-/* Copyright (C) 1994-2015 Free Software Foundation, Inc.
+/* Copyright (C) 1994-2019 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
- <http://www.gnu.org/licenses/>. */
+ <https://www.gnu.org/licenses/>. */
#include <sys/types.h>
#include <sys/mman.h>
is nonzero, it is the desired mapping address. If the MAP_FIXED bit is
set in FLAGS, the mapping will be at ADDR exactly (which must be
page-aligned); otherwise the system chooses a convenient nearby address.
- The return value is the actual mapping address chosen or (__ptr_t) -1
+ The return value is the actual mapping address chosen or (void *) -1
for errors (in which case `errno' is set). A successful `mmap' call
deallocates any previous mapping for the affected region. */
-__ptr_t
-__mmap (__ptr_t addr, size_t len, int prot, int flags, int fd, off_t offset)
+void *
+__mmap (void *addr, size_t len, int prot, int flags, int fd, off_t offset)
{
error_t err;
vm_prot_t vmprot;
/* ADDR and OFFSET must be page-aligned. */
if ((mapaddr & (__vm_page_size - 1)) || (offset & (__vm_page_size - 1)))
- return (__ptr_t) (long int) __hurd_fail (EINVAL);
-
- if ((flags & (MAP_TYPE|MAP_INHERIT)) == MAP_ANON
- && prot == (PROT_READ|PROT_WRITE)) /* cf VM_PROT_DEFAULT */
- {
- /* vm_allocate has (a little) less overhead in the kernel too. */
- err = __vm_allocate (__mach_task_self (), &mapaddr, len, mapaddr == 0);
-
- if (err == KERN_NO_SPACE)
- {
- 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 != 0)
- err = __vm_allocate (__mach_task_self (), &mapaddr, len, 1);
- }
-
- return err ? (__ptr_t) (long int) __hurd_fail (err) : (__ptr_t) mapaddr;
- }
+ return (void *) (long int) __hurd_fail (EINVAL);
vmprot = VM_PROT_NONE;
if (prot & PROT_READ)
switch (flags & MAP_TYPE)
{
default:
- return (__ptr_t) (long int) __hurd_fail (EINVAL);
+ return (void *) (long int) __hurd_fail (EINVAL);
case MAP_ANON:
memobj = MACH_PORT_NULL;
{
if (err == MIG_BAD_ID || err == EOPNOTSUPP || err == ENOSYS)
err = ENODEV; /* File descriptor doesn't support mmap. */
- return (__ptr_t) (long int) __hurd_dfail (fd, err);
+ return (void *) (long int) __hurd_dfail (fd, err);
}
switch (prot & (PROT_READ|PROT_WRITE))
{
/* Remove extra reference. */
__mach_port_deallocate (__mach_task_self (), memobj);
}
- else if (wobj == MACH_PORT_NULL && /* Not writable by mapping. */
- !(flags & MAP_SHARED))
+ else if (wobj == MACH_PORT_NULL /* Not writable by mapping. */
+ && !(flags & MAP_SHARED))
/* The file can only be mapped for reading. Since we are
making a private mapping, we will never try to write the
object anyway, so we don't care. */
else
{
__mach_port_deallocate (__mach_task_self (), wobj);
- return (__ptr_t) (long int) __hurd_fail (EACCES);
+ return (void *) (long int) __hurd_fail (EACCES);
}
break;
default:
__mach_port_deallocate (__mach_task_self (), memobj);
if (err)
- return (__ptr_t) (long int) __hurd_fail (err);
+ return (void *) (long int) __hurd_fail (err);
- return (__ptr_t) mapaddr;
+ return (void *) mapaddr;
}
+libc_hidden_def (__mmap)
weak_alias (__mmap, mmap)