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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 oupptr ! 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 oupptr # 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: # unsupported entries that simply return. ! 343: # ! 344: .globl sysdc ! 345: sysdc: ! 346: .globl sysdm ! 347: sysdm: ! 348: .globl systt ! 349: systt: ! 350: .globl sysul ! 351: sysul: ! 352: rsb ! 353: # ! 354: # unsupported that take error returns ! 355: # ! 356: .globl sysex ! 357: sysex: ! 358: .globl sysld ! 359: sysld: ! 360: pushr $mr235 # save ye registers ! 361: jbr erxit1 ! 362: # ! 363: # sysax - after execution call ! 364: # ! 365: # sysax is called immediately after execution, so that the interface ! 366: # can do any cleanup. here, the standard output file is switched, if ! 367: # necessary back to the listing file. ! 368: # ! 369: .globl sysax ! 370: sysax: ! 371: pushr $mr235 ! 372: pushl oupptr ! 373: calls $1,_swcoup ! 374: popr $mr235 ! 375: rsb ! 376: # ! 377: # sysbx - before execution call ! 378: # ! 379: # sysbx is called after compilation and before execution begins. ! 380: # sysbx allows the inteface to do any cleanup. here, the standard ! 381: # listing file is switched to the standard output file. ! 382: # ! 383: .globl sysbx ! 384: sysbx: ! 385: pushr $mr235 ! 386: pushl oupptr ! 387: calls $1,_swcoup ! 388: popr $mr235 ! 389: rsb ! 390: # ! 391: # sysdt - get current date ! 392: # ! 393: # return both date and time ! 394: # ! 395: # jsb sysdt # call to get date ! 396: # (r10) # -> scblk ! 397: # ! 398: .globl sysdt ! 399: sysdt: ! 400: pushr $mr235 ! 401: movl $tscblk,r10 ! 402: movl $17,sclen(r10) # dd/mm/yy hh.mm.ss ! 403: pushl $tscblk+scstr ! 404: calls $1,_getdate ! 405: popr $mr235 ! 406: rsb ! 407: # ! 408: # sysef - eject file ! 409: # ! 410: .globl sysef ! 411: sysef: ! 412: pushr $mr235 ! 413: pushl fciob(r6) # -> ioblk ! 414: calls $1,_osopen # call to do open ! 415: tstl r0 # if open error then ! 416: jnequ erxit1 # take error exit ! 417: pushl $ffscb # -> ff scblk ! 418: pushl fciob(r6) # -> ioblk ! 419: pushl ffscb+sclen # record length ! 420: mnegl fcrsz(r6),-(sp) # i/o mode - raw or line ! 421: calls $4,_oswrite # call to do write ! 422: tstl r0 # if output error then ! 423: jneq erxit3 # signal failure ! 424: popr $mr235 ! 425: addl2 $12,(sp) ! 426: rsb ! 427: # ! 428: # sysej - end of job ! 429: # ! 430: .globl sysej ! 431: sysej: ! 432: movl r10,_rzfcb # copy head of fcb chain ! 433: beqlu 1f # if empty then nothing to close ! 434: 0: movl chfcb(r10),r1 # -> fcb ! 435: pushl fciob(r1) # -> ioblk ! 436: calls $1,_osclose # call to do close ! 437: movl chnxt(r10),r10 # -> next on chain ! 438: bnequ 0b # and loop back for more ! 439: 1: pushl r7 # return &code ! 440: calls $1,__exit ! 441: # ! 442: # sysem - get error message text ! 443: # ! 444: .globl sysem ! 445: sysem: ! 446: pushr $mr235 ! 447: movl $tscblk,r9 # -> temp scblk ! 448: clrl sclen(r9) # default error text is null string ! 449: tstl errfdn # if error fd exists then ! 450: bnequ 0f # skip open ! 451: calls $0,_openerr # else open error text file ! 452: movl r0,errfdn # and save fd ! 453: 0: tstl errfdn # if no error text file then ! 454: blss emxit # return null string ! 455: decl r6 # errors start at 1 ! 456: blss emxit # but don't have error 0 ! 457: mull2 $49,r6 # compute byte offset of error text ! 458: pushl $0 # whence ! 459: pushl r6 # offset ! 460: pushl errfdn # file descriptor number ! 461: calls $3,_lseek # call to do seek ! 462: tstl r0 # if lseek fails then ! 463: blss emxit # return null string ! 464: pushl $48 # error text length w/out nl ! 465: pushl $tscblk+8 # buffer address ! 466: pushl errfdn # file descriptor number ! 467: calls $3,_read # call to do read ! 468: tstl r0 # if read failed then ! 469: blss emxit # return null string ! 470: 1: cmpb $' ,tscblk+7(r0)# if last character is ! 471: bneq 2f # nonblank, return length ! 472: sobgeq r0,1b # otherwise discard the blank, try again ! 473: 2: movl r0,sclen(r9) # set actual length ! 474: emxit: ! 475: popr $mr235 ! 476: rsb # return ! 477: # ! 478: # sysen - endfile ! 479: # ! 480: .globl sysen ! 481: sysen: ! 482: pushr $mr235 ! 483: movl r$fcb,_rzfcb # copy fcb chain head ! 484: pushl fciob(r6) # -> ioblk ! 485: calls $1,_osclose # call to do close ! 486: popr $mr235 ! 487: addl2 $12,(sp) ! 488: rsb ! 489: # ! 490: # sysej - eject standard output ! 491: # ! 492: .globl sysep ! 493: sysep: ! 494: pushr $mr235 ! 495: pushl $1 # 1 character ! 496: pushl $ffstr # -> ff ! 497: pushl $1 # fd 1 ! 498: calls $3,_write # call to do write ! 499: popr $mr235 ! 500: rsb ! 501: # ! 502: # sysfc ! 503: # ! 504: .globl sysfc ! 505: sysfc: ! 506: movl (sp)+,(sp) # remove stacked scblk ! 507: pushr $mr235 ! 508: tstl sclen(r10) # if null filearg1 then ! 509: jeqlu erxit1 # error ! 510: # ! 511: # get length of filename and scan off options. ! 512: # ! 513: movl r9,-(sp) # -> filename scblk ! 514: calls $1,_lenfnm # call to get filename length ! 515: movl r0,lenfname # save length for later use ! 516: jlss erxit1 # length must not be negative ! 517: movl r9,-(sp) # -> filename scblk ! 518: movl $tioblk,-(sp) # -> temporary ioblk ! 519: movl r7,-(sp) # input/output association flag ! 520: calls $3,_sioarg # call to scan i/o args ! 521: tstl r0 # if error in args then ! 522: jlss erxit1 # take error return ! 523: # ! 524: # check for consistency of calls. cannot have both input ! 525: # and output to same channel. if this happens, though, ! 526: # set flag and let sysio take proper error exit. ! 527: # ! 528: tstl r6 # if no previous fcblk then ! 529: beqlu 0f # skip ! 530: movl fciob(r6),r0 # -> ioblk ! 531: movl ioflg(r0),r0 # get previous flags ! 532: mcoml $IO_INP+IO_OUP,r1 # get mask for bicl ! 533: bicl2 r1,r0 # remove all bits but INP&OUP ! 534: bitl tioblk+ioflg,r0 # if bits are not same then ! 535: bnequ 0f ! 536: bisl2 $IO_ILL,tioblk+ioflg # then set error flag ! 537: 0: ! 538: # ! 539: # handle null filenames here - must either have a previous ! 540: # fcblk or specify -f arg. ! 541: # ! 542: tstl lenfname # if non-null filename then ! 543: bgtr fcfnam # go handle below ! 544: bitl $IO_OPN,tioblk+ioflg ! 545: bnequ fcfarf # if -f specified then merge w/non-null ! 546: tstl r6 # if no previous fcblk then ! 547: jeqlu erxit1 # error ! 548: clrl r6 # assume that no new fcblk needed ! 549: clrl ioblkptr # no ioblk ptr to stuff ! 550: tstl tioblk # if however i/o args indicate one ! 551: jeqlu fcxit ! 552: movl fciob(r6),ioblkptr ! 553: movl $fcsize,r6 # allocate one ! 554: jbr fcxit ! 555: # ! 556: # handle real filenames and null filenames with -f arg here. ! 557: # note that they're mutually exclusive. ! 558: # ! 559: fcfnam: bitl $IO_OPN,tioblk+ioflg ! 560: jnequ erxit1 # can't have -f arg too ! 561: fcfarf: tstl r6 # if previous fcblk passed then ! 562: jnequ erxit1 # error ! 563: clrl ioblkptr ! 564: addl3 $bfsize+3,tioblk+iopid,r6 ! 565: bicl2 $3,r6 ! 566: movl r6,bfblksiz ! 567: addl2 $fcsize+iosize,r6 ! 568: movl $1,tioblk # set newfcb flag ! 569: # ! 570: fcxit: clrl r10 # no private fcblk ! 571: clrl r8 # xrblk please ! 572: popr $mr235 ! 573: addl2 $4,(sp) ! 574: rsb ! 575: # ! 576: # syshs ! 577: # ! 578: .globl syshs ! 579: syshs: ! 580: pushr $mr235 ! 581: cmpl $b$icl,(r6) # if arg1 not integer then ! 582: jnequ 9f # return host string ! 583: tstl icval(r6) # if integer 0 then ! 584: beqlu 1f # return -u argument ! 585: cmpl $1,icval(r6) # if integer 1 then ! 586: beqlu 2f # do system call ! 587: cmpl $2,icval(r6) # if integer 2 then ! 588: jeqlu 3f # return command arg ! 589: cmpl $3,icval(r6) # if integer 3 then ! 590: jeqlu 4f # return number of 1st #! arg ! 591: cmpl $4,icval(r6) # if integer 4 then ! 592: jeqlu 5f # return value of environment variable ! 593: jbr erxit1 # else arg error ! 594: # ! 595: 1: tstl uarg # if uarg is 0 then ! 596: jeqlu erxit4 # return null string ! 597: pushl tscblk # push scblk string length ! 598: pushl $tscblk # -> temp scblk ! 599: clrl -(sp) # ending character is 0 ! 600: pushl uarg # -> -u argument ! 601: calls $4,_cpys2sc # copy string to scblk ! 602: movab tscblk,r10 # -> temp scblk ! 603: jbr erxit3 # return ! 604: # ! 605: 2: cmpl $b$scl,(r10) # if 2nd arg not string then ! 606: jnequ erxit1 # return error ! 607: tstl sclen(r10) # if null string then ! 608: jeqlu erxit4 # return null string ! 609: pushl r10 # -> command string ! 610: calls $1,_dosys # call to do system call ! 611: jbr erxit4 # return null string ! 612: # ! 613: 3: cmpl $b$icl,(r10) # if 2nd arg not integer then ! 614: jnequ erxit1 # return error ! 615: movl tscblk,tscblk+sclen # set max length of scblk ! 616: pushab tscblk # push -> tscblk ! 617: pushl argv # push -> pointers ! 618: pushl argc # push number of args ! 619: pushl icval(r10) # arg requested ! 620: calls $4,_arg2scb # call to do real move ! 621: tstl r0 # if out of range then ! 622: jlss erxit6 # fail ! 623: jeqlu erxit4 # (if 0) return null string ! 624: movab tscblk,r10 # -> tscblk ! 625: jbr erxit3 # return ! 626: # ! 627: 4: tstl cmdcnt # if not invoked by #! then ! 628: jeqlu erxit6 # fail ! 629: movab temp1,r9 # -> temp icblk ! 630: movl $b$icl,(r9) # set integer block ! 631: movl cmdcnt,icval(r9)# set value ! 632: jbr erxit5 # return result ! 633: # ! 634: 5: cmpl $b$scl,(r10) # if 2nd arg not string then ! 635: jnequ erxit1 # return error ! 636: tstl sclen(r10) # if null string then ! 637: jeqlu erxit1 # return error ! 638: movl tscblk,tscblk+sclen # set max length of scblk ! 639: pushab tscblk # push -> tscblk ! 640: pushl r10 # -> environment variable requested ! 641: calls $2,_rdenv # fetch the environment variable ! 642: tstl r0 # if it couldn't be found ! 643: jlss erxit6 # fail ! 644: movab tscblk,r10 # else return tscblk ! 645: jbr erxit3 ! 646: # ! 647: 9: pushl hststr # push length of host string ! 648: pushab hststr # push -> host string scblk ! 649: calls $2,_gethost # call to get host string ! 650: tstl hststr+sclen # if null host string then ! 651: jeqlu erxit4 # return null string ! 652: movl $hststr,r10 # -> host string ! 653: jbr erxit3 # return ! 654: # ! 655: # sysid - return system id ! 656: # ! 657: .globl sysid ! 658: sysid: ! 659: movl $id1,r9 ! 660: movl $id2,r10 ! 661: rsb ! 662: # ! 663: # sysil - get input record length ! 664: # ! 665: .globl sysil ! 666: sysil: ! 667: movl fcrsz(r6),r6 ! 668: bgtr 0f ! 669: mnegl r6,r6 ! 670: 0: ! 671: rsb ! 672: # ! 673: # sysin - read input record ! 674: # ! 675: .globl sysin ! 676: sysin: ! 677: pushr $mr235 ! 678: pushl fciob(r6) # -> ioblk ! 679: calls $1,_osopen # call to open file ! 680: tstl r0 # if open unsuccessful then ! 681: jnequ erxit3 # take error exit ! 682: pushl r9 # -> scblk ! 683: pushl fciob(r6) # -> ioblk ! 684: pushl fcrsz(r6) # push record length ! 685: bgtr 0f ! 686: mnegl (sp),(sp) # if negative then make it positive ! 687: 0: pushl fcrsz(r6) # i/o mode - raw or line ! 688: calls $4,_osread # call to do read ! 689: cmpl r0,$-1 # check for eof or input error ! 690: jeql erxit1 # take eof exit ! 691: jlss erxit2 # take error exit ! 692: movl r0,sclen(r9) # set record length ! 693: popr $mr235 ! 694: addl2 $12,(sp) ! 695: rsb ! 696: # ! 697: # sysio ! 698: # ! 699: .globl sysio ! 700: sysio: ! 701: pushr $mr235 ! 702: bitl $IO_ILL,tioblk+ioflg ! 703: jnequ erxit2 # if illegal then take error exit ! 704: movl r6,fcblkptr # copy fcblk pointer for exit ! 705: # ! 706: # fill in fcblk. ! 707: # ! 708: tstl tioblk+iotyp # if no new fcb to build then ! 709: jeqlu iodon # done ! 710: movl $fcsize,fclen(r6) ! 711: movl tioblk+iolen,fcrsz(r6) ! 712: movl ioblkptr,fciob(r6) ! 713: jnequ iodon ! 714: movab fcsize(r6),fciob(r6) ! 715: # ! 716: # fill in ioblk. ! 717: # ! 718: movab fcsize(r6),r6 # -> ioblk ! 719: movl $b$xrt,(r6) ! 720: movl $iosize,iolen(r6) ! 721: movl r9,iofnm(r6) ! 722: clrl iopid(r6) ! 723: movab iosize(r6),iobuf(r6) ! 724: movl tioblk+iofdn,iofdn(r6) ! 725: movl tioblk+ioflg,ioflg(r6) ! 726: # ! 727: # if -f0 or -f1 specified then ! 728: # ! 729: # for -f0 ensure that buffer is same as osint's ! 730: # ! 731: # for -f1 no buffering should be done ! 732: # ! 733: bitl $IO_SYS,ioflg(r6) ! 734: beqlu 9f ! 735: cmpl $1,iofdn(r6) ! 736: blssu 9f ! 737: beqlu 1f ! 738: movl $inpbf,iobuf(r6) ! 739: jbr 9f ! 740: 1: clrl iobuf(r6) ! 741: bisl2 $IO_WRC,ioflg(r6) ! 742: 9: ! 743: # ! 744: # fill in bfblk ! 745: # ! 746: movab iosize(r6),r6 # -> bfblk ! 747: movl $b$xnt,(r6) ! 748: movl bfblksiz,bflen(r6) ! 749: movl tioblk+iopid,bfsiz(r6) ! 750: clrl bfrem(r6) ! 751: clrl bfoff(r6) ! 752: # ! 753: # try to open the file ! 754: # ! 755: movl fcblkptr,r0 ! 756: pushl fciob(r0) ! 757: calls $1,_osopen ! 758: tstl r0 ! 759: jneq erxit2 # if open failed, indicate error ! 760: # ! 761: iodon: movl fcblkptr,r10 ! 762: clrl r8 ! 763: popr $mr235 ! 764: addl2 $8,(sp) ! 765: rsb ! 766: # ! 767: # sysmm - get more memory ! 768: # ! 769: .globl sysmm ! 770: sysmm: ! 771: cmpl topmem,maxmem # if already at top of memory then ! 772: blssu 0f ! 773: clrl r9 # no more to be had ! 774: rsb ! 775: 0: # else {alloc some more} ! 776: pushr $mr235 ! 777: pushl meminb # size in bytes of memory request ! 778: calls $1,_sbrk # call to get memory ! 779: popr $mr235 ! 780: tstl r0 # if memory obtained then ! 781: blss 1f ! 782: addl2 meminb,topmem # adjust current top ! 783: movl meminc,r9 # set number of words in block ! 784: rsb # return ! 785: 1: clrl r9 # else nothing to get ! 786: rsb ! 787: # ! 788: # sysmx - get maximum size of created objects ! 789: # ! 790: .globl sysmx ! 791: sysmx: ! 792: mull3 $4,maxsiz,r6 ! 793: rsb ! 794: # ! 795: # sysou - output record ! 796: # ! 797: .globl sysou ! 798: sysou: ! 799: pushr $mr235 ! 800: pushl fciob(r6) # -> ioblk ! 801: calls $1,_osopen # call to do open ! 802: tstl r0 # if open error then ! 803: jnequ erxit1 # take error exit ! 804: pushl r9 # -> scblk ! 805: pushl fciob(r6) # -> ioblk ! 806: pushl sclen(r9) # record length ! 807: pushl fcrsz(r6) # i/o mode - raw or line ! 808: calls $4,_oswrite # call to do write ! 809: tstl r0 # if output error, ! 810: jneq erxit2 # take error exit ! 811: popr $mr235 ! 812: addl2 $8,(sp) ! 813: rsb ! 814: # ! 815: # syspi - print on interactive channel (terminal) ! 816: # ! 817: .globl syspi ! 818: syspi: ! 819: movl $ttyiob,r11 ! 820: jbr piprt ! 821: # ! 822: # syspp - return print parameters ! 823: # ! 824: .globl syspp ! 825: syspp: ! 826: movl pagwid,r6 ! 827: movl lnsppg,r7 ! 828: movl sptflg,r8 ! 829: movl defcas,kvcas ! 830: rsb ! 831: # ! 832: # syspr - print on standard output ! 833: # ! 834: .globl syspr ! 835: syspr: ! 836: movl $oupiob,r11 ! 837: # ! 838: # handle both syspi and syspr here. ! 839: # ! 840: piprt: ! 841: pushr $mr235 ! 842: bisl2 $IO_WRC,ioflg(r11) # briefly set no buffering ! 843: pushl r9 # -> scblk ! 844: pushl r11 # -> ioblk ! 845: pushl r6 # number characters ! 846: pushl $1 # line mode ! 847: calls $4,_oswrite # call to do write ! 848: bicl2 $IO_WRC,ioflg(r11) # back to buffering ! 849: tstl r0 # if output error then ! 850: jneq erxit1 # indicate error return ! 851: popr $mr235 ! 852: addl2 $4,(sp) ! 853: rsb ! 854: # ! 855: # sysrd - read from standard input ! 856: # ! 857: .globl sysrd ! 858: sysrd: ! 859: pushr $mr235 ! 860: movl $inpiob,ioblkptr ! 861: # ! 862: # handle both sysrd and sysri here. ! 863: # ! 864: rdmrg: ! 865: pushl r9 # -> scblk ! 866: pushl ioblkptr # -> ioblk ! 867: pushl r8 # read length ! 868: pushl r8 # line mode ! 869: calls $4,_osread # call to do read ! 870: cmpl r0,$-1 # check for eof or input error ! 871: jeql rdeof # take eof exit ! 872: jlss erxit1 # take error exit ! 873: movl r0,sclen(r9) # set read length ! 874: # ! 875: # check for 1st record of standard input coming from a file specified ! 876: # on the command line. if all of these conditions are true, allow ! 877: # the program to access any arguments following the file name. ! 878: # ! 879: tstl rdrec1 # if already ready record 1 then ! 880: bnequ rdskp # skip ! 881: cmpl $inpiob,ioblkptr ! 882: bnequ rdskp # if sysri entry then skip ! 883: incl rdrec1 # indicate read 1st record from std input ! 884: tstl inpptr # if not file from command line then ! 885: beqlu rdskp # skip ! 886: cmpb $'#,scstr(r9) # if 1st char not # then ! 887: bnequ rdskp # skip ! 888: cmpb $'!,scstr+1(r9) # if 2nd char not ! then ! 889: bnequ rdskp # skip ! 890: subl3 inpcnt,argc,cmdcnt ! 891: incl cmdcnt # compute # args after filename ! 892: movl $1,inpcnt # reset input count ! 893: brb rdmrg # ignore 1st record and try again ! 894: rdskp: ! 895: popr $mr235 ! 896: addl2 $4,(sp) ! 897: rsb ! 898: # ! 899: # come here to handle eof for both sysrd and sysri. if eof ! 900: # is for sysrd, standard input, switch to next input file ! 901: # if one exists. ! 902: # ! 903: rdeof: movl ioblkptr,r4 # -> ioblk ! 904: tstl iofdn(r4) # if not file descriptor 0 then ! 905: jnequ erxit1 # real eof ! 906: pushl inpptr # push -> array of pointers ! 907: pushl inpcnt # push size of areray ! 908: calls $2,_swcinp # call to switch input files ! 909: tstl r0 # if more to read then ! 910: jeqlu rdmrg # read it ! 911: jmp erxit1 # else signal eof ! 912: # ! 913: # sysri - read from interactive channel (terminal) ! 914: # ! 915: .globl sysri ! 916: sysri: ! 917: pushr $mr235 ! 918: movl $ttyiob,ioblkptr ! 919: jbr rdmrg ! 920: # ! 921: # sysrw - rewind file ! 922: # ! 923: .globl sysrw ! 924: sysrw: ! 925: pushr $mr235 ! 926: pushl fciob(r6) # -> ioblk ! 927: calls $1,_osopen # call to do open ! 928: tstl r0 # if open error then ! 929: jnequ erxit1 # take error exit ! 930: movl fciob(r6),r1 # -> ioblk ! 931: bitl $IO_PIP,ioflg(r1) ! 932: jnequ erxit2 # if pipe then rewind not allowed ! 933: cmpl iofdn(r1),$2 # if fd < 2 then ! 934: jlssu erxit2 # rewind not allowed ! 935: pushl $0 # whence ! 936: pushl $0 # offset ! 937: pushl fciob(r6) # -> ioblk ! 938: calls $3,_doset # call to do set ! 939: popr $mr235 ! 940: addl2 $12,(sp) ! 941: rsb ! 942: # ! 943: # sysst - set file pointer ! 944: # ! 945: .globl sysst ! 946: sysst: ! 947: pushr $mr235 ! 948: pushl fciob(r6) # -> ioblk ! 949: calls $1,_osopen # call to do open ! 950: tstl r0 # if file open error then ! 951: jnequ erxit3 # return error ! 952: # ! 953: movl fciob(r6),r1 # -> ioblk ! 954: bitl $IO_PIP,ioflg(r1) ! 955: jnequ erxit4 # if pipe then set not allowed ! 956: cmpl iofdn(r1),$2 # if fd < 2 then ! 957: jlssu erxit4 # set not allowed ! 958: # ! 959: cmpl $b$icl,(r7) # if already integer then ! 960: bnequ 0f ! 961: movl icval(r7),temp1 # grab value ! 962: brb 1f ! 963: 0: cmpl $b$scl,(r7) # else if not a string then ! 964: jnequ erxit1 # error ! 965: clrl temp3 # clear scnint character count ! 966: pushl $temp3 # -> temp3 ! 967: pushl sclen(r7) # string length ! 968: pushab scstr(r7) # -> string ! 969: calls $3,_scnint # call to scan integer ! 970: movl r0,temp1 # and save ! 971: 1: ! 972: # ! 973: cmpl $b$icl,(r8) # if already integer then ! 974: bnequ 0f ! 975: movl icval(r8),temp2 # grab value ! 976: brb 1f ! 977: 0: cmpl $b$scl,(r8) # else if not a string then ! 978: jnequ erxit1 # error ! 979: clrl temp3 # clear scnint character count ! 980: pushl $temp3 # -> temp3 ! 981: pushl sclen(r8) # string length ! 982: pushab scstr(r8) # -> string ! 983: calls $3,_scnint # call to scan integer ! 984: movl r0,temp2 # and save ! 985: 1: ! 986: # ! 987: pushl temp2 # whence ! 988: pushl temp1 # offset ! 989: pushl fciob(r6) # -> ioblk ! 990: calls $3,_doset # call to do set ! 991: popr $mr235 ! 992: addl2 $20,(sp) ! 993: rsb ! 994: # ! 995: # systm - get execution time so far ! 996: # ! 997: .globl systm ! 998: systm: ! 999: pushr $mr2+mr3 ! 1000: movl $tscblk+8,-(sp) # -> times buffer ! 1001: calls $1,_times # call to do times ! 1002: movl tscblk+8,r5 # get user time in 60ths ! 1003: mull2 $100,r5 # mulitply by 100 to get 6000ths ! 1004: divl2 $6,r5 # divide by 6 to get 1000ths ! 1005: popr $mr2+mr3 ! 1006: rsb ! 1007: # ! 1008: # sysxi - exit from executing program ! 1009: # ! 1010: .globl sysxi ! 1011: sysxi: ! 1012: tstl r10 # if 0 instead of scblk then ! 1013: jeqlu xilmod # try to write load module ! 1014: pushr $mr235 ! 1015: cmpl $b$scl,(r10) # if not scblk then ! 1016: jnequ erxit1 # error ! 1017: pushl r10 # push scblk pointer ! 1018: calls $1,_doexec # go do exit ! 1019: jmp erxit2 # should never return ! 1020: # ! 1021: # write load module ! 1022: # ! 1023: xilmod: tstl r5 # if r5 <= 0 then ! 1024: bgtr 0f ! 1025: pushr $mr235 # save regs for error exits ! 1026: jbr erxit1 # and take error exit ! 1027: 0: pushr $cmpreg # else save all compiler regs ! 1028: # ! 1029: # need to save stack contents, so that when load module is ! 1030: # invoked, stack can be recreated. ! 1031: # ! 1032: subl3 sp,initsp,r0 # compute depth of stack ! 1033: cmpl r0,tscblk # if stack won't fit in tscblk then ! 1034: jgtru xi2big # big trouble ! 1035: movl sp,r0 # -> into real stack ! 1036: movab tscblk+scstr,r1 # -> save stack area ! 1037: 1: movl (r0)+,(r1)+ # copy word of stack ... ! 1038: cmpl r0,initsp # until hit top word ! 1039: blssu 1b ! 1040: movl r1,lmodstk # set top of saved stack ! 1041: # ! 1042: # before creating the load module, we must relativize the ! 1043: # compiler cells that point into the stack. We do this by ! 1044: # temporarily negating initsp, calling streloc, and then ! 1045: # restoring initsp. After the load module has been written, ! 1046: # another call to streloc will restore the stack pointers. ! 1047: # ! 1048: mnegl initsp,initsp # negate initsp so streloc will subtract ! 1049: jsb streloc # relativize the compiler cells ! 1050: mnegl initsp,initsp # restore initsp to its previous value ! 1051: # ! 1052: # create a.out header in hststr scblk. ! 1053: # ! 1054: addl3 $1023,dnamp,r1 # round current memory in use ! 1055: bicl3 $0x3ff,r1,-(sp) # to a multiple of the page size ! 1056: movab hststr+scstr,r0 # -> a.out header block ! 1057: pushl r0 # which will be the other argument ! 1058: movl $0413,(r0)+ # set magic number ! 1059: bicl3 $0x3ff,$_etext,r1 # get text size, rounded down ! 1060: movl r1,(r0)+ # and place it in a.out header ! 1061: subl3 r1,4(sp),(r0)+ # data size = total - text size ! 1062: clrl (r0)+ # we will use no bss ! 1063: clrl (r0)+ ! 1064: clrl (r0)+ # set starting address ! 1065: clrl (r0)+ ! 1066: clrl (r0)+ ! 1067: # ! 1068: # call a workhorse c routine to actually write a.out file. ! 1069: # the amount of memory to write has already been pushed. ! 1070: # ! 1071: calls $2,_wrtaout # call to write a.out ! 1072: # ! 1073: # restore compiler cells to their previous values ! 1074: # ! 1075: jsb streloc # unrelativize stack pointers ! 1076: # ! 1077: tstl r0 # if error creating a.out then ! 1078: blss xi2big # return error ! 1079: # ! 1080: # pop registers and set up call to sysej ! 1081: # ! 1082: popr $cmpreg # restore all registers ! 1083: movl r7,r10 # -> chain of fcbs ! 1084: clrl r7 # set &CODE = 0 ! 1085: jsb sysej # call to end run ! 1086: # ! 1087: # if stack too big ! 1088: # ! 1089: xi2big: popr $cmpreg # restore all regs ! 1090: pushr $mr235 # push correct regs ! 1091: jbr erxit2 # take error exit ! 1092: # ! 1093: # error/ppm exits - pick up n-th word following jsb and return ! 1094: # to address contained in that word. ! 1095: # ! 1096: erxit1: ! 1097: popr $mr235 ! 1098: movl (sp)+,r11 ! 1099: jmp *(r11)+ ! 1100: # ! 1101: erxit2: ! 1102: popr $mr235 ! 1103: addl3 $4,(sp)+,r11 ! 1104: jmp *(r11)+ ! 1105: # ! 1106: erxit3: ! 1107: popr $mr235 ! 1108: addl3 $8,(sp)+,r11 ! 1109: jmp *(r11)+ ! 1110: # ! 1111: erxit4: ! 1112: popr $mr235 ! 1113: addl3 $12,(sp)+,r11 ! 1114: jmp *(r11)+ ! 1115: # ! 1116: erxit5: ! 1117: popr $mr235 ! 1118: addl3 $16,(sp)+,r11 ! 1119: jmp *(r11)+ ! 1120: # ! 1121: erxit6: ! 1122: popr $mr235 ! 1123: addl3 $20,(sp)+,r11 ! 1124: jmp *(r11)+ ! 1125: # ! 1126: # streloc - relocate stack pointers. this routine adds ! 1127: # initsp to every cell whose address appears in strellst. ! 1128: # ! 1129: streloc: ! 1130: pushr $mr0+mr1 ! 1131: moval strellst,r1 # start of list of thing to relocate ! 1132: jbr strel1 # jump into the loop ! 1133: strel0: addl2 initsp,(r0) # relocate a pointer ! 1134: strel1: movl (r1)+,r0 # fetch a pointer to a cell ! 1135: jneq strel0 # if zero, we're done ! 1136: popr $mr0+mr1 ! 1137: rsb ! 1138: # ! 1139: # option routines ! 1140: # ! 1141: # optclr clears a flag ! 1142: # opterr signals an error ! 1143: # optfld sets defcas to 0 for no folding ! 1144: # optnum get numeric value ! 1145: # optset set option value ! 1146: # ! 1147: # optclr ! 1148: # ! 1149: optclr: bicl2 optflg(r1),sptflg ! 1150: rsb ! 1151: # ! 1152: # opterr ! 1153: # ! 1154: opterr: pushr $mr0+mr1+mr2+mr3+mr4+mr5 ! 1155: pushl $6 ! 1156: pushl $curopt ! 1157: pushl $2 ! 1158: calls $3,_write ! 1159: popr $mr0+mr1+mr2+mr3+mr4+mr5 ! 1160: rsb ! 1161: # ! 1162: # optinp ! 1163: # ! 1164: optinp: tstl inpptr # if already processed input filenames then ! 1165: bnequ opterr # error ! 1166: subl3 $4,r6,inpptr # -> first input filename ! 1167: movl r4,inpcnt # set number of filenames ! 1168: movl $1,r4 # done scanning options ! 1169: rsb # return ! 1170: # ! 1171: # optfld ! 1172: # ! 1173: optfld: clrl defcas ! 1174: rsb ! 1175: # ! 1176: # optnum ! 1177: # ! 1178: optnum: pushl r0 # -> number ! 1179: jsb getnum # get number ! 1180: movl (sp)+,r0 # -> byte past last digit ! 1181: movzbl (r0),r2 # get byte past last digit ! 1182: bisb2 $040,r2 # fold to lower case ! 1183: cmpb $ch$lk,r2 # if number followed by k then ! 1184: bnequ 0f ! 1185: mull2 $1024,r5 # mulitply by 1024 ! 1186: incl r0 # skip over k ! 1187: 0: tstl r5 # if number zero or negative ! 1188: bleq opterr # treat as error ! 1189: movl r5,*optflg(r1) # store option ! 1190: rsb # return ! 1191: # ! 1192: # optoup ! 1193: # ! 1194: optoup: cmpl $2,r4 # if no option after -o then ! 1195: bgtru opterr # error ! 1196: movl (r6),r1 # -> output filename ! 1197: cmpb $ch$mn,(r1) # if filename starts with - then ! 1198: beqlu opterr # error ! 1199: movl (r6)+,oupptr # save pointer to output filename ! 1200: decl r4 # one less option to process ! 1201: rsb # return ! 1202: # ! 1203: # optset ! 1204: # ! 1205: optset: bisl2 optflg(r1),sptflg ! 1206: rsb ! 1207: # ! 1208: # optusr ! 1209: # ! 1210: optusr: cmpl $2,r4 # if fewer than 2 options then ! 1211: jgtru opterr # can't have argument ! 1212: movl (r6)+,uarg # save -> argument ! 1213: decl r4 # dec number of remaining options ! 1214: rsb ! 1215: # ! 1216: # getnum ! 1217: # ! 1218: # (sp) -> string to convert ! 1219: # jsb getnum ! 1220: # (sp) -> char after last digit ! 1221: # (r5) converted number ! 1222: # ! 1223: getnum: ! 1224: movl 4(sp),r7 # -> string ! 1225: clrl r5 # clear accumulator ! 1226: 0: cmpb $060,(r7) # if not a decimal digit then ! 1227: bgtru 1f # done with conversion ! 1228: cmpb $071,(r7) # ! 1229: blssu 1f ! 1230: movzbl (r7)+,r8 # load digit ! 1231: subl2 $060,r8 # remove unnecessary bits ! 1232: mull2 $10,r5 # accum * 10 ! 1233: addl2 r8,r5 # add in this digit ! 1234: brb 0b ! 1235: 1: movl r7,4(sp) # return address of next byte ! 1236: rsb # return ! 1237: # ! 1238: # interface data area ! 1239: # ------------------- ! 1240: # ! 1241: .data 1 ! 1242: # ! 1243: # flags for compiler ! 1244: # ! 1245: .set errors,1 # send errors to terminal ! 1246: .set prtich,2 # standard printer is terminal ! 1247: .set nolist,4 # suppress compilation listing ! 1248: .set nocmps,8 # suppress compilation statistics ! 1249: .set noexcs,16 # suppress execution statistics ! 1250: .set lnglst,32 # generate page ejects ! 1251: .set noexec,64 # suppress program execution ! 1252: .set trmnal,128 # terminal i/o association ! 1253: .set stdlst,256 # standard listing (intermediate) ! 1254: .set nohedr,512 # suppress sysid header ! 1255: # ! 1256: .set deflag,errors+nolist+nocmps+noexcs+trmnal+nohedr ! 1257: # ! 1258: # option table ! 1259: # ! 1260: .set opttxt,0 # option characters ! 1261: .set optflg,4 # option flag - flags or address ! 1262: .set optrtn,8 # -> option processing routine ! 1263: .set optsiz,12 # size in bytes of entry ! 1264: # ! 1265: opttbl: ! 1266: .ascii "-f " ! 1267: .long 0,optfld ! 1268: # ! 1269: .ascii "-e " ! 1270: .long errors,optclr ! 1271: # ! 1272: .ascii "-l " ! 1273: .long nolist,optclr ! 1274: # ! 1275: .ascii "-c " ! 1276: .long nocmps,optclr ! 1277: # ! 1278: .ascii "-x " ! 1279: .long noexcs,optclr ! 1280: # ! 1281: .ascii "-a " ! 1282: .long nolist+nocmps+noexcs,optclr ! 1283: # ! 1284: .ascii "-p " ! 1285: .long lnglst,optset ! 1286: # ! 1287: .ascii "-z " ! 1288: .long stdlst,optset ! 1289: # ! 1290: .ascii "-h " ! 1291: .long nohedr,optclr ! 1292: # ! 1293: .ascii "-n " ! 1294: .long noexec,optset ! 1295: # ! 1296: .ascii "-m " ! 1297: .long maxsiz,optnum ! 1298: # ! 1299: .ascii "-s " ! 1300: .long stksiz,optnum ! 1301: # ! 1302: .ascii "-d " ! 1303: .long datwds,optnum ! 1304: # ! 1305: .ascii "-i " ! 1306: .long meminc,optnum ! 1307: # ! 1308: .ascii "-o " ! 1309: .long 0,optoup ! 1310: # ! 1311: .ascii "-u " ! 1312: .long 0,optusr ! 1313: # ! 1314: curopt: .ascii "- " ! 1315: .ascii "?\n " ! 1316: .long opterr ! 1317: .align 2 ! 1318: # ! 1319: # standard input/output pointers ! 1320: # ! 1321: inpcnt: .long 0 ! 1322: inpptr: .long 0 ! 1323: oupptr: .long 0 ! 1324: # ! 1325: # pointer to -u arg ! 1326: # ! 1327: uarg: .long 0 ! 1328: # ! 1329: # save argc and argv from initial call ! 1330: # ! 1331: argc: .long 0 ! 1332: argv: .long 0 ! 1333: # ! 1334: # #! data areas ! 1335: # ! 1336: cmdcnt: .long 0 # number of command args ! 1337: rdrec1: .long 0 # read record 1 from std in flag ! 1338: # ! 1339: # standard ioblks ! 1340: # ! 1341: inpiob: .space iobuf ! 1342: .long inpbf # -> input bfblk ! 1343: .long 0 # file descriptor ! 1344: .long IO_INP|IO_OPN|IO_SYS ! 1345: # ! 1346: inpbf: .space bfsiz ! 1347: .long 1024 # buffer size ! 1348: .long 0 # remaining chars to read ! 1349: .long 0 # offset to next character to read ! 1350: .space 1024 # buffer ! 1351: # ! 1352: # ! 1353: oupiob: .space iobuf ! 1354: .long 0 # no buffer ! 1355: .long 1 # file descriptor number ! 1356: .long IO_OUP|IO_OPN|IO_SYS ! 1357: # ! 1358: # ! 1359: ttyiob: .space iobuf ! 1360: .long ttybf # -> tty buffer input ! 1361: .long 2 # file descriptor number ! 1362: .long IO_INP|IO_OUP|IO_OPN|IO_SYS ! 1363: # ! 1364: ttybf: .space bfsiz ! 1365: .long 258 # buffer size ! 1366: .long 0 # remaining chars to read ! 1367: .long 0 # offset to next char to read ! 1368: .space 258 # buffer ! 1369: .align 2 ! 1370: # ! 1371: .globl _rzfcb ! 1372: _rzfcb: .long 0 ! 1373: # ! 1374: fildes: .long 0 ! 1375: pr_len: .long 0 ! 1376: rd_len: .long 0 ! 1377: lenfname: .long 0 ! 1378: ioblkptr: .long 0 ! 1379: bfblkptr: .long 0 ! 1380: bfblksiz: .long 0 ! 1381: fcblkptr: .long 0 ! 1382: tioblk: .space iosize ! 1383: # ! 1384: # memory allocation variables ! 1385: # ! 1386: meminc: .long 4*k # increment in words for sbrk ! 1387: meminb: .long 0 # meminc * 4 (to get bytes) ! 1388: datwds: .long 256*k # max size in words of dynamic area ! 1389: basmem: .long 0 # base of dynamic memory ! 1390: topmem: .long 0 # current top of dynamic memory ! 1391: maxmem: .long 0 # maximum top of dynamic memory ! 1392: maxsiz: .long 8*k # maximum object size in words ! 1393: stksiz: .long 2*k # stack size in words ! 1394: initsp: .long 0 # initial value of sp on entry to sec04 ! 1395: lowsp: .long 0 # lowest legal sp value ! 1396: # ! 1397: # default value for &case ! 1398: # ! 1399: defcas: .long 1 ! 1400: # ! 1401: # values given to syspp for print parameters ! 1402: # ! 1403: lnsppg: .long 60 # lines per page ! 1404: pagwid: .long 120 # page width ! 1405: sptflg: .long deflag # flags ! 1406: # ! 1407: # flag that indicates that this is a load module. also, serves ! 1408: # the dual purpose of indicating size of saved stack. ! 1409: # ! 1410: lmodstk: .long 0 ! 1411: # ! 1412: temp1: .long 0 ! 1413: temp2: .long 0 ! 1414: temp3: .long 0 ! 1415: # ! 1416: nulstr: .long 0,0 ! 1417: # ! 1418: tscblk: .long 512,0 ! 1419: .space 512 ! 1420: # ! 1421: hststr: .long 128,0 ! 1422: .space 128 ! 1423: # ! 1424: id1: .long 0,id1l ! 1425: .ascii "(0.0)" ! 1426: id1e: ! 1427: .set id1l,id1e-id1-8 ! 1428: .align 2 ! 1429: # ! 1430: id2: .long 0,id2l ! 1431: .ascii "VAX/UNIX Version" ! 1432: id2e: ! 1433: .set id2l,id2e-id2-8 ! 1434: .align 2 ! 1435: # ! 1436: ffscb: .long 0,1 ! 1437: ffstr: .byte 12 ! 1438: # ! 1439: nlstr: .ascii "\n" ! 1440: .align 2 ! 1441: # ! 1442: errfdn: .long 0 ! 1443: # ! 1444: # The following pointers address those cells in the compiler ! 1445: # that point into the stack when a load module might be written, ! 1446: # and which must therefore be relocated. ! 1447: strellst: ! 1448: .long flptr ! 1449: .long stbas ! 1450: .long gtcef ! 1451: .long 0 # end of list marker
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