Align libgloss/arm and libc/sys/arm sources: miscellaneous fixes

1. Trim trailing spaces
2. Align comments, function declarations and definitions

libgloss/arm/crt0.S

@@ -440,7 +440,7 @@ __change_mode:
 	beq	.LC10
 
 /* See whether we are scanning a string.  */
-	cmp	r3, #'"'
+	cmp	r3, #'\"'
 #ifdef __thumb__
 	beq	.LC20
 	cmp	r3, #'\''

libgloss/arm/syscalls.c

@@ -143,7 +143,7 @@ initialise_monitor_handles (void)
   int i;
   
   /* Open the standard file descriptors by opening the special
-   * teletype device, ":tt", read-only to obtain a descritpor for
+   * teletype device, ":tt", read-only to obtain a descriptor for
    * standard input and write-only to obtain a descriptor for standard
    * output. Finally, open ":tt" in append mode to obtain a descriptor
    * for standard error. Since this is a write mode, most kernels will
@@ -351,9 +351,7 @@ checkerror (int result)
    len, is the length in bytes to read. 
    Returns the number of bytes *not* written. */
 int
-_swiread (int fh,
-	  void * ptr,
-	  size_t len)
+_swiread (int fh, void * ptr, size_t len)
 {
 #ifdef ARM_RDI_MONITOR
   int block[3];
@@ -381,9 +379,7 @@ _swiread (int fh,
    Translates the return of _swiread into
    bytes read. */
 int __attribute__((weak))
-_read (int fd,
-       void * ptr,
-       size_t len)
+_read (int fd, void * ptr, size_t len)
 {
   int res;
   struct fdent *pfd;
@@ -409,9 +405,7 @@ _read (int fd,
 
 /* fd, is a user file descriptor. */
 off_t
-_swilseek (int fd,
-	off_t ptr,
-	int dir)
+_swilseek (int fd, off_t ptr, int dir)
 {
   off_t res;
   struct fdent *pfd;
@@ -494,9 +488,7 @@ _swilseek (int fd,
 }
 
 off_t
-_lseek (int fd,
-	off_t ptr,
-	int dir)
+_lseek (int fd, off_t ptr, int dir)
 {
   return _swilseek (fd, ptr, dir);
 }
@@ -504,10 +496,7 @@ _lseek (int fd,
 /* fh, is a valid internal file handle.
    Returns the number of bytes *not* written. */
 int
-_swiwrite (
-	   int    fh,
-	   const void * ptr,
-	   size_t    len)
+_swiwrite (int fh, const void * ptr, size_t len)
 {
 #ifdef ARM_RDI_MONITOR
   int block[3];
@@ -533,9 +522,7 @@ _swiwrite (
 
 /* fd, is a user file descriptor. */
 int __attribute__((weak))
-_write (int    fd,
-	const void * ptr,
-	size_t    len)
+_write (int fd, const void * ptr, size_t len)
 {
   int res;
   struct fdent *pfd;
@@ -611,8 +598,7 @@ _swiopen (const char * path, int flags)
 
   if (flags & O_APPEND)
     {
-      /* Can't ask for w AND a; means just 'a'.  */
-      aflags &= ~4;
+      aflags &= ~4; /* Can't ask for w AND a; means just 'a'.  */
       aflags |= 8;
     }
 
@@ -784,8 +770,8 @@ _stat (const char *fname, struct stat *st)
 {
   int fd, res;
   memset (st, 0, sizeof (* st));
-  /* The best we can do is try to open the file readonly.  
-     If it exists, then we can guess a few things about it. */
+  /* The best we can do is try to open the file readonly.  If it exists,
+     then we can guess a few things about it.  */
   if ((fd = _open (fname, O_RDONLY)) == -1)
     return -1;
   st->st_mode |= S_IFREG | S_IREAD;

newlib/libc/sys/arm/arm.h

@@ -85,6 +85,6 @@
 #define CPSR_F_MASK			0x40	/* FIQ bit.  */
 #define CPSR_I_MASK			0x80	/* IRQ bit.  */
 
-#define CPSR_M_MASK			0x0F	/* Mode mask except M[4] */
+#define CPSR_M_MASK			0x0F	/* Mode mask except M[4].  */
 
 #endif /* _LIBGLOSS_ARM_H */

newlib/libc/sys/arm/syscalls.c

@@ -115,6 +115,16 @@ initialise_monitor_handles (void)
 {
   int i;
   
+  /* Open the standard file descriptors by opening the special
+   * teletype device, ":tt", read-only to obtain a descriptor for
+   * standard input and write-only to obtain a descriptor for standard
+   * output. Finally, open ":tt" in append mode to obtain a descriptor
+   * for standard error. Since this is a write mode, most kernels will
+   * probably return the same value as for standard output, but the
+   * kernel can differentiate the two using the mode flag and return a
+   * different descriptor for standard error.
+   */
+
 #ifdef ARM_RDI_MONITOR
   int volatile block[3];
 
@@ -168,6 +178,7 @@ get_errno (void)
 #endif
 }
 
+/* Set errno and return result. */
 static int
 error (int result)
 {
@@ -183,7 +194,10 @@ wrap (int result)
   return result;
 }
 
-/* Returns # chars not! written.  */
+/* file, is a valid user file handle.
+   ptr, is a null terminated string.
+   len, is the length in bytes to read. 
+   Returns the number of bytes *not* written. */
 int
 _swiread (int file, void * ptr, size_t len)
 {
@@ -207,6 +221,9 @@ _swiread (int file, void * ptr, size_t len)
 #endif
 }
 
+/* file, is a valid user file handle.
+   Translates the return of _swiread into
+   bytes read. */
 int __attribute__((weak))
 _read (int file, void * ptr, size_t len)
 {
@@ -223,15 +240,13 @@ _read (int file, void * ptr, size_t len)
   return len - x;
 }
 
+/* file, is a user file descriptor. */
 off_t
 _swilseek (int file, off_t ptr, int dir)
 {
   _off_t res;
   int fh = remap_handle (file);
   int slot = findslot (fh);
-#ifdef ARM_RDI_MONITOR
-  int block[2];
-#endif
 
   if (dir == SEEK_CUR)
     {
@@ -249,6 +264,7 @@ _swilseek (int file, off_t ptr, int dir)
     }
 
 #ifdef ARM_RDI_MONITOR
+  int block[2];
   if (dir == SEEK_END)
     {
       block[0] = fh;
@@ -294,7 +310,8 @@ _lseek (int file, off_t ptr, int dir)
   return wrap (_swilseek (file, ptr, dir));
 }
 
-/* Returns #chars not! written.  */
+/* file, is a valid internal file handle.
+   Returns the number of bytes *not* written. */
 int
 _swiwrite (int file, const void * ptr, size_t len)
 {
@@ -319,6 +336,7 @@ _swiwrite (int file, const void * ptr, size_t len)
 #endif
 }
 
+/* file, is a user file descriptor. */
 int __attribute__((weak))
 _write (int file, const void * ptr, size_t len)
 {
@@ -527,7 +545,7 @@ _sbrk (ptrdiff_t incr)
 
 extern void memset (struct stat *, int, unsigned int);
 
-int
+int __attribute__((weak))
 _fstat (int file, struct stat * st)
 {
   memset (st, 0, sizeof (* st));
@@ -537,7 +555,8 @@ _fstat (int file, struct stat * st)
   file = file;
 }
 
-int _stat (const char *fname, struct stat *st)
+int __attribute__((weak))
+_stat (const char *fname, struct stat *st)
 {
   int file;
 
@@ -553,16 +572,15 @@ int _stat (const char *fname, struct stat *st)
   return 0;
 }
 
-int
-_link (const char *__path1 __attribute__ ((unused)),
-       const char *__path2 __attribute__ ((unused)))
+int __attribute__((weak))
+_link (const char *__path1 __attribute__ ((unused)), const char *__path2 __attribute__ ((unused)))
 {
   errno = ENOSYS;
   return -1;
 }
 
 int
-_unlink (const char *path __attribute__ ((unused)))
+_unlink (const char *path)
 {
 #ifdef ARM_RDI_MONITOR
   int block[2];