lkml.org 
[lkml]   [2007]   [Nov]   [7]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: compat_sys_times() bogus until jiffies >= 0.
Andrew Morton writes:

> "the latter" is what my protopatch does isn't it? It wraps at 0x7fffffff.
> It appears that glibc treats all of 0x80000000-0xffffffff as an error.

Not on powerpc. On powerpc the error indication is carried separately
in a condition register bit. So a force_successful_syscall_return()
call will make glibc automatically do the right thing without any
glibc changes on powerpc.

Wrapping at 0x7fffffff will cause programs to see large negative
deltas between successive calls when the wrap occurs. I can see that
giving userspace fits. :)

Paul.

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2007-11-08 06:01    [W:0.077 / U:1.040 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site