diff options
author | Philip Guenthe <guenther@cvs.openbsd.org> | 2011-10-16 06:54:48 +0000 |
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committer | Philip Guenthe <guenther@cvs.openbsd.org> | 2011-10-16 06:54:48 +0000 |
commit | feb9286a410daaaf4a0363b5838043f07ce53ec3 (patch) | |
tree | 5d06e50686201d317b11a4b10e619d5257bfd9e3 /lib/libc/sys/__get_tcb.2 | |
parent | 3f727c22b753ceb4d040d3a82e49e7c2b2da2407 (diff) |
Fixes and tweaks from jmc@
Diffstat (limited to 'lib/libc/sys/__get_tcb.2')
-rw-r--r-- | lib/libc/sys/__get_tcb.2 | 14 |
1 files changed, 7 insertions, 7 deletions
diff --git a/lib/libc/sys/__get_tcb.2 b/lib/libc/sys/__get_tcb.2 index 6cd28d53fad..45521acac92 100644 --- a/lib/libc/sys/__get_tcb.2 +++ b/lib/libc/sys/__get_tcb.2 @@ -1,4 +1,4 @@ -.\" $OpenBSD: __get_tcb.2,v 1.1 2011/10/16 06:21:52 guenther Exp $ +.\" $OpenBSD: __get_tcb.2,v 1.2 2011/10/16 06:54:47 guenther Exp $ .\" .\" Copyright (c) 2011 Philip Guenther <guenther@openbsd.org> .\" @@ -20,7 +20,7 @@ .Sh NAME .Nm __get_tcb , .Nm __set_tcb -.Nd "get and set the address of the thread-control-block of the current thread" +.Nd get and set the address of the thread control block of the current thread .Sh SYNOPSIS .Ft void * .Fn __get_tcb "void" @@ -31,13 +31,13 @@ The .Fn __get_tcb and .Fn __set_tcb -are for use by librthread and other parts of the system runtime to -retrieve and set the address of the current thread's TCB -(thread-control-block). +functions are for use by librthread and other parts of the system +runtime to retrieve and set the address of the current thread's +thread control block (TCB). This is used to locate per-thread data such as .Va errno . Each kernel-level thread in a process has a separate value for this -address which can be obtained and changed via these system calls. +address, which can be obtained and changed via these system calls. New threads (including the first thread of a new process) created using .Xr fork 2 , .Xr vfork 2 , @@ -52,7 +52,7 @@ On some platforms, this address is also directly mapped to a CPU register which can be accessed from userspace. .Sh RETURN VALUES .Fn __get_tcb -returns the address of the thread-control-block of the current thread. +returns the address of the thread control block of the current thread. .Sh SEE ALSO .Xr rfork 2 .Sh HISTORY |