libgloss: bfin: implement getpid/fstat/stat/link/unlink syscalls

The current syscalls.c implements getpid/fstat/stat/link/unlink as mere
stubs.  So replace them with useful calls to do_syscall now that our sim
can support them.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>

libgloss/ChangeLog

@@ -1,3 +1,16 @@
+2011-07-01  Mike Frysinger  <vapier@gentoo.org>
+
+	* bfin/syscalls.c (_getpid): Call do_syscall with func argument n and
+	return the result.
+	(_fstat): Delete stub body.  Add block array and assign file/st to it.
+	Call do_syscall with result.
+	(_stat): Delete stub body.  Add block array and assign fname/st to
+	it.  Call do_syscall with result.
+	(_link): Change func arguments to accept two strings.  Add block array
+	and assign existing/new to it.  Call do_syscall with result.
+	(_unlink): Change func arguments to accept a string.  Call do_syscall
+	with new argument.
+
 2011-07-01  Mike Frysinger  <vapier@gentoo.org>
 
 	* bfin/syscalls.c (_lseek): Change 3rd arg name to whence.  Increase

libgloss/bfin/syscalls.c

@@ -117,7 +117,7 @@ _kill (int n, int m)
 int
 _getpid (int n)
 {
-  return 1;
+  return do_syscall (SYS_getpid, &n);
 }
 
 caddr_t
@@ -156,40 +156,41 @@ _sbrk (int incr)
 extern void memset (struct stat *, int, unsigned int);
 
 int
-_fstat (int file, struct stat * st)
+_fstat (int file, struct stat *st)
 {
-  memset (st, 0, sizeof (* st));
+  int block[2];
-  st->st_mode = S_IFCHR;
+
-  st->st_blksize = 1024;
+  block[0] = file;
-  return 0;
+  block[1] = (int) st;
+
+  return do_syscall (SYS_fstat, block);
 }
 
 int _stat (const char *fname, struct stat *st)
 {
-  int file;
+  int block[2];
 
-  /* The best we can do is try to open the file readonly.  If it exists,
+  block[0] = (int) fname;
-     then we can guess a few things about it.  */
+  block[1] = (int) st;
-  if ((file = _open (fname, O_RDONLY)) < 0)
-    return -1;
 
-  memset (st, 0, sizeof (* st));
+  return do_syscall (SYS_stat, block);
-  st->st_mode = S_IFREG | S_IREAD;
-  st->st_blksize = 1024;
-  _close (file); /* Not interested in the error.  */
-  return 0;
 }
 
 int
-_link (void)
+_link (const char *existing, const char *new)
 {
-  return -1;
+  int block[2];
+
+  block[0] = (int) existing;
+  block[1] = (int) new;
+
+  return do_syscall (SYS_link, block);
 }
 
 int
-_unlink (void)
+_unlink (const char *path)
 {
-  return -1;
+  return do_syscall (SYS_unlink, path);
 }
 
 void