diff options
Diffstat (limited to 'MdeModulePkg/Universal/EbcDxe/EbcDebugger/EdbCmdStep.c')
| -rw-r--r-- | MdeModulePkg/Universal/EbcDxe/EbcDebugger/EdbCmdStep.c | 198 |
1 files changed, 198 insertions, 0 deletions
diff --git a/MdeModulePkg/Universal/EbcDxe/EbcDebugger/EdbCmdStep.c b/MdeModulePkg/Universal/EbcDxe/EbcDebugger/EdbCmdStep.c new file mode 100644 index 0000000000..186c88d1a4 --- /dev/null +++ b/MdeModulePkg/Universal/EbcDxe/EbcDebugger/EdbCmdStep.c @@ -0,0 +1,198 @@ +/*++
+
+Copyright (c) 2007, Intel Corporation
+All rights reserved. This program and the accompanying materials
+are licensed and made available under the terms and conditions of the BSD License
+which accompanies this distribution. The full text of the license may be found at
+http://opensource.org/licenses/bsd-license.php
+
+THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+
+Module Name:
+
+ EdbCmdStep.c
+
+Abstract:
+
+
+--*/
+
+#include "Edb.h"
+
+BOOLEAN
+IsEBCCALL (
+ IN UINTN Address
+ )
+/*++
+
+Routine Description:
+
+ Check whether current IP is EBC CALL instruction (NOTE: CALLEX is exclusive)
+
+Arguments:
+
+ Address - EBC IP address.
+
+Returns:
+
+ TRUE - Current IP is EBC CALL instruction
+ FALSE - Current IP is not EBC CALL instruction
+
+--*/
+{
+ if (GET_OPCODE(Address) != OPCODE_CALL) {
+ return FALSE;
+ }
+
+ if (GET_OPERANDS (Address) & OPERAND_M_NATIVE_CALL) {
+ return FALSE;
+ } else {
+ return TRUE;
+ }
+}
+
+BOOLEAN
+IsEBCRET (
+ IN UINTN Address
+ )
+/*++
+
+Routine Description:
+
+ Check whether current IP is EBC RET instruction
+
+Arguments:
+
+ Address - EBC IP address.
+
+Returns:
+
+ TRUE - Current IP is EBC RET instruction
+ FALSE - Current IP is not EBC RET instruction
+
+--*/
+{
+ if (GET_OPCODE(Address) != OPCODE_RET) {
+ return FALSE;
+ }
+
+ if (GET_OPERANDS (Address) != 0) {
+ return FALSE;
+ } else {
+ return TRUE;
+ }
+}
+
+EFI_DEBUG_STATUS
+DebuggerStepInto (
+ IN CHAR16 *CommandArg,
+ IN EFI_DEBUGGER_PRIVATE_DATA *DebuggerPrivate,
+ IN EFI_EXCEPTION_TYPE ExceptionType,
+ IN OUT EFI_SYSTEM_CONTEXT SystemContext
+ )
+/*++
+
+Routine Description:
+
+ DebuggerCommand - StepInto
+
+Arguments:
+
+ CommandArg - The argument for this command
+ DebuggerPrivate - EBC Debugger private data structure
+ InterruptType - Interrupt type.
+ SystemContext - EBC system context.
+
+Returns:
+
+ EFI_DEBUG_CONTINUE - formal return value
+
+--*/
+{
+ SystemContext.SystemContextEbc->Flags |= VMFLAGS_STEP;
+
+ return EFI_DEBUG_BREAK;
+}
+
+EFI_DEBUG_STATUS
+DebuggerStepOver (
+ IN CHAR16 *CommandArg,
+ IN EFI_DEBUGGER_PRIVATE_DATA *DebuggerPrivate,
+ IN EFI_EXCEPTION_TYPE ExceptionType,
+ IN OUT EFI_SYSTEM_CONTEXT SystemContext
+ )
+/*++
+
+Routine Description:
+
+ DebuggerCommand - StepOver
+
+Arguments:
+
+ CommandArg - The argument for this command
+ DebuggerPrivate - EBC Debugger private data structure
+ InterruptType - Interrupt type.
+ SystemContext - EBC system context.
+
+Returns:
+
+ EFI_DEBUG_CONTINUE - formal return value
+
+--*/
+{
+ if (IsEBCCALL((UINTN)SystemContext.SystemContextEbc->Ip)) {
+ //
+ // Check CALL (NOTE: CALLEX is exclusive)
+ //
+ DebuggerPrivate->FeatureFlags |= EFI_DEBUG_FLAG_EBC_STEPOVER;
+ } else {
+ //
+ // Other instruction including CALLEX
+ //
+ SystemContext.SystemContextEbc->Flags |= VMFLAGS_STEP;
+ }
+
+ return EFI_DEBUG_BREAK;
+}
+
+EFI_DEBUG_STATUS
+DebuggerStepOut (
+ IN CHAR16 *CommandArg,
+ IN EFI_DEBUGGER_PRIVATE_DATA *DebuggerPrivate,
+ IN EFI_EXCEPTION_TYPE ExceptionType,
+ IN OUT EFI_SYSTEM_CONTEXT SystemContext
+ )
+/*++
+
+Routine Description:
+
+ DebuggerCommand - StepOut
+
+Arguments:
+
+ CommandArg - The argument for this command
+ DebuggerPrivate - EBC Debugger private data structure
+ InterruptType - Interrupt type.
+ SystemContext - EBC system context.
+
+Returns:
+
+ EFI_DEBUG_CONTINUE - formal return value
+
+--*/
+{
+ if (IsEBCRET((UINTN)SystemContext.SystemContextEbc->Ip)) {
+ //
+ // Check RET
+ //
+ SystemContext.SystemContextEbc->Flags |= VMFLAGS_STEP;
+ } else {
+ //
+ // Other instruction
+ //
+ DebuggerPrivate->FeatureFlags |= EFI_DEBUG_FLAG_EBC_STEPOUT;
+ }
+
+ return EFI_DEBUG_BREAK;
+}
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