ack/plat/pdpv7/libsys/vfork.s
David Given 4b5a7fee14 Made the cgg and the cg code generator work; use this to beat the PDP/11
backend into shape. It now generates binaries --- no idea whether they work or
not.
2018-02-23 22:31:46 +01:00

19 lines
214 B
ArmAsm

#include "sys.h"
.define _vfork
.extern _errno
_vfork:
mov (sp)+,r1
sys vfork
br 1f
bcc 2f
3: mov r0,_errno
mov $-1,r0
jmp (r1)
1: ! child, or vfork systemcall does not exist
bcs 3b
clr r0
2:
jmp (r1)