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Annotation of researchv9/cmd/adb/vax/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: #include <sys/param.h>
        !             9: 
        !            10: struct reglist {
        !            11:        char    *rname;
        !            12:        short   roffs;
        !            13:        short   rsys;
        !            14:        TREG    rval;
        !            15: };
        !            16: 
        !            17: struct reglist reglist[] = {
        !            18:        {"p1lr", P1LR, 1},
        !            19:        {"p1br", P1BR, 1},
        !            20:        {"p0lr", P0LR, 1},
        !            21:        {"p0br", P0BR, 1},
        !            22:        {"ksp", KSP, 1},
        !            23:        {"esp", ESP, 1},
        !            24:        {"ssp", SSP, 1},
        !            25: #define        FW      7       /* first register we may write */
        !            26:        {"psl", PSL, 0},
        !            27:        {"pc",  PC, 0},
        !            28:        {"sp",  USP, 0},
        !            29:        {"fp",  FP, 0},
        !            30:        {"ap",  AP, 0},
        !            31:        {"r11", R11, 0},
        !            32:        {"r10", R10, 0},
        !            33:        {"r9",  R9, 0},
        !            34:        {"r8",  R8, 0},
        !            35:        {"r7",  R7, 0},
        !            36:        {"r6",  R6, 0},
        !            37:        {"r5",  R5, 0},
        !            38:        {"r4",  R4, 0},
        !            39:        {"r3",  R3, 0},
        !            40:        {"r2",  R2, 0},
        !            41:        {"r1",  R1, 0},
        !            42:        {"r0",  R0, 0},
        !            43:        {NULL}
        !            44: };
        !            45: 
        !            46: /*
        !            47:  * the following are needed only to
        !            48:  * make registers `addressable'
        !            49:  * which is needed only so we can
        !            50:  * examine register variables
        !            51:  */
        !            52: 
        !            53: ADDR raddr[MAXREG - MINREG + 1];
        !            54: int roffs[MAXREG - MINREG + 1] = {
        !            55:        R0, R1, R2, R3, R4, R5, R6, R7, R8, R9, R10, R11
        !            56: };
        !            57: 
        !            58: /*
        !            59:  * get/put registers
        !            60:  * in our saved copies
        !            61:  */
        !            62: 
        !            63: TREG
        !            64: rget(r)
        !            65: {
        !            66:        register struct reglist *rp;
        !            67: 
        !            68:        for (rp = reglist; rp->rname; rp++)
        !            69:                if (rp->roffs == r)
        !            70:                        return (rp->rval);
        !            71:        error("panic: rget");
        !            72:        /* NOTREACHED */
        !            73: }
        !            74: 
        !            75: rput(r, v)
        !            76: TREG v;
        !            77: {
        !            78:        register struct reglist *rp;
        !            79: 
        !            80:        for (rp = reglist; rp->rname; rp++)
        !            81:                if (rp->roffs == r) {
        !            82:                        rp->rval = v;
        !            83:                        return;
        !            84:                }
        !            85:        error("panic: rput");
        !            86:        /* NOTREACHED */
        !            87: }
        !            88: 
        !            89: /*
        !            90:  * grab registers into saved copy
        !            91:  * should be called before looking at the process
        !            92:  */
        !            93: 
        !            94: rsnarf()
        !            95: {
        !            96:        register struct reglist *rp;
        !            97: 
        !            98:        for (rp = reglist; rp->rname; rp++) {
        !            99:                rp->rval = 0;
        !           100:                fget((ADDR)rp->roffs, CORF|UBLKSP, (char *)&rp->rval, SZREG);
        !           101:        }
        !           102: }
        !           103: 
        !           104: /*
        !           105:  * put registers back
        !           106:  */
        !           107: 
        !           108: rrest()
        !           109: {
        !           110:        register struct reglist *rp;
        !           111: 
        !           112:        if (pid == 0)
        !           113:                return;
        !           114:        for (rp = &reglist[FW]; rp->rname; rp++)
        !           115:                fput((ADDR)rp->roffs, CORF|UBLKSP, (char *)&rp->rval, SZREG);
        !           116: }
        !           117: 
        !           118: /*
        !           119:  * print the registers
        !           120:  */
        !           121: 
        !           122: printregs(c)
        !           123: char c;
        !           124: {
        !           125:        register struct reglist *rp;
        !           126: 
        !           127:        for (rp = reglist; rp->rname; rp++) {
        !           128:                if (rp->rsys == 1 && c != 'R')
        !           129:                        continue;
        !           130:                printf("%-8R >%s\n", rtow(rp->rval), rp->rname);
        !           131:        }
        !           132:        printpc();
        !           133: }
        !           134: 
        !           135: /*
        !           136:  * translate a name to a magic register offset
        !           137:  * the latter useful in rget/rput
        !           138:  */
        !           139: 
        !           140: int
        !           141: rname(n)
        !           142: char *n;
        !           143: {
        !           144:        register struct reglist *rp;
        !           145: 
        !           146:        for (rp = reglist; rp->rname; rp++)
        !           147:                if (strcmp(n, rp->rname) == 0)
        !           148:                        return (rp->roffs);
        !           149:        return (BADREG);
        !           150: }

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