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reactos/ntoskrnl/kdbg/kdb_cli.c
Hermès Bélusca-Maïto 52192f19d6
[NTOS:KDBG] For SYSREG2: HACK emission of a 'bt' command when entering the debugger 
CORE-19807
2024-10-14 23:37:22 +02:00

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/*
* ReactOS kernel
* Copyright (C) 2005 ReactOS Team
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
/*
* PROJECT: ReactOS kernel
* FILE: ntoskrnl/kdbg/kdb_cli.c
* PURPOSE: Kernel debugger command line interface
* PROGRAMMER: Gregor Anich (blight@blight.eu.org)
* Hervé Poussineau
* UPDATE HISTORY:
* Created 16/01/2005
*/
/* INCLUDES ******************************************************************/
#include <ntoskrnl.h>
#include "kdb.h"
#include "../kd/kdterminal.h"
#define NDEBUG
#include "debug.h"
/* DEFINES *******************************************************************/
#define KDB_ENTER_CONDITION_TO_STRING(cond) \
((cond) == KdbDoNotEnter ? "never" : \
((cond) == KdbEnterAlways ? "always" : \
((cond) == KdbEnterFromKmode ? "kmode" : "umode")))
#define KDB_ACCESS_TYPE_TO_STRING(type) \
((type) == KdbAccessRead ? "read" : \
((type) == KdbAccessWrite ? "write" : \
((type) == KdbAccessReadWrite ? "rdwr" : "exec")))
#define NPX_STATE_TO_STRING(state) \
((state) == NPX_STATE_LOADED ? "Loaded" : \
((state) == NPX_STATE_NOT_LOADED ? "Not loaded" : "Unknown"))
/* PROTOTYPES ****************************************************************/
static BOOLEAN KdbpCmdEvalExpression(ULONG Argc, PCHAR Argv[]);
static BOOLEAN KdbpCmdDisassembleX(ULONG Argc, PCHAR Argv[]);
static BOOLEAN KdbpCmdRegs(ULONG Argc, PCHAR Argv[]);
static BOOLEAN KdbpCmdBackTrace(ULONG Argc, PCHAR Argv[]);
static BOOLEAN KdbpCmdContinue(ULONG Argc, PCHAR Argv[]);
static BOOLEAN KdbpCmdStep(ULONG Argc, PCHAR Argv[]);
static BOOLEAN KdbpCmdBreakPointList(ULONG Argc, PCHAR Argv[]);
static BOOLEAN KdbpCmdEnableDisableClearBreakPoint(ULONG Argc, PCHAR Argv[]);
static BOOLEAN KdbpCmdBreakPoint(ULONG Argc, PCHAR Argv[]);
static BOOLEAN KdbpCmdThread(ULONG Argc, PCHAR Argv[]);
static BOOLEAN KdbpCmdProc(ULONG Argc, PCHAR Argv[]);
static BOOLEAN KdbpCmdMod(ULONG Argc, PCHAR Argv[]);
static BOOLEAN KdbpCmdGdtLdtIdt(ULONG Argc, PCHAR Argv[]);
static BOOLEAN KdbpCmdPcr(ULONG Argc, PCHAR Argv[]);
#ifdef _M_IX86
static BOOLEAN KdbpCmdTss(ULONG Argc, PCHAR Argv[]);
#endif
static BOOLEAN KdbpCmdBugCheck(ULONG Argc, PCHAR Argv[]);
static BOOLEAN KdbpCmdReboot(ULONG Argc, PCHAR Argv[]);
static BOOLEAN KdbpCmdFilter(ULONG Argc, PCHAR Argv[]);
static BOOLEAN KdbpCmdSet(ULONG Argc, PCHAR Argv[]);
static BOOLEAN KdbpCmdHelp(ULONG Argc, PCHAR Argv[]);
static BOOLEAN KdbpCmdDmesg(ULONG Argc, PCHAR Argv[]);
BOOLEAN ExpKdbgExtPool(ULONG Argc, PCHAR Argv[]);
BOOLEAN ExpKdbgExtPoolUsed(ULONG Argc, PCHAR Argv[]);
BOOLEAN ExpKdbgExtPoolFind(ULONG Argc, PCHAR Argv[]);
BOOLEAN ExpKdbgExtFileCache(ULONG Argc, PCHAR Argv[]);
BOOLEAN ExpKdbgExtDefWrites(ULONG Argc, PCHAR Argv[]);
BOOLEAN ExpKdbgExtIrpFind(ULONG Argc, PCHAR Argv[]);
BOOLEAN ExpKdbgExtHandle(ULONG Argc, PCHAR Argv[]);
extern char __ImageBase;
#ifdef __ROS_DWARF__
static BOOLEAN KdbpCmdPrintStruct(ULONG Argc, PCHAR Argv[]);
#endif
/* Be more descriptive than intrinsics */
#ifndef Ke386GetGlobalDescriptorTable
# define Ke386GetGlobalDescriptorTable __sgdt
#endif
#ifndef Ke386GetLocalDescriptorTable
# define Ke386GetLocalDescriptorTable __sldt
#endif
/* Portability */
FORCEINLINE
ULONG_PTR
strtoulptr(const char* nptr, char** endptr, int base)
{
#ifdef _M_IX86
return strtoul(nptr, endptr, base);
#else
return strtoull(nptr, endptr, base);
#endif
}
/* GLOBALS *******************************************************************/
typedef
BOOLEAN
(NTAPI *PKDBG_CLI_ROUTINE)(
IN PCHAR Command,
IN ULONG Argc,
IN PCH Argv[]);
static PKDBG_CLI_ROUTINE KdbCliCallbacks[10];
static BOOLEAN KdbUseIntelSyntax = FALSE; /* Set to TRUE for intel syntax */
static BOOLEAN KdbBreakOnModuleLoad = FALSE; /* Set to TRUE to break into KDB when a module is loaded */
static ULONG KdbNumberOfRowsPrinted = 0;
static ULONG KdbNumberOfColsPrinted = 0;
static BOOLEAN KdbOutputAborted = FALSE;
static BOOLEAN KdbRepeatLastCommand = FALSE;
volatile PCHAR KdbInitFileBuffer = NULL; /* Buffer where KDBinit file is loaded into during initialization */
BOOLEAN KdbpBugCheckRequested = FALSE;
/* Variables for Dmesg */
static const ULONG KdpDmesgBufferSize = 128 * 1024; // 512*1024;
static PCHAR KdpDmesgBuffer = NULL;
static volatile ULONG KdpDmesgCurrentPosition = 0;
static volatile ULONG KdpDmesgFreeBytes = 0;
static volatile ULONG KdbDmesgTotalWritten = 0;
static volatile BOOLEAN KdbpIsInDmesgMode = FALSE;
static KSPIN_LOCK KdpDmesgLogSpinLock;
const CSTRING KdbPromptStr = RTL_CONSTANT_STRING("kdb:> ");
//
// Debug Filter Component Table
//
#define KD_DEBUG_PRINT_FILTER(Name) \
{ #Name, DPFLTR_##Name##_ID }
static struct
{
PCSTR Name;
ULONG Id;
}
ComponentTable[] =
{
//
// Default components
//
{ "WIN2000", MAXULONG },
KD_DEBUG_PRINT_FILTER(DEFAULT),
//
// Standard components
//
KD_DEBUG_PRINT_FILTER(SYSTEM),
KD_DEBUG_PRINT_FILTER(SMSS),
KD_DEBUG_PRINT_FILTER(SETUP),
KD_DEBUG_PRINT_FILTER(NTFS),
KD_DEBUG_PRINT_FILTER(FSTUB),
KD_DEBUG_PRINT_FILTER(CRASHDUMP),
KD_DEBUG_PRINT_FILTER(CDAUDIO),
KD_DEBUG_PRINT_FILTER(CDROM),
KD_DEBUG_PRINT_FILTER(CLASSPNP),
KD_DEBUG_PRINT_FILTER(DISK),
KD_DEBUG_PRINT_FILTER(REDBOOK),
KD_DEBUG_PRINT_FILTER(STORPROP),
KD_DEBUG_PRINT_FILTER(SCSIPORT),
KD_DEBUG_PRINT_FILTER(SCSIMINIPORT),
KD_DEBUG_PRINT_FILTER(CONFIG),
KD_DEBUG_PRINT_FILTER(I8042PRT),
KD_DEBUG_PRINT_FILTER(SERMOUSE),
KD_DEBUG_PRINT_FILTER(LSERMOUS),
KD_DEBUG_PRINT_FILTER(KBDHID),
KD_DEBUG_PRINT_FILTER(MOUHID),
KD_DEBUG_PRINT_FILTER(KBDCLASS),
KD_DEBUG_PRINT_FILTER(MOUCLASS),
KD_DEBUG_PRINT_FILTER(TWOTRACK),
KD_DEBUG_PRINT_FILTER(WMILIB),
KD_DEBUG_PRINT_FILTER(ACPI),
KD_DEBUG_PRINT_FILTER(AMLI),
KD_DEBUG_PRINT_FILTER(HALIA64),
KD_DEBUG_PRINT_FILTER(VIDEO),
KD_DEBUG_PRINT_FILTER(SVCHOST),
KD_DEBUG_PRINT_FILTER(VIDEOPRT),
KD_DEBUG_PRINT_FILTER(TCPIP),
KD_DEBUG_PRINT_FILTER(DMSYNTH),
KD_DEBUG_PRINT_FILTER(NTOSPNP),
KD_DEBUG_PRINT_FILTER(FASTFAT),
KD_DEBUG_PRINT_FILTER(SAMSS),
KD_DEBUG_PRINT_FILTER(PNPMGR),
KD_DEBUG_PRINT_FILTER(NETAPI),
KD_DEBUG_PRINT_FILTER(SCSERVER),
KD_DEBUG_PRINT_FILTER(SCCLIENT),
KD_DEBUG_PRINT_FILTER(SERIAL),
KD_DEBUG_PRINT_FILTER(SERENUM),
KD_DEBUG_PRINT_FILTER(UHCD),
KD_DEBUG_PRINT_FILTER(RPCPROXY),
KD_DEBUG_PRINT_FILTER(AUTOCHK),
KD_DEBUG_PRINT_FILTER(DCOMSS),
KD_DEBUG_PRINT_FILTER(UNIMODEM),
KD_DEBUG_PRINT_FILTER(SIS),
KD_DEBUG_PRINT_FILTER(FLTMGR),
KD_DEBUG_PRINT_FILTER(WMICORE),
KD_DEBUG_PRINT_FILTER(BURNENG),
KD_DEBUG_PRINT_FILTER(IMAPI),
KD_DEBUG_PRINT_FILTER(SXS),
KD_DEBUG_PRINT_FILTER(FUSION),
KD_DEBUG_PRINT_FILTER(IDLETASK),
KD_DEBUG_PRINT_FILTER(SOFTPCI),
KD_DEBUG_PRINT_FILTER(TAPE),
KD_DEBUG_PRINT_FILTER(MCHGR),
KD_DEBUG_PRINT_FILTER(IDEP),
KD_DEBUG_PRINT_FILTER(PCIIDE),
KD_DEBUG_PRINT_FILTER(FLOPPY),
KD_DEBUG_PRINT_FILTER(FDC),
KD_DEBUG_PRINT_FILTER(TERMSRV),
KD_DEBUG_PRINT_FILTER(W32TIME),
KD_DEBUG_PRINT_FILTER(PREFETCHER),
KD_DEBUG_PRINT_FILTER(RSFILTER),
KD_DEBUG_PRINT_FILTER(FCPORT),
KD_DEBUG_PRINT_FILTER(PCI),
KD_DEBUG_PRINT_FILTER(DMIO),
KD_DEBUG_PRINT_FILTER(DMCONFIG),
KD_DEBUG_PRINT_FILTER(DMADMIN),
KD_DEBUG_PRINT_FILTER(WSOCKTRANSPORT),
KD_DEBUG_PRINT_FILTER(VSS),
KD_DEBUG_PRINT_FILTER(PNPMEM),
KD_DEBUG_PRINT_FILTER(PROCESSOR),
KD_DEBUG_PRINT_FILTER(DMSERVER),
KD_DEBUG_PRINT_FILTER(SR),
KD_DEBUG_PRINT_FILTER(INFINIBAND),
KD_DEBUG_PRINT_FILTER(IHVDRIVER),
KD_DEBUG_PRINT_FILTER(IHVVIDEO),
KD_DEBUG_PRINT_FILTER(IHVAUDIO),
KD_DEBUG_PRINT_FILTER(IHVNETWORK),
KD_DEBUG_PRINT_FILTER(IHVSTREAMING),
KD_DEBUG_PRINT_FILTER(IHVBUS),
KD_DEBUG_PRINT_FILTER(HPS),
KD_DEBUG_PRINT_FILTER(RTLTHREADPOOL),
KD_DEBUG_PRINT_FILTER(LDR),
KD_DEBUG_PRINT_FILTER(TCPIP6),
KD_DEBUG_PRINT_FILTER(ISAPNP),
KD_DEBUG_PRINT_FILTER(SHPC),
KD_DEBUG_PRINT_FILTER(STORPORT),
KD_DEBUG_PRINT_FILTER(STORMINIPORT),
KD_DEBUG_PRINT_FILTER(PRINTSPOOLER),
KD_DEBUG_PRINT_FILTER(VSSDYNDISK),
KD_DEBUG_PRINT_FILTER(VERIFIER),
KD_DEBUG_PRINT_FILTER(VDS),
KD_DEBUG_PRINT_FILTER(VDSBAS),
KD_DEBUG_PRINT_FILTER(VDSDYN), // Specified in Vista+
KD_DEBUG_PRINT_FILTER(VDSDYNDR),
KD_DEBUG_PRINT_FILTER(VDSLDR), // Specified in Vista+
KD_DEBUG_PRINT_FILTER(VDSUTIL),
KD_DEBUG_PRINT_FILTER(DFRGIFC),
KD_DEBUG_PRINT_FILTER(MM),
KD_DEBUG_PRINT_FILTER(DFSC),
KD_DEBUG_PRINT_FILTER(WOW64),
//
// Components specified in Vista+, some of which we also use in ReactOS
//
KD_DEBUG_PRINT_FILTER(ALPC),
KD_DEBUG_PRINT_FILTER(WDI),
KD_DEBUG_PRINT_FILTER(PERFLIB),
KD_DEBUG_PRINT_FILTER(KTM),
KD_DEBUG_PRINT_FILTER(IOSTRESS),
KD_DEBUG_PRINT_FILTER(HEAP),
KD_DEBUG_PRINT_FILTER(WHEA),
KD_DEBUG_PRINT_FILTER(USERGDI),
KD_DEBUG_PRINT_FILTER(MMCSS),
KD_DEBUG_PRINT_FILTER(TPM),
KD_DEBUG_PRINT_FILTER(THREADORDER),
KD_DEBUG_PRINT_FILTER(ENVIRON),
KD_DEBUG_PRINT_FILTER(EMS),
KD_DEBUG_PRINT_FILTER(WDT),
KD_DEBUG_PRINT_FILTER(FVEVOL),
KD_DEBUG_PRINT_FILTER(NDIS),
KD_DEBUG_PRINT_FILTER(NVCTRACE),
KD_DEBUG_PRINT_FILTER(LUAFV),
KD_DEBUG_PRINT_FILTER(APPCOMPAT),
KD_DEBUG_PRINT_FILTER(USBSTOR),
KD_DEBUG_PRINT_FILTER(SBP2PORT),
KD_DEBUG_PRINT_FILTER(COVERAGE),
KD_DEBUG_PRINT_FILTER(CACHEMGR),
KD_DEBUG_PRINT_FILTER(MOUNTMGR),
KD_DEBUG_PRINT_FILTER(CFR),
KD_DEBUG_PRINT_FILTER(TXF),
KD_DEBUG_PRINT_FILTER(KSECDD),
KD_DEBUG_PRINT_FILTER(FLTREGRESS),
KD_DEBUG_PRINT_FILTER(MPIO),
KD_DEBUG_PRINT_FILTER(MSDSM),
KD_DEBUG_PRINT_FILTER(UDFS),
KD_DEBUG_PRINT_FILTER(PSHED),
KD_DEBUG_PRINT_FILTER(STORVSP),
KD_DEBUG_PRINT_FILTER(LSASS),
KD_DEBUG_PRINT_FILTER(SSPICLI),
KD_DEBUG_PRINT_FILTER(CNG),
KD_DEBUG_PRINT_FILTER(EXFAT),
KD_DEBUG_PRINT_FILTER(FILETRACE),
KD_DEBUG_PRINT_FILTER(XSAVE),
KD_DEBUG_PRINT_FILTER(SE),
KD_DEBUG_PRINT_FILTER(DRIVEEXTENDER),
//
// Components specified in Windows 8
//
KD_DEBUG_PRINT_FILTER(POWER),
KD_DEBUG_PRINT_FILTER(CRASHDUMPXHCI),
KD_DEBUG_PRINT_FILTER(GPIO),
KD_DEBUG_PRINT_FILTER(REFS),
KD_DEBUG_PRINT_FILTER(WER),
//
// Components specified in Windows 10
//
KD_DEBUG_PRINT_FILTER(CAPIMG),
KD_DEBUG_PRINT_FILTER(VPCI),
KD_DEBUG_PRINT_FILTER(STORAGECLASSMEMORY),
KD_DEBUG_PRINT_FILTER(FSLIB),
};
#undef KD_DEBUG_PRINT_FILTER
//
// Command Table
//
static const struct
{
PCHAR Name;
PCHAR Syntax;
PCHAR Help;
BOOLEAN (*Fn)(ULONG Argc, PCHAR Argv[]);
} KdbDebuggerCommands[] = {
/* Data */
{ NULL, NULL, "Data", NULL },
{ "?", "? expression", "Evaluate expression.", KdbpCmdEvalExpression },
#ifdef _M_IX86 // FIXME: this is broken on x64
{ "disasm", "disasm [address] [L count]", "Disassemble count instructions at address.", KdbpCmdDisassembleX },
#endif // _M_IX86
{ "x", "x [address] [L count]", "Display count dwords, starting at address.", KdbpCmdDisassembleX },
{ "regs", "regs", "Display general purpose registers.", KdbpCmdRegs },
{ "sregs", "sregs", "Display status registers.", KdbpCmdRegs },
{ "dregs", "dregs", "Display debug registers.", KdbpCmdRegs },
{ "bt", "bt [*frameaddr|thread id]", "Prints current backtrace or from given frame address.", KdbpCmdBackTrace },
#ifdef __ROS_DWARF__
{ "dt", "dt [mod] [type] [addr]", "Print a struct. The address is optional.", KdbpCmdPrintStruct },
#endif
/* Flow control */
{ NULL, NULL, "Flow control", NULL },
{ "cont", "cont", "Continue execution (leave debugger).", KdbpCmdContinue },
{ "step", "step [count]", "Execute single instructions, stepping into interrupts.", KdbpCmdStep },
{ "next", "next [count]", "Execute single instructions, skipping calls and reps.", KdbpCmdStep },
{ "bl", "bl", "List breakpoints.", KdbpCmdBreakPointList },
{ "be", "be [breakpoint]", "Enable breakpoint.", KdbpCmdEnableDisableClearBreakPoint },
{ "bd", "bd [breakpoint]", "Disable breakpoint.", KdbpCmdEnableDisableClearBreakPoint },
{ "bc", "bc [breakpoint]", "Clear breakpoint.", KdbpCmdEnableDisableClearBreakPoint },
{ "bpx", "bpx [address] [IF condition]", "Set software execution breakpoint at address.", KdbpCmdBreakPoint },
{ "bpm", "bpm [r|w|rw|x] [byte|word|dword] [address] [IF condition]", "Set memory breakpoint at address.", KdbpCmdBreakPoint },
/* Process/Thread */
{ NULL, NULL, "Process/Thread", NULL },
{ "thread", "thread [list[ pid]|[attach ]tid]", "List threads in current or specified process, display thread with given id or attach to thread.", KdbpCmdThread },
{ "proc", "proc [list|[attach ]pid]", "List processes, display process with given id or attach to process.", KdbpCmdProc },
/* System information */
{ NULL, NULL, "System info", NULL },
{ "mod", "mod [address]", "List all modules or the one containing address.", KdbpCmdMod },
{ "gdt", "gdt", "Display the global descriptor table.", KdbpCmdGdtLdtIdt },
{ "ldt", "ldt", "Display the local descriptor table.", KdbpCmdGdtLdtIdt },
{ "idt", "idt", "Display the interrupt descriptor table.", KdbpCmdGdtLdtIdt },
{ "pcr", "pcr", "Display the processor control region.", KdbpCmdPcr },
#ifdef _M_IX86
{ "tss", "tss [selector|*descaddr]", "Display the current task state segment, or the one specified by its selector number or descriptor address.", KdbpCmdTss },
#endif
/* Others */
{ NULL, NULL, "Others", NULL },
{ "bugcheck", "bugcheck", "Bugchecks the system.", KdbpCmdBugCheck },
{ "reboot", "reboot", "Reboots the system.", KdbpCmdReboot},
{ "filter", "filter [error|warning|trace|info|level]+|-[componentname|default]", "Enable/disable debug channels.", KdbpCmdFilter },
{ "set", "set [var] [value]", "Sets var to value or displays value of var.", KdbpCmdSet },
{ "dmesg", "dmesg", "Display debug messages on screen, with navigation on pages.", KdbpCmdDmesg },
{ "kmsg", "kmsg", "Kernel dmesg. Alias for dmesg.", KdbpCmdDmesg },
{ "help", "help", "Display help screen.", KdbpCmdHelp },
{ "!pool", "!pool [Address [Flags]]", "Display information about pool allocations.", ExpKdbgExtPool },
{ "!poolused", "!poolused [Flags [Tag]]", "Display pool usage.", ExpKdbgExtPoolUsed },
{ "!poolfind", "!poolfind Tag [Pool]", "Search for pool tag allocations.", ExpKdbgExtPoolFind },
{ "!filecache", "!filecache", "Display cache usage.", ExpKdbgExtFileCache },
{ "!defwrites", "!defwrites", "Display cache write values.", ExpKdbgExtDefWrites },
{ "!irpfind", "!irpfind [Pool [startaddress [criteria data]]]", "Lists IRPs potentially matching criteria.", ExpKdbgExtIrpFind },
{ "!handle", "!handle [Handle]", "Displays info about handles.", ExpKdbgExtHandle },
};
/* FUNCTIONS *****************************************************************/
/*!\brief Evaluates an expression...
*
* Much like KdbpRpnEvaluateExpression, but prints the error message (if any)
* at the given offset.
*
* \param Expression Expression to evaluate.
* \param ErrOffset Offset (in characters) to print the error message at.
* \param Result Receives the result on success.
*
* \retval TRUE Success.
* \retval FALSE Failure.
*/
static BOOLEAN
KdbpEvaluateExpression(
IN PCHAR Expression,
IN LONG ErrOffset,
OUT PULONGLONG Result)
{
static CHAR ErrMsgBuffer[130] = "^ ";
LONG ExpressionErrOffset = -1;
PCHAR ErrMsg = ErrMsgBuffer;
BOOLEAN Ok;
Ok = KdbpRpnEvaluateExpression(Expression, KdbCurrentTrapFrame, Result,
&ExpressionErrOffset, ErrMsgBuffer + 2);
if (!Ok)
{
if (ExpressionErrOffset >= 0)
ExpressionErrOffset += ErrOffset;
else
ErrMsg += 2;
KdbpPrint("%*s%s\n", ExpressionErrOffset, "", ErrMsg);
}
return Ok;
}
BOOLEAN
NTAPI
KdbpGetHexNumber(
IN PCHAR pszNum,
OUT ULONG_PTR *pulValue)
{
char *endptr;
/* Skip optional '0x' prefix */
if ((pszNum[0] == '0') && ((pszNum[1] == 'x') || (pszNum[1] == 'X')))
pszNum += 2;
/* Make a number from the string (hex) */
*pulValue = strtoul(pszNum, &endptr, 16);
return (*endptr == '\0');
}
/*!\brief Evaluates an expression and displays the result.
*/
static BOOLEAN
KdbpCmdEvalExpression(
ULONG Argc,
PCHAR Argv[])
{
ULONG i;
SIZE_T len;
ULONGLONG Result = 0;
ULONG ul;
LONG l = 0;
BOOLEAN Ok;
if (Argc < 2)
{
KdbpPrint("?: Argument required\n");
return TRUE;
}
/* Put the arguments back together */
Argc--;
for (i = 1; i < Argc; i++)
{
len = strlen(Argv[i]);
Argv[i][len] = ' ';
}
/* Evaluate the expression */
Ok = KdbpEvaluateExpression(Argv[1], KdbPromptStr.Length + (Argv[1]-Argv[0]), &Result);
if (Ok)
{
if (Result > 0x00000000ffffffffLL)
{
if (Result & 0x8000000000000000LL)
KdbpPrint("0x%016I64x %20I64u %20I64d\n", Result, Result, Result);
else
KdbpPrint("0x%016I64x %20I64u\n", Result, Result);
}
else
{
ul = (ULONG)Result;
if (ul <= 0xff && ul >= 0x80)
l = (LONG)((CHAR)ul);
else if (ul <= 0xffff && ul >= 0x8000)
l = (LONG)((SHORT)ul);
else
l = (LONG)ul;
if (l < 0)
KdbpPrint("0x%08lx %10lu %10ld\n", ul, ul, l);
else
KdbpPrint("0x%08lx %10lu\n", ul, ul);
}
}
return TRUE;
}
#ifdef __ROS_DWARF__
/*!\brief Print a struct
*/
static VOID
KdbpPrintStructInternal
(PROSSYM_INFO Info,
PCHAR Indent,
BOOLEAN DoRead,
PVOID BaseAddress,
PROSSYM_AGGREGATE Aggregate)
{
ULONG i;
ULONGLONG Result;
PROSSYM_AGGREGATE_MEMBER Member;
ULONG IndentLen = strlen(Indent);
ROSSYM_AGGREGATE MemberAggregate = {0 };
for (i = 0; i < Aggregate->NumElements; i++) {
Member = &Aggregate->Elements[i];
KdbpPrint("%s%p+%x: %s", Indent, ((PCHAR)BaseAddress) + Member->BaseOffset, Member->Size, Member->Name ? Member->Name : "<anoymous>");
if (DoRead) {
if (!strcmp(Member->Type, "_UNICODE_STRING")) {
KdbpPrint("\"");
KdbpPrintUnicodeString(((PCHAR)BaseAddress) + Member->BaseOffset);
KdbpPrint("\"\n");
continue;
} else if (!strcmp(Member->Type, "PUNICODE_STRING")) {
KdbpPrint("\"");
KdbpPrintUnicodeString(*(((PUNICODE_STRING*)((PCHAR)BaseAddress) + Member->BaseOffset)));
KdbpPrint("\"\n");
continue;
}
switch (Member->Size) {
case 1:
case 2:
case 4:
case 8: {
Result = 0;
if (NT_SUCCESS(KdbpSafeReadMemory(&Result, ((PCHAR)BaseAddress) + Member->BaseOffset, Member->Size))) {
if (Member->Bits) {
Result >>= Member->FirstBit;
Result &= ((1 << Member->Bits) - 1);
}
KdbpPrint(" %lx\n", Result);
}
else goto readfail;
break;
}
default: {
if (Member->Size < 8) {
if (NT_SUCCESS(KdbpSafeReadMemory(&Result, ((PCHAR)BaseAddress) + Member->BaseOffset, Member->Size))) {
ULONG j;
for (j = 0; j < Member->Size; j++) {
KdbpPrint(" %02x", (int)(Result & 0xff));
Result >>= 8;
}
} else goto readfail;
} else {
KdbpPrint(" %s @ %p {\n", Member->Type, ((PCHAR)BaseAddress) + Member->BaseOffset);
Indent[IndentLen] = ' ';
if (RosSymAggregate(Info, Member->Type, &MemberAggregate)) {
KdbpPrintStructInternal(Info, Indent, DoRead, ((PCHAR)BaseAddress) + Member->BaseOffset, &MemberAggregate);
RosSymFreeAggregate(&MemberAggregate);
}
Indent[IndentLen] = 0;
KdbpPrint("%s}\n", Indent);
} break;
}
}
} else {
readfail:
if (Member->Size <= 8) {
KdbpPrint(" ??\n");
} else {
KdbpPrint(" %s @ %x {\n", Member->Type, Member->BaseOffset);
Indent[IndentLen] = ' ';
if (RosSymAggregate(Info, Member->Type, &MemberAggregate)) {
KdbpPrintStructInternal(Info, Indent, DoRead, BaseAddress, &MemberAggregate);
RosSymFreeAggregate(&MemberAggregate);
}
Indent[IndentLen] = 0;
KdbpPrint("%s}\n", Indent);
}
}
}
}
PROSSYM_INFO KdbpSymFindCachedFile(PUNICODE_STRING ModName);
static BOOLEAN
KdbpCmdPrintStruct(
ULONG Argc,
PCHAR Argv[])
{
ULONG i;
ULONGLONG Result = 0;
PVOID BaseAddress = NULL;
ROSSYM_AGGREGATE Aggregate = {0};
UNICODE_STRING ModName = {0};
ANSI_STRING AnsiName = {0};
CHAR Indent[100] = {0};
PROSSYM_INFO Info;
if (Argc < 3) goto end;
AnsiName.Length = AnsiName.MaximumLength = strlen(Argv[1]);
AnsiName.Buffer = Argv[1];
RtlAnsiStringToUnicodeString(&ModName, &AnsiName, TRUE);
Info = KdbpSymFindCachedFile(&ModName);
if (!Info || !RosSymAggregate(Info, Argv[2], &Aggregate)) {
DPRINT1("Could not get aggregate\n");
goto end;
}
// Get an argument for location if it was given
if (Argc > 3) {
ULONG len;
PCHAR ArgStart = Argv[3];
DPRINT("Trying to get expression\n");
for (i = 3; i < Argc - 1; i++)
{
len = strlen(Argv[i]);
Argv[i][len] = ' ';
}
/* Evaluate the expression */
DPRINT("Arg: %s\n", ArgStart);
if (KdbpEvaluateExpression(ArgStart, strlen(ArgStart), &Result))
BaseAddress = (PVOID)(ULONG_PTR)Result;
}
DPRINT("BaseAddress: %p\n", BaseAddress);
KdbpPrintStructInternal(Info, Indent, !!BaseAddress, BaseAddress, &Aggregate);
end:
RosSymFreeAggregate(&Aggregate);
RtlFreeUnicodeString(&ModName);
return TRUE;
}
#endif // __ROS_DWARF__
/*!\brief Retrieves the component ID corresponding to a given component name.
*
* \param ComponentName The name of the component.
* \param ComponentId Receives the component id on success.
*
* \retval TRUE Success.
* \retval FALSE Failure.
*/
static BOOLEAN
KdbpGetComponentId(
IN PCSTR ComponentName,
OUT PULONG ComponentId)
{
ULONG i;
for (i = 0; i < RTL_NUMBER_OF(ComponentTable); i++)
{
if (_stricmp(ComponentName, ComponentTable[i].Name) == 0)
{
*ComponentId = ComponentTable[i].Id;
return TRUE;
}
}
return FALSE;
}
/*!\brief Displays the list of active debug channels, or enable/disable debug channels.
*/
static BOOLEAN
KdbpCmdFilter(
ULONG Argc,
PCHAR Argv[])
{
ULONG i, j, ComponentId, Level;
ULONG set = DPFLTR_MASK, clear = DPFLTR_MASK;
PCHAR pend;
PCSTR opt, p;
static struct
{
PCSTR Name;
ULONG Level;
}
debug_classes[] =
{
{ "error", 1 << DPFLTR_ERROR_LEVEL },
{ "warning", 1 << DPFLTR_WARNING_LEVEL },
{ "trace", 1 << DPFLTR_TRACE_LEVEL },
{ "info", 1 << DPFLTR_INFO_LEVEL },
};
if (Argc <= 1)
{
/* Display the list of available debug filter components */
KdbpPrint("REMARKS:\n"
"- The 'WIN2000' system-wide debug filter component is used for DbgPrint()\n"
" messages without Component ID and Level.\n"
"- The 'DEFAULT' debug filter component is used for DbgPrint() messages with\n"
" an unknown Component ID.\n\n");
KdbpPrint("The list of debug filter components currently available on your system is:\n\n");
KdbpPrint(" Component Name Component ID\n"
" ================== ================\n");
for (i = 0; i < RTL_NUMBER_OF(ComponentTable); i++)
{
KdbpPrint("%20s 0x%08lx\n", ComponentTable[i].Name, ComponentTable[i].Id);
}
return TRUE;
}
for (i = 1; i < Argc; i++)
{
opt = Argv[i];
p = opt + strcspn(opt, "+-");
if (!p[0]) p = opt; /* Assume it's a debug channel name */
if (p > opt)
{
for (j = 0; j < RTL_NUMBER_OF(debug_classes); j++)
{
SIZE_T len = strlen(debug_classes[j].Name);
if (len != (p - opt))
continue;
if (_strnicmp(opt, debug_classes[j].Name, len) == 0) /* Found it */
{
if (*p == '+')
set |= debug_classes[j].Level;
else
clear |= debug_classes[j].Level;
break;
}
}
if (j == RTL_NUMBER_OF(debug_classes))
{
Level = strtoul(opt, &pend, 0);
if (pend != p)
{
KdbpPrint("filter: bad class name '%.*s'\n", p - opt, opt);
continue;
}
if (*p == '+')
set |= Level;
else
clear |= Level;
}
}
else
{
if (*p == '-')
clear = MAXULONG;
else
set = MAXULONG;
}
if (*p == '+' || *p == '-')
p++;
if (!KdbpGetComponentId(p, &ComponentId))
{
KdbpPrint("filter: '%s' is not a valid component name!\n", p);
return TRUE;
}
/* Get current mask value */
NtSetDebugFilterState(ComponentId, set, TRUE);
NtSetDebugFilterState(ComponentId, clear, FALSE);
}
return TRUE;
}
/*!\brief Disassembles 10 instructions at eip or given address or
* displays 16 dwords from memory at given address.
*/
static BOOLEAN
KdbpCmdDisassembleX(
ULONG Argc,
PCHAR Argv[])
{
ULONG Count;
ULONG ul;
INT i;
ULONGLONG Result = 0;
ULONG_PTR Address = KeGetContextPc(KdbCurrentTrapFrame);
LONG InstLen;
if (Argv[0][0] == 'x') /* display memory */
Count = 16;
else /* disassemble */
Count = 10;
if (Argc >= 2)
{
/* Check for [L count] part */
ul = 0;
if (strcmp(Argv[Argc-2], "L") == 0)
{
ul = strtoul(Argv[Argc-1], NULL, 0);
if (ul > 0)
{
Count = ul;
Argc -= 2;
}
}
else if (Argv[Argc-1][0] == 'L')
{
ul = strtoul(Argv[Argc-1] + 1, NULL, 0);
if (ul > 0)
{
Count = ul;
Argc--;
}
}
/* Put the remaining arguments back together */
Argc--;
for (ul = 1; ul < Argc; ul++)
{
Argv[ul][strlen(Argv[ul])] = ' ';
}
Argc++;
}
/* Evaluate the expression */
if (Argc > 1)
{
if (!KdbpEvaluateExpression(Argv[1], KdbPromptStr.Length + (Argv[1]-Argv[0]), &Result))
return TRUE;
if (Result > (ULONGLONG)(~((ULONG_PTR)0)))
KdbpPrint("Warning: Address %I64x is beeing truncated\n",Result);
Address = (ULONG_PTR)Result;
}
else if (Argv[0][0] == 'x')
{
KdbpPrint("x: Address argument required.\n");
return TRUE;
}
if (Argv[0][0] == 'x')
{
/* Display dwords */
ul = 0;
while (Count > 0)
{
if (!KdbSymPrintAddress((PVOID)Address, NULL))
KdbpPrint("<%p>:", (PVOID)Address);
else
KdbpPrint(":");
i = min(4, Count);
Count -= i;
while (--i >= 0)
{
if (!NT_SUCCESS(KdbpSafeReadMemory(&ul, (PVOID)Address, sizeof(ul))))
KdbpPrint(" ????????");
else
KdbpPrint(" %08x", ul);
Address += sizeof(ul);
}
KdbpPrint("\n");
}
}
else
{
/* Disassemble */
while (Count-- > 0)
{
if (!KdbSymPrintAddress((PVOID)Address, NULL))
KdbpPrint("<%08x>: ", Address);
else
KdbpPrint(": ");
InstLen = KdbpDisassemble(Address, KdbUseIntelSyntax);
if (InstLen < 0)
{
KdbpPrint("<INVALID>\n");
return TRUE;
}
KdbpPrint("\n");
Address += InstLen;
}
}
return TRUE;
}
/*!\brief Displays CPU registers.
*/
static BOOLEAN
KdbpCmdRegs(
ULONG Argc,
PCHAR Argv[])
{
PCONTEXT Context = KdbCurrentTrapFrame;
INT i;
static const PCHAR EflagsBits[32] = { " CF", NULL, " PF", " BIT3", " AF", " BIT5",
" ZF", " SF", " TF", " IF", " DF", " OF",
NULL, NULL, " NT", " BIT15", " RF", " VF",
" AC", " VIF", " VIP", " ID", " BIT22",
" BIT23", " BIT24", " BIT25", " BIT26",
" BIT27", " BIT28", " BIT29", " BIT30",
" BIT31" };
if (Argv[0][0] == 'r') /* regs */
{
#ifdef _M_IX86
KdbpPrint("CS:EIP 0x%04x:0x%08x\n"
"SS:ESP 0x%04x:0x%08x\n"
" EAX 0x%08x EBX 0x%08x\n"
" ECX 0x%08x EDX 0x%08x\n"
" ESI 0x%08x EDI 0x%08x\n"
" EBP 0x%08x\n",
Context->SegCs & 0xFFFF, Context->Eip,
Context->SegSs, Context->Esp,
Context->Eax, Context->Ebx,
Context->Ecx, Context->Edx,
Context->Esi, Context->Edi,
Context->Ebp);
#else
KdbpPrint("CS:RIP 0x%04x:0x%p\n"
"SS:RSP 0x%04x:0x%p\n"
" RAX 0x%p RBX 0x%p\n"
" RCX 0x%p RDX 0x%p\n"
" RSI 0x%p RDI 0x%p\n"
" RBP 0x%p\n",
Context->SegCs & 0xFFFF, Context->Rip,
Context->SegSs, Context->Rsp,
Context->Rax, Context->Rbx,
Context->Rcx, Context->Rdx,
Context->Rsi, Context->Rdi,
Context->Rbp);
#endif
/* Display the EFlags */
KdbpPrint("EFLAGS 0x%08x ", Context->EFlags);
for (i = 0; i < 32; i++)
{
if (i == 1)
{
if ((Context->EFlags & (1 << 1)) == 0)
KdbpPrint(" !BIT1");
}
else if (i == 12)
{
KdbpPrint(" IOPL%d", (Context->EFlags >> 12) & 3);
}
else if (i == 13)
{
}
else if ((Context->EFlags & (1 << i)) != 0)
{
KdbpPrint(EflagsBits[i]);
}
}
KdbpPrint("\n");
}
else if (Argv[0][0] == 's') /* sregs */
{
KdbpPrint("CS 0x%04x Index 0x%04x %cDT RPL%d\n",
Context->SegCs & 0xffff, (Context->SegCs & 0xffff) >> 3,
(Context->SegCs & (1 << 2)) ? 'L' : 'G', Context->SegCs & 3);
KdbpPrint("DS 0x%04x Index 0x%04x %cDT RPL%d\n",
Context->SegDs, Context->SegDs >> 3, (Context->SegDs & (1 << 2)) ? 'L' : 'G', Context->SegDs & 3);
KdbpPrint("ES 0x%04x Index 0x%04x %cDT RPL%d\n",
Context->SegEs, Context->SegEs >> 3, (Context->SegEs & (1 << 2)) ? 'L' : 'G', Context->SegEs & 3);
KdbpPrint("FS 0x%04x Index 0x%04x %cDT RPL%d\n",
Context->SegFs, Context->SegFs >> 3, (Context->SegFs & (1 << 2)) ? 'L' : 'G', Context->SegFs & 3);
KdbpPrint("GS 0x%04x Index 0x%04x %cDT RPL%d\n",
Context->SegGs, Context->SegGs >> 3, (Context->SegGs & (1 << 2)) ? 'L' : 'G', Context->SegGs & 3);
KdbpPrint("SS 0x%04x Index 0x%04x %cDT RPL%d\n",
Context->SegSs, Context->SegSs >> 3, (Context->SegSs & (1 << 2)) ? 'L' : 'G', Context->SegSs & 3);
}
else /* dregs */
{
ASSERT(Argv[0][0] == 'd');
KdbpPrint("DR0 0x%08x\n"
"DR1 0x%08x\n"
"DR2 0x%08x\n"
"DR3 0x%08x\n"
"DR6 0x%08x\n"
"DR7 0x%08x\n",
Context->Dr0, Context->Dr1, Context->Dr2, Context->Dr3,
Context->Dr6, Context->Dr7);
}
return TRUE;
}
#ifdef _M_IX86
static PKTSS
KdbpRetrieveTss(
IN USHORT TssSelector,
OUT PULONG pType OPTIONAL,
IN PKDESCRIPTOR pGdtr OPTIONAL)
{
KDESCRIPTOR Gdtr;
KGDTENTRY Desc;
PKTSS Tss;
/* Retrieve the Global Descriptor Table (user-provided or system) */
if (pGdtr)
Gdtr = *pGdtr;
else
Ke386GetGlobalDescriptorTable(&Gdtr.Limit);
/* Check limits */
if ((TssSelector & (sizeof(KGDTENTRY) - 1)) ||
(TssSelector < sizeof(KGDTENTRY)) ||
(TssSelector + sizeof(KGDTENTRY) - 1 > Gdtr.Limit))
{
return NULL;
}
/* Retrieve the descriptor */
if (!NT_SUCCESS(KdbpSafeReadMemory(&Desc,
(PVOID)(Gdtr.Base + TssSelector),
sizeof(KGDTENTRY))))
{
return NULL;
}
/* Check for TSS32(Avl) or TSS32(Busy) */
if (Desc.HighWord.Bits.Type != 9 && Desc.HighWord.Bits.Type != 11)
{
return NULL;
}
if (pType) *pType = Desc.HighWord.Bits.Type;
Tss = (PKTSS)(ULONG_PTR)(Desc.BaseLow |
Desc.HighWord.Bytes.BaseMid << 16 |
Desc.HighWord.Bytes.BaseHi << 24);
return Tss;
}
FORCEINLINE BOOLEAN
KdbpIsNestedTss(
IN USHORT TssSelector,
IN PKTSS Tss)
{
USHORT Backlink;
if (!Tss)
return FALSE;
#ifdef _M_AMD64
// HACK
return FALSE;
#else
/* Retrieve the TSS Backlink */
if (!NT_SUCCESS(KdbpSafeReadMemory(&Backlink,
(PVOID)&Tss->Backlink,
sizeof(USHORT))))
{
return FALSE;
}
#endif
return (Backlink != 0 && Backlink != TssSelector);
}
static BOOLEAN
KdbpContextFromPrevTss(
IN OUT PCONTEXT Context,
OUT PUSHORT TssSelector,
IN OUT PKTSS* pTss,
IN PKDESCRIPTOR pGdtr)
{
ULONG_PTR Eip, Ebp;
USHORT Backlink;
PKTSS Tss = *pTss;
#ifdef _M_AMD64
// HACK
return FALSE;
#else
/* Retrieve the TSS Backlink */
if (!NT_SUCCESS(KdbpSafeReadMemory(&Backlink,
(PVOID)&Tss->Backlink,
sizeof(USHORT))))
{
return FALSE;
}
/* Retrieve the parent TSS */
Tss = KdbpRetrieveTss(Backlink, NULL, pGdtr);
if (!Tss)
return FALSE;
if (!NT_SUCCESS(KdbpSafeReadMemory(&Eip,
(PVOID)&Tss->Eip,
sizeof(ULONG_PTR))))
{
return FALSE;
}
if (!NT_SUCCESS(KdbpSafeReadMemory(&Ebp,
(PVOID)&Tss->Ebp,
sizeof(ULONG_PTR))))
{
return FALSE;
}
/* Return the parent TSS and its trap frame */
*TssSelector = Backlink;
*pTss = Tss;
Context->Eip = Eip;
Context->Ebp = Ebp;
#endif
return TRUE;
}
#endif // _M_IX86
#ifdef _M_AMD64
static
BOOLEAN
GetNextFrame(
_Inout_ PCONTEXT Context)
{
PRUNTIME_FUNCTION FunctionEntry;
ULONG64 ImageBase, EstablisherFrame;
PVOID HandlerData;
_SEH2_TRY
{
/* Lookup the FunctionEntry for the current RIP */
FunctionEntry = RtlLookupFunctionEntry(Context->Rip, &ImageBase, NULL);
if (FunctionEntry == NULL)
{
/* No function entry, so this must be a leaf function. Pop the return address from the stack.
Note: this can happen after the first frame as the result of an exception */
Context->Rip = *(DWORD64*)Context->Rsp;
Context->Rsp += sizeof(DWORD64);
return TRUE;
}
else
{
RtlVirtualUnwind(UNW_FLAG_NHANDLER,
ImageBase,
Context->Rip,
FunctionEntry,
Context,
&HandlerData,
&EstablisherFrame,
NULL);
}
}
_SEH2_EXCEPT(1)
{
return FALSE;
}
_SEH2_END
return TRUE;
}
static BOOLEAN
KdbpCmdBackTrace(
ULONG Argc,
PCHAR Argv[])
{
CONTEXT Context = *KdbCurrentTrapFrame;
/* Walk through the frames */
KdbpPrint("Frames:\n");
do
{
BOOLEAN GotNextFrame;
KdbpPrint("[%p] ", (PVOID)Context.Rsp);
/* Print the location after the call instruction */
if (!KdbSymPrintAddress((PVOID)Context.Rip, &Context))
KdbpPrint("<%p>", (PVOID)Context.Rip);
KdbpPrint("\n");
if (KdbOutputAborted)
break;
GotNextFrame = GetNextFrame(&Context);
if (!GotNextFrame)
{
KdbpPrint("Couldn't get next frame\n");
break;
}
} while ((Context.Rip != 0) && (Context.Rsp != 0));
return TRUE;
}
#else
/*!\brief Displays a backtrace.
*/
static BOOLEAN
KdbpCmdBackTrace(
ULONG Argc,
PCHAR Argv[])
{
ULONG ul;
ULONGLONG Result = 0;
CONTEXT Context = *KdbCurrentTrapFrame;
ULONG_PTR Frame = KeGetContextFrameRegister(&Context);
ULONG_PTR Address;
if (Argc >= 2)
{
/* Check for [L count] part */
ul = 0;
if (strcmp(Argv[Argc-2], "L") == 0)
{
ul = strtoul(Argv[Argc-1], NULL, 0);
if (ul > 0)
{
Argc -= 2;
}
}
else if (Argv[Argc-1][0] == 'L')
{
ul = strtoul(Argv[Argc-1] + 1, NULL, 0);
if (ul > 0)
{
Argc--;
}
}
/* Put the remaining arguments back together */
Argc--;
for (ul = 1; ul < Argc; ul++)
{
Argv[ul][strlen(Argv[ul])] = ' ';
}
Argc++;
}
/* Check if a Frame Address or Thread ID is given */
if (Argc > 1)
{
if (Argv[1][0] == '*')
{
Argv[1]++;
/* Evaluate the expression */
if (!KdbpEvaluateExpression(Argv[1], KdbPromptStr.Length + (Argv[1]-Argv[0]), &Result))
return TRUE;
if (Result > (ULONGLONG)(~((ULONG_PTR)0)))
KdbpPrint("Warning: Address %I64x is beeing truncated\n", Result);
Frame = (ULONG_PTR)Result;
}
else
{
KdbpPrint("Thread backtrace not supported yet!\n");
return TRUE;
}
}
#ifdef _M_IX86
KDESCRIPTOR Gdtr;
USHORT TssSelector;
PKTSS Tss;
/* Retrieve the Global Descriptor Table */
Ke386GetGlobalDescriptorTable(&Gdtr.Limit);
/* Retrieve the current (active) TSS */
TssSelector = Ke386GetTr();
Tss = KdbpRetrieveTss(TssSelector, NULL, &Gdtr);
if (KdbpIsNestedTss(TssSelector, Tss))
{
/* Display the active TSS if it is nested */
KdbpPrint("[Active TSS 0x%04x @ 0x%p]\n", TssSelector, Tss);
}
#endif
/* If no Frame Address or Thread ID was given, try printing the function at EIP */
if (Argc <= 1)
{
KdbpPrint("Eip:\n");
if (!KdbSymPrintAddress((PVOID)KeGetContextPc(&Context), &Context))
KdbpPrint("<%p>\n", KeGetContextPc(&Context));
else
KdbpPrint("\n");
}
/* Walk through the frames */
KdbpPrint("Frames:\n");
for (;;)
{
BOOLEAN GotNextFrame;
if (Frame == 0)
goto CheckForParentTSS;
Address = 0;
if (!NT_SUCCESS(KdbpSafeReadMemory(&Address, (PVOID)(Frame + sizeof(ULONG_PTR)), sizeof(ULONG_PTR))))
{
KdbpPrint("Couldn't access memory at 0x%p!\n", Frame + sizeof(ULONG_PTR));
goto CheckForParentTSS;
}
if (Address == 0)
goto CheckForParentTSS;
GotNextFrame = NT_SUCCESS(KdbpSafeReadMemory(&Frame, (PVOID)Frame, sizeof(ULONG_PTR)));
if (GotNextFrame)
{
KeSetContextFrameRegister(&Context, Frame);
}
// else
// Frame = 0;
/* Print the location of the call instruction (assumed 5 bytes length) */
if (!KdbSymPrintAddress((PVOID)(Address - 5), &Context))
KdbpPrint("<%08x>\n", Address);
else
KdbpPrint("\n");
if (KdbOutputAborted)
break;
if (!GotNextFrame)
{
KdbpPrint("Couldn't access memory at 0x%p!\n", Frame);
goto CheckForParentTSS; // break;
}
continue;
CheckForParentTSS:
#ifndef _M_IX86
break;
#else
/*
* We have ended the stack walking for the current (active) TSS.
* Check whether this TSS was nested, and if so switch to its parent
* and walk its stack.
*/
if (!KdbpIsNestedTss(TssSelector, Tss))
break; // The TSS is not nested, we stop there.
GotNextFrame = KdbpContextFromPrevTss(&Context, &TssSelector, &Tss, &Gdtr);
if (!GotNextFrame)
{
KdbpPrint("Couldn't access parent TSS 0x%04x\n", Tss->Backlink);
break; // Cannot retrieve the parent TSS, we stop there.
}
Address = Context.Eip;
Frame = Context.Ebp;
KdbpPrint("[Parent TSS 0x%04x @ 0x%p]\n", TssSelector, Tss);
if (!KdbSymPrintAddress((PVOID)Address, &Context))
KdbpPrint("<%08x>\n", Address);
else
KdbpPrint("\n");
#endif
}
return TRUE;
}
#endif // M_AMD64
/*!\brief Continues execution of the system/leaves KDB.
*/
static BOOLEAN
KdbpCmdContinue(
ULONG Argc,
PCHAR Argv[])
{
/* Exit the main loop */
return FALSE;
}
/*!\brief Continues execution of the system/leaves KDB.
*/
static BOOLEAN
KdbpCmdStep(
ULONG Argc,
PCHAR Argv[])
{
ULONG Count = 1;
if (Argc > 1)
{
Count = strtoul(Argv[1], NULL, 0);
if (Count == 0)
{
KdbpPrint("%s: Integer argument required\n", Argv[0]);
return TRUE;
}
}
if (Argv[0][0] == 'n')
KdbSingleStepOver = TRUE;
else
KdbSingleStepOver = FALSE;
/* Set the number of single steps and return to the interrupted code. */
KdbNumSingleSteps = Count;
return FALSE;
}
/*!\brief Lists breakpoints.
*/
static BOOLEAN
KdbpCmdBreakPointList(
ULONG Argc,
PCHAR Argv[])
{
LONG l;
ULONG_PTR Address = 0;
KDB_BREAKPOINT_TYPE Type = 0;
KDB_ACCESS_TYPE AccessType = 0;
UCHAR Size = 0;
UCHAR DebugReg = 0;
BOOLEAN Enabled = FALSE;
BOOLEAN Global = FALSE;
PEPROCESS Process = NULL;
PCHAR str1, str2, ConditionExpr, GlobalOrLocal;
CHAR Buffer[20];
l = KdbpGetNextBreakPointNr(0);
if (l < 0)
{
KdbpPrint("No breakpoints.\n");
return TRUE;
}
KdbpPrint("Breakpoints:\n");
do
{
if (!KdbpGetBreakPointInfo(l, &Address, &Type, &Size, &AccessType, &DebugReg,
&Enabled, &Global, &Process, &ConditionExpr))
{
continue;
}
if (l == KdbLastBreakPointNr)
{
str1 = "\x1b[1m*";
str2 = "\x1b[0m";
}
else
{
str1 = " ";
str2 = "";
}
if (Global)
{
GlobalOrLocal = " global";
}
else
{
GlobalOrLocal = Buffer;
sprintf(Buffer, " PID 0x%Ix",
(ULONG_PTR)(Process ? Process->UniqueProcessId : INVALID_HANDLE_VALUE));
}
if (Type == KdbBreakPointSoftware || Type == KdbBreakPointTemporary)
{
KdbpPrint(" %s%03d BPX 0x%08x%s%s%s%s%s\n",
str1, l, Address,
Enabled ? "" : " disabled",
GlobalOrLocal,
ConditionExpr ? " IF " : "",
ConditionExpr ? ConditionExpr : "",
str2);
}
else if (Type == KdbBreakPointHardware)
{
if (!Enabled)
{
KdbpPrint(" %s%03d BPM 0x%08x %-5s %-5s disabled%s%s%s%s\n", str1, l, Address,
KDB_ACCESS_TYPE_TO_STRING(AccessType),
Size == 1 ? "byte" : (Size == 2 ? "word" : "dword"),
GlobalOrLocal,
ConditionExpr ? " IF " : "",
ConditionExpr ? ConditionExpr : "",
str2);
}
else
{
KdbpPrint(" %s%03d BPM 0x%08x %-5s %-5s DR%d%s%s%s%s\n", str1, l, Address,
KDB_ACCESS_TYPE_TO_STRING(AccessType),
Size == 1 ? "byte" : (Size == 2 ? "word" : "dword"),
DebugReg,
GlobalOrLocal,
ConditionExpr ? " IF " : "",
ConditionExpr ? ConditionExpr : "",
str2);
}
}
}
while ((l = KdbpGetNextBreakPointNr(l+1)) >= 0);
return TRUE;
}
/*!\brief Enables, disables or clears a breakpoint.
*/
static BOOLEAN
KdbpCmdEnableDisableClearBreakPoint(
ULONG Argc,
PCHAR Argv[])
{
PCHAR pend;
ULONG BreakPointNr;
if (Argc < 2)
{
KdbpPrint("%s: argument required\n", Argv[0]);
return TRUE;
}
pend = Argv[1];
BreakPointNr = strtoul(Argv[1], &pend, 0);
if (pend == Argv[1] || *pend != '\0')
{
KdbpPrint("%s: integer argument required\n", Argv[0]);
return TRUE;
}
if (Argv[0][1] == 'e') /* enable */
{
KdbpEnableBreakPoint(BreakPointNr, NULL);
}
else if (Argv [0][1] == 'd') /* disable */
{
KdbpDisableBreakPoint(BreakPointNr, NULL);
}
else /* clear */
{
ASSERT(Argv[0][1] == 'c');
KdbpDeleteBreakPoint(BreakPointNr, NULL);
}
return TRUE;
}
/*!\brief Sets a software or hardware (memory) breakpoint at the given address.
*/
static BOOLEAN
KdbpCmdBreakPoint(ULONG Argc, PCHAR Argv[])
{
ULONGLONG Result = 0;
ULONG_PTR Address;
KDB_BREAKPOINT_TYPE Type;
UCHAR Size = 0;
KDB_ACCESS_TYPE AccessType = 0;
ULONG AddressArgIndex, i;
LONG ConditionArgIndex;
BOOLEAN Global = TRUE;
if (Argv[0][2] == 'x') /* software breakpoint */
{
if (Argc < 2)
{
KdbpPrint("bpx: Address argument required.\n");
return TRUE;
}
AddressArgIndex = 1;
Type = KdbBreakPointSoftware;
}
else /* memory breakpoint */
{
ASSERT(Argv[0][2] == 'm');
if (Argc < 2)
{
KdbpPrint("bpm: Access type argument required (one of r, w, rw, x)\n");
return TRUE;
}
if (_stricmp(Argv[1], "x") == 0)
AccessType = KdbAccessExec;
else if (_stricmp(Argv[1], "r") == 0)
AccessType = KdbAccessRead;
else if (_stricmp(Argv[1], "w") == 0)
AccessType = KdbAccessWrite;
else if (_stricmp(Argv[1], "rw") == 0)
AccessType = KdbAccessReadWrite;
else
{
KdbpPrint("bpm: Unknown access type '%s'\n", Argv[1]);
return TRUE;
}
if (Argc < 3)
{
KdbpPrint("bpm: %s argument required.\n", AccessType == KdbAccessExec ? "Address" : "Memory size");
return TRUE;
}
AddressArgIndex = 3;
if (_stricmp(Argv[2], "byte") == 0)
Size = 1;
else if (_stricmp(Argv[2], "word") == 0)
Size = 2;
else if (_stricmp(Argv[2], "dword") == 0)
Size = 4;
else if (AccessType == KdbAccessExec)
{
Size = 1;
AddressArgIndex--;
}
else
{
KdbpPrint("bpm: Unknown memory size '%s'\n", Argv[2]);
return TRUE;
}
if (Argc <= AddressArgIndex)
{
KdbpPrint("bpm: Address argument required.\n");
return TRUE;
}
Type = KdbBreakPointHardware;
}
/* Put the arguments back together */
ConditionArgIndex = -1;
for (i = AddressArgIndex; i < (Argc-1); i++)
{
if (strcmp(Argv[i+1], "IF") == 0) /* IF found */
{
ConditionArgIndex = i + 2;
if ((ULONG)ConditionArgIndex >= Argc)
{
KdbpPrint("%s: IF requires condition expression.\n", Argv[0]);
return TRUE;
}
for (i = ConditionArgIndex; i < (Argc-1); i++)
Argv[i][strlen(Argv[i])] = ' ';
break;
}
Argv[i][strlen(Argv[i])] = ' ';
}
/* Evaluate the address expression */
if (!KdbpEvaluateExpression(Argv[AddressArgIndex],
KdbPromptStr.Length + (Argv[AddressArgIndex]-Argv[0]),
&Result))
{
return TRUE;
}
if (Result > (ULONGLONG)(~((ULONG_PTR)0)))
KdbpPrint("%s: Warning: Address %I64x is beeing truncated\n", Argv[0],Result);
Address = (ULONG_PTR)Result;
KdbpInsertBreakPoint(Address, Type, Size, AccessType,
(ConditionArgIndex < 0) ? NULL : Argv[ConditionArgIndex],
Global, NULL);
return TRUE;
}
/*!\brief Lists threads or switches to another thread context.
*/
static BOOLEAN
KdbpCmdThread(
ULONG Argc,
PCHAR Argv[])
{
PLIST_ENTRY Entry;
PETHREAD Thread = NULL;
PEPROCESS Process = NULL;
BOOLEAN ReferencedThread = FALSE, ReferencedProcess = FALSE;
PULONG_PTR Stack;
PULONG_PTR Frame;
ULONG_PTR Pc;
ULONG_PTR ul = 0;
PCHAR State, pend, str1, str2;
static const PCHAR ThreadStateToString[DeferredReady+1] =
{
"Initialized", "Ready", "Running",
"Standby", "Terminated", "Waiting",
"Transition", "DeferredReady"
};
ASSERT(KdbCurrentProcess);
if (Argc >= 2 && _stricmp(Argv[1], "list") == 0)
{
Process = KdbCurrentProcess;
if (Argc >= 3)
{
ul = strtoulptr(Argv[2], &pend, 0);
if (Argv[2] == pend)
{
KdbpPrint("thread: '%s' is not a valid process id!\n", Argv[2]);
return TRUE;
}
if (!NT_SUCCESS(PsLookupProcessByProcessId((PVOID)ul, &Process)))
{
KdbpPrint("thread: Invalid process id!\n");
return TRUE;
}
/* Remember our reference */
ReferencedProcess = TRUE;
}
Entry = Process->ThreadListHead.Flink;
if (Entry == &Process->ThreadListHead)
{
if (Argc >= 3)
KdbpPrint("No threads in process 0x%px!\n", (PVOID)ul);
else
KdbpPrint("No threads in current process!\n");
if (ReferencedProcess)
ObDereferenceObject(Process);
return TRUE;
}
KdbpPrint(" TID State Prior. Affinity EBP EIP\n");
do
{
Thread = CONTAINING_RECORD(Entry, ETHREAD, ThreadListEntry);
if (Thread == KdbCurrentThread)
{
str1 = "\x1b[1m*";
str2 = "\x1b[0m";
}
else
{
str1 = " ";
str2 = "";
}
if (!Thread->Tcb.InitialStack)
{
/* Thread has no kernel stack (probably terminated) */
Stack = Frame = NULL;
Pc = 0;
}
else if (Thread->Tcb.TrapFrame)
{
Stack = (PULONG_PTR)KeGetTrapFrameStackRegister(Thread->Tcb.TrapFrame);
Frame = (PULONG_PTR)KeGetTrapFrameFrameRegister(Thread->Tcb.TrapFrame);
Pc = KeGetTrapFramePc(Thread->Tcb.TrapFrame);
}
else
{
Stack = (PULONG_PTR)Thread->Tcb.KernelStack;
Frame = (PULONG_PTR)Stack[4];
Pc = 0;
if (Frame) /* FIXME: Should we attach to the process to read Ebp[1]? */
KdbpSafeReadMemory(&Pc, Frame + 1, sizeof(Pc));
}
if (Thread->Tcb.State < (DeferredReady + 1))
State = ThreadStateToString[Thread->Tcb.State];
else
State = "Unknown";
KdbpPrint(" %s0x%08x %-11s %3d 0x%08x 0x%08x 0x%08x%s\n",
str1,
Thread->Cid.UniqueThread,
State,
Thread->Tcb.Priority,
Thread->Tcb.Affinity,
Frame,
Pc,
str2);
Entry = Entry->Flink;
}
while (Entry != &Process->ThreadListHead);
/* Release our reference, if any */
if (ReferencedProcess)
ObDereferenceObject(Process);
}
else if (Argc >= 2 && _stricmp(Argv[1], "attach") == 0)
{
if (Argc < 3)
{
KdbpPrint("thread attach: thread id argument required!\n");
return TRUE;
}
ul = strtoulptr(Argv[2], &pend, 0);
if (Argv[2] == pend)
{
KdbpPrint("thread attach: '%s' is not a valid thread id!\n", Argv[2]);
return TRUE;
}
if (!KdbpAttachToThread((PVOID)ul))
{
return TRUE;
}
KdbpPrint("Attached to thread 0x%08x.\n", ul);
}
else
{
Thread = KdbCurrentThread;
if (Argc >= 2)
{
ul = strtoulptr(Argv[1], &pend, 0);
if (Argv[1] == pend)
{
KdbpPrint("thread: '%s' is not a valid thread id!\n", Argv[1]);
return TRUE;
}
if (!NT_SUCCESS(PsLookupThreadByThreadId((PVOID)ul, &Thread)))
{
KdbpPrint("thread: Invalid thread id!\n");
return TRUE;
}
/* Remember our reference */
ReferencedThread = TRUE;
}
if (Thread->Tcb.State < (DeferredReady + 1))
State = ThreadStateToString[Thread->Tcb.State];
else
State = "Unknown";
KdbpPrint("%s"
" TID: 0x%08x\n"
" State: %s (0x%x)\n"
" Priority: %d\n"
" Affinity: 0x%08x\n"
" Initial Stack: 0x%08x\n"
" Stack Limit: 0x%08x\n"
" Stack Base: 0x%08x\n"
" Kernel Stack: 0x%08x\n"
" Trap Frame: 0x%08x\n"
#ifndef _M_AMD64
" NPX State: %s (0x%x)\n"
#endif
, (Argc < 2) ? "Current Thread:\n" : ""
, Thread->Cid.UniqueThread
, State, Thread->Tcb.State
, Thread->Tcb.Priority
, Thread->Tcb.Affinity
, Thread->Tcb.InitialStack
, Thread->Tcb.StackLimit
, Thread->Tcb.StackBase
, Thread->Tcb.KernelStack
, Thread->Tcb.TrapFrame
#ifndef _M_AMD64
, NPX_STATE_TO_STRING(Thread->Tcb.NpxState), Thread->Tcb.NpxState
#endif
);
/* Release our reference if we had one */
if (ReferencedThread)
ObDereferenceObject(Thread);
}
return TRUE;
}
/*!\brief Lists processes or switches to another process context.
*/
static BOOLEAN
KdbpCmdProc(
ULONG Argc,
PCHAR Argv[])
{
PLIST_ENTRY Entry;
PEPROCESS Process;
BOOLEAN ReferencedProcess = FALSE;
PCHAR State, pend, str1, str2;
ULONG_PTR ul;
extern LIST_ENTRY PsActiveProcessHead;
if (Argc >= 2 && _stricmp(Argv[1], "list") == 0)
{
Entry = PsActiveProcessHead.Flink;
if (!Entry || Entry == &PsActiveProcessHead)
{
KdbpPrint("No processes in the system!\n");
return TRUE;
}
KdbpPrint(" PID State Filename\n");
do
{
Process = CONTAINING_RECORD(Entry, EPROCESS, ActiveProcessLinks);
if (Process == KdbCurrentProcess)
{
str1 = "\x1b[1m*";
str2 = "\x1b[0m";
}
else
{
str1 = " ";
str2 = "";
}
State = ((Process->Pcb.State == ProcessInMemory) ? "In Memory" :
((Process->Pcb.State == ProcessOutOfMemory) ? "Out of Memory" : "In Transition"));
KdbpPrint(" %s0x%08x %-10s %s%s\n",
str1,
Process->UniqueProcessId,
State,
Process->ImageFileName,
str2);
Entry = Entry->Flink;
}
while(Entry != &PsActiveProcessHead);
}
else if (Argc >= 2 && _stricmp(Argv[1], "attach") == 0)
{
if (Argc < 3)
{
KdbpPrint("process attach: process id argument required!\n");
return TRUE;
}
ul = strtoulptr(Argv[2], &pend, 0);
if (Argv[2] == pend)
{
KdbpPrint("process attach: '%s' is not a valid process id!\n", Argv[2]);
return TRUE;
}
if (!KdbpAttachToProcess((PVOID)ul))
{
return TRUE;
}
KdbpPrint("Attached to process 0x%p, thread 0x%p.\n", (PVOID)ul,
KdbCurrentThread->Cid.UniqueThread);
}
else
{
Process = KdbCurrentProcess;
if (Argc >= 2)
{
ul = strtoulptr(Argv[1], &pend, 0);
if (Argv[1] == pend)
{
KdbpPrint("proc: '%s' is not a valid process id!\n", Argv[1]);
return TRUE;
}
if (!NT_SUCCESS(PsLookupProcessByProcessId((PVOID)ul, &Process)))
{
KdbpPrint("proc: Invalid process id!\n");
return TRUE;
}
/* Remember our reference */
ReferencedProcess = TRUE;
}
State = ((Process->Pcb.State == ProcessInMemory) ? "In Memory" :
((Process->Pcb.State == ProcessOutOfMemory) ? "Out of Memory" : "In Transition"));
KdbpPrint("%s"
" PID: 0x%08x\n"
" State: %s (0x%x)\n"
" Image Filename: %s\n",
(Argc < 2) ? "Current process:\n" : "",
Process->UniqueProcessId,
State, Process->Pcb.State,
Process->ImageFileName);
/* Release our reference, if any */
if (ReferencedProcess)
ObDereferenceObject(Process);
}
return TRUE;
}
/*!\brief Lists loaded modules or the one containing the specified address.
*/
static BOOLEAN
KdbpCmdMod(
ULONG Argc,
PCHAR Argv[])
{
ULONGLONG Result = 0;
ULONG_PTR Address;
PLDR_DATA_TABLE_ENTRY LdrEntry;
BOOLEAN DisplayOnlyOneModule = FALSE;
INT i = 0;
if (Argc >= 2)
{
/* Put the arguments back together */
Argc--;
while (--Argc >= 1)
Argv[Argc][strlen(Argv[Argc])] = ' ';
/* Evaluate the expression */
if (!KdbpEvaluateExpression(Argv[1], KdbPromptStr.Length + (Argv[1]-Argv[0]), &Result))
{
return TRUE;
}
if (Result > (ULONGLONG)(~((ULONG_PTR)0)))
KdbpPrint("%s: Warning: Address %I64x is beeing truncated\n", Argv[0],Result);
Address = (ULONG_PTR)Result;
if (!KdbpSymFindModule((PVOID)Address, -1, &LdrEntry))
{
KdbpPrint("No module containing address 0x%p found!\n", Address);
return TRUE;
}
DisplayOnlyOneModule = TRUE;
}
else
{
if (!KdbpSymFindModule(NULL, 0, &LdrEntry))
{
ULONG_PTR ntoskrnlBase = (ULONG_PTR)__ImageBase;
KdbpPrint(" Base Size Name\n");
KdbpPrint(" %p %08x %s\n", (PVOID)ntoskrnlBase, 0, "ntoskrnl.exe");
return TRUE;
}
i = 1;
}
KdbpPrint(" Base Size Name\n");
for (;;)
{
KdbpPrint(" %p %08x ", LdrEntry->DllBase, LdrEntry->SizeOfImage);
KdbpPrintUnicodeString(&LdrEntry->BaseDllName);
KdbpPrint("\n");
if(DisplayOnlyOneModule || !KdbpSymFindModule(NULL, i++, &LdrEntry))
break;
}
return TRUE;
}
/*!\brief Displays GDT, LDT or IDT.
*/
static BOOLEAN
KdbpCmdGdtLdtIdt(
ULONG Argc,
PCHAR Argv[])
{
KDESCRIPTOR Reg;
ULONG SegDesc[2];
ULONG SegBase;
ULONG SegLimit;
PCHAR SegType;
USHORT SegSel;
UCHAR Type, Dpl;
INT i;
ULONG ul;
if (Argv[0][0] == 'i')
{
/* Read IDTR */
__sidt(&Reg.Limit);
if (Reg.Limit < 7)
{
KdbpPrint("Interrupt descriptor table is empty.\n");
return TRUE;
}
KdbpPrint("IDT Base: 0x%08x Limit: 0x%04x\n", Reg.Base, Reg.Limit);
KdbpPrint(" Idx Type Seg. Sel. Offset DPL\n");
for (i = 0; (i + sizeof(SegDesc) - 1) <= Reg.Limit; i += 8)
{
if (!NT_SUCCESS(KdbpSafeReadMemory(SegDesc, (PVOID)((ULONG_PTR)Reg.Base + i), sizeof(SegDesc))))
{
KdbpPrint("Couldn't access memory at 0x%p!\n", (PVOID)((ULONG_PTR)Reg.Base + i));
return TRUE;
}
Dpl = ((SegDesc[1] >> 13) & 3);
if ((SegDesc[1] & 0x1f00) == 0x0500) /* Task gate */
SegType = "TASKGATE";
else if ((SegDesc[1] & 0x1fe0) == 0x0e00) /* 32 bit Interrupt gate */
SegType = "INTGATE32";
else if ((SegDesc[1] & 0x1fe0) == 0x0600) /* 16 bit Interrupt gate */
SegType = "INTGATE16";
else if ((SegDesc[1] & 0x1fe0) == 0x0f00) /* 32 bit Trap gate */
SegType = "TRAPGATE32";
else if ((SegDesc[1] & 0x1fe0) == 0x0700) /* 16 bit Trap gate */
SegType = "TRAPGATE16";
else
SegType = "UNKNOWN";
if ((SegDesc[1] & (1 << 15)) == 0) /* not present */
{
KdbpPrint(" %03d %-10s [NP] [NP] %02d\n",
i / 8, SegType, Dpl);
}
else if ((SegDesc[1] & 0x1f00) == 0x0500) /* Task gate */
{
SegSel = SegDesc[0] >> 16;
KdbpPrint(" %03d %-10s 0x%04x %02d\n",
i / 8, SegType, SegSel, Dpl);
}
else
{
SegSel = SegDesc[0] >> 16;
SegBase = (SegDesc[1] & 0xffff0000) | (SegDesc[0] & 0x0000ffff);
KdbpPrint(" %03d %-10s 0x%04x 0x%08x %02d\n",
i / 8, SegType, SegSel, SegBase, Dpl);
}
}
}
else
{
ul = 0;
if (Argv[0][0] == 'g')
{
/* Read GDTR */
Ke386GetGlobalDescriptorTable(&Reg.Limit);
i = 8;
}
else
{
ASSERT(Argv[0][0] == 'l');
/* Read LDTR */
Ke386GetLocalDescriptorTable(&Reg.Limit);
Reg.Base = 0;
i = 0;
ul = 1 << 2;
}
if (Reg.Limit < 7)
{
KdbpPrint("%s descriptor table is empty.\n",
Argv[0][0] == 'g' ? "Global" : "Local");
return TRUE;
}
KdbpPrint("%cDT Base: 0x%08x Limit: 0x%04x\n",
Argv[0][0] == 'g' ? 'G' : 'L', Reg.Base, Reg.Limit);
KdbpPrint(" Idx Sel. Type Base Limit DPL Attribs\n");
for (; (i + sizeof(SegDesc) - 1) <= Reg.Limit; i += 8)
{
if (!NT_SUCCESS(KdbpSafeReadMemory(SegDesc, (PVOID)((ULONG_PTR)Reg.Base + i), sizeof(SegDesc))))
{
KdbpPrint("Couldn't access memory at 0x%p!\n", (ULONG_PTR)Reg.Base + i);
return TRUE;
}
Dpl = ((SegDesc[1] >> 13) & 3);
Type = ((SegDesc[1] >> 8) & 0xf);
SegBase = SegDesc[0] >> 16;
SegBase |= (SegDesc[1] & 0xff) << 16;
SegBase |= SegDesc[1] & 0xff000000;
SegLimit = SegDesc[0] & 0x0000ffff;
SegLimit |= (SegDesc[1] >> 16) & 0xf;
if ((SegDesc[1] & (1 << 23)) != 0)
{
SegLimit *= 4096;
SegLimit += 4095;
}
else
{
SegLimit++;
}
if ((SegDesc[1] & (1 << 12)) == 0) /* System segment */
{
switch (Type)
{
case 1: SegType = "TSS16(Avl)"; break;
case 2: SegType = "LDT"; break;
case 3: SegType = "TSS16(Busy)"; break;
case 4: SegType = "CALLGATE16"; break;
case 5: SegType = "TASKGATE"; break;
case 6: SegType = "INTGATE16"; break;
case 7: SegType = "TRAPGATE16"; break;
case 9: SegType = "TSS32(Avl)"; break;
case 11: SegType = "TSS32(Busy)"; break;
case 12: SegType = "CALLGATE32"; break;
case 14: SegType = "INTGATE32"; break;
case 15: SegType = "TRAPGATE32"; break;
default: SegType = "UNKNOWN"; break;
}
if (!(Type >= 1 && Type <= 3) &&
Type != 9 && Type != 11)
{
SegBase = 0;
SegLimit = 0;
}
}
else if ((SegDesc[1] & (1 << 11)) == 0) /* Data segment */
{
if ((SegDesc[1] & (1 << 22)) != 0)
SegType = "DATA32";
else
SegType = "DATA16";
}
else /* Code segment */
{
if ((SegDesc[1] & (1 << 22)) != 0)
SegType = "CODE32";
else
SegType = "CODE16";
}
if ((SegDesc[1] & (1 << 15)) == 0) /* Not present */
{
KdbpPrint(" %03d 0x%04x %-11s [NP] [NP] %02d NP\n",
i / 8, i | Dpl | ul, SegType, Dpl);
}
else
{
KdbpPrint(" %03d 0x%04x %-11s 0x%08x 0x%08x %02d ",
i / 8, i | Dpl | ul, SegType, SegBase, SegLimit, Dpl);
if ((SegDesc[1] & (1 << 12)) == 0) /* System segment */
{
/* FIXME: Display system segment */
}
else if ((SegDesc[1] & (1 << 11)) == 0) /* Data segment */
{
if ((SegDesc[1] & (1 << 10)) != 0) /* Expand-down */
KdbpPrint(" E");
KdbpPrint((SegDesc[1] & (1 << 9)) ? " R/W" : " R");
if ((SegDesc[1] & (1 << 8)) != 0)
KdbpPrint(" A");
}
else /* Code segment */
{
if ((SegDesc[1] & (1 << 10)) != 0) /* Conforming */
KdbpPrint(" C");
KdbpPrint((SegDesc[1] & (1 << 9)) ? " R/X" : " X");
if ((SegDesc[1] & (1 << 8)) != 0)
KdbpPrint(" A");
}
if ((SegDesc[1] & (1 << 20)) != 0)
KdbpPrint(" AVL");
KdbpPrint("\n");
}
}
}
return TRUE;
}
/*!\brief Displays the KPCR
*/
static BOOLEAN
KdbpCmdPcr(
ULONG Argc,
PCHAR Argv[])
{
PKIPCR Pcr = (PKIPCR)KeGetPcr();
KdbpPrint("Current PCR is at 0x%p.\n", Pcr);
#ifdef _M_IX86
KdbpPrint(" Tib.ExceptionList: 0x%08x\n"
" Tib.StackBase: 0x%08x\n"
" Tib.StackLimit: 0x%08x\n"
" Tib.SubSystemTib: 0x%08x\n"
" Tib.FiberData/Version: 0x%08x\n"
" Tib.ArbitraryUserPointer: 0x%08x\n"
" Tib.Self: 0x%08x\n"
" SelfPcr: 0x%08x\n"
" PCRCB: 0x%08x\n"
" Irql: 0x%02x\n"
" IRR: 0x%08x\n"
" IrrActive: 0x%08x\n"
" IDR: 0x%08x\n"
" KdVersionBlock: 0x%08x\n"
" IDT: 0x%08x\n"
" GDT: 0x%08x\n"
" TSS: 0x%08x\n"
" MajorVersion: 0x%04x\n"
" MinorVersion: 0x%04x\n"
" SetMember: 0x%08x\n"
" StallScaleFactor: 0x%08x\n"
" Number: 0x%02x\n"
" L2CacheAssociativity: 0x%02x\n"
" VdmAlert: 0x%08x\n"
" L2CacheSize: 0x%08x\n"
" InterruptMode: 0x%08x\n"
, Pcr->NtTib.ExceptionList, Pcr->NtTib.StackBase, Pcr->NtTib.StackLimit,
Pcr->NtTib.SubSystemTib, Pcr->NtTib.FiberData, Pcr->NtTib.ArbitraryUserPointer,
Pcr->NtTib.Self
, Pcr->SelfPcr
, Pcr->Prcb, Pcr->Irql
, Pcr->IRR, Pcr->IrrActive , Pcr->IDR
, Pcr->KdVersionBlock
, Pcr->IDT, Pcr->GDT, Pcr->TSS
, Pcr->MajorVersion, Pcr->MinorVersion
, Pcr->SetMember
, Pcr->StallScaleFactor
, Pcr->Number
, Pcr->SecondLevelCacheAssociativity
, Pcr->VdmAlert
, Pcr->SecondLevelCacheSize
, Pcr->InterruptMode);
#else
KdbpPrint(" GdtBase: 0x%p\n", Pcr->GdtBase);
KdbpPrint(" TssBase: 0x%p\n", Pcr->TssBase);
KdbpPrint(" UserRsp: 0x%p\n", (PVOID)Pcr->UserRsp);
KdbpPrint(" Self: 0x%p\n", Pcr->Self);
KdbpPrint(" CurrentPrcb: 0x%p\n", Pcr->CurrentPrcb);
KdbpPrint(" LockArray: 0x%p\n", Pcr->LockArray);
KdbpPrint(" Used_Self: 0x%p\n", Pcr->Used_Self);
KdbpPrint(" IdtBase: 0x%p\n", Pcr->IdtBase);
KdbpPrint(" Irql: %u\n", Pcr->Irql);
KdbpPrint(" SecondLevelCacheAssociativity: 0x%u\n", Pcr->SecondLevelCacheAssociativity);
KdbpPrint(" ObsoleteNumber: %u\n", Pcr->ObsoleteNumber);
KdbpPrint(" MajorVersion: 0x%x\n", Pcr->MajorVersion);
KdbpPrint(" MinorVersion: 0x%x\n", Pcr->MinorVersion);
KdbpPrint(" StallScaleFactor: 0x%lx\n", Pcr->StallScaleFactor);
KdbpPrint(" SecondLevelCacheSize: 0x%lx\n", Pcr->SecondLevelCacheSize);
KdbpPrint(" KdVersionBlock: 0x%p\n", Pcr->KdVersionBlock);
#endif
return TRUE;
}
#ifdef _M_IX86
/*!\brief Displays the TSS
*/
static BOOLEAN
KdbpCmdTss(
ULONG Argc,
PCHAR Argv[])
{
USHORT TssSelector;
PKTSS Tss = NULL;
if (Argc >= 2)
{
/*
* Specified TSS via its selector [selector] or descriptor address [*descaddr].
* Note that we ignore any other argument values.
*/
PCHAR Param, pszNext;
ULONG ulValue;
Param = Argv[1];
if (Argv[1][0] == '*')
++Param;
ulValue = strtoul(Param, &pszNext, 0);
if (pszNext && *pszNext)
{
KdbpPrint("Invalid TSS specification.\n");
return TRUE;
}
if (Argv[1][0] == '*')
{
/* Descriptor specified */
TssSelector = 0; // Unknown selector!
// TODO: Room for improvement: Find the TSS descriptor
// in the GDT so as to validate it.
Tss = (PKTSS)(ULONG_PTR)ulValue;
if (!Tss)
{
KdbpPrint("Invalid 32-bit TSS descriptor.\n");
return TRUE;
}
}
else
{
/* Selector specified, retrive the corresponding TSS */
TssSelector = (USHORT)ulValue;
Tss = KdbpRetrieveTss(TssSelector, NULL, NULL);
if (!Tss)
{
KdbpPrint("Invalid 32-bit TSS selector.\n");
return TRUE;
}
}
}
if (!Tss)
{
/* If no TSS was specified, use the current TSS descriptor */
TssSelector = Ke386GetTr();
Tss = KeGetPcr()->TSS;
// NOTE: If everything works OK, Tss is the current TSS corresponding to the TR selector.
}
KdbpPrint("%s TSS 0x%04x is at 0x%p.\n",
(Tss == KeGetPcr()->TSS) ? "Current" : "Specified", TssSelector, Tss);
KdbpPrint(" Backlink: 0x%04x\n"
" Ss0:Esp0: 0x%04x:0x%08x\n"
// NOTE: Ss1:Esp1 and Ss2:Esp2: are in the NotUsed1 field.
" CR3: 0x%08x\n"
" EFlags: 0x%08x\n"
" Eax: 0x%08x\n"
" Ebx: 0x%08x\n"
" Ecx: 0x%08x\n"
" Edx: 0x%08x\n"
" Esi: 0x%08x\n"
" Edi: 0x%08x\n"
" Eip: 0x%08x\n"
" Esp: 0x%08x\n"
" Ebp: 0x%08x\n"
" Cs: 0x%04x\n"
" Ss: 0x%04x\n"
" Ds: 0x%04x\n"
" Es: 0x%04x\n"
" Fs: 0x%04x\n"
" Gs: 0x%04x\n"
" LDT: 0x%04x\n"
" Flags: 0x%04x\n"
" IoMapBase: 0x%04x\n",
Tss->Backlink, Tss->Ss0, Tss->Esp0, Tss->CR3, Tss->EFlags,
Tss->Eax, Tss->Ebx, Tss->Ecx, Tss->Edx, Tss->Esi, Tss->Edi,
Tss->Eip, Tss->Esp, Tss->Ebp,
Tss->Cs, Tss->Ss, Tss->Ds, Tss->Es, Tss->Fs, Tss->Gs,
Tss->LDT, Tss->Flags, Tss->IoMapBase);
return TRUE;
}
#endif // _M_IX86
/*!\brief Bugchecks the system.
*/
static BOOLEAN
KdbpCmdBugCheck(
ULONG Argc,
PCHAR Argv[])
{
/* Set the flag and quit looping */
KdbpBugCheckRequested = TRUE;
return FALSE;
}
static BOOLEAN
KdbpCmdReboot(
ULONG Argc,
PCHAR Argv[])
{
/* Reboot immediately (we do not return) */
HalReturnToFirmware(HalRebootRoutine);
return FALSE;
}
/*!\brief Display debug messages on screen, with paging.
*
* Keys for per-page view: Home, End, PageUp, Arrow Up, PageDown,
* all others are as PageDown.
*/
static BOOLEAN
KdbpCmdDmesg(
ULONG Argc,
PCHAR Argv[])
{
ULONG beg, end;
KdbpIsInDmesgMode = TRUE; /* Toggle logging flag */
if (!KdpDmesgBuffer)
{
KdbpPrint("Dmesg: error, buffer is not allocated! /DEBUGPORT=SCREEN kernel param required for dmesg.\n");
return TRUE;
}
KdbpPrint("*** Dmesg *** TotalWritten=%lu, BufferSize=%lu, CurrentPosition=%lu\n",
KdbDmesgTotalWritten, KdpDmesgBufferSize, KdpDmesgCurrentPosition);
/* Pass data to the pager */
end = KdpDmesgCurrentPosition;
beg = (end + KdpDmesgFreeBytes) % KdpDmesgBufferSize;
/* No roll-overs, and overwritten=lost bytes */
if (KdbDmesgTotalWritten <= KdpDmesgBufferSize)
{
/* Show buffer (KdpDmesgBuffer + beg, num) */
KdbpPager(KdpDmesgBuffer, KdpDmesgCurrentPosition);
}
else
{
/* Show 2 buffers: (KdpDmesgBuffer + beg, KdpDmesgBufferSize - beg)
* and: (KdpDmesgBuffer, end) */
KdbpPager(KdpDmesgBuffer + beg, KdpDmesgBufferSize - beg);
KdbpPrint("*** Dmesg: buffer rollup ***\n");
KdbpPager(KdpDmesgBuffer, end);
}
KdbpPrint("*** Dmesg: end of output ***\n");
KdbpIsInDmesgMode = FALSE; /* Toggle logging flag */
return TRUE;
}
/*!\brief Sets or displays a config variables value.
*/
static BOOLEAN
KdbpCmdSet(
ULONG Argc,
PCHAR Argv[])
{
LONG l;
BOOLEAN First;
PCHAR pend = 0;
KDB_ENTER_CONDITION ConditionFirst = KdbDoNotEnter;
KDB_ENTER_CONDITION ConditionLast = KdbDoNotEnter;
static const PCHAR ExceptionNames[21] =
{
"ZERODEVIDE", "DEBUGTRAP", "NMI", "INT3", "OVERFLOW", "BOUND", "INVALIDOP",
"NOMATHCOP", "DOUBLEFAULT", "RESERVED(9)", "INVALIDTSS", "SEGMENTNOTPRESENT",
"STACKFAULT", "GPF", "PAGEFAULT", "RESERVED(15)", "MATHFAULT", "ALIGNMENTCHECK",
"MACHINECHECK", "SIMDFAULT", "OTHERS"
};
if (Argc == 1)
{
KdbpPrint("Available settings:\n");
KdbpPrint(" syntax [intel|at&t]\n");
KdbpPrint(" condition [exception|*] [first|last] [never|always|kmode|umode]\n");
KdbpPrint(" break_on_module_load [true|false]\n");
}
else if (strcmp(Argv[1], "syntax") == 0)
{
if (Argc == 2)
{
KdbpPrint("syntax = %s\n", KdbUseIntelSyntax ? "intel" : "at&t");
}
else if (Argc >= 3)
{
if (_stricmp(Argv[2], "intel") == 0)
KdbUseIntelSyntax = TRUE;
else if (_stricmp(Argv[2], "at&t") == 0)
KdbUseIntelSyntax = FALSE;
else
KdbpPrint("Unknown syntax '%s'.\n", Argv[2]);
}
}
else if (strcmp(Argv[1], "condition") == 0)
{
if (Argc == 2)
{
KdbpPrint("Conditions: (First) (Last)\n");
for (l = 0; l < RTL_NUMBER_OF(ExceptionNames) - 1; l++)
{
if (!ExceptionNames[l])
continue;
if (!KdbpGetEnterCondition(l, TRUE, &ConditionFirst))
ASSERT(FALSE);
if (!KdbpGetEnterCondition(l, FALSE, &ConditionLast))
ASSERT(FALSE);
KdbpPrint(" #%02d %-20s %-8s %-8s\n", l, ExceptionNames[l],
KDB_ENTER_CONDITION_TO_STRING(ConditionFirst),
KDB_ENTER_CONDITION_TO_STRING(ConditionLast));
}
ASSERT(l == (RTL_NUMBER_OF(ExceptionNames) - 1));
KdbpPrint(" %-20s %-8s %-8s\n", ExceptionNames[l],
KDB_ENTER_CONDITION_TO_STRING(ConditionFirst),
KDB_ENTER_CONDITION_TO_STRING(ConditionLast));
}
else
{
if (Argc >= 5 && strcmp(Argv[2], "*") == 0) /* Allow * only when setting condition */
{
l = -1;
}
else
{
l = strtoul(Argv[2], &pend, 0);
if (Argv[2] == pend)
{
for (l = 0; l < RTL_NUMBER_OF(ExceptionNames); l++)
{
if (!ExceptionNames[l])
continue;
if (_stricmp(ExceptionNames[l], Argv[2]) == 0)
break;
}
}
if (l >= RTL_NUMBER_OF(ExceptionNames))
{
KdbpPrint("Unknown exception '%s'.\n", Argv[2]);
return TRUE;
}
}
if (Argc > 4)
{
if (_stricmp(Argv[3], "first") == 0)
First = TRUE;
else if (_stricmp(Argv[3], "last") == 0)
First = FALSE;
else
{
KdbpPrint("set condition: second argument must be 'first' or 'last'\n");
return TRUE;
}
if (_stricmp(Argv[4], "never") == 0)
ConditionFirst = KdbDoNotEnter;
else if (_stricmp(Argv[4], "always") == 0)
ConditionFirst = KdbEnterAlways;
else if (_stricmp(Argv[4], "umode") == 0)
ConditionFirst = KdbEnterFromUmode;
else if (_stricmp(Argv[4], "kmode") == 0)
ConditionFirst = KdbEnterFromKmode;
else
{
KdbpPrint("set condition: third argument must be 'never', 'always', 'umode' or 'kmode'\n");
return TRUE;
}
if (!KdbpSetEnterCondition(l, First, ConditionFirst))
{
if (l >= 0)
KdbpPrint("Couldn't change condition for exception #%02d\n", l);
else
KdbpPrint("Couldn't change condition for all exceptions\n", l);
}
}
else /* Argc >= 3 */
{
if (!KdbpGetEnterCondition(l, TRUE, &ConditionFirst))
ASSERT(FALSE);
if (!KdbpGetEnterCondition(l, FALSE, &ConditionLast))
ASSERT(FALSE);
if (l < (RTL_NUMBER_OF(ExceptionNames) - 1))
{
KdbpPrint("Condition for exception #%02d (%s): FirstChance %s LastChance %s\n",
l, ExceptionNames[l],
KDB_ENTER_CONDITION_TO_STRING(ConditionFirst),
KDB_ENTER_CONDITION_TO_STRING(ConditionLast));
}
else
{
KdbpPrint("Condition for all other exceptions: FirstChance %s LastChance %s\n",
KDB_ENTER_CONDITION_TO_STRING(ConditionFirst),
KDB_ENTER_CONDITION_TO_STRING(ConditionLast));
}
}
}
}
else if (strcmp(Argv[1], "break_on_module_load") == 0)
{
if (Argc == 2)
KdbpPrint("break_on_module_load = %s\n", KdbBreakOnModuleLoad ? "enabled" : "disabled");
else if (Argc >= 3)
{
if (_stricmp(Argv[2], "enable") == 0 || _stricmp(Argv[2], "enabled") == 0 || _stricmp(Argv[2], "true") == 0)
KdbBreakOnModuleLoad = TRUE;
else if (_stricmp(Argv[2], "disable") == 0 || _stricmp(Argv[2], "disabled") == 0 || _stricmp(Argv[2], "false") == 0)
KdbBreakOnModuleLoad = FALSE;
else
KdbpPrint("Unknown setting '%s'.\n", Argv[2]);
}
}
else
{
KdbpPrint("Unknown setting '%s'.\n", Argv[1]);
}
return TRUE;
}
/*!\brief Displays help screen.
*/
static BOOLEAN
KdbpCmdHelp(
ULONG Argc,
PCHAR Argv[])
{
ULONG i;
KdbpPrint("Kernel debugger commands:\n");
for (i = 0; i < RTL_NUMBER_OF(KdbDebuggerCommands); i++)
{
if (!KdbDebuggerCommands[i].Syntax) /* Command group */
{
if (i > 0)
KdbpPrint("\n");
KdbpPrint("\x1b[7m* %s:\x1b[0m\n", KdbDebuggerCommands[i].Help);
continue;
}
KdbpPrint(" %-20s - %s\n",
KdbDebuggerCommands[i].Syntax,
KdbDebuggerCommands[i].Help);
}
return TRUE;
}
/*
* memrchr(), explicitly defined, since absent in the CRT.
* Reverse memchr()
* Find the last occurrence of 'c' in the buffer 's' of size 'n'.
*/
void *
memrchr(const void *s, int c, size_t n)
{
const unsigned char *cp;
if (n != 0)
{
cp = (unsigned char *)s + n;
do
{
if (*(--cp) == (unsigned char)c)
return (void *)cp;
} while (--n != 0);
}
return NULL;
}
/**
* @brief Calculate pointer position for N lines above the current position.
*
* Calculate pointer position for N lines above the current displaying
* position within the given buffer. Used by KdbpPager().
*
* @param[in] Buffer
* Character buffer to operate on.
*
* @param[in] BufLength
* Size of the buffer.
*
* @param[in] pCurPos
* Current position within the buffer.
*
* @return Beginning of the previous page of text.
*
* @note N lines count is hardcoded to the terminal's number of rows.
**/
static PCHAR
CountOnePageUp(
_In_ PCCH Buffer,
_In_ ULONG BufLength,
_In_ PCCH pCurPos,
_In_ const SIZE* TermSize)
{
PCCH p;
// p0 is initial guess of Page Start
ULONG p0len = TermSize->cx * TermSize->cy;
PCCH p0 = pCurPos - p0len;
PCCH prev_p = p0, p1;
ULONG j;
if (pCurPos < Buffer)
pCurPos = Buffer;
ASSERT(pCurPos <= Buffer + BufLength);
p = memrchr(p0, '\n', p0len);
if (!p)
p = p0;
for (j = TermSize->cy; j--; )
{
int linesCnt;
p1 = memrchr(p0, '\n', p-p0);
prev_p = p;
p = p1;
if (!p)
{
p = prev_p;
if (!p)
p = p0;
break;
}
linesCnt = (TermSize->cx+prev_p-p-2) / TermSize->cx;
if (linesCnt > 1)
j -= linesCnt-1;
}
ASSERT(p != NULL);
++p;
return (PCHAR)p;
}
static VOID
KdpFilterEscapes(
_Inout_ PSTR String)
{
PCHAR p;
SIZE_T i;
size_t len;
while ((p = strrchr(String, '\x1b'))) /* Look for escape character */
{
len = strlen(p);
if (p[1] == '[')
{
i = 2;
while (!isalpha(p[i++]));
memmove(p, p + i, len + 1 - i);
}
else
{
memmove(p, p + 1, len);
}
}
}
/*!\brief Prints the given string with, page by page.
*
* \param Buffer Characters buffer to print.
* \param BufferLen Buffer size.
*
* \note Doesn't correctly handle \\t and terminal escape sequences when calculating the
* number of lines required to print a single line from the Buffer in the terminal.
* Maximum length of buffer is limited only by memory size.
* Uses KdbPrintf internally.
*
* Note: BufLength should be greater than (KdTermSize.cx * KdTermSize.cy).
*/
static VOID
KdbpPagerInternal(
_In_ PCHAR Buffer,
_In_ ULONG BufLength,
_In_ BOOLEAN DoPage)
{
static BOOLEAN TerminalInitialized = FALSE;
CHAR c;
ULONG ScanCode;
PCHAR p;
SIZE_T i;
LONG RowsPrintedByTerminal;
if (BufLength == 0)
return;
/* Check if the user has aborted output of the current command */
if (KdbOutputAborted)
return;
/* Initialize the terminal */
if (!TerminalInitialized)
{
TerminalInitialized = TRUE;
KdpInitTerminal();
}
/* Refresh terminal size each time when number of printed rows is 0 */
if (KdbNumberOfRowsPrinted == 0)
{
KdpUpdateTerminalSize(&KdTermSize);
}
/* Loop through the strings */
p = Buffer;
while (p[0] != '\0')
{
if (DoPage)
{
if (p > Buffer + BufLength)
{
KdbPrintf("Dmesg: error, p > Buffer+BufLength,d=%d", p - (Buffer + BufLength));
return;
}
}
i = strcspn(p, "\n");
if (DoPage)
{
/* Are we out of buffer? */
if (p + i > Buffer + BufLength)
break; // Leaving pager function
}
/* Calculate the number of lines which will be printed in
* the terminal when outputting the current line. */
if (i > 0)
RowsPrintedByTerminal = (i + KdbNumberOfColsPrinted - 1) / KdTermSize.cx;
else
RowsPrintedByTerminal = 0;
if (p[i] == '\n')
RowsPrintedByTerminal++;
//KdbPrintf("!%d!%d!%d!%d!", KdbNumberOfRowsPrinted, KdbNumberOfColsPrinted, i, RowsPrintedByTerminal);
/* Display a prompt if we printed one screen full of text */
if (KdTermSize.cy > 0 &&
(LONG)(KdbNumberOfRowsPrinted + RowsPrintedByTerminal) >= KdTermSize.cy)
{
PCSTR Prompt;
/* Disable the repetition of previous command with long many-page output */
KdbRepeatLastCommand = FALSE;
if (KdbNumberOfColsPrinted > 0)
KdbPuts("\n");
if (DoPage)
Prompt = "--- Press q to abort, e/End,h/Home,u/PgUp, other key/PgDn ---";
else
Prompt = "--- Press q to abort, any other key to continue ---";
KdbPuts(Prompt);
c = KdpReadTermKey(&ScanCode);
if (DoPage) // Show pressed key
KdbPrintf(" '%c'/scan=%04x\n", c, ScanCode);
else
KdbPuts("\n");
RowsPrintedByTerminal++;
if (c == 'q')
{
KdbOutputAborted = TRUE;
return;
}
if (DoPage)
{
if (ScanCode == KEYSC_END || c == 'e')
{
PCHAR pBufEnd = Buffer + BufLength;
p = CountOnePageUp(Buffer, BufLength, pBufEnd, &KdTermSize);
i = strcspn(p, "\n");
}
else if (ScanCode == KEYSC_PAGEUP ||
ScanCode == KEYSC_ARROWUP || c == 'u')
{
p = CountOnePageUp(Buffer, BufLength, p, &KdTermSize);
i = strcspn(p, "\n");
}
else if (ScanCode == KEYSC_HOME || c == 'h')
{
p = Buffer;
i = strcspn(p, "\n");
}
}
KdbNumberOfRowsPrinted = 0;
KdbNumberOfColsPrinted = 0;
}
/* Insert a NUL after the line and print only the current line */
if (p[i] == '\n' && p[i + 1] != '\0')
{
c = p[i + 1];
p[i + 1] = '\0';
}
else
{
c = '\0';
}
/* Remove escape sequences from the line if there is no terminal connected */
// FIXME: Dangerous operation since we modify the source string!!
if (!KdTermConnected)
KdpFilterEscapes(p);
/* Print the current line */
KdbPuts(p);
/* Restore not null char with saved */
if (c != '\0')
p[i + 1] = c;
/* Set p to the start of the next line and
* remember the number of printed rows/cols */
p += i;
if (p[0] == '\n')
{
p++;
KdbNumberOfColsPrinted = 0;
}
else
{
ASSERT(p[0] == '\0');
KdbNumberOfColsPrinted += i;
}
KdbNumberOfRowsPrinted += RowsPrintedByTerminal;
}
}
/*!\brief Prints the given string with, page by page.
*
* \param Buffer Characters buffer to print.
* \param BufferLen Buffer size.
*
* \note Doesn't correctly handle \\t and terminal escape sequences when calculating the
* number of lines required to print a single line from the Buffer in the terminal.
* Maximum length of buffer is limited only by memory size.
* Uses KdbPrintf internally.
*
* Note: BufLength should be greater than (KdTermSize.cx * KdTermSize.cy).
*/
VOID
KdbpPager(
_In_ PCHAR Buffer,
_In_ ULONG BufLength)
{
/* Call the internal function */
KdbpPagerInternal(Buffer, BufLength, TRUE);
}
/*!\brief Prints the given string with printf-like formatting.
*
* \param Format Format of the string/arguments.
* \param ... Variable number of arguments matching the format specified in \a Format.
*
* \note Doesn't correctly handle \\t and terminal escape sequences when calculating the
* number of lines required to print a single line from the Buffer in the terminal.
* Prints maximum 4096 chars, because of its buffer size.
*/
VOID
KdbpPrint(
_In_ PSTR Format,
_In_ ...)
{
static CHAR Buffer[4096];
ULONG Length;
va_list ap;
/* Check if the user has aborted output of the current command */
if (KdbOutputAborted)
return;
/* Build the string */
va_start(ap, Format);
Length = _vsnprintf(Buffer, sizeof(Buffer) - 1, Format, ap);
Buffer[Length] = '\0';
va_end(ap);
/* Actually print it */
KdbpPagerInternal(Buffer, Length, FALSE);
}
VOID
KdbpPrintUnicodeString(
_In_ PCUNICODE_STRING String)
{
ULONG i;
if ((String == NULL) || (String->Buffer == NULL))
{
KdbpPrint("<NULL>");
return;
}
for (i = 0; i < String->Length / sizeof(WCHAR); i++)
{
KdbpPrint("%c", (CHAR)String->Buffer[i]);
}
}
BOOLEAN
NTAPI
KdbRegisterCliCallback(
PVOID Callback,
BOOLEAN Deregister)
{
ULONG i;
/* Loop all entries */
for (i = 0; i < _countof(KdbCliCallbacks); i++)
{
/* Check if deregistering was requested */
if (Deregister)
{
/* Check if this entry is the one that was registered */
if (KdbCliCallbacks[i] == Callback)
{
/* Delete it and report success */
KdbCliCallbacks[i] = NULL;
return TRUE;
}
}
else
{
/* Check if this entry is free */
if (KdbCliCallbacks[i] == NULL)
{
/* Set it and and report success */
KdbCliCallbacks[i] = Callback;
return TRUE;
}
}
}
/* Unsuccessful */
return FALSE;
}
/*! \brief Invokes registered CLI callbacks until one of them handled the
* Command.
*
* \param Command - Command line to parse and execute if possible.
* \param Argc - Number of arguments in Argv
* \param Argv - Array of strings, each of them containing one argument.
*
* \return TRUE, if the command was handled, FALSE if it was not handled.
*/
static
BOOLEAN
KdbpInvokeCliCallbacks(
IN PCHAR Command,
IN ULONG Argc,
IN PCHAR Argv[])
{
ULONG i;
/* Loop all entries */
for (i = 0; i < _countof(KdbCliCallbacks); i++)
{
/* Check if this entry is registered */
if (KdbCliCallbacks[i])
{
/* Invoke the callback and check if it handled the command */
if (KdbCliCallbacks[i](Command, Argc, Argv))
{
return TRUE;
}
}
}
/* None of the callbacks handled the command */
return FALSE;
}
/*!\brief Parses command line and executes command if found
*
* \param Command Command line to parse and execute if possible.
*
* \retval TRUE Don't continue execution.
* \retval FALSE Continue execution (leave KDB)
*/
static BOOLEAN
KdbpDoCommand(
IN PCHAR Command)
{
BOOLEAN Continue = TRUE;
SIZE_T i;
PCHAR p;
ULONG Argc;
// FIXME: for what do we need a 1024 characters command line and 256 tokens?
static PCHAR Argv[256];
static CHAR OrigCommand[1024];
RtlStringCbCopyA(OrigCommand, sizeof(OrigCommand), Command);
Argc = 0;
p = Command;
for (;;)
{
while (*p == '\t' || *p == ' ')
p++;
if (*p == '\0')
break;
i = strcspn(p, "\t ");
Argv[Argc++] = p;
p += i;
if (*p == '\0')
break;
*p = '\0';
p++;
}
if (Argc < 1)
return TRUE;
/* Reset the pager state: number of printed rows/cols and aborted output flag */
KdbNumberOfRowsPrinted = KdbNumberOfColsPrinted = 0;
KdbOutputAborted = FALSE;
for (i = 0; i < RTL_NUMBER_OF(KdbDebuggerCommands); i++)
{
if (!KdbDebuggerCommands[i].Name)
continue;
if (strcmp(KdbDebuggerCommands[i].Name, Argv[0]) == 0)
{
Continue = KdbDebuggerCommands[i].Fn(Argc, Argv);
goto Done;
}
}
/* Now invoke the registered callbacks */
if (KdbpInvokeCliCallbacks(Command, Argc, Argv))
goto Done;
KdbPrintf("Command '%s' is unknown.\n", OrigCommand);
Done:
KdbOutputAborted = FALSE;
return Continue;
}
/*!\brief KDB Main Loop.
*
* \param EnteredOnSingleStep TRUE if KDB was entered on single step.
*/
VOID
KdbpCliMainLoop(
IN BOOLEAN EnteredOnSingleStep)
{
BOOLEAN Continue = TRUE;
static CHAR Command[1024];
static CHAR LastCommand[1024] = "";
// FIXME HACK: SYSREG SUPPORT CORE-19807 -- Emit a backtrace.
// TODO: Remove once SYSREG "bt" command emission is fixed!
#if 1
KdbpDoCommand("bt");
#endif
if (EnteredOnSingleStep)
{
if (!KdbSymPrintAddress((PVOID)KeGetContextPc(KdbCurrentTrapFrame), KdbCurrentTrapFrame))
KdbPrintf("<%p>", KeGetContextPc(KdbCurrentTrapFrame));
KdbPuts(": ");
if (KdbpDisassemble(KeGetContextPc(KdbCurrentTrapFrame), KdbUseIntelSyntax) < 0)
KdbPuts("<INVALID>");
KdbPuts("\n");
}
else
{
/* Preceding this message is one of the "Entered debugger..." banners */
// KdbPuts("\nEntered debugger\n");
KdbPuts("\nType \"help\" for a list of commands.\n");
}
/* Main loop */
while (Continue)
{
/*
* Print the prompt and read a command.
* Repeat the last one if the user pressed Enter.
* This reduces the risk of RSI when single-stepping!
*/
// TEMP HACK! Issue an empty string instead of duplicating "kdb:>"
SIZE_T CmdLen = KdbPrompt(/*KdbPromptStr.Buffer*/"", Command, sizeof(Command));
if (CmdLen == 0)
{
/* Nothing received but the user didn't press Enter, retry */
continue;
}
else if (CmdLen > 1) // i.e. (*Command != ANSI_NULL)
{
/* Save this new last command */
KdbRepeatLastCommand = TRUE;
RtlStringCbCopyA(LastCommand, sizeof(LastCommand), Command);
/* Remember it */
KdbpCommandHistoryAppend(Command);
}
else if (KdbRepeatLastCommand)
{
/* The user directly pressed Enter */
RtlStringCbCopyA(Command, sizeof(Command), LastCommand);
}
/* Invoke the command */
Continue = KdbpDoCommand(Command);
}
}
/**
* @brief
* Interprets the KDBinit file from the \SystemRoot\System32\drivers\etc
* directory, that has been loaded by KdbpCliInit().
*
* This function is used to interpret the init file in the debugger context
* with a trap frame set up. KdbpCliInit() enters the debugger by calling
* DbgBreakPointWithStatus(DBG_STATUS_CONTROL_C). In turn, this will call
* KdbEnterDebuggerException() which will finally call this function if
* KdbInitFileBuffer is not NULL.
**/
VOID
KdbpCliInterpretInitFile(VOID)
{
PCHAR p1, p2;
p1 = InterlockedExchangePointer((PVOID*)&KdbInitFileBuffer, NULL);
if (!p1)
return;
/* Execute the commands in the init file */
KdbPuts("KDB: Executing KDBinit file...\n");
while (p1[0] != '\0')
{
size_t i = strcspn(p1, "\r\n");
if (i > 0)
{
CHAR c = p1[i];
p1[i] = '\0';
/* Look for "break" command and comments */
p2 = p1;
while (isspace(p2[0]))
p2++;
if (strncmp(p2, "break", sizeof("break")-1) == 0 &&
(p2[sizeof("break")-1] == '\0' || isspace(p2[sizeof("break")-1])))
{
/* Run the interactive debugger loop */
KdbpCliMainLoop(FALSE);
}
else if (p2[0] != '#' && p2[0] != '\0') /* Ignore empty lines and comments */
{
/* Invoke the command */
KdbpDoCommand(p1);
}
p1[i] = c;
}
p1 += i;
while (p1[0] == '\r' || p1[0] == '\n')
p1++;
}
KdbPuts("KDB: KDBinit executed\n");
}
/**
* @brief Called when KDB is initialized.
*
* Loads the KDBinit file from the \SystemRoot\System32\drivers\etc
* directory and interprets it, by calling back into the debugger.
**/
NTSTATUS
KdbpCliInit(VOID)
{
NTSTATUS Status;
OBJECT_ATTRIBUTES ObjectAttributes;
UNICODE_STRING FileName;
IO_STATUS_BLOCK Iosb;
FILE_STANDARD_INFORMATION FileStdInfo;
HANDLE hFile = NULL;
ULONG FileSize;
PCHAR FileBuffer;
/* Don't load the KDBinit file if its buffer is already lying around */
if (KdbInitFileBuffer)
return STATUS_SUCCESS;
/* Initialize the object attributes */
RtlInitUnicodeString(&FileName, L"\\SystemRoot\\System32\\drivers\\etc\\KDBinit");
InitializeObjectAttributes(&ObjectAttributes,
&FileName,
OBJ_CASE_INSENSITIVE | OBJ_KERNEL_HANDLE,
NULL,
NULL);
/* Open the file */
Status = ZwOpenFile(&hFile, FILE_READ_DATA | SYNCHRONIZE,
&ObjectAttributes, &Iosb, 0,
FILE_NON_DIRECTORY_FILE | FILE_SYNCHRONOUS_IO_NONALERT |
FILE_NO_INTERMEDIATE_BUFFERING);
if (!NT_SUCCESS(Status))
{
DPRINT("Could not open %wZ (Status 0x%lx)\n", &FileName, Status);
return Status;
}
/* Get the size of the file */
Status = ZwQueryInformationFile(hFile, &Iosb,
&FileStdInfo, sizeof(FileStdInfo),
FileStandardInformation);
if (!NT_SUCCESS(Status))
{
ZwClose(hFile);
DPRINT1("Could not query size of %wZ (Status 0x%lx)\n", &FileName, Status);
return Status;
}
FileSize = FileStdInfo.EndOfFile.u.LowPart;
/* Allocate memory for the file (add 1 byte for terminating NUL) */
FileBuffer = ExAllocatePool(NonPagedPool, FileSize + 1);
if (!FileBuffer)
{
ZwClose(hFile);
DPRINT1("Could not allocate %lu bytes for KDBinit file\n", FileSize);
return Status;
}
/* Load file into memory */
Status = ZwReadFile(hFile, NULL, NULL, NULL, &Iosb,
FileBuffer, FileSize, NULL, NULL);
ZwClose(hFile);
if (!NT_SUCCESS(Status) && (Status != STATUS_END_OF_FILE))
{
ExFreePool(FileBuffer);
DPRINT1("Could not read KDBinit file into memory (Status 0x%lx)\n", Status);
return Status;
}
FileSize = min(FileSize, (ULONG)Iosb.Information);
FileBuffer[FileSize] = ANSI_NULL;
/* Interpret the KDBinit file by calling back into the debugger */
InterlockedExchangePointer((PVOID*)&KdbInitFileBuffer, FileBuffer);
DbgBreakPointWithStatus(DBG_STATUS_CONTROL_C);
InterlockedExchangePointer((PVOID*)&KdbInitFileBuffer, NULL);
ExFreePool(FileBuffer);
return STATUS_SUCCESS;
}
/**
* @brief Debug logger function.
*
* This function writes text strings into KdpDmesgBuffer, using it as
* a circular buffer. KdpDmesgBuffer contents can be later (re)viewed
* using the dmesg command. KdbDebugPrint() protects KdpDmesgBuffer
* from simultaneous writes by use of KdpDmesgLogSpinLock.
**/
static VOID
NTAPI
KdbDebugPrint(
_In_ PCCH String,
_In_ ULONG Length)
{
KIRQL OldIrql;
ULONG beg, end, num;
/* Avoid recursive calling if we already are in Dmesg mode */
if (KdbpIsInDmesgMode)
return;
if (KdpDmesgBuffer == NULL)
return;
/* Acquire the printing spinlock without waiting at raised IRQL */
OldIrql = KdbpAcquireLock(&KdpDmesgLogSpinLock);
beg = KdpDmesgCurrentPosition;
/* Invariant: always_true(KdpDmesgFreeBytes == KdpDmesgBufferSize); */
num = min(Length, KdpDmesgFreeBytes);
if (num != 0)
{
end = (beg + num) % KdpDmesgBufferSize;
if (end > beg)
{
RtlCopyMemory(KdpDmesgBuffer + beg, String, Length);
}
else
{
RtlCopyMemory(KdpDmesgBuffer + beg, String, KdpDmesgBufferSize - beg);
RtlCopyMemory(KdpDmesgBuffer, String + (KdpDmesgBufferSize - beg), end);
}
KdpDmesgCurrentPosition = end;
/* Counting the total bytes written */
KdbDmesgTotalWritten += num;
}
/* Release the spinlock */
KdbpReleaseLock(&KdpDmesgLogSpinLock, OldIrql);
/* Optional step(?): find out a way to notify about buffer exhaustion,
* and possibly fall into kbd to use dmesg command: user will read
* debug strings before they will be wiped over by next writes. */
}
/**
* @brief Initializes the KDBG debugger.
*
* @param[in] DispatchTable
* Pointer to the KD dispatch table.
*
* @param[in] BootPhase
* Phase of initialization.
*
* @return A status value.
* @note Also known as "KdpKdbgInit".
**/
NTSTATUS
NTAPI
KdbInitialize(
_In_ PKD_DISPATCH_TABLE DispatchTable,
_In_ ULONG BootPhase)
{
/* Saves the different symbol-loading status across boot phases */
static ULONG LoadSymbols = 0;
if (BootPhase == 0)
{
/* Write out the functions that we support for now */
DispatchTable->KdpPrintRoutine = KdbDebugPrint;
/* Check if we have a command line */
if (KeLoaderBlock && KeLoaderBlock->LoadOptions)
{
/* Get the KDBG Settings */
KdbpGetCommandLineSettings(KeLoaderBlock->LoadOptions);
}
/* Register for BootPhase 1 initialization and as a Provider */
DispatchTable->KdpInitRoutine = KdbInitialize;
InsertTailList(&KdProviders, &DispatchTable->KdProvidersList);
}
else if (BootPhase == 1)
{
/* Register for later BootPhase 2 reinitialization */
DispatchTable->KdpInitRoutine = KdbInitialize;
/* Initialize Dmesg support */
/* Allocate a buffer for Dmesg log buffer. +1 for terminating null,
* see kdbp_cli.c:KdbpCmdDmesg()/2 */
KdpDmesgBuffer = ExAllocatePoolZero(NonPagedPool,
KdpDmesgBufferSize + 1,
TAG_KDBG);
/* Ignore failure if KdpDmesgBuffer is NULL */
KdpDmesgFreeBytes = KdpDmesgBufferSize;
KdbDmesgTotalWritten = 0;
/* Initialize spinlock */
KeInitializeSpinLock(&KdpDmesgLogSpinLock);
}
/* Initialize symbols support in BootPhase 0 and 1 */
if (BootPhase <= 1)
{
LoadSymbols <<= 1;
LoadSymbols |= KdbSymInit(BootPhase);
}
if (BootPhase == 1)
{
/* Announce ourselves */
CHAR buffer[60];
RtlStringCbPrintfA(buffer, sizeof(buffer),
" KDBG debugger enabled - %s\r\n",
!(LoadSymbols & 0x2) ? "No symbols loaded" :
!(LoadSymbols & 0x1) ? "Kernel symbols loaded"
: "Loading symbols");
HalDisplayString(buffer);
}
if (BootPhase >= 2)
{
/* I/O is now set up for disk access: load the KDBinit file */
NTSTATUS Status = KdbpCliInit();
/* Schedule an I/O reinitialization if needed */
if (Status == STATUS_OBJECT_NAME_NOT_FOUND ||
Status == STATUS_OBJECT_PATH_NOT_FOUND)
{
DispatchTable->KdpInitRoutine = KdbInitialize;
}
}
return STATUS_SUCCESS;
}
/* EOF */
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