94 lines
2.2 KiB
Plaintext
94 lines
2.2 KiB
Plaintext
.sect .text
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.sect .rom
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.sect .data
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.sect .bss
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.sect .text
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_sigtrp: move.l (sp)+,d2 !save return address
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mov (sp)+,d1 !trapno in d1
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mov (sp)+,d4 !signo in d4
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extend d4
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extend d1
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comp #16,d4
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bhi sig_bad
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tst.l d4
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beq sig_bad
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move.l d4,a0
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add.l a0,a0
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add.l a0,a0
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lea sig_trp-4(a0),a1
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move.l (a1),d2 !previous trap number in d2
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comp #256,d1 !-2 and -1 special
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bcc 1f
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move.l sig_adr-4(a0),d3 !Get the pointer to the trap-
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bne 2f !procedure to give as argument to
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sig_bad: mov 22,-(sp) !_Xsignal. If pointer 0 trapping is
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mov 22,-(sp) !not legal
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jmp (a4)
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1: comp #-3,d1 !-2:reset default , -3: ignore
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bmi sig_bad
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move.l d1,d3
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ad #2,d3 !0:reset default for signal, -1: ignore
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2: move.l d1,(a1) !set new trapno
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move.l d3,-(sp) !set arguments to signal:
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mov d4,-(sp) !pointer ,signo to be trapped
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bsr _Xsignal
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jmp (a4)
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.sect .data
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sig_adr: .data4 sig1 ; .data4 sig2 ; .data4 sig3 ; .data4 0
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.data4 0 ; .data4 0 ; .data4 0 ; .data4 0
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.data4 0 ; .data4 0 ; .data4 sig11 ; .data4 sig12
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.data4 sig13 ; .data4 sig14 ; .data4 sig15 ; .data4 sig16
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sig_trp: .data4 -2 ; .data4 -2 ; .data4 -2 ; .data4 -2
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.data4 -2 ; .data4 -2 ; .data4 -2 ; .data4 -2
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.data4 -2 ; .data4 -2 ; .data4 21 ; .data4 25
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.data4 -2 ; .data4 -2 ; .data4 -2 ; .data4 -2
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.sect .text
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!the next procedures map the catched signal to em errors. The em error
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!procedure will handle this.
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sig1: pea retutrap
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move.l sig_trp,d0
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mov d0,-(sp)
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bra error
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sig2: pea retutrap
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move.l sig_trp+4,d0
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mov d0,-(sp)
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bra error
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sig3: pea retutrap
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move.l sig_trp+8,d0
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mov d0,-(sp)
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bra error
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sig8: pea retutrap
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move.l sig_trp+28,d0
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mov d0,-(sp)
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bra error
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sig13: pea retutrap
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move.l sig_trp+48,d0
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mov d0,-(sp)
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bra error
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sig14: pea retutrap
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move.l sig_trp+52,d0
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mov d0,-(sp)
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bra error
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sig15: pea retutrap
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move.l sig_trp+56,d0
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mov d0,-(sp)
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bra error
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sig16: pea retutrap
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move.l sig_trp+60,d0
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mov d0,-(sp)
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bra error
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retutrap: add.l #4,sp !remove signumber
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rtr
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sig12: pea sig12
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mov #12,-(sp)
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bsr _Xsignal
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bsr e_badmon
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rtr
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sig11: move.l 4(a5),d0
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sub.l sp,d0
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bcs e_memflt !in this case error handling possible
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move.l ml,sp !refresh stack and stop .
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bra notrap1
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