Hi Adrian,
Am 26.07.2020 um 06:54 schrieb John Paul Adrian Glaubitz:
What return code would we need to set on returning from an aborted syscall?
(Without setting a specific one, -ENOSYS will be used by default.)
If we're talking about syscall_trace_enter(), it should be -1.
OK, that's -EPERM. Reading the comment in asm/errno.h, -ENOSYS is not a
legitimate return code for syscalls to use. I'll change the trace entry
check to set -EPERM instead.
Andreas: could we preset -EPERM as return code on entering
do_trace_entry to save another jump, possibly even without setting
-ENOSYS before attempting the syscall, or would that break the syscall ABI?
Cheers,
Michael
Adrian
