Add a short explanation of the new PR_GET_TASK_SIZE option for the benefit
of future generations.
Suggested-by: David Laight <david.lai...@aculab.com>
Signed-off-by: Joel Savitz <jsav...@redhat.com>
---
man2/prctl.2 | 10 ++++++++++
1 file changed, 10 insertions(+)
diff --git a/man2/prctl.2 b/man2/prctl.2
index 06d8e13c7..cae582726 100644
--- a/man2/prctl.2
+++ b/man2/prctl.2
@@ -49,6 +49,7 @@
.\" 2013-01-10 Kees Cook, document PR_SET_PTRACER
.\" 2012-02-04 Michael Kerrisk, document PR_{SET,GET}_CHILD_SUBREAPER
.\" 2014-11-10 Dave Hansen, document PR_MPX_{EN,DIS}ABLE_MANAGEMENT
+.\" 2019-05-03 Joel Savitz, document PR_GET_TASK_SIZE
.\"
.\"
.TH PRCTL 2 2019-03-06 "Linux" "Linux Programmer's Manual"
@@ -1375,6 +1376,15 @@ system call on Tru64).
for information on versions and architectures)
Return unaligned access control bits, in the location pointed to by
.IR "(unsigned int\ *) arg2" .
+.TP
+.B PR_GET_TASK_SIZE
+Copy the value of TASK_SIZE to the userspace address in
+.IR "(unsigned long\ *) arg2" .
+This value represents the highest virtual address available
+to the current process. Return
+.B EFAULT
+if this operation fails.
+
.SH RETURN VALUE
On success,
.BR PR_GET_DUMPABLE ,
--
2.18.1
