From: Joel Savitz > Sent: 02 May 2019 20:13 > Add a short explanation of the new PR_GET_TASK_SIZE option for the benefit > of future generations. > > Signed-off-by: Joel Savitz <jsav...@redhat.com> > --- > man2/prctl.2 | 9 +++++++++ > 1 file changed, 9 insertions(+) > > diff --git a/man2/prctl.2 b/man2/prctl.2 > index 06d8e13c7..35a6a3919 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 > +.\" 2019-05-02 Joel Savitz, document PR_GET_TASK_SIZE > .\" > .\" > .TH PRCTL 2 2019-03-06 "Linux" "Linux Programmer's Manual" > @@ -1375,6 +1376,14 @@ 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 "arg2" . > +Return > +.B EFAULT > +if this operation fails. > +
Shouldn't this say what the value is? ISTR a recent patch to change the was the 'used to be constant' TASK_SIZE is defined. I think it might be 'The highest userspace virtual address the current process can use.' But I might be wrong. David - Registered Address Lakeside, Bramley Road, Mount Farm, Milton Keynes, MK1 1PT, UK Registration No: 1397386 (Wales)