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.
109 lines
3.6 KiB
C
109 lines
3.6 KiB
C
/* $NetBSD: longjmp.c,v 1.4 2010/09/03 17:22:51 matt Exp $ */
|
|
|
|
/*-
|
|
* Copyright (c) 2003 The NetBSD Foundation, Inc.
|
|
* All rights reserved.
|
|
*
|
|
* This code is derived from software contributed to The NetBSD Foundation
|
|
* by Christian Limpach and Matt Thomas.
|
|
*
|
|
* 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.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
|
|
*/
|
|
|
|
#include "namespace.h"
|
|
#include <sys/types.h>
|
|
#include <ucontext.h>
|
|
#include <signal.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
|
|
#include <machine/regnum.h>
|
|
|
|
#define __LIBC12_SOURCE__
|
|
#include <setjmp.h>
|
|
#include <compat/include/setjmp.h>
|
|
|
|
void
|
|
__longjmp14(jmp_buf env, int val)
|
|
{
|
|
struct sigcontext *sc = (void *)env;
|
|
ucontext_t uc;
|
|
|
|
/* Ensure non-zero SP and sigcontext magic number is present */
|
|
if (sc->sc_regs[_R_SP] == 0 || sc->sc_regs[_R_ZERO] != (mips_reg_t)0xACEDBADE)
|
|
goto err;
|
|
|
|
/* Ensure non-zero return value */
|
|
if (val == 0)
|
|
val = 1;
|
|
|
|
/*
|
|
* Set _UC_{SET,CLR}STACK according to SS_ONSTACK.
|
|
*
|
|
* Restore the signal mask with sigprocmask() instead of _UC_SIGMASK,
|
|
* since libpthread may want to interpose on signal handling.
|
|
*/
|
|
uc.uc_flags = _UC_CPU | (sc->sc_onstack ? _UC_SETSTACK : _UC_CLRSTACK);
|
|
|
|
sigprocmask(SIG_SETMASK, &sc->sc_mask, NULL);
|
|
|
|
/* Clear uc_link */
|
|
uc.uc_link = 0;
|
|
|
|
/* Save return value in context */
|
|
uc.uc_mcontext.__gregs[_REG_V0] = val;
|
|
|
|
/* Copy saved registers */
|
|
uc.uc_mcontext.__gregs[_REG_S0] = sc->sc_regs[_R_S0];
|
|
uc.uc_mcontext.__gregs[_REG_S1] = sc->sc_regs[_R_S1];
|
|
uc.uc_mcontext.__gregs[_REG_S2] = sc->sc_regs[_R_S2];
|
|
uc.uc_mcontext.__gregs[_REG_S3] = sc->sc_regs[_R_S3];
|
|
uc.uc_mcontext.__gregs[_REG_S4] = sc->sc_regs[_R_S4];
|
|
uc.uc_mcontext.__gregs[_REG_S5] = sc->sc_regs[_R_S5];
|
|
uc.uc_mcontext.__gregs[_REG_S6] = sc->sc_regs[_R_S6];
|
|
uc.uc_mcontext.__gregs[_REG_S7] = sc->sc_regs[_R_S7];
|
|
uc.uc_mcontext.__gregs[_REG_S8] = sc->sc_regs[_R_S8];
|
|
#if defined(__mips_n32) || defined(__mips_n64)
|
|
uc.uc_mcontext.__gregs[_REG_GP] = sc->sc_regs[_R_GP];
|
|
#endif
|
|
uc.uc_mcontext.__gregs[_REG_SP] = sc->sc_regs[_R_SP];
|
|
uc.uc_mcontext.__gregs[_REG_RA] = sc->sc_regs[_R_RA];
|
|
uc.uc_mcontext.__gregs[_REG_EPC] = sc->sc_pc;
|
|
|
|
/* Copy FP state */
|
|
if (sc->sc_fpused) {
|
|
/* FP saved regs are $f20 .. $f31 */
|
|
memcpy(&uc.uc_mcontext.__fpregs.__fp_r.__fp_regs[20],
|
|
&sc->sc_fpregs[20], 32 - 20);
|
|
uc.uc_mcontext.__fpregs.__fp_csr =
|
|
sc->sc_fpregs[_R_FSR - _FPBASE];
|
|
/* XXX sc_fp_control */
|
|
uc.uc_flags |= _UC_FPU;
|
|
}
|
|
|
|
setcontext(&uc);
|
|
err:
|
|
longjmperror();
|
|
abort();
|
|
/* NOTREACHED */
|
|
}
|