ack/mach/sun3/libsys/head_em.s

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ArmAsm
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.define .lino,.filn
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.define EXIT, WRITE, BRK
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.define begtext,begdata,begbss
.define EARRAY,ERANGE,ESET,EIDIVZ,EHEAP,EILLINS,ECASE,EBADGTO
.define hol0,.reghp,.limhp,.trpim,.trppc
.sect .text
.sect .rom
.sect .data
.sect .bss
! runtime startof for 68020 machine
LINO_AD = 0
FILN_AD = 4
EARRAY = 0
ERANGE = 1
ESET = 2
EIDIVZ = 6
EHEAP = 17
EILLINS = 18
ECASE = 20
EBADGTO = 27
.sect .text
begtext:
move.l (sp),d2
lea (4,sp),a0
move.l d2,d1
add.l #1,d1
asl.l #2,d1
move.l a0,a1
add.l d1,a1
pea (a1)
pea (a0)
move.l d2,-(sp)
move.l #0,a6
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jsr (__m_a_i_n)
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move.l d0,(sp) ! no stack cleanup needed
EXIT:
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jsr (__exit)
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WRITE:
jmp (__write)
BRK:
jmp (__brk)
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.sect .data
begdata:
.data4 0 ! may be at virtual address 0 with no problem
hol0:
.lino:
.data4 0 ! lino
.filn:
.data4 0 ! filn
.reghp:
.data4 endbss
.limhp:
.data4 endbss
.trppc:
.data4 0
.trpim:
.data4 0 ! USED TO BE 2 BYTES; IS THIS RIGHT?
.sect .bss
begbss: !initialization is not needed because ALL entries are in zero space!