ack/mach/pmds4/libsys/sbrk.s
1985-02-07 22:59:50 +00:00

32 lines
399 B
ArmAsm

.define _sbrk
.define _brk
.extern _sbrk
.extern _brk
_sbrk: tst.b -8(sp)
move.l 4(sp),d0
beq 1f
add.l nd,d0
move.l d0,-(sp)
clr.l -(sp)
trap #0
.short 0x11
add.l #8,sp
bcc 1f
jmp cerror
1:
move.l nd,d0
move.l 4(sp),d1
add.l d1,nd
rts
_brk: trap #0
.short 0x11
bcc 1f
jmp cerror
1:
move.l 4(sp),nd
clr.l d0
rts
.data
nd: .long endbss
.text