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1.1 ! root 1: # ! 2: # Copyright (c) 1979 Regents of the University of California ! 3: # ! 4: # char sccsid[] = "@(#)34err.s 4.1 10/10/80"; ! 5: # ! 6: .set EARGV ,1 ! 7: .set EASRT ,2 ! 8: .set EASSIGN ,3 ! 9: .set EBADFNUM ,4 ! 10: .set EBADINUM ,5 ! 11: .set EBADOP ,6 ! 12: .set EBUILTIN ,7 ! 13: .set ECASE ,8 ! 14: .set ECHR ,9 ! 15: .set ECLOSE,10 ! 16: .set ECREATE,11 ! 17: .set EFIXADD,13 ! 18: .set EFIXDIV,14 ! 19: .set EFIXMUL,15 ! 20: .set EFIXNEG,16 ! 21: .set EFIXSUB,17 ! 22: .set EFLTADD,18 ! 23: .set EFLTDIV,19 ! 24: .set EFLTMUL,20 ! 25: .set EFLTSUB,21 ! 26: .set EFMTSIZE,22 ! 27: .set EGOTO,23 ! 28: .set EHALT,24 ! 29: .set EINTR,25 ! 30: .set ELLIMIT,26 ! 31: .set ELN,27 ! 32: .set EMODDIV,28 ! 33: .set ENAMESIZE,29 ! 34: .set ENAMRNG,30 ! 35: .set ENILPTR,31 ! 36: .set ENUMNTFD,32 ! 37: .set EOPEN,33 ! 38: .set EOUTOFMEM,34 ! 39: .set EPACK,35 ! 40: .set EPASTEOF,36 ! 41: .set ERANGE,37 ! 42: .set EREADIT,38 ! 43: .set EREFINAF,39 ! 44: .set EREMOVE,40 ! 45: .set ESEEK,41 ! 46: .set ESQRT,42 ! 47: .set ESTKNEMP,43 ! 48: .set ESTKOVFLO,44 ! 49: .set ESTLIM,45 ! 50: .set ESUBSCR,46 ! 51: .set ESYSTEM,47 ! 52: .set ETRASHHEAP,48 ! 53: .set EUNPACK,49 ! 54: .set EWRITE,50 ! 55: .set EWRITEIT,51 ! 56: .set ECTLWR,12 ! 57: .set ECTUPR,52 ! 58: .set ECTSNG,53 ! 59: .set ENARGS,54 ! 60: # ! 61: # Fielding interrupts and processing errors ! 62: # ! 63: # Process interpreter detected errors ! 64: # ! 65: error: ! 66: movzwl _perrno,-(sp) ! 67: calls $1,_error ! 68: jmp (r8) ! 69: ! 70: _endinterpret: ! 71: .byte 'e,'n,'d, 0 ! 72: ! 73: # ! 74: # Keyboard interrupts ! 75: # ! 76: .align 1 ! 77: .globl _intr ! 78: _intr: ! 79: .word 0 ! 80: pushal _intr #reset interrupt signal ! 81: pushl $SIGINT ! 82: calls $2,_signal ! 83: pushl $EINTR ! 84: calls $1,_error ! 85: ret ! 86: # ! 87: # Segmentation Violations => No more memory available for the stack ! 88: # ! 89: .align 1 ! 90: .globl _memsize ! 91: _memsize: ! 92: .word 0 ! 93: pushl $ESTKOVFLO ! 94: calls $1,_error ! 95: ret ! 96: # ! 97: # Die gracefully on unexpected signals ! 98: # ! 99: .align 1 ! 100: .globl _syserr ! 101: _syserr: ! 102: .word 0 ! 103: pushl $ESYSTEM ! 104: calls $1,_error ! 105: ret ! 106: # ! 107: # Process computational errors ! 108: # ! 109: .align 1 ! 110: .globl _except ! 111: _except: ! 112: .word 0 ! 113: pushal _except #reset signal ! 114: pushl $SIGFPE ! 115: calls $2,_signal ! 116: movl 16(ap),r0 #r0 has PC at point following error ! 117: moval errtbl-4,r1 #r1 points to error offset table ! 118: l3404: ! 119: addl2 $4,r1 #determine cause of error ! 120: cmpl r0,(r1)+ ! 121: blssu l3405 #not in table => system error ! 122: cmpl r0,(r1)+ ! 123: bgtru l3404 ! 124: movzwl (r1),-(sp) #select error message ! 125: brb l3406 ! 126: l3405: ! 127: pushl $ESYSTEM ! 128: l3406: ! 129: calls $1,_error ! 130: ret ! 131: # ! 132: # Table of offsets and their associated errors ! 133: # ! 134: .align 1 ! 135: errtbl: ! 136: .long _AS2, _OFF, EASSIGN ! 137: .long _ADD2, _ADD28, EFIXADD ! 138: .long _ADD28, _SUB2, EFLTADD ! 139: .long _SUB2, _SUB28, EFIXSUB ! 140: .long _SUB28, _MUL2, EFLTSUB ! 141: .long _MUL2, _MUL28, EFIXMUL ! 142: .long _MUL28, _DIV2, EFLTMUL ! 143: .long _DIV2, _MOD2, EFIXDIV ! 144: .long _MOD2, _ABS2, EMODDIV ! 145: .long _ABS2, _ABS8, EFIXNEG ! 146: .long _DVD2, _IND1, EFLTDIV ! 147: .long _STOI, _UNDEF, EBUILTIN ! 148: .long 0xffffffff ! 149: # ! 150: # recover values of dp and lino from the stack ! 151: # ! 152: .globl _fetchdp ! 153: ! 154: _fetchdp: ! 155: .word R2|R3|R4|R5|R6|R7|R8|R9|R10|R11 ! 156: pushl fp #sift through the stack to get the ! 157: movl sp,oldsp # values of dp and lino ! 158: l3401: ! 159: bicw3 $0xf000,MASK(fp),mask #register save mask ! 160: moval REGS(fp),sp #point to saved registers ! 161: popr mask #pop them ! 162: cmpl PC(fp),$_interpret #check for interpreter frame ! 163: blss l3402 #not found ! 164: cmpl PC(fp),$_endinterpret #check for end of interpreter ! 165: blss l3403 #found ! 166: l3402: ! 167: movl FP(fp),fp #get next frames registers ! 168: jbr l3401 ! 169: l3403: ! 170: movl oldsp,sp #restore current frame ! 171: movl (sp)+,fp ! 172: movl r9,*4(ap) #return dp ! 173: movl r11,*8(ap) #return lino ! 174: ret ! 175: .data ! 176: oldsp: .space 4 #old value of sp ! 177: mask: .space 2 #register pop mask ! 178: .text
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