diff --git a/linux-user/mips/target_structs.h b/linux-user/mips/target_structs.h
index fbd995581e..909ba89708 100644
--- a/linux-user/mips/target_structs.h
+++ b/linux-user/mips/target_structs.h
@@ -45,4 +45,20 @@ struct target_shmid_ds {
     abi_ulong __unused2;
 };
 
+#define TARGET_SEMID64_DS
+
+/*
+ * The semid64_ds structure for the MIPS architecture.
+ * Note extra padding because this structure is passed back and forth
+ * between kernel and user space.
+ */
+struct target_semid64_ds {
+    struct target_ipc_perm sem_perm;
+    abi_ulong sem_otime;
+    abi_ulong sem_ctime;
+    abi_ulong sem_nsems;
+    abi_ulong __unused1;
+    abi_ulong __unused2;
+};
+
 #endif
diff --git a/linux-user/mips/target_syscall.h b/linux-user/mips/target_syscall.h
index 6c666dcb73..0b64b73714 100644
--- a/linux-user/mips/target_syscall.h
+++ b/linux-user/mips/target_syscall.h
@@ -221,6 +221,8 @@ struct target_pt_regs {
 #undef TARGET_ENOTRECOVERABLE
 #define TARGET_ENOTRECOVERABLE 166     /* State not recoverable */
 
+#undef TARGET_EDQUOT
+#define TARGET_EDQUOT          1133    /* Quota exceeded */
 
 #define UNAME_MACHINE "mips"
 #define UNAME_MINIMUM_RELEASE "2.6.32"
diff --git a/linux-user/mips64/target_syscall.h b/linux-user/mips64/target_syscall.h
index a9c17f7edf..6692917e2e 100644
--- a/linux-user/mips64/target_syscall.h
+++ b/linux-user/mips64/target_syscall.h
@@ -218,6 +218,8 @@ struct target_pt_regs {
 #undef TARGET_ENOTRECOVERABLE
 #define TARGET_ENOTRECOVERABLE 166     /* State not recoverable */
 
+#undef TARGET_EDQUOT
+#define TARGET_EDQUOT          1133    /* Quota exceeded */
 
 #define UNAME_MACHINE "mips64"
 #define UNAME_MINIMUM_RELEASE "2.6.32"
diff --git a/linux-user/strace.list b/linux-user/strace.list
index aa967a2475..608f7e0932 100644
--- a/linux-user/strace.list
+++ b/linux-user/strace.list
@@ -6,6 +6,9 @@
 #ifdef TARGET_NR_accept
 { TARGET_NR_accept, "accept" , NULL, print_accept, NULL },
 #endif
+#ifdef TARGET_NR_accept4
+{ TARGET_NR_accept4, "accept4" , NULL, NULL, NULL },
+#endif
 #ifdef TARGET_NR_access
 { TARGET_NR_access, "access" , NULL, print_access, NULL },
 #endif
@@ -39,6 +42,9 @@
 #ifdef TARGET_NR_bind
 { TARGET_NR_bind, "bind" , NULL, NULL, NULL },
 #endif
+#ifdef TARGET_NR_bpf
+{ TARGET_NR_bpf, "bpf" , NULL, NULL, NULL },
+#endif
 #ifdef TARGET_NR_break
 { TARGET_NR_break, "break" , NULL, NULL, NULL },
 #endif
@@ -123,18 +129,30 @@
 #ifdef TARGET_NR_epoll_ctl_old
 { TARGET_NR_epoll_ctl_old, "epoll_ctl_old" , NULL, NULL, NULL },
 #endif
+#ifdef TARGET_NR_epoll_pwait
+{ TARGET_NR_epoll_pwait, "epoll_pwait" , NULL, NULL, NULL },
+#endif
 #ifdef TARGET_NR_epoll_wait
 { TARGET_NR_epoll_wait, "epoll_wait" , NULL, NULL, NULL },
 #endif
 #ifdef TARGET_NR_epoll_wait_old
 { TARGET_NR_epoll_wait_old, "epoll_wait_old" , NULL, NULL, NULL },
 #endif
+#ifdef TARGET_NR_eventfd
+{ TARGET_NR_eventfd, "eventfd" , NULL, NULL, NULL },
+#endif
+#ifdef TARGET_NR_eventfd2
+{ TARGET_NR_eventfd2, "eventfd2" , NULL, NULL, NULL },
+#endif
 #ifdef TARGET_NR_execv
 { TARGET_NR_execv, "execv" , NULL, print_execv, NULL },
 #endif
 #ifdef TARGET_NR_execve
 { TARGET_NR_execve, "execve" , NULL, print_execve, NULL },
 #endif
+#ifdef TARGET_NR_execveat
+{ TARGET_NR_execveat, "execveat" , NULL, NULL, NULL },
+#endif
 #ifdef TARGET_NR_exec_with_loader
 { TARGET_NR_exec_with_loader, "exec_with_loader" , NULL, NULL, NULL },
 #endif
@@ -156,6 +174,15 @@
 #ifdef TARGET_NR_fadvise64_64
 { TARGET_NR_fadvise64_64, "fadvise64_64" , NULL, NULL, NULL },
 #endif
+#ifdef TARGET_NR_fallocate
+{ TARGET_NR_fallocate, "fallocate" , NULL, NULL, NULL },
+#endif
+#ifdef TARGET_NR_fanotify_init
+{ TARGET_NR_fanotify_init, "fanotify_init" , NULL, NULL, NULL },
+#endif
+#ifdef TARGET_NR_fanotify_mark
+{ TARGET_NR_fanotify_mark, "fanotify_mark" , NULL, NULL, NULL },
+#endif
 #ifdef TARGET_NR_fchdir
 { TARGET_NR_fchdir, "fchdir" , NULL, NULL, NULL },
 #endif
@@ -186,6 +213,9 @@
 #ifdef TARGET_NR_fgetxattr
 { TARGET_NR_fgetxattr, "fgetxattr" , NULL, NULL, NULL },
 #endif
+#ifdef TARGET_NR_finit_module
+{ TARGET_NR_finit_module, "finit_module" , NULL, NULL, NULL },
+#endif
 #ifdef TARGET_NR_flistxattr
 { TARGET_NR_flistxattr, "flistxattr" , NULL, NULL, NULL },
 #endif
@@ -231,6 +261,9 @@
 #ifdef TARGET_NR_futimesat
 { TARGET_NR_futimesat, "futimesat" , NULL, print_futimesat, NULL },
 #endif
+#ifdef TARGET_NR_getcpu
+{ TARGET_NR_getcpu, "getcpu" , "%s(%p,%d)", NULL, NULL },
+#endif
 #ifdef TARGET_NR_getcwd
 { TARGET_NR_getcwd, "getcwd" , "%s(%p,%d)", NULL, NULL },
 #endif
@@ -306,6 +339,9 @@
 #ifdef TARGET_NR_getpriority
 { TARGET_NR_getpriority, "getpriority", "%s(%#x,%#x)", NULL, NULL },
 #endif
+#ifdef TARGET_NR_getrandom
+{ TARGET_NR_getrandom, "getrandom", NULL, NULL, NULL },
+#endif
 #ifdef TARGET_NR_getresgid
 { TARGET_NR_getresgid, "getresgid" , NULL, NULL, NULL },
 #endif
@@ -379,6 +415,9 @@
 #ifdef TARGET_NR_inotify_init
 { TARGET_NR_inotify_init, "inotify_init" , NULL, NULL, NULL },
 #endif
+#ifdef TARGET_NR_inotify_init1
+{ TARGET_NR_inotify_init1, "inotify_init1" , NULL, NULL, NULL },
+#endif
 #ifdef TARGET_NR_inotify_rm_watch
 { TARGET_NR_inotify_rm_watch, "inotify_rm_watch" , NULL, NULL, NULL },
 #endif
@@ -415,6 +454,9 @@
 #ifdef TARGET_NR_ipc
 { TARGET_NR_ipc, "ipc" , NULL, print_ipc, NULL },
 #endif
+#ifdef TARGET_NR_kcmp
+{ TARGET_NR_kcmp, "kcmp" , NULL, NULL, NULL },
+#endif
 #ifdef TARGET_NR_kexec_load
 { TARGET_NR_kexec_load, "kexec_load" , NULL, NULL, NULL },
 #endif
@@ -484,6 +526,12 @@
 #ifdef TARGET_NR_mbind
 { TARGET_NR_mbind, "mbind" , NULL, NULL, NULL },
 #endif
+#ifdef TARGET_NR_membarrier
+{ TARGET_NR_membarrier, "membarrier" , NULL, NULL, NULL },
+#endif
+#ifdef TARGET_NR_memfd_create
+{ TARGET_NR_memfd_create, "memfd_create" , NULL, NULL, NULL },
+#endif
 #ifdef TARGET_NR_memory_ordering
 { TARGET_NR_memory_ordering, "memory_ordering" , NULL, NULL, NULL },
 #endif
@@ -511,6 +559,9 @@
 #ifdef TARGET_NR_mlock
 { TARGET_NR_mlock, "mlock" , NULL, NULL, NULL },
 #endif
+#ifdef TARGET_NR_mlock2
+{ TARGET_NR_mlock2, "mlock2" , NULL, NULL, NULL },
+#endif
 #ifdef TARGET_NR_mlockall
 { TARGET_NR_mlockall, "mlockall" , NULL, NULL, NULL },
 #endif
@@ -583,6 +634,9 @@
 #ifdef TARGET_NR_munmap
 { TARGET_NR_munmap, "munmap" , NULL, print_munmap, NULL },
 #endif
+#ifdef TARGET_NR_name_to_handle_at
+{ TARGET_NR_name_to_handle_at, "name_to_handle_at" , NULL, NULL, NULL },
+#endif
 #ifdef TARGET_NR_nanosleep
 { TARGET_NR_nanosleep, "nanosleep" , NULL, NULL, NULL },
 #endif
@@ -952,6 +1006,9 @@
 #ifdef TARGET_NR_pciconfig_write
 { TARGET_NR_pciconfig_write, "pciconfig_write" , NULL, NULL, NULL },
 #endif
+#ifdef TARGET_NR_perf_event_open
+{ TARGET_NR_perf_event_open, "perf_event_open" , NULL, NULL, NULL },
+#endif
 #ifdef TARGET_NR_perfctr
 { TARGET_NR_perfctr, "perfctr" , NULL, NULL, NULL },
 #endif
@@ -976,6 +1033,18 @@
 #ifdef TARGET_NR_pread64
 { TARGET_NR_pread64, "pread64" , NULL, NULL, NULL },
 #endif
+#ifdef TARGET_NR_preadv
+{ TARGET_NR_preadv, "preadv" , NULL, NULL, NULL },
+#endif
+#ifdef TARGET_NR_prlimit64
+{ TARGET_NR_prlimit64, "prlimit64" , NULL, NULL, NULL },
+#endif
+#ifdef TARGET_NR_process_vm_readv
+{ TARGET_NR_process_vm_readv, "process_vm_readv" , NULL, NULL, NULL },
+#endif
+#ifdef TARGET_NR_process_vm_writev
+{ TARGET_NR_process_vm_writev, "process_vm_writev" , NULL, NULL, NULL },
+#endif
 #ifdef TARGET_NR_prof
 { TARGET_NR_prof, "prof" , NULL, NULL, NULL },
 #endif
@@ -994,6 +1063,9 @@
 #ifdef TARGET_NR_pwrite64
 { TARGET_NR_pwrite64, "pwrite64" , NULL, NULL, NULL },
 #endif
+#ifdef TARGET_NR_pwritev
+{ TARGET_NR_pwritev, "pwritev" , NULL, NULL, NULL },
+#endif
 #ifdef TARGET_NR_query_module
 { TARGET_NR_query_module, "query_module" , NULL, NULL, NULL },
 #endif
@@ -1027,6 +1099,9 @@
 #ifdef TARGET_NR_recvfrom
 { TARGET_NR_recvfrom, "recvfrom" , NULL, NULL, NULL },
 #endif
+#ifdef TARGET_NR_recvmmsg
+{ TARGET_NR_recvmmsg, "recvmmsg" , NULL, NULL, NULL },
+#endif
 #ifdef TARGET_NR_recvmsg
 { TARGET_NR_recvmsg, "recvmsg" , NULL, NULL, NULL },
 #endif
@@ -1042,9 +1117,18 @@
 #ifdef TARGET_NR_renameat
 { TARGET_NR_renameat, "renameat" , NULL, print_renameat, NULL },
 #endif
+#ifdef TARGET_NR_renameat2
+{ TARGET_NR_renameat2, "renameat2" , NULL, NULL, NULL },
+#endif
 #ifdef TARGET_NR_request_key
 { TARGET_NR_request_key, "request_key" , NULL, NULL, NULL },
 #endif
+#ifdef TARGET_NR_reserved177
+{ TARGET_NR_reserved177, "reserved177" , NULL, NULL, NULL },
+#endif
+#ifdef TARGET_NR_reserved193
+{ TARGET_NR_reserved193, "reserved193" , NULL, NULL, NULL },
+#endif
 #ifdef TARGET_NR_reserved221
 { TARGET_NR_reserved221, "reserved221" , NULL, NULL, NULL },
 #endif
@@ -1078,12 +1162,18 @@
 #ifdef TARGET_NR_rt_sigtimedwait
 { TARGET_NR_rt_sigtimedwait, "rt_sigtimedwait" , NULL, NULL, NULL },
 #endif
+#ifdef TARGET_NR_rt_tgsigqueueinfo
+{ TARGET_NR_rt_tgsigqueueinfo, "rt_tgsigqueueinfo" , NULL, NULL, NULL },
+#endif
 #ifdef TARGET_NR_sched_getaffinity
 { TARGET_NR_sched_getaffinity, "sched_getaffinity" , NULL, NULL, NULL },
 #endif
 #ifdef TARGET_NR_sched_get_affinity
 { TARGET_NR_sched_get_affinity, "sched_get_affinity" , NULL, NULL, NULL },
 #endif
+#ifdef TARGET_NR_sched_getattr
+{ TARGET_NR_sched_getattr, "sched_getattr" , NULL, NULL, NULL },
+#endif
 #ifdef TARGET_NR_sched_getparam
 { TARGET_NR_sched_getparam, "sched_getparam" , NULL, NULL, NULL },
 #endif
@@ -1102,6 +1192,9 @@
 #ifdef TARGET_NR_sched_setaffinity
 { TARGET_NR_sched_setaffinity, "sched_setaffinity" , NULL, NULL, NULL },
 #endif
+#ifdef TARGET_NR_sched_setatt
+{ TARGET_NR_sched_setatt, "sched_setatt" , NULL, NULL, NULL },
+#endif
 #ifdef TARGET_NR_sched_set_affinity
 { TARGET_NR_sched_set_affinity, "sched_set_affinity" , NULL, NULL, NULL },
 #endif
@@ -1114,6 +1207,9 @@
 #ifdef TARGET_NR_sched_yield
 { TARGET_NR_sched_yield, "sched_yield" , NULL, NULL, NULL },
 #endif
+#ifdef TARGET_NR_seccomp
+{ TARGET_NR_seccomp, "seccomp" , NULL, NULL, NULL },
+#endif
 #ifdef TARGET_NR_security
 { TARGET_NR_security, "security" , NULL, NULL, NULL },
 #endif
@@ -1141,6 +1237,9 @@
 #ifdef TARGET_NR_sendfile64
 { TARGET_NR_sendfile64, "sendfile64" , NULL, NULL, NULL },
 #endif
+#ifdef TARGET_NR_sendmmsg
+{ TARGET_NR_sendmmsg, "sendmmsg" , NULL, NULL, NULL },
+#endif
 #ifdef TARGET_NR_sendmsg
 { TARGET_NR_sendmsg, "sendmsg" , NULL, NULL, NULL },
 #endif
@@ -1280,6 +1379,12 @@
 #ifdef TARGET_NR_signal
 { TARGET_NR_signal, "signal" , NULL, NULL, NULL },
 #endif
+#ifdef TARGET_NR_signalfd
+{ TARGET_NR_signalfd, "signalfd" , NULL, NULL, NULL },
+#endif
+#ifdef TARGET_NR_signalfd4
+{ TARGET_NR_signalfd4, "signalfd4" , NULL, NULL, NULL },
+#endif
 #ifdef TARGET_NR_sigpending
 { TARGET_NR_sigpending, "sigpending" , NULL, NULL, NULL },
 #endif
@@ -1352,6 +1457,9 @@
 #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 },
+#endif
 #ifdef TARGET_NR_syscall
 { TARGET_NR_syscall, "syscall" , NULL, NULL, NULL },
 #endif
@@ -1409,6 +1517,9 @@
 #ifdef TARGET_NR_timer_settime
 { TARGET_NR_timer_settime, "timer_settime" , NULL, NULL, NULL },
 #endif
+#ifdef TARGET_NR_timerfd
+{ TARGET_NR_timerfd, "timerfd" , NULL, NULL, NULL },
+#endif
 #ifdef TARGET_NR_timerfd_create
 { TARGET_NR_timerfd_create, "timerfd_create" , NULL, NULL, NULL },
 #endif
@@ -1460,6 +1571,9 @@
 #ifdef TARGET_NR_unshare
 { TARGET_NR_unshare, "unshare" , NULL, NULL, NULL },
 #endif
+#ifdef TARGET_NR_userfaultfd
+{ TARGET_NR_userfaultfd, "userfaultfd" , NULL, NULL, NULL },
+#endif
 #ifdef TARGET_NR_unused109
 { TARGET_NR_unused109, "unused109" , NULL, NULL, NULL },
 #endif
diff --git a/linux-user/syscall.c b/linux-user/syscall.c
index 7aa2c1d720..0815f30965 100644
--- a/linux-user/syscall.c
+++ b/linux-user/syscall.c
@@ -658,7 +658,7 @@ static inline int next_free_host_timer(void)
 static inline int regpairs_aligned(void *cpu_env) {
     return ((((CPUARMState *)cpu_env)->eabi) == 1) ;
 }
-#elif defined(TARGET_MIPS)
+#elif defined(TARGET_MIPS) && (TARGET_ABI_BITS == 32)
 static inline int regpairs_aligned(void *cpu_env) { return 1; }
 #elif defined(TARGET_PPC) && !defined(TARGET_PPC64)
 /* SysV AVI for PPC32 expects 64bit parameters to be passed on odd/even pairs
@@ -757,6 +757,7 @@ static uint16_t host_to_target_errno_table[ERRNO_TABLE_SIZE] = {
     [ENAVAIL]		= TARGET_ENAVAIL,
     [EISNAM]		= TARGET_EISNAM,
     [EREMOTEIO]		= TARGET_EREMOTEIO,
+    [EDQUOT]            = TARGET_EDQUOT,
     [ESHUTDOWN]		= TARGET_ESHUTDOWN,
     [ETOOMANYREFS]	= TARGET_ETOOMANYREFS,
     [ETIMEDOUT]		= TARGET_ETIMEDOUT,
diff --git a/linux-user/syscall_defs.h b/linux-user/syscall_defs.h
index 5c19c5ca19..9fdbe865dc 100644
--- a/linux-user/syscall_defs.h
+++ b/linux-user/syscall_defs.h
@@ -898,7 +898,11 @@ struct target_pollfd {
 #define TARGET_KDSETLED        0x4B32	/* set led state [lights, not flags] */
 #define TARGET_KDSIGACCEPT     0x4B4E
 
+#if defined(TARGET_ALPHA) || defined(TARGET_MIPS) || defined(TARGET_SH4)
+#define TARGET_SIOCATMARK      TARGET_IOR('s', 7, int)
+#else
 #define TARGET_SIOCATMARK      0x8905
+#endif
 
 /* Networking ioctls */
 #define TARGET_SIOCADDRT       0x890B          /* add routing table entry */
@@ -2160,7 +2164,7 @@ struct target_statfs64 {
 #define TARGET_F_SETLK         6
 #define TARGET_F_SETLKW        7
 #define TARGET_F_SETOWN        24       /*  for sockets. */
-#define TARGET_F_GETOWN        25       /*  for sockets. */
+#define TARGET_F_GETOWN        23       /*  for sockets. */
 #else
 #define TARGET_F_GETLK         5
 #define TARGET_F_SETLK         6
@@ -2329,7 +2333,13 @@ struct target_flock {
     short l_whence;
     abi_long l_start;
     abi_long l_len;
+#if defined(TARGET_MIPS)
+    abi_long l_sysid;
+#endif
     int l_pid;
+#if defined(TARGET_MIPS)
+    abi_long pad[4];
+#endif
 };
 
 struct target_flock64 {
diff --git a/target-mips/translate.c b/target-mips/translate.c
index bab52cb254..55c2ca0c7b 100644
--- a/target-mips/translate.c
+++ b/target-mips/translate.c
@@ -13109,6 +13109,34 @@ static void gen_ldst_pair (DisasContext *ctx, uint32_t opc, int rd,
     tcg_temp_free(t1);
 }
 
+static void gen_sync(int stype)
+{
+    TCGBar tcg_mo = TCG_BAR_SC;
+
+    switch (stype) {
+    case 0x4: /* SYNC_WMB */
+        tcg_mo |= TCG_MO_ST_ST;
+        break;
+    case 0x10: /* SYNC_MB */
+        tcg_mo |= TCG_MO_ALL;
+        break;
+    case 0x11: /* SYNC_ACQUIRE */
+        tcg_mo |= TCG_MO_LD_LD | TCG_MO_LD_ST;
+        break;
+    case 0x12: /* SYNC_RELEASE */
+        tcg_mo |= TCG_MO_ST_ST | TCG_MO_LD_ST;
+        break;
+    case 0x13: /* SYNC_RMB */
+        tcg_mo |= TCG_MO_LD_LD;
+        break;
+    default:
+        tcg_mo |= TCG_MO_ALL;
+        break;
+    }
+
+    tcg_gen_mb(tcg_mo);
+}
+
 static void gen_pool32axf (CPUMIPSState *env, DisasContext *ctx, int rt, int rs)
 {
     int extension = (ctx->opcode >> 6) & 0x3f;
@@ -13384,7 +13412,7 @@ static void gen_pool32axf (CPUMIPSState *env, DisasContext *ctx, int rt, int rs)
     case 0x2d:
         switch (minor) {
         case SYNC:
-            /* NOP */
+            gen_sync(extract32(ctx->opcode, 16, 5));
             break;
         case SYSCALL:
             generate_exception_end(ctx, EXCP_SYSCALL);
@@ -17201,7 +17229,7 @@ static void decode_opc_special(CPUMIPSState *env, DisasContext *ctx)
         break;
     case OPC_SYNC:
         check_insn(ctx, ISA_MIPS2);
-        /* Treat as NOP. */
+        gen_sync(extract32(ctx->opcode, 6, 5));
         break;
 
 #if defined(TARGET_MIPS64)
diff --git a/target-mips/translate_init.c b/target-mips/translate_init.c
index 39ed5c4c1b..6ae23e476f 100644
--- a/target-mips/translate_init.c
+++ b/target-mips/translate_init.c
@@ -255,6 +255,28 @@ static const mips_def_t mips_defs[] =
         .insn_flags = CPU_MIPS32R2 | ASE_MIPS16,
         .mmu_type = MMU_TYPE_R4000,
     },
+    {
+        .name = "24KEc",
+        .CP0_PRid = 0x00019600,
+        .CP0_Config0 = MIPS_CONFIG0 | (0x1 << CP0C0_AR) |
+                       (MMU_TYPE_R4000 << CP0C0_MT),
+        .CP0_Config1 = MIPS_CONFIG1 | (15 << CP0C1_MMU) |
+                       (0 << CP0C1_IS) | (3 << CP0C1_IL) | (1 << CP0C1_IA) |
+                       (0 << CP0C1_DS) | (3 << CP0C1_DL) | (1 << CP0C1_DA) |
+                       (1 << CP0C1_CA),
+        .CP0_Config2 = MIPS_CONFIG2,
+        .CP0_Config3 = MIPS_CONFIG3 | (1 << CP0C3_DSPP) | (0 << CP0C3_VInt),
+        .CP0_LLAddr_rw_bitmask = 0,
+        .CP0_LLAddr_shift = 4,
+        .SYNCI_Step = 32,
+        .CCRes = 2,
+        /* we have a DSP, but no FPU */
+        .CP0_Status_rw_bitmask = 0x1378FF1F,
+        .SEGBITS = 32,
+        .PABITS = 32,
+        .insn_flags = CPU_MIPS32R2 | ASE_MIPS16 | ASE_DSP,
+        .mmu_type = MMU_TYPE_R4000,
+    },
     {
         .name = "24Kf",
         .CP0_PRid = 0x00019300,