From d5e8275481e57cc7f3bd6ba435a7bbced9b97202 Mon Sep 17 00:00:00 2001 From: Roland McGrath Date: Mon, 6 May 2013 11:30:41 -0700 Subject: Split _dl_writev out from _dl_debug_vdprintf. --- sysdeps/unix/sysv/linux/dl-writev.h | 38 +++++++++++++++++++++++++++++++++++++ 1 file changed, 38 insertions(+) create mode 100644 sysdeps/unix/sysv/linux/dl-writev.h (limited to 'sysdeps/unix') diff --git a/sysdeps/unix/sysv/linux/dl-writev.h b/sysdeps/unix/sysv/linux/dl-writev.h new file mode 100644 index 0000000000..b682e0c4b6 --- /dev/null +++ b/sysdeps/unix/sysv/linux/dl-writev.h @@ -0,0 +1,38 @@ +/* Message-writing for the dynamic linker. Linux version. + Copyright (C) 2013 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + . */ + +#include +#include + +/* This is used from only one place: dl-misc.c:_dl_debug_vdprintf. + Hence it's in a header with the expectation it will be inlined. + + This is writev, but with a constraint added and others loosened: + + 1. Under RTLD_PRIVATE_ERRNO, it must not clobber the private errno + when another thread holds the dl_load_lock. + 2. It is not obliged to detect and report errors at all. + 3. It's not really obliged to deliver a single atomic write + (though it may be preferable). */ + +static inline void +_dl_writev (int fd, const struct iovec *iov, size_t niov) +{ + INTERNAL_SYSCALL_DECL (err); + INTERNAL_SYSCALL (writev, err, 3, fd, iov, niov); +} -- cgit v1.2.3