[PATCH] _exit.c, exit vs. exit_group

[Carlos O'Donell]

libc-alpha,

Compiling with 2.6 headers, and booting into a 2.4 kernel without
exit_group should be allowed. Although ABORT_INSTRUCTION does end the
execution of the process, it's architecture dependant and not always a
pretty thing.

c.

2003-12-17  Carlos O'Donell  <carlos@baldric.uwo.ca>

	* sysdeps/unix/sysv/linux/_exit.c (_exit): Fallback to exit
	syscall. 

Index: sysdeps/unix/sysv/linux/_exit.c
===================================================================
RCS file: /cvs/glibc/libc/sysdeps/unix/sysv/linux/_exit.c,v
retrieving revision 1.6
diff -u -p -r1.6 _exit.c
--- sysdeps/unix/sysv/linux/_exit.c	3 Sep 2003 03:21:26 -0000	1.6
+++ sysdeps/unix/sysv/linux/_exit.c	17 Dec 2003 15:19:24 -0000
@@ -30,9 +30,12 @@ _exit (status)
   while (1)
     {
 #ifdef __NR_exit_group
-      INLINE_SYSCALL (exit_group, 1, status);
+      INTERNAL_SYSCALL_DECL (err);
+      int r = INTERNAL_SYSCALL (exit_group, err, 1, status);
+      /* Fall back on the old syscall if -ENOSYS */
+      if (INTERNAL_SYSCALL_ERRNO (r, err) == ENOSYS)
 #endif
-      INLINE_SYSCALL (exit, 1, status);
+        INLINE_SYSCALL (exit, 1, status);
 
 #ifdef ABORT_INSTRUCTION
       ABORT_INSTRUCTION;