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1.1 ! root 1: # ! 2: # Operating System Interface to Berkeley VAX/UNIX ! 3: # for ! 4: # Macro SPITBOL V3.5 ! 5: # ----------------------------------------------- ! 6: # ! 7: # Copyright 1982 ! 8: # Dewar Information Systems Corporation ! 9: # 221 West Lake Street ! 10: # Oak Park, Illinois 60302 ! 11: # ! 12: # this operating system interface, commonly referred to as osint, ! 13: # provides the Macro SPITBOL compiler with a means to do all i/o ! 14: # and other OS dependent activities. ! 15: # ! 16: # osint is composed of one medium sized assembly module, with ! 17: # multiple entry points, and a collection of c functions. the ! 18: # entire interface is not in c due to the compiler's use of ! 19: # registers to pass parameters and other technicalities. all ! 20: # entries, except for sbchk, have five letter names starting ! 21: # with sys. ! 22: # ! 23: # when spitbol first starts execution, control passes to function ! 24: # main, just like in a normal c program. main processes any options ! 25: # and does other initialization chores. after completing ! 26: # initialization, main jumps to label sec04 to start ! 27: # the compiler itself. from that point, the compiler makes calls ! 28: # to sysxx routines to get service. ! 29: # ! 30: # the c functions are called from this module to do most of the ! 31: # hard and/or unix dependent work. an effort has been made to ! 32: # do all the system calls from c functions. this goal has not ! 33: # been entirely achieved. ! 34: # ! 35: # ! 36: # register masks ! 37: # ! 38: .set mr0,1 ! 39: .set mr1,2 ! 40: .set mr2,4 ! 41: .set mr3,8 ! 42: .set mr4,16 ! 43: .set mr5,32 ! 44: .set mr6,64 ! 45: .set mr7,128 ! 46: .set mr8,256 ! 47: .set mr9,512 ! 48: .set mr10,1024 ! 49: .set mr11,2048 ! 50: # ! 51: # c functions assume that r0 -> r5 are scratch. however, spitbol ! 52: # uses r2, r3, and r5. so, need to save these registers across ! 53: # function calls. ! 54: # ! 55: .set mr235,mr2+mr3+mr5 ! 56: # ! 57: # mask for all registers used by compiler. necessary for dealing ! 58: # with load modules. ! 59: # ! 60: .set cmpreg,mr2+mr3+mr5+mr6+mr7+mr8+mr9+mr10 ! 61: # ! 62: # miscellaneous equates ! 63: # ! 64: .set ch$lk,107 # upper case letter k ! 65: .set ch$mn,45 # dash (minus sign) ! 66: .set k,1024 ! 67: .set kwords,k*4 ! 68: # ! 69: # internal spitbol blocks ! 70: # ----------------------- ! 71: # ! 72: # these equates describe compiler control blocks used by osint. ! 73: # ! 74: # chain of file control blocks ! 75: # ! 76: .set chtyp,0 # type word ! 77: .set chlen,4 # block length ! 78: .set chnxt,8 # -> next chblk ! 79: .set chfcb,12 # -> fcb ! 80: .set chsize,16 # size of chblk ! 81: # ! 82: # icblk - integer block ! 83: # ! 84: .set ictyp,0 # type word ! 85: .set icval,4 # integer value ! 86: # ! 87: # scblk - string block ! 88: # ! 89: .set sctyp,0 # type word ! 90: .set sclen,4 # string length ! 91: .set scstr,8 # start of string ! 92: # ! 93: # interface control blocks ! 94: # ------------------------ ! 95: # ! 96: # these control blocks are built by the interface to handle i/o. ! 97: # for files other than standard input, standard output, and the ! 98: # terminal, these control blocks reside in the compiler's ! 99: # dynamic area. this requires appropriate setting of the type ! 100: # words to allow proper garbage collection. ! 101: # ! 102: # blocks with type b$xnt contain non-relocatable addresses - that ! 103: # is, no word may contain a pointer to another block in the ! 104: # dynamic area. ! 105: # ! 106: # blocks with type b$xrt contain relocatable addresses - that is ! 107: # words may contain a pointer to another block in the dynamic area. ! 108: # ! 109: # the basic structure is: ! 110: # ! 111: # for each input or output associated file there is: ! 112: # ! 113: # 1 ioblk containing all global information about ! 114: # the file: filename, buffer block pointer, ! 115: # file descriptor number, flags ! 116: # ! 117: # 1 bfblk containing the file buffer ! 118: # ! 119: # 1 or more fcblks containing the access mode (line or ! 120: # raw), the record length, and a pointer to ! 121: # the ioblk ! 122: # ! 123: # the first INPUT() or OUTPUT() call for a file creates one block ! 124: # of each type. subsequent calls to INPUT() or OUTPUT() for a ! 125: # previously associated file, may cause the creation of a new fcblk. ! 126: # allowing multiple fcblks provides the program with different ! 127: # ways of accessing the same file. for example, one type of access ! 128: # can be a character at a time and another entire records. ! 129: # ! 130: # the compiler keeps track of all active fcblks, and at times ! 131: # like end-of-job provides the inteface with a chain of all fcblks. ! 132: # ! 133: # ! 134: # bfblk - i/o buffer control block ! 135: # ! 136: .set bftyp,0 # type word - b$xnt ! 137: .set bflen,4 # block length ! 138: .set bfsiz,8 # buffer size in bytes ! 139: .set bfrem,12 # bytes remaining ! 140: .set bfoff,16 # offset to next remaining byte ! 141: .set bfsize,20 # end of fixed portion ! 142: # ! 143: # fcblk - file control block ! 144: # ! 145: .set fctyp,0 # type word - b$xrt ! 146: .set fclen,4 # block length ! 147: .set fcrsz,8 # record size ( >0 line mode / <0 raw mode) ! 148: .set fciob,12 # -> ioblk ! 149: .set fcsize,16 # size of fcblk ! 150: # ! 151: # ioblk - i/o control block ! 152: # ! 153: .set iotyp,0 # type word - b$xrt ! 154: .set iolen,4 # block length ! 155: .set iofnm,8 # -> filename scblk ! 156: .set iopid,12 # pid (if one end of pipe) ! 157: .set iobuf,16 # -> bfblk ! 158: .set iofdn,20 # file descriptor number ! 159: .set ioflg,24 # flags ! 160: .set iosize,28 # size of ioelt ! 161: # ! 162: # defines that match "spitio.h" for flags in ioflg ! 163: # ! 164: .set IO_INP,1 # input associated ! 165: .set IO_OUP,2 # output associated ! 166: .set IO_APP,4 # output open for append ! 167: .set IO_OPN,8 # file is open ! 168: .set IO_EOF,16 # eof on input file ! 169: .set IO_ERR,32 # i/o error ! 170: .set IO_SYS,64 # this is an osint file ! 171: .set IO_WRC,128 # don't do buffering ! 172: .set IO_PIP,256 # this is one end of a pipe ! 173: .set IO_DED,512 # other end of pipe died ! 174: .set IO_ILL,1024 # i/o illegal according to sysfc ! 175: # ! 176: # osint( argc,argv,environ ) is called just like the main ! 177: # function of a c program. ! 178: # ! 179: .globl _main ! 180: _main: .word 0 ! 181: # ! 182: # normal start - process all command arguments. ! 183: # ! 184: movl 4(ap),r4 # get number of options ! 185: movl r4,argc # and save ! 186: movl 8(ap),r6 # -> option pointers ! 187: movl r6,argv # and save ! 188: # ! 189: # if this is a restart from an load module, go handle. ! 190: # ! 191: tstl lmodstk # if load module stack != 0 then ! 192: jnequ rstart # go handle ! 193: # ! 194: tstl (r6)+ # program name not interesting ! 195: brb gtcont # process other args ! 196: gtarg: movl (r6)+,r0 # -> option text ! 197: cmpb $ch$mn,(r0) # if no leading - then ! 198: bnequ gtinp # treat as input filename ! 199: incl r0 # bump over - ! 200: 1: movb (r0)+,curopt+1 # set option character in table ! 201: movl $opttbl,r1 # -> option table ! 202: 2: cmpl curopt,(r1) # if we have found it then ! 203: beqlu 3f # process it ! 204: addl2 $optsiz,r1 # -> next table entry ! 205: brb 2b # loop until found ! 206: 3: movl optrtn(r1),r11 # -> option routine ! 207: jsb (r11) # call option routine ! 208: 4: tstb (r0) # if char is binary zeros then ! 209: beqlu gtcont # done with this arg ! 210: cmpb $040,(r0) # if next char is blank then ! 211: bnequ 5f ! 212: incl r0 # ignore it ! 213: brb 4b # and check next char ! 214: 5: cmpb $ch$mn,(r0) # if next char is not - then ! 215: bnequ 1b # treat as option character ! 216: incl r0 # else skip over - ! 217: brb 1b # and treat next char as option ! 218: gtinp: jsb optinp # process input filename(s) ! 219: gtcont: sobgtr r4,gtarg # loop thru all options ! 220: # ! 221: # switch to proper input file ! 222: # ! 223: pushl inpptr ! 224: pushl inpcnt ! 225: calls $2,_swcinp ! 226: # ! 227: # call to do initial switch of output files. ! 228: # ! 229: pushl _outptr ! 230: calls $1,_swcoup ! 231: # ! 232: # see if standard output is tty or not. ! 233: # ! 234: pushl $1 # file descriptor 1 ! 235: calls $1,_testty # call to check i/o chcaracteristics ! 236: tstl r0 # if r0 not 0 then ! 237: bnequ 0f # not a tty ! 238: clrl lnsppg # reset # lines per page ! 239: bisl2 $prtich,sptflg # else tell compiler ! 240: 0: ! 241: # ! 242: # set signals for execution ! 243: # ! 244: .globl _setsigs ! 245: calls $0,_setsigs # trap overflow signals ! 246: # ! 247: # allocate initial dynamic memory ! 248: # ! 249: mull3 meminc,$4,meminb# convert meminc to bytes ! 250: pushl meminb # memory request increment ! 251: calls $1,_sbrk # call to system call ! 252: movl r0,basmem # save base of memory ! 253: addl3 r0,meminb,topmem# computer top of memory ! 254: mull3 datwds,$4,r1 # convert max data words to bytes ! 255: addl3 r0,r1,maxmem # computer top of memory ! 256: 0: clrl (r0)+ # clear initial allocation ! 257: cmpl r0,topmem # loop until all cleared ! 258: blssu 0b ! 259: # ! 260: # set up lowest legal sp value, so that stack overflow can be detected, ! 261: # ! 262: mull3 $4,stksiz,r0 # convert words to bytes ! 263: subl3 r0,sp,lowsp # and compute lowest sp ! 264: movl sp,initsp # save initial sp ! 265: # ! 266: # clear registers, set dynamic area pointers, and jump off ! 267: # to compiler ! 268: # ! 269: clrl r2 ! 270: clrl r3 ! 271: clrl r4 ! 272: clrl r5 ! 273: clrl r6 ! 274: clrl r7 ! 275: clrl r8 ! 276: movl basmem,r9 ! 277: subl3 $4,topmem,r10 ! 278: jmp sec04 ! 279: # ! 280: # here to restart program after EXIT() call. this means we are now ! 281: # executing from an a.out file created by the interface. ! 282: # ! 283: rstart: ! 284: # ! 285: # before restoring stack, set up values for proper checking of ! 286: # stack overflow. (initial sp here will most probably differ ! 287: # from initial sp when compile was done.) ! 288: # ! 289: mull3 $4,stksiz,r0 # convert words to bytes ! 290: subl3 r0,sp,lowsp # and compute lowest sp ! 291: movl sp,initsp # save initial sp ! 292: jsb streloc # relocate pointers into stack ! 293: # ! 294: # restore stack from tscblk. ! 295: # ! 296: movl lmodstk,r0 # -> bottom word of stack ! 297: movab tscblk+scstr,r1 # -> top word of stack ! 298: 0: movl -(r0),-(sp) # relocate word of stack ! 299: cmpl r0,r1 # if not at end of relocation then ! 300: bgtru 0b # loop back ! 301: # ! 302: # if restarting, we can always access the command line arguments ! 303: # ! 304: movl $1,cmdcnt ! 305: # ! 306: # the system break will not be what it should, so reset it ! 307: # ! 308: pushl topmem ! 309: calls $1,_brk ! 310: # ! 311: # reset signals to what they should be. ! 312: # ! 313: calls $0,_setsigs ! 314: # ! 315: # forget about files open during compilation - ! 316: # ! 317: clrl inpptr # no input files ! 318: clrl inpcnt # so count is 0 too ! 319: clrl _outptr # no output file ! 320: clrl errfdn # no error file ! 321: # ! 322: # reset standard input buffer ! 323: # ! 324: clrl inpbf+bfrem # no remaining chars ! 325: clrl inpbf+bfoff # offset to next char ! 326: # ! 327: # restore compiler's registers and off we go. ! 328: # ! 329: popr $cmpreg # restore compiler's registers ! 330: addl2 $8,(sp) ! 331: rsb ! 332: # ! 333: # sbchk is called by the compiler to check for stack overflow. ! 334: # ! 335: .globl sbchk ! 336: sbchk: cmpl sp,lowsp # if sp is ok then ! 337: blssu 0f ! 338: rsb # return ! 339: 0: tstl (sp)+ # else pop stack ! 340: jmp sec05 # and go to stack overflow section ! 341: # ! 342: # sysef - eject file ! 343: # ! 344: .globl sysef ! 345: sysef: ! 346: pushr $mr235 ! 347: pushl fciob(r6) # -> ioblk ! 348: calls $1,_osopen # call to do open ! 349: tstl r0 # if open error then ! 350: jnequ erxit1 # take error exit ! 351: pushl $ffscb # -> ff scblk ! 352: pushl fciob(r6) # -> ioblk ! 353: pushl ffscb+sclen # record length ! 354: mnegl fcrsz(r6),-(sp) # i/o mode - raw or line ! 355: calls $4,_oswrite # call to do write ! 356: tstl r0 # if output error then ! 357: jneq erxit3 # signal failure ! 358: popr $mr235 ! 359: addl2 $12,(sp) ! 360: rsb ! 361: # ! 362: # sysej - end of job ! 363: # ! 364: .globl sysej ! 365: sysej: ! 366: movl r10,_rzfcb # copy head of fcb chain ! 367: beqlu 1f # if empty then nothing to close ! 368: 0: movl chfcb(r10),r1 # -> fcb ! 369: pushl fciob(r1) # -> ioblk ! 370: calls $1,_osclose # call to do close ! 371: movl chnxt(r10),r10 # -> next on chain ! 372: bnequ 0b # and loop back for more ! 373: 1: pushl r7 # return &code ! 374: calls $1,__exit ! 375: # ! 376: # sysen - endfile ! 377: # ! 378: .globl sysen ! 379: sysen: ! 380: pushr $mr235 ! 381: pushl fciob(r6) # -> ioblk ! 382: calls $1,_osopen # call to do open ! 383: tstl r0 # if open error then ! 384: jnequ erxit1 # take error exit ! 385: movl r$fcb,_rzfcb # copy fcb chain head ! 386: pushl fciob(r6) # -> ioblk ! 387: calls $1,_osclose # call to do close ! 388: popr $mr235 ! 389: addl2 $12,(sp) ! 390: rsb ! 391: # ! 392: # sysfc ! 393: # ! 394: .globl sysfc ! 395: sysfc: ! 396: movl (sp)+,(sp) # remove stacked scblk ! 397: pushr $mr235 ! 398: tstl sclen(r10) # if null filearg1 then ! 399: jeqlu erxit1 # error ! 400: # ! 401: # get length of filename and scan off options. ! 402: # ! 403: movl r9,-(sp) # -> filename scblk ! 404: calls $1,_lenfnm # call to get filename length ! 405: movl r0,lenfname # save length for later use ! 406: jlss erxit1 # length must not be negative ! 407: movl r9,-(sp) # -> filename scblk ! 408: movl $tioblk,-(sp) # -> temporary ioblk ! 409: movl r7,-(sp) # input/output association flag ! 410: calls $3,_sioarg # call to scan i/o args ! 411: tstl r0 # if error in args then ! 412: jlss erxit1 # take error return ! 413: # ! 414: # check for consistency of calls. cannot have both input ! 415: # and output to same channel. if this happens, though, ! 416: # set flag and let sysio take proper error exit. ! 417: # ! 418: tstl r6 # if no previous fcblk then ! 419: beqlu 0f # skip ! 420: movl fciob(r6),r0 # -> ioblk ! 421: movl ioflg(r0),r0 # get previous flags ! 422: mcoml $IO_INP+IO_OUP,r1 # get mask for bicl ! 423: bicl2 r1,r0 # remove all bits but INP&OUP ! 424: bitl tioblk+ioflg,r0 # if bits are not same then ! 425: bnequ 0f ! 426: bisl2 $IO_ILL,tioblk+ioflg # then set error flag ! 427: 0: ! 428: # ! 429: # handle null filenames here - must either have a previous ! 430: # fcblk or specify -f arg. ! 431: # ! 432: tstl lenfname # if non-null filename then ! 433: bgtr fcfnam # go handle below ! 434: bitl $IO_OPN,tioblk+ioflg ! 435: bnequ fcfarf # if -f specified then merge w/non-null ! 436: tstl r6 # if no previous fcblk then ! 437: jeqlu erxit1 # error ! 438: clrl r6 # assume that no new fcblk needed ! 439: clrl ioblkptr # no ioblk ptr to stuff ! 440: tstl tioblk # if however i/o args indicate one ! 441: jeqlu fcxit ! 442: movl fciob(r6),ioblkptr ! 443: movl $fcsize,r6 # allocate one ! 444: jbr fcxit ! 445: # ! 446: # handle real filenames and null filenames with -f arg here. ! 447: # note that they're mutually exclusive. ! 448: # ! 449: fcfnam: bitl $IO_OPN,tioblk+ioflg ! 450: jnequ erxit1 # can't have -f arg too ! 451: fcfarf: tstl r6 # if previous fcblk passed then ! 452: jnequ erxit1 # error ! 453: clrl ioblkptr ! 454: addl3 $bfsize+3,tioblk+iopid,r6 ! 455: bicl2 $3,r6 ! 456: movl r6,bfblksiz ! 457: addl2 $fcsize+iosize,r6 ! 458: movl $1,tioblk # set newfcb flag ! 459: # ! 460: fcxit: clrl r10 # no private fcblk ! 461: clrl r8 # xrblk please ! 462: popr $mr235 ! 463: addl2 $4,(sp) ! 464: rsb ! 465: # ! 466: # syshs ! 467: # ! 468: .globl syshs ! 469: syshs: ! 470: pushr $mr235 ! 471: cmpl $b$icl,(r6) # if arg1 not integer then ! 472: jnequ 9f # return host string ! 473: tstl icval(r6) # if integer 0 then ! 474: beqlu 1f # return -u argument ! 475: cmpl $1,icval(r6) # if integer 1 then ! 476: beqlu 2f # do system call ! 477: cmpl $2,icval(r6) # if integer 2 then ! 478: jeqlu 3f # return command arg ! 479: cmpl $3,icval(r6) # if integer 3 then ! 480: jeqlu 4f # return number of 1st #! arg ! 481: cmpl $4,icval(r6) # if integer 4 then ! 482: jeqlu 5f # return value of environment variable ! 483: jbr erxit1 # else arg error ! 484: # ! 485: 1: tstl uarg # if uarg is 0 then ! 486: jeqlu erxit4 # return null string ! 487: pushl tscblk # push scblk string length ! 488: pushl $tscblk # -> temp scblk ! 489: clrl -(sp) # ending character is 0 ! 490: pushl uarg # -> -u argument ! 491: calls $4,_cpys2sc # copy string to scblk ! 492: movab tscblk,r10 # -> temp scblk ! 493: jbr erxit3 # return ! 494: # ! 495: 2: cmpl $b$scl,(r10) # if 2nd arg not string then ! 496: jnequ erxit1 # return error ! 497: tstl sclen(r10) # if null string then ! 498: jeqlu erxit4 # return null string ! 499: pushl r10 # -> command string ! 500: calls $1,_dosys # call to do system call ! 501: jbr erxit4 # return null string ! 502: # ! 503: 3: cmpl $b$icl,(r10) # if 2nd arg not integer then ! 504: jnequ erxit1 # return error ! 505: movl tscblk,tscblk+sclen # set max length of scblk ! 506: pushab tscblk # push -> tscblk ! 507: pushl argv # push -> pointers ! 508: pushl argc # push number of args ! 509: pushl icval(r10) # arg requested ! 510: calls $4,_arg2scb # call to do real move ! 511: tstl r0 # if out of range then ! 512: jlss erxit6 # fail ! 513: jeqlu erxit4 # (if 0) return null string ! 514: movab tscblk,r10 # -> tscblk ! 515: jbr erxit3 # return ! 516: # ! 517: 4: tstl cmdcnt # if not invoked by #! then ! 518: jeqlu erxit6 # fail ! 519: movab temp1,r9 # -> temp icblk ! 520: movl $b$icl,(r9) # set integer block ! 521: movl cmdcnt,icval(r9)# set value ! 522: jbr erxit5 # return result ! 523: # ! 524: 5: cmpl $b$scl,(r10) # if 2nd arg not string then ! 525: jnequ erxit1 # return error ! 526: tstl sclen(r10) # if null string then ! 527: jeqlu erxit1 # return error ! 528: movl tscblk,tscblk+sclen # set max length of scblk ! 529: pushab tscblk # push -> tscblk ! 530: pushl r10 # -> environment variable requested ! 531: calls $2,_rdenv # fetch the environment variable ! 532: tstl r0 # if it couldn't be found ! 533: jlss erxit6 # fail ! 534: movab tscblk,r10 # else return tscblk ! 535: jbr erxit3 ! 536: # ! 537: 9: pushl hststr # push length of host string ! 538: pushab hststr # push -> host string scblk ! 539: calls $2,_gethost # call to get host string ! 540: tstl hststr+sclen # if null host string then ! 541: jeqlu erxit4 # return null string ! 542: movl $hststr,r10 # -> host string ! 543: jbr erxit3 # return ! 544: # ! 545: # sysid - return system id ! 546: # ! 547: .globl sysid ! 548: sysid: ! 549: movl $id1,r9 ! 550: movl $id2,r10 ! 551: rsb ! 552: # ! 553: # sysil - get input record length ! 554: # ! 555: .globl sysil ! 556: sysil: ! 557: movl fcrsz(r6),r6 ! 558: bgtr 0f ! 559: mnegl r6,r6 ! 560: 0: ! 561: rsb ! 562: # ! 563: # sysin - read input record ! 564: # ! 565: .globl sysin ! 566: sysin: ! 567: pushr $mr235 ! 568: pushl fciob(r6) # -> ioblk ! 569: calls $1,_osopen # call to open file ! 570: tstl r0 # if open unsuccessful then ! 571: jnequ erxit3 # take error exit ! 572: pushl r9 # -> scblk ! 573: pushl fciob(r6) # -> ioblk ! 574: pushl fcrsz(r6) # push record length ! 575: bgtr 0f ! 576: mnegl (sp),(sp) # if negative then make it positive ! 577: 0: pushl fcrsz(r6) # i/o mode - raw or line ! 578: calls $4,_osread # call to do read ! 579: cmpl r0,$-1 # check for eof or input error ! 580: jeql erxit1 # take eof exit ! 581: jlss erxit2 # take error exit ! 582: movl r0,sclen(r9) # set record length ! 583: popr $mr235 ! 584: addl2 $12,(sp) ! 585: rsb ! 586: # ! 587: # sysio ! 588: # ! 589: .globl sysio ! 590: sysio: ! 591: pushr $mr235 ! 592: bitl $IO_ILL,tioblk+ioflg ! 593: jnequ erxit2 # if illegal then take error exit ! 594: movl r6,fcblkptr # copy fcblk pointer for exit ! 595: # ! 596: # fill in fcblk. ! 597: # ! 598: tstl tioblk+iotyp # if no new fcb to build then ! 599: jeqlu iodon # done ! 600: movl $fcsize,fclen(r6) ! 601: movl tioblk+iolen,fcrsz(r6) ! 602: movl ioblkptr,fciob(r6) ! 603: jnequ iodon ! 604: movab fcsize(r6),fciob(r6) ! 605: # ! 606: # fill in ioblk. ! 607: # ! 608: movab fcsize(r6),r6 # -> ioblk ! 609: movl $b$xrt,(r6) ! 610: movl $iosize,iolen(r6) ! 611: movl r9,iofnm(r6) ! 612: clrl iopid(r6) ! 613: movab iosize(r6),iobuf(r6) ! 614: movl tioblk+iofdn,iofdn(r6) ! 615: movl tioblk+ioflg,ioflg(r6) ! 616: # ! 617: # if -f0 or -f1 specified then ! 618: # ! 619: # for -f0 ensure that buffer is same as osint's ! 620: # ! 621: # for -f1 no buffering should be done ! 622: # ! 623: bitl $IO_SYS,ioflg(r6) ! 624: beqlu 9f ! 625: cmpl $1,iofdn(r6) ! 626: blssu 9f ! 627: beqlu 1f ! 628: movl $inpbf,iobuf(r6) ! 629: jbr 9f ! 630: 1: clrl iobuf(r6) ! 631: bisl2 $IO_WRC,ioflg(r6) ! 632: 9: ! 633: # ! 634: # fill in bfblk ! 635: # ! 636: movab iosize(r6),r6 # -> bfblk ! 637: movl $b$xnt,(r6) ! 638: movl bfblksiz,bflen(r6) ! 639: movl tioblk+iopid,bfsiz(r6) ! 640: clrl bfrem(r6) ! 641: clrl bfoff(r6) ! 642: # ! 643: iodon: movl fcblkptr,r10 ! 644: clrl r8 ! 645: popr $mr235 ! 646: addl2 $8,(sp) ! 647: rsb ! 648: # ! 649: # sysmm - get more memory ! 650: # ! 651: .globl sysmm ! 652: sysmm: ! 653: cmpl topmem,maxmem # if already at top of memory then ! 654: blssu 0f ! 655: clrl r9 # no more to be had ! 656: rsb ! 657: 0: # else {alloc some more} ! 658: pushr $mr235 ! 659: pushl meminb # size in bytes of memory request ! 660: calls $1,_sbrk # call to get memory ! 661: popr $mr235 ! 662: tstl r0 # if memory obtained then ! 663: blss 1f ! 664: addl2 meminb,topmem # adjust current top ! 665: movl meminc,r9 # set number of words in block ! 666: rsb # return ! 667: 1: clrl r9 # else nothing to get ! 668: rsb ! 669: # ! 670: # sysmx - get maximum size of created objects ! 671: # ! 672: .globl sysmx ! 673: sysmx: ! 674: mull3 $4,maxsiz,r6 ! 675: rsb ! 676: # ! 677: # syspi - print on interactive channel (terminal) ! 678: # ! 679: .globl syspi ! 680: syspi: ! 681: movl $ttyiob,r11 ! 682: jbr piprt ! 683: # ! 684: # syspp - return print parameters ! 685: # ! 686: .globl syspp ! 687: syspp: ! 688: movl pagwid,r6 ! 689: movl lnsppg,r7 ! 690: movl sptflg,r8 ! 691: movl defcas,kvcas ! 692: rsb ! 693: # ! 694: # syspr - print on standard output ! 695: # ! 696: .globl syspr ! 697: syspr: ! 698: movl $oupiob,r11 ! 699: # ! 700: # handle both syspi and syspr here. ! 701: # ! 702: piprt: ! 703: pushr $mr235 ! 704: bisl2 $IO_WRC,ioflg(r11) # briefly set no buffering ! 705: pushl r9 # -> scblk ! 706: pushl r11 # -> ioblk ! 707: pushl r6 # number characters ! 708: pushl $1 # line mode ! 709: calls $4,_oswrite # call to do write ! 710: bicl2 $IO_WRC,ioflg(r11) # back to buffering ! 711: tstl r0 # if output error then ! 712: jneq erxit1 # indicate error return ! 713: popr $mr235 ! 714: addl2 $4,(sp) ! 715: rsb ! 716: # ! 717: # sysrd - read from standard input ! 718: # ! 719: .globl sysrd ! 720: sysrd: ! 721: pushr $mr235 ! 722: movl $inpiob,ioblkptr ! 723: # ! 724: # handle both sysrd and sysri here. ! 725: # ! 726: rdmrg: ! 727: pushl r9 # -> scblk ! 728: pushl ioblkptr # -> ioblk ! 729: pushl r8 # read length ! 730: pushl r8 # line mode ! 731: calls $4,_osread # call to do read ! 732: cmpl r0,$-1 # check for eof or input error ! 733: jeql rdeof # take eof exit ! 734: jlss erxit1 # take error exit ! 735: movl r0,sclen(r9) # set read length ! 736: # ! 737: # check for 1st record of standard input coming from a file specified ! 738: # on the command line. if all of these conditions are true, allow ! 739: # the program to access any arguments following the file name. ! 740: # ! 741: tstl rdrec1 # if already ready record 1 then ! 742: bnequ rdskp # skip ! 743: cmpl $inpiob,ioblkptr ! 744: bnequ rdskp # if sysri entry then skip ! 745: incl rdrec1 # indicate read 1st record from std input ! 746: tstl inpptr # if not file from command line then ! 747: beqlu rdskp # skip ! 748: cmpb $'#,scstr(r9) # if 1st char not # then ! 749: bnequ rdskp # skip ! 750: cmpb $'!,scstr+1(r9) # if 2nd char not ! then ! 751: bnequ rdskp # skip ! 752: subl3 inpcnt,argc,cmdcnt ! 753: incl cmdcnt # compute # args after filename ! 754: movl $1,inpcnt # reset input count ! 755: brb rdmrg # ignore 1st record and try again ! 756: rdskp: ! 757: popr $mr235 ! 758: addl2 $4,(sp) ! 759: rsb ! 760: # ! 761: # come here to handle eof for both sysrd and sysri. if eof ! 762: # is for sysrd, standard input, switch to next input file ! 763: # if one exists. ! 764: # ! 765: rdeof: movl ioblkptr,r4 # -> ioblk ! 766: tstl iofdn(r4) # if not file descriptor 0 then ! 767: jnequ erxit1 # real eof ! 768: pushl inpptr # push -> array of pointers ! 769: pushl inpcnt # push size of areray ! 770: calls $2,_swcinp # call to switch input files ! 771: tstl r0 # if more to read then ! 772: jeqlu rdmrg # read it ! 773: jmp erxit1 # else signal eof ! 774: # ! 775: # sysri - read from interactive channel (terminal) ! 776: # ! 777: .globl sysri ! 778: sysri: ! 779: pushr $mr235 ! 780: movl $ttyiob,ioblkptr ! 781: jbr rdmrg ! 782: # ! 783: # sysst - set file pointer ! 784: # ! 785: .globl sysst ! 786: sysst: ! 787: pushr $mr235 ! 788: pushl fciob(r6) # -> ioblk ! 789: calls $1,_osopen # call to do open ! 790: tstl r0 # if file open error then ! 791: jnequ erxit3 # return error ! 792: # ! 793: movl fciob(r6),r1 # -> ioblk ! 794: bitl $IO_PIP,ioflg(r1) ! 795: jnequ erxit4 # if pipe then set not allowed ! 796: cmpl iofdn(r1),$2 # if fd < 2 then ! 797: jlssu erxit4 # set not allowed ! 798: # ! 799: cmpl $b$icl,(r7) # if already integer then ! 800: bnequ 0f ! 801: movl icval(r7),temp1 # grab value ! 802: brb 1f ! 803: 0: cmpl $b$scl,(r7) # else if not a string then ! 804: jnequ erxit1 # error ! 805: clrl temp3 # clear scnint character count ! 806: pushl $temp3 # -> temp3 ! 807: pushl sclen(r7) # string length ! 808: pushab scstr(r7) # -> string ! 809: calls $3,_scnint # call to scan integer ! 810: movl r0,temp1 # and save ! 811: 1: ! 812: # ! 813: cmpl $b$icl,(r8) # if already integer then ! 814: bnequ 0f ! 815: movl icval(r8),temp2 # grab value ! 816: brb 1f ! 817: 0: cmpl $b$scl,(r8) # else if not a string then ! 818: jnequ erxit1 # error ! 819: clrl temp3 # clear scnint character count ! 820: pushl $temp3 # -> temp3 ! 821: pushl sclen(r8) # string length ! 822: pushab scstr(r8) # -> string ! 823: calls $3,_scnint # call to scan integer ! 824: movl r0,temp2 # and save ! 825: 1: ! 826: # ! 827: pushl temp2 # whence ! 828: pushl temp1 # offset ! 829: pushl fciob(r6) # -> ioblk ! 830: calls $3,_doset # call to do set ! 831: popr $mr235 ! 832: addl2 $20,(sp) ! 833: rsb ! 834: # ! 835: # systm - get execution time so far ! 836: # ! 837: .globl systm ! 838: systm: ! 839: pushr $mr2+mr3 ! 840: movl $tscblk+8,-(sp) # -> times buffer ! 841: calls $1,_times # call to do times ! 842: movl tscblk+8,r5 # get user time in 60ths ! 843: mull2 $100,r5 # mulitply by 100 to get 6000ths ! 844: divl2 $6,r5 # divide by 6 to get 1000ths ! 845: popr $mr2+mr3 ! 846: rsb ! 847: # ! 848: # sysxi - exit from executing program ! 849: # ! 850: .globl sysxi ! 851: sysxi: ! 852: tstl r10 # if 0 instead of scblk then ! 853: jeqlu xilmod # try to write load module ! 854: pushr $mr235 ! 855: cmpl $b$scl,(r10) # if not scblk then ! 856: jnequ erxit1 # error ! 857: pushl r10 # push scblk pointer ! 858: calls $1,_doexec # go do exit ! 859: jmp erxit2 # should never return ! 860: # ! 861: # write load module ! 862: # ! 863: xilmod: tstl r5 # if r5 <= 0 then ! 864: bgtr 0f ! 865: pushr $mr235 # save regs for error exits ! 866: jbr erxit1 # and take error exit ! 867: 0: pushr $cmpreg # else save all compiler regs ! 868: # ! 869: # need to save stack contents, so that when load module is ! 870: # invoked, stack can be recreated. ! 871: # ! 872: subl3 sp,initsp,r0 # compute depth of stack ! 873: cmpl r0,tscblk # if stack won't fit in tscblk then ! 874: jgtru xi2big # big trouble ! 875: movl sp,r0 # -> into real stack ! 876: movab tscblk+scstr,r1 # -> save stack area ! 877: 1: movl (r0)+,(r1)+ # copy word of stack ... ! 878: cmpl r0,initsp # until hit top word ! 879: blssu 1b ! 880: movl r1,lmodstk # set top of saved stack ! 881: # ! 882: # before creating the load module, we must relativize the ! 883: # compiler cells that point into the stack. We do this by ! 884: # temporarily negating initsp, calling streloc, and then ! 885: # restoring initsp. After the load module has been written, ! 886: # another call to streloc will restore the stack pointers. ! 887: # ! 888: mnegl initsp,initsp # negate initsp so streloc will subtract ! 889: jsb streloc # relativize the compiler cells ! 890: mnegl initsp,initsp # restore initsp to its previous value ! 891: # ! 892: # create a.out header in hststr scblk. ! 893: # ! 894: addl3 $1023,dnamp,r1 # round current memory in use ! 895: bicl3 $0x3ff,r1,-(sp) # to a multiple of the page size ! 896: movab hststr+scstr,r0 # -> a.out header block ! 897: pushl r0 # which will be the other argument ! 898: movl $0413,(r0)+ # set magic number ! 899: bicl3 $0x3ff,$_etext,r1 # get text size, rounded down ! 900: movl r1,(r0)+ # and place it in a.out header ! 901: subl3 r1,4(sp),(r0)+ # data size = total - text size ! 902: clrl (r0)+ # we will use no bss ! 903: clrl (r0)+ ! 904: clrl (r0)+ # set starting address ! 905: clrl (r0)+ ! 906: clrl (r0)+ ! 907: # ! 908: # call a workhorse c routine to actually write a.out file. ! 909: # the amount of memory to write has already been pushed. ! 910: # ! 911: calls $2,_wrtaout # call to write a.out ! 912: # ! 913: # restore compiler cells to their previous values ! 914: # ! 915: jsb streloc # unrelativize stack pointers ! 916: # ! 917: tstl r0 # if error creating a.out then ! 918: blss xi2big # return error ! 919: # ! 920: # pop registers and set up call to sysej ! 921: # ! 922: popr $cmpreg # restore all registers ! 923: movl r7,r10 # -> chain of fcbs ! 924: clrl r7 # set &CODE = 0 ! 925: jsb sysej # call to end run ! 926: # ! 927: # if stack too big ! 928: # ! 929: xi2big: popr $cmpreg # restore all regs ! 930: pushr $mr235 # push correct regs ! 931: jbr erxit2 # take error exit ! 932: # ! 933: # error/ppm exits - pick up n-th word following jsb and return ! 934: # to address contained in that word. ! 935: # ! 936: erxit1: ! 937: popr $mr235 ! 938: movl (sp)+,r11 ! 939: jmp *(r11)+ ! 940: # ! 941: erxit2: ! 942: popr $mr235 ! 943: addl3 $4,(sp)+,r11 ! 944: jmp *(r11)+ ! 945: # ! 946: erxit3: ! 947: popr $mr235 ! 948: addl3 $8,(sp)+,r11 ! 949: jmp *(r11)+ ! 950: # ! 951: erxit4: ! 952: popr $mr235 ! 953: addl3 $12,(sp)+,r11 ! 954: jmp *(r11)+ ! 955: # ! 956: erxit5: ! 957: popr $mr235 ! 958: addl3 $16,(sp)+,r11 ! 959: jmp *(r11)+ ! 960: # ! 961: erxit6: ! 962: popr $mr235 ! 963: addl3 $20,(sp)+,r11 ! 964: jmp *(r11)+ ! 965: # ! 966: # streloc - relocate stack pointers. this routine adds ! 967: # initsp to every cell whose address appears in strellst. ! 968: # ! 969: streloc: ! 970: pushr $mr0+mr1 ! 971: moval strellst,r1 # start of list of thing to relocate ! 972: jbr strel1 # jump into the loop ! 973: strel0: addl2 initsp,(r0) # relocate a pointer ! 974: strel1: movl (r1)+,r0 # fetch a pointer to a cell ! 975: jneq strel0 # if zero, we're done ! 976: popr $mr0+mr1 ! 977: rsb ! 978: # ! 979: # option routines ! 980: # ! 981: # optclr clears a flag ! 982: # opterr signals an error ! 983: # optfld sets defcas to 0 for no folding ! 984: # optnum get numeric value ! 985: # optset set option value ! 986: # ! 987: # optclr ! 988: # ! 989: optclr: bicl2 optflg(r1),sptflg ! 990: rsb ! 991: # ! 992: # opterr ! 993: # ! 994: opterr: pushr $mr0+mr1+mr2+mr3+mr4+mr5 ! 995: pushl $6 ! 996: pushl $curopt ! 997: pushl $2 ! 998: calls $3,_write ! 999: popr $mr0+mr1+mr2+mr3+mr4+mr5 ! 1000: rsb ! 1001: # ! 1002: # optinp ! 1003: # ! 1004: optinp: tstl inpptr # if already processed input filenames then ! 1005: bnequ opterr # error ! 1006: subl3 $4,r6,inpptr # -> first input filename ! 1007: movl r4,inpcnt # set number of filenames ! 1008: movl $1,r4 # done scanning options ! 1009: rsb # return ! 1010: # ! 1011: # optfld ! 1012: # ! 1013: optfld: clrl defcas ! 1014: rsb ! 1015: # ! 1016: # optnum ! 1017: # ! 1018: optnum: pushl r0 # -> number ! 1019: jsb getnum # get number ! 1020: movl (sp)+,r0 # -> byte past last digit ! 1021: movzbl (r0),r2 # get byte past last digit ! 1022: bisb2 $040,r2 # fold to lower case ! 1023: cmpb $ch$lk,r2 # if number followed by k then ! 1024: bnequ 0f ! 1025: mull2 $1024,r5 # mulitply by 1024 ! 1026: incl r0 # skip over k ! 1027: 0: tstl r5 # if number zero or negative ! 1028: bleq opterr # treat as error ! 1029: movl r5,*optflg(r1) # store option ! 1030: rsb # return ! 1031: # ! 1032: # optoup ! 1033: # ! 1034: optoup: cmpl $2,r4 # if no option after -o then ! 1035: bgtru opterr # error ! 1036: movl (r6),r1 # -> output filename ! 1037: cmpb $ch$mn,(r1) # if filename starts with - then ! 1038: beqlu opterr # error ! 1039: movl (r6)+,_outptr # save pointer to output filename ! 1040: decl r4 # one less option to process ! 1041: rsb # return ! 1042: # ! 1043: # optset ! 1044: # ! 1045: optset: bisl2 optflg(r1),sptflg ! 1046: rsb ! 1047: # ! 1048: # optusr ! 1049: # ! 1050: optusr: cmpl $2,r4 # if fewer than 2 options then ! 1051: jgtru opterr # can't have argument ! 1052: movl (r6)+,uarg # save -> argument ! 1053: decl r4 # dec number of remaining options ! 1054: rsb ! 1055: # ! 1056: # getnum ! 1057: # ! 1058: # (sp) -> string to convert ! 1059: # jsb getnum ! 1060: # (sp) -> char after last digit ! 1061: # (r5) converted number ! 1062: # ! 1063: getnum: ! 1064: movl 4(sp),r7 # -> string ! 1065: clrl r5 # clear accumulator ! 1066: 0: cmpb $060,(r7) # if not a decimal digit then ! 1067: bgtru 1f # done with conversion ! 1068: cmpb $071,(r7) # ! 1069: blssu 1f ! 1070: movzbl (r7)+,r8 # load digit ! 1071: subl2 $060,r8 # remove unnecessary bits ! 1072: mull2 $10,r5 # accum * 10 ! 1073: addl2 r8,r5 # add in this digit ! 1074: brb 0b ! 1075: 1: movl r7,4(sp) # return address of next byte ! 1076: rsb # return ! 1077: # ! 1078: # interface data area ! 1079: # ------------------- ! 1080: # ! 1081: .data 1 ! 1082: # ! 1083: # flags for compiler ! 1084: # ! 1085: .set errors,1 # send errors to terminal ! 1086: .set prtich,2 # standard printer is terminal ! 1087: .set nolist,4 # suppress compilation listing ! 1088: .set nocmps,8 # suppress compilation statistics ! 1089: .set noexcs,16 # suppress execution statistics ! 1090: .set lnglst,32 # generate page ejects ! 1091: .set noexec,64 # suppress program execution ! 1092: .set trmnal,128 # terminal i/o association ! 1093: .set stdlst,256 # standard listing (intermediate) ! 1094: .set nohedr,512 # suppress sysid header ! 1095: # ! 1096: .set deflag,errors+nolist+nocmps+noexcs+trmnal+nohedr ! 1097: # ! 1098: # option table ! 1099: # ! 1100: .set opttxt,0 # option characters ! 1101: .set optflg,4 # option flag - flags or address ! 1102: .set optrtn,8 # -> option processing routine ! 1103: .set optsiz,12 # size in bytes of entry ! 1104: # ! 1105: opttbl: ! 1106: .ascii "-f " ! 1107: .long 0,optfld ! 1108: # ! 1109: .ascii "-e " ! 1110: .long errors,optclr ! 1111: # ! 1112: .ascii "-l " ! 1113: .long nolist,optclr ! 1114: # ! 1115: .ascii "-c " ! 1116: .long nocmps,optclr ! 1117: # ! 1118: .ascii "-x " ! 1119: .long noexcs,optclr ! 1120: # ! 1121: .ascii "-a " ! 1122: .long nolist+nocmps+noexcs,optclr ! 1123: # ! 1124: .ascii "-p " ! 1125: .long lnglst,optset ! 1126: # ! 1127: .ascii "-z " ! 1128: .long stdlst,optset ! 1129: # ! 1130: .ascii "-h " ! 1131: .long nohedr,optclr ! 1132: # ! 1133: .ascii "-n " ! 1134: .long noexec,optset ! 1135: # ! 1136: .ascii "-m " ! 1137: .long maxsiz,optnum ! 1138: # ! 1139: .ascii "-s " ! 1140: .long stksiz,optnum ! 1141: # ! 1142: .ascii "-d " ! 1143: .long datwds,optnum ! 1144: # ! 1145: .ascii "-i " ! 1146: .long meminc,optnum ! 1147: # ! 1148: .ascii "-o " ! 1149: .long 0,optoup ! 1150: # ! 1151: .ascii "-u " ! 1152: .long 0,optusr ! 1153: # ! 1154: curopt: .ascii "- " ! 1155: .ascii "?\n " ! 1156: .long opterr ! 1157: .align 2 ! 1158: # ! 1159: # standard input/output pointers ! 1160: # ! 1161: inpcnt: .long 0 ! 1162: inpptr: .long 0 ! 1163: .globl _outptr ! 1164: _outptr: .long 0 ! 1165: # ! 1166: # pointer to -u arg ! 1167: # ! 1168: uarg: .long 0 ! 1169: # ! 1170: # save argc and argv from initial call ! 1171: # ! 1172: argc: .long 0 ! 1173: argv: .long 0 ! 1174: # ! 1175: # #! data areas ! 1176: # ! 1177: cmdcnt: .long 0 # number of command args ! 1178: rdrec1: .long 0 # read record 1 from std in flag ! 1179: # ! 1180: # standard ioblks ! 1181: # ! 1182: inpiob: .space iobuf ! 1183: .long inpbf # -> input bfblk ! 1184: .long 0 # file descriptor ! 1185: .long IO_INP|IO_OPN|IO_SYS ! 1186: # ! 1187: inpbf: .space bfsiz ! 1188: .long 1024 # buffer size ! 1189: .long 0 # remaining chars to read ! 1190: .long 0 # offset to next character to read ! 1191: .space 1024 # buffer ! 1192: # ! 1193: # ! 1194: oupiob: .space iobuf ! 1195: .long 0 # no buffer ! 1196: .long 1 # file descriptor number ! 1197: .long IO_OUP|IO_OPN|IO_SYS ! 1198: # ! 1199: # ! 1200: ttyiob: .space iobuf ! 1201: .long ttybf # -> tty buffer input ! 1202: .long 2 # file descriptor number ! 1203: .long IO_INP|IO_OUP|IO_OPN|IO_SYS ! 1204: # ! 1205: ttybf: .space bfsiz ! 1206: .long 258 # buffer size ! 1207: .long 0 # remaining chars to read ! 1208: .long 0 # offset to next char to read ! 1209: .space 258 # buffer ! 1210: .align 2 ! 1211: # ! 1212: .globl _rzfcb ! 1213: _rzfcb: .long 0 ! 1214: # ! 1215: fildes: .long 0 ! 1216: pr_len: .long 0 ! 1217: rd_len: .long 0 ! 1218: lenfname: .long 0 ! 1219: ioblkptr: .long 0 ! 1220: bfblkptr: .long 0 ! 1221: bfblksiz: .long 0 ! 1222: fcblkptr: .long 0 ! 1223: tioblk: .space iosize ! 1224: # ! 1225: # memory allocation variables ! 1226: # ! 1227: meminc: .long 4*k # increment in words for sbrk ! 1228: meminb: .long 0 # meminc * 4 (to get bytes) ! 1229: datwds: .long 256*k # max size in words of dynamic area ! 1230: basmem: .long 0 # base of dynamic memory ! 1231: topmem: .long 0 # current top of dynamic memory ! 1232: maxmem: .long 0 # maximum top of dynamic memory ! 1233: maxsiz: .long 8*k # maximum object size in words ! 1234: stksiz: .long 2*k # stack size in words ! 1235: initsp: .long 0 # initial value of sp on entry to sec04 ! 1236: lowsp: .long 0 # lowest legal sp value ! 1237: # ! 1238: # default value for &case ! 1239: # ! 1240: defcas: .long 1 ! 1241: # ! 1242: # values given to syspp for print parameters ! 1243: # ! 1244: lnsppg: .long 60 # lines per page ! 1245: pagwid: .long 120 # page width ! 1246: sptflg: .long deflag # flags ! 1247: # ! 1248: # flag that indicates that this is a load module. also, serves ! 1249: # the dual purpose of indicating size of saved stack. ! 1250: # ! 1251: lmodstk: .long 0 ! 1252: # ! 1253: temp1: .long 0 ! 1254: temp2: .long 0 ! 1255: temp3: .long 0 ! 1256: # ! 1257: nulstr: .long 0,0 ! 1258: # ! 1259: tscblk: .long 512,0 ! 1260: .space 512 ! 1261: # ! 1262: hststr: .long 128,0 ! 1263: .space 128 ! 1264: # ! 1265: id1: .long 0,id1l ! 1266: .ascii "(0.0)" ! 1267: id1e: ! 1268: .set id1l,id1e-id1-8 ! 1269: .align 2 ! 1270: # ! 1271: id2: .long 0,id2l ! 1272: .ascii "VAX/UNIX Version" ! 1273: id2e: ! 1274: .set id2l,id2e-id2-8 ! 1275: .align 2 ! 1276: # ! 1277: ffscb: .long 0,1 ! 1278: ffstr: .byte 12 ! 1279: # ! 1280: nlstr: .ascii "\n" ! 1281: .align 2 ! 1282: # ! 1283: errfdn: .long 0 ! 1284: # ! 1285: # The following pointers address those cells in the compiler ! 1286: # that point into the stack when a load module might be written, ! 1287: # and which must therefore be relocated. ! 1288: strellst: ! 1289: .long flptr ! 1290: .long stbas ! 1291: .long gtcef ! 1292: .long 0 # end of list marker
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