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9d510e61fc
https://bugzilla.tianocore.org/show_bug.cgi?id=1373 Replace BSD 2-Clause License with BSD+Patent License. This change is based on the following emails: https://lists.01.org/pipermail/edk2-devel/2019-February/036260.html https://lists.01.org/pipermail/edk2-devel/2018-October/030385.html RFCs with detailed process for the license change: V3: https://lists.01.org/pipermail/edk2-devel/2019-March/038116.html V2: https://lists.01.org/pipermail/edk2-devel/2019-March/037669.html V1: https://lists.01.org/pipermail/edk2-devel/2019-March/037500.html Contributed-under: TianoCore Contribution Agreement 1.1 Signed-off-by: Michael D Kinney <michael.d.kinney@intel.com> Reviewed-by: Hao Wu <hao.a.wu@intel.com> Reviewed-by: Jian J Wang <jian.j.wang@intel.com>
586 lines
17 KiB
C
586 lines
17 KiB
C
/** @file
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Copyright (c) 2007 - 2016, Intel Corporation. All rights reserved.<BR>
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SPDX-License-Identifier: BSD-2-Clause-Patent
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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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{
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EFI_DEBUGGER_CONFIGURATION_VERSION,
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&mDebuggerPrivate,
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}, // DebuggerConfiguration
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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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/**
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Clear all the breakpoint.
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@param DebuggerPrivate EBC Debugger private data structure
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@param NeedRemove Whether need to remove all the breakpoint
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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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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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/**
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Set all the breakpoint.
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@param DebuggerPrivate EBC Debugger private data structure
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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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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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/**
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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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@param DebuggerPrivate EBC Debugger private data structure
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@param SystemContext EBC system context.
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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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UINT64 Address;
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UINTN Index;
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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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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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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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/**
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clear all the symbol.
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@param DebuggerPrivate EBC Debugger private data structure
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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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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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/**
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Initialize Debugger private data structure
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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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@param Initialized Whether the DebuggerPrivate data is initialized.
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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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//
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// clear STEP flag in any condition.
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//
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if (SystemContext.SystemContextEbc->Flags & ((UINT64) VMFLAGS_STEP)) {
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SystemContext.SystemContextEbc->Flags &= ~((UINT64) 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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/**
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De-initialize Debugger private data structure.
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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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@param Initialized Whether the DebuggerPrivate data is initialized.
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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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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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// Done
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//
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return EFI_SUCCESS;
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}
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/**
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Print the reason of current break to EbcDebugger.
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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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@param Initialized Whether the DebuggerPrivate data is initialized.
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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,
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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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//
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// Print break status
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//
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if ((DebuggerPrivate->StatusFlags & EFI_DEBUG_FLAG_EBC_GT) == EFI_DEBUG_FLAG_EBC_GT) {
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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");
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} else if ((DebuggerPrivate->StatusFlags & EFI_DEBUG_FLAG_EBC_BOCX) == EFI_DEBUG_FLAG_EBC_BOCX) {
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EDBPrint (L"Break on CALLEX\n");
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} else if ((DebuggerPrivate->StatusFlags & EFI_DEBUG_FLAG_EBC_BOR) == EFI_DEBUG_FLAG_EBC_BOR) {
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EDBPrint (L"Break on RET\n");
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} else if ((DebuggerPrivate->StatusFlags & EFI_DEBUG_FLAG_EBC_BOE) == EFI_DEBUG_FLAG_EBC_BOE) {
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EDBPrint (L"Break on Entrypoint\n");
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} else if ((DebuggerPrivate->StatusFlags & EFI_DEBUG_FLAG_EBC_BOT) == EFI_DEBUG_FLAG_EBC_BOT) {
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EDBPrint (L"Break on Thunk\n");
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} else if ((DebuggerPrivate->StatusFlags & EFI_DEBUG_FLAG_EBC_STEPOVER) == EFI_DEBUG_FLAG_EBC_STEPOVER) {
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EDBPrint (L"Break on StepOver\n");
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} else if ((DebuggerPrivate->StatusFlags & EFI_DEBUG_FLAG_EBC_STEPOUT) == EFI_DEBUG_FLAG_EBC_STEPOUT) {
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EDBPrint (L"Break on StepOut\n");
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} else if ((DebuggerPrivate->StatusFlags & EFI_DEBUG_FLAG_EBC_BP) == EFI_DEBUG_FLAG_EBC_BP) {
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EDBPrint (L"Break on Breakpoint\n");
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} else if ((DebuggerPrivate->StatusFlags & EFI_DEBUG_FLAG_EBC_BOK) == EFI_DEBUG_FLAG_EBC_BOK) {
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EDBPrint (L"Break on Key\n");
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} else {
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EDBPrint (L"Exception Type - %x", (UINTN)ExceptionType);
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if ((ExceptionType >= EXCEPT_EBC_UNDEFINED) && (ExceptionType <= EXCEPT_EBC_STEP)) {
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EDBPrint (L" (%s)\n", mExceptionStr[ExceptionType]);
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} else {
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EDBPrint (L"\n");
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}
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}
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return ;
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}
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/**
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The default Exception Callback for the VM interpreter.
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In this function, we report status code, and print debug information
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about EBC_CONTEXT, then dead loop.
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@param ExceptionType Exception type.
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@param SystemContext EBC system context.
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**/
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VOID
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EFIAPI
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EdbExceptionHandler (
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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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CHAR16 InputBuffer[EFI_DEBUG_INPUS_BUFFER_SIZE];
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CHAR16 *CommandArg;
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EFI_DEBUGGER_COMMAND DebuggerCommand;
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EFI_DEBUG_STATUS DebugStatus;
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STATIC BOOLEAN mInitialized;
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mInitialized = FALSE;
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DEBUG ((DEBUG_ERROR, "Hello EBC Debugger!\n"));
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if (!mInitialized) {
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//
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// Print version
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//
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EDBPrint (
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L"EBC Interpreter Version - %d.%d\n",
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(UINTN)VM_MAJOR_VERSION,
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(UINTN)VM_MINOR_VERSION
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);
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EDBPrint (
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L"EBC Debugger Version - %d.%d\n",
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(UINTN)EBC_DEBUGGER_MAJOR_VERSION,
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(UINTN)EBC_DEBUGGER_MINOR_VERSION
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);
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}
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//
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// Init Private Data
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//
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InitDebuggerPrivateData (&mDebuggerPrivate, ExceptionType, SystemContext, mInitialized);
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//
|
|
// 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;
|
|
}
|