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jeremybenn |
/*
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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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* Modified for incorporation into newlib by Joel Sherrill
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* (joel@OARcorp.com), On-Line Applications Research, 1995.
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* Did the following:
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* + merged in DEFS.h
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* + removed error check since it prevented using this setjmp
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* to "context switch"
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* + added the support for the "user label" and "register" prefix
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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: /cvs/cvsfiles/devo/newlib/libc/machine/sparc/setjmp.S,v 1.1 1997/06/25 07:19:16 marka 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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#endif /* LIBC_SCCS and not lint */
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/*
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* Recent versions of GNU cpp define variables which indicate the
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* need for underscores and percents. If not using GNU cpp or
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* the version does not support this, then you will obviously
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* have to define these as appropriate.
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*/
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#ifndef __USER_LABEL_PREFIX__
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#define __USER_LABEL_PREFIX__ _
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#endif
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#ifndef __REGISTER_PREFIX__
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#define __REGISTER_PREFIX__
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#endif
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/* ANSI concatenation macros. */
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#define CONCAT1(a, b) CONCAT2(a, b)
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#define CONCAT2(a, b) a ## b
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/* Use the right prefix for global labels. */
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#define SYM(x) CONCAT1 (__USER_LABEL_PREFIX__, x)
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/*********************************************************************
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*********************************************************************
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* Contents of DEFS.h *
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*********************************************************************
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*********************************************************************/
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#ifdef PROF
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#define ENTRY(x) \
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.align 4; .globl SYM(x); .proc 1; SYM(x):; .data; .align 4; 1: .long 0; \
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.text; save %sp,-96,%sp; sethi %hi(1b),%o0; call mcount; \
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or %lo(1b),%o0,%o0; restore
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#else
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#define ENTRY(x) \
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.align 4; .globl SYM(x); .proc 1; SYM(x):
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#endif
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/*********************************************************************
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*********************************************************************
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* END of DEFS.h *
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*********************************************************************
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*********************************************************************/
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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 unwinding the call stack.
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* The previous signal state is NOT restored.
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*/
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/* #include "DEFS.h" */
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ENTRY(setjmp)
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ENTRY(_setjmp)
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st %sp, [%o0] /* caller's stack pointer */
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st %i7, [%o0+4] /* caller's return pc */
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st %fp, [%o0+8] /* store caller's frame pointer */
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st %o7, [%o0+12]
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retl
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clr %o0 ! return 0
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ENTRY(longjmp)
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ENTRY(_longjmp)
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ta 0x03 /* flush registers */
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addcc %o1, %g0, %g6 ! compute v ? v : 1 in a global register
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be,a 0f
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mov 1, %g6
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0:
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ld [%o0], %sp /* caller's stack pointer */
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ldd [%sp], %l0
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ldd [%sp+8], %l2
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ldd [%sp+16], %l4
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ldd [%sp+24], %l6
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ldd [%sp+32], %i0
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ldd [%sp+40], %i2
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ldd [%sp+48], %i4
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ld [%o0+4], %i7 /* caller's return pc */
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ld [%o0+8], %fp /* caller's frame pointer */
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ld [%o0+12], %o7
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jmp %o7 + 8 ! success, return %g6
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mov %g6, %o0
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