71 lines
1.3 KiB
ArmAsm
71 lines
1.3 KiB
ArmAsm
.define .lino,.filn
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.define EXIT
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.define begtext,begdata,begbss
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.define EARRAY,ERANGE,ESET,EIDIVZ,EHEAP,EILLINS,ECASE,EBADGTO
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.define hol0,.reghp,.limhp,.trpim,.trppc
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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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! runtime startof for 68020 machine
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LINO_AD = 0
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FILN_AD = 4
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EARRAY = 0
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ERANGE = 1
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ESET = 2
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EIDIVZ = 6
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EHEAP = 17
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EILLINS = 18
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ECASE = 20
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EBADGTO = 27
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.sect .text
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begtext:
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move.l d0,(splimit) ! load splimit with the initial stack limit
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sub.l #8,sp
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move.l (8,sp),(sp) ! argc
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lea (12,sp),a0
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move.l a0,(4,sp) ! argv
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move.l a0,a1
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1:
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tst.l (a0)+ ! null args term?
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bne 1b
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cmp.l (a1),a0 ! end of 'argv[]' and in *argv[] strings?
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blt 2f ! skip if a0 is less than start of *argv[]
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sub.l #4,a0 ! else backup one to set env = 0 (NULL)
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2:
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move.l a0,(8,sp) ! env
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! move.l a0, environ ! indir is 0 if no env; not 0 if env
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! jsr (initfpu) ! call to dummy floating point init routine
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jsr (_m_a_i_n)
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move.l d0,(sp) ! no stack cleanup needed
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EXIT:
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jsr (__exit)
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.sect .data
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begdata:
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splimit:
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.data4 0 ! may be at virtual address 0 with no problem
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hol0:
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.lino:
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.data4 0 ! lino
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.filn:
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.data4 0 ! filn
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.reghp:
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.data4 endbss
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.limhp:
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.data4 endbss
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.trppc:
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.data4 0
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.trpim:
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.data4 0 ! USED TO BE 2 BYTES; IS THIS RIGHT?
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.sect .bss
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begbss: !initialization is not needed because ALL entries are in zero space!
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