Kernel32 Dll
Linda Berens
Has anyone debugged this "kernel32.lib" issue with Intel Parallel Studio XE 2018 and Visual Studio 2017? This showed up in past posts for earlier software versions, but the suggestions do not seem to apply directly to the new versions. We just installed the Visual Studio extensions to get SDK's. Please let me know how to verify that we have installed enough through Visual Studio and how to get the Intel Fortran compiler to recognize these libraries from the command shell.
kernel32.lib is THE fundamental Windows API library. It is found in the Windows SDK and the default set of library locations should include it. But I have sometimes seen that separate installations of the Windows SDK messes up the environment variables Visual Studio uses to locate these.
The first thing I would suggest is, in Visual Studio, go to Tools > Options > Intel Compilers and Tools > Visual Fortran > Compilers. Click the Reset... button, then switch to the x64 tab and click the Reset... button there. Go back to the Win32 tab, then click on the ... button to the right of Libraries. You should see a list that looks like this:
Thank you for the advice. My library list was nearly identical to yours. The fix to the problem seemed to be adding both the "um" library path and the "ucrt" library path. This allowed the linker to find all of the needed libraries.
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Calls made to kernel32.dll for string conversion between ASCII and Unicode and that forces application builder to include kernel32.dll into support folder. I seem to be unable to exclude kernel32.dll from being added. Next, application installer will pick up the kernel32.dll. If I try to delete it prior to creating installer, it will detect missing file and will not build. So, letting installer to copy kernel32.dll on a target PC seems strange, but works if both LabVIEW development PC and target PC have same Windows flavors and both 32-bit. The real trouble starts when 32-bit kernel32.dll is copied on 64-bit Windows 7. Then application will crash before it loads. The workaround, of course, is to manually delete 32-bit kernel32.dll that was placed there by installer.
Is there way to tweak application builder so that it will not automatically include a copy of kernel32.dll and let my application to use the one from Windows on target machine?
Is there other library I could use for Unicode in LabVIEW that is not married to kernel32.dll?
Make sure that any Call Library Node that accesses a kernel32.dll function, only contains the DLL name without any path information. The "Library Name or Path" being a name only tells the application builder to treat the DLL as system preinstalled and not copy it as a private DLL into the application build. This is actually also documented in the Online Help to the Call Library Node.
I have just come across the same problem when building a LabVIEW 2015 application that uses Unicode string display in captions. I have found that a LabVIEW subVI called "STR_ASCII-Unicode.vi" called by "Open Registry Key.vi" contains a call to the function MultiByteToWideChar in kernel32.dll, but uses the full absolute path to the DLL. Another function call in the same VI to "getACP" does not. Editing the function call in this VI and rebuilding the application no longer places a copy of kernel32.dll in the support folder.
I get no error message but also no functionality. The program I want to close stays happily open. Previously I called the same kernel32 function from TestStand where it worked as expected. But I need the funtionality in a VI, not in TS.
You can't just go and randomly kill processes in a multi user environment like Windows. The process handle must have been opened with above mentioned access right, but many access rights are restricted from normal users, so it may be also a question under which credentials the process runs in which you want to open the process handle. And no, a handle opened in one process (here TestStand) does not automatically give another process (LabVIEW) the same rights to use it. You should open the process handle explicitly in LabVIEW when you want to use it there.
TerminateProcess() is just as much an axe-murder as taskkill. Basically taskkill simply is a command line tool that eventually calls TerminateProcess() so nothing really gained by going the direct WinAPI route, except that calling one or two WinAPIs is several ms faster than creating the taskkill process.
I read through the CreateProcess description in MSDN and decided to stay with the old fashioned axe. CreateProcess has way to many parameters I don't really understand to find it enjoyable to play around with it just to learn the details.
As far as terminating a process from anywhere else than itself, I doubt that .Net has any advantage over any of the other approaches in terms of properly shutting down. .Net at least on non-Windows RT platforms does not reinvent the Windows kernel and its process model. This means that in order to to deal with processes, it has to use the same Win32 API interfaces that anyone else does, and that would mean to call ultimately TerminateProcess() too when you want get rid of a different process.
Well retrieving the window handle of a top level window through WinAPI isn't really difficult either and sending it a WM_QUIT through PostMessage() even easier. However that assumes that your external program is a GUI process and not a CLI and also that it properly implements the WM_QUIT functionality, although if it doesn't it is really broken.
Depending on the specific error, kernel32.dll error messages apply to any number of software programs on any of Microsoft's operating systems from Windows 95 through Windows 11, Windows 10, Windows 8, Windows 7, Windows Vista, and Windows XP.
We don't recommend this step unless you feel comfortable that the kernel32.dll error isn't caused by a single program (Step 2). If a single piece of software is causing the kernel32.dll error message, reinstalling Windows and then installing the same software may put you right back where you started.
Before we start dealing with the Shellcoding part, I would suggest having a strong hand in C to understand how memory works, coz everything we will be doing would be in-memory. Knowing the windows data-types like LPWSTR, LPSTR and others would be a boon since that will get you to understand that:
Next, the sole important things to know would be basic Assembly x86. ASM is by default the same either in Linux or Windows, except for the syscalls or API calls. So, knowing how registers work is primarily important.
In the above image, I have created two variables compName and compNameSize. These will be the arguments provided to the function GetComputerNameA. Remember that there are two similar functions GetComputerNameA and GetComputerNameW. The W stands for Wide Unicode characters, whereas A stands for ANSI CHAR strings. We will be using the ANSI throughout the blog series. So, below is what MSDN has to say about the GetComputerNameA function:
Remember when I said in the beginning that Kernel32.dll, NTDLL.DLL and Kernelbase.dll is loaded in every exe? Yes! The truth is that these DLLs are a pretty important part of the Operating system and these are loaded every time anything is executed. Thus, the loading order of these DLLs into memory is always going to be the same. This may however differ from OS to OS meaning it may be different in XP and may be different in Windows 10, but the loading order will stay the same across all Windows 10 versions.
Our main interest here is in PEB struct (known as LDR) since this is where all the information related to a process gets loaded. Everything from process arguments to process ID gets stored in here. Within PEB, there is a struct called as PEB_LDR_DATA which contains three important things. These are called Linked Lists.
Once you load an exe within windbg, it will show you some output. As for now we will ignore the output and type .cls in the command prompt below to clear the screen and start afresh. Now, type !peb within the command prompt and see what we get here:
Effectively, once our last instruction is run, it should load up the address of Kernel32.dll in the EAX register. and you can check the same in x32dbg as well as in windbg using the lm command: 74F50000 which is the address of Kernel32.dll.
Now that we have the address of kernel32.dll, the next step is to find the address of GetComputerNameA using LoadLibraryA and call the function. Unfortunately, this blog has grown too big and I will have to continue this in my next post. In the next post, we will be completing our full ASM code for fetching the computer name and printing it on screen and then the shellcode part.
I just updated the IDE to 2.2.0. Runs fine on my Windows 10 box, but Windows 7 gives me a "the procedure entry point getpackagefamilyname could not be located in the dynamic link library kernel32.dll".
You will now find that Arduino IDE periodically shows an "Update Available" dialog to offer you an update to the newer version of Arduino IDE. You must not accept these updates since the newer versions are not compatible with the vintage Windows versions.
The "Update Available" dialog contains a "SKIP VERSION" button. If you click that button, Arduino IDE will no longer show the dialog for the specific newer version being offered at the time you click the button.
The dialog will appear once again each time Arduino releases a new version of Arduino IDE, so you will need to click the button again after each release. That is slightly inconvenient, but the release cycle is fairly long so I don't think it will be very burdensome.
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