{"id":659752,"date":"2013-08-22T22:47:12","date_gmt":"2013-08-22T14:47:12","guid":{"rendered":"http:\/\/www.sunjw.us\/blog\/?p=659752"},"modified":"2013-09-03T22:37:28","modified_gmt":"2013-09-03T14:37:28","slug":"windbg-debug-fhash","status":"publish","type":"post","link":"https:\/\/www.sunjw.us\/blog\/windbg-debug-fhash\/","title":{"rendered":"\u7528 WinDbg \u8c03\u8bd5\u7b26\u53f7\u4e0d\u5168\u7684\u7a0b\u5e8f"},"content":{"rendered":"

\u5176\u5b9e\u4e5f\u5c31\u662f\u8bb0\u5f55\u4e00\u4e0b\u7528 WinDbg \u8c03\u8bd5 fHash \u7684\u4e00\u6b21\u8fc7\u7a0b\uff0c\u8fd9\u4e2a bug \u662f\u7531\u4e8e\u6ca1\u597d\u597d\u770b\u6587\u6863\u9020\u6210\u7684\uff0c\u6211\u9700\u8981\u8ba9 fHash \u77e5\u9053\u5f53\u524d\u8fd0\u884c\u7684\u64cd\u4f5c\u7cfb\u7edf\u662f 32 \u4f4d\u8fd8\u662f 64 \u4f4d\u7684\uff0c\u4e4b\u540e\u597d\u53bb\u9009\u62e9\u6b63\u786e\u7684 shell extension \u6587\u4ef6\u3002\u67e5\u6587\u6863\u770b\u5230\u4e86\u8fd9\u4e2a\u51fd\u6570 IsWow64Process<\/a> \uff0c\u4e4b\u540e\u9519\u8bef\u7684\u4ee5\u4e3a kernel32 \u4e2d\u6709\u8fd9\u4e2a\u51fd\u6570\u5c31\u662f 64 \u4f4d\u64cd\u4f5c\u7cfb\u7edf\uff0c\u7ed3\u679c\u5c31\u5df2\u8fd9\u4e2a\u903b\u8f91\u5199\u4e0b\u4e86\u9519\u8bef\u7684 64 \u4f4d\u7cfb\u7edf\u5224\u65ad\u51fd\u6570\uff0c\u548c\u9519\u8bef\u6587\u4ef6\u8bfb\u53d6\u903b\u8f91\u3002<\/p>\n

\r\n\r\ntstring tstrExeDirPath(pszExeFullPath);\r\ntstring::size_type idx = tstrExeDirPath.rfind(_T("\\\\"));\r\ntstrExeDirPath = tstrExeDirPath.substr(0, idx);\r\n\r\ntstring tstrShlExtDll = tstrExeDirPath;\r\ntstrShlExtDll.append(_T("\\\\fHashShlExt"));\r\nif(IsWindows64())\r\n    tstrShlExtDll.append(_T("64"));\r\ntstrShlExtDll.append(_T(".dll"));\r\n\r\nWIN32_FIND_DATA ffData;\r\nHANDLE hFind = FindFirstFile(tstrShlExtDll.c_str(), &ffData);\r\n\r\nbool bRet = (hFind != INVALID_HANDLE_VALUE);\r\n\r\nif(bRet)\r\n{\r\n#if defined(UNICODE) || defined(_UNICODE)\r\n    wcscpy_s(pszShlDllPath, MAX_PATH, tstrShlExtDll.c_str());\r\n#else\r\n    strcpy_s(pszShlDllPath, MAX_PATH, tstrShlExtDll.c_str());\r\n#endif\r\n\r\n   FindClose(hFind);\r\n}\r\n\r\nreturn bRet;\r\n\r\n<\/pre>\n
\u7ed3\u679c\u5f88\u81ea\u7136\uff0c\u5728 32 \u4f4d\u7684 Windows XP \u4e0a\u6ca1\u6709\u6267\u884c\u6b63\u786e\u3002\u4f46\u662f\u6d4b\u8bd5\u73af\u5883\u6ca1\u6709 VisualStudio\uff0c\u800c\u4e14\u7528\u7684\u662f Release \u7f16\u8bd1\uff0c\u4e5f\u6ca1\u6709\u5e26\u7740\u7b26\u53f7\u6587\u4ef6\uff0c\u8fd9\u600e\u4e48\u8c03\u8bd5\u5462\u3002Windows XP \u4e0a\u88c5\u6709 WinDbg\uff0c\u90a3\u4e48\u5c31\u7528\u5b83\u6765\u8c03\u8bd5\u3002<\/p>\n
<\/p>\n
\u542f\u52a8 fHash \u548c WinDbg\uff0c\u9644\u52a0\u5230 fHash \u8fdb\u7a0b\uff0c\u7531\u4e8e\u6ca1\u6709 fHash \u7684\u7b26\u53f7\uff0c\u4e8e\u662f\u8003\u8651\u5728 FindFirstFile \u51fd\u6570\u4e0a\u4e0b\u65ad\u70b9\uff1a<\/p>\n
bp kernel32!FindFirstFileW<\/pre>\n
\"\"<\/a><\/p>\n
Go\uff0c\u5f00\u59cb\u8fd0\u884c\uff0c\u70b9\u51fb\u201c\u6dfb\u52a0\u53f3\u952e\u83dc\u5355\u201d\uff0cWinDbg \u505c\u5728 FindFirstFile \u65ad\u70b9\u4e0a\uff0c\u56de\u5230 Call Stack \u7684\u4e0a\u4e00\u5c42\uff1a<\/p>\n
.frame 01<\/pre>\n
\u770b\u5230 call \u4e4b\u524d\u7b2c\u4e8c\u6b21\u538b\u6808 push eax\uff0c\u68c0\u67e5 eax \u5bf9\u5e94\u5185\u5b58\u5730\u5740\u7684\u6570\u636e\uff1a<\/p>\n
\r\n\r\nr eax\r\ndb 003b7ed0\r\n\r\n<\/pre>\n
\"\"<\/a><\/p>\n
\u770b\u5230\u6307\u9488\u6307\u5411\u7684\u5b57\u7b26\u4e32\u662f …\/fHashShlExt64.dll\uff0c\u8bf4\u660e\u4e4b\u524d IsWindows64() \u8fd4\u56de\u7684 true\u3002\u4e5f\u5c31\u662f\u8bf4 kernel32 \u4e2d\u6709 IsWow64Process \u51fd\u6570\uff0c\u6211\u4eec\u6765\u770b\u4e00\u4e0b\u3002<\/p>\n
\u5728 GetProcAddress \u51fd\u6570\u4e0a\u4e0b\u65ad\u70b9\uff1a<\/p>\n
bp kernel32!GetProcAddress<\/pre>\n
\u518d\u6b21\u5c1d\u8bd5\u6dfb\u52a0\u53f3\u952e\u83dc\u5355\uff0cWinDbg \u505c\u5728 GetProcAddress \u65ad\u70b9\uff0c\u6211\u4eec\u8ba9\u5b83 Step Out\uff0c\u4e4b\u540e\u505c\u5728 IsWindows64() \u51fd\u6570\u91cc\u9762\uff0c\u770b\u770b\u8fd4\u56de\u503c eax\uff1a<\/p>\n
\r\n\r\nr eax\r\nu 7c81f2b9\r\n\r\n<\/pre>\n
\"\"<\/a><\/p>\n
\u53ef\u4ee5\u770b\u5230\u53cd\u7f16\u8bd1\u8be5\u5185\u5b58\u5730\u5740\u5c31\u662f IsWow64Process\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u5176\u5b9e\u4e5f\u5c31\u662f\u8bb0\u5f55\u4e00\u4e0b\u7528 WinDbg \u8c03\u8bd5 fHash \u7684\u4e00\u6b21\u8fc7\u7a0b\uff0c\u8fd9\u4e2a bug \u662f\u7531\u4e8e\u6ca1\u597d\u597d\u770b\u6587\u6863\u9020\u6210\u7684\uff0c\u6211\u9700 […]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[13],"tags":[370,359,360,358],"class_list":["post-659752","post","type-post","status-publish","format-standard","hentry","category-13","tag-fhash","tag-kernel32","tag-shell-extension","tag-windbg"],"_links":{"self":[{"href":"https:\/\/www.sunjw.us\/blog\/wp-json\/wp\/v2\/posts\/659752","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.sunjw.us\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.sunjw.us\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.sunjw.us\/blog\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.sunjw.us\/blog\/wp-json\/wp\/v2\/comments?post=659752"}],"version-history":[{"count":8,"href":"https:\/\/www.sunjw.us\/blog\/wp-json\/wp\/v2\/posts\/659752\/revisions"}],"predecessor-version":[{"id":659764,"href":"https:\/\/www.sunjw.us\/blog\/wp-json\/wp\/v2\/posts\/659752\/revisions\/659764"}],"wp:attachment":[{"href":"https:\/\/www.sunjw.us\/blog\/wp-json\/wp\/v2\/media?parent=659752"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.sunjw.us\/blog\/wp-json\/wp\/v2\/categories?post=659752"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.sunjw.us\/blog\/wp-json\/wp\/v2\/tags?post=659752"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}