Merge remote-tracking branch 'remotes/vivier2/tags/linux-user-for-4.1-pull-request' into staging

GPROF fixes, GCC9 fixes, SIOCGIFNAME fix, new IPV6 sockopts, elf fix

# gpg: Signature made Fri 10 May 2019 11:45:23 BST
# gpg:                using RSA key F30C38BD3F2FBE3C
# gpg: Good signature from "Laurent Vivier <lvivier@redhat.com>" [full]
# gpg:                 aka "Laurent Vivier <laurent@vivier.eu>" [full]
# gpg:                 aka "Laurent Vivier (Red Hat) <lvivier@redhat.com>" [full]
# Primary key fingerprint: CD2F 75DD C8E3 A4DC 2E4F  5173 F30C 38BD 3F2F BE3C

* remotes/vivier2/tags/linux-user-for-4.1-pull-request:
  linux-user: fix GPROF build failure
  linux-user: avoid treading on gprof's SIGPROF signals
  linux-user: elf: Map empty PT_LOAD segments
  The ioctl(SIOCGIFNAME) call requires a struct ifreq.
  linux-user: avoid string truncation warnings in uname field copying
  linux-user/elfload: Fix GCC 9 build warnings
  linux-user: Add missing IPV6 sockopts

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

6 files changed, 69 insertions, 13 deletions

diff --git a/linux-user/elfload.c b/linux-user/elfload.c
index c1a2602..ef42e02 100644
--- a/linux-user/elfload.c
+++ b/linux-user/elfload.c
@@ -2366,11 +2366,19 @@ static void load_elf_image(const char *image_name, int image_fd,
             vaddr_ps = TARGET_ELF_PAGESTART(vaddr);
             vaddr_len = TARGET_ELF_PAGELENGTH(eppnt->p_filesz + vaddr_po);
 
-            error = target_mmap(vaddr_ps, vaddr_len,
-                                elf_prot, MAP_PRIVATE | MAP_FIXED,
-                                image_fd, eppnt->p_offset - vaddr_po);
-            if (error == -1) {
-                goto exit_perror;
+            /*
+             * Some segments may be completely empty without any backing file
+             * segment, in that case just let zero_bss allocate an empty buffer
+             * for it.
+             */
+            if (eppnt->p_filesz != 0) {
+                error = target_mmap(vaddr_ps, vaddr_len, elf_prot,
+                                    MAP_PRIVATE | MAP_FIXED,
+                                    image_fd, eppnt->p_offset - vaddr_po);
+
+                if (error == -1) {
+                    goto exit_perror;
+                }
             }
 
             vaddr_ef = vaddr + eppnt->p_filesz;
@@ -2872,7 +2880,7 @@ struct target_elf_prpsinfo {
     target_gid_t pr_gid;
     target_pid_t pr_pid, pr_ppid, pr_pgrp, pr_sid;
     /* Lots missing */
-    char    pr_fname[16];           /* filename of executable */
+    char    pr_fname[16] QEMU_NONSTRING; /* filename of executable */
     char    pr_psargs[ELF_PRARGSZ]; /* initial part of arg list */
 };
 
diff --git a/linux-user/exit.c b/linux-user/exit.c
index 14e94e2..bdda720 100644
--- a/linux-user/exit.c
+++ b/linux-user/exit.c
@@ -18,6 +18,9 @@
  */
 #include "qemu/osdep.h"
 #include "qemu.h"
+#ifdef TARGET_GPROF
+#include <sys/gmon.h>
+#endif
 
 #ifdef CONFIG_GCOV
 extern void __gcov_dump(void);
diff --git a/linux-user/ioctls.h b/linux-user/ioctls.h
index ae89516..37501f5 100644
--- a/linux-user/ioctls.h
+++ b/linux-user/ioctls.h
@@ -178,7 +178,7 @@
 #endif /* CONFIG_USBFS */
 
   IOCTL(SIOCATMARK, IOC_R, MK_PTR(TYPE_INT))
-  IOCTL(SIOCGIFNAME, IOC_RW, MK_PTR(TYPE_INT))
+  IOCTL(SIOCGIFNAME, IOC_RW, MK_PTR(MK_STRUCT(STRUCT_int_ifreq)))
   IOCTL(SIOCGIFFLAGS, IOC_W | IOC_R, MK_PTR(MK_STRUCT(STRUCT_short_ifreq)))
   IOCTL(SIOCSIFFLAGS, IOC_W, MK_PTR(MK_STRUCT(STRUCT_short_ifreq)))
   IOCTL(SIOCGIFADDR, IOC_W | IOC_R, MK_PTR(MK_STRUCT(STRUCT_sockaddr_ifreq)))
diff --git a/linux-user/signal.c b/linux-user/signal.c
index e2c0b37..44b2d3b 100644
--- a/linux-user/signal.c
+++ b/linux-user/signal.c
@@ -508,6 +508,11 @@ void signal_init(void)
     act.sa_flags = SA_SIGINFO;
     act.sa_sigaction = host_signal_handler;
     for(i = 1; i <= TARGET_NSIG; i++) {
+#ifdef TARGET_GPROF
+        if (i == SIGPROF) {
+            continue;
+        }
+#endif
         host_sig = target_to_host_signal(i);
         sigaction(host_sig, NULL, &oact);
         if (oact.sa_sigaction == (void *)SIG_IGN) {
diff --git a/linux-user/syscall.c b/linux-user/syscall.c
index 96cd4bf..f5ff6f5 100644
--- a/linux-user/syscall.c
+++ b/linux-user/syscall.c
@@ -59,9 +59,6 @@
 #ifdef CONFIG_TIMERFD
 #include <sys/timerfd.h>
 #endif
-#ifdef TARGET_GPROF
-#include <sys/gmon.h>
-#endif
 #ifdef CONFIG_EVENTFD
 #include <sys/eventfd.h>
 #endif
@@ -1864,6 +1861,28 @@ static abi_long do_setsockopt(int sockfd, int level, int optname,
         case IPV6_RECVHOPLIMIT:
         case IPV6_2292HOPLIMIT:
         case IPV6_CHECKSUM:
+        case IPV6_ADDRFORM:
+        case IPV6_2292PKTINFO:
+        case IPV6_RECVTCLASS:
+        case IPV6_RECVRTHDR:
+        case IPV6_2292RTHDR:
+        case IPV6_RECVHOPOPTS:
+        case IPV6_2292HOPOPTS:
+        case IPV6_RECVDSTOPTS:
+        case IPV6_2292DSTOPTS:
+        case IPV6_TCLASS:
+#ifdef IPV6_RECVPATHMTU
+        case IPV6_RECVPATHMTU:
+#endif
+#ifdef IPV6_TRANSPARENT
+        case IPV6_TRANSPARENT:
+#endif
+#ifdef IPV6_FREEBIND
+        case IPV6_FREEBIND:
+#endif
+#ifdef IPV6_RECVORIGDSTADDR
+        case IPV6_RECVORIGDSTADDR:
+#endif
             val = 0;
             if (optlen < sizeof(uint32_t)) {
                 return -TARGET_EINVAL;
@@ -2358,6 +2377,28 @@ static abi_long do_getsockopt(int sockfd, int level, int optname,
         case IPV6_RECVHOPLIMIT:
         case IPV6_2292HOPLIMIT:
         case IPV6_CHECKSUM:
+        case IPV6_ADDRFORM:
+        case IPV6_2292PKTINFO:
+        case IPV6_RECVTCLASS:
+        case IPV6_RECVRTHDR:
+        case IPV6_2292RTHDR:
+        case IPV6_RECVHOPOPTS:
+        case IPV6_2292HOPOPTS:
+        case IPV6_RECVDSTOPTS:
+        case IPV6_2292DSTOPTS:
+        case IPV6_TCLASS:
+#ifdef IPV6_RECVPATHMTU
+        case IPV6_RECVPATHMTU:
+#endif
+#ifdef IPV6_TRANSPARENT
+        case IPV6_TRANSPARENT:
+#endif
+#ifdef IPV6_FREEBIND
+        case IPV6_FREEBIND:
+#endif
+#ifdef IPV6_RECVORIGDSTADDR
+        case IPV6_RECVORIGDSTADDR:
+#endif
             if (get_user_u32(len, optlen))
                 return -TARGET_EFAULT;
             if (len < 0)
diff --git a/linux-user/uname.c b/linux-user/uname.c
index 313b79d..1c05f95 100644
--- a/linux-user/uname.c
+++ b/linux-user/uname.c
@@ -72,9 +72,8 @@ const char *cpu_to_uname_machine(void *cpu_env)
 
 #define COPY_UTSNAME_FIELD(dest, src) \
   do { \
-      /* __NEW_UTS_LEN doesn't include terminating null */ \
-      (void) strncpy((dest), (src), __NEW_UTS_LEN); \
-      (dest)[__NEW_UTS_LEN] = '\0'; \
+      memcpy((dest), (src), MIN(sizeof(src), sizeof(dest))); \
+      (dest)[sizeof(dest) - 1] = '\0'; \
   } while (0)
 
 int sys_uname(struct new_utsname *buf)