usr/src/sys/vax/include/kdbparam.h

/*
 *      @(#)kdbparam.h  7.2 (Berkeley) %G%
 */

#define DBNAME "kdb\n"
#define LPRMODE "%R"
#define OFFMODE "+%R"

#define KDB_IPL         0xf     /* highest priority software interrupt */
#define setsoftkdb()    mtpr(SIRR, KDB_IPL)

#define MAXINT  0x7fffffff
#define MAXSTOR (KERNBASE - ctob(UPAGES))

#define ENTRYMASK       1                       /* check for entry masks */
#define ishiddenreg(p)  ((p) <= &reglist[8])

#define BPT     03
#define TBIT    020

#define clrsstep()      (pcb.pcb_psl &= ~TBIT)
#define setsstep()      (pcb.pcb_psl |= TBIT)

#define SETBP(ins)      (BPT | ((ins) & ~0xff))

#define getprevpc(fp)   get((fp)+16, DSP)       /* pc of caller */
#define getprevframe(fp) (get((fp)+12, DSP)&~2) /* fp of caller */
#define getnargs(fp)    (get((fp)+6, DSP)&0xffff)
#define nextarg(ap)     ((ap) + 4)              /* next argument in list */
#define NOFRAME         0                       /* fp at top of call stack */

#define issignalpc(pc)  (MAXSTOR < (pc) && (pc) < MAXSTOR+ctob(UPAGES))
#define getsignalpc(fp) get((fp)+92, DSP)       /* pc of caller before signal */

/* long to ints and back (puns) */
union {
        int     I[2];
        long    L;
} itolws;

#define leng(a)         itol(0,a)
#define shorten(a)      ((short)(a))
#define itol(a,b)       (itolws.I[0]=(b), itolws.I[1]=(a), itolws.L)
#define byte(a)         ((a) & 0xff)
#define btol(a)         ((a))

/* check for address wrap around */
#define addrwrap(oaddr,newaddr) (((oaddr)^(newaddr)) >> 24)
/*
 * INSTACK tells whether its argument is a stack address.
 * INUDOT tells whether its argument is in the (extended) u. area.
 * These are used for consistency checking and dont have to be exact.
 *
 * INKERNEL tells whether its argument is a kernel space address.
 * KVTOPH trims a kernel virtal address back to its offset
 * in the kernel address space.
 */
#define INSTACK(x)      (((x)&0xf0000000) == 0x70000000)
#define INUDOT(x)       (((x)&0xf0000000) == 0x70000000)
#define INKERNEL(x)     (((x)&0xf0000000) == 0x80000000)

#define KVTOPH(x)       ((x)&~ 0x80000000)
#define KERNOFF         0x80000000