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__sigtramp2.S revision 1.1 
      1 /*	$NetBSD: __sigtramp2.S,v 1.1 2003/10/07 17:08:07 skd Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 1994, 1995, 1996 Carnegie-Mellon University.
      5  * All rights reserved.
      6  *
      7  * Author: Chris G. Demetriou
      8  *
      9  * Permission to use, copy, modify and distribute this software and
     10  * its documentation is hereby granted, provided that both the copyright
     11  * notice and this permission notice appear in all copies of the
     12  * software, derivative works or modified versions, and any portions
     13  * thereof, and that both notices appear in supporting documentation.
     14  *
     15  * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
     16  * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
     17  * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
     18  *
     19  * Carnegie Mellon requests users of this software to return to
     20  *
     21  *  Software Distribution Coordinator  or  Software.Distribution (at) CS.CMU.EDU
     22  *  School of Computer Science
     23  *  Carnegie Mellon University
     24  *  Pittsburgh PA 15213-3890
     25  *
     26  * any improvements or extensions that they make and grant Carnegie the
     27  * rights to redistribute these changes.
     28  */
     29 
     30 #include "SYS.h"
     31 
     32 /*
     33  * The Alpha signal trampoline is invoked only to return from
     34  * the signal; the kernel calls the signal handler directly.
     35  *
     36  * On entry, the stack looks like:
     37  *
     38  *		ucontext structure	[128] == sp + sizeof(siginfo_t)]
     39  *	sp->	siginfo structure	[0]
     40  */
     41 NESTED_NOPROFILE(__sigtramp_siginfo_2,0,0,ra,0,0)
     42 	lda	a0,(128)(sp)		/* get pointer to ucontext */
     43 	CALLSYS_NOERROR(setcontext)	/* and call setcontext() with it */
     44 	mov	v0, a0			/* if that failed, get error code */
     45 	CALLSYS_NOERROR(exit)		/* and call exit() with it */
     46 END(__sigtramp_siginfo_2)
     47