diff options
Diffstat (limited to 'sysdeps/mach/hurd/mmap.c')
| -rw-r--r-- | sysdeps/mach/hurd/mmap.c | 24 |
1 files changed, 5 insertions, 19 deletions
diff --git a/sysdeps/mach/hurd/mmap.c b/sysdeps/mach/hurd/mmap.c index 85bde529b9..1d1460cead 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 +/* Copyright (C) 1994,1995,1996,1997,1999,2002,2003,2004 Free Software Foundation, Inc. This file is part of the GNU C Library. @@ -39,10 +39,13 @@ __mmap (__ptr_t addr, size_t len, int prot, int flags, int fd, off_t offset) vm_prot_t vmprot; memory_object_t memobj; vm_address_t mapaddr; - vm_size_t pageoff; mapaddr = (vm_address_t) addr; + /* 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 */ { @@ -62,20 +65,6 @@ __mmap (__ptr_t addr, size_t len, int prot, int flags, int fd, off_t offset) return err ? (__ptr_t) (long int) __hurd_fail (err) : (__ptr_t) mapaddr; } - pageoff = offset & (vm_page_size - 1); - offset &= ~(vm_page_size - 1); - - if (flags & MAP_FIXED) - { - /* A specific address is requested. It need not be page-aligned; - it just needs to be congruent with the object offset. */ - if ((mapaddr & (vm_page_size - 1)) != pageoff) - return (__ptr_t) (long int) __hurd_fail (EINVAL); - else - /* We will add back PAGEOFF after mapping. */ - mapaddr -= pageoff; - } - vmprot = VM_PROT_NONE; if (prot & PROT_READ) vmprot |= VM_PROT_READ; @@ -173,9 +162,6 @@ __mmap (__ptr_t addr, size_t len, int prot, int flags, int fd, off_t offset) if (err) return (__ptr_t) (long int) __hurd_fail (err); - /* Adjust the mapping address for the offset-within-page. */ - mapaddr += pageoff; - return (__ptr_t) mapaddr; } |