public inbox for
help / color / mirror / Atom feed
* [newlib-cygwin] Add a shm_open2 syscall to support upcoming memfd_create
@ 2022-07-11 11:50 Sebastian Huber
  0 siblings, 0 replies; only message in thread
From: Sebastian Huber @ 2022-07-11 11:50 UTC (permalink / raw)
  To: newlib-cvs;h=99b66f53154560be576365fba7880f1e2e73de28

commit 99b66f53154560be576365fba7880f1e2e73de28
Author: Kyle Evans <>
Date:   Wed Sep 25 17:59:15 2019 +0000

    Add a shm_open2 syscall to support upcoming memfd_create
    shm_open2 allows a little more flexibility than the original shm_open.
    shm_open2 doesn't enforce CLOEXEC on its callers, and it has a separate
    shmflag argument that can be expanded later. Currently the only shmflag is
    to allow file sealing on the returned fd.
    shm_open and memfd_create will both be implemented in libc to use this new
    __FreeBSD_version is bumped to indicate the presence.
    Reviewed by:    kib, markj
    Differential Revision:

 newlib/libc/sys/rtems/include/sys/mman.h | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/newlib/libc/sys/rtems/include/sys/mman.h b/newlib/libc/sys/rtems/include/sys/mman.h
index f75490c96..6e178d83d 100644
--- a/newlib/libc/sys/rtems/include/sys/mman.h
+++ b/newlib/libc/sys/rtems/include/sys/mman.h
@@ -176,6 +176,12 @@
  * Anonymous object constant for shm_open().
 #define	SHM_ANON		((char *)1)
+ * shmflags for shm_open2()
+ */
+#define	SHM_ALLOW_SEALING		0x00000001
 #endif /* __BSD_VISIBLE */

^ permalink raw reply	[flat|nested] only message in thread

only message in thread, other threads:[~2022-07-11 11:50 UTC | newest]

Thread overview: (only message) (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2022-07-11 11:50 [newlib-cygwin] Add a shm_open2 syscall to support upcoming memfd_create Sebastian Huber

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).