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author | Roland McGrath <roland@hack.frob.com> | 2013-05-06 11:30:41 -0700 |
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committer | Roland McGrath <roland@hack.frob.com> | 2013-05-06 11:30:41 -0700 |
commit | d5e8275481e57cc7f3bd6ba435a7bbced9b97202 (patch) | |
tree | dd10221ec817a1920c159ea44a5643bd15e0b35f /sysdeps | |
parent | b7dab1e4d7265fc75a9890cbce897be3f8e4f044 (diff) | |
download | glibc-d5e8275481e57cc7f3bd6ba435a7bbced9b97202.tar.gz glibc-d5e8275481e57cc7f3bd6ba435a7bbced9b97202.tar.xz glibc-d5e8275481e57cc7f3bd6ba435a7bbced9b97202.zip |
Split _dl_writev out from _dl_debug_vdprintf.
Diffstat (limited to 'sysdeps')
-rw-r--r-- | sysdeps/unix/sysv/linux/dl-writev.h | 38 |
1 files changed, 38 insertions, 0 deletions
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 + <http://www.gnu.org/licenses/>. */ + +#include <sys/uio.h> +#include <sysdep.h> + +/* 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); +} |