MdeModulePkg/EbcDxe: add EBC Debugger
Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Pete Batard <pete@akeo.ie> Reviewed-by: Jiewen Yao <jiewen.yao@intel.com>
This commit is contained in:
Pete Batard
Jiewen Yao
659
MdeModulePkg/Universal/EbcDxe/EbcDebugger/Edb.c
Normal file
659
MdeModulePkg/Universal/EbcDxe/EbcDebugger/Edb.c
Normal file
@@ -0,0 +1,659 @@
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/*++
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Copyright (c) 2007, Intel Corporation
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All rights reserved. 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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Module Name:
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Ebc.c
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Abstract:
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--*/
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#include <Uefi.h>
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#include "Edb.h"
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EFI_DEBUGGER_PRIVATE_DATA mDebuggerPrivate = {
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EFI_DEBUGGER_SIGNATURE, // Signature
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IsaEbc, // Isa
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(EBC_DEBUGGER_MAJOR_VERSION << 16) |
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EBC_DEBUGGER_MINOR_VERSION, // EfiDebuggerRevision
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(VM_MAJOR_VERSION << 16) |
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VM_MINOR_VERSION, // EbcVmRevision
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NULL, // DebugImageInfoTableHeader
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NULL, // Vol
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NULL, // PciRootBridgeIo
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mDebuggerCommandSet, // DebuggerCommandSet
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{0}, // DebuggerSymbolContext
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0, // DebuggerBreakpointCount
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{{0}}, // DebuggerBreakpointContext
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0, // CallStackEntryCount
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{{0}}, // CallStackEntry
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0, // TraceEntryCount
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{{0}}, // TraceEntry
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{0}, // StepContext
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{0}, // GoTilContext
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0, // InstructionScope
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EFI_DEBUG_DEFAULT_INSTRUCTION_NUMBER, // InstructionNumber
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EFI_DEBUG_FLAG_EBC_BOE | EFI_DEBUG_FLAG_EBC_BOT, // FeatureFlags
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0, // StatusFlags
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FALSE, // EnablePageBreak
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NULL // BreakEvent
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};
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CHAR16 *mExceptionStr[] = {
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L"EXCEPT_EBC_UNDEFINED",
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L"EXCEPT_EBC_DIVIDE_ERROR",
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L"EXCEPT_EBC_DEBUG",
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L"EXCEPT_EBC_BREAKPOINT",
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L"EXCEPT_EBC_OVERFLOW",
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L"EXCEPT_EBC_INVALID_OPCODE",
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L"EXCEPT_EBC_STACK_FAULT",
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L"EXCEPT_EBC_ALIGNMENT_CHECK",
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L"EXCEPT_EBC_INSTRUCTION_ENCODING",
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L"EXCEPT_EBC_BAD_BREAK",
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L"EXCEPT_EBC_SINGLE_STEP",
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};
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VOID
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EdbClearAllBreakpoint (
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IN EFI_DEBUGGER_PRIVATE_DATA *DebuggerPrivate,
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IN BOOLEAN NeedRemove
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)
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/*++
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Routine Description:
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Clear all the breakpoint
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Arguments:
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DebuggerPrivate - EBC Debugger private data structure
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NeedRemove - Whether need to remove all the breakpoint
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Returns:
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None
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--*/
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{
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UINTN Index;
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//
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// Patch all the breakpoint
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//
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for (Index = 0; (Index < DebuggerPrivate->DebuggerBreakpointCount) && (Index < EFI_DEBUGGER_BREAKPOINT_MAX); Index++) {
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if (DebuggerPrivate->DebuggerBreakpointContext[Index].State) {
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CopyMem (
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(VOID *)(UINTN)DebuggerPrivate->DebuggerBreakpointContext[Index].BreakpointAddress,
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&DebuggerPrivate->DebuggerBreakpointContext[Index].OldInstruction,
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sizeof(UINT16)
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);
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}
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}
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//
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// Zero Breakpoint context, if need to remove all breakpoint
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//
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if (NeedRemove) {
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DebuggerPrivate->DebuggerBreakpointCount = 0;
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ZeroMem (DebuggerPrivate->DebuggerBreakpointContext, sizeof(DebuggerPrivate->DebuggerBreakpointContext));
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}
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//
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// Done
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//
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return ;
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}
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VOID
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EdbSetAllBreakpoint (
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IN EFI_DEBUGGER_PRIVATE_DATA *DebuggerPrivate
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)
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/*++
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Routine Description:
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Set all the breakpoint
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Arguments:
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DebuggerPrivate - EBC Debugger private data structure
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Returns:
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None
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--*/
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{
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UINTN Index;
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UINT16 Data16;
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//
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// Set all the breakpoint (BREAK(3) : 0x0300)
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//
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Data16 = 0x0300;
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for (Index = 0; (Index < DebuggerPrivate->DebuggerBreakpointCount) && (Index < EFI_DEBUGGER_BREAKPOINT_MAX); Index++) {
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if (DebuggerPrivate->DebuggerBreakpointContext[Index].State) {
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CopyMem (
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(VOID *)(UINTN)DebuggerPrivate->DebuggerBreakpointContext[Index].BreakpointAddress,
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&Data16,
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sizeof(UINT16)
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);
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}
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}
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//
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// Check if current break is caused by breakpoint set.
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// If so, we need to patch memory back to let user see the real memory.
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//
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if (DebuggerPrivate->DebuggerBreakpointContext[EFI_DEBUGGER_BREAKPOINT_MAX].BreakpointAddress != 0) {
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CopyMem (
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(VOID *)(UINTN)DebuggerPrivate->DebuggerBreakpointContext[EFI_DEBUGGER_BREAKPOINT_MAX].BreakpointAddress,
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&DebuggerPrivate->DebuggerBreakpointContext[EFI_DEBUGGER_BREAKPOINT_MAX].OldInstruction,
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sizeof(UINT16)
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);
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DebuggerPrivate->StatusFlags &= ~EFI_DEBUG_FLAG_EBC_B_BP;
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}
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//
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// Done
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//
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return ;
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}
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VOID
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EdbCheckBreakpoint (
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IN EFI_DEBUGGER_PRIVATE_DATA *DebuggerPrivate,
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IN EFI_SYSTEM_CONTEXT SystemContext
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)
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/*++
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Routine Description:
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Check all the breakpoint, if match, then set status flag, and record current breakpoint.
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Then clear all breakpoint to let user see a clean memory
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Arguments:
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DebuggerPrivate - EBC Debugger private data structure
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SystemContext - EBC system context.
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Returns:
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None
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--*/
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{
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UINT64 Address;
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UINTN Index;
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UINT16 OldInstruction;
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BOOLEAN IsHitBreakpoint;
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//
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// Roll back IP for breakpoint instruction (BREAK(3) : 0x0300)
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//
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Address = SystemContext.SystemContextEbc->Ip - sizeof(UINT16);
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//
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// Check if the breakpoint is hit
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//
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IsHitBreakpoint = FALSE;
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for (Index = 0; (Index < DebuggerPrivate->DebuggerBreakpointCount) && (Index < EFI_DEBUGGER_BREAKPOINT_MAX); Index++) {
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if ((DebuggerPrivate->DebuggerBreakpointContext[Index].BreakpointAddress == Address) &&
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(DebuggerPrivate->DebuggerBreakpointContext[Index].State)) {
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OldInstruction = (UINT16)DebuggerPrivate->DebuggerBreakpointContext[Index].OldInstruction;
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IsHitBreakpoint = TRUE;
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break;
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}
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}
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if (IsHitBreakpoint) {
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//
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// If hit, record current breakpoint
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//
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DebuggerPrivate->DebuggerBreakpointContext[EFI_DEBUGGER_BREAKPOINT_MAX] = DebuggerPrivate->DebuggerBreakpointContext[Index];
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DebuggerPrivate->DebuggerBreakpointContext[EFI_DEBUGGER_BREAKPOINT_MAX].State = TRUE;
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//
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// Update: IP and Instruction (NOTE: Since we not allow set breakpoint to BREAK 3, this update is safe)
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//
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SystemContext.SystemContextEbc->Ip = Address;
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//
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// Set Flags
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//
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DebuggerPrivate->StatusFlags |= EFI_DEBUG_FLAG_EBC_BP;
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} else {
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//
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// If not hit, check whether current IP is in breakpoint list,
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// because STEP will be triggered before execute the instruction.
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// We should not patch it in de-init.
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//
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Address = SystemContext.SystemContextEbc->Ip;
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//
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// Check if the breakpoint is hit
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//
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IsHitBreakpoint = FALSE;
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for (Index = 0; (Index < DebuggerPrivate->DebuggerBreakpointCount) && (Index < EFI_DEBUGGER_BREAKPOINT_MAX); Index++) {
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if ((DebuggerPrivate->DebuggerBreakpointContext[Index].BreakpointAddress == Address) &&
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(DebuggerPrivate->DebuggerBreakpointContext[Index].State)) {
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OldInstruction = (UINT16)DebuggerPrivate->DebuggerBreakpointContext[Index].OldInstruction;
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IsHitBreakpoint = TRUE;
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break;
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}
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}
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if (IsHitBreakpoint) {
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//
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// If hit, record current breakpoint
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//
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DebuggerPrivate->DebuggerBreakpointContext[EFI_DEBUGGER_BREAKPOINT_MAX] = DebuggerPrivate->DebuggerBreakpointContext[Index];
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DebuggerPrivate->DebuggerBreakpointContext[EFI_DEBUGGER_BREAKPOINT_MAX].State = TRUE;
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//
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// Do not set Breakpoint flag. We record the address here just let it not patch breakpoint address when de-init.
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//
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} else {
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//
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// Zero current breakpoint
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//
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ZeroMem (
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&DebuggerPrivate->DebuggerBreakpointContext[EFI_DEBUGGER_BREAKPOINT_MAX],
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sizeof(DebuggerPrivate->DebuggerBreakpointContext[EFI_DEBUGGER_BREAKPOINT_MAX])
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);
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}
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}
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//
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// Done
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//
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return ;
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}
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VOID
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EdbClearSymbol (
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IN EFI_DEBUGGER_PRIVATE_DATA *DebuggerPrivate
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)
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/*++
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Routine Description:
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clear all the symbol
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Arguments:
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DebuggerPrivate - EBC Debugger private data structure
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Returns:
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None
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--*/
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{
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EFI_DEBUGGER_SYMBOL_CONTEXT *DebuggerSymbolContext;
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EFI_DEBUGGER_SYMBOL_OBJECT *Object;
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UINTN ObjectIndex;
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UINTN Index;
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//
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// Go throuth each object
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//
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DebuggerSymbolContext = &DebuggerPrivate->DebuggerSymbolContext;
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for (ObjectIndex = 0; ObjectIndex < DebuggerSymbolContext->ObjectCount; ObjectIndex++) {
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Object = &DebuggerSymbolContext->Object[ObjectIndex];
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//
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// Go throuth each entry
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//
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for (Index = 0; Index < Object->EntryCount; Index++) {
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ZeroMem (&Object->Entry[Index], sizeof(Object->Entry[Index]));
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}
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ZeroMem (Object->Name, sizeof(Object->Name));
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Object->EntryCount = 0;
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Object->BaseAddress = 0;
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Object->StartEntrypointRVA = 0;
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Object->MainEntrypointRVA = 0;
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//
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// Free source buffer
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//
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for (Index = 0; Object->SourceBuffer[Index] != NULL; Index++) {
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gBS->FreePool (Object->SourceBuffer[Index]);
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Object->SourceBuffer[Index] = NULL;
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}
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}
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DebuggerSymbolContext->ObjectCount = 0;
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return ;
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}
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EFI_STATUS
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InitDebuggerPrivateData (
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IN EFI_DEBUGGER_PRIVATE_DATA *DebuggerPrivate,
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IN EFI_EXCEPTION_TYPE ExceptionType,
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IN EFI_SYSTEM_CONTEXT SystemContext,
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IN BOOLEAN Initialized
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)
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/*++
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Routine Description:
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Initialize Debugger private data structure
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Arguments:
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DebuggerPrivate - EBC Debugger private data structure
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InterruptType - Interrupt type.
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SystemContext - EBC system context.
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Initialized - Whether the DebuggerPrivate data is initialized.
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Returns:
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None
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--*/
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{
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//
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// clear STEP flag in any condition.
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//
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if (SystemContext.SystemContextEbc->Flags & VMFLAGS_STEP) {
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SystemContext.SystemContextEbc->Flags &= ~VMFLAGS_STEP;
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}
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if (!Initialized) {
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//
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// Initialize everything
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//
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DebuggerPrivate->InstructionNumber = EFI_DEBUG_DEFAULT_INSTRUCTION_NUMBER;
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DebuggerPrivate->DebuggerBreakpointCount = 0;
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ZeroMem (DebuggerPrivate->DebuggerBreakpointContext, sizeof(DebuggerPrivate->DebuggerBreakpointContext));
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// DebuggerPrivate->StatusFlags = 0;
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DebuggerPrivate->DebuggerSymbolContext.DisplaySymbol = TRUE;
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DebuggerPrivate->DebuggerSymbolContext.DisplayCodeOnly = FALSE;
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DebuggerPrivate->DebuggerSymbolContext.ObjectCount = 0;
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} else {
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//
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// Already initialized, just check Breakpoint here.
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//
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if (ExceptionType == EXCEPT_EBC_BREAKPOINT) {
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EdbCheckBreakpoint (DebuggerPrivate, SystemContext);
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}
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//
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// Clear all breakpoint
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//
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EdbClearAllBreakpoint (DebuggerPrivate, FALSE);
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}
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//
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// Set Scope to currentl IP. (Note: Check Breakpoint may change Ip)
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//
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DebuggerPrivate->InstructionScope = SystemContext.SystemContextEbc->Ip;
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//
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// Done
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//
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return EFI_SUCCESS;
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}
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EFI_STATUS
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DeinitDebuggerPrivateData (
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IN EFI_DEBUGGER_PRIVATE_DATA *DebuggerPrivate,
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IN EFI_EXCEPTION_TYPE ExceptionType,
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IN EFI_SYSTEM_CONTEXT SystemContext,
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IN BOOLEAN Initialized
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)
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/*++
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Routine Description:
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De-initialize Debugger private data structure
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Arguments:
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DebuggerPrivate - EBC Debugger private data structure
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InterruptType - Interrupt type.
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SystemContext - EBC system context.
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Initialized - Whether the DebuggerPrivate data is initialized.
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Returns:
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None
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--*/
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{
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if (!Initialized) {
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//
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// If it does not want initialized state, de-init everything
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//
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DebuggerPrivate->FeatureFlags = EFI_DEBUG_FLAG_EBC_BOE | EFI_DEBUG_FLAG_EBC_BOT;
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DebuggerPrivate->CallStackEntryCount = 0;
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DebuggerPrivate->TraceEntryCount = 0;
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ZeroMem (DebuggerPrivate->CallStackEntry, sizeof(DebuggerPrivate->CallStackEntry));
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ZeroMem (DebuggerPrivate->TraceEntry, sizeof(DebuggerPrivate->TraceEntry));
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//
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// Clear all breakpoint
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//
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EdbClearAllBreakpoint (DebuggerPrivate, TRUE);
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//
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// Clear symbol
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//
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EdbClearSymbol (DebuggerPrivate);
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} else {
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//
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// If it wants to keep initialized state, just set breakpoint.
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//
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EdbSetAllBreakpoint (DebuggerPrivate);
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}
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//
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// Clear Step context
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//
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ZeroMem (&mDebuggerPrivate.StepContext, sizeof(mDebuggerPrivate.StepContext));
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DebuggerPrivate->StatusFlags = 0;
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|
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//
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// Done
|
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//
|
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return EFI_SUCCESS;
|
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}
|
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|
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VOID
|
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PrintExceptionReason (
|
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IN EFI_DEBUGGER_PRIVATE_DATA *DebuggerPrivate,
|
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IN EFI_EXCEPTION_TYPE ExceptionType,
|
||||
IN EFI_SYSTEM_CONTEXT SystemContext,
|
||||
IN BOOLEAN Initialized
|
||||
)
|
||||
/*++
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Routine Description:
|
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Print the reason of current break to EbcDebugger.
|
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Arguments:
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DebuggerPrivate - EBC Debugger private data structure
|
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InterruptType - Interrupt type.
|
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SystemContext - EBC system context.
|
||||
Initialized - Whether the DebuggerPrivate data is initialized.
|
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|
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Returns:
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None
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|
||||
--*/
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{
|
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//
|
||||
// Print break status
|
||||
//
|
||||
if ((DebuggerPrivate->StatusFlags & EFI_DEBUG_FLAG_EBC_GT) == EFI_DEBUG_FLAG_EBC_GT) {
|
||||
EDBPrint (L"Break on GoTil\n");
|
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} else if ((DebuggerPrivate->StatusFlags & EFI_DEBUG_FLAG_EBC_BOC) == EFI_DEBUG_FLAG_EBC_BOC) {
|
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EDBPrint (L"Break on CALL\n");
|
||||
} else if ((DebuggerPrivate->StatusFlags & EFI_DEBUG_FLAG_EBC_BOCX) == EFI_DEBUG_FLAG_EBC_BOCX) {
|
||||
EDBPrint (L"Break on CALLEX\n");
|
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} else if ((DebuggerPrivate->StatusFlags & EFI_DEBUG_FLAG_EBC_BOR) == EFI_DEBUG_FLAG_EBC_BOR) {
|
||||
EDBPrint (L"Break on RET\n");
|
||||
} else if ((DebuggerPrivate->StatusFlags & EFI_DEBUG_FLAG_EBC_BOE) == EFI_DEBUG_FLAG_EBC_BOE) {
|
||||
EDBPrint (L"Break on Entrypoint\n");
|
||||
} else if ((DebuggerPrivate->StatusFlags & EFI_DEBUG_FLAG_EBC_BOT) == EFI_DEBUG_FLAG_EBC_BOT) {
|
||||
EDBPrint (L"Break on Thunk\n");
|
||||
} else if ((DebuggerPrivate->StatusFlags & EFI_DEBUG_FLAG_EBC_STEPOVER) == EFI_DEBUG_FLAG_EBC_STEPOVER) {
|
||||
EDBPrint (L"Break on StepOver\n");
|
||||
} else if ((DebuggerPrivate->StatusFlags & EFI_DEBUG_FLAG_EBC_STEPOUT) == EFI_DEBUG_FLAG_EBC_STEPOUT) {
|
||||
EDBPrint (L"Break on StepOut\n");
|
||||
} else if ((DebuggerPrivate->StatusFlags & EFI_DEBUG_FLAG_EBC_BP) == EFI_DEBUG_FLAG_EBC_BP) {
|
||||
EDBPrint (L"Break on Breakpoint\n");
|
||||
} else if ((DebuggerPrivate->StatusFlags & EFI_DEBUG_FLAG_EBC_BOK) == EFI_DEBUG_FLAG_EBC_BOK) {
|
||||
EDBPrint (L"Break on Key\n");
|
||||
} else {
|
||||
EDBPrint (L"Exception Type - %x", (UINTN)ExceptionType);
|
||||
if ((ExceptionType >= EXCEPT_EBC_UNDEFINED) && (ExceptionType <= EXCEPT_EBC_STEP)) {
|
||||
EDBPrint (L" (%s)\n", mExceptionStr[ExceptionType]);
|
||||
} else {
|
||||
EDBPrint (L"\n");
|
||||
}
|
||||
}
|
||||
|
||||
return ;
|
||||
}
|
||||
|
||||
VOID
|
||||
EFIAPI
|
||||
EdbExceptionHandler (
|
||||
IN EFI_EXCEPTION_TYPE ExceptionType,
|
||||
IN OUT EFI_SYSTEM_CONTEXT SystemContext
|
||||
)
|
||||
/*++
|
||||
|
||||
Routine Description:
|
||||
|
||||
The default Exception Callback for the VM interpreter.
|
||||
In this function, we report status code, and print debug information
|
||||
about EBC_CONTEXT, then dead loop.
|
||||
|
||||
Arguments:
|
||||
|
||||
InterruptType - Interrupt type.
|
||||
SystemContext - EBC system context.
|
||||
|
||||
Returns:
|
||||
|
||||
None
|
||||
|
||||
--*/
|
||||
{
|
||||
CHAR16 InputBuffer[EFI_DEBUG_INPUS_BUFFER_SIZE];
|
||||
CHAR16 *CommandArg;
|
||||
EFI_DEBUGGER_COMMAND DebuggerCommand;
|
||||
EFI_DEBUG_STATUS DebugStatus;
|
||||
STATIC BOOLEAN mInitialized = FALSE;
|
||||
|
||||
DEBUG ((DEBUG_ERROR, "Hello EBC Debugger!\n"));
|
||||
|
||||
if (!mInitialized) {
|
||||
//
|
||||
// Print version
|
||||
//
|
||||
EDBPrint (
|
||||
L"EBC Interpreter Version - %d.%d\n",
|
||||
(UINTN)VM_MAJOR_VERSION,
|
||||
(UINTN)VM_MINOR_VERSION
|
||||
);
|
||||
EDBPrint (
|
||||
L"EBC Debugger Version - %d.%d\n",
|
||||
(UINTN)EBC_DEBUGGER_MAJOR_VERSION,
|
||||
(UINTN)EBC_DEBUGGER_MINOR_VERSION
|
||||
);
|
||||
}
|
||||
//
|
||||
// Init Private Data
|
||||
//
|
||||
InitDebuggerPrivateData (&mDebuggerPrivate, ExceptionType, SystemContext, mInitialized);
|
||||
|
||||
//
|
||||
// EDBPrint basic info
|
||||
//
|
||||
PrintExceptionReason (&mDebuggerPrivate, ExceptionType, SystemContext, mInitialized);
|
||||
|
||||
EdbShowDisasm (&mDebuggerPrivate, SystemContext);
|
||||
// EFI_BREAKPOINT ();
|
||||
|
||||
if (!mInitialized) {
|
||||
//
|
||||
// Interactive with user
|
||||
//
|
||||
EDBPrint (L"\nPlease enter command now, \'h\' for help.\n");
|
||||
EDBPrint (L"(Using <Command> -b <...> to enable page break.)\n");
|
||||
}
|
||||
mInitialized = TRUE;
|
||||
|
||||
//
|
||||
// Dispatch each command
|
||||
//
|
||||
while (TRUE) {
|
||||
//
|
||||
// Get user input
|
||||
//
|
||||
Input (L"\n\r" EFI_DEBUG_PROMPT_STRING, InputBuffer, EFI_DEBUG_INPUS_BUFFER_SIZE);
|
||||
EDBPrint (L"\n");
|
||||
|
||||
//
|
||||
// Get command
|
||||
//
|
||||
DebuggerCommand = MatchDebuggerCommand (InputBuffer, &CommandArg);
|
||||
if (DebuggerCommand == NULL) {
|
||||
EDBPrint (L"ERROR: Command not found!\n");
|
||||
continue;
|
||||
}
|
||||
|
||||
//
|
||||
// Check PageBreak;
|
||||
//
|
||||
if (CommandArg != NULL) {
|
||||
if (StriCmp (CommandArg, L"-b") == 0) {
|
||||
CommandArg = StrGetNextTokenLine (L" ");
|
||||
mDebuggerPrivate.EnablePageBreak = TRUE;
|
||||
}
|
||||
}
|
||||
|
||||
//
|
||||
// Dispatch command
|
||||
//
|
||||
DebugStatus = DebuggerCommand (CommandArg, &mDebuggerPrivate, ExceptionType, SystemContext);
|
||||
mDebuggerPrivate.EnablePageBreak = FALSE;
|
||||
|
||||
//
|
||||
// Check command return status
|
||||
//
|
||||
if (DebugStatus == EFI_DEBUG_RETURN) {
|
||||
mInitialized = FALSE;
|
||||
break;
|
||||
} else if (DebugStatus == EFI_DEBUG_BREAK) {
|
||||
break;
|
||||
} else if (DebugStatus == EFI_DEBUG_CONTINUE) {
|
||||
continue;
|
||||
} else {
|
||||
ASSERT (FALSE);
|
||||
}
|
||||
}
|
||||
|
||||
//
|
||||
// Deinit Private Data
|
||||
//
|
||||
DeinitDebuggerPrivateData (&mDebuggerPrivate, ExceptionType, SystemContext, mInitialized);
|
||||
|
||||
DEBUG ((DEBUG_ERROR, "Goodbye EBC Debugger!\n"));
|
||||
|
||||
return;
|
||||
}
|
||||
Reference in New Issue
Block a user