XLaunchXBE cannot launch paths that start with "d:"

[abaire]

Calling XLaunchXBE with a path that starts with d: or D: fails to launch the XBE.
Passing an explicit expanded path (i.e., prefixing with \Device\CdRom0) works, as does passing a path with no drive prefix at all).

I'm guessing this is due to the table at https://github.com/XboxDev/nxdk/blob/master/lib/hal/fileio.c#L15 that expands the d: prefix to \??\D:\.

Example project to repro the issue at abaire/nxdk_launch_test

[JayFoxRox]

I'm guessing this is due to the table at https://github.com/XboxDev/nxdk/blob/master/lib/hal/fileio.c#L15 that expands the d: prefix to \??\D:\.

Yes; these are old OpenXDK functions (which suck). They have a lot of edge cases and hardcoded behaviour.

Those old functions should be rewritten for libnxdk in https://github.com/XboxDev/nxdk/tree/master/lib/nxdk (with proper mapping and mounting / unmounting handled by the kernel, as intended by MS).