Hi, giving a look to interrupt 0x80 handling code (i386/i386/exception.s), I've met FAKE_MCOUNT/MEXITCOUNT system. FAKE_MCOUNT in the end calls _mcount (libkern/mcount.c) function which seems to be used for profiling purposes IMHO. It seems (reading comments in sys/gmon.h) that sysctl could be used to manage syscall profiling (kernel profiling?): Somebody can confirm that or I've misunderstood? I would like to know another thing too: why interrupt 0x80 handler is implemented through a trap gate? An interrupt gate could not be more logical?
thanks for answers, cheers rookie _______________________________________________ [EMAIL PROTECTED] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-hackers To unsubscribe, send any mail to "[EMAIL PROTECTED]"
