我正在尝试在 NSIS 安装程序中加载并调用 C 库 DLL 的函数。当我尝试加载 DLL 时,发出错误 126 (ERROR_MOD_NOT_FOUND)。
这是我用来测试的最小安装程序脚本:
OutFile Main.exe
ShowInstDetails show
Section
SetOutPath "C:\Program Files (x86)\MyApp"
System::Call 'kernel32::LoadLibraryA(m "C:\Program Files (x86)\MyApp\API.dll")i.r0 ? e'
Pop $9
DetailPrint $9
DetailPrint $0
System::Call 'kernel32::GetProcAddress(i r0,m "GetVersion")i.r1 ? e'
Pop $9
DetailPrint $9
DetailPrint $1
System::Call 'kernel32::FreeLibrary(ir0)'
SectionEnd
您可以看到我将输出路径设置为 DLL 所在的位置;它的所有依赖项都在哪里。然而,在检查 procmon 中的进程时,我发现仅在 Windows 系统目录中搜索依赖项,而不是输出路径:
Load Image C:\Program Files (x86)\MyApp\API.dll SUCCESS
CreateFile C:\Program Files (x86)\MyApp\API.dll SUCCESS
QueryBasicInformationFiC:\Program Files (x86)\MyApp\API.dll SUCCESS
CloseFile C:\Program Files (x86)\MyApp\API.dll SUCCESS
CloseFile C:\Program Files (x86)\MyApp\API.dll SUCCESS
Thread Create SUCCESS
CreateFile C:\Windows\syswow64\DEPENDENCY_1.dll NAME NOT FOUND
CreateFile C:\Windows\syswow64\msvcr100.dll SUCCESS
QueryBasicInformationFiC:\Windows\syswow64\msvcr100.dll SUCCESS
CloseFile C:\Windows\syswow64\msvcr100.dll SUCCESS
CreateFile C:\Windows\syswow64\DEPENDENCY_2.dll NAME NOT FOUND
CreateFile C:\Windows\syswow64\DEPENDENCY_3.dll NAME NOT FOUND
CreateFile C:\Windows\syswow64\msvcr100.dll SUCCESS
如何让我的输出路径被搜索依赖项?需要注意的是,“C:\Program Files (x86)\MyApp”也在 Path 环境变量中,那么为什么也没有被搜索到呢?
NSIS 最近的安全更改锁定了允许您加载库的位置。您可以致电AddDllDirectory添加其他目录:
Section
System::Call 'KERNEL32::AddDllDirectory(w "c:\path")' ; Note: Path must exist at this point
System::Call 'KERNEL32::LoadLibrary(t "c:\path\file.dll")p.r0'
System::Call 'KERNEL32::GetProcAddress(pr0, m "somefunction")p.r1'
${If} $1 P<> 0
...
${EndIf}
System::Call 'KERNEL32::FreeLibrary(pr0)'
SectionEnd
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