FreeBSD: switch to FreeBSD 12 versions of syscalls for fstat etc

This was a change that enabled 64bit inodes (ino64).

Also a couple of typos in READMEs.

README_MISSING_SYSCALL_OR_IOCTL

@@ -19,7 +19,7 @@ What are syscall/ioctl wrappers?  What do they do?
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 Valgrind does what it does, in part, by keeping track of everything your
 program does.  When a system call happens, for example a request to read
-part of a file, control passes to the Linux kernel, which fulfills the
+part of a file, control passes to the Linux kernel, which fulfils the
 request, and returns control to your program.  The problem is that the
 kernel will often change the status of some part of your program's memory
 as a result, and tools (instrumentation plug-ins) may need to know about
@@ -29,7 +29,7 @@ Syscall and ioctl wrappers have two jobs:
 
 1. Tell a tool what's about to happen, before the syscall takes place.  A
    tool could perform checks beforehand, eg. if memory about to be written
-   is actually writeable.  This part is useful, but not strictly
+   is actually writable.  This part is useful, but not strictly
    essential.
 
 2. Tell a tool what just happened, after a syscall takes place.  This is

coregrind/m_aspacemgr/aspacemgr-common.c

@@ -386,10 +386,11 @@ Bool ML_(am_get_fd_d_i_m)( Int fd,
    }
    return False;
 #  elif defined(VGO_freebsd)
+#if (FREEBSD_VERS < FREEBSD_12)
    struct vki_freebsd11_stat buf;
-#if (FREEBSD_VERS >= FREEBSD_12)
-   SysRes res = VG_(do_syscall2)(__NR_freebsd11_fstat, fd, (UWord)&buf);
+   SysRes res = VG_(do_syscall2)(__NR_fstat, fd, (UWord)&buf);
 #else
+   struct vki_stat buf;
    SysRes res = VG_(do_syscall2)(__NR_fstat, fd, (UWord)&buf);
 #endif
    if (!sr_isError(res)) {

coregrind/m_libcfile.c

@@ -260,8 +260,13 @@ SysRes VG_(mknod) ( const HChar* pathname, Int mode, UWord dev )
    SysRes res = VG_(do_syscall3)(__NR_mknod,
                                  (UWord)pathname, mode, dev);
 #  elif defined(VGO_freebsd)
+#if (FREEBSD_VERS < FREEBSD_12)
    SysRes res = VG_(do_syscall3)(__NR_freebsd11_mknod,
                                  (UWord)pathname, mode, dev);
+#else
+   SysRes res = VG_(do_syscall4)(__NR_mknodat, VKI_AT_FDCWD,
+                                 (UWord)pathname, mode, dev);
+#endif
 #  elif defined(VGO_solaris)
    SysRes res = VG_(do_syscall4)(__NR_mknodat,
                                  VKI_AT_FDCWD, (UWord)pathname, mode, dev);
@@ -556,11 +561,12 @@ SysRes VG_(stat) ( const HChar* file_name, struct vg_stat* vgbuf )
    }
 #  elif defined(VGO_freebsd)
    {
+#if (FREEBSD_VERS < FREEBSD_12)
       struct vki_freebsd11_stat buf;
-#if (FREEBSD_VERS >= FREEBSD_12)
-      res = VG_(do_syscall2)(__NR_freebsd11_stat, (UWord)file_name, (UWord)&buf);
-#else
       res = VG_(do_syscall2)(__NR_stat, (UWord)file_name, (UWord)&buf);
+#else
+      struct vki_stat buf;
+      res = VG_(do_syscall4)(__NR_fstatat, VKI_AT_FDCWD, (UWord)file_name, (UWord)&buf, 0);
 #endif
       if (!sr_isError(res)) {
          TRANSLATE_TO_vg_stat(vgbuf, &buf);
@@ -632,10 +638,11 @@ Int VG_(fstat) ( Int fd, struct vg_stat* vgbuf )
    }
 #  elif defined(VGO_freebsd)
    {
+#if (FREEBSD_VERS < FREEBSD_12)
      struct vki_freebsd11_stat buf;
-#if (FREEBSD_VERS >= FREEBSD_12)
-     res = VG_(do_syscall2)(__NR_freebsd11_fstat, (RegWord)fd, (RegWord)(Addr)&buf);
+     res = VG_(do_syscall2)(__NR_fstat, (RegWord)fd, (RegWord)(Addr)&buf);
 #else
+      struct vki_stat buf;
      res = VG_(do_syscall2)(__NR_fstat, (RegWord)fd, (RegWord)(Addr)&buf);
 #endif
      if (!sr_isError(res)) {
@@ -655,11 +662,12 @@ SysRes VG_(lstat) ( const HChar* file_name, struct vg_stat* vgbuf )
    SysRes res;
    VG_(memset)(vgbuf, 0, sizeof(*vgbuf));
 
+#if (FREEBSD_VERS < FREEBSD_12)
    struct vki_freebsd11_stat buf;
-#if (FREEBSD_VERS >= FREEBSD_12)
-   res = VG_(do_syscall2)(__NR_freebsd11_lstat, (UWord)file_name, (UWord)&buf);
-#else
    res = VG_(do_syscall2)(__NR_lstat, (UWord)file_name, (UWord)&buf);
+#else
+   struct vki_stat buf;
+   res = VG_(do_syscall4)(__NR_fstatat, VKI_AT_FDCWD, (UWord)file_name, (UWord)&buf, VKI_AT_SYMLINK_NOFOLLOW);
 #endif
    if (!sr_isError(res)) {
       TRANSLATE_TO_vg_stat(vgbuf, &buf);

include/vki/vki-freebsd.h

@@ -1558,6 +1558,8 @@ struct vki_dirent {
 #define VKI_O_SEARCH	O_EXEC
 
 #define VKI_AT_FDCWD            AT_FDCWD
+#define VKI_AT_SYMLINK_NOFOLLOW 0x0200
+
 
 #define VKI_F_DUPFD     0  /* dup */
 #define VKI_F_GETFD     1  /* get close_on_exec */