/* lkrloc3.c */

/*
 *  Copyright (C) 1989-2010  Alan R. Baldwin
 *
 *  This program is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation, either version 3 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 *
 * Alan R. Baldwin
 * 721 Berkeley St.
 * Kent, Ohio  44240
 *
 *   With enhancements from:
 *
 *      John L. Hartman (JLH)
 *      jhartman@compuserve.com
 *
 *      Bill McKinnon (BM)
 *      w_mckinnon@conknet.com
 */

#include "aslink.h"

/*)Module       lkrloc3.c
 *
 *      The module lkrloc3.c contains the functions which
 *      perform the version 3 relocation calculations.
 *
 *      lkrloc3.c contains the following functions:
 *              a_uint  adb_lo()
 *              a_uint  adb_hi()
 *              VOID    erpdmp3()
 *              VOID    errdmp3()
 *              VOID    rele3()
 *              VOID    relerr3()
 *              VOID    relerp3()
 *              VOID    reloc3()
 *              VOID    relp3()
 *              VOID    relr3()
 *              VOID    relt3()
 *
 *      lkrloc3.c the local variable errmsg3[].
 *
 */

/*)Function VOID        reloc3(c)
 *
 *                      int c           process code
 *
 *      The function reloc3() calls a particular relocation
 *      function determined by the process code.
 *
 *      local variable:
 *              none
 *
 *      global variables:
 *              int lkerr                       error flag
 *
 *      called functions:
 *              int fprintf()           c_library
 *              VOID    rele3()         lkrloc3.c
 *              VOID    relp3()         lkrloc3.c
 *              VOID    relr3()         lkrloc3.c
 *              VOId    relt3()         lkrloc3.c
 *
 *      side effects:
 *              Refer to the called relocation functions.
 *
 */

VOID
reloc3(int c)
{
        switch(c) {

        case 'T':
                relt3();
                break;

        case 'R':
                relr3();
                break;

        case 'P':
                relp3();
                break;

        case 'E':
                rele3();
                break;

        default:
                fprintf(stderr, "Undefined Relocation Operation\n");
                lkerr++;
                break;

        }
}


/*)Function VOID        relt3()
 *
 *      The function relt3() evaluates a T line read by
 *      the linker. Each byte value read is saved in the
 *      rtval[] array, rtflg[] is set, and the number of
 *      evaluations is maintained in rtcnt.
 *
 *              T Line
 *
 *              T xx xx nn nn nn nn nn ...
 *
 *
 *              In: "T n0 n1 n2 n3 ... nn"
 *
 *              Out:     0       1        2    ..  rtcnt
 *                        +----+----+----+----+----+
 *              rtval | n0 | n1 | n2 | .. | nn |
 *                        +----+----+----+----+----+
 *              rtflag|  1 |  1 |  1 |  1 |  1 |
 *                        +----+----+----+----+----+
 *
 *      The T line contains the assembled code output by the assem-
 *      bler with xx xx being the offset address from the current area
 *      base address and nn being the assembled instructions and data in
 *      byte format.
 *
 *      local variable:
 *              none
 *
 *      global variables:
 *              int rtcnt               number of values evaluated
 *              int rtflg[]             array of evaluation flags
 *              int rtval[]             array of evaluation values
 *
 *      called functions:
 *              int eval()              lkeval.c
 *              int more()              lklex.c
 *
 *      side effects:
 *              Linker input T line evaluated.
 *
 */

VOID
relt3(void)
{
        rtcnt = 0;
        while (more()) {
                if (rtcnt < NTXT) {
                        rtval[rtcnt] = eval();
                        rtflg[rtcnt] = 1;
                        rterr[rtcnt] = 0;
                        rtcnt++;
                }
        }
}

/*)Function     VOID    relr3()
 *
 *      The function relr3() evaluates a R line read by
 *      the linker.  The R line data is combined with the
 *      previous T line data to perform the relocation of
 *      code and data bytes.  The S19 / IHX output and
 *      translation of the LST files to RST files may be
 *      performed.
 *
 *              R Line
 *
 *              R 0 0 nn nn n1 n2 xx xx ...
 *
 *      The R line provides the relocation information to the linker.
 *      The nn nn value is the current area index, i.e.  which area  the
 *      current  values  were  assembled.  Relocation information is en-
 *      coded in groups of 4 bytes:
 *
 *      1.  n1 is the relocation mode and object format
 *              1.  bit 0 word(0x00)/byte(0x01)
 *              2.  bit 1 relocatable area(0x00)/symbol(0x02)
 *              3.  bit 2 normal(0x00)/PC relative(0x04) relocation
 *              4.  bit 3 1-byte(0x00)/2-byte(0x08) byte data
 *              5.  bit 4 signed(0x00)/unsigned(0x10) byte data
 *              6.  bit 5 normal(0x00)/page '0'(0x20) reference
 *              7.  bit 6 normal(0x00)/page 'nnn'(0x40) reference
 *
 *      2.  n2  is  a byte index into the corresponding (i.e.  pre-
 *              ceeding) T line data (i.e.  a pointer to the data to be
 *              updated  by  the  relocation).   The T line data may be
 *              1-byte or  2-byte  byte  data  format  or  2-byte  word
 *              format.
 *
 *      3.  xx xx  is the area/symbol index for the area/symbol be-
 *              ing referenced.  the corresponding area/symbol is found
 *              in the header area/symbol lists.
 *
 *      The groups of 4 bytes are repeated for each item requiring relo-
 *      cation in the preceeding T line.
 *
 *      local variable:
 *              areax   **a             pointer to array of area pointers
 *              int     aindex          area index
 *              char    *errmsg3[]      array of pointers to error strings
 *              int     error           error code
 *              int     mode            relocation mode
 *              adrr_t  paga            paging base area address
 *              a_uint  pags            paging symbol address
 *              a_uint  r               PCR relocation value
 *              a_uint  reli            relocation initial value
 *              a_uint  relv            relocation final value
 *              int     rindex          symbol / area index
 *              a_uint  rtbase          base code address
 *              a_uint  rtofst          rtval[] index offset
 *              int rtp                 index into T data
 *              sym **s                 pointer to array of symbol pointers
 *
 *      global variables:
 *              head    *hp             pointer to the head structure
 *              int     lkerr           error flag
 *              a_uint  pc              relocated base address
 *              int     pcb             bytes per instruction word
 *              rerr    rerr            linker error structure
 *              FILE    *stderr         standard error device
 *
 *      called functions:
 *              a_uint  adb_1b()        lkrloc.c
 *              a_uint  adb_2b()        lkrloc.c
 *              a_uint  adb_lo()        lkrloc3.c
 *              a_uint  adb_hi()        lkrloc3.c
 * sdld specific
 *              VOID    elf()           lkelf.c
 *              VOID    gb()            lkgb.c
 * end sdld specific
 *              a_uint  evword()        lkrloc.c
 *              int     eval()          lkeval.c
 *              int     fprintf()       c_library
 *              VOID    ihx()           lkihx.c
 *              VOID    s19()           lks19.c
 *              VOID    lkulist         lklist.c
 *              int     more()          lklex.c
 *              VOID    relerr3()       lkrloc3.c
 *              int     symval()        lksym.c
 *
 *      side effects:
 *              The R and T lines are combined to produce
 *              relocated code and data.  Output Sxx / Ixx
 *              and relocated listing files may be produced.
 *
 */

VOID
relr3(void)
{
        int mode;
        a_uint reli, relv;
        int aindex, rindex, rtp, error, i;
        a_uint r, rtbase, rtofst, paga = 0, pags = 0;
        struct areax **a;
        struct sym **s;

        /*
         * Get area and symbol lists
         */
        a = hp->a_list;
        s = hp->s_list;

        /*
         * Verify Area Mode
         */
        if (eval() != (R3_WORD | R3_AREA) || eval()) {
                fprintf(stderr, "R input error\n");
                lkerr++;
                return;
        }

        /*
         * Get area pointer
         */
        aindex = (int) evword();
        if (aindex >= hp->h_narea) {
                fprintf(stderr, "R area error\n");
                lkerr++;
                return;
        }

        /*
         * Select Output File
         */
        if (oflag != 0) {
                ap = a[aindex]->a_bap;
                if (ofp != NULL) {
                        rtabnk->b_rtaflg = rtaflg;
                        if (ofp != ap->a_ofp) {
                                lkflush();
                        }
                }
                ofp = ap->a_ofp;
                rtabnk = ap->a_bp;
                rtaflg = rtabnk->b_rtaflg;
        }

        /*
         * Base values
         */
        rtbase = adb_xb(0, 0);
        rtofst = a_bytes;

        /*
         * Relocate address
         */
        pc = adb_xb(a[aindex]->a_addr, 0);

        /*
         * Number of 'bytes' per PC address
         */
        pcb = 1;

        #if 0
        printf("area %d base address: 0x%x size: 0x%x rtbase: 0x%x\n", aindex,
                a[aindex]->a_addr, a[aindex]->a_size, rtbase);
        #endif
        /*
         * Do remaining relocations
         */
        while (more()) {
                error = 0;
                mode = (int) eval();

                if ((mode & R_ESCAPE_MASK) == R_ESCAPE_MASK)
                {
                        mode = ((mode & ~R_ESCAPE_MASK) << 8) | eval();
                        /* printf("unescaping rmode\n"); */
                }

                rtp = (int) eval();
                rindex = (int) evword();

                /*
                 * R3_SYM or R3_AREA references
                 */
                if (mode & R3_SYM) {
                        if (rindex >= hp->h_nsym) {
                                fprintf(stderr, "R symbol error\n");
                                lkerr++;
                                return;
                        }
                        reli = symval(s[rindex]);
                }
/* sdld specific */
                else if ((IS_R_J11(mode) || IS_R_J19(mode)) && (rindex == 0xFFFF)) {
                        /* absolute acall/ajmp address */
                        reli = 0;
                }
/* end sdld specific */
                else {
                        if (rindex >= hp->h_narea) {
                                fprintf(stderr, "R area error\n");
                                lkerr++;
                                return;
                        }
                        reli = a[rindex]->a_addr;
                }

                /*
                 * R3_PCR addressing
                 */
                if (mode & R3_PCR) {
                        if (mode & R3_BYTE) {
                                reli -= (pc + (rtp-rtofst) + 1);
                        } else {
                                reli -= (pc + (rtp-rtofst) + 2);
                        }
                }

                /*
                 * R3_PAG0 or R3_PAG addressing
                 */
                if (mode & (R3_PAG0 | R3_PAG)) {
                        paga  = sdp.s_area->a_addr;
                        pags  = sdp.s_addr;
                        reli -= paga + pags;
                }

                /*
                 * R3_BYTE or R3_WORD operation
                 */
                if (mode & R3_BYTE) {
                        if (mode & R_BYT3)
                        {
                                /* This is a three byte address, of which
                                 * we will select one byte.
                                 */
/* sdld specific */
                                if (mode & R_BIT)
                                {
                                        relv = adb_24_bit(reli, rtp);
                                }
/* sdld specific */
                                else if (mode & R_HIB)
                                {
                                        /* printf("24 bit address selecting hi byte.\n"); */
                                        relv = adb_24_hi(reli, rtp);
                                }
                                else if (mode & R3_MSB)
                                {
                                        /* Note that in 24 bit mode, R3_MSB
                                         * is really the middle byte, not
                                         * the most significant byte.
                                         *
                                         * This is ugly and I can only apologize
                                         * for any confusion.
                                         */
                                        /* printf("24 bit address selecting middle byte.\n"); */
                                        relv = adb_24_mid(reli, rtp);
                                }
                                else
                                {
                                        /* printf("24 bit address selecting lo byte.\n"); */
                                        relv = adb_24_lo(reli, rtp);
                                }
                        }
                        else if (mode & R3_BYTX) {
                                /* This is a two byte address, of
                                 * which we will select one byte.
                                 */
                                if (mode & R_BIT) {
                                        relv = adb_bit(reli, rtp);
                                } else if (mode & R3_MSB) {
                                        relv = adb_hi(reli, rtp);
                                } else {
                                        relv = adb_lo(reli, rtp);
                                }
                        } else {
                                relv = adb_1b(reli, rtp);
                        }
                } else if (IS_R_J11(mode)) {
                        /*
                         * JLH: 11 bit jump destination for 8051.
                         * Forms two byte instruction with
                         * op-code bits in the MIDDLE!
                         * rtp points at 3 byte locus:
                         * first two will get the address,
                         * third one has raw op-code
                        */

                        /*
                         * Calculate absolute destination
                         * relv must be on same 2K page as pc
                        */
                        relv = adb_2b(reli, rtp);

                        if ((relv & ~((a_uint) 0x000007FF)) !=
                            ((pc + rtp - rtofst) & ~((a_uint) 0x000007FF))) {
                                        error = 6;
                        }

                        /*
                         * Merge MSB with op-code,
                         * ignoring top 5 bits of address.
                         * Then hide the op-code.
                        */
                        rtval[rtp] = ((rtval[rtp] & 0x07)<<5) | rtval[rtp+2];
                        rtflg[rtp + 2] = 0;
                        rtofst += 1;
                }
                else if (IS_R_J19(mode)) {
                        /*
                         * BK: 19 bit jump destination for DS80C390.
                         * Forms four byte instruction with
                         * op-code bits in the MIDDLE!
                         * rtp points at 4 byte locus:
                         * first three will get the address,
                         * fourth one has raw op-code
                         */
                        relv = adb_3b(reli, rtp);

                        /*
                         * Calculate absolute destination
                         *  relv must be on same 512K page as pc
                        */
                        if ((relv & ~((a_uint) 0x0007FFFF)) !=
                            ((pc + rtp - rtofst) & ~((a_uint) 0x0007FFFF))) {
                                error = 7;
                        }

                        /*
                         * Merge MSB with op-code,
                         * ignoring top 5 bits of address.
                         * Then hide the op-code.
                        */
                        rtval[rtp] = ((rtval[rtp] & 0x07)<<5) | rtval[rtp+3];
                        rtflg[rtp + 3] = 0;
                        rtofst += 1;
                }
                else if (IS_C24(mode))
                {
                        /*
                         * 24 bit destination
                         */
                        relv = adb_3b(reli, rtp);
                        }
                else
                {
                        /* 16 bit address. */
                        relv = adb_2b(reli, rtp);
                }

                /*
                 * R3_BYTE with R3_BYTX offset adjust
                 */
                if (mode & R3_BYTE) {
                        if (mode & R3_BYTX) {
                                rtofst += (a_bytes - 1);
                        }
                }

                /*
                 * Unsigned Byte Checking
                 */
                if (mode & R3_USGN && mode & R3_BYTE && relv & ~((a_uint) 0x000000FF))
                        error = 1;

                /*
                 * PCR Relocation Error Checking
                 */
                if (mode & R3_PCR && mode & R3_BYTE) {
                        r = relv & ~0x7F;
                        if (r != (a_uint) ~0x7F && r != 0)
                                error = 2;
                }

                /*
                 * Page Relocation Error Checking
                 */
                if ((TARGET_IS_GB || TARGET_IS_Z80) &&
                        mode & R3_PAG0 && (relv & ~0xFF || paga || pags))
                        error = 4;
                if (mode & R3_PAG  && (relv & ~0xFF))
                        error = 5;
/* sdld specific */
                if ((mode & R_BIT) && (relv & ~0x87FF))
                        error = 10;
/* end sdld specific */

                /*
                 * Error Processing
                 */
                if (error) {
                        rerr.aindex = aindex;
                        rerr.mode = mode;
                        rerr.rtbase = rtbase + rtp - rtofst - 1;
                        rerr.rindex = rindex;
                        rerr.rval = relv - reli;
                        relerr3(errmsg3[error]);

                        for (i=rtp; i<rtp+a_bytes; i++) {
                                if (rtflg[i]) {
                                        rterr[i] = error;
                                        break;
                                }
                        }
                }
        }
        if (uflag != 0) {
                lkulist(1);
        }
        if (oflag != 0) {
                lkout(1);
        }
}

char *errmsg3[] = {
/* 0 */ "LKRLOC3 Error List",
/* 1 */ "Unsigned Byte error",
/* 2 */ "Byte PCR relocation error",
/* 3 */ "",
/* 4 */ "Page0 relocation error",
/* 5 */ "Page Mode relocation error",
/* 6 */ "2K Page relocation error",
/* 7 */ "512K Page relocation error",
/* 8 */ "",
/* 9 */ "",
/* sdld specific */
/* 10 */        "Bit-addressable relocation error"
/* end sdld specific */
};


/*)Function VOID        relp3()
 *
 *      The function relp3() evaluates a P line read by
 *      the linker.  The P line data is combined with the
 *      previous T line data to set the base page address
 *      and test the paging boundary and length.
 *
 *              P Line
 *
 *              P 0 0 nn nn n1 n2 xx xx
 *
 *      The P line provides the paging information to the linker as
 *      specified by a .setdp directive.  The format of the relocation
 *      information is identical to that of the R line.  The correspond-
 *      ing T line has the following information:
 *              T xx xx aa aa bb bb
 *
 *      Where aa aa is the area reference number which specifies the
 *      selected page area and bb bb is the base address of the page.
 *      bb bb will require relocation processing if the 'n1 n2 xx xx' is
 *      specified in the P line.  The linker will verify that the base
 *      address is on a 256 byte boundary and that the page length of an
 *      area defined with the PAG type is not larger than 256 bytes.
 *
 *      local variable:
 *              areax   **a             pointer to array of area pointers
 *              int aindex              area index
 *              int mode                relocation mode
 *              a_uint  relv    relocation value
 *              int rindex              symbol / area index
 *              int rtp                 index into T data
 *              sym **s                 pointer to array of symbol pointers
 *
 *      global variables:
 *              head *hp                pointer to the head structure
 *              int lkerr               error flag
 *              sdp sdp                 base page structure
 *              FILE *stderr    standard error device
 *
 *      called functions:
 *              a_uint adb_2b() lkrloc.c
 *              a_uint evword() lkrloc.c
 *              int eval()              lkeval.c
 *              int fprintf()   c_library
 *              int more()              lklex.c
 *              int symval()    lksym.c
 *
 *      side effects:
 *              The P and T lines are combined to set
 *              the base page address and report any
 *              paging errors.
 *
 */

VOID
relp3()
{
        int aindex, rindex;
        int mode, rtp;
        a_uint relv;
        struct areax **a;
        struct sym **s;

        /*
         * Get area and symbol lists
         */
        a = hp->a_list;
        s = hp->s_list;

        /*
         * Verify Area Mode
         */
        if (eval() != (R3_WORD | R3_AREA) || eval()) {
                fprintf(stderr, "P input error\n");
                lkerr++;
        }

        /*
         * Get area pointer
         */
        aindex = (int) evword();
        if (aindex >= hp->h_narea) {
                fprintf(stderr, "P area error\n");
                lkerr++;
                return;
        }

        /*
         * Do remaining relocations
         */
        while (more()) {
                mode = (int) eval();
                rtp = (int) eval();
                rindex = (int) evword();

                /*
                 * R3_SYM or R3_AREA references
                 */
                if (mode & R3_SYM) {
                        if (rindex >= hp->h_nsym) {
                                fprintf(stderr, "P symbol error\n");
                                lkerr++;
                                return;
                        }
                        relv = symval(s[rindex]);
                } else {
                        if (rindex >= hp->h_narea) {
                                fprintf(stderr, "P area error\n");
                                lkerr++;
                                return;
                        }
                        relv = a[rindex]->a_addr;
                }
                adb_2b(relv, rtp);
        }

        /*
         * Paged values
         */
        aindex = (int) adb_2b(0, 2);
        if (aindex >= hp->h_narea) {
                fprintf(stderr, "P area error\n");
                lkerr++;
                return;
        }
        sdp.s_areax = a[aindex];
        sdp.s_area = sdp.s_areax->a_bap;
        sdp.s_addr = adb_2b(0, 4);
        if (sdp.s_area->a_addr & 0xFF || sdp.s_addr & 0xFF)
                relerp3("Page Definition Boundary Error");
}

/*)Function VOID        rele3()
 *
 *      The function rele3() closes all open output files
 *      at the end of the linking process.
 *
 *      local variable:
 *              none
 *
 *      global variables:
 *              int oflag               output type flag
 *              int uflag               relocation listing flag
 *
 *      called functions:
 *              VOID    lkfclose()      lkbank.c
 *              VOID    lkflush()       lkout.c
 *              VOID    lkulist()       lklist.c
 *
 *      side effects:
 *              All open output files are closed.
 *
 */

VOID
rele3()
{
        if (uflag != 0) {
                lkulist(0);
        }
        if (oflag != 0) {
                lkflush();
                lkfclose();
        }
}

/*)Function VOID        relerr3(str)
 *
 *              char    *str            error string
 *
 *      The function relerr3() outputs the error string to
 *      stderr and to the map file (if it is open).
 *
 *      local variable:
 *              none
 *
 *      global variables:
 *              FILE    *mfp            handle for the map file
 *
 *      called functions:
 *              VOID    errdmp3()       lkrloc3.c
 *
 *      side effects:
 *              Error message inserted into map file.
 *
 */

VOID
relerr3(char *str)
{
        errdmp3(stderr, str);
        if (mfp)
                errdmp3(mfp, str);
}

/*)Function VOID        errdmp3(fptr, str)
 *
 *              FILE    *fptr           output file handle
 *              char    *str            error string
 *
 *      The function errdmp3() outputs the error string str
 *      to the device specified by fptr.  Additional information
 *      is output about the definition and referencing of
 *      the symbol / area error.
 *
 *      local variable:
 *              int mode                error mode
 *              int aindex              area index
 *              int lkerr               error flag
 *              int rindex              error index
 *              sym **s         pointer to array of symbol pointers
 *              areax   **a             pointer to array of area pointers
 *              areax   *raxp           error area extension pointer
 *
 *      global variables:
 *              sdp sdp         base page structure
 *
 *      called functions:
 *              int fprintf()   c_library
 *              VOID    prntval()       lkrloc.c
 *
 *      side effects:
 *              Error reported.
 *
 */

const char errdmp3_null_srcname[] = "<missing>";

VOID
errdmp3(FILE *fptr, char *str)
{
        int mode, aindex, rindex;
        struct sym **s;
        struct areax **a;
        struct areax *raxp;

        a = hp->a_list;
        s = hp->s_list;

        mode = rerr.mode;
        aindex = rerr.aindex;
        rindex = rerr.rindex;

        /*
         * Print Error
         */
        fprintf(fptr, "\n?ASlink-Warning-%s", str);
        lkerr++;

        /*
         * Print symbol if symbol based
         */
        if (mode & R3_SYM) {
                fprintf(fptr, " for symbol  %s\n",
                        &s[rindex]->s_id[0]);
        } else {
                fprintf(fptr, "\n");
        }

        /*
         * Print Ref Info
         */
/*         11111111112222222222333333333344444444445555555555666666666677777*/
/*12345678901234567890123456789012345678901234567890123456789012345678901234*/
/*        |                 |                 |                 |           */
        fprintf(fptr,
"         file              module            area              offset\n");
        fprintf(fptr,
"  Refby  %-14.14s    %-14.14s    %-14.14s    ",
                        (hp->h_lfile && hp->h_lfile->f_idp) ? hp->h_lfile->f_idp : errdmp3_null_srcname,
                        &hp->m_id[0],
                        &a[aindex]->a_bap->a_id[0]);
        prntval(fptr, rerr.rtbase);

        /*
         * Print Def Info
         */
        if (mode & R3_SYM) {
                raxp = s[rindex]->s_axp;
        } else {
                raxp = a[rindex];
        }
/*         11111111112222222222333333333344444444445555555555666666666677777*/
/*12345678901234567890123456789012345678901234567890123456789012345678901234*/
/*        |                 |                 |                 |           */
        fprintf(fptr,
"  Defin  %-14.14s    %-14.14s    %-14.14s    ",
                        (raxp->a_bhp->h_lfile && raxp->a_bhp->h_lfile->f_idp) ? raxp->a_bhp->h_lfile->f_idp : errdmp3_null_srcname,
                        &raxp->a_bhp->m_id[0],
                        &raxp->a_bap->a_id[0]);
        if (mode & R3_SYM) {
                prntval(fptr, s[rindex]->s_addr);
        } else {
                prntval(fptr, rerr.rval);
        }
}

/*)Function VOID        relerp3(str)
 *
 *              char    *str            error string
 *
 *      The function relerp3() outputs the paging error string to
 *      stderr and to the map file (if it is open).
 *
 *      local variable:
 *              none
 *
 *      global variables:
 *              FILE    *mfp            handle for the map file
 *
 *      called functions:
 *              VOID    erpdmp3()       lkrloc3.c
 *
 *      side effects:
 *              Error message inserted into map file.
 *
 */

VOID
relerp3(char *str)
{
        erpdmp3(stderr, str);
        if (mfp)
                erpdmp3(mfp, str);
}

/*)Function VOID        erpdmp3(fptr, str)
 *
 *              FILE    *fptr           output file handle
 *              char    *str            error string
 *
 *      The function erpdmp3() outputs the error string str
 *      to the device specified by fptr.
 *
 *      local variable:
 *              head    *thp            pointer to head structure
 *
 *      global variables:
 *              int             lkerr           error flag
 *              sdp             sdp                     base page structure
 *
 *      called functions:
 *              int fprintf()           c_library
 *              VOID    prntval()       lkrloc.c
 *
 *      side effects:
 *              Error reported.
 *
 */

VOID
erpdmp3(FILE *fptr, char *str)
{
        struct head *thp;

        thp = sdp.s_areax->a_bhp;

        /*
         * Print Error
         */
        fprintf(fptr, "\n?ASlink-Warning-%s\n", str);
        lkerr++;

        /*
         * Print PgDef Info
         */
/*         111111111122222222223333333333444444444455555555556666666666777*/
/*123456789012345678901234567890123456789012345678901234567890123456789012*/
        fprintf(fptr,
"         file              module            pgarea            pgoffset\n");
        fprintf(fptr,
"  PgDef  %-14.14s    %-14.14s    %-14.14s    ",
                        thp->h_lfile->f_idp,
                        &thp->m_id[0],
                        &sdp.s_area->a_id[0]);
        prntval(fptr, sdp.s_area->a_addr + sdp.s_addr);
}

/* sdld specific */
/*)Function a_uint              adb_bit(v, i)
 *
 *              a_uint v        value to add to byte
 *              int i           rtval[] index
 *
 *      The function adb_bit() converts the single
 *      byte address value contained in rtval[i] to bit-
 *      addressable space and adds the value of v to it.
 *      The new value of rtval[i] is returned.
 *
 *      local variable:
 *              a_uint  j               temporary evaluation variable
 *
 *      global variables:
 *              none
 *
 *      called functions:
 *              none
 *
 *      side effects:
 *              The value of rtval[] is changed.
 *
 */

a_uint
adb_bit(a_uint v, int i)
{
        a_uint j;

        j = adb_lo(v, i) & 0xFF;
        if ((j >= 0x20) && (j <= 0x2F)) {
                j = (j - 0x20) * 8;
        } else if ((j < 0x80) || ((j & 0x07) != 0)) {
                return(0x100);//error
        }

        if (hilo) {
                j = rtval[i+1] = j + (rtval[i] & 0x07);
        } else {
                j = rtval[i] = j + (rtval[i+1] & 0x07);
        }
        return(j);
}
/* end sdld specific */

/*)Function     a_uint  adb_lo(v, i)
 *
 *              int     v               value to add to byte
 *              int     i               rtval[] index
 *
 *      The function adb_lo() adds the value of v to the
 *      value contained in rtval[i] through rtval[i + a_bytes - 1].
 *      The new value of rtval[i] ... is returned.
 *      The rtflg[] flags are cleared for all rtval[i] ... except
 *      the LSB.
 *
 *      local variable:
 *              a_uint  j               temporary evaluation variable
 *
 *      global variables:
 *              hilo                    byte ordering parameter
 *
 *      called functions:
 *              none
 *
 *      side effects:
 *              The value of rtval[] is changed.
 *              The rtflg[] values corresponding to all bytes
 *              except the LSB of the value are cleared to reflect
 *              the fact that the LSB is the selected byte.
 *
 */

a_uint
adb_lo(v, i)
a_uint  v;
int     i;
{
        a_uint j;
        int m, n;

        j = adb_xb(v, i);
        /*
         * LSB is lowest order byte of data
         */
        m = (hilo ? a_bytes-1 : 0);
        for (n=0; n<a_bytes; n++) {
                if(n != m) rtflg[i+n] = 0;
        }
        return (j);
}

/*)Function     a_uint  adb_hi(v, i)
 *
 *              int     v               value to add to byte
 *              int     i               rtval[] index
 *
 *      The function adb_hi() adds the value of v to the
 *      value contained in rtval[i] through rtval[i + a_bytes - 1].
 *      The new value of rtval[i] .... is returned.
 *      The LSB rtflg[] is cleared.
 *
 *      local variable:
 *              a_uint  j               temporary evaluation variable
 *
 *      global variables:
 *              hilo                    byte ordering parameter
 *
 *      called functions:
 *              none
 *
 *      side effects:
 *              The value of rtval[] is changed.
 *              The rtflg[] values corresponding to all bytes
 *              except the 2nd byte (MSB) are cleared to reflect
 *              the fact that the MSB is the selected byte.
 *
 */

a_uint
adb_hi(v, i)
a_uint  v;
int     i;
{
        a_uint j;
        int m, n;

        j = adb_xb(v, i);
        /*
         * MSB is next lowest order byte of data
         */
        m = (hilo ? a_bytes-2 : 1);
        for (n=0; n<a_bytes; n++) {
                if(n != m) rtflg[i+n] = 0;
        }
        return (j);
}

/* sdld specific */
/*)Function a_uint              adb_24_bit(v, i)
 *
 *              a_uint v        value to add to byte
 *              int i           rtval[] index
 *
 *      The function adb_24_bit() converts the single
 *      byte address value contained in rtval[i] to bit-
 *      addressable space and adds the value of v to it.
 *      The new value of rtval[i] is returned.
 *
 *      local variable:
 *              a_uint  j               temporary evaluation variable
 *
 *      global variables:
 *              none
 *
 *      called functions:
 *              none
 *
 *      side effects:
 *              The value of rtval[] is changed.
 *
 */

a_uint
adb_24_bit(v, i)
a_uint v;
int i;
{
        a_uint j;

        j = adb_24_lo(v, i) & 0xFF;
        if ((j >= 0x20) && (j <= 0x2F)) {
                j = (j - 0x20) * 8;
        } else if ((j < 0x80) || ((j & 0x07) != 0)) {
                return(0x100);//error
        }

        if (hilo) {
                j = rtval[i+2] = j + (rtval[i+1] & 0x07);
        } else {
                j = rtval[i] = j + (rtval[i+1] & 0x07);
        }
        return(j);
}

/*)Function a_uint              adb_24_hi(v, i)
 *
 *              a_uint v        value to add to byte
 *              int i           rtval[] index
 *
 *      The function adb_24_hi() adds the value of v to the
 *      24 bit value contained in rtval[i] - rtval[i+2].
 *      The new value of rtval[i] / rtval[i+1] is returned.
 *      The LSB & middle byte rtflg[] is cleared.
 *
 *      local variable:
 *              a_uint  j               temporary evaluation variable
 *
 *      global variables:
 *              hilo                    byte ordering parameter
 *
 *      called functions:
 *              none
 *
 *      side effects:
 *              The value of rtval[] is changed.
 *              The rtflg[] value corresponding to the
 *              LSB & middle byte of the word value is cleared to
 *              reflect the fact that the MSB is the selected byte.
 *
 */

a_uint
adb_24_hi(v, i)
a_uint v;
int i;
{
        a_uint j;

        j = adb_3b(v, i);

        /* Remove the lower two bytes. */
        if (hilo)
        {
                rtflg[i+2] = 0;
        }
        else
        {
                rtflg[i] = 0;
        }
        rtflg[i+1] = 0;

        return (j);
}

/*)Function a_uint              adb_24_mid(v, i)
 *
 *              a_uint v        value to add to byte
 *              int i           rtval[] index
 *
 *      The function adb_24_mid() adds the value of v to the
 *      24 bit value contained in rtval[i] - rtval[i+2].
 *      The new value of rtval[i] / rtval[i+1] is returned.
 *      The LSB & MSB byte rtflg[] is cleared.
 *
 *      local variable:
 *              a_uint  j               temporary evaluation variable
 *
 *      global variables:
 *              hilo                    byte ordering parameter
 *
 *      called functions:
 *              none
 *
 *      side effects:
 *              The value of rtval[] is changed.
 *              The rtflg[] value corresponding to the
 *              LSB & MSB of the 24 bit value is cleared to reflect
 *              the fact that the middle byte is the selected byte.
 *
 */

a_uint
adb_24_mid(v, i)
a_uint v;
int i;
{
        a_uint j;

        j = adb_3b(v, i);

        /* remove the MSB & LSB. */
        rtflg[i+2] = 0;
        rtflg[i] = 0;

        return (j);
}

/*)Function a_uint              adb_24_lo(v, i)
 *
 *              a_uint v        value to add to byte
 *              int i           rtval[] index
 *
 *      The function adb_24_lo() adds the value of v to the
 *      24 bit value contained in rtval[i] - rtval[i+2].
 *      The new value of rtval[i] / rtval[i+1] is returned.
 *      The MSB & middle byte rtflg[] is cleared.
 *
 *      local variable:
 *              a_uint  j               temporary evaluation variable
 *
 *      global variables:
 *              hilo                    byte ordering parameter
 *
 *      called functions:
 *              none
 *
 *      side effects:
 *              The value of rtval[] is changed.
 *              The rtflg[] value corresponding to the
 *              MSB & middle byte  of the word value is cleared to
 *              reflect the fact that the LSB is the selected byte.
 *
 */

a_uint
adb_24_lo(v, i)
a_uint v;
int i;
{
        a_uint j;

        j = adb_3b(v, i);

        /* Remove the upper two bytes. */
        if (hilo)
        {
                rtflg[i] = 0;
        }
        else
        {
                rtflg[i+2] = 0;
        }
        rtflg[i+1] = 0;

        return (j);
}

/* end sdld specific */
