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BSD 3.0
# 00case.s # # Berkeley Pascal Assembler Kernel # .globl _interpret #normal interpreter entry point # # register definitions # # registers R0 - R6 are for scratch use # .set lino, r11 .set lc, r10 .set dp, r9 .set loop, r8 .set buf, r7 # # Global constants # .set R2,0x004 #register fields in call mask .set R3,0x008 .set R4,0x010 .set R5,0x020 .set R6,0x040 .set R7,0x080 .set R8,0x100 .set R9,0x200 .set R10,0x400 .set R11,0x800 .set SIGINT,2 #interrupt signal .set SIGFPE,8 #arithmetic exception signal .set SIGSEGV,11 #segmentation violation .set MASK,6 #offset of save mask in call stack .set FP,12 #offset of "fp" in call stack .set PC,16 #offset of "pc" in call stack .set REGS,20 #beginning of saved registers in call stack .set O_DATE,0346 #DATE opcode number .set O_TIME,0347 #TIME opcode number .set tempsize,-256 #maximum required temporary stack space .set HZ,60 #interrupt frequency # # program variables # .globl _display #runtime display .globl _addrsze #size of addresses .globl _file #current file name .globl _bufopt #standard output buffering option .globl _fchain #head of active file chain .globl _llimit #max number of output lines .globl _stcnt #number of stmts executed .globl _stlim #max number of stmts to exec .globl _nodump #1 => no postmortum dump .globl _perrno #interpreter error number .globl _profcnts #PX profile execution counts .globl _pxpbuf #ptr to pxp buffer .globl _pxpsize #size of pxp buffer .globl _argc #number of passed args .globl _argv #values of passed args .globl __iob #base of I/O buffer block # # system subroutines # .globl _signal .globl _time .globl _times # # system math routines # .globl _atan .globl _cos .globl _exp .globl _log .globl _sin .globl _sqrt .globl _srand .globl _rand # # pascal specific subroutines # .globl _error #error message routine .globl _palloc #heap allocator .globl _pfree .globl _pcttot #set constructor .globl _pdattim #getting date, time info .globl _perror #process pxp errors # # initializing the interpreter # _interpret: .word 0xffc #register save mask moval iloop,r8 tstl 8(ap) #check for profiling beql l0050 moval ploop,r8 #set profiling request l0050: callg *4(ap),l0051 #set ap to base of program ret l0051: .word 0 bispsw $0xe0 #enable overflow traps movl ap,r10 #program start address moval _display,r9 moval -4(sp),(r9) pushal stderr #set up global file variables movl sp,stderr+FLEV movl _llimit,stderr+LLIMIT pushal stdout movl sp,stdout+FLEV movl _llimit,stdout+LLIMIT pushal stdin movl sp,stdin+FLEV moval stdin,_fchain jmp (r8) #begin interpreter # # main interpreter loop # the instruction 'jmp (loop)' # transfers here # ploop: movzbl (r10),r0 incl _profcnts[r0] iloop: caseb (r10)+,$0,$255 optab: .word _ABORT-optab .word _HALT-optab .word _TRA4-optab .word _NODUMP-optab .word _BEG-optab .word _END-optab .word _CALL-optab .word _TRACNT-optab .word _PUSH-optab .word _POP-optab .word _INX4-optab .word _SDUP-optab .word _IF-optab .word _TRA-optab .word _LINO-optab .word _GOTO-optab .word _REL2-optab .word _REL4-optab .word _REL24-optab .word _REL42-optab .word _REL8-optab .word _RELG-optab .word _RELT-optab .word badop-optab .word _REL28-optab .word _REL48-optab .word _REL82-optab .word _REL84-optab .word _AND-optab .word _OR-optab .word _NOT-optab .word badop-optab .word _AS2-optab .word _AS4-optab .word _AS24-optab .word _AS42-optab .word _AS8-optab .word _INX2P2-optab .word _INX4P2-optab .word _AS-optab .word _AS21-optab .word _AS41-optab .word _AS28-optab .word _AS48-optab .word _OFF-optab .word _INX2-optab .word _NIL-optab .word _LV-optab .word _ADD2-optab .word _ADD4-optab .word _ADD24-optab .word _ADD42-optab .word _ADD28-optab .word _ADD48-optab .word _ADD82-optab .word _ADD84-optab .word _SUB2-optab .word _SUB4-optab .word _SUB24-optab .word _SUB42-optab .word _SUB28-optab .word _SUB48-optab .word _SUB82-optab .word _SUB84-optab .word _MUL2-optab .word _MUL4-optab .word _MUL24-optab .word _MUL42-optab .word _MUL28-optab .word _MUL48-optab .word _MUL82-optab .word _MUL84-optab .word _ABS2-optab .word _ABS4-optab .word _ABS8-optab .word badop-optab .word _ADD8-optab .word _SUB8-optab .word _MUL8-optab .word _DVD8-optab .word _DIV2-optab .word _DIV4-optab .word _DIV24-optab .word _DIV42-optab .word badop-optab .word badop-optab .word badop-optab .word badop-optab .word _MOD2-optab .word _MOD4-optab .word _MOD24-optab .word _MOD42-optab .word badop-optab .word badop-optab .word badop-optab .word badop-optab .word _NEG2-optab .word _NEG4-optab .word _NEG8-optab .word badop-optab .word badop-optab .word badop-optab .word badop-optab .word badop-optab .word badop-optab .word badop-optab .word badop-optab .word badop-optab .word badop-optab .word badop-optab .word badop-optab .word badop-optab .word _DVD2-optab .word _DVD4-optab .word _DVD24-optab .word _DVD42-optab .word _DVD28-optab .word _DVD48-optab .word _DVD82-optab .word _DVD84-optab .word _RV1-optab .word _RV2-optab .word _RV4-optab .word _RV8-optab .word _IND1-optab .word _IND2-optab .word _IND4-optab .word _IND8-optab .word _CON1-optab .word _CON2-optab .word _CON4-optab .word _CON8-optab .word _RV-optab .word _IND-optab .word _CON-optab .word badop-optab .word _RANG2-optab .word _RANG42-optab .word _RSNG2-optab .word _RSNG42-optab .word _RANG4-optab .word _RANG24-optab .word _RSNG4-optab .word _RSNG24-optab .word _WRITEF-optab .word _WRITEC-optab .word _WRITES-optab .word _WRITEB-optab .word badop-optab .word badop-optab .word badop-optab .word badop-optab .word _BLKBEG-optab .word _PUSH4-optab .word _POP4-optab .word badop-optab .word badop-optab .word badop-optab .word badop-optab .word badop-optab .word _CASE1OP-optab .word _CASE2OP-optab .word _CASE4OP-optab .word _PXPBUF-optab .word _COUNT-optab .word badop-optab .word badop-optab .word badop-optab .word _ADDT-optab .word _SUBT-optab .word _MULT-optab .word _INCT-optab .word _CTTOT-optab .word _CARD-optab .word _IN-optab .word _ASRT-optab .word _FOR1U-optab .word _FOR2U-optab .word _FOR4U-optab .word _FOR1D-optab .word _FOR2D-optab .word _FOR4D-optab .word _STLIM-optab .word _SCLCK-optab .word _STOI-optab .word _STOD-optab .word _ITOD-optab .word _ITOS-optab .word _BUFF-optab .word _WCLCK-optab .word _WRHEX2-optab .word _WRHEX4-optab .word _GET-optab .word _PUT-optab .word _MESSAGE-optab .word _FNIL-optab .word _EOF-optab .word _EOLN-optab .word _RESET-optab .word _REWRITE-optab .word _REMOVE-optab .word _READ4-optab .word _UNIT-optab .word _READC-optab .word _READ8-optab .word _UNITINP-optab .word _UNITOUT-optab .word _READLN-optab .word _WRIT2-optab .word _WRIT4-optab .word _WRITB-optab .word _WRITC-optab .word _WRIT8-optab .word _WRITG-optab .word _WRIT82-optab .word _WRITLN-optab .word _WROCT2-optab .word _WROCT4-optab .word _FLUSH-optab .word _PACK-optab .word _UNPACK-optab .word _LLIMIT-optab .word _ARGC-optab .word _ARGV-optab .word _CLCK-optab .word _SEED-optab .word _RANDOM-optab .word _DISPOSE-optab .word _NEW-optab .word _EXPO-optab .word _DATE-optab .word _TIME-optab .word _ATAN-optab .word _COS-optab .word _EXP-optab .word _LN-optab .word _SIN-optab .word _SQRT-optab .word _CHR2-optab .word _CHR4-optab .word _ODD2-optab .word _ODD4-optab .word _PRED2-optab .word _PRED4-optab .word _PRED24-optab .word _SUCC2-optab .word _SUCC4-optab .word _SUCC24-optab .word _DEFNAME-optab .word _PAGE-optab .word _UNDEF-optab .word _SQR2-optab .word _SQR4-optab .word _SQR8-optab .word _ROUND-optab .word _TRUNC-optab badop: incl r10 movw $EBADOP,_perrno jbr error
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