b6cbf7203b
This patch imports the unmodified current version of NetBSD libc. The NetBSD includes are in /nbsd_include, while the libc code itself is split between lib/nbsd_libc and common/lib/libc.
86 lines
2.9 KiB
C
86 lines
2.9 KiB
C
/* $NetBSD: longjmp.c,v 1.2 2008/04/28 20:22:57 martin Exp $ */
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/*-
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* Copyright (c) 2003 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Christian Limpach.
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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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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "namespace.h"
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#include <sys/types.h>
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#include <ucontext.h>
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#include <signal.h>
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#include <stdlib.h>
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#include <string.h>
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#define __LIBC12_SOURCE__
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#include <setjmp.h>
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#include <compat/include/setjmp.h>
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/*
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* Use setcontext to reload the stack pointer, program counter <pc,npc>, and
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* set the return value in %o0. The %i and %l registers will be reloaded
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* from the place to which %sp points.
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*/
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void
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__longjmp14(jmp_buf env, int val)
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{
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struct sigcontext *sc = (void *)env;
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ucontext_t uc;
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/* Ensure non-zero SP */
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if (sc->sc_sp == 0)
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goto err;
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/* Initialise the fields we're going to use */
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uc.uc_link = 0;
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/*
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* Set _UC_{SET,CLR}STACK according to SS_ONSTACK.
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*
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* Restore the signal mask with sigprocmask() instead of _UC_SIGMASK,
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* since libpthread may want to interpose on signal handling.
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*/
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uc.uc_flags = _UC_CPU | (sc->sc_onstack ? _UC_SETSTACK : _UC_CLRSTACK);
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sigprocmask(SIG_SETMASK, &sc->sc_mask, NULL);
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/* Extract PSR, PC, NPC and SP from jmp_buf */
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uc.uc_mcontext.__gregs[_REG_PSR] = sc->sc_psr;
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uc.uc_mcontext.__gregs[_REG_PC] = sc->sc_pc;
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uc.uc_mcontext.__gregs[_REG_nPC] = sc->sc_npc;
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uc.uc_mcontext.__gregs[_REG_O6] = sc->sc_sp;
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/* Set the return value; make sure it's non-zero */
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uc.uc_mcontext.__gregs[_REG_O0] = (val != 0 ? val : 1);
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setcontext(&uc);
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err:
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longjmperror();
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abort();
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/* NOTREACHED */
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}
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