33 lines
761 B
ArmAsm
33 lines
761 B
ArmAsm
#define FREEREGS d0-d1/a0-a1
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.define __begsig
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.extern __vectab
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.extern __M
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.sect .text
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.sect .rom
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.sect .data
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.sect .bss
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mtype = 2 ! M+mtype = &M.m_type
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.sect .text
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__begsig:
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movem.l FREEREGS,-(sp)
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clr.l d0
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#ifdef ALCYON
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move.w 24(sp),d0 ! d0 = signal number
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#else
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move.w 16(sp),d0 ! d0 = signal number
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#endif
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move.w __M+mtype,-(sp) ! push status of last system call
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move.w d0,-(sp) ! func called with signal number as arg
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asl.l #2,d0 ! pointers are four bytes on 68000
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move.l #__vectab,a0
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move.l -4(a0,d0),a0 ! a0 = address of routine to call
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jsr (a0)
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back:
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add.l #2,sp ! get signal number off stack
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move.w (sp)+,__M+mtype ! restore status of previous system call
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movem.l (sp)+,FREEREGS
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add.l #2,sp ! remove signal number from stack
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rtr
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