Failed to find RtlCopyMemory procedure in ntdll.dll, only when GOARCH=386

  • 1 year ago
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The RtlCopyMemory function is part of the Windows API and is typically located in the ntdll.dll library. However, the error you're experiencing suggests that the function is not found when you set the GOARCH environment variable to 386 for compiling your Go program.

The reason for this issue is that the RtlCopyMemory function is not available in the 32-bit version of ntdll.dll. It is only available in the 64-bit version of the library.

To resolve this problem, you have a few options:

  1. Use the unsafe package in Go to directly access the memory and perform a similar copy operation.

  2. Modify your code to use an alternative method to copy memory, such as using the Copy function from the bytes package in Go.

  3. If you specifically require the RtlCopyMemory function, you may need to build your Go program for a 64-bit architecture (GOARCH=amd64) so that it can link with the appropriate 64-bit version of ntdll.dll.

It's worth noting that accessing low-level Windows APIs like RtlCopyMemory directly in Go is not recommended unless absolutely necessary. It's generally recommended to use higher-level abstractions provided by the standard library or external packages to perform memory operations.