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Hello,

Im programming an Operating System and compile my Kernel binary with MSVC underVisual Studio 2019. Now i doesnt know how to call and load that C++ kernel binary.
My bootx64.efi is also compiled and works so far with simple_uefi. Im only found tutorials in c++with gcc and sysv_abi. and mingw-gcc...

Thanks so far...

Visual Studio uses PE file format for executable files, from your UEFI loader, write a function which loads the executable into a buffer, copy the entire buffer to a virtual address which will be your base address for Kernel, for my case I use x64 bit so my base address is 0xffffc00000000000, then from there extract the entry point of the pe file, then setup stack memory and call the entry point (base_address+entrypoint). Look at the PE file format article.

LipkeGu wrote:Im only found tutorials in c++with gcc and sysv_abi. and mingw-gcc...

Check out EDK2 tools and examples. That uses MS_ABI by default, as well as its examples. I don't know how good it is, but there's a PE loader example too.

Cheers,
bzt