From owner-svn-src-head@freebsd.org Sat Oct 1 22:08:09 2016 Return-Path: Delivered-To: svn-src-head@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 6E6EDA94D83; Sat, 1 Oct 2016 22:08:09 +0000 (UTC) (envelope-from jhb@FreeBSD.org) Received: from repo.freebsd.org (repo.freebsd.org [IPv6:2610:1c1:1:6068::e6a:0]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id 24FF6E8C; Sat, 1 Oct 2016 22:08:09 +0000 (UTC) (envelope-from jhb@FreeBSD.org) Received: from repo.freebsd.org ([127.0.1.37]) by repo.freebsd.org (8.15.2/8.15.2) with ESMTP id u91M88VA033784; Sat, 1 Oct 2016 22:08:08 GMT (envelope-from jhb@FreeBSD.org) Received: (from jhb@localhost) by repo.freebsd.org (8.15.2/8.15.2/Submit) id u91M88U2033782; Sat, 1 Oct 2016 22:08:08 GMT (envelope-from jhb@FreeBSD.org) Message-Id: <201610012208.u91M88U2033782@repo.freebsd.org> X-Authentication-Warning: repo.freebsd.org: jhb set sender to jhb@FreeBSD.org using -f From: John Baldwin Date: Sat, 1 Oct 2016 22:08:08 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r306564 - in head: sys/sys usr.bin/kdump X-SVN-Group: head MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-BeenThere: svn-src-head@freebsd.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: SVN commit messages for the src tree for head/-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 01 Oct 2016 22:08:09 -0000 Author: jhb Date: Sat Oct 1 22:08:07 2016 New Revision: 306564 URL: https://svnweb.freebsd.org/changeset/base/306564 Log: Expose kernel-only errno values if _WANT_KERNEL_ERRNO is defined. The kernel uses a few negative errno values for internal conditions such as requesting a system call restart. Normally these errno values are not exposed to userland. However, kdump needs access to these values as some of then can be present in a ktrace system call return record. Previously kdump was defining _KERNEL to gain access to ehse values, but was then having to manually declare 'errno' (and doing it incorrectly). Now, kdump uses _WANT_KERNEL_ERRNO instead of _KERNEL and uses the system-provided declaration of errno. Modified: head/sys/sys/errno.h head/usr.bin/kdump/kdump.c Modified: head/sys/sys/errno.h ============================================================================== --- head/sys/sys/errno.h Sat Oct 1 22:03:41 2016 (r306563) +++ head/sys/sys/errno.h Sat Oct 1 22:08:07 2016 (r306564) @@ -184,7 +184,7 @@ __END_DECLS #define ELAST 96 /* Must be equal largest errno */ #endif /* _POSIX_SOURCE */ -#ifdef _KERNEL +#if defined(_KERNEL) || defined(_WANT_KERNEL_ERRNO) /* pseudo-errors returned inside kernel to modify return to process */ #define ERESTART (-1) /* restart syscall */ #define EJUSTRETURN (-2) /* don't modify regs, just return */ Modified: head/usr.bin/kdump/kdump.c ============================================================================== --- head/usr.bin/kdump/kdump.c Sat Oct 1 22:03:41 2016 (r306563) +++ head/usr.bin/kdump/kdump.c Sat Oct 1 22:08:07 2016 (r306564) @@ -41,10 +41,7 @@ static char sccsid[] = "@(#)kdump.c 8.1 #include __FBSDID("$FreeBSD$"); -#define _KERNEL -extern int errno; -#include -#undef _KERNEL +#define _WANT_KERNEL_ERRNO #include #include #include