Merge remote-tracking branch 'remotes/riku/tags/pull-linux-user-20160111' into staging

January 2016 Linux-user queque

# gpg: Signature made Mon 11 Jan 2016 14:13:57 GMT using RSA key ID DE3C9BC0
# gpg: Good signature from "Riku Voipio <riku.voipio@iki.fi>"
# gpg:                 aka "Riku Voipio <riku.voipio@linaro.org>"

* remotes/riku/tags/pull-linux-user-20160111:
  linux-user/mmap.c: Use end instead of real_end in target_mmap
  linux-user: Add SOCKOP_sendmmsg and SOCKOP_recvmmsg socket call, wire them up.
  linux-user: Update m68k syscall definitions to match Linux 4.4.
  linux-user/syscall.c: Use SOL_SOCKET instead of level for setsockopt()
  linux-user: enable sigaltstack for all architectures
  unicore32: convert get_sp_from_cpustate from macro to inline
  linux-user/mmap.c: Always zero MAP_ANONYMOUS memory in mmap_frag()
  linux-user,sh4: fix signal retcode address
  linux-user: check fd is >= 0 in fd_trans_host_to_target_data/fd_trans_host_to_target_addr
  linux-user: manage bind with a socket of SOCK_PACKET type.
  linux-user: add a function hook to translate sockaddr
  linux-user: rename TargetFdFunc to TargetFdDataFunc, and structure fields accordingly
  linux-user: SOCK_PACKET uses network endian to encode protocol in socket()
  linux-user/syscall.c: malloc()/calloc() to g_malloc()/g_try_malloc()/g_new0()
  linux-user: in poll(), if nfds is 0, pfd can be NULL
  linux-user: correctly align target_epoll_event
  linux-user: add signalfd/signalfd4 syscalls

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

linux-user/m68k/syscall_nr.h

@@ -349,3 +349,30 @@
 #define TARGET_NR_process_vm_writev     346
 #define TARGET_NR_kcmp                  347
 #define TARGET_NR_finit_module          348
+#define TARGET_NR_sched_setattr         349
+#define TARGET_NR_sched_getattr         350
+#define TARGET_NR_renameat2             351
+#define TARGET_NR_getrandom             352
+#define TARGET_NR_memfd_create          353
+#define TARGET_NR_bpf                   354
+#define TARGET_NR_execveat              355
+#define TARGET_NR_socket                356
+#define TARGET_NR_socketpair            357
+#define TARGET_NR_bind                  358
+#define TARGET_NR_connect               359
+#define TARGET_NR_listen                360
+#define TARGET_NR_accept4               361
+#define TARGET_NR_getsockopt            362
+#define TARGET_NR_setsockopt            363
+#define TARGET_NR_getsockname           364
+#define TARGET_NR_getpeername           365
+#define TARGET_NR_sendto                366
+#define TARGET_NR_sendmsg               367
+#define TARGET_NR_recvfrom              368
+#define TARGET_NR_recvmsg               369
+#define TARGET_NR_shutdown              370
+#define TARGET_NR_recvmmsg              371
+#define TARGET_NR_sendmmsg              372
+#define TARGET_NR_userfaultfd           373
+#define TARGET_NR_membarrier            374
+#define TARGET_NR_mlock2                375

linux-user/mmap.c

@@ -186,10 +186,12 @@ static int mmap_frag(abi_ulong real_start,
         if (prot_new != (prot1 | PROT_WRITE))
             mprotect(host_start, qemu_host_page_size, prot_new);
     } else {
-        /* just update the protection */
         if (prot_new != prot1) {
             mprotect(host_start, qemu_host_page_size, prot_new);
         }
+        if (prot_new & PROT_WRITE) {
+            memset(g2h(start), 0, end - start);
+        }
     }
     return 0;
 }
@@ -536,7 +538,7 @@ abi_long target_mmap(abi_ulong start, abi_ulong len, int prot,
         /* handle the end of the mapping */
         if (end < real_end) {
             ret = mmap_frag(real_end - qemu_host_page_size,
-                            real_end - qemu_host_page_size, real_end,
+                            real_end - qemu_host_page_size, end,
                             prot, flags, fd,
                             offset + real_end - qemu_host_page_size - start);
             if (ret == -1)

linux-user/signal.c

@@ -3210,7 +3210,6 @@ static void setup_frame(int sig, struct target_sigaction *ka,
     struct target_sigframe *frame;
     abi_ulong frame_addr;
     int i;
-    int err = 0;
 
     frame_addr = get_sigframe(ka, regs->gregs[15], sizeof(*frame));
     trace_user_setup_frame(regs, frame_addr);
@@ -3229,15 +3228,14 @@ static void setup_frame(int sig, struct target_sigaction *ka,
         regs->pr = (unsigned long) ka->sa_restorer;
     } else {
         /* Generate return code (system call to sigreturn) */
+        abi_ulong retcode_addr = frame_addr +
+                                 offsetof(struct target_sigframe, retcode);
         __put_user(MOVW(2), &frame->retcode[0]);
         __put_user(TRAP_NOARG, &frame->retcode[1]);
         __put_user((TARGET_NR_sigreturn), &frame->retcode[2]);
-        regs->pr = (unsigned long) frame->retcode;
+        regs->pr = (unsigned long) retcode_addr;
     }
 
-    if (err)
-        goto give_sigsegv;
-
     /* Set up registers for signal handler */
     regs->gregs[15] = frame_addr;
     regs->gregs[4] = sig; /* Arg for signal handler */
@@ -3260,7 +3258,6 @@ static void setup_rt_frame(int sig, struct target_sigaction *ka,
     struct target_rt_sigframe *frame;
     abi_ulong frame_addr;
     int i;
-    int err = 0;
 
     frame_addr = get_sigframe(ka, regs->gregs[15], sizeof(*frame));
     trace_user_setup_rt_frame(regs, frame_addr);
@@ -3290,15 +3287,14 @@ static void setup_rt_frame(int sig, struct target_sigaction *ka,
         regs->pr = (unsigned long) ka->sa_restorer;
     } else {
         /* Generate return code (system call to sigreturn) */
+        abi_ulong retcode_addr = frame_addr +
+                                 offsetof(struct target_rt_sigframe, retcode);
         __put_user(MOVW(2), &frame->retcode[0]);
         __put_user(TRAP_NOARG, &frame->retcode[1]);
         __put_user((TARGET_NR_rt_sigreturn), &frame->retcode[2]);
-        regs->pr = (unsigned long) frame->retcode;
+        regs->pr = (unsigned long) retcode_addr;
     }
 
-    if (err)
-        goto give_sigsegv;
-
     /* Set up registers for signal handler */
     regs->gregs[15] = frame_addr;
     regs->gregs[4] = sig; /* Arg for signal handler */

linux-user/syscall_defs.h

@@ -28,6 +28,8 @@
 #define SOCKOP_sendmsg          16
 #define SOCKOP_recvmsg          17
 #define SOCKOP_accept4          18
+#define SOCKOP_recvmmsg         19
+#define SOCKOP_sendmmsg         20
 
 #define IPCOP_semop		1
 #define IPCOP_semget		2
@@ -2514,20 +2516,23 @@ struct target_mq_attr {
 #define FUTEX_CMD_MASK          ~(FUTEX_PRIVATE_FLAG | FUTEX_CLOCK_REALTIME)
 
 #ifdef CONFIG_EPOLL
+#if defined(TARGET_X86_64)
+#define TARGET_EPOLL_PACKED QEMU_PACKED
+#else
+#define TARGET_EPOLL_PACKED
+#endif
+
 typedef union target_epoll_data {
     abi_ulong ptr;
-    abi_ulong fd;
-    uint32_t u32;
-    uint64_t u64;
+    abi_int fd;
+    abi_uint u32;
+    abi_ullong u64;
 } target_epoll_data_t;
 
 struct target_epoll_event {
-    uint32_t events;
-#if defined(TARGET_ARM) || defined(TARGET_MIPS) || defined(TARGET_MIPS64)
-    uint32_t __pad;
-#endif
+    abi_uint events;
     target_epoll_data_t data;
-} QEMU_PACKED;
+} TARGET_EPOLL_PACKED;
 #endif
 struct target_rlimit64 {
     uint64_t rlim_cur;