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Annotation of 43BSDReno/sys/tahoe/sys_machdep.c, revision 1.1.1.1

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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