projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| a22cc832 JF |
1 | # C library -- reset, setexit |
| 2 | ||
| 3 | # reset(x) | |
| 4 | # will generate a "return" from | |
| 5 | # the last call to | |
| 6 | # setexit() | |
| 7 | # by restoring r6 - r12, ap, fp | |
| 8 | # and doing a return. | |
| 9 | # The returned value is x; on the original | |
| 10 | # call the returned value is 0. | |
| 11 | # | |
| 12 | # useful for going back to the main loop | |
| 13 | # after a horrible error in a lowlevel | |
| 14 | # routine. | |
| 15 | ||
| 16 | .globl _setexit | |
| 17 | .globl _getexit | |
| 18 | .globl _reset | |
| 19 | .globl _resexit | |
| 20 | .globl _setsav | |
| 21 | .globl _svkludg | |
| 22 | ||
| 23 | _setexit: | |
| 24 | .word 0x0000 | |
| 25 | movab _setsav,r0 | |
| 26 | movq r6,(r0)+ | |
| 27 | movq r8,(r0)+ | |
| 28 | movq r10,(r0)+ | |
| 29 | movq 8(fp),(r0)+ # ap, fp | |
| 30 | movab 4(ap),(r0)+ # sp | |
| 31 | movl 16(fp),(r0) # pc | |
| 32 | clrl r0 | |
| 33 | ret | |
| 34 | ||
| 35 | _reset: | |
| 36 | .word 0x0000 | |
| 37 | movl 4(ap),r0 # returned value | |
| 38 | movab _setsav,r1 | |
| 39 | movq (r1)+,r6 | |
| 40 | movq (r1)+,r8 | |
| 41 | movq (r1)+,r10 | |
| 42 | movq (r1)+,r12 | |
| 43 | movl (r1)+,sp | |
| 44 | jmp *(r1) | |
| 45 | ||
| 46 | _resexit: | |
| 47 | .word 0x0000 | |
| 48 | movc3 $40,*4(ap),_setsav | |
| 49 | ret | |
| 50 | _svkludg: | |
| 51 | movl (sp)+,out | |
| 52 | movq r0,myregs | |
| 53 | movq r2,myregs+8 | |
| 54 | movq r4,myregs+16 | |
| 55 | subl2 $40,sp | |
| 56 | movc3 $40,_setsav,(sp) | |
| 57 | movq myregs,r0 | |
| 58 | movq myregs+8,r2 | |
| 59 | movq myregs+16,r4 | |
| 60 | jmp *out | |
| 61 | ||
| 62 | _getexit: | |
| 63 | .word 0x0000 | |
| 64 | movc3 $40,_setsav,*4(ap) | |
| 65 | ret | |
| 66 | ||
| 67 | ||
| 68 | .data | |
| 69 | _setsav:.space 10*4 | |
| 70 | out: .space 4 | |
| 71 | myregs: .space 6*4 | |
| 72 |