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e8a5ac7c49
Cc: Jiewen Yao <jiewen.yao@intel.com> Cc: Pete Batard <pete@akeo.ie> Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Dandan Bi <dandan.bi@intel.com> Reviewed-by: Jiewen.yao@intel.com
163 lines
3.8 KiB
C
163 lines
3.8 KiB
C
/** @file
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Copyright (c) 2007, Intel Corporation. All rights reserved.<BR>
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This program and the accompanying materials
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are licensed and made available under the terms and conditions of the BSD License
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which accompanies this distribution. The full text of the license may be found at
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http://opensource.org/licenses/bsd-license.php
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THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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**/
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#include "Edb.h"
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/**
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Check whether current IP is EBC CALL instruction (NOTE: CALLEX is exclusive)
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@param Address - EBC IP address.
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@retval TRUE - Current IP is EBC CALL instruction
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@retval FALSE - Current IP is not EBC CALL instruction
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**/
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BOOLEAN
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IsEBCCALL (
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IN UINTN Address
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)
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{
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if (GET_OPCODE(Address) != OPCODE_CALL) {
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return FALSE;
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}
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if (GET_OPERANDS (Address) & OPERAND_M_NATIVE_CALL) {
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return FALSE;
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} else {
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return TRUE;
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}
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}
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/**
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Check whether current IP is EBC RET instruction.
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@param Address - EBC IP address.
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@retval TRUE - Current IP is EBC RET instruction
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@retval FALSE - Current IP is not EBC RET instruction
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**/
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BOOLEAN
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IsEBCRET (
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IN UINTN Address
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)
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{
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if (GET_OPCODE(Address) != OPCODE_RET) {
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return FALSE;
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}
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if (GET_OPERANDS (Address) != 0) {
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return FALSE;
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} else {
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return TRUE;
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}
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}
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/**
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DebuggerCommand - StepInto.
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@param CommandArg - The argument for this command
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@param DebuggerPrivate - EBC Debugger private data structure
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@param ExceptionType - Exception type.
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@param SystemContext - EBC system context.
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@retval EFI_DEBUG_CONTINUE - formal return value
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**/
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EFI_DEBUG_STATUS
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DebuggerStepInto (
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IN CHAR16 *CommandArg,
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IN EFI_DEBUGGER_PRIVATE_DATA *DebuggerPrivate,
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IN EFI_EXCEPTION_TYPE ExceptionType,
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IN OUT EFI_SYSTEM_CONTEXT SystemContext
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)
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{
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SystemContext.SystemContextEbc->Flags |= VMFLAGS_STEP;
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return EFI_DEBUG_BREAK;
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}
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/**
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DebuggerCommand - StepOver.
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@param CommandArg - The argument for this command
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@param DebuggerPrivate - EBC Debugger private data structure
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@param ExceptionType - Exception type.
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@param SystemContext - EBC system context.
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@retval EFI_DEBUG_CONTINUE - formal return value
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**/
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EFI_DEBUG_STATUS
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DebuggerStepOver (
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IN CHAR16 *CommandArg,
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IN EFI_DEBUGGER_PRIVATE_DATA *DebuggerPrivate,
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IN EFI_EXCEPTION_TYPE ExceptionType,
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IN OUT EFI_SYSTEM_CONTEXT SystemContext
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)
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{
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if (IsEBCCALL((UINTN)SystemContext.SystemContextEbc->Ip)) {
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//
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// Check CALL (NOTE: CALLEX is exclusive)
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//
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DebuggerPrivate->FeatureFlags |= EFI_DEBUG_FLAG_EBC_STEPOVER;
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} else {
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//
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// Other instruction including CALLEX
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//
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SystemContext.SystemContextEbc->Flags |= VMFLAGS_STEP;
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}
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return EFI_DEBUG_BREAK;
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}
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/**
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DebuggerCommand - StepOut.
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@param CommandArg - The argument for this command
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@param DebuggerPrivate - EBC Debugger private data structure
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@param ExceptionType - Exception type.
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@param SystemContext - EBC system context.
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@retval EFI_DEBUG_CONTINUE - formal return value
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**/
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EFI_DEBUG_STATUS
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DebuggerStepOut (
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IN CHAR16 *CommandArg,
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IN EFI_DEBUGGER_PRIVATE_DATA *DebuggerPrivate,
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IN EFI_EXCEPTION_TYPE ExceptionType,
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IN OUT EFI_SYSTEM_CONTEXT SystemContext
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)
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{
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if (IsEBCRET((UINTN)SystemContext.SystemContextEbc->Ip)) {
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//
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// Check RET
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//
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SystemContext.SystemContextEbc->Flags |= VMFLAGS_STEP;
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} else {
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//
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// Other instruction
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//
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DebuggerPrivate->FeatureFlags |= EFI_DEBUG_FLAG_EBC_STEPOUT;
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}
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return EFI_DEBUG_BREAK;
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}
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