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Annotation of researchv10no/cmd/adb/11v/regs.c, revision 1.1

1.1     ! root        1: /*
        !             2:  * code to keep track of registers
        !             3:  */
        !             4: 
        !             5: #include "defs.h"
        !             6: #include "regs.h"
        !             7: #include "space.h"
        !             8: 
        !             9: struct reglist {
        !            10:        char    *rname;
        !            11:        short   roffs;
        !            12:        short   rsys;
        !            13:        TREG    rval;
        !            14: };
        !            15: 
        !            16: struct reglist reglist[] = {
        !            17:        {"ps",  PS, 0},
        !            18:        {"pc",  PC, 0},
        !            19:        {"sp",  SP, 0},
        !            20:        {"r5",  R5, 0},
        !            21:        {"r4",  R4, 0},
        !            22:        {"r3",  R3, 0},
        !            23:        {"r2",  R2, 0},
        !            24:        {"r1",  R1, 0},
        !            25:        {"r0",  R0, 0},
        !            26:        {NULL}
        !            27: };
        !            28: 
        !            29: /*
        !            30:  * the following are needed only to
        !            31:  * make registers `addressable'
        !            32:  * which is needed only so we can
        !            33:  * examine register variables
        !            34:  */
        !            35: 
        !            36: ADDR raddr[MAXREG - MINREG + 1];
        !            37: int roffs[MAXREG - MINREG + 1] = {
        !            38: #if NOTDEF
        !            39:        R0, R1, R2, R3, R4, R5
        !            40: #else
        !            41:        0
        !            42: #endif
        !            43: };
        !            44: 
        !            45: /*
        !            46:  * get/put registers
        !            47:  * in our saved copies
        !            48:  */
        !            49: 
        !            50: TREG
        !            51: rget(r)
        !            52: {
        !            53:        register struct reglist *rp;
        !            54: 
        !            55:        for (rp = reglist; rp->rname; rp++)
        !            56:                if (rp->roffs == r)
        !            57:                        return (rp->rval);
        !            58:        error("panic: rget");
        !            59:        /* NOTREACHED */
        !            60: }
        !            61: 
        !            62: rput(r, v)
        !            63: TREG v;
        !            64: {
        !            65:        register struct reglist *rp;
        !            66: 
        !            67:        for (rp = reglist; rp->rname; rp++)
        !            68:                if (rp->roffs == r) {
        !            69:                        rp->rval = v;
        !            70:                        return;
        !            71:                }
        !            72:        error("panic: rput");
        !            73:        /* NOTREACHED */
        !            74: }
        !            75: 
        !            76: /*
        !            77:  * grab registers into saved copy
        !            78:  * should be called before looking at the process
        !            79:  */
        !            80: 
        !            81: rsnarf()
        !            82: {
        !            83:        register struct reglist *rp;
        !            84: 
        !            85:        for (rp = reglist; rp->rname; rp++) {
        !            86:                rp->rval = 0;
        !            87:                fget((ADDR)rp->roffs, CORF|UBLKSP, (char *)&rp->rval, SZREG);
        !            88:        }
        !            89: }
        !            90: 
        !            91: /*
        !            92:  * put registers back
        !            93:  */
        !            94: 
        !            95: rrest()
        !            96: {
        !            97:        register struct reglist *rp;
        !            98: 
        !            99:        if (pid == 0)
        !           100:                return;
        !           101:        for (rp = &reglist[0]; rp->rname; rp++)
        !           102:                fput((ADDR)rp->roffs, CORF|UBLKSP, (char *)&rp->rval, SZREG);
        !           103: }
        !           104: 
        !           105: /*
        !           106:  * print the registers
        !           107:  */
        !           108: 
        !           109: printregs(c)
        !           110: char c;
        !           111: {
        !           112:        register struct reglist *rp;
        !           113: 
        !           114:        for (rp = reglist; rp->rname; rp++) {
        !           115:                if (rp->rsys == 1 && c != 'R')
        !           116:                        continue;
        !           117:                printf("%-8R >%s\n", rtow(rp->rval), rp->rname);
        !           118:        }
        !           119:        printpc();
        !           120: }
        !           121: 
        !           122: /*
        !           123:  * translate a name to a magic register offset
        !           124:  * the latter useful in rget/rput
        !           125:  */
        !           126: 
        !           127: int
        !           128: rname(n)
        !           129: char *n;
        !           130: {
        !           131:        register struct reglist *rp;
        !           132: 
        !           133:        for (rp = reglist; rp->rname; rp++)
        !           134:                if (strcmp(n, rp->rname) == 0)
        !           135:                        return (rp->roffs);
        !           136:        return (BADREG);
        !           137: }

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