1 /* $NetBSD: saveregs.S,v 1.1 2005/12/20 19:28:50 christos Exp $ */
4 * Copyright (c) 1992, 1993
5 * The Regents of the University of California. All rights reserved.
7 * This software was developed by the Computer Systems Engineering group
8 * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
9 * contributed to Berkeley.
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12 * modification, are permitted provided that the following conditions
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15 * notice, this list of conditions and the following disclaimer.
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19 * 3. Neither the name of the University nor the names of its contributors
20 * may be used to endorse or promote products derived from this software
21 * without specific prior written permission.
23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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35 * from: Header: saveregs.s,v 1.1 91/07/06 17:22:33 torek Exp
38 #include <machine/asm.h>
39 #if defined(LIBC_SCCS) && !defined(lint)
40 RCSID("$NetBSD: saveregs.S,v 1.1 2005/12/20 19:28:50 christos Exp $")
41 #endif /* LIBC_SCCS and not lint */
44 * Save register arguments in caller's `arg dump' area, so that
45 * stdarg functions work.
47 * This really should be done with a pointer to the arg dump area;
48 * our caller should allocate that area, not our caller's caller.
49 * But then, they did not let me invent the calling sequence....
51 * We assume the caller has executed a `save' instruction.
53 #define REGOFF (BIAS - CC64FSZ)
55 ENTRY(__builtin_saveregs)
56 stx %i0, [%fp + REGOFF + 0x00] ! fr->fr_argd[0]
57 stx %i1, [%fp + REGOFF + 0x08] ! fr->fr_argd[1]
58 stx %i2, [%fp + REGOFF + 0x10] ! fr->fr_argd[2]
59 stx %i3, [%fp + REGOFF + 0x18] ! fr->fr_argd[3]
60 stx %i4, [%fp + REGOFF + 0x20] ! fr->fr_argd[4]
62 stx %i5, [%fp + REGOFF + 0x28] ! fr->fr_argd[5]