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authorSamuel Thibault <samuel.thibault@ens-lyon.org>2012-01-23 13:59:55 -0800
committerRoland McGrath <roland@hack.frob.com>2012-01-23 14:00:47 -0800
commit0ea698ae7817329603d0afea7904a909bd59eac6 (patch)
tree09e0f50ee61c9ce31460d917f6649d40299afcd6 /sysdeps
parent81c0c9648d8bdaafde6e8e407dce90c21aa115e9 (diff)
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Hurd: Try to respect mmap address hint for non-MAP_FIXED.
Diffstat (limited to 'sysdeps')
-rw-r--r--sysdeps/mach/hurd/mmap.c46
1 files changed, 31 insertions, 15 deletions
diff --git a/sysdeps/mach/hurd/mmap.c b/sysdeps/mach/hurd/mmap.c
index 1d1460cead..e08e999fc9 100644
--- a/sysdeps/mach/hurd/mmap.c
+++ b/sysdeps/mach/hurd/mmap.c
@@ -1,4 +1,4 @@
-/* Copyright (C) 1994,1995,1996,1997,1999,2002,2003,2004
+/* Copyright (C) 1994,1995,1996,1997,1999,2002,2003,2004,2012
Free Software Foundation, Inc.
This file is part of the GNU C Library.
@@ -51,15 +51,20 @@ __mmap (__ptr_t addr, size_t len, int prot, int flags, int fd, off_t offset)
{
/* vm_allocate has (a little) less overhead in the kernel too. */
err = __vm_allocate (__mach_task_self (), &mapaddr, len,
- !(flags & MAP_FIXED));
+ mapaddr == NULL);
- if (err == KERN_NO_SPACE && (flags & MAP_FIXED))
+ if (err == KERN_NO_SPACE)
{
- /* XXX this is not atomic as it is in unix! */
- /* The region is already allocated; deallocate it first. */
- err = __vm_deallocate (__mach_task_self (), mapaddr, len);
- if (!err)
- err = __vm_allocate (__mach_task_self (), &mapaddr, len, 0);
+ if (flags & MAP_FIXED)
+ {
+ /* XXX this is not atomic as it is in unix! */
+ /* The region is already allocated; deallocate it first. */
+ err = __vm_deallocate (__mach_task_self (), mapaddr, len);
+ if (!err)
+ err = __vm_allocate (__mach_task_self (), &mapaddr, len, 0);
+ }
+ else if (mapaddr != NULL)
+ err = __vm_allocate (__mach_task_self (), &mapaddr, len, 1);
}
return err ? (__ptr_t) (long int) __hurd_fail (err) : (__ptr_t) mapaddr;
@@ -135,21 +140,32 @@ __mmap (__ptr_t addr, size_t len, int prot, int flags, int fd, off_t offset)
err = __vm_map (__mach_task_self (),
&mapaddr, (vm_size_t) len, (vm_address_t) 0,
- ! (flags & MAP_FIXED),
+ mapaddr == NULL,
memobj, (vm_offset_t) offset,
! (flags & MAP_SHARED),
vmprot, VM_PROT_ALL,
(flags & MAP_SHARED) ? VM_INHERIT_SHARE : VM_INHERIT_COPY);
- if (err == KERN_NO_SPACE && (flags & MAP_FIXED))
+ if (err == KERN_NO_SPACE)
{
- /* XXX this is not atomic as it is in unix! */
- /* The region is already allocated; deallocate it first. */
- err = __vm_deallocate (__mach_task_self (), mapaddr, len);
- if (! err)
+ if (flags & MAP_FIXED)
+ {
+ /* XXX this is not atomic as it is in unix! */
+ /* The region is already allocated; deallocate it first. */
+ err = __vm_deallocate (__mach_task_self (), mapaddr, len);
+ if (! err)
+ err = __vm_map (__mach_task_self (),
+ &mapaddr, (vm_size_t) len, (vm_address_t) 0,
+ 0, memobj, (vm_offset_t) offset,
+ ! (flags & MAP_SHARED),
+ vmprot, VM_PROT_ALL,
+ (flags & MAP_SHARED) ? VM_INHERIT_SHARE
+ : VM_INHERIT_COPY);
+ }
+ else if (mapaddr != NULL)
err = __vm_map (__mach_task_self (),
&mapaddr, (vm_size_t) len, (vm_address_t) 0,
- 0, memobj, (vm_offset_t) offset,
+ 1, memobj, (vm_offset_t) offset,
! (flags & MAP_SHARED),
vmprot, VM_PROT_ALL,
(flags & MAP_SHARED) ? VM_INHERIT_SHARE