[RFA:] Support lstat as simulator call.

[Hans-Peter Nilsson <hans-peter dot nilsson at axis dot com>]

Covered by the (to-be-submitted) CRIS C testsuite.
Ok to commit?

sim/common:
	* syscall.c (cb_syscall) <case CB_SYS_lstat>: New case.
	* callback.c (os_lstat): New function.

include/gdb:
	* callback.h (struct host_callback_struct): New member lstat.
	(CB_SYS_lstat): New macro.

Index: callback.h
===================================================================
RCS file: /cvs/src/src/include/gdb/callback.h,v
retrieving revision 1.3
diff -c -p -r1.3 callback.h
*** callback.h	25 Jun 2004 16:48:01 -0000	1.3
--- callback.h	7 Dec 2004 01:41:07 -0000
*************** struct host_callback_struct 
*** 93,98 ****
--- 93,99 ----
    void (*flush_stderr) PARAMS ((host_callback *));
    int (*stat) PARAMS ((host_callback *, const char *, struct stat *));
    int (*fstat) PARAMS ((host_callback *, int, struct stat *));
+   int (*lstat) PARAMS ((host_callback *, const char *, struct stat *));
    int (*ftruncate) PARAMS ((host_callback *, int, long));
    int (*truncate) PARAMS ((host_callback *, const char *, long));
  
*************** extern host_callback default_callback;
*** 188,193 ****
--- 189,197 ----
  #define CB_SYS_chmod 	16
  #define CB_SYS_utime 	17
  #define CB_SYS_time 	18
+ 
+ /* More standard syscalls.  */
+ #define CB_SYS_lstat    19
  
  /* Struct use to pass and return information necessary to perform a
     system call.  */

Index: callback.c
===================================================================
RCS file: /cvs/src/src/sim/common/callback.c,v
retrieving revision 1.12
diff -c -p -r1.12 callback.c
*** callback.c	3 Dec 2004 23:34:55 -0000	1.12
--- callback.c	6 Dec 2004 17:10:25 -0000
*************** os_fstat (p, fd, buf)
*** 407,412 ****
--- 407,422 ----
    return wrap (p, fstat (fdmap (p, fd), buf));
  }
  
+ static int
+ os_lstat (p, file, buf)
+      host_callback *p;
+      const char *file;
+      struct stat *buf;
+ {
+   /* ??? Same issue here as with os_fstat.  */
+   return (p, lstat (file, buf));
+ }
+ 
  static int 
  os_ftruncate (p, fd, len)
       host_callback *p;
*************** host_callback default_callback =
*** 589,594 ****
--- 599,605 ----
  
    os_stat,
    os_fstat,
+   os_lstat,
  
    os_ftruncate,
    os_truncate,
Index: syscall.c
===================================================================
RCS file: /cvs/src/src/sim/common/syscall.c,v
retrieving revision 1.3
diff -c -p -r1.3 syscall.c
*** syscall.c	10 May 2004 16:18:03 -0000	1.3
--- syscall.c	6 Dec 2004 17:10:25 -0000
*************** cb_syscall (cb, sc)
*** 444,449 ****
--- 471,520 ----
        }
        break;
  
+     case CB_SYS_lstat :
+       {
+ 	char *path, *buf;
+ 	int buflen;
+ 	struct stat statbuf;
+ 	TADDR addr = sc->arg2;
+ 
+ 	errcode = get_path (cb, sc, sc->arg1, &path);
+ 	if (errcode != 0)
+ 	  {
+ 	    result = -1;
+ 	    goto FinishSyscall;
+ 	  }
+ 	result = (*cb->lstat) (cb, path, &statbuf);
+ 	free (path);
+ 	if (result < 0)
+ 	  goto ErrorFinish;
+ 
+ 	buflen = cb_host_to_target_stat (cb, NULL, NULL);
+ 	buf = xmalloc (buflen);
+ 	if (cb_host_to_target_stat (cb, &statbuf, buf) != buflen)
+ 	  {
+ 	    /* The translation failed.  This is due to an internal
+ 	       host program error, not the target's fault.
+ 	       Unfortunately, it's hard to test this case, so there's no
+ 	       test-case for this execution path.  */
+ 	    free (buf);
+ 	    errcode = ENOSYS;
+ 	    result = -1;
+ 	    goto FinishSyscall;
+ 	  }
+ 
+ 	if ((*sc->write_mem) (cb, sc, addr, buf, buflen) != buflen)
+ 	  {
+ 	    free (buf);
+ 	    errcode = EINVAL;
+ 	    result = -1;
+ 	    goto FinishSyscall;
+ 	  }
+ 
+ 	free (buf);
+       }
+       break;
+ 
      case CB_SYS_time :
        {
  	/* FIXME: May wish to change CB_SYS_time to something else.

brgds, H-P