e506034ec1
instead of unwinding the call stack. This makes them usable to switch stacks, e.g. for libc_r. Do not save the frame pointer in setjmp() and _setjmp(), it is not needed any more. Rename _longjmp() to ___longjmp(), with a weak alias to _longjmp(), like the other architectures did.
93 lines
3.0 KiB
ArmAsm
93 lines
3.0 KiB
ArmAsm
/*
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* Copyright (c) 1992, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This software was developed by the Computer Systems Engineering group
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* at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
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* contributed to Berkeley.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* from: Header: _setjmp.s,v 1.1 91/07/06 16:45:53 torek Exp
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*/
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#if defined(LIBC_SCCS) && !defined(lint)
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.asciz "@(#)_setjmp.s 8.1 (Berkeley) 6/4/93"
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#if 0
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RCSID("$NetBSD: _setjmp.S,v 1.4 1998/10/08 02:27:59 eeh Exp $")
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#endif
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#endif /* LIBC_SCCS and not lint */
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#include <machine/asm.h>
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__FBSDID("$FreeBSD$");
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#include "assym.s"
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.register %g2,#ignore
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.register %g3,#ignore
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/*
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* C library -- setjmp, longjmp
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*
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* longjmp(a,v)
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* will generate a "return(v?v:1)" from
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* the last call to
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* setjmp(a)
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* by restoring the previous context.
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*/
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ENTRY(setjmp)
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save %sp, -CCFSZ, %sp
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mov SIG_BLOCK, %o0
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clr %o1
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call CNAME(sigprocmask)
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add %i0, _JB_SIGMASK, %o2
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restore
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stx %sp, [%o0 + _JB_SP]
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stx %o7, [%o0 + _JB_PC]
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retl
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clr %o0
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END(setjmp)
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.weak CNAME(longjmp)
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.set CNAME(longjmp),CNAME(__longjmp)
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ENTRY(__longjmp)
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save %sp, -CCFSZ, %sp
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flushw
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mov SIG_SETMASK, %o0
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add %i0, _JB_SIGMASK, %o1
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call CNAME(sigprocmask)
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clr %o2
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ldx [%i0 + _JB_SP], %fp
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ldx [%i0 + _JB_PC], %i7
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mov 1, %i0
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movrnz %i1, %i1, %i0
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ret
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restore
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END(__longjmp)
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