NSKBL Subroutines

read_sector
call read_sector_direct.

sceKernelSysrootSetStatus
See SceSysmem.

sceDebugPrintKernelPanic
slightly different as non-secure SceSysmem -> sceDebugPrintKernelPanic

__vsnprintf_internal
same as non-secure SceSysmem.

vaddr_to_paddr_with_mode
same to sysmem 3.60 sub_81023308

sceKernelLoadModuleForPidInternal
don't have flags check

sceKernelStartModuleForPidInternal
don't have flags check