[src/trunk]: src/sys/rump/librump/rumpkern Implement enough of uvm_mmap() to ...

[pooka <pooka%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/2da972009f9b
branches:  trunk
changeset: 749620:2da972009f9b
user:      pooka <pooka%NetBSD.org@localhost>
date:      Fri Dec 04 17:15:47 2009 +0000

description:
Implement enough of uvm_mmap() to make the creative proplib ioctl
copyout code work.  No comments ... okok, if that'll make you leave
me alone: it's ioctl, so it's supposed to be funky (with a score
or two of psychedelic rock).

diffstat:

 sys/rump/librump/rumpkern/vm.c |  28 +++++++++++++++++++++++++---
 1 files changed, 25 insertions(+), 3 deletions(-)

diffs (58 lines):

diff -r 93836afaf55e -r 2da972009f9b sys/rump/librump/rumpkern/vm.c
--- a/sys/rump/librump/rumpkern/vm.c    Fri Dec 04 17:11:10 2009 +0000
+++ b/sys/rump/librump/rumpkern/vm.c    Fri Dec 04 17:15:47 2009 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: vm.c,v 1.68 2009/12/04 16:47:33 pooka Exp $    */
+/*     $NetBSD: vm.c,v 1.69 2009/12/04 17:15:47 pooka Exp $    */
 
 /*
  * Copyright (c) 2007 Antti Kantee.  All Rights Reserved.
@@ -41,11 +41,12 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: vm.c,v 1.68 2009/12/04 16:47:33 pooka Exp $");
+__KERNEL_RCSID(0, "$NetBSD: vm.c,v 1.69 2009/12/04 17:15:47 pooka Exp $");
 
 #include <sys/param.h>
 #include <sys/atomic.h>
 #include <sys/kmem.h>
+#include <sys/mman.h>
 #include <sys/null.h>
 #include <sys/vnode.h>
 #include <sys/buf.h>
@@ -265,12 +266,33 @@
        /* nada */
 }
 
+/*
+ * This satisfies the "disgusting mmap hack" used by proplib.
+ * We probably should grow some more assertables to make sure we're
+ * not satisfying anything we shouldn't be satisfying.  At least we
+ * should make sure it's the local machine we're mmapping ...
+ */
 int
 uvm_mmap(struct vm_map *map, vaddr_t *addr, vsize_t size, vm_prot_t prot,
        vm_prot_t maxprot, int flags, void *handle, voff_t off, vsize_t locklim)
 {
+       void *uaddr;
+       int error;
 
-       panic("%s: unimplemented", __func__);
+       if (prot != (VM_PROT_READ | VM_PROT_WRITE))
+               panic("uvm_mmap() variant unsupported");
+       if (flags != (MAP_PRIVATE | MAP_ANON))
+               panic("uvm_mmap() variant unsupported");
+       /* no reason in particular, but cf. uvm_default_mapaddr() */
+       if (*addr != 0)
+               panic("uvm_mmap() variant unsupported");
+
+       uaddr = rumpuser_anonmmap(size, 0, 0, &error);
+       if (uaddr == NULL)
+               return error;
+
+       *addr = (vaddr_t)uaddr;
+       return 0;
 }
 
 struct pagerinfo {