From d1e44df1fa5fefd8a083f6c1e909bbcdc97c6438 Mon Sep 17 00:00:00 2001 From: Roland McGrath Date: Fri, 17 Apr 2015 09:02:19 -0700 Subject: Add arm-nacl port. --- sysdeps/nacl/dl-writev.h | 45 +++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 45 insertions(+) create mode 100644 sysdeps/nacl/dl-writev.h (limited to 'sysdeps/nacl/dl-writev.h') diff --git a/sysdeps/nacl/dl-writev.h b/sysdeps/nacl/dl-writev.h new file mode 100644 index 0000000000..e61d9d14f9 --- /dev/null +++ b/sysdeps/nacl/dl-writev.h @@ -0,0 +1,45 @@ +/* Message-writing for the dynamic linker. NaCl version. + Copyright (C) 2015 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) +{ + for (size_t i = 0; i < niov; ++i) + { + size_t wrote; + if (__nacl_irt_fdio.write (fd, iov[i].iov_base, iov[i].iov_len, + &wrote) != 0 + || wrote != iov[i].iov_len) + /* The write failed, so don't bother trying any more. */ + break; + } +} -- cgit v1.2.3