ack/mach/mantra/libsys/brk.s

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.define _brk
.define _sbrk
.sect .text
.sect .rom
.sect .data
.sect .bss
.sect .text
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_sbrk: move.l .limhp,a0
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add.l 4(sp),a0
move.l #0x11,d0
trap #0
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bcs Icerror
move.l .limhp,d0
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move.l d0,a0
add.l 4(sp),a0
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move.l a0,.limhp
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rts
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Icerror: jmp cerror
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_brk: move.l #0x11,d0
move.l 4(sp),a0
trap #0
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bcs Icerror
move.l 4(sp),.limhp
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clr.l d0
rts