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588 lines
15 KiB
588 lines
15 KiB
/****************************** Module Header ******************************\
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* Module Name: stdexts.c
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*
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* Copyright (c) Microsoft Corporation. All rights reserved.
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*
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* This module contains standard routines for creating sane debuging extensions.
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* It is meant to be included after stdexts.h in one of the files comprising
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* the debug extsnsions for a given product or module.
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*
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* History:
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* 11-Apr-1995 Sanfords Created
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\***************************************************************************/
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HANDLE hCurrentProcess;
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HANDLE hCurrentThread;
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DWORD dwCurrentPc;
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WINDBG_EXTENSION_APIS *lpExtensionApis;
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#ifdef KERNEL
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DWORD dwProcessor;
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#endif // KERNEL
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PSTR pszAccessViolation = "%s: Access violation on \"%s\".\n";
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PSTR pszMoveException = "%s: exception in moveBlock()\n";
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PSTR pszReadFailure = "%s: lpReadProcessMemoryRoutine failed!\n";
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PSTR pszCantContinue = "%s: Non-continuable exception.\n";
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BOOL fCtrlCHit = FALSE;
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/*
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* This function returns TRUE once the user has hit a Ctrl-C.
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* This allows proper operation of nested SAFEWHILE loops so
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* that all levels exit.
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*
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* The globall fCtrlCHit flag needs to be reset manually and
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* is done so in the CommandEP function.
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*/
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BOOL IsCtrlCHit()
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{
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if ((lpExtensionApis->lpCheckControlCRoutine)()) {
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fCtrlCHit = TRUE;
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}
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return fCtrlCHit;
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}
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VOID moveBlock(
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PVOID pdst,
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PVOID src,
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DWORD size)
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{
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BOOL fSuccess = TRUE;
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ULONG Result;
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try {
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if (IsWinDbg()) {
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if (!ReadMem((DWORD_PTR)src, pdst, size, &Result)) {
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fSuccess = FALSE;
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}
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} else {
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if (!NT_SUCCESS(NtReadVirtualMemory(hCurrentProcess,
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src, pdst, size, NULL))) {
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fSuccess = FALSE;
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}
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}
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} except (EXCEPTION_EXECUTE_HANDLER) {
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Print(pszMoveException, pszExtName);
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fSuccess = FALSE;
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}
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if (!fSuccess) {
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DEBUGPRINT("%s: moveBlock(%p, %p, %x) failed.\n",
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pszExtName, pdst, src, size);
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OUTAHERE();
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}
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}
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BOOL tryMoveBlock(
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PVOID pdst,
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PVOID src,
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DWORD size)
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{
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BOOL fSuccess = TRUE;
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ULONG Result;
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try {
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if (IsWinDbg()) {
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if (!ReadMem((DWORD_PTR)src, pdst, size, &Result)) {
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DEBUGPRINT("%s: tryMoveBlock(%p, %p, %x) failed.\n", pszExtName, pdst, src, size);
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fSuccess = FALSE;
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}
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} else {
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if (!NT_SUCCESS(NtReadVirtualMemory(hCurrentProcess, src, pdst, size, NULL))) {
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DEBUGPRINT("%s: tryMoveBlock(%p, %p, %x) failed.\n", pszExtName, pdst, src, size);
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fSuccess = FALSE;
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}
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}
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} except (EXCEPTION_EXECUTE_HANDLER) {
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DEBUGPRINT("%s: tryMoveBlock(%p, %p, %x) faulted.\n", pszExtName, pdst, src, size);
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fSuccess = FALSE;
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}
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return(fSuccess);
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}
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VOID moveExp(
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PVOID pdst,
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LPSTR pszExp)
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{
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DWORD_PTR dwGlobal;
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BOOL fSuccess = TRUE;
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try {
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dwGlobal = (DWORD_PTR)EvalExp(pszExp);
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#ifndef KERNEL
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if (IsWinDbg()) {
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fSuccess = tryMoveBlock(&dwGlobal, (PVOID)dwGlobal, sizeof(DWORD));
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}
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#endif // !KERNEL
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*((PDWORD_PTR)pdst) = dwGlobal;
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} except (GetExceptionCode() == EXCEPTION_ACCESS_VIOLATION ?
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EXCEPTION_EXECUTE_HANDLER : EXCEPTION_CONTINUE_SEARCH) {
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Print(pszAccessViolation, pszExtName, pszExp);
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fSuccess = FALSE;
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}
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if (!fSuccess) {
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Print("%s: moveExp failed on %s.\n", pszExtName, pszExp);
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OUTAHERE();
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}
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}
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BOOL tryMoveExp(
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PVOID pdst,
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LPSTR pszExp)
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{
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DWORD_PTR dwGlobal;
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BOOL fSuccess = TRUE;
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try {
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dwGlobal = (DWORD_PTR)EvalExp(pszExp);
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#ifndef KERNEL
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if (IsWinDbg()) {
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if (!tryMove(dwGlobal, (PVOID)dwGlobal)) {
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DEBUGPRINT("%s: tryMoveExp(%p, %s) failed.\n", pszExtName, pdst, pszExp);
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fSuccess = FALSE;
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}
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}
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#endif // !KERNEL
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*((PDWORD_PTR)pdst) = dwGlobal;
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} except (GetExceptionCode() == EXCEPTION_ACCESS_VIOLATION ?
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EXCEPTION_EXECUTE_HANDLER : EXCEPTION_CONTINUE_SEARCH) {
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Print(pszAccessViolation, pszExtName, pszExp);
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DEBUGPRINT("%s: tryMoveExp(%p, %s) faulted.\n", pszExtName, pdst, pszExp);
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fSuccess = FALSE;
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}
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return(fSuccess);
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}
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VOID moveExpValue(
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PVOID pdst,
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LPSTR pszExp)
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{
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DWORD dw;
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DWORD_PTR addr;
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if (tryMoveExp(&addr, pszExp)) {
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if (tryMoveBlock(&dw, (PVOID)addr, sizeof(DWORD))) {
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*((PDWORD)pdst) = dw;
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return;
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}
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}
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Print("%s: moveExpValue failed on %s.\n", pszExtName, pszExp);
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OUTAHERE();
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}
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BOOL tryMoveExpValue(
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PVOID pdst,
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LPSTR pszExp)
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{
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DWORD dw;
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DWORD_PTR addr;
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if (tryMoveExp(&addr, pszExp)) {
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if (tryMove(dw, (PVOID)addr)) {
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*((PDWORD)pdst) = dw;
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return(TRUE);
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}
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}
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DEBUGPRINT("%s: tryMoveExpValue failed on %s.\n", pszExtName, pszExp);
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return(FALSE);
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}
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BOOL tryMoveExpPtr(
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PVOID pdst,
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LPSTR pszExp)
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{
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DWORD_PTR dwGlobal;
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BOOL fSuccess = TRUE;
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try {
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dwGlobal = (DWORD_PTR)EvalExp(pszExp);
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#ifndef KERNEL
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if (IsWinDbg()) {
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if (!tryMove(dwGlobal, (PVOID)dwGlobal)) {
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DEBUGPRINT("%s: tryMoveExpPtr(%p, %s) failed.\n", pszExtName, pdst, pszExp);
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fSuccess = FALSE;
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}
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}
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#endif // !KERNEL
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*((PDWORD_PTR)pdst) = dwGlobal;
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} except (GetExceptionCode() == EXCEPTION_ACCESS_VIOLATION ?
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EXCEPTION_EXECUTE_HANDLER : EXCEPTION_CONTINUE_SEARCH) {
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Print(pszAccessViolation, pszExtName, pszExp);
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DEBUGPRINT("%s: tryMoveExpPtr(%p, %s) faulted.\n", pszExtName, pdst, pszExp);
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fSuccess = FALSE;
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}
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return(fSuccess);
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}
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VOID moveExpValuePtr(
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PVOID pdst,
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LPSTR pszExp)
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{
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DWORD_PTR dw;
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if (tryMoveExpPtr(&dw, pszExp)) {
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if (tryMoveBlock(&dw, (PVOID)dw, sizeof(dw))) {
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*((PDWORD_PTR)pdst) = dw;
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return;
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}
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}
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Print("%s: moveExpValue failed on %s.\n", pszExtName, pszExp);
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OUTAHERE();
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}
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/***************************************************************************
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* Common command parsing stuff *
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***************************************************************************/
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PVOID EvalExp(
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LPSTR psz)
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{
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PVOID p;
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p = (PVOID)(lpExtensionApis->lpGetExpressionRoutine)(psz);
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if (p == NULL) {
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Print("%s: EvalExp failed to evaluate %s.\n", pszExtName, psz);
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}
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return p;
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}
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PVOID OptEvalExp(
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LPSTR psz)
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{
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while (*psz == ' ')
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psz++;
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if (*psz == '\0') {
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return(NULL);
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}
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return(EvalExp(psz));
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}
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PVOID OptEvalExp2(
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LPSTR *ppsz)
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{
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LPSTR psz = *ppsz;
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PVOID dwRet = NULL;
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while (*psz == ' ')
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psz++;
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if (*psz != '\0') {
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dwRet = EvalExp(psz);
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while (*psz != '\0' && *psz != ' ') {
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psz++;
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}
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}
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*ppsz = psz;
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return(dwRet);
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}
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DWORD StringToOpts(
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LPSTR psz)
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{
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DWORD opts = 0;
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while (*psz != '\0' && *psz != ' ') {
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if (*psz >= 'a' && *psz <= 'z') {
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opts |= 1 << (*psz - 'a');
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} else if (*psz >= 'A' && *psz <= 'Z') {
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opts |= 1 << (*psz - 'A');
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} else {
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return(OPTS_ERROR); // any non-letter option is an error.
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}
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psz++;
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}
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return(opts);
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}
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/*
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* Function to convert an option string to a DWORD of flags. pszLegalArgs
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* is used to allow option validation at the same time.
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*
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* *ppszArgs is set to point to after the options on exit.
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* On error, returns OPTS_ERROR.
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*/
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DWORD GetOpts(
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LPSTR *ppszArgs,
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LPSTR pszLegalArgs) // OPTIONAL
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{
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DWORD Opts = 0;
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LPSTR pszArgs = *ppszArgs;
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/*
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* Skip whitespace
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*/
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while (*pszArgs == ' ') {
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pszArgs++;
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}
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/*
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* process '-' prepended options.
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*/
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while (*pszArgs == '-') {
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pszArgs++;
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Opts = StringToOpts(pszArgs);
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/*
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* skip to whitespace or end.
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*/
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while (*pszArgs != '\0' && *pszArgs != ' ') {
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pszArgs++;
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}
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/*
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* skip trailing whitespace.
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*/
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while (*pszArgs == ' ') {
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pszArgs++;
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}
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*ppszArgs = pszArgs;
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/*
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* optionally validate against LegalArgs
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*/
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if (pszLegalArgs != NULL && ((Opts & StringToOpts(pszLegalArgs)) != Opts)) {
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Opts = OPTS_ERROR;
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Print("Bad options.\n");
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return(Opts);
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}
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}
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return(Opts);
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}
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VOID PrintHuge(
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LPSTR psz)
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{
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/*
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* Looks like this is faulting these days - Print seems to be fixed
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* so I'm leaving this entry point for compatibility. (SAS)
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*/
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#ifdef ITWORKS
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#define HUNK_SIZE 400
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int cch;
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CHAR chSave;
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/*
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* since dorky Print extension can't handle very long strings,
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* break it up into peices for it to chew.
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*/
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cch = strlen(psz);
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while (cch > HUNK_SIZE) {
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chSave = psz[HUNK_SIZE];
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psz[HUNK_SIZE] = '\0';
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Print(psz);
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psz[HUNK_SIZE] = chSave;
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psz += HUNK_SIZE;
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cch -= HUNK_SIZE;
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}
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#endif
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Print(psz);
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}
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/*
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* Dispatcher function used by generated entrypoint functions.
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*/
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VOID CommonEP(
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PVOID pFunction,
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LPSTR pszName,
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int type,
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LPSTR pszLegalOpts,
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HANDLE hcp,
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HANDLE hct,
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DWORD dwcp,
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#ifdef KERNEL
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DWORD dwp,
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#else // !KERNEL
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PWINDBG_EXTENSION_APIS lpea,
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#endif // !KERNEL
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LPSTR lpas)
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{
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BOOL dwOptions, fSuccess;
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PVOID param1, param2, param3;
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hCurrentProcess = hcp;
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hCurrentThread = hct;
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dwCurrentPc = dwcp;
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#ifdef KERNEL
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dwProcessor = dwp;
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lpExtensionApis = &ExtensionApis;
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#else // !KERNEL
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lpExtensionApis = lpea;
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#endif // !KERNLE
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#if 0
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DEBUGPRINT("CommonEP(%x, \"%s\", %d, \"%s\", %x, %x, %x, %x, \"%s\")\n",
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pFunction,
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pszName,
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type,
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pszLegalOpts,
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hcp,
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hct,
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dwcp,
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#ifdef KERNEL
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dwp,
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#else // !KERNLE
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lpea,
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#endif // !KERNEL
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lpas);
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#endif
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fCtrlCHit = FALSE; // reset this with each command. (SAFEWHILE fix)
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switch (type) {
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case NOARGS:
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fSuccess = ((TYPE_NOARGS)pFunction)();
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goto Exit;
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}
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dwOptions = GetOpts(&lpas, pszLegalOpts);
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if (dwOptions == OPTS_ERROR) {
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fSuccess = Ihelp(0, pszName);
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goto Exit;
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}
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try {
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switch (type) {
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case CUSTOM:
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fSuccess = ((TYPE_CUSTOM)pFunction)(dwOptions, lpas);
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break;
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case STDARGS0:
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fSuccess = ((TYPE_STDARGS0)pFunction)(dwOptions);
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break;
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case STDARGS1:
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fSuccess = ((TYPE_STDARGS1)pFunction)(dwOptions, OptEvalExp(lpas));
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break;
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case STDARGS2:
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param1 = OptEvalExp2(&lpas);
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fSuccess = ((TYPE_STDARGS2)pFunction)(dwOptions, param1, OptEvalExp(lpas));
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break;
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case STDARGS3:
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param1 = OptEvalExp2(&lpas);
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param2 = OptEvalExp2(&lpas);
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fSuccess = ((TYPE_STDARGS3)pFunction)(dwOptions, param1, param2, OptEvalExp(lpas));
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break;
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case STDARGS4:
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param1 = OptEvalExp2(&lpas);
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param2 = OptEvalExp2(&lpas);
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param3 = OptEvalExp2(&lpas);
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fSuccess = ((TYPE_STDARGS4)pFunction)(dwOptions, param1, param2, param3, OptEvalExp(lpas));
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break;
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default:
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Print("CommonEP: Don't recognize function type %d.\n", type);
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break;
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}
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} except (GetExceptionCode() == STATUS_NONCONTINUABLE_EXCEPTION ?
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EXCEPTION_EXECUTE_HANDLER : EXCEPTION_CONTINUE_SEARCH) {
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Print(pszCantContinue, pszExtName);
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}
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Exit:
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if (!fSuccess) {
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Print("%s failed.\n", pszName);
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Ihelp(0, pszName);
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}
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}
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/*
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* Entrypoint functions (generated from exts.h)
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*/
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#ifdef KERNEL
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#define DOIT(name, h1, h2, opts, type) \
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VOID name##( \
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HANDLE hcp, \
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HANDLE hct, \
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DWORD dwcp, \
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DWORD dwp, \
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LPSTR lpas) \
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{ \
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CommonEP(I##name, #name, type, opts, hcp, hct, dwcp, dwp, lpas); \
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}
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#else // !KERNEL
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#define DOIT(name, h1, h2, opts, type) \
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VOID name##( \
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HANDLE hcp, \
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HANDLE hct, \
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DWORD dwcp, \
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PWINDBG_EXTENSION_APIS lpea, \
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LPSTR lpas) \
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{ \
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CommonEP(I##name, #name, type, opts, hcp, hct, dwcp, lpea, lpas); \
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}
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#endif // !KERNEL
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#include "exts.h"
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#undef DOIT
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|
|
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/*
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* Standard help extension - present in all standard extensions.
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*/
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BOOL Ihelp(
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DWORD opts,
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LPSTR lpas)
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{
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#define DOIT(name, help1, help2, opts, type) { #name, help1, help2 },
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static struct {
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LPSTR pszCmdName;
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LPSTR pszHelp1;
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LPSTR pszHelp2;
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} he[] = {
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#include "exts.h"
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};
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#undef DOIT
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int i;
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while (*lpas == ' ')
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lpas++;
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if (*lpas == '\0') {
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Print("-------------- %s Debug Extension help:--------------\n\n", pszExtName);
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for (i = 0; i < sizeof(he) / sizeof(he[0]); i++) {
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if (IsCtrlCHit()) {
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break;
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}
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Print(he[i].pszHelp1);
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if (opts & OFLAG(v)) {
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PrintHuge(he[i].pszHelp2);
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}
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}
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return(TRUE);
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} else {
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|
for (i = 0; i < sizeof(he) / sizeof(he[0]); i++) {
|
|
if (IsCtrlCHit()) {
|
|
break;
|
|
}
|
|
if (strcmp(lpas, he[i].pszCmdName) == 0) {
|
|
Print(he[i].pszHelp1);
|
|
PrintHuge(he[i].pszHelp2);
|
|
return(TRUE);
|
|
}
|
|
}
|
|
Print("%s is not supported.\n", lpas);
|
|
}
|
|
|
|
return(FALSE);
|
|
}
|
|
|
|
|