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| author |   niklas <niklas@openbsd.org> | 1999-08-17 10:32:16 +0000 |
|---|---|---|
| committer | niklas <niklas@openbsd.org> | 1999-08-17 10:32:16 +0000 |
| commit | 9c2090272aee3ad7a054aba6b9736090fb33f78a (patch) | |
| tree | d1801380d9503618e35645ab16f44d5be0d8c201 /sys/kern/kern_fork.c | |
| parent | More <sys/file.h> vs. <fcntl.h> and open() flags fixes. (diff) | |
| download | wireguard-openbsd-9c2090272aee3ad7a054aba6b9736090fb33f78a.tar.xz wireguard-openbsd-9c2090272aee3ad7a054aba6b9736090fb33f78a.zip | |
New cpu_fork API to take a stack in which you point the child's stackpointer
to, at the bottom or the top, depending on your architecture's stack growth
direction. This is in preparation for Linux' clone(2) emulation.
port maintainers, please check that I did the work right.
Diffstat (limited to 'sys/kern/kern_fork.c')
| -rw-r--r-- | sys/kern/kern_fork.c | 20 |
1 files changed, 12 insertions, 8 deletions
diff --git a/sys/kern/kern_fork.c b/sys/kern/kern_fork.c index ef16a476ee7..364e767b3f6 100644 --- a/sys/kern/kern_fork.c +++ b/sys/kern/kern_fork.c @@ -1,4 +1,4 @@ -/* $OpenBSD: kern_fork.c,v 1.23 1999/08/15 00:07:43 pjanzen Exp $ */ +/* $OpenBSD: kern_fork.c,v 1.24 1999/08/17 10:32:18 niklas Exp $ */ /* $NetBSD: kern_fork.c,v 1.29 1996/02/09 18:59:34 christos Exp $ */ /* @@ -78,7 +78,7 @@ sys_fork(p, v, retval) void *v; register_t *retval; { - return (fork1(p, ISFORK, 0, retval)); + return (fork1(p, ISFORK, 0, NULL, 0, retval)); } /*ARGSUSED*/ @@ -88,7 +88,7 @@ sys_vfork(p, v, retval) void *v; register_t *retval; { - return (fork1(p, ISVFORK, 0, retval)); + return (fork1(p, ISVFORK, 0, NULL, 0, retval)); } int @@ -101,14 +101,16 @@ sys_rfork(p, v, retval) syscallarg(int) flags; } */ *uap = v; - return (fork1(p, ISRFORK, SCARG(uap, flags), retval)); + return (fork1(p, ISRFORK, SCARG(uap, flags), NULL, 0, retval)); } int -fork1(p1, forktype, rforkflags, retval) +fork1(p1, forktype, rforkflags, stack, stacksize, retval) register struct proc *p1; int forktype; int rforkflags; + void *stack; + size_t stacksize; register_t *retval; { register struct proc *p2; @@ -334,7 +336,7 @@ again: */ retval[0] = 0; retval[1] = 1; - if (vm_fork(p1, p2)) + if (vm_fork(p1, p2, stack, stacksize)) return (0); #else /* @@ -342,9 +344,11 @@ again: * different path later. */ #if defined(UVM) - uvm_fork(p1, p2, (forktype == ISRFORK && (rforkflags & RFMEM)) ? TRUE : FALSE); + uvm_fork(p1, p2, + (forktype == ISRFORK && (rforkflags & RFMEM)) ? TRUE : FALSE, + stack, stacksize); #else /* UVM */ - vm_fork(p1, p2); + vm_fork(p1, p2, stack, stacksize); #endif /* UVM */ #endif vm = p2->p_vmspace; |