
- // Install DebugSupport protocol to new handle
+ // Install Debug Support protocol to new handle
//
Handle = NULL;
Status = gBS->InstallProtocolInterface (
&Handle,
&gEfiDebugSupportProtocolGuid,
EFI_NATIVE_INTERFACE,
- &gDebugSupportProtocolInterface
+ &mDebugSupportProtocolInterface
);
ASSERT (!EFI_ERROR (Status));
if (Status != EFI_SUCCESS) {
diff --git a/MdeModulePkg/Universal/DebugSupportDxe/DebugSupportDxe.inf b/MdeModulePkg/Universal/DebugSupportDxe/DebugSupportDxe.inf index d303847c75..41ed14d453 100644 --- a/MdeModulePkg/Universal/DebugSupportDxe/DebugSupportDxe.inf +++ b/MdeModulePkg/Universal/DebugSupportDxe/DebugSupportDxe.inf @@ -77,7 +77,7 @@ [Protocols]
gEfiLoadedImageProtocolGuid # PROTOCOL ALWAYS_CONSUMED
- gEfiDebugSupportProtocolGuid # PROTOCOL SOMETIMES_PRODUCED
+ gEfiDebugSupportProtocolGuid # PROTOCOL ALWAYS_PRODUCED
[FeaturePcd.IA32]
diff --git a/MdeModulePkg/Universal/DebugSupportDxe/Ia32/AsmFuncs.S b/MdeModulePkg/Universal/DebugSupportDxe/Ia32/AsmFuncs.S index 965828cf56..b6f326d805 100644 --- a/MdeModulePkg/Universal/DebugSupportDxe/Ia32/AsmFuncs.S +++ b/MdeModulePkg/Universal/DebugSupportDxe/Ia32/AsmFuncs.S @@ -37,33 +37,6 @@ ASM_PFX(FxStorSupport): pop %ebx
ret
-.globl ASM_PFX(GetIdtr)
-ASM_PFX(GetIdtr):
- push %ebp
- mov %esp,%ebp
- add $0xfffffff8,%esp
- sidtl 0xfffffffa(%ebp)
- mov 0xfffffffc(%ebp),%eax
- leave
- ret
-
-.globl ASM_PFX(WriteInterruptFlag)
-ASM_PFX(WriteInterruptFlag):
- push %ebp
- mov %esp,%ebp
- pushf
- pop %eax
- and $0x200,%eax
- shr $0x9,%eax
- mov 0x8(%ebp),%ecx
- or %cl,%cl
- jne ASM_PFX(WriteInterruptFlag+0x17)
- cli
- jmp ASM_PFX(WriteInterruptFlag+0x18)
- sti
- leave
- ret
-
.globl ASM_PFX(Vect2Desc)
ASM_PFX(Vect2Desc):
push %ebp
diff --git a/MdeModulePkg/Universal/DebugSupportDxe/Ia32/AsmFuncs.asm b/MdeModulePkg/Universal/DebugSupportDxe/Ia32/AsmFuncs.asm index cc776c867e..3cf75025ad 100644 --- a/MdeModulePkg/Universal/DebugSupportDxe/Ia32/AsmFuncs.asm +++ b/MdeModulePkg/Universal/DebugSupportDxe/Ia32/AsmFuncs.asm @@ -133,34 +133,6 @@ FxStorSupport ENDP -
-;------------------------------------------------------------------------------
-; BOOLEAN
-; WriteInterruptFlag (
-; BOOLEAN NewState
-; )
-;
-; Abstract: Programs interrupt flag to the requested state and returns previous
-; state.
-;
-WriteInterruptFlag PROC C PUBLIC State:DWORD
-
- pushfd
- pop eax
- and eax, 200h
- shr eax, 9
- mov ecx, State
- .IF cl == 0
- cli
- .ELSE
- sti
- .ENDIF
- ret
-
-WriteInterruptFlag ENDP
-
-
-
;------------------------------------------------------------------------------
; void
; Vect2Desc (
diff --git a/MdeModulePkg/Universal/DebugSupportDxe/Ia32/DebugSupport.h b/MdeModulePkg/Universal/DebugSupportDxe/Ia32/DebugSupport.h index 72765507d5..d1a126c1c2 100644 --- a/MdeModulePkg/Universal/DebugSupportDxe/Ia32/DebugSupport.h +++ b/MdeModulePkg/Universal/DebugSupportDxe/Ia32/DebugSupport.h @@ -15,7 +15,6 @@ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. #ifndef _DEBUG_SUPPORT_H_
#define _DEBUG_SUPPORT_H_
-
#include <Uefi.h>
#include <Protocol/DebugSupport.h>
@@ -31,9 +30,6 @@ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. #define NUM_IDT_ENTRIES 0x78
#define SYSTEM_TIMER_VECTOR 0x68
-#define VECTOR_ENTRY_PAGES 1
-
-#define FF_FXSR (1 << 24)
typedef
VOID
@@ -49,11 +45,10 @@ typedef struct { VOID (*RegisteredCallback) ();
} IDT_ENTRY;
-extern EFI_SYSTEM_CONTEXT SystemContext;
-extern UINT8 InterruptEntryStub[];
-extern UINT32 StubSize;
-extern VOID (*OrigVector) (VOID);
-extern IDT_ENTRY *IdtEntryTable;
+extern UINT8 InterruptEntryStub[];
+extern UINT32 StubSize;
+extern VOID (*OrigVector) (VOID);
+extern IDT_ENTRY *IdtEntryTable;
extern IA32_IDT_GATE_DESCRIPTOR NullDesc;
/**
@@ -91,21 +86,6 @@ Vect2Desc ( );
/**
- Programs interrupt flag to the requested state and returns previous
- state.
-
- @param NewState New interrupt status.
-
- @retval TRUE Old interrupt status is TRUE.
- @retval FALSE Old interrupt status is FALSE
-
-**/
-BOOLEAN
-WriteInterruptFlag (
- BOOLEAN NewState
- );
-
-/**
Initializes driver's handler registration databas.
This code executes in boot services context
@@ -139,13 +119,16 @@ PlUnloadDebugSupportDriver ( );
/**
- This is a DebugSupport protocol member function, hard
- coded to support only 1 processor for now.
-
- @param This The DebugSupport instance
- @param MaxProcessorIndex The maximuim supported processor index
+ Returns the maximum value that may be used for the ProcessorIndex parameter in
+ RegisterPeriodicCallback() and RegisterExceptionCallback().
+
+ Hard coded to support only 1 processor for now.
- @retval EFI_SUCCESS Always returned with **MaxProcessorIndex set to 0.
+ @param This A pointer to the EFI_DEBUG_SUPPORT_PROTOCOL instance.
+ @param MaxProcessorIndex Pointer to a caller-allocated UINTN in which the maximum supported
+ processor index is returned. Always 0 returned.
+
+ @retval EFI_SUCCESS Always returned with **MaxProcessorIndex set to 0.
**/
EFI_STATUS
@@ -156,15 +139,18 @@ GetMaximumProcessorIndex ( );
/**
- DebugSupport protocol member function.
-
- @param This The DebugSupport instance
- @param ProcessorIndex Which processor the callback applies to.
- @param PeriodicCallback Callback function
-
- @retval EFI_SUCCESS Indicates the callback was registered.
- @retval others Callback was not registered.
-
+ Registers a function to be called back periodically in interrupt context.
+
+ @param This A pointer to the EFI_DEBUG_SUPPORT_PROTOCOL instance.
+ @param ProcessorIndex Specifies which processor the callback function applies to.
+ @param PeriodicCallback A pointer to a function of type PERIODIC_CALLBACK that is the main
+ periodic entry point of the debug agent.
+
+ @retval EFI_SUCCESS The function completed successfully.
+ @retval EFI_ALREADY_STARTED Non-NULL PeriodicCallback parameter when a callback
+ function was previously registered.
+ @retval EFI_OUT_OF_RESOURCES System has insufficient memory resources to register new callback
+ function.
**/
EFI_STATUS
EFIAPI
@@ -175,37 +161,42 @@ RegisterPeriodicCallback ( );
/**
- DebugSupport protocol member function.
+ Registers a function to be called when a given processor exception occurs.
This code executes in boot services context.
-
- @param This The DebugSupport instance
- @param ProcessorIndex Which processor the callback applies to.
- @param NewCallback Callback function
- @param ExceptionType Which exception to hook
-
- @retval EFI_SUCCESS Indicates the callback was registered.
- @retval others Callback was not registered.
-
+
+ @param This A pointer to the EFI_DEBUG_SUPPORT_PROTOCOL instance.
+ @param ProcessorIndex Specifies which processor the callback function applies to.
+ @param ExceptionCallback A pointer to a function of type EXCEPTION_CALLBACK that is called
+ when the processor exception specified by ExceptionType occurs.
+ @param ExceptionType Specifies which processor exception to hook.
+
+ @retval EFI_SUCCESS The function completed successfully.
+ @retval EFI_ALREADY_STARTED Non-NULL PeriodicCallback parameter when a callback
+ function was previously registered.
+ @retval EFI_OUT_OF_RESOURCES System has insufficient memory resources to register new callback
+ function.
**/
EFI_STATUS
EFIAPI
RegisterExceptionCallback (
IN EFI_DEBUG_SUPPORT_PROTOCOL *This,
IN UINTN ProcessorIndex,
- IN EFI_EXCEPTION_CALLBACK NewCallback,
+ IN EFI_EXCEPTION_CALLBACK ExceptionCallback,
IN EFI_EXCEPTION_TYPE ExceptionType
);
/**
- DebugSupport protocol member function. Calls assembly routine to flush cache.
-
- @param This The DebugSupport instance
- @param ProcessorIndex Which processor the callback applies to.
- @param Start Physical base of the memory range to be invalidated
- @param Length mininum number of bytes in instruction cache to invalidate
-
- @retval EFI_SUCCESS Always returned.
+ Invalidates processor instruction cache for a memory range. Subsequent execution in this range
+ causes a fresh memory fetch to retrieve code to be executed.
+
+ @param This A pointer to the EFI_DEBUG_SUPPORT_PROTOCOL instance.
+ @param ProcessorIndex Specifies which processor's instruction cache is to be invalidated.
+ @param Start Specifies the physical base of the memory range to be invalidated.
+ @param Length Specifies the minimum number of bytes in the processor's instruction
+ cache to invalidate.
+
+ @retval EFI_SUCCESS Always returned.
**/
EFI_STATUS
@@ -227,24 +218,23 @@ InvalidateInstructionCache ( for.
@param Stub On successful exit, *Stub contains the newly allocated entry stub.
- @retval EFI_SUCCESS Always.
-
**/
-EFI_STATUS
+VOID
CreateEntryStub (
IN EFI_EXCEPTION_TYPE ExceptionType,
OUT VOID **Stub
);
/**
- Get Procedure Entry Point from IDT Gate Descriptor.
+ Get Interrupt Handle from IDT Gate Descriptor.
@param IdtGateDecriptor IDT Gate Descriptor.
- @return Procedure Entry Point located in IDT Gate Descriptor.
+ @return Interrupt Handle stored in IDT Gate Descriptor.
**/
-UINTN GetProcedureEntryPoint (
+UINTN
+GetInterruptHandleFromIdt (
IN IA32_IDT_GATE_DESCRIPTOR *IdtGateDecriptor
);
@@ -268,7 +258,7 @@ UINTN GetProcedureEntryPoint ( **/
EFI_STATUS
ManageIdtEntryTable (
- VOID (*NewCallback)(),
+ VOID (*NewCallback)(),
EFI_EXCEPTION_TYPE ExceptionType
);
@@ -283,10 +273,8 @@ ManageIdtEntryTable ( @param ExceptionType Specifies which vector to hook.
@param NewCallback A pointer to the new function to be registered.
- @retval EFI_SUCCESS Always.
-
**/
-EFI_STATUS
+VOID
HookEntry (
IN EFI_EXCEPTION_TYPE ExceptionType,
IN VOID (*NewCallback) ()
@@ -297,10 +285,8 @@ HookEntry ( @param ExceptionType Specifies which entry to unhook
- @retval EFI_SUCCESS Always.
-
**/
-EFI_STATUS
+VOID
UnhookEntry (
IN EFI_EXCEPTION_TYPE ExceptionType
);
diff --git a/MdeModulePkg/Universal/DebugSupportDxe/Ia32/PlDebugSupport.c b/MdeModulePkg/Universal/DebugSupportDxe/Ia32/PlDebugSupport.c index 932e923eaa..24e2cd0700 100644 --- a/MdeModulePkg/Universal/DebugSupportDxe/Ia32/PlDebugSupport.c +++ b/MdeModulePkg/Universal/DebugSupportDxe/Ia32/PlDebugSupport.c @@ -1,5 +1,5 @@ /** @file
- IA32 specific debug support functions
+ Generic debug support functions for IA32/x64.
Copyright (c) 2006 - 2008, Intel Corporation
All rights reserved. This program and the accompanying materials
@@ -12,27 +12,25 @@ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. **/
-//
-// private header files
-//
#include "DebugSupport.h"
//
// This the global main table to keep track of the interrupts
//
-IDT_ENTRY *IdtEntryTable = NULL;
+IDT_ENTRY *IdtEntryTable = NULL;
IA32_IDT_GATE_DESCRIPTOR NullDesc = {0};
/**
Read IDT Gate Descriptor from IDT Table.
@param Vector Specifies vector number.
- @param IdtGateDecriptor Pointer to IDT Gate Descriptor read from IDT Table.
+ @param IdtGateDescriptor Pointer to IDT Gate Descriptor read from IDT Table.
**/
-VOID ReadIdtGateDecriptor (
+VOID
+ReadIdtGateDescriptor (
IN EFI_EXCEPTION_TYPE Vector,
- OUT IA32_IDT_GATE_DESCRIPTOR *IdtGateDecriptor
+ OUT IA32_IDT_GATE_DESCRIPTOR *IdtGateDescriptor
)
{
IA32_DESCRIPTOR IdtrValue;
@@ -41,18 +39,20 @@ VOID ReadIdtGateDecriptor ( AsmReadIdtr (&IdtrValue);
IdtTable = (IA32_IDT_GATE_DESCRIPTOR *) IdtrValue.Base;
- CopyMem ((VOID *) IdtGateDecriptor, (VOID *) &(IdtTable)[Vector], sizeof (IA32_IDT_GATE_DESCRIPTOR));
+ CopyMem ((VOID *) IdtGateDescriptor, (VOID *) &(IdtTable)[Vector], sizeof (IA32_IDT_GATE_DESCRIPTOR));
}
+
/**
Write IDT Gate Descriptor into IDT Table.
@param Vector Specifies vector number.
- @param IdtGateDecriptor Pointer to IDT Gate Descriptor written into IDT Table.
+ @param IdtGateDescriptor Pointer to IDT Gate Descriptor written into IDT Table.
**/
-VOID WriteIdtGateDecriptor (
+VOID
+WriteIdtGateDescriptor (
EFI_EXCEPTION_TYPE Vector,
- IA32_IDT_GATE_DESCRIPTOR *IdtGateDecriptor
+ IA32_IDT_GATE_DESCRIPTOR *IdtGateDescriptor
)
{
IA32_DESCRIPTOR IdtrValue;
@@ -61,10 +61,9 @@ VOID WriteIdtGateDecriptor ( AsmReadIdtr (&IdtrValue);
IdtTable = (IA32_IDT_GATE_DESCRIPTOR *) IdtrValue.Base;
- CopyMem ((VOID *) &(IdtTable)[Vector], (VOID *) IdtGateDecriptor, sizeof (IA32_IDT_GATE_DESCRIPTOR));
+ CopyMem ((VOID *) &(IdtTable)[Vector], (VOID *) IdtGateDescriptor, sizeof (IA32_IDT_GATE_DESCRIPTOR));
}
-
/**
Creates a nes entry stub. Then saves the current IDT entry and replaces it
with an interrupt gate for the new entry point. The IdtEntryTable is updated
@@ -76,32 +75,35 @@ VOID WriteIdtGateDecriptor ( @param ExceptionType Specifies which vector to hook.
@param NewCallback A pointer to the new function to be registered.
- @retval EFI_SUCCESS Always.
-
**/
-EFI_STATUS
+VOID
HookEntry (
IN EFI_EXCEPTION_TYPE ExceptionType,
IN VOID (*NewCallback) ()
)
{
BOOLEAN OldIntFlagState;
- EFI_STATUS Status;
- Status = CreateEntryStub (ExceptionType, (VOID **) &IdtEntryTable[ExceptionType].StubEntry);
- if (Status == EFI_SUCCESS) {
- OldIntFlagState = WriteInterruptFlag (0);
- ReadIdtGateDecriptor (ExceptionType, &(IdtEntryTable[ExceptionType].OrigDesc));
+ CreateEntryStub (ExceptionType, (VOID **) &IdtEntryTable[ExceptionType].StubEntry);
+
+ //
+ // Disables CPU interrupts and returns the previous interrupt state
+ //
+ OldIntFlagState = SaveAndDisableInterrupts ();
- IdtEntryTable[ExceptionType].OrigVector = (DEBUG_PROC) GetProcedureEntryPoint (&(IdtEntryTable[ExceptionType].OrigDesc));
+ ReadIdtGateDescriptor (ExceptionType, &(IdtEntryTable[ExceptionType].OrigDesc));
+ IdtEntryTable[ExceptionType].OrigVector = (DEBUG_PROC) GetInterruptHandleFromIdt (&(IdtEntryTable[ExceptionType].OrigDesc));
- Vect2Desc (&IdtEntryTable[ExceptionType].NewDesc, IdtEntryTable[ExceptionType].StubEntry);
- IdtEntryTable[ExceptionType].RegisteredCallback = NewCallback;
- WriteIdtGateDecriptor (ExceptionType, &(IdtEntryTable[ExceptionType].NewDesc));
- WriteInterruptFlag (OldIntFlagState);
- }
+ Vect2Desc (&IdtEntryTable[ExceptionType].NewDesc, IdtEntryTable[ExceptionType].StubEntry);
+ IdtEntryTable[ExceptionType].RegisteredCallback = NewCallback;
+ WriteIdtGateDescriptor (ExceptionType, &(IdtEntryTable[ExceptionType].NewDesc));
+
+ //
+ // restore interrupt state
+ //
+ SetInterruptState (OldIntFlagState);
- return Status;
+ return ;
}
/**
@@ -109,31 +111,43 @@ HookEntry ( @param ExceptionType Specifies which entry to unhook
- @retval EFI_SUCCESS Always.
-
**/
-EFI_STATUS
+VOID
UnhookEntry (
IN EFI_EXCEPTION_TYPE ExceptionType
)
{
BOOLEAN OldIntFlagState;
- OldIntFlagState = WriteInterruptFlag (0);
- WriteIdtGateDecriptor (ExceptionType, &(IdtEntryTable[ExceptionType].OrigDesc));
- WriteInterruptFlag (OldIntFlagState);
+ //
+ // Disables CPU interrupts and returns the previous interrupt state
+ //
+ OldIntFlagState = SaveAndDisableInterrupts ();
- return EFI_SUCCESS;
+ //
+ // restore the default IDT Date Descriptor
+ //
+ WriteIdtGateDescriptor (ExceptionType, &(IdtEntryTable[ExceptionType].OrigDesc));
+
+ //
+ // restore interrupt state
+ //
+ SetInterruptState (OldIntFlagState);
+
+ return ;
}
/**
- This is a DebugSupport protocol member function, hard
- coded to support only 1 processor for now.
+ Returns the maximum value that may be used for the ProcessorIndex parameter in
+ RegisterPeriodicCallback() and RegisterExceptionCallback().
+
+ Hard coded to support only 1 processor for now.
- @param This The DebugSupport instance
- @param MaxProcessorIndex The maximuim supported processor index
-
- @retval EFI_SUCCESS Always returned with **MaxProcessorIndex set to 0.
+ @param This A pointer to the EFI_DEBUG_SUPPORT_PROTOCOL instance.
+ @param MaxProcessorIndex Pointer to a caller-allocated UINTN in which the maximum supported
+ processor index is returned. Always 0 returned.
+
+ @retval EFI_SUCCESS Always returned with **MaxProcessorIndex set to 0.
**/
EFI_STATUS
@@ -144,19 +158,22 @@ GetMaximumProcessorIndex ( )
{
*MaxProcessorIndex = 0;
- return (EFI_SUCCESS);
+ return EFI_SUCCESS;
}
/**
- DebugSupport protocol member function.
-
- @param This The DebugSupport instance
- @param ProcessorIndex Which processor the callback applies to.
- @param PeriodicCallback Callback function
-
- @retval EFI_SUCCESS Indicates the callback was registered.
- @retval others Callback was not registered.
-
+ Registers a function to be called back periodically in interrupt context.
+
+ @param This A pointer to the EFI_DEBUG_SUPPORT_PROTOCOL instance.
+ @param ProcessorIndex Specifies which processor the callback function applies to.
+ @param PeriodicCallback A pointer to a function of type PERIODIC_CALLBACK that is the main
+ periodic entry point of the debug agent.
+
+ @retval EFI_SUCCESS The function completed successfully.
+ @retval EFI_ALREADY_STARTED Non-NULL PeriodicCallback parameter when a callback
+ function was previously registered.
+ @retval EFI_OUT_OF_RESOURCES System has insufficient memory resources to register new callback
+ function.
**/
EFI_STATUS
EFIAPI
@@ -170,40 +187,45 @@ RegisterPeriodicCallback ( }
/**
- DebugSupport protocol member function.
+ Registers a function to be called when a given processor exception occurs.
This code executes in boot services context.
-
- @param This The DebugSupport instance
- @param ProcessorIndex Which processor the callback applies to.
- @param NewCallback Callback function
- @param ExceptionType Which exception to hook
-
- @retval EFI_SUCCESS Indicates the callback was registered.
- @retval others Callback was not registered.
-
+
+ @param This A pointer to the EFI_DEBUG_SUPPORT_PROTOCOL instance.
+ @param ProcessorIndex Specifies which processor the callback function applies to.
+ @param ExceptionCallback A pointer to a function of type EXCEPTION_CALLBACK that is called
+ when the processor exception specified by ExceptionType occurs.
+ @param ExceptionType Specifies which processor exception to hook.
+
+ @retval EFI_SUCCESS The function completed successfully.
+ @retval EFI_ALREADY_STARTED Non-NULL PeriodicCallback parameter when a callback
+ function was previously registered.
+ @retval EFI_OUT_OF_RESOURCES System has insufficient memory resources to register new callback
+ function.
**/
EFI_STATUS
EFIAPI
RegisterExceptionCallback (
IN EFI_DEBUG_SUPPORT_PROTOCOL *This,
IN UINTN ProcessorIndex,
- IN EFI_EXCEPTION_CALLBACK NewCallback,
+ IN EFI_EXCEPTION_CALLBACK ExceptionCallback,
IN EFI_EXCEPTION_TYPE ExceptionType
)
{
- return ManageIdtEntryTable (NewCallback, ExceptionType);
+ return ManageIdtEntryTable (ExceptionCallback, ExceptionType);
}
/**
- DebugSupport protocol member function. Calls assembly routine to flush cache.
-
- @param This The DebugSupport instance
- @param ProcessorIndex Which processor the callback applies to.
- @param Start Physical base of the memory range to be invalidated
- @param Length mininum number of bytes in instruction cache to invalidate
-
- @retval EFI_SUCCESS Always returned.
+ Invalidates processor instruction cache for a memory range. Subsequent execution in this range
+ causes a fresh memory fetch to retrieve code to be executed.
+
+ @param This A pointer to the EFI_DEBUG_SUPPORT_PROTOCOL instance.
+ @param ProcessorIndex Specifies which processor's instruction cache is to be invalidated.
+ @param Start Specifies the physical base of the memory range to be invalidated.
+ @param Length Specifies the minimum number of bytes in the processor's instruction
+ cache to invalidate.
+
+ @retval EFI_SUCCESS Always returned.
**/
EFI_STATUS
@@ -220,57 +242,32 @@ InvalidateInstructionCache ( }
/**
- Initializes driver's handler registration databas.
-
- This code executes in boot services context
- Must be public because it's referenced from DebugSupport.c
+ Common piece of code that invokes the registered handlers.
- @retval EFI_UNSUPPORTED If IA32 processor does not support FXSTOR/FXRSTOR instructions,
- the context save will fail, so these processor's are not supported.
- @retval EFI_OUT_OF_RESOURCES Fails to allocate memory.
- @retval EFI_SUCCESS Initializes successfully.
+ This code executes in exception context so no efi calls are allowed.
+
+ @param ExceptionType Exception type
+ @param ContextRecord System context
**/
-EFI_STATUS
-PlInitializeDebugSupportDriver (
- VOID
+VOID
+InterruptDistrubutionHub (
+ EFI_EXCEPTION_TYPE ExceptionType,
+ EFI_SYSTEM_CONTEXT_IA32 *ContextRecord
)
{
- EFI_EXCEPTION_TYPE ExceptionType;
-
- if (!FxStorSupport ()) {
- return EFI_UNSUPPORTED;
- }
-
- IdtEntryTable = AllocateZeroPool (sizeof (IDT_ENTRY) * NUM_IDT_ENTRIES);
- if (IdtEntryTable == NULL) {
- return EFI_OUT_OF_RESOURCES;
- }
-
- for (ExceptionType = 0; ExceptionType < NUM_IDT_ENTRIES; ExceptionType++) {
- IdtEntryTable[ExceptionType].StubEntry = (DEBUG_PROC) (UINTN) AllocatePool (StubSize);
- if (IdtEntryTable[ExceptionType].StubEntry == NULL) {
- goto ErrorCleanup;
- }
-
- CopyMem ((VOID *)(UINTN)IdtEntryTable[ExceptionType].StubEntry, InterruptEntryStub, StubSize);
- }
- return EFI_SUCCESS;
-
-ErrorCleanup:
-
- for (ExceptionType = 0; ExceptionType < NUM_IDT_ENTRIES; ExceptionType++) {
- if (IdtEntryTable[ExceptionType].StubEntry != NULL) {
- FreePool ((VOID *)(UINTN)IdtEntryTable[ExceptionType].StubEntry);
+ if (IdtEntryTable[ExceptionType].RegisteredCallback != NULL) {
+ if (ExceptionType != SYSTEM_TIMER_VECTOR) {
+ IdtEntryTable[ExceptionType].RegisteredCallback (ExceptionType, ContextRecord);
+ } else {
+ OrigVector = IdtEntryTable[ExceptionType].OrigVector;
+ IdtEntryTable[ExceptionType].RegisteredCallback (ContextRecord);
}
}
- FreePool (IdtEntryTable);
-
- return EFI_OUT_OF_RESOURCES;
}
/**
- This is the callback that is written to the LoadedImage protocol instance
+ This is the callback that is written to the Loaded Image protocol instance
on the image handle. It uninstalls all registered handlers and frees all entry
stub memory.
@@ -289,33 +286,71 @@ PlUnloadDebugSupportDriver ( for (ExceptionType = 0; ExceptionType < NUM_IDT_ENTRIES; ExceptionType++) {
ManageIdtEntryTable (NULL, ExceptionType);
+ //
+ // Free space for each Interrupt Stub precedure.
+ //
+ if (IdtEntryTable[ExceptionType].StubEntry != NULL) {
+ FreePool ((VOID *)(UINTN)IdtEntryTable[ExceptionType].StubEntry);
+ }
}
FreePool (IdtEntryTable);
+
return EFI_SUCCESS;
}
/**
- Common piece of code that invokes the registered handlers.
-
- This code executes in exception context so no efi calls are allowed.
+ Initializes driver's handler registration database.
+
+ This code executes in boot services context.
+ Must be public because it's referenced from DebugSupport.c
- @param ExceptionType Exception type
- @param ContextRecord System context
+ @retval EFI_UNSUPPORTED If IA32/x64 processor does not support FXSTOR/FXRSTOR instructions,
+ the context save will fail, so these processors are not supported.
+ @retval EFI_OUT_OF_RESOURCES Fails to allocate memory.
+ @retval EFI_SUCCESS Initializes successfully.
**/
-VOID
-InterruptDistrubutionHub (
- EFI_EXCEPTION_TYPE ExceptionType,
- EFI_SYSTEM_CONTEXT_IA32 *ContextRecord
+EFI_STATUS
+PlInitializeDebugSupportDriver (
+ VOID
)
{
- if (IdtEntryTable[ExceptionType].RegisteredCallback != NULL) {
- if (ExceptionType != SYSTEM_TIMER_VECTOR) {
- IdtEntryTable[ExceptionType].RegisteredCallback (ExceptionType, ContextRecord);
- } else {
- OrigVector = IdtEntryTable[ExceptionType].OrigVector;
- IdtEntryTable[ExceptionType].RegisteredCallback (ContextRecord);
+ EFI_EXCEPTION_TYPE ExceptionType;
+
+ //
+ // Check whether FxStor instructions are supported.
+ //
+ if (!FxStorSupport ()) {
+ return EFI_UNSUPPORTED;
+ }
+
+ IdtEntryTable = AllocateZeroPool (sizeof (IDT_ENTRY) * NUM_IDT_ENTRIES);
+ if (IdtEntryTable == NULL) {
+ return EFI_OUT_OF_RESOURCES;
+ }
+
+ for (ExceptionType = 0; ExceptionType < NUM_IDT_ENTRIES; ExceptionType ++) {
+ IdtEntryTable[ExceptionType].StubEntry = (DEBUG_PROC) (UINTN) AllocatePool (StubSize);
+ if (IdtEntryTable[ExceptionType].StubEntry == NULL) {
+ goto ErrorCleanup;
+ }
+
+ //
+ // Copy Interrupt stub code.
+ //
+ CopyMem ((VOID *)(UINTN)IdtEntryTable[ExceptionType].StubEntry, InterruptEntryStub, StubSize);
+ }
+ return EFI_SUCCESS;
+
+ErrorCleanup:
+
+ for (ExceptionType = 0; ExceptionType < NUM_IDT_ENTRIES; ExceptionType++) {
+ if (IdtEntryTable[ExceptionType].StubEntry != NULL) {
+ FreePool ((VOID *)(UINTN)IdtEntryTable[ExceptionType].StubEntry);
}
}
+ FreePool (IdtEntryTable);
+
+ return EFI_OUT_OF_RESOURCES;
}
diff --git a/MdeModulePkg/Universal/DebugSupportDxe/Ia32/PlDebugSupportIa32.c b/MdeModulePkg/Universal/DebugSupportDxe/Ia32/PlDebugSupportIa32.c index 47e4e0e350..ff21ed7f2a 100644 --- a/MdeModulePkg/Universal/DebugSupportDxe/Ia32/PlDebugSupportIa32.c +++ b/MdeModulePkg/Universal/DebugSupportDxe/Ia32/PlDebugSupportIa32.c @@ -15,23 +15,24 @@ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. #include "DebugSupport.h"
/**
- Get Procedure Entry Point from IDT Gate Descriptor.
+ Get Interrupt Handle from IDT Gate Descriptor.
- @param IdtGateDecriptor IDT Gate Descriptor.
+ @param IdtGateDescriptor IDT Gate Descriptor.
- @return Procedure Entry Point located in IDT Gate Descriptor.
+ @return Interrupt Handle stored in IDT Gate Descriptor.
**/
-UINTN GetProcedureEntryPoint (
- IN IA32_IDT_GATE_DESCRIPTOR *IdtGateDecriptor
+UINTN
+GetInterruptHandleFromIdt (
+ IN IA32_IDT_GATE_DESCRIPTOR *IdtGateDescriptor
)
{
- UINTN ProcedureEntryPoint;
+ UINTN InterruptHandle;
- ((UINT16 *) &ProcedureEntryPoint)[0] = (UINT16) IdtGateDecriptor->Bits.OffsetLow;
- ((UINT16 *) &ProcedureEntryPoint)[1] = (UINT16) IdtGateDecriptor->Bits.OffsetHigh;
+ ((UINT16 *) &InterruptHandle)[0] = (UINT16) IdtGateDescriptor->Bits.OffsetLow;
+ ((UINT16 *) &InterruptHandle)[1] = (UINT16) IdtGateDescriptor->Bits.OffsetHigh;
- return ProcedureEntryPoint;
+ return InterruptHandle;
}
/**
@@ -44,10 +45,8 @@ UINTN GetProcedureEntryPoint ( for.
@param Stub On successful exit, *Stub contains the newly allocated entry stub.
- @retval EFI_SUCCESS Always.
-
**/
-EFI_STATUS
+VOID
CreateEntryStub (
IN EFI_EXCEPTION_TYPE ExceptionType,
OUT VOID **Stub
@@ -80,7 +79,7 @@ CreateEntryStub ( //
*(UINT32 *) &StubCopy[0x0e] = (UINT32) CommonIdtEntry - (UINT32) &StubCopy[StubSize];
- return EFI_SUCCESS;
+ return ;
}
/**
@@ -94,16 +93,15 @@ CreateEntryStub ( be uninstalled.
@param ExceptionType Indicates which entry to manage.
- @retval EFI_SUCCESS Process is ok.
+ @retval EFI_SUCCESS Installing or Uninstalling operation is ok.
@retval EFI_INVALID_PARAMETER Requested uninstalling a handler from a vector that has
no handler registered for it
@retval EFI_ALREADY_STARTED Requested install to a vector that already has a handler registered.
- @retval others Possible return values are passed through from UnHookEntry and HookEntry.
**/
EFI_STATUS
ManageIdtEntryTable (
- VOID (*NewCallback)(),
+ VOID (*NewCallback)(),
EFI_EXCEPTION_TYPE ExceptionType
)
{
@@ -122,7 +120,7 @@ ManageIdtEntryTable ( //
Status = EFI_ALREADY_STARTED;
} else {
- Status = UnhookEntry (ExceptionType);
+ UnhookEntry (ExceptionType);
}
} else {
//
@@ -134,7 +132,7 @@ ManageIdtEntryTable ( //
Status = EFI_INVALID_PARAMETER;
} else {
- Status = HookEntry (ExceptionType, NewCallback);
+ HookEntry (ExceptionType, NewCallback);
}
}
}
diff --git a/MdeModulePkg/Universal/DebugSupportDxe/Ipf/PlDebugSupport.c b/MdeModulePkg/Universal/DebugSupportDxe/Ipf/PlDebugSupport.c index 7b91ae4b63..d358b425de 100644 --- a/MdeModulePkg/Universal/DebugSupportDxe/Ipf/PlDebugSupport.c +++ b/MdeModulePkg/Universal/DebugSupportDxe/Ipf/PlDebugSupport.c @@ -19,11 +19,6 @@ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. BOOLEAN mInHandler = FALSE;
-typedef struct {
- UINT64 low;
- UINT64 high;
-} BUNDLE;
-
//
// number of bundles to swap in ivt
//
@@ -50,88 +45,6 @@ UINT8 IpfContextBuf[sizeof (EFI_SYSTEM_CONTEXT_IPF) + 512]; UINT8 PatchSaveBuffer[0x400];
UINTN ExternalInterruptCount;
-/**
- This is the worker function that uninstalls and removes all handlers.
-
- @param ExceptionType Exception Type
- @param NewBundles New Boundles
- @param NewCallback New Callback
-
- @retval EFI_ALEADY_STARTED Ivt already hooked.
- @retval others Indicates the request was not satisfied.
- @retval EFI_SUCCESS Successfully uninstalled.
-
-**/
-EFI_STATUS
-ManageIvtEntryTable (
- IN EFI_EXCEPTION_TYPE ExceptionType,
- IN BUNDLE NewBundles[4],
- IN VOID (*NewCallback) ()
- );
-
-/**
- Saves original IVT contents and inserts a few new bundles which are fixed up
- to store the ExceptionType and then call the common handler.
-
- @param ExceptionType Exception Type
- @param NewBundles New Boundles
- @param NewCallback New Callback
-
-**/
-VOID
-HookEntry (
- IN EFI_EXCEPTION_TYPE ExceptionType,
- IN BUNDLE NewBundles[4],
- IN VOID (*NewCallback) ()
- );
-
-/**
- Restores original IVT contents when unregistering a callback function.
-
- @param ExceptionType Exception Type
-
-**/
-VOID
-UnhookEntry (
- IN EFI_EXCEPTION_TYPE ExceptionType
- );
-
-/**
- Sets up cache flush and calls assembly function to chain external interrupt.
-
- Records new callback in IvtEntryTable.
-
- @param NewCallback New Callback.
-
-**/
-VOID
-ChainExternalInterrupt (
- IN VOID (*NewCallback) ()
- );
-
-/**
- Sets up cache flush and calls assembly function to restore external interrupt.
- Removes registered callback from IvtEntryTable.
-
-**/
-VOID
-UnchainExternalInterrupt (
- VOID
- );
-
-/**
- Given an integer number, return the physical address of the entry point in the IFT.
-
- @param HandlerIndex Index of the Handler
- @param EntryPoint IFT Entrypoint
-
-**/
-VOID
-GetHandlerEntryPoint (
- UINTN HandlerIndex,
- VOID **EntryPoint
- );
-
/**
IPF specific DebugSupport driver initialization.
diff --git a/MdeModulePkg/Universal/DebugSupportDxe/Ipf/PlDebugSupport.h b/MdeModulePkg/Universal/DebugSupportDxe/Ipf/PlDebugSupport.h index f8f5532de7..e1e34a449c 100644 --- a/MdeModulePkg/Universal/DebugSupportDxe/Ipf/PlDebugSupport.h +++ b/MdeModulePkg/Universal/DebugSupportDxe/Ipf/PlDebugSupport.h @@ -15,7 +15,6 @@ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. #ifndef _PLDEBUG_SUPPORT_H_
#define _PLDEBUG_SUPPORT_H_
-
#include <Uefi.h>
#include <Protocol/DebugSupport.h>
@@ -29,11 +28,13 @@ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. #define DISABLE_INTERRUPTS 0UL
-//
-// The remaining definitions comprise the protocol members.
-//
#define EFI_ISA IsaIpf
+typedef struct {
+ UINT64 low;
+ UINT64 high;
+} BUNDLE;
+
/**
IPF specific DebugSupport driver initialization.
@@ -217,4 +218,86 @@ CommonHandler ( IN EFI_SYSTEM_CONTEXT Context
);
+/**
+ This is the worker function that uninstalls and removes all handlers.
+
+ @param ExceptionType Exception Type
+ @param NewBundles New Boundles
+ @param NewCallback New Callback
+
+ @retval EFI_ALEADY_STARTED Ivt already hooked.
+ @retval others Indicates the request was not satisfied.
+ @retval EFI_SUCCESS Successfully uninstalled.
+
+**/
+EFI_STATUS
+ManageIvtEntryTable (
+ IN EFI_EXCEPTION_TYPE ExceptionType,
+ IN BUNDLE NewBundles[4],
+ IN VOID (*NewCallback) ()
+ );
+
+/**
+ Saves original IVT contents and inserts a few new bundles which are fixed up
+ to store the ExceptionType and then call the common handler.
+
+ @param ExceptionType Exception Type
+ @param NewBundles New Boundles
+ @param NewCallback New Callback
+
+**/
+VOID
+HookEntry (
+ IN EFI_EXCEPTION_TYPE ExceptionType,
+ IN BUNDLE NewBundles[4],
+ IN VOID (*NewCallback) ()
+ );
+
+/**
+ Restores original IVT contents when unregistering a callback function.
+
+ @param ExceptionType Exception Type
+
+**/
+VOID
+UnhookEntry (
+ IN EFI_EXCEPTION_TYPE ExceptionType
+ );
+
+/**
+ Sets up cache flush and calls assembly function to chain external interrupt.
+
+ Records new callback in IvtEntryTable.
+
+ @param NewCallback New Callback.
+
+**/
+VOID
+ChainExternalInterrupt (
+ IN VOID (*NewCallback) ()
+ );
+
+/**
+ Sets up cache flush and calls assembly function to restore external interrupt.
+ Removes registered callback from IvtEntryTable.
+
+**/
+VOID
+UnchainExternalInterrupt (
+ VOID
+ );
+
+/**
+ Given an integer number, return the physical address of the entry point in the IFT.
+
+ @param HandlerIndex Index of the Handler
+ @param EntryPoint IFT Entrypoint
+
+**/
+VOID
+GetHandlerEntryPoint (
+ UINTN HandlerIndex,
+ VOID **EntryPoint
+ );
+
#endif
diff --git a/MdeModulePkg/Universal/DebugSupportDxe/X64/AsmFuncs.S b/MdeModulePkg/Universal/DebugSupportDxe/X64/AsmFuncs.S index 087e5490bb..693d26e6e4 100644 --- a/MdeModulePkg/Universal/DebugSupportDxe/X64/AsmFuncs.S +++ b/MdeModulePkg/Universal/DebugSupportDxe/X64/AsmFuncs.S @@ -30,14 +30,6 @@ _StubSize: .long _InterruptEntryStubEnd - _InterruptEntryStub _FxStorSupport:
ret
-.globl _GetIdtr
-_GetIdtr:
- ret
-
-.globl _WriteInterruptFlag
-_WriteInterruptFlag:
- ret
-
.globl _Vect2Desc
_Vect2Desc:
ret
diff --git a/MdeModulePkg/Universal/DebugSupportDxe/X64/AsmFuncs.asm b/MdeModulePkg/Universal/DebugSupportDxe/X64/AsmFuncs.asm index f486bd32b5..d9ba0be191 100644 --- a/MdeModulePkg/Universal/DebugSupportDxe/X64/AsmFuncs.asm +++ b/MdeModulePkg/Universal/DebugSupportDxe/X64/AsmFuncs.asm @@ -131,36 +131,6 @@ FxStorSupport PROC PUBLIC ret
FxStorSupport ENDP
-
-
-
-;------------------------------------------------------------------------------
-; BOOLEAN
-; WriteInterruptFlag (
-; BOOLEAN NewState // rcx
-; )
-;
-; Abstract: Programs interrupt flag to the requested state and returns previous
-; state.
-;
-WriteInterruptFlag PROC PUBLIC
-
- pushfq
- pop rax
- and rax, 200h
- shr rax, 9
- cmp rcx, 0
- jnz EnableIF
- cli
- ret
-EnableIF:
- sti
- ret
-
-WriteInterruptFlag ENDP
-
-
-
;------------------------------------------------------------------------------
; void
; Vect2Desc (
diff --git a/MdeModulePkg/Universal/DebugSupportDxe/X64/PlDebugSupportX64.c b/MdeModulePkg/Universal/DebugSupportDxe/X64/PlDebugSupportX64.c index 943d2c6911..e898d82271 100644 --- a/MdeModulePkg/Universal/DebugSupportDxe/X64/PlDebugSupportX64.c +++ b/MdeModulePkg/Universal/DebugSupportDxe/X64/PlDebugSupportX64.c @@ -12,30 +12,28 @@ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. **/
-//
-// private header files
-//
#include "DebugSupport.h"
/**
- Get Procedure Entry Point from IDT Gate Descriptor.
+ Get Interrupt Handle from IDT Gate Descriptor.
@param IdtGateDecriptor IDT Gate Descriptor.
- @return Procedure Entry Point located in IDT Gate Descriptor.
+ @return Interrupt Handle stored in IDT Gate Descriptor.
**/
-UINTN GetProcedureEntryPoint (
+UINTN
+GetInterruptHandleFromIdt (
IN IA32_IDT_GATE_DESCRIPTOR *IdtGateDecriptor
)
{
- UINTN ProcedureEntryPoint;
+ UINTN InterruptHandle;
- ((UINT16 *) &ProcedureEntryPoint)[0] = (UINT16) IdtGateDecriptor->Bits.OffsetLow;
- ((UINT16 *) &ProcedureEntryPoint)[1] = (UINT16) IdtGateDecriptor->Bits.OffsetHigh;
- ((UINT32 *) &ProcedureEntryPoint)[1] = (UINT32) IdtGateDecriptor->Bits.OffsetUpper;
+ ((UINT16 *) &InterruptHandle)[0] = (UINT16) IdtGateDecriptor->Bits.OffsetLow;
+ ((UINT16 *) &InterruptHandle)[1] = (UINT16) IdtGateDecriptor->Bits.OffsetHigh;
+ ((UINT32 *) &InterruptHandle)[1] = (UINT32) IdtGateDecriptor->Bits.OffsetUpper;
- return ProcedureEntryPoint;
+ return InterruptHandle;
}
/**
@@ -48,10 +46,8 @@ UINTN GetProcedureEntryPoint ( for.
@param Stub On successful exit, *Stub contains the newly allocated entry stub.
- @retval EFI_SUCCESS Always.
-
**/
-EFI_STATUS
+VOID
CreateEntryStub (
IN EFI_EXCEPTION_TYPE ExceptionType,
OUT VOID **Stub
@@ -82,7 +78,7 @@ CreateEntryStub ( //
*(UINT32 *) &StubCopy[0x3] = (UINT32)((UINTN) CommonIdtEntry - (UINTN) &StubCopy[StubSize]);
- return EFI_SUCCESS;
+ return;
}
/**
@@ -123,7 +119,7 @@ ManageIdtEntryTable ( //
Status = EFI_ALREADY_STARTED;
} else {
- Status = UnhookEntry (ExceptionType);
+ UnhookEntry (ExceptionType);
}
} else {
//
@@ -135,7 +131,7 @@ ManageIdtEntryTable ( //
Status = EFI_INVALID_PARAMETER;
} else {
- Status = HookEntry (ExceptionType, NewCallback);
+ HookEntry (ExceptionType, NewCallback);
}
}
|