projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| b202b2da CH |
1 | #\f |
| 2 | # 34err.s | |
| 3 | # | |
| 4 | .set ECHR,1 | |
| 5 | .set ESYSTEM,2 | |
| 6 | .set EBUILTIN,3 | |
| 7 | .set EHALT,4 | |
| 8 | .set ENILPTR,5 | |
| 9 | .set EPASTEOF,6 | |
| 10 | .set ESQRT,7 | |
| 11 | .set ESTKNEMP,8 | |
| 12 | .set ESUBSCR,9 | |
| 13 | .set EREFINAF,10 | |
| 14 | .set EWRITE,11 | |
| 15 | .set ENAMESIZE,12 | |
| 16 | .set ELN,13 | |
| 17 | .set EBADOP,14 | |
| 18 | .set EBADINUM,15 | |
| 19 | .set EGOTO,16 | |
| 20 | .set ECASE,17 | |
| 21 | .set ESEEK,18 | |
| 22 | .set ECREATE,19 | |
| 23 | .set EOUTOFMEM,20 | |
| 24 | .set ECTTOT,21 | |
| 25 | .set ESTLIM,22 | |
| 26 | .set ESTKOVFLO,23 | |
| 27 | .set EBADFNUM,24 | |
| 28 | .set EREMOVE,25 | |
| 29 | .set ECLOSE,26 | |
| 30 | .set EOPEN,27 | |
| 31 | .set EARGV,28 | |
| 32 | .set EPACK,29 | |
| 33 | .set EUNPACK,30 | |
| 34 | .set ERANGE,31 | |
| 35 | .set EASRT,32 | |
| 36 | .set EREADIT,33 | |
| 37 | .set EWRITEIT,34 | |
| 38 | .set EINTR,35 | |
| 39 | .set EASSIGN,36 | |
| 40 | .set EFIXADD,37 | |
| 41 | .set EFLTADD,38 | |
| 42 | .set EFIXSUB,39 | |
| 43 | .set EFLTSUB,40 | |
| 44 | .set EFIXMUL,41 | |
| 45 | .set EFLTMUL,42 | |
| 46 | .set EFIXDIV,43 | |
| 47 | .set EFLTDIV,44 | |
| 48 | .set EMODDIV,45 | |
| 49 | .set EFIXNEG,46 | |
| 50 | .set ELLIMIT,47 | |
| 51 | .set EFRAMESIZE,48 | |
| 52 | .set ETRASHHEAP,49 | |
| 53 | # | |
| 54 | # Fielding interrupts and processing errors | |
| 55 | # | |
| 56 | # Process interpreter detected errors | |
| 57 | # | |
| 58 | error: | |
| 59 | movzwl _perrno,-(sp) | |
| 60 | calls $1,_error | |
| 61 | jmp (r8) | |
| 62 | ||
| 63 | _endinterpret: | |
| 64 | .byte 'e,'n,'d, 0 | |
| 65 | ||
| 66 | # | |
| 67 | # Keyboard interrupts | |
| 68 | # | |
| 69 | .align 1 | |
| 70 | .globl _intr | |
| 71 | _intr: | |
| 72 | .word 0 | |
| 73 | pushal _intr #reset interrupt signal | |
| 74 | pushl $SIGINT | |
| 75 | calls $2,_signal | |
| 76 | pushl $EINTR | |
| 77 | calls $1,_error | |
| 78 | ret | |
| 79 | # | |
| 80 | # Segmentation Violations => No more memory available for the stack | |
| 81 | # | |
| 82 | .align 1 | |
| 83 | .globl _memsize | |
| 84 | _memsize: | |
| 85 | .word 0 | |
| 86 | pushl $ESTKOVFLO | |
| 87 | calls $1,_error | |
| 88 | ret | |
| 89 | # | |
| 90 | # Process computational errors | |
| 91 | # | |
| 92 | .align 1 | |
| 93 | .globl _except | |
| 94 | _except: | |
| 95 | .word 0 | |
| 96 | pushal _except #reset signal | |
| 97 | pushl $SIGFPE | |
| 98 | calls $2,_signal | |
| 99 | movl PC(fp),r0 #r0 has PC at point following error | |
| 100 | moval errtbl-4,r1 #r1 points to error offset table | |
| 101 | l3404: | |
| 102 | addl2 $4,r1 #determine cause of error | |
| 103 | cmpl r0,(r1)+ | |
| 104 | blssu l3405 #not in table => system error | |
| 105 | cmpl r0,(r1)+ | |
| 106 | bgtru l3404 | |
| 107 | movzwl (r1),-(sp) #select error message | |
| 108 | brb l3406 | |
| 109 | l3405: | |
| 110 | pushl $ESYSTEM | |
| 111 | l3406: | |
| 112 | calls $1,_error | |
| 113 | ret | |
| 114 | # | |
| 115 | # Table of offsets and their associated errors | |
| 116 | # | |
| 117 | .align 1 | |
| 118 | errtbl: | |
| 119 | .long _AS2, _OFF, EASSIGN | |
| 120 | .long _INX2, _NIL, ESUBSCR | |
| 121 | .long _ADD2, _ADD28, EFIXADD | |
| 122 | .long _ADD28, _SUB2, EFLTADD | |
| 123 | .long _SUB2, _SUB28, EFIXSUB | |
| 124 | .long _SUB28, _SQR2, EFLTSUB | |
| 125 | .long _SQR2, _MUL28, EFIXMUL | |
| 126 | .long _MUL28, _DIV2, EFLTMUL | |
| 127 | .long _DIV2, _MOD2, EFIXDIV | |
| 128 | .long _MOD2, _ABS2, EMODDIV | |
| 129 | .long _ABS2, _ABS8, EFIXNEG | |
| 130 | .long _DVD2, _IND1, EFLTDIV | |
| 131 | .long _RANG2, _CASE1OP, ERANGE | |
| 132 | .long _STOI, _UNDEF, EBUILTIN | |
| 133 | .long _PACK, _UNPACK, EPACK | |
| 134 | .long _UNPACK, _GET, EUNPACK | |
| 135 | .long 0xffffffff | |
| 136 | # | |
| 137 | # recover values of dp and lino from the stack | |
| 138 | # | |
| 139 | .globl _fetchdp | |
| 140 | ||
| 141 | _fetchdp: | |
| 142 | .word R2|R3|R4|R5|R6|R7|R8|R9|R10|R11 | |
| 143 | pushl fp #sift through the stack to get the | |
| 144 | movl sp,oldsp # values of dp and lino | |
| 145 | l3401: | |
| 146 | bicw3 $0xf000,MASK(fp),mask #register save mask | |
| 147 | moval REGS(fp),sp #point to saved registers | |
| 148 | popr mask #pop them | |
| 149 | cmpl PC(fp),$_interpret #check for interpreter frame | |
| 150 | blss l3402 #not found | |
| 151 | cmpl PC(fp),$_endinterpret #check for end of interpreter | |
| 152 | blss l3403 #found | |
| 153 | l3402: | |
| 154 | movl FP(fp),fp #get next frames registers | |
| 155 | jbr l3401 | |
| 156 | l3403: | |
| 157 | movl oldsp,sp #restore current frame | |
| 158 | movl (sp)+,fp | |
| 159 | movl r9,*4(ap) #return dp | |
| 160 | movl r11,*8(ap) #return lino | |
| 161 | ret | |
| 162 | .data | |
| 163 | oldsp: .space 4 #old value of sp | |
| 164 | mask: .space 2 #register pop mask | |
| 165 | .text |