29 lines
346 B
ArmAsm
29 lines
346 B
ArmAsm
|
#include "syscall.h"
|
||
|
|
DEFINE(__brk)
|
||
|
|
cmpl 4(ap),Imin
|
||
|
|
bgeq Iok
|
||
|
|
movl Imin,4(ap)
|
||
|
|
Iok:
|
||
|
|
chmk $17
|
||
|
|
bcs Ierr
|
||
|
|
movl 4(ap),Icur
|
||
|
|
clrl r0
|
||
|
|
ret
|
||
|
|
Ierr:
|
||
|
|
jmp cerror
|
||
|
|
|
||
|
|
DEFINE(__sbrk)
|
||
|
|
addl3 Icur,4(ap),-(sp)
|
||
|
|
bcs Ierr
|
||
|
|
pushl $1
|
||
|
|
movl ap,r3
|
||
|
|
movl sp,ap
|
||
|
|
chmk $17
|
||
|
|
bcs Ierr
|
||
|
|
movl Icur,r0
|
||
|
|
addl2 4(r3),Icur
|
||
|
|
ret
|
||
|
|
.sect .data
|
||
|
|
Imin: .data4 endbss
|
||
|
|
Icur: .data4 endbss
|