diff options
| author | Alexander Graf <agraf@suse.de> | 2014-03-02 19:36:42 +0000 |
|---|---|---|
| committer | Riku Voipio <riku.voipio@linaro.org> | 2014-03-03 23:08:09 +0200 |
| commit | f19e00d776b781bfb0067b9b20a592440fd2990e (patch) | |
| tree | 5fdc95d88771c397087907a1bcf0016c53b25494 /linux-user/syscall_defs.h | |
| parent | 76ca310a19463e9883e2e55a88ac8be1fc171eea (diff) | |
linux-user: Implement sendmmsg syscall
Glibc when built for newer kernels assumes that the sendmmsg syscall is
available. Without it, dns resolution simply fails to work.
Wrap the syscall with existing infrastructure so that we don't have a host
dependency on sendmmsg.
To avoid locking the same area of guest memory twice (which will break if
DEBUG_REMAP is defined) we pull the lock/unlock part of do_sendrecvmsg()
out into its own function so the actual implementation can be shared.
Signed-off-by: Alexander Graf <agraf@suse.de>
[PMM: add recvmmsg support;
handle errors (which also implies support for non-blocking operations);
cap the vector length as the kernel implementation does;
don't lock guest memory twice;
support MSG_WAITFORONE flag]
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
Reviewed-by: Richard Henderson <rth@twiddle.net>
Diffstat (limited to 'linux-user/syscall_defs.h')
| -rw-r--r-- | linux-user/syscall_defs.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/linux-user/syscall_defs.h b/linux-user/syscall_defs.h index d55f396c9e..732c9e3dbb 100644 --- a/linux-user/syscall_defs.h +++ b/linux-user/syscall_defs.h @@ -240,6 +240,10 @@ __target_cmsg_nxthdr (struct target_msghdr *__mhdr, struct target_cmsghdr *__cms return __cmsg; } +struct target_mmsghdr { + struct target_msghdr msg_hdr; /* Message header */ + unsigned int msg_len; /* Number of bytes transmitted */ +}; struct target_rusage { struct target_timeval ru_utime; /* user time used */ |