ack/mach/vax4/libbsd4_1a/sbrk.s

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.sect .text; .sect .rom; .sect .data; .sect .bss
.sect .text
break = 17
.define _sbrk
.define _brk
.define _end
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.align 1
_sbrk:
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.data2 0x0000
addl3 Ibrk,4(ap),-(sp)
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bcc 1f
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movl $0xFFFFFFFF,(sp) ! will cause an error (I hope)
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1:
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movl Ibrk,r3
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calls $1,_brk
tstl r0
blss 1f
movl r3,r0
1:
ret
.align 1
_brk:
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.data2 0x0000
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chmk $break
bcc 1f
jmp errmon
1:
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movl 4(ap),Ibrk
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clrl r0
ret
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.sect .data
Ibrk: .data4 _end