[02/44] Add a mmap flag (MAP_32BIT) on 64-bit platforms to request that a mapping use an address in the first 2GB of the process's address space. This flag should have the same semantics as the same flag on Linux.

Message ID 20180809060936.9726-3-sebastian.huber@embedded-brains.de
State New
Headers show
Series
  • Update RTEMS-specific header files to latest FreeBSD versions
Related show

Commit Message

Sebastian Huber Aug. 9, 2018, 6:08 a.m.
From: jhb <jhb@FreeBSD.org>


To facilitate this, add a new parameter to vm_map_find() that specifies an
optional maximum virtual address.  While here, fix several callers of
vm_map_find() to use a VMFS_* constant for the findspace argument instead of
TRUE and FALSE.

Reviewed by:	alc
Approved by:	re (kib)
---
 newlib/libc/sys/rtems/include/sys/mman.h | 3 +++
 1 file changed, 3 insertions(+)

-- 
2.13.7

Patch

diff --git a/newlib/libc/sys/rtems/include/sys/mman.h b/newlib/libc/sys/rtems/include/sys/mman.h
index 536bfd562..6c757c8ba 100644
--- a/newlib/libc/sys/rtems/include/sys/mman.h
+++ b/newlib/libc/sys/rtems/include/sys/mman.h
@@ -91,6 +91,9 @@ 
  */
 #define	MAP_NOCORE	 0x00020000 /* dont include these pages in a coredump */
 #define	MAP_PREFAULT_READ 0x00040000 /* prefault mapping for reading */
+#ifdef __LP64__
+#define	MAP_32BIT	 0x00080000 /* map in the low 2GB of address space */
+#endif
 
 /*
  * Request specific alignment (n == log2 of the desired alignment).