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| author | Jeff Fan <jeff.fan@intel.com> | 2015-04-27 05:26:03 +0000 |
|---|---|---|
| committer | vanjeff <vanjeff@Edk2> | 2015-04-27 05:26:03 +0000 |
| commit | bbeacc5816fd474937dd35d44c91fbf24403c374 (patch) | |
| tree | b83e641211fbe2e99a236b4c75f8919923f189ce /SourceLevelDebugPkg/Library | |
| parent | 39e97c396d2f2a0b0b5ff72d0557302acc1dbe42 (diff) | |
| download | edk2-bbeacc5816fd474937dd35d44c91fbf24403c374.tar.gz edk2-bbeacc5816fd474937dd35d44c91fbf24403c374.tar.bz2 edk2-bbeacc5816fd474937dd35d44c91fbf24403c374.zip | |
SourceLevelDebugPkg/DebugAgent: Add some comments and debug message
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Jeff Fan <jeff.fan@intel.com>
Reviewed-by: Jordan Justen <jordan.l.justen@intel.com>
git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@17206 6f19259b-4bc3-4df7-8a09-765794883524
Diffstat (limited to 'SourceLevelDebugPkg/Library')
| -rw-r--r-- | SourceLevelDebugPkg/Library/DebugAgent/DebugAgentCommon/DebugAgent.c | 26 |
1 files changed, 22 insertions, 4 deletions
diff --git a/SourceLevelDebugPkg/Library/DebugAgent/DebugAgentCommon/DebugAgent.c b/SourceLevelDebugPkg/Library/DebugAgent/DebugAgentCommon/DebugAgent.c index 7f597352f1..3daa6336cb 100644 --- a/SourceLevelDebugPkg/Library/DebugAgent/DebugAgentCommon/DebugAgent.c +++ b/SourceLevelDebugPkg/Library/DebugAgent/DebugAgentCommon/DebugAgent.c @@ -1335,8 +1335,12 @@ GetBreakCause ( if ((CpuContext->Dr6 & BIT14) != 0) {
Cause = DEBUG_DATA_BREAK_CAUSE_STEPPING;
//
- // If it's single step, no need to check DR0, to ensure single step work in PeCoffExtraActionLib
- // (right after triggering a breakpoint to report image load/unload).
+ // DR6.BIT14 Indicates (when set) that the debug exception was
+ // triggered by the single step execution mode.
+ // The single-step mode is the highest priority debug exception.
+ // This is single step, no need to check DR0, to ensure single step
+ // work in PeCoffExtraActionLib (right after triggering a breakpoint
+ // to report image load/unload).
//
return Cause;
@@ -2392,9 +2396,16 @@ InterruptProcess ( // Check if this exception is issued by Debug Agent itself
// If yes, fill the debug agent exception buffer and LongJump() back to
// the saved CPU content in CommandCommunication()
+ // If exception is issued when executing Stepping, will be handled in
+ // exception handle procedure.
//
if (GetDebugFlag (DEBUG_AGENT_FLAG_AGENT_IN_PROGRESS) == 1) {
- DebugAgentMsgPrint (DEBUG_AGENT_ERROR, "Debug agent meet one Exception, ExceptionNum is %d, EIP = 0x%x.\n", Vector, (UINTN)CpuContext->Eip);
+ DebugAgentMsgPrint (
+ DEBUG_AGENT_ERROR,
+ "Debug agent meet one Exception, ExceptionNum is %d, EIP = 0x%x.\n",
+ Vector,
+ (UINTN)CpuContext->Eip
+ );
ExceptionBuffer = (DEBUG_AGENT_EXCEPTION_BUFFER *) (UINTN) GetMailboxPointer()->ExceptionBufferPointer;
ExceptionBuffer->ExceptionContent.ExceptionNum = (UINT8) Vector;
ExceptionBuffer->ExceptionContent.ExceptionData = (UINT32) CpuContext->ExceptionData;
@@ -2604,9 +2615,16 @@ InterruptProcess ( default:
if (Vector <= DEBUG_EXCEPT_SIMD) {
+ DebugAgentMsgPrint (
+ DEBUG_AGENT_ERROR,
+ "Exception happened, ExceptionNum is %d, EIP = 0x%x.\n",
+ Vector,
+ (UINTN) CpuContext->Eip
+ );
if (BreakCause == DEBUG_DATA_BREAK_CAUSE_STEPPING) {
//
- // Stepping is finished, send Ack package.
+ // If exception happened when executing Stepping, send Ack package.
+ // HOST consider Stepping command was finished.
//
if (MultiProcessorDebugSupport()) {
mDebugMpContext.BreakAtCpuIndex = ProcessorIndex;
|