diff options
Diffstat (limited to 'src/VBox/Devices/EFI/Firmware/MdeModulePkg/Universal/EbcDxe/EbcDebugger/EdbCmdStep.c')
-rw-r--r-- | src/VBox/Devices/EFI/Firmware/MdeModulePkg/Universal/EbcDxe/EbcDebugger/EdbCmdStep.c | 156 |
1 files changed, 156 insertions, 0 deletions
diff --git a/src/VBox/Devices/EFI/Firmware/MdeModulePkg/Universal/EbcDxe/EbcDebugger/EdbCmdStep.c b/src/VBox/Devices/EFI/Firmware/MdeModulePkg/Universal/EbcDxe/EbcDebugger/EdbCmdStep.c new file mode 100644 index 00000000..4a8800f6 --- /dev/null +++ b/src/VBox/Devices/EFI/Firmware/MdeModulePkg/Universal/EbcDxe/EbcDebugger/EdbCmdStep.c @@ -0,0 +1,156 @@ +/** @file + +Copyright (c) 2007, Intel Corporation. All rights reserved.<BR> +SPDX-License-Identifier: BSD-2-Clause-Patent + + +**/ + +#include "Edb.h" + +/** + + Check whether current IP is EBC CALL instruction (NOTE: CALLEX is exclusive) + + @param Address - EBC IP address. + + @retval TRUE - Current IP is EBC CALL instruction + @retval FALSE - Current IP is not EBC CALL instruction + +**/ +BOOLEAN +IsEBCCALL ( + IN UINTN Address + ) +{ + if (GET_OPCODE(Address) != OPCODE_CALL) { + return FALSE; + } + + if (GET_OPERANDS (Address) & OPERAND_M_NATIVE_CALL) { + return FALSE; + } else { + return TRUE; + } +} + +/** + + Check whether current IP is EBC RET instruction. + + @param Address - EBC IP address. + + @retval TRUE - Current IP is EBC RET instruction + @retval FALSE - Current IP is not EBC RET instruction + +**/ +BOOLEAN +IsEBCRET ( + IN UINTN Address + ) +{ + if (GET_OPCODE(Address) != OPCODE_RET) { + return FALSE; + } + + if (GET_OPERANDS (Address) != 0) { + return FALSE; + } else { + return TRUE; + } +} + +/** + + DebuggerCommand - StepInto. + + @param CommandArg - The argument for this command + @param DebuggerPrivate - EBC Debugger private data structure + @param ExceptionType - Exception type. + @param SystemContext - EBC system context. + + @retval EFI_DEBUG_CONTINUE - formal return value + +**/ +EFI_DEBUG_STATUS +DebuggerStepInto ( + IN CHAR16 *CommandArg, + IN EFI_DEBUGGER_PRIVATE_DATA *DebuggerPrivate, + IN EFI_EXCEPTION_TYPE ExceptionType, + IN OUT EFI_SYSTEM_CONTEXT SystemContext + ) +{ + SystemContext.SystemContextEbc->Flags |= VMFLAGS_STEP; + + return EFI_DEBUG_BREAK; +} + +/** + + DebuggerCommand - StepOver. + + @param CommandArg - The argument for this command + @param DebuggerPrivate - EBC Debugger private data structure + @param ExceptionType - Exception type. + @param SystemContext - EBC system context. + + @retval EFI_DEBUG_CONTINUE - formal return value + +**/ +EFI_DEBUG_STATUS +DebuggerStepOver ( + IN CHAR16 *CommandArg, + IN EFI_DEBUGGER_PRIVATE_DATA *DebuggerPrivate, + IN EFI_EXCEPTION_TYPE ExceptionType, + IN OUT EFI_SYSTEM_CONTEXT SystemContext + ) +{ + 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; +} + +/** + + DebuggerCommand - StepOut. + + @param CommandArg - The argument for this command + @param DebuggerPrivate - EBC Debugger private data structure + @param ExceptionType - Exception type. + @param SystemContext - EBC system context. + + @retval EFI_DEBUG_CONTINUE - formal return value + +**/ +EFI_DEBUG_STATUS +DebuggerStepOut ( + IN CHAR16 *CommandArg, + IN EFI_DEBUGGER_PRIVATE_DATA *DebuggerPrivate, + IN EFI_EXCEPTION_TYPE ExceptionType, + IN OUT EFI_SYSTEM_CONTEXT SystemContext + ) +{ + 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; +} |