1987-02-23 18:58:58 +00:00
|
|
|
#include "syscall.h"
|
1990-01-11 16:00:19 +00:00
|
|
|
.extern _end
|
1987-02-23 18:58:58 +00:00
|
|
|
DEFINE(_brk)
|
1990-01-11 16:00:19 +00:00
|
|
|
cmpl 4(ap),Imin
|
|
|
|
|
bgeq Iok
|
|
|
|
|
movl Imin,4(ap)
|
|
|
|
|
Iok:
|
1987-02-23 18:58:58 +00:00
|
|
|
chmk $17
|
1990-01-11 16:00:19 +00:00
|
|
|
bcs Ierr
|
|
|
|
|
movl 4(ap),Icur
|
1987-02-23 18:58:58 +00:00
|
|
|
clrl r0
|
|
|
|
|
ret
|
1990-01-11 16:00:19 +00:00
|
|
|
Ierr:
|
1987-02-23 18:58:58 +00:00
|
|
|
jmp cerror
|
|
|
|
|
|
|
|
|
|
DEFINE(_sbrk)
|
1990-01-12 10:11:44 +00:00
|
|
|
addl3 Icur,4(ap),-(sp)
|
1990-01-11 16:00:19 +00:00
|
|
|
bcs Ierr
|
1987-02-23 18:58:58 +00:00
|
|
|
pushl $1
|
|
|
|
|
movl ap,r3
|
|
|
|
|
movl sp,ap
|
|
|
|
|
chmk $17
|
1990-01-11 16:00:19 +00:00
|
|
|
bcs Ierr
|
|
|
|
|
movl Icur,r0
|
|
|
|
|
addl2 4(r3),Icur
|
1987-02-23 18:58:58 +00:00
|
|
|
ret
|
1990-01-11 16:00:19 +00:00
|
|
|
.sect .data
|
|
|
|
|
Imin: .data4 _end
|
|
|
|
|
Icur: .data4 _end
|
