Merge remote-tracking branch 'remotes/riku/tags/pull-linux-user-20160921' into staging

Linux-user changes, mostly bugfixes and adding support for some
new syscalls and some obscure syscalls as well. Includes some
missed patches from earlier rounds, and dropping unicore32 target.

v2: fix the syslog patch and test build with clang-3.8
v3: drop ustat patch

# gpg: Signature made Fri 21 Oct 2016 13:38:06 BST
# gpg:                using RSA key 0xB44890DEDE3C9BC0
# gpg: Good signature from "Riku Voipio <riku.voipio@iki.fi>"
# gpg:                 aka "Riku Voipio <riku.voipio@linaro.org>"
# Primary key fingerprint: FF82 03C8 C391 98AE 0581  41EF B448 90DE DE3C 9BC0

* remotes/riku/tags/pull-linux-user-20160921: (21 commits)
  linux-user: disable unicore32 linux-user build
  linux-user: added support for pwritev() system call.
  linux-user: added support for preadv() system call.
  linux-user: Fix fadvise64() syscall support for Mips32
  linux-user: Redirect termbits.h for Mips64 to termbits.h for Mips32
  linux-user: Update ioctls definitions for Mips32
  linux-user: Update mips_syscall_args[] array in main.c
  linux-user: Add support for syncfs() syscall
  linux-user: Add support for clock_adjtime() syscall
  linux-user: Fix definition of target_sigevent for 32-bit guests
  linux-user: use libc wrapper instead of direct mremap syscall
  linux-user: Don't use alloca() for epoll_wait's epoll event array
  linux-user: add RTA_PRIORITY in netlink
  linux-user: add kcmp() syscall
  linux-user: sparc64: Use correct target SHMLBA in shmat()
  linux-user: Remove a duplicate item from strace.list
  linux-user: Fix syslog() syscall support
  linux-user: Fix socketcall() syscall support
  linux-user: Fix msgrcv() and msgsnd() syscalls support
  linux-user: Fix mq_open() syscall support
  ...

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

12 files changed, 671 insertions, 383 deletions

diff --git a/configure b/configure
index dd9e6792bb..d3dafcbb37 100755
--- a/configure
+++ b/configure
@@ -3911,6 +3911,36 @@ if compile_prog "" "" ; then
   setns=yes
 fi
 
+# clock_adjtime probe
+clock_adjtime=no
+cat > $TMPC <<EOF
+#include <time.h>
+
+int main(void)
+{
+    return clock_adjtime(0, 0);
+}
+EOF
+clock_adjtime=no
+if compile_prog "" "" ; then
+  clock_adjtime=yes
+fi
+
+# syncfs probe
+syncfs=no
+cat > $TMPC <<EOF
+#include <unistd.h>
+
+int main(void)
+{
+    return syncfs(0);
+}
+EOF
+syncfs=no
+if compile_prog "" "" ; then
+  syncfs=yes
+fi
+
 # Check if tools are available to build documentation.
 if test "$docs" != "no" ; then
   if has makeinfo && has pod2man; then
@@ -5196,6 +5226,12 @@ fi
 if test "$setns" = "yes" ; then
   echo "CONFIG_SETNS=y" >> $config_host_mak
 fi
+if test "$clock_adjtime" = "yes" ; then
+  echo "CONFIG_CLOCK_ADJTIME=y" >> $config_host_mak
+fi
+if test "$syncfs" = "yes" ; then
+  echo "CONFIG_SYNCFS=y" >> $config_host_mak
+fi
 if test "$inotify" = "yes" ; then
   echo "CONFIG_INOTIFY=y" >> $config_host_mak
 fi
diff --git a/default-configs/unicore32-linux-user.mak b/default-configs/unicore32-linux-user.mak
deleted file mode 100644
index 6aafd21494..0000000000
--- a/default-configs/unicore32-linux-user.mak
+++ /dev/null
@@ -1 +0,0 @@
-# Default configuration for unicore32-linux-user
diff --git a/linux-user/main.c b/linux-user/main.c
index 0e31dad684..18d5a62a16 100644
--- a/linux-user/main.c
+++ b/linux-user/main.c
@@ -2295,8 +2295,8 @@ static const uint8_t mips_syscall_args[] = {
         MIPS_SYS(sys_dup3, 3)
         MIPS_SYS(sys_pipe2, 2)
         MIPS_SYS(sys_inotify_init1, 1)
-        MIPS_SYS(sys_preadv, 6)         /* 4330 */
-        MIPS_SYS(sys_pwritev, 6)
+        MIPS_SYS(sys_preadv, 5)         /* 4330 */
+        MIPS_SYS(sys_pwritev, 5)
         MIPS_SYS(sys_rt_tgsigqueueinfo, 4)
         MIPS_SYS(sys_perf_event_open, 5)
         MIPS_SYS(sys_accept4, 4)
@@ -2308,6 +2308,26 @@ static const uint8_t mips_syscall_args[] = {
         MIPS_SYS(sys_open_by_handle_at, 3) /* 4340 */
         MIPS_SYS(sys_clock_adjtime, 2)
         MIPS_SYS(sys_syncfs, 1)
+        MIPS_SYS(sys_sendmmsg, 4)
+        MIPS_SYS(sys_setns, 2)
+        MIPS_SYS(sys_process_vm_readv, 6) /* 345 */
+        MIPS_SYS(sys_process_vm_writev, 6)
+        MIPS_SYS(sys_kcmp, 5)
+        MIPS_SYS(sys_finit_module, 3)
+        MIPS_SYS(sys_sched_setattr, 2)
+        MIPS_SYS(sys_sched_getattr, 3)  /* 350 */
+        MIPS_SYS(sys_renameat2, 5)
+        MIPS_SYS(sys_seccomp, 3)
+        MIPS_SYS(sys_getrandom, 3)
+        MIPS_SYS(sys_memfd_create, 2)
+        MIPS_SYS(sys_bpf, 3)            /* 355 */
+        MIPS_SYS(sys_execveat, 5)
+        MIPS_SYS(sys_userfaultfd, 1)
+        MIPS_SYS(sys_membarrier, 2)
+        MIPS_SYS(sys_mlock2, 3)
+        MIPS_SYS(sys_copy_file_range, 6) /* 360 */
+        MIPS_SYS(sys_preadv2, 6)
+        MIPS_SYS(sys_pwritev2, 6)
 };
 #  undef MIPS_SYS
 # endif /* O32 */
diff --git a/linux-user/mips/syscall_nr.h b/linux-user/mips/syscall_nr.h
index 6819f865ed..ced32806ea 100644
--- a/linux-user/mips/syscall_nr.h
+++ b/linux-user/mips/syscall_nr.h
@@ -256,7 +256,7 @@
 #define TARGET_NR_remap_file_pages	(TARGET_NR_Linux + 251)
 #define TARGET_NR_set_tid_address	(TARGET_NR_Linux + 252)
 #define TARGET_NR_restart_syscall	(TARGET_NR_Linux + 253)
-#define TARGET_NR_fadvise64		(TARGET_NR_Linux + 254)
+#define TARGET_NR_fadvise64_64          (TARGET_NR_Linux + 254)
 #define TARGET_NR_statfs64		(TARGET_NR_Linux + 255)
 #define TARGET_NR_fstatfs64		(TARGET_NR_Linux + 256)
 #define TARGET_NR_timer_create		(TARGET_NR_Linux + 257)
diff --git a/linux-user/mips/termbits.h b/linux-user/mips/termbits.h
index d3a6cf8f91..a0bcad0946 100644
--- a/linux-user/mips/termbits.h
+++ b/linux-user/mips/termbits.h
@@ -219,8 +219,20 @@ struct target_termios {
 #define TARGET_TIOCSBRK	0x5427  /* BSD compatibility */
 #define TARGET_TIOCCBRK	0x5428  /* BSD compatibility */
 #define TARGET_TIOCGSID	0x7416  /* Return the session ID of FD */
+#define TARGET_TCGETS2          TARGET_IOR('T', 0x2A, struct termios2)
+#define TARGET_TCSETS2          TARGET_IOW('T', 0x2B, struct termios2)
+#define TARGET_TCSETSW2         TARGET_IOW('T', 0x2C, struct termios2)
+#define TARGET_TCSETSF2         TARGET_IOW('T', 0x2D, struct termios2)
+#define TARGET_TIOCGRS485       TARGET_IOR('T', 0x2E, struct serial_rs485)
+#define TARGET_TIOCSRS485       TARGET_IOWR('T', 0x2F, struct serial_rs485)
 #define TARGET_TIOCGPTN	TARGET_IOR('T',0x30, unsigned int) /* Get Pty Number (of pty-mux device) */
 #define TARGET_TIOCSPTLCK	TARGET_IOW('T',0x31, int)  /* Lock/unlock Pty */
+#define TARGET_TIOCGDEV         TARGET_IOR('T', 0x32, unsigned int)
+#define TARGET_TIOCSIG          TARGET_IOW('T', 0x36, int)
+#define TARGET_TIOCVHANGUP      0x5437
+#define TARGET_TIOCGPKT         TARGET_IOR('T', 0x38, int)
+#define TARGET_TIOCGPTLCK       TARGET_IOR('T', 0x39, int)
+#define TARGET_TIOCGEXCL        TARGET_IOR('T', 0x40, int)
 
 /* I hope the range from 0x5480 on is free ... */
 #define TARGET_TIOCSCTTY	0x5480		/* become controlling tty */
diff --git a/linux-user/mips64/termbits.h b/linux-user/mips64/termbits.h
index d3a6cf8f91..d0a271e1d4 100644
--- a/linux-user/mips64/termbits.h
+++ b/linux-user/mips64/termbits.h
@@ -1,245 +1,2 @@
-/* from asm/termbits.h */
+#include "../mips/termbits.h"
 
-#define TARGET_NCCS 23
-
-struct target_termios {
-    unsigned int c_iflag;               /* input mode flags */
-    unsigned int c_oflag;               /* output mode flags */
-    unsigned int c_cflag;               /* control mode flags */
-    unsigned int c_lflag;               /* local mode flags */
-    unsigned char c_line;                    /* line discipline */
-    unsigned char c_cc[TARGET_NCCS];                /* control characters */
-};
-
-/* c_iflag bits */
-#define TARGET_IGNBRK  0000001
-#define TARGET_BRKINT  0000002
-#define TARGET_IGNPAR  0000004
-#define TARGET_PARMRK  0000010
-#define TARGET_INPCK   0000020
-#define TARGET_ISTRIP  0000040
-#define TARGET_INLCR   0000100
-#define TARGET_IGNCR   0000200
-#define TARGET_ICRNL   0000400
-#define TARGET_IUCLC   0001000
-#define TARGET_IXON    0002000
-#define TARGET_IXANY   0004000
-#define TARGET_IXOFF   0010000
-#define TARGET_IMAXBEL 0020000
-#define TARGET_IUTF8   0040000
-
-/* c_oflag bits */
-#define TARGET_OPOST   0000001
-#define TARGET_OLCUC   0000002
-#define TARGET_ONLCR   0000004
-#define TARGET_OCRNL   0000010
-#define TARGET_ONOCR   0000020
-#define TARGET_ONLRET  0000040
-#define TARGET_OFILL   0000100
-#define TARGET_OFDEL   0000200
-#define TARGET_NLDLY   0000400
-#define   TARGET_NL0   0000000
-#define   TARGET_NL1   0000400
-#define TARGET_CRDLY   0003000
-#define   TARGET_CR0   0000000
-#define   TARGET_CR1   0001000
-#define   TARGET_CR2   0002000
-#define   TARGET_CR3   0003000
-#define TARGET_TABDLY  0014000
-#define   TARGET_TAB0  0000000
-#define   TARGET_TAB1  0004000
-#define   TARGET_TAB2  0010000
-#define   TARGET_TAB3  0014000
-#define   TARGET_XTABS 0014000
-#define TARGET_BSDLY   0020000
-#define   TARGET_BS0   0000000
-#define   TARGET_BS1   0020000
-#define TARGET_VTDLY   0040000
-#define   TARGET_VT0   0000000
-#define   TARGET_VT1   0040000
-#define TARGET_FFDLY   0100000
-#define   TARGET_FF0   0000000
-#define   TARGET_FF1   0100000
-
-/* c_cflag bit meaning */
-#define TARGET_CBAUD   0010017
-#define  TARGET_B0     0000000         /* hang up */
-#define  TARGET_B50    0000001
-#define  TARGET_B75    0000002
-#define  TARGET_B110   0000003
-#define  TARGET_B134   0000004
-#define  TARGET_B150   0000005
-#define  TARGET_B200   0000006
-#define  TARGET_B300   0000007
-#define  TARGET_B600   0000010
-#define  TARGET_B1200  0000011
-#define  TARGET_B1800  0000012
-#define  TARGET_B2400  0000013
-#define  TARGET_B4800  0000014
-#define  TARGET_B9600  0000015
-#define  TARGET_B19200 0000016
-#define  TARGET_B38400 0000017
-#define TARGET_EXTA B19200
-#define TARGET_EXTB B38400
-#define TARGET_CSIZE   0000060
-#define   TARGET_CS5   0000000
-#define   TARGET_CS6   0000020
-#define   TARGET_CS7   0000040
-#define   TARGET_CS8   0000060
-#define TARGET_CSTOPB  0000100
-#define TARGET_CREAD   0000200
-#define TARGET_PARENB  0000400
-#define TARGET_PARODD  0001000
-#define TARGET_HUPCL   0002000
-#define TARGET_CLOCAL  0004000
-#define TARGET_CBAUDEX 0010000
-#define  TARGET_BOTHER   0010000
-#define  TARGET_B57600   0010001
-#define  TARGET_B115200  0010002
-#define  TARGET_B230400  0010003
-#define  TARGET_B460800  0010004
-#define  TARGET_B500000  0010005
-#define  TARGET_B576000  0010006
-#define  TARGET_B921600  0010007
-#define  TARGET_B1000000 0010010
-#define  TARGET_B1152000 0010011
-#define  TARGET_B1500000 0010012
-#define  TARGET_B2000000 0010013
-#define  TARGET_B2500000 0010014
-#define  TARGET_B3000000 0010015
-#define  TARGET_B3500000 0010016
-#define  TARGET_B4000000 0010017
-#define TARGET_CIBAUD    002003600000  /* input baud rate (not used) */
-#define TARGET_CMSPAR    010000000000  /* mark or space (stick) parity */
-#define TARGET_CRTSCTS   020000000000  /* flow control */
-
-/* c_lflag bits */
-#define TARGET_ISIG    0000001
-#define TARGET_ICANON  0000002
-#define TARGET_XCASE   0000004
-#define TARGET_ECHO    0000010
-#define TARGET_ECHOE   0000020
-#define TARGET_ECHOK   0000040
-#define TARGET_ECHONL  0000100
-#define TARGET_NOFLSH  0000200
-#define TARGET_IEXTEN  0000400
-#define TARGET_ECHOCTL 0001000
-#define TARGET_ECHOPRT 0002000
-#define TARGET_ECHOKE  0004000
-#define TARGET_FLUSHO  0010000
-#define TARGET_PENDIN  0040000
-#define TARGET_TOSTOP  0100000
-#define TARGET_ITOSTOP TARGET_TOSTOP
-
-/* c_cc character offsets */
-#define TARGET_VINTR	0
-#define TARGET_VQUIT	1
-#define TARGET_VERASE	2
-#define TARGET_VKILL	3
-#define TARGET_VMIN	4
-#define TARGET_VTIME	5
-#define TARGET_VEOL2	6
-#define TARGET_VSWTC	7
-#define TARGET_VSTART	8
-#define TARGET_VSTOP	9
-#define TARGET_VSUSP	10
-/* VDSUSP not supported */
-#define TARGET_VREPRINT	12
-#define TARGET_VDISCARD	13
-#define TARGET_VWERASE	14
-#define TARGET_VLNEXT	15
-#define TARGET_VEOF	16
-#define TARGET_VEOL	17
-
-/* ioctls */
-
-#define TARGET_TCGETA		0x5401
-#define TARGET_TCSETA		0x5402	/* Clashes with SNDCTL_TMR_START sound ioctl */
-#define TARGET_TCSETAW		0x5403
-#define TARGET_TCSETAF		0x5404
-
-#define TARGET_TCSBRK		0x5405
-#define TARGET_TCXONC		0x5406
-#define TARGET_TCFLSH		0x5407
-
-#define TARGET_TCGETS		0x540d
-#define TARGET_TCSETS		0x540e
-#define TARGET_TCSETSW		0x540f
-#define TARGET_TCSETSF		0x5410
-
-#define TARGET_TIOCEXCL	0x740d		/* set exclusive use of tty */
-#define TARGET_TIOCNXCL	0x740e		/* reset exclusive use of tty */
-#define TARGET_TIOCOUTQ	0x7472		/* output queue size */
-#define TARGET_TIOCSTI	0x5472		/* simulate terminal input */
-#define TARGET_TIOCMGET	0x741d		/* get all modem bits */
-#define TARGET_TIOCMBIS	0x741b		/* bis modem bits */
-#define TARGET_TIOCMBIC	0x741c		/* bic modem bits */
-#define TARGET_TIOCMSET	0x741a		/* set all modem bits */
-#define TARGET_TIOCPKT		0x5470		/* pty: set/clear packet mode */
-#define	 TARGET_TIOCPKT_DATA		0x00	/* data packet */
-#define	 TARGET_TIOCPKT_FLUSHREAD	0x01	/* flush packet */
-#define	 TARGET_TIOCPKT_FLUSHWRITE	0x02	/* flush packet */
-#define	 TARGET_TIOCPKT_STOP		0x04	/* stop output */
-#define	 TARGET_TIOCPKT_START		0x08	/* start output */
-#define	 TARGET_TIOCPKT_NOSTOP		0x10	/* no more ^S, ^Q */
-#define	 TARGET_TIOCPKT_DOSTOP		0x20	/* now do ^S ^Q */
-/* #define  TIOCPKT_IOCTL		0x40	state change of pty driver */
-#define TARGET_TIOCSWINSZ	TARGET_IOW('t', 103, struct winsize)	/* set window size */
-#define TARGET_TIOCGWINSZ	TARGET_IOR('t', 104, struct winsize)	/* get window size */
-#define TARGET_TIOCNOTTY	0x5471		/* void tty association */
-#define TARGET_TIOCSETD	0x7401
-#define TARGET_TIOCGETD	0x7400
-
-#define TARGET_FIOCLEX		0x6601
-#define TARGET_FIONCLEX	0x6602
-#define TARGET_FIOASYNC	0x667d
-#define TARGET_FIONBIO		0x667e
-#define TARGET_FIOQSIZE	0x667f
-
-#define TARGET_TIOCGLTC	0x7474			/* get special local chars */
-#define TARGET_TIOCSLTC	0x7475			/* set special local chars */
-#define TARGET_TIOCSPGRP	TARGET_IOW('t', 118, int)	/* set pgrp of tty */
-#define TARGET_TIOCGPGRP	TARGET_IOR('t', 119, int)	/* get pgrp of tty */
-#define TARGET_TIOCCONS	TARGET_IOW('t', 120, int)	/* become virtual console */
-
-#define TARGET_FIONREAD	0x467f
-#define TARGET_TIOCINQ		TARGET_FIONREAD
-
-#define TARGET_TIOCGETP        0x7408
-#define TARGET_TIOCSETP        0x7409
-#define TARGET_TIOCSETN        0x740a			/* TIOCSETP wo flush */
-
-/* #define TARGET_TIOCSETA	TARGET_IOW('t', 20, struct termios) set termios struct */
-/* #define TARGET_TIOCSETAW	TARGET_IOW('t', 21, struct termios) drain output, set */
-/* #define TARGET_TIOCSETAF	TARGET_IOW('t', 22, struct termios) drn out, fls in, set */
-/* #define TARGET_TIOCGETD	TARGET_IOR('t', 26, int)	get line discipline */
-/* #define TARGET_TIOCSETD	TARGET_IOW('t', 27, int)	set line discipline */
-						/* 127-124 compat */
-
-#define TARGET_TIOCSBRK	0x5427  /* BSD compatibility */
-#define TARGET_TIOCCBRK	0x5428  /* BSD compatibility */
-#define TARGET_TIOCGSID	0x7416  /* Return the session ID of FD */
-#define TARGET_TIOCGPTN	TARGET_IOR('T',0x30, unsigned int) /* Get Pty Number (of pty-mux device) */
-#define TARGET_TIOCSPTLCK	TARGET_IOW('T',0x31, int)  /* Lock/unlock Pty */
-
-/* I hope the range from 0x5480 on is free ... */
-#define TARGET_TIOCSCTTY	0x5480		/* become controlling tty */
-#define TARGET_TIOCGSOFTCAR	0x5481
-#define TARGET_TIOCSSOFTCAR	0x5482
-#define TARGET_TIOCLINUX	0x5483
-#define TARGET_TIOCGSERIAL	0x5484
-#define TARGET_TIOCSSERIAL	0x5485
-#define TARGET_TCSBRKP		0x5486	/* Needed for POSIX tcsendbreak() */
-#define TARGET_TIOCSERCONFIG	0x5488
-#define TARGET_TIOCSERGWILD	0x5489
-#define TARGET_TIOCSERSWILD	0x548a
-#define TARGET_TIOCGLCKTRMIOS	0x548b
-#define TARGET_TIOCSLCKTRMIOS	0x548c
-#define TARGET_TIOCSERGSTRUCT	0x548d /* For debugging only */
-#define TARGET_TIOCSERGETLSR   0x548e /* Get line status register */
-#define TARGET_TIOCSERGETMULTI 0x548f /* Get multiport config  */
-#define TARGET_TIOCSERSETMULTI 0x5490 /* Set multiport config */
-#define TARGET_TIOCMIWAIT      0x5491 /* wait for a change on serial input line(s) */
-#define TARGET_TIOCGICOUNT     0x5492 /* read serial port inline interrupt counts */
-#define TARGET_TIOCGHAYESESP	0x5493 /* Get Hayes ESP configuration */
-#define TARGET_TIOCSHAYESESP	0x5494 /* Set Hayes ESP configuration */
diff --git a/linux-user/mmap.c b/linux-user/mmap.c
index c4371d943a..ffd099dfe7 100644
--- a/linux-user/mmap.c
+++ b/linux-user/mmap.c
@@ -17,8 +17,6 @@
  *  along with this program; if not, see <http://www.gnu.org/licenses/>.
  */
 #include "qemu/osdep.h"
-#include <linux/mman.h>
-#include <linux/unistd.h>
 
 #include "qemu.h"
 #include "qemu-common.h"
@@ -681,10 +679,8 @@ abi_long target_mremap(abi_ulong old_addr, abi_ulong old_size,
     mmap_lock();
 
     if (flags & MREMAP_FIXED) {
-        host_addr = (void *) syscall(__NR_mremap, g2h(old_addr),
-                                     old_size, new_size,
-                                     flags,
-                                     g2h(new_addr));
+        host_addr = mremap(g2h(old_addr), old_size, new_size,
+                           flags, g2h(new_addr));
 
         if (reserved_va && host_addr != MAP_FAILED) {
             /* If new and old addresses overlap then the above mremap will
@@ -700,10 +696,8 @@ abi_long target_mremap(abi_ulong old_addr, abi_ulong old_size,
             errno = ENOMEM;
             host_addr = MAP_FAILED;
         } else {
-            host_addr = (void *) syscall(__NR_mremap, g2h(old_addr),
-                                         old_size, new_size,
-                                         flags | MREMAP_FIXED,
-                                         g2h(mmap_start));
+            host_addr = mremap(g2h(old_addr), old_size, new_size,
+                               flags | MREMAP_FIXED, g2h(mmap_start));
             if (reserved_va) {
                 mmap_reserve(old_addr, old_size);
             }
diff --git a/linux-user/sparc64/target_syscall.h b/linux-user/sparc64/target_syscall.h
index b7e3bf82fb..2cbbaaed1b 100644
--- a/linux-user/sparc64/target_syscall.h
+++ b/linux-user/sparc64/target_syscall.h
@@ -23,4 +23,11 @@ struct target_pt_regs {
 #define TARGET_MLOCKALL_MCL_CURRENT 0x2000
 #define TARGET_MLOCKALL_MCL_FUTURE  0x4000
 
+#define TARGET_FORCE_SHMLBA
+
+static inline abi_ulong target_shmlba(CPUSPARCState *env)
+{
+    return MAX(TARGET_PAGE_SIZE, 16 * 1024);
+}
+
 #endif /* SPARC64_TARGET_SYSCALL_H */
diff --git a/linux-user/strace.c b/linux-user/strace.c
index 1e5136098e..489dbc9583 100644
--- a/linux-user/strace.c
+++ b/linux-user/strace.c
@@ -435,6 +435,69 @@ print_fdset(int n, abi_ulong target_fds_addr)
 }
 #endif
 
+#ifdef TARGET_NR_clock_adjtime
+/* IDs of the various system clocks */
+#define TARGET_CLOCK_REALTIME              0
+#define TARGET_CLOCK_MONOTONIC             1
+#define TARGET_CLOCK_PROCESS_CPUTIME_ID    2
+#define TARGET_CLOCK_THREAD_CPUTIME_ID     3
+#define TARGET_CLOCK_MONOTONIC_RAW         4
+#define TARGET_CLOCK_REALTIME_COARSE       5
+#define TARGET_CLOCK_MONOTONIC_COARSE      6
+#define TARGET_CLOCK_BOOTTIME              7
+#define TARGET_CLOCK_REALTIME_ALARM        8
+#define TARGET_CLOCK_BOOTTIME_ALARM        9
+#define TARGET_CLOCK_SGI_CYCLE             10
+#define TARGET_CLOCK_TAI                   11
+
+static void
+print_clockid(int clockid, int last)
+{
+    switch (clockid) {
+    case TARGET_CLOCK_REALTIME:
+        gemu_log("CLOCK_REALTIME");
+        break;
+    case TARGET_CLOCK_MONOTONIC:
+        gemu_log("CLOCK_MONOTONIC");
+        break;
+    case TARGET_CLOCK_PROCESS_CPUTIME_ID:
+        gemu_log("CLOCK_PROCESS_CPUTIME_ID");
+        break;
+    case TARGET_CLOCK_THREAD_CPUTIME_ID:
+        gemu_log("CLOCK_THREAD_CPUTIME_ID");
+        break;
+    case TARGET_CLOCK_MONOTONIC_RAW:
+        gemu_log("CLOCK_MONOTONIC_RAW");
+        break;
+    case TARGET_CLOCK_REALTIME_COARSE:
+        gemu_log("CLOCK_REALTIME_COARSE");
+        break;
+    case TARGET_CLOCK_MONOTONIC_COARSE:
+        gemu_log("CLOCK_MONOTONIC_COARSE");
+        break;
+    case TARGET_CLOCK_BOOTTIME:
+        gemu_log("CLOCK_BOOTTIME");
+        break;
+    case TARGET_CLOCK_REALTIME_ALARM:
+        gemu_log("CLOCK_REALTIME_ALARM");
+        break;
+    case TARGET_CLOCK_BOOTTIME_ALARM:
+        gemu_log("CLOCK_BOOTTIME_ALARM");
+        break;
+    case TARGET_CLOCK_SGI_CYCLE:
+        gemu_log("CLOCK_SGI_CYCLE");
+        break;
+    case TARGET_CLOCK_TAI:
+        gemu_log("CLOCK_TAI");
+        break;
+    default:
+        gemu_log("%d", clockid);
+        break;
+    }
+    gemu_log("%s", get_comma(last));
+}
+#endif
+
 /*
  * Sysycall specific output functions
  */
@@ -577,6 +640,52 @@ print_syscall_ret_newselect(const struct syscallname *name, abi_long ret)
 }
 #endif
 
+/* special meanings of adjtimex()' non-negative return values */
+#define TARGET_TIME_OK       0   /* clock synchronized, no leap second */
+#define TARGET_TIME_INS      1   /* insert leap second */
+#define TARGET_TIME_DEL      2   /* delete leap second */
+#define TARGET_TIME_OOP      3   /* leap second in progress */
+#define TARGET_TIME_WAIT     4   /* leap second has occurred */
+#define TARGET_TIME_ERROR    5   /* clock not synchronized */
+static void
+print_syscall_ret_adjtimex(const struct syscallname *name, abi_long ret)
+{
+    const char *errstr = NULL;
+
+    gemu_log(" = ");
+    if (ret < 0) {
+        gemu_log("-1 errno=%d", errno);
+        errstr = target_strerror(-ret);
+        if (errstr) {
+            gemu_log(" (%s)", errstr);
+        }
+    } else {
+        gemu_log(TARGET_ABI_FMT_ld, ret);
+        switch (ret) {
+        case TARGET_TIME_OK:
+            gemu_log(" TIME_OK (clock synchronized, no leap second)");
+            break;
+        case TARGET_TIME_INS:
+            gemu_log(" TIME_INS (insert leap second)");
+            break;
+        case TARGET_TIME_DEL:
+            gemu_log(" TIME_DEL (delete leap second)");
+            break;
+        case TARGET_TIME_OOP:
+            gemu_log(" TIME_OOP (leap second in progress)");
+            break;
+        case TARGET_TIME_WAIT:
+            gemu_log(" TIME_WAIT (leap second has occurred)");
+            break;
+        case TARGET_TIME_ERROR:
+            gemu_log(" TIME_ERROR (clock not synchronized)");
+            break;
+        }
+    }
+
+    gemu_log("\n");
+}
+
 UNUSED static struct flags access_flags[] = {
     FLAG_GENERIC(F_OK),
     FLAG_GENERIC(R_OK),
@@ -1050,6 +1159,19 @@ print_chmod(const struct syscallname *name,
 }
 #endif
 
+#ifdef TARGET_NR_clock_adjtime
+static void
+print_clock_adjtime(const struct syscallname *name,
+    abi_long arg0, abi_long arg1, abi_long arg2,
+    abi_long arg3, abi_long arg4, abi_long arg5)
+{
+    print_syscall_prologue(name);
+    print_clockid(arg0, 0);
+    print_pointer(arg1, 1);
+    print_syscall_epilogue(name);
+}
+#endif
+
 #ifdef TARGET_NR_clone
 static void do_print_clone(unsigned int flags, abi_ulong newsp,
                            abi_ulong parent_tidptr, target_ulong newtls,
@@ -1629,29 +1751,32 @@ print_optint:
 }
 
 #define PRINT_SOCKOP(name, func) \
-    [SOCKOP_##name] = { #name, func }
+    [TARGET_SYS_##name] = { #name, func }
 
 static struct {
     const char *name;
     void (*print)(const char *, abi_long);
 } scall[] = {
-    PRINT_SOCKOP(socket, do_print_socket),
-    PRINT_SOCKOP(bind, do_print_sockaddr),
-    PRINT_SOCKOP(connect, do_print_sockaddr),
-    PRINT_SOCKOP(listen, do_print_listen),
-    PRINT_SOCKOP(accept, do_print_sockaddr),
-    PRINT_SOCKOP(getsockname, do_print_sockaddr),
-    PRINT_SOCKOP(getpeername, do_print_sockaddr),
-    PRINT_SOCKOP(socketpair, do_print_socketpair),
-    PRINT_SOCKOP(send, do_print_sendrecv),
-    PRINT_SOCKOP(recv, do_print_sendrecv),
-    PRINT_SOCKOP(sendto, do_print_msgaddr),
-    PRINT_SOCKOP(recvfrom, do_print_msgaddr),
-    PRINT_SOCKOP(shutdown, do_print_shutdown),
-    PRINT_SOCKOP(sendmsg, do_print_msg),
-    PRINT_SOCKOP(recvmsg, do_print_msg),
-    PRINT_SOCKOP(setsockopt, do_print_sockopt),
-    PRINT_SOCKOP(getsockopt, do_print_sockopt),
+    PRINT_SOCKOP(SOCKET, do_print_socket),
+    PRINT_SOCKOP(BIND, do_print_sockaddr),
+    PRINT_SOCKOP(CONNECT, do_print_sockaddr),
+    PRINT_SOCKOP(LISTEN, do_print_listen),
+    PRINT_SOCKOP(ACCEPT, do_print_sockaddr),
+    PRINT_SOCKOP(GETSOCKNAME, do_print_sockaddr),
+    PRINT_SOCKOP(GETPEERNAME, do_print_sockaddr),
+    PRINT_SOCKOP(SOCKETPAIR, do_print_socketpair),
+    PRINT_SOCKOP(SEND, do_print_sendrecv),
+    PRINT_SOCKOP(RECV, do_print_sendrecv),
+    PRINT_SOCKOP(SENDTO, do_print_msgaddr),
+    PRINT_SOCKOP(RECVFROM, do_print_msgaddr),
+    PRINT_SOCKOP(SHUTDOWN, do_print_shutdown),
+    PRINT_SOCKOP(SETSOCKOPT, do_print_sockopt),
+    PRINT_SOCKOP(GETSOCKOPT, do_print_sockopt),
+    PRINT_SOCKOP(SENDMSG, do_print_msg),
+    PRINT_SOCKOP(RECVMSG, do_print_msg),
+    PRINT_SOCKOP(ACCEPT4, NULL),
+    PRINT_SOCKOP(RECVMMSG, NULL),
+    PRINT_SOCKOP(SENDMMSG, NULL),
 };
 
 static void
@@ -1778,6 +1903,78 @@ print_rt_sigprocmask(const struct syscallname *name,
 }
 #endif
 
+#ifdef TARGET_NR_syslog
+static void
+print_syslog_action(abi_ulong arg, int last)
+{
+    const char *type;
+
+    switch (arg) {
+        case TARGET_SYSLOG_ACTION_CLOSE: {
+            type = "SYSLOG_ACTION_CLOSE";
+            break;
+        }
+        case TARGET_SYSLOG_ACTION_OPEN: {
+            type = "SYSLOG_ACTION_OPEN";
+            break;
+        }
+        case TARGET_SYSLOG_ACTION_READ: {
+            type = "SYSLOG_ACTION_READ";
+            break;
+        }
+        case TARGET_SYSLOG_ACTION_READ_ALL: {
+            type = "SYSLOG_ACTION_READ_ALL";
+            break;
+        }
+        case TARGET_SYSLOG_ACTION_READ_CLEAR: {
+            type = "SYSLOG_ACTION_READ_CLEAR";
+            break;
+        }
+        case TARGET_SYSLOG_ACTION_CLEAR: {
+            type = "SYSLOG_ACTION_CLEAR";
+            break;
+        }
+        case TARGET_SYSLOG_ACTION_CONSOLE_OFF: {
+            type = "SYSLOG_ACTION_CONSOLE_OFF";
+            break;
+        }
+        case TARGET_SYSLOG_ACTION_CONSOLE_ON: {
+            type = "SYSLOG_ACTION_CONSOLE_ON";
+            break;
+        }
+        case TARGET_SYSLOG_ACTION_CONSOLE_LEVEL: {
+            type = "SYSLOG_ACTION_CONSOLE_LEVEL";
+            break;
+        }
+        case TARGET_SYSLOG_ACTION_SIZE_UNREAD: {
+            type = "SYSLOG_ACTION_SIZE_UNREAD";
+            break;
+        }
+        case TARGET_SYSLOG_ACTION_SIZE_BUFFER: {
+            type = "SYSLOG_ACTION_SIZE_BUFFER";
+            break;
+        }
+        default: {
+            print_raw_param("%ld", arg, last);
+            return;
+        }
+    }
+    gemu_log("%s%s", type, get_comma(last));
+}
+
+static void
+print_syslog(const struct syscallname *name,
+    abi_long arg0, abi_long arg1, abi_long arg2,
+    abi_long arg3, abi_long arg4, abi_long arg5)
+{
+    print_syscall_prologue(name);
+    print_syslog_action(arg0, 0);
+    print_pointer(arg1, 0);
+    print_raw_param("%d", arg2, 1);
+    print_syscall_epilogue(name);
+}
+#endif
+
 #ifdef TARGET_NR_mknod
 static void
 print_mknod(const struct syscallname *name,
diff --git a/linux-user/strace.list b/linux-user/strace.list
index 608f7e0932..3b1282ec1a 100644
--- a/linux-user/strace.list
+++ b/linux-user/strace.list
@@ -19,7 +19,8 @@
 { TARGET_NR_add_key, "add_key" , NULL, NULL, NULL },
 #endif
 #ifdef TARGET_NR_adjtimex
-{ TARGET_NR_adjtimex, "adjtimex" , NULL, NULL, NULL },
+{ TARGET_NR_adjtimex, "adjtimex" , "%s(%p)", NULL,
+                      print_syscall_ret_adjtimex },
 #endif
 #ifdef TARGET_NR_afs_syscall
 { TARGET_NR_afs_syscall, "afs_syscall" , NULL, NULL, NULL },
@@ -78,6 +79,9 @@
 #ifdef TARGET_NR_chroot
 { TARGET_NR_chroot, "chroot" , NULL, NULL, NULL },
 #endif
+#ifdef TARGET_NR_clock_adjtime
+{ TARGET_NR_clock_adjtime, "clock_adjtime" , NULL, print_clock_adjtime, NULL },
+#endif
 #ifdef TARGET_NR_clock_getres
 { TARGET_NR_clock_getres, "clock_getres" , NULL, NULL, NULL },
 #endif
@@ -1454,11 +1458,8 @@
 #ifdef TARGET_NR_sync
 { TARGET_NR_sync, "sync" , NULL, NULL, NULL },
 #endif
-#ifdef TARGET_NR_sync_file_range
-{ TARGET_NR_sync_file_range, "sync_file_range" , NULL, NULL, NULL },
-#endif
 #ifdef TARGET_NR_syncfs
-{ TARGET_NR_syncfs, "syncfs" , NULL, NULL, NULL },
+{ TARGET_NR_syncfs, "syncfs" , "%s(%d)", NULL, NULL },
 #endif
 #ifdef TARGET_NR_syscall
 { TARGET_NR_syscall, "syscall" , NULL, NULL, NULL },
@@ -1485,7 +1486,7 @@
 { TARGET_NR_sys_kexec_load, "sys_kexec_load" , NULL, NULL, NULL },
 #endif
 #ifdef TARGET_NR_syslog
-{ TARGET_NR_syslog, "syslog" , NULL, NULL, NULL },
+{ TARGET_NR_syslog, "syslog" , NULL, print_syslog, NULL },
 #endif
 #ifdef TARGET_NR_sysmips
 { TARGET_NR_sysmips, "sysmips" , NULL, NULL, NULL },
diff --git a/linux-user/syscall.c b/linux-user/syscall.c
index 03339ba0de..db697c0bf3 100644
--- a/linux-user/syscall.c
+++ b/linux-user/syscall.c
@@ -35,6 +35,7 @@
 #include <sys/swap.h>
 #include <linux/capability.h>
 #include <sched.h>
+#include <sys/timex.h>
 #ifdef __ia64__
 int __clone2(int (*fn)(void *), void *child_stack_base,
              size_t stack_size, int flags, void *arg, ...);
@@ -47,6 +48,7 @@ int __clone2(int (*fn)(void *), void *child_stack_base,
 #include <sys/shm.h>
 #include <sys/sem.h>
 #include <sys/statfs.h>
+#include <time.h>
 #include <utime.h>
 #include <sys/sysinfo.h>
 #include <sys/signalfd.h>
@@ -304,6 +306,11 @@ _syscall3(int, ioprio_set, int, which, int, who, int, ioprio)
 _syscall3(int, getrandom, void *, buf, size_t, buflen, unsigned int, flags)
 #endif
 
+#if defined(TARGET_NR_kcmp) && defined(__NR_kcmp)
+_syscall5(int, kcmp, pid_t, pid1, pid_t, pid2, int, type,
+          unsigned long, idx1, unsigned long, idx2)
+#endif
+
 static bitmask_transtbl fcntl_flags_tbl[] = {
   { TARGET_O_ACCMODE,   TARGET_O_WRONLY,    O_ACCMODE,   O_WRONLY,    },
   { TARGET_O_ACCMODE,   TARGET_O_RDWR,      O_ACCMODE,   O_RDWR,      },
@@ -788,6 +795,9 @@ static uint16_t host_to_target_errno_table[ERRNO_TABLE_SIZE] = {
 #ifdef ENOTRECOVERABLE
     [ENOTRECOVERABLE]	= TARGET_ENOTRECOVERABLE,
 #endif
+#ifdef ENOMSG
+    [ENOMSG]            = TARGET_ENOMSG,
+#endif
 };
 
 static inline int host_to_target_errno(int err)
@@ -908,6 +918,10 @@ safe_syscall2(int, tkill, int, tid, int, sig)
 safe_syscall3(int, tgkill, int, tgid, int, pid, int, sig)
 safe_syscall3(ssize_t, readv, int, fd, const struct iovec *, iov, int, iovcnt)
 safe_syscall3(ssize_t, writev, int, fd, const struct iovec *, iov, int, iovcnt)
+safe_syscall5(ssize_t, preadv, int, fd, const struct iovec *, iov, int, iovcnt,
+              unsigned long, pos_l, unsigned long, pos_h)
+safe_syscall5(ssize_t, pwritev, int, fd, const struct iovec *, iov, int, iovcnt,
+              unsigned long, pos_l, unsigned long, pos_h)
 safe_syscall3(int, connect, int, fd, const struct sockaddr *, addr,
               socklen_t, addrlen)
 safe_syscall6(ssize_t, sendto, int, fd, const void *, buf, size_t, len,
@@ -2591,6 +2605,7 @@ static abi_long target_to_host_data_route_rtattr(struct rtattr *rtattr)
     case RTA_GATEWAY:
         break;
     /* u32 */
+    case RTA_PRIORITY:
     case RTA_OIF:
         u32 = RTA_DATA(rtattr);
         *u32 = tswap32(*u32);
@@ -3893,89 +3908,94 @@ fail:
 }
 
 #ifdef TARGET_NR_socketcall
-/* do_socketcall() Must return target values and target errnos. */
+/* do_socketcall() must return target values and target errnos. */
 static abi_long do_socketcall(int num, abi_ulong vptr)
 {
-    static const unsigned ac[] = { /* number of arguments per call */
-        [SOCKOP_socket] = 3,      /* domain, type, protocol */
-        [SOCKOP_bind] = 3,        /* sockfd, addr, addrlen */
-        [SOCKOP_connect] = 3,     /* sockfd, addr, addrlen */
-        [SOCKOP_listen] = 2,      /* sockfd, backlog */
-        [SOCKOP_accept] = 3,      /* sockfd, addr, addrlen */
-        [SOCKOP_accept4] = 4,     /* sockfd, addr, addrlen, flags */
-        [SOCKOP_getsockname] = 3, /* sockfd, addr, addrlen */
-        [SOCKOP_getpeername] = 3, /* sockfd, addr, addrlen */
-        [SOCKOP_socketpair] = 4,  /* domain, type, protocol, tab */
-        [SOCKOP_send] = 4,        /* sockfd, msg, len, flags */
-        [SOCKOP_recv] = 4,        /* sockfd, msg, len, flags */
-        [SOCKOP_sendto] = 6,      /* sockfd, msg, len, flags, addr, addrlen */
-        [SOCKOP_recvfrom] = 6,    /* sockfd, msg, len, flags, addr, addrlen */
-        [SOCKOP_shutdown] = 2,    /* sockfd, how */
-        [SOCKOP_sendmsg] = 3,     /* sockfd, msg, flags */
-        [SOCKOP_recvmsg] = 3,     /* sockfd, msg, flags */
-        [SOCKOP_sendmmsg] = 4,    /* sockfd, msgvec, vlen, flags */
-        [SOCKOP_recvmmsg] = 4,    /* sockfd, msgvec, vlen, flags */
-        [SOCKOP_setsockopt] = 5,  /* sockfd, level, optname, optval, optlen */
-        [SOCKOP_getsockopt] = 5,  /* sockfd, level, optname, optval, optlen */
+    static const unsigned nargs[] = { /* number of arguments per operation */
+        [TARGET_SYS_SOCKET] = 3,      /* domain, type, protocol */
+        [TARGET_SYS_BIND] = 3,        /* fd, addr, addrlen */
+        [TARGET_SYS_CONNECT] = 3,     /* fd, addr, addrlen */
+        [TARGET_SYS_LISTEN] = 2,      /* fd, backlog */
+        [TARGET_SYS_ACCEPT] = 3,      /* fd, addr, addrlen */
+        [TARGET_SYS_GETSOCKNAME] = 3, /* fd, addr, addrlen */
+        [TARGET_SYS_GETPEERNAME] = 3, /* fd, addr, addrlen */
+        [TARGET_SYS_SOCKETPAIR] = 4,  /* domain, type, protocol, tab */
+        [TARGET_SYS_SEND] = 4,        /* fd, msg, len, flags */
+        [TARGET_SYS_RECV] = 4,        /* fd, msg, len, flags */
+        [TARGET_SYS_SENDTO] = 6,      /* fd, msg, len, flags, addr, addrlen */
+        [TARGET_SYS_RECVFROM] = 6,    /* fd, msg, len, flags, addr, addrlen */
+        [TARGET_SYS_SHUTDOWN] = 2,    /* fd, how */
+        [TARGET_SYS_SETSOCKOPT] = 5,  /* fd, level, optname, optval, optlen */
+        [TARGET_SYS_GETSOCKOPT] = 5,  /* fd, level, optname, optval, optlen */
+        [TARGET_SYS_SENDMSG] = 3,     /* fd, msg, flags */
+        [TARGET_SYS_RECVMSG] = 3,     /* fd, msg, flags */
+        [TARGET_SYS_ACCEPT4] = 4,     /* fd, addr, addrlen, flags */
+        [TARGET_SYS_RECVMMSG] = 4,    /* fd, msgvec, vlen, flags */
+        [TARGET_SYS_SENDMMSG] = 4,    /* fd, msgvec, vlen, flags */
     };
     abi_long a[6]; /* max 6 args */
+    unsigned i;
 
-    /* first, collect the arguments in a[] according to ac[] */
-    if (num >= 0 && num < ARRAY_SIZE(ac)) {
-        unsigned i;
-        assert(ARRAY_SIZE(a) >= ac[num]); /* ensure we have space for args */
-        for (i = 0; i < ac[num]; ++i) {
-            if (get_user_ual(a[i], vptr + i * sizeof(abi_long)) != 0) {
-                return -TARGET_EFAULT;
-            }
+    /* check the range of the first argument num */
+    /* (TARGET_SYS_SENDMMSG is the highest among TARGET_SYS_xxx) */
+    if (num < 1 || num > TARGET_SYS_SENDMMSG) {
+        return -TARGET_EINVAL;
+    }
+    /* ensure we have space for args */
+    if (nargs[num] > ARRAY_SIZE(a)) {
+        return -TARGET_EINVAL;
+    }
+    /* collect the arguments in a[] according to nargs[] */
+    for (i = 0; i < nargs[num]; ++i) {
+        if (get_user_ual(a[i], vptr + i * sizeof(abi_long)) != 0) {
+            return -TARGET_EFAULT;
         }
     }
-
-    /* now when we have the args, actually handle the call */
+    /* now when we have the args, invoke the appropriate underlying function */
     switch (num) {
-    case SOCKOP_socket: /* domain, type, protocol */
+    case TARGET_SYS_SOCKET: /* domain, type, protocol */
         return do_socket(a[0], a[1], a[2]);
-    case SOCKOP_bind: /* sockfd, addr, addrlen */
+    case TARGET_SYS_BIND: /* sockfd, addr, addrlen */
         return do_bind(a[0], a[1], a[2]);
-    case SOCKOP_connect: /* sockfd, addr, addrlen */
+    case TARGET_SYS_CONNECT: /* sockfd, addr, addrlen */
         return do_connect(a[0], a[1], a[2]);
-    case SOCKOP_listen: /* sockfd, backlog */
+    case TARGET_SYS_LISTEN: /* sockfd, backlog */
         return get_errno(listen(a[0], a[1]));
-    case SOCKOP_accept: /* sockfd, addr, addrlen */
+    case TARGET_SYS_ACCEPT: /* sockfd, addr, addrlen */
         return do_accept4(a[0], a[1], a[2], 0);
-    case SOCKOP_accept4: /* sockfd, addr, addrlen, flags */
-        return do_accept4(a[0], a[1], a[2], a[3]);
-    case SOCKOP_getsockname: /* sockfd, addr, addrlen */
+    case TARGET_SYS_GETSOCKNAME: /* sockfd, addr, addrlen */
         return do_getsockname(a[0], a[1], a[2]);
-    case SOCKOP_getpeername: /* sockfd, addr, addrlen */
+    case TARGET_SYS_GETPEERNAME: /* sockfd, addr, addrlen */
         return do_getpeername(a[0], a[1], a[2]);
-    case SOCKOP_socketpair: /* domain, type, protocol, tab */
+    case TARGET_SYS_SOCKETPAIR: /* domain, type, protocol, tab */
         return do_socketpair(a[0], a[1], a[2], a[3]);
-    case SOCKOP_send: /* sockfd, msg, len, flags */
+    case TARGET_SYS_SEND: /* sockfd, msg, len, flags */
         return do_sendto(a[0], a[1], a[2], a[3], 0, 0);
-    case SOCKOP_recv: /* sockfd, msg, len, flags */
+    case TARGET_SYS_RECV: /* sockfd, msg, len, flags */
         return do_recvfrom(a[0], a[1], a[2], a[3], 0, 0);
-    case SOCKOP_sendto: /* sockfd, msg, len, flags, addr, addrlen */
+    case TARGET_SYS_SENDTO: /* sockfd, msg, len, flags, addr, addrlen */
         return do_sendto(a[0], a[1], a[2], a[3], a[4], a[5]);
-    case SOCKOP_recvfrom: /* sockfd, msg, len, flags, addr, addrlen */
+    case TARGET_SYS_RECVFROM: /* sockfd, msg, len, flags, addr, addrlen */
         return do_recvfrom(a[0], a[1], a[2], a[3], a[4], a[5]);
-    case SOCKOP_shutdown: /* sockfd, how */
+    case TARGET_SYS_SHUTDOWN: /* sockfd, how */
         return get_errno(shutdown(a[0], a[1]));
-    case SOCKOP_sendmsg: /* sockfd, msg, flags */
+    case TARGET_SYS_SETSOCKOPT: /* sockfd, level, optname, optval, optlen */
+        return do_setsockopt(a[0], a[1], a[2], a[3], a[4]);
+    case TARGET_SYS_GETSOCKOPT: /* sockfd, level, optname, optval, optlen */
+        return do_getsockopt(a[0], a[1], a[2], a[3], a[4]);
+    case TARGET_SYS_SENDMSG: /* sockfd, msg, flags */
         return do_sendrecvmsg(a[0], a[1], a[2], 1);
-    case SOCKOP_recvmsg: /* sockfd, msg, flags */
+    case TARGET_SYS_RECVMSG: /* sockfd, msg, flags */
         return do_sendrecvmsg(a[0], a[1], a[2], 0);
-    case SOCKOP_sendmmsg: /* sockfd, msgvec, vlen, flags */
-        return do_sendrecvmmsg(a[0], a[1], a[2], a[3], 1);
-    case SOCKOP_recvmmsg: /* sockfd, msgvec, vlen, flags */
+    case TARGET_SYS_ACCEPT4: /* sockfd, addr, addrlen, flags */
+        return do_accept4(a[0], a[1], a[2], a[3]);
+    case TARGET_SYS_RECVMMSG: /* sockfd, msgvec, vlen, flags */
         return do_sendrecvmmsg(a[0], a[1], a[2], a[3], 0);
-    case SOCKOP_setsockopt: /* sockfd, level, optname, optval, optlen */
-        return do_setsockopt(a[0], a[1], a[2], a[3], a[4]);
-    case SOCKOP_getsockopt: /* sockfd, level, optname, optval, optlen */
-        return do_getsockopt(a[0], a[1], a[2], a[3], a[4]);
+    case TARGET_SYS_SENDMMSG: /* sockfd, msgvec, vlen, flags */
+        return do_sendrecvmmsg(a[0], a[1], a[2], a[3], 1);
     default:
         gemu_log("Unsupported socketcall: %d\n", num);
-        return -TARGET_ENOSYS;
+        return -TARGET_EINVAL;
     }
 }
 #endif
@@ -6770,6 +6790,77 @@ static inline abi_long host_to_target_itimerspec(abi_ulong target_addr,
     return 0;
 }
 
+static inline abi_long target_to_host_timex(struct timex *host_tx,
+                                            abi_long target_addr)
+{
+    struct target_timex *target_tx;
+
+    if (!lock_user_struct(VERIFY_READ, target_tx, target_addr, 1)) {
+        return -TARGET_EFAULT;
+    }
+
+    __get_user(host_tx->modes, &target_tx->modes);
+    __get_user(host_tx->offset, &target_tx->offset);
+    __get_user(host_tx->freq, &target_tx->freq);
+    __get_user(host_tx->maxerror, &target_tx->maxerror);
+    __get_user(host_tx->esterror, &target_tx->esterror);
+    __get_user(host_tx->status, &target_tx->status);
+    __get_user(host_tx->constant, &target_tx->constant);
+    __get_user(host_tx->precision, &target_tx->precision);
+    __get_user(host_tx->tolerance, &target_tx->tolerance);
+    __get_user(host_tx->time.tv_sec, &target_tx->time.tv_sec);
+    __get_user(host_tx->time.tv_usec, &target_tx->time.tv_usec);
+    __get_user(host_tx->tick, &target_tx->tick);
+    __get_user(host_tx->ppsfreq, &target_tx->ppsfreq);
+    __get_user(host_tx->jitter, &target_tx->jitter);
+    __get_user(host_tx->shift, &target_tx->shift);
+    __get_user(host_tx->stabil, &target_tx->stabil);
+    __get_user(host_tx->jitcnt, &target_tx->jitcnt);
+    __get_user(host_tx->calcnt, &target_tx->calcnt);
+    __get_user(host_tx->errcnt, &target_tx->errcnt);
+    __get_user(host_tx->stbcnt, &target_tx->stbcnt);
+    __get_user(host_tx->tai, &target_tx->tai);
+
+    unlock_user_struct(target_tx, target_addr, 0);
+    return 0;
+}
+
+static inline abi_long host_to_target_timex(abi_long target_addr,
+                                            struct timex *host_tx)
+{
+    struct target_timex *target_tx;
+
+    if (!lock_user_struct(VERIFY_WRITE, target_tx, target_addr, 0)) {
+        return -TARGET_EFAULT;
+    }
+
+    __put_user(host_tx->modes, &target_tx->modes);
+    __put_user(host_tx->offset, &target_tx->offset);
+    __put_user(host_tx->freq, &target_tx->freq);
+    __put_user(host_tx->maxerror, &target_tx->maxerror);
+    __put_user(host_tx->esterror, &target_tx->esterror);
+    __put_user(host_tx->status, &target_tx->status);
+    __put_user(host_tx->constant, &target_tx->constant);
+    __put_user(host_tx->precision, &target_tx->precision);
+    __put_user(host_tx->tolerance, &target_tx->tolerance);
+    __put_user(host_tx->time.tv_sec, &target_tx->time.tv_sec);
+    __put_user(host_tx->time.tv_usec, &target_tx->time.tv_usec);
+    __put_user(host_tx->tick, &target_tx->tick);
+    __put_user(host_tx->ppsfreq, &target_tx->ppsfreq);
+    __put_user(host_tx->jitter, &target_tx->jitter);
+    __put_user(host_tx->shift, &target_tx->shift);
+    __put_user(host_tx->stabil, &target_tx->stabil);
+    __put_user(host_tx->jitcnt, &target_tx->jitcnt);
+    __put_user(host_tx->calcnt, &target_tx->calcnt);
+    __put_user(host_tx->errcnt, &target_tx->errcnt);
+    __put_user(host_tx->stbcnt, &target_tx->stbcnt);
+    __put_user(host_tx->tai, &target_tx->tai);
+
+    unlock_user_struct(target_tx, target_addr, 1);
+    return 0;
+}
+
+
 static inline abi_long target_to_host_sigevent(struct sigevent *host_sevp,
                                                abi_ulong target_addr)
 {
@@ -8003,6 +8094,11 @@ abi_long do_syscall(void *cpu_env, int num, abi_long arg1,
         sync();
         ret = 0;
         break;
+#if defined(TARGET_NR_syncfs) && defined(CONFIG_SYNCFS)
+    case TARGET_NR_syncfs:
+        ret = get_errno(syncfs(arg1));
+        break;
+#endif
     case TARGET_NR_kill:
         ret = get_errno(safe_kill(arg1, target_to_host_signal(arg2)));
         break;
@@ -9240,14 +9336,52 @@ abi_long do_syscall(void *cpu_env, int num, abi_long arg1,
         ret = do_setsockopt(arg1, arg2, arg3, arg4, (socklen_t) arg5);
         break;
 #endif
-
+#if defined(TARGET_NR_syslog)
     case TARGET_NR_syslog:
-        if (!(p = lock_user_string(arg2)))
-            goto efault;
-        ret = get_errno(sys_syslog((int)arg1, p, (int)arg3));
-        unlock_user(p, arg2, 0);
-        break;
+        {
+            int len = arg2;
 
+            switch (arg1) {
+            case TARGET_SYSLOG_ACTION_CLOSE:         /* Close log */
+            case TARGET_SYSLOG_ACTION_OPEN:          /* Open log */
+            case TARGET_SYSLOG_ACTION_CLEAR:         /* Clear ring buffer */
+            case TARGET_SYSLOG_ACTION_CONSOLE_OFF:   /* Disable logging */
+            case TARGET_SYSLOG_ACTION_CONSOLE_ON:    /* Enable logging */
+            case TARGET_SYSLOG_ACTION_CONSOLE_LEVEL: /* Set messages level */
+            case TARGET_SYSLOG_ACTION_SIZE_UNREAD:   /* Number of chars */
+            case TARGET_SYSLOG_ACTION_SIZE_BUFFER:   /* Size of the buffer */
+                {
+                    ret = get_errno(sys_syslog((int)arg1, NULL, (int)arg3));
+                }
+                break;
+            case TARGET_SYSLOG_ACTION_READ:          /* Read from log */
+            case TARGET_SYSLOG_ACTION_READ_CLEAR:    /* Read/clear msgs */
+            case TARGET_SYSLOG_ACTION_READ_ALL:      /* Read last messages */
+                {
+                    ret = -TARGET_EINVAL;
+                    if (len < 0) {
+                        goto fail;
+                    }
+                    ret = 0;
+                    if (len == 0) {
+                        break;
+                    }
+                    p = lock_user(VERIFY_WRITE, arg2, arg3, 0);
+                    if (!p) {
+                        ret = -TARGET_EFAULT;
+                        goto fail;
+                    }
+                    ret = get_errno(sys_syslog((int)arg1, p, (int)arg3));
+                    unlock_user(p, arg2, arg3);
+                }
+                break;
+            default:
+                ret = -EINVAL;
+                break;
+            }
+        }
+        break;
+#endif
     case TARGET_NR_setitimer:
         {
             struct itimerval value, ovalue, *pvalue;
@@ -9543,7 +9677,37 @@ abi_long do_syscall(void *cpu_env, int num, abi_long arg1,
 #endif
 #endif
     case TARGET_NR_adjtimex:
-        goto unimplemented;
+        {
+            struct timex host_buf;
+
+            if (target_to_host_timex(&host_buf, arg1) != 0) {
+                goto efault;
+            }
+            ret = get_errno(adjtimex(&host_buf));
+            if (!is_error(ret)) {
+                if (host_to_target_timex(arg1, &host_buf) != 0) {
+                    goto efault;
+                }
+            }
+        }
+        break;
+#if defined(TARGET_NR_clock_adjtime) && defined(CONFIG_CLOCK_ADJTIME)
+    case TARGET_NR_clock_adjtime:
+        {
+            struct timex htx, *phtx = &htx;
+
+            if (target_to_host_timex(phtx, arg2) != 0) {
+                goto efault;
+            }
+            ret = get_errno(clock_adjtime(arg1, phtx));
+            if (!is_error(ret) && phtx) {
+                if (host_to_target_timex(arg2, phtx) != 0) {
+                    goto efault;
+                }
+            }
+        }
+        break;
+#endif
 #ifdef TARGET_NR_create_module
     case TARGET_NR_create_module:
 #endif
@@ -9899,6 +10063,32 @@ abi_long do_syscall(void *cpu_env, int num, abi_long arg1,
             }
         }
         break;
+#if defined(TARGET_NR_preadv)
+    case TARGET_NR_preadv:
+        {
+            struct iovec *vec = lock_iovec(VERIFY_WRITE, arg2, arg3, 0);
+            if (vec != NULL) {
+                ret = get_errno(safe_preadv(arg1, vec, arg3, arg4, arg5));
+                unlock_iovec(vec, arg2, arg3, 1);
+            } else {
+                ret = -host_to_target_errno(errno);
+           }
+        }
+        break;
+#endif
+#if defined(TARGET_NR_pwritev)
+    case TARGET_NR_pwritev:
+        {
+            struct iovec *vec = lock_iovec(VERIFY_READ, arg2, arg3, 1);
+            if (vec != NULL) {
+                ret = get_errno(safe_pwritev(arg1, vec, arg3, arg4, arg5));
+                unlock_iovec(vec, arg2, arg3, 0);
+            } else {
+                ret = -host_to_target_errno(errno);
+           }
+        }
+        break;
+#endif
     case TARGET_NR_getsid:
         ret = get_errno(getsid(arg1));
         break;
@@ -11372,16 +11562,18 @@ abi_long do_syscall(void *cpu_env, int num, abi_long arg1,
 #if defined(TARGET_NR_mq_open) && defined(__NR_mq_open)
     case TARGET_NR_mq_open:
         {
-            struct mq_attr posix_mq_attr, *attrp;
+            struct mq_attr posix_mq_attr;
+            int host_flags;
 
+            host_flags = target_to_host_bitmask(arg2, fcntl_flags_tbl);
+            if (copy_from_user_mq_attr(&posix_mq_attr, arg4) != 0) {
+                goto efault;
+            }
             p = lock_user_string(arg1 - 1);
-            if (arg4 != 0) {
-                copy_from_user_mq_attr (&posix_mq_attr, arg4);
-                attrp = &posix_mq_attr;
-            } else {
-                attrp = 0;
+            if (!p) {
+                goto efault;
             }
-            ret = get_errno(mq_open(p, arg2, arg3, attrp));
+            ret = get_errno(mq_open(p, host_flags, arg3, &posix_mq_attr));
             unlock_user (p, arg1, 0);
         }
         break;
@@ -11638,7 +11830,12 @@ abi_long do_syscall(void *cpu_env, int num, abi_long arg1,
             goto efault;
         }
 
-        ep = alloca(maxevents * sizeof(struct epoll_event));
+        ep = g_try_new(struct epoll_event, maxevents);
+        if (!ep) {
+            unlock_user(target_ep, arg2, 0);
+            ret = -TARGET_ENOMEM;
+            break;
+        }
 
         switch (num) {
 #if defined(TARGET_NR_epoll_pwait)
@@ -11656,8 +11853,8 @@ abi_long do_syscall(void *cpu_env, int num, abi_long arg1,
                 target_set = lock_user(VERIFY_READ, arg5,
                                        sizeof(target_sigset_t), 1);
                 if (!target_set) {
-                    unlock_user(target_ep, arg2, 0);
-                    goto efault;
+                    ret = -TARGET_EFAULT;
+                    break;
                 }
                 target_to_host_sigset(set, target_set);
                 unlock_user(target_set, arg5, 0);
@@ -11685,8 +11882,12 @@ abi_long do_syscall(void *cpu_env, int num, abi_long arg1,
                 target_ep[i].events = tswap32(ep[i].events);
                 target_ep[i].data.u64 = tswap64(ep[i].data.u64);
             }
+            unlock_user(target_ep, arg2,
+                        ret * sizeof(struct target_epoll_event));
+        } else {
+            unlock_user(target_ep, arg2, 0);
         }
-        unlock_user(target_ep, arg2, ret * sizeof(struct target_epoll_event));
+        g_free(ep);
         break;
     }
 #endif
@@ -11947,6 +12148,11 @@ abi_long do_syscall(void *cpu_env, int num, abi_long arg1,
         ret = get_errno(unshare(arg1));
         break;
 #endif
+#if defined(TARGET_NR_kcmp) && defined(__NR_kcmp)
+    case TARGET_NR_kcmp:
+        ret = get_errno(kcmp(arg1, arg2, arg3, arg4, arg5));
+        break;
+#endif
 
     default:
     unimplemented:
diff --git a/linux-user/syscall_defs.h b/linux-user/syscall_defs.h
index 9fdbe865dc..0b15466743 100644
--- a/linux-user/syscall_defs.h
+++ b/linux-user/syscall_defs.h
@@ -9,26 +9,28 @@
 
 #include "syscall_nr.h"
 
-#define SOCKOP_socket           1
-#define SOCKOP_bind             2
-#define SOCKOP_connect          3
-#define SOCKOP_listen           4
-#define SOCKOP_accept           5
-#define SOCKOP_getsockname      6
-#define SOCKOP_getpeername      7
-#define SOCKOP_socketpair       8
-#define SOCKOP_send             9
-#define SOCKOP_recv             10
-#define SOCKOP_sendto           11
-#define SOCKOP_recvfrom         12
-#define SOCKOP_shutdown         13
-#define SOCKOP_setsockopt       14
-#define SOCKOP_getsockopt       15
-#define SOCKOP_sendmsg          16
-#define SOCKOP_recvmsg          17
-#define SOCKOP_accept4          18
-#define SOCKOP_recvmmsg         19
-#define SOCKOP_sendmmsg         20
+
+/* socket operations for socketcall() */
+#define TARGET_SYS_SOCKET       1         /* socket()              */
+#define TARGET_SYS_BIND         2         /* bind()                */
+#define TARGET_SYS_CONNECT      3         /* connect()             */
+#define TARGET_SYS_LISTEN       4         /* listen()              */
+#define TARGET_SYS_ACCEPT       5         /* accept()              */
+#define TARGET_SYS_GETSOCKNAME  6         /* getsockname()         */
+#define TARGET_SYS_GETPEERNAME  7         /* getpeername()         */
+#define TARGET_SYS_SOCKETPAIR   8         /* socketpair()          */
+#define TARGET_SYS_SEND         9         /* send()                */
+#define TARGET_SYS_RECV         10        /* recv()                */
+#define TARGET_SYS_SENDTO       11        /* sendto()              */
+#define TARGET_SYS_RECVFROM     12        /* recvfrom()            */
+#define TARGET_SYS_SHUTDOWN     13        /* shutdown()            */
+#define TARGET_SYS_SETSOCKOPT   14        /* setsockopt()          */
+#define TARGET_SYS_GETSOCKOPT   15        /* getsockopt()          */
+#define TARGET_SYS_SENDMSG      16        /* sendmsg()             */
+#define TARGET_SYS_RECVMSG      17        /* recvmsg()             */
+#define TARGET_SYS_ACCEPT4      18        /* accept4()             */
+#define TARGET_SYS_RECVMMSG     19        /* recvmmsg()            */
+#define TARGET_SYS_SENDMMSG     20        /* sendmmsg()            */
 
 #define IPCOP_semop		1
 #define IPCOP_semget		2
@@ -207,6 +209,34 @@ struct target_itimerspec {
     struct target_timespec it_value;
 };
 
+struct target_timex {
+    abi_uint modes;              /* Mode selector */
+    abi_long offset;             /* Time offset */
+    abi_long freq;               /* Frequency offset */
+    abi_long maxerror;           /* Maximum error (microseconds) */
+    abi_long esterror;           /* Estimated error (microseconds) */
+    abi_int status;              /* Clock command/status */
+    abi_long constant;           /* PLL (phase-locked loop) time constant */
+    abi_long precision;          /* Clock precision (microseconds, ro) */
+    abi_long tolerance;          /* Clock freq. tolerance (ppm, ro) */
+    struct target_timeval time;  /* Current time */
+    abi_long tick;               /* Microseconds between clock ticks */
+    abi_long ppsfreq;            /* PPS (pulse per second) frequency */
+    abi_long jitter;             /* PPS jitter (ro); nanoseconds */
+    abi_int shift;               /* PPS interval duration (seconds) */
+    abi_long stabil;             /* PPS stability */
+    abi_long jitcnt;             /* PPS jitter limit exceeded (ro) */
+    abi_long calcnt;             /* PPS calibration intervals */
+    abi_long errcnt;             /* PPS calibration errors */
+    abi_long stbcnt;             /* PPS stability limit exceeded */
+    abi_int tai;                 /* TAI offset */
+
+    /* Further padding bytes to allow for future expansion */
+    abi_int:32; abi_int:32; abi_int:32; abi_int:32;
+    abi_int:32; abi_int:32; abi_int:32; abi_int:32;
+    abi_int:32; abi_int:32; abi_int:32;
+};
+
 typedef abi_long target_clock_t;
 
 #define TARGET_HZ 100
@@ -2628,15 +2658,19 @@ typedef int32_t target_timer_t;
 
 struct target_sigevent {
     target_sigval_t sigev_value;
-    int32_t sigev_signo;
-    int32_t sigev_notify;
+    abi_int sigev_signo;
+    abi_int sigev_notify;
     union {
-        int32_t _pad[TARGET_SIGEV_PAD_SIZE];
-        int32_t _tid;
+        abi_int _pad[TARGET_SIGEV_PAD_SIZE];
+        abi_int _tid;
 
+        /* The kernel (and thus QEMU) never looks at these;
+         * they're only used as part of the ABI between a
+         * userspace program and libc.
+         */
         struct {
-            void (*_function)(sigval_t);
-            void *_attribute;
+            abi_ulong _function;
+            abi_ulong _attribute;
         } _sigev_thread;
     } _sigev_un;
 };
@@ -2652,4 +2686,29 @@ struct target_user_cap_data {
     uint32_t inheritable;
 };
 
+/* from kernel's include/linux/syslog.h */
+
+/* Close the log.  Currently a NOP. */
+#define TARGET_SYSLOG_ACTION_CLOSE          0
+/* Open the log. Currently a NOP. */
+#define TARGET_SYSLOG_ACTION_OPEN           1
+/* Read from the log. */
+#define TARGET_SYSLOG_ACTION_READ           2
+/* Read all messages remaining in the ring buffer. */
+#define TARGET_SYSLOG_ACTION_READ_ALL       3
+/* Read and clear all messages remaining in the ring buffer */
+#define TARGET_SYSLOG_ACTION_READ_CLEAR     4
+/* Clear ring buffer. */
+#define TARGET_SYSLOG_ACTION_CLEAR          5
+/* Disable printk's to console */
+#define TARGET_SYSLOG_ACTION_CONSOLE_OFF    6
+/* Enable printk's to console */
+#define TARGET_SYSLOG_ACTION_CONSOLE_ON     7
+/* Set level of messages printed to console */
+#define TARGET_SYSLOG_ACTION_CONSOLE_LEVEL  8
+/* Return number of unread characters in the log buffer */
+#define TARGET_SYSLOG_ACTION_SIZE_UNREAD    9
+/* Return size of the log buffer */
+#define TARGET_SYSLOG_ACTION_SIZE_BUFFER   10
+
 #endif