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Annotation of 43BSDReno/sys/tahoe/sys_machdep.c, revision 1.1

1.1     ! root        1: /*
        !             2:  * Copyright (c) 1988 Regents of the University of California.
        !             3:  * All rights reserved.  The Berkeley software License Agreement
        !             4:  * specifies the terms and conditions for redistribution.
        !             5:  *
        !             6:  *     @(#)sys_machdep.c       7.5 (Berkeley) 6/28/90
        !             7:  */
        !             8: 
        !             9: #include "param.h"
        !            10: #include "systm.h"
        !            11: #include "user.h"
        !            12: #include "ioctl.h"
        !            13: #include "file.h"
        !            14: #include "proc.h"
        !            15: #include "kernel.h"
        !            16: #include "mtio.h"
        !            17: #include "buf.h"
        !            18: 
        !            19: #include "pte.h"
        !            20: 
        !            21: #ifdef TRACE
        !            22: int    nvualarm;
        !            23: 
        !            24: /* ARGSUSED */
        !            25: vtrace(p, uap, retval)
        !            26:        register struct proc *p;
        !            27:        register struct args {
        !            28:                int     request;
        !            29:                int     value;
        !            30:        } *uap;
        !            31:        int *retval;
        !            32: {
        !            33:        int vdoualarm();
        !            34: 
        !            35:        switch (uap->request) {
        !            36: 
        !            37:        case VTR_DISABLE:               /* disable a trace point */
        !            38:        case VTR_ENABLE:                /* enable a trace point */
        !            39:                if (uap->value < 0 || uap->value >= TR_NFLAGS)
        !            40:                        return (EINVAL);
        !            41:                *retval = traceflags[uap->value];
        !            42:                traceflags[uap->value] = uap->request;
        !            43:                break;
        !            44: 
        !            45:        case VTR_VALUE:         /* return a trace point setting */
        !            46:                if (uap->value < 0 || uap->value >= TR_NFLAGS)
        !            47:                        return (EINVAL);
        !            48:                *retval = traceflags[uap->value];
        !            49:                break;
        !            50: 
        !            51:        case VTR_UALARM:        /* set a real-time ualarm, less than 1 min */
        !            52:                if (uap->value <= 0 || uap->value > 60 * hz || nvualarm > 5)
        !            53:                        return (EINVAL);
        !            54:                nvualarm++;
        !            55:                timeout(vdoualarm, (caddr_t)p->p_pid, uap->value);
        !            56:                break;
        !            57: 
        !            58:        case VTR_STAMP:
        !            59:                trace(TR_STAMP, uap->value, p->p_pid);
        !            60:                break;
        !            61:        }
        !            62:        return (0);
        !            63: }
        !            64: 
        !            65: vdoualarm(arg)
        !            66:        int arg;
        !            67: {
        !            68:        register struct proc *p;
        !            69: 
        !            70:        p = pfind(arg);
        !            71:        if (p)
        !            72:                psignal(p, 16);
        !            73:        nvualarm--;
        !            74: }
        !            75: #endif

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