[qemu-usermode] Update to 4.0.1. JB#45765

.gitmodules

@@ -0,0 +1,3 @@
+[submodule "upstream"]
+	path = upstream
+	url = https://git.sailfishos.org/mirror/qemu.git

rpm/0001-Revert-linux-user-Use-safe_syscall-for-open-and-open.patch

@@ -0,0 +1,64 @@
+From 25ff0573a73123d71e10ec4849ac9177ea53ac59 Mon Sep 17 00:00:00 2001
+From: Frajo Haider <f_haider@gmx.at>
+Date: Wed, 22 Jan 2020 10:47:20 +0200
+Subject: [PATCH 1/9] Revert "linux-user: Use safe_syscall for open and openat
+ system calls"
+
+This reverts commit c10a07387b77b94d8f7233f3b5bb559211d4e49a.
+---
+ linux-user/syscall.c | 18 ++++++++++++++----
+ 1 file changed, 14 insertions(+), 4 deletions(-)
+
+diff --git a/linux-user/syscall.c b/linux-user/syscall.c
+index 96cd4bf86d..17b13f0ca3 100644
+--- a/linux-user/syscall.c
++++ b/linux-user/syscall.c
+@@ -362,6 +362,18 @@ static int sys_getcwd1(char *buf, size_t size)
+   return strlen(buf)+1;
+ }
+
++static int sys_openat(int dirfd, const char *pathname, int flags, mode_t mode)
++{
++  /*
++   * open(2) has extra parameter 'mode' when called with
++   * flag O_CREAT.
++   */
++  if ((flags & O_CREAT) != 0) {
++      return (openat(dirfd, pathname, flags, mode));
++  }
++  return (openat(dirfd, pathname, flags));
++}
++
+ #ifdef TARGET_NR_utimensat
+ #if defined(__NR_utimensat)
+ #define __NR_sys_utimensat __NR_utimensat
+@@ -718,8 +730,6 @@ static type safe_##name(type1 arg1, type2 arg2, type3 arg3, type4 arg4, \
+
+ safe_syscall3(ssize_t, read, int, fd, void *, buff, size_t, count)
+ safe_syscall3(ssize_t, write, int, fd, const void *, buff, size_t, count)
+-safe_syscall4(int, openat, int, dirfd, const char *, pathname, \
+-              int, flags, mode_t, mode)
+ safe_syscall4(pid_t, wait4, pid_t, pid, int *, status, int, options, \
+               struct rusage *, rusage)
+ safe_syscall5(int, waitid, idtype_t, idtype, id_t, id, siginfo_t *, infop, \
+@@ -6816,7 +6826,7 @@ static int do_openat(void *cpu_env, int dirfd, const char *pathname, int flags,
+
+     if (is_proc_myself(pathname, "exe")) {
+         int execfd = qemu_getauxval(AT_EXECFD);
+-        return execfd ? execfd : safe_openat(dirfd, exec_path, flags, mode);
++        return execfd ? execfd : sys_openat(dirfd, exec_path, flags, mode);
+     }
+
+     for (fake_open = fakes; fake_open->filename; fake_open++) {
+@@ -6852,7 +6862,7 @@ static int do_openat(void *cpu_env, int dirfd, const char *pathname, int flags,
+         return fd;
+     }
+
+-    return safe_openat(dirfd, path(pathname), flags, mode);
++    return sys_openat(dirfd, path(pathname), flags, mode);
+ }
+
+ #define TIMER_MAGIC 0x0caf0000
+-- 
+2.20.1
+