minix/lib/libc/arch/sparc64/gen/setjmp.S

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/* $NetBSD: setjmp.S,v 1.7 2005/10/16 17:15:38 christos Exp $ */
/*
* Copyright (c) 1992, 1993
* The Regents of the University of California. All rights reserved.
*
* This software was developed by the Computer Systems Engineering group
* at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
* contributed to Berkeley.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* from: Header: setjmp.s,v 1.2 92/06/25 03:18:43 torek Exp
*/
#define _LOCORE
#include <machine/asm.h>
#include <machine/frame.h>
#if defined(LIBC_SCCS) && !defined(lint)
#if 0
.asciz "@(#)setjmp.s 8.1 (Berkeley) 6/4/93"
#else
RCSID("$NetBSD: setjmp.S,v 1.7 2005/10/16 17:15:38 christos Exp $")
#endif
#endif /* LIBC_SCCS and not lint */
/*
* C library -- setjmp
*
* __longjmp14(a,v)
* will generate a "return(v)" from
* the last call to
* setjmp(a)
* by restoring registers from the stack,
* and a struct sigcontext, see <signal.h>
*/
#include "SYS.h"
.register %g2,#ignore
.register %g3,#ignore
.register %g6,#ignore
ENTRY(__setjmp14)
save %sp, -CC64FSZ, %sp
/* save globals into locals */
mov %g1, %l1
mov %g2, %l2
mov %g3, %l3
mov %g4, %l4
mov %g5, %l5
mov %g6, %l6
mov %g7, %l7
#ifdef PIC
PIC_PROLOGUE(%i1, %o4)
#endif
/* now get sigmask and onstack flag */
add %i0, 0x38, %o2 /* build sigcontext in [%o2]->sc.sc_mask */
mov 1, %o0 /* SIG_BLOCK */
/* sigprocmask(SIG_BLOCK, (sigset_t *)NULL, (sigset_t *)a) */
#ifdef PIC
#ifdef BIGPIC
set _C_LABEL(__sigprocmask14), %o4
ldx [%i1 + %o4], %g2
#else
ldx [%i1 + _C_LABEL(__sigprocmask14)], %g2
#endif
call %g2
#else
call _C_LABEL(__sigprocmask14)
#endif
clr %o1
clr %o0 /* sigstack(NULL, &foo) */
#ifdef PIC
#ifdef BIGPIC
set _C_LABEL(__sigaltstack14), %o4
ldx [%i1 + %o4], %g2
#else
ldx [%i1 + _C_LABEL(__sigaltstack14)], %g2
#endif
call %g2
#else
call _C_LABEL(__sigaltstack14)
#endif
add %i0, 8, %o1 /* (foo being part of the sigcontext we're overwriting) */
lduw [%i0 + 8 + 0x10], %o0 /* foo.ss_flags */
and %o0, 1, %o1 /* onstack = foo.ss_flags & SS_ONSTACK; */
st %o1, [%i0 + 0x00] /* sc.sc_onstack = current onstack; */
/* store essential state */
stx %fp, [%i0 + 0x08] /* sc.sc_sp = sp */
add %i7, 8, %o0
stx %o0, [%i0 + 0x10] /* sc.sc_pc = return_pc */
add %i7, 12, %o0
stx %o0, [%i0 + 0x18] /* sc.sc_npc = return_pc + 4 */
stx %g0, [%i0 + 0x20] /* sc.sc_tstate = (clean ccr) */
stx %l1, [%i0 + 0x28] /* sc.sc_g1 */
stx %l2, [%i0 + 0x30] /* sc.sc_o0, set in longjmp, use as %g2 */
/* 0x38 */ /* sc.sc_mask was already saved above */
/* save additional registers needed to fill a complete mcontext */
stx %l3, [%i0 + 0x40]
stx %l4, [%i0 + 0x48]
stx %l5, [%i0 + 0x50]
stx %l6, [%i0 + 0x58]
stx %l7, [%i0 + 0x60]
ret /* return 0 */
restore %g0, 0, %o0