ack/plat/pdpv7/libsys/_sbrk.s

39 lines
407 B
ArmAsm
Raw Normal View History

1990-01-22 11:24:37 +00:00
#include "sys.h"
.define __sbrk
.define __brk
.extern _end
.extern _errno
__sbrk:
mov 2(sp),0f+2
beq 1f
1990-04-23 13:39:26 +00:00
add .limhp,0f+2
1990-01-22 11:24:37 +00:00
bcs 2f
sys indir; .data2 0f
bcc 1f
2:
mov r0,_errno
mov $-1,r0
rts pc
1:
1990-04-23 13:39:26 +00:00
mov .limhp,r0
add 2(sp),.limhp
1990-01-22 11:24:37 +00:00
rts pc
__brk:
mov 2(sp),0f+2
sys indir; .data2 0f
bcc 1f
mov r0,_errno
mov $-1,r0
rts pc
1:
1990-04-23 13:39:26 +00:00
mov 2(sp),.limhp
1990-01-22 11:24:37 +00:00
clr r0
rts pc
.sect .data
0:
sys break
.data2 0