Use setcontext() instead of sigreturn() to implement longjmp().
This commit is contained in:
simonb
parent
339695cff5
commit
769814bf89
|
|
@ -0,0 +1,105 @@
|
|||
/* $NetBSD: __longjmp14.c,v 1.1 2004/03/23 02:21:49 simonb 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.
|
||||
* 3. All advertising materials mentioning features or use of this software
|
||||
* must display the following acknowledgement:
|
||||
* This product includes software developed by the NetBSD
|
||||
* Foundation, Inc. and its contributors.
|
||||
* 4. Neither the name of The NetBSD Foundation 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 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>
|
||||
|
||||
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] != 0xACEDBADE)
|
||||
goto err;
|
||||
|
||||
/* Ensure non-zero return value */
|
||||
if (val == 0)
|
||||
val = 1;
|
||||
|
||||
/* Set _UC_SIGMASK and _UC_CPU */
|
||||
uc.uc_flags = _UC_SIGMASK | _UC_CPU;
|
||||
|
||||
/* Clear uc_link */
|
||||
uc.uc_link = 0;
|
||||
|
||||
/* Save return value in context */
|
||||
uc.uc_mcontext.__gregs[_R_V0] = val;
|
||||
|
||||
/* Copy saved registers */
|
||||
uc.uc_mcontext.__gregs[_R_S0] = sc->sc_regs[_R_S0];
|
||||
uc.uc_mcontext.__gregs[_R_S1] = sc->sc_regs[_R_S1];
|
||||
uc.uc_mcontext.__gregs[_R_S2] = sc->sc_regs[_R_S2];
|
||||
uc.uc_mcontext.__gregs[_R_S3] = sc->sc_regs[_R_S3];
|
||||
uc.uc_mcontext.__gregs[_R_S4] = sc->sc_regs[_R_S4];
|
||||
uc.uc_mcontext.__gregs[_R_S5] = sc->sc_regs[_R_S5];
|
||||
uc.uc_mcontext.__gregs[_R_S6] = sc->sc_regs[_R_S6];
|
||||
uc.uc_mcontext.__gregs[_R_S7] = sc->sc_regs[_R_S7];
|
||||
uc.uc_mcontext.__gregs[_R_S8] = sc->sc_regs[_R_S8];
|
||||
uc.uc_mcontext.__gregs[_R_SP] = sc->sc_regs[_R_SP];
|
||||
uc.uc_mcontext.__gregs[_R_RA] = sc->sc_regs[_R_RA];
|
||||
|
||||
/* Copy FP state */
|
||||
if (sc->sc_fpused) {
|
||||
/* FP saved regs are $f20 .. $f31 */
|
||||
memcpy(&uc.uc_mcontext.__fpregs.__fp_r.
|
||||
__fp_regs32.__fp32_regs[20], &sc->sc_fpregs[20], 32 - 20);
|
||||
uc.uc_mcontext.__fpregs.__fp_csr = sc->sc_regs[_R_FSR];
|
||||
/* XXX sc_fp_control */
|
||||
uc.uc_flags |= _UC_FPU;
|
||||
}
|
||||
|
||||
/* Copy signal mask */
|
||||
uc.uc_sigmask = sc->sc_mask;
|
||||
|
||||
setcontext(&uc);
|
||||
err:
|
||||
longjmperror();
|
||||
abort();
|
||||
/* NOTREACHED */
|
||||
}
|
||||
|
|
@ -1,4 +1,4 @@
|
|||
/* $NetBSD: __setjmp14.S,v 1.9 2003/11/26 08:36:49 he Exp $ */
|
||||
/* $NetBSD: __setjmp14.S,v 1.10 2004/03/23 02:21:49 simonb Exp $ */
|
||||
|
||||
/*-
|
||||
* Copyright (c) 1991, 1993
|
||||
|
|
@ -41,7 +41,7 @@
|
|||
|
||||
#if defined(LIBC_SCCS) && !defined(lint)
|
||||
ASMSTR("from: @(#)setjmp.s 8.1 (Berkeley) 6/4/93")
|
||||
ASMSTR("$NetBSD: __setjmp14.S,v 1.9 2003/11/26 08:36:49 he Exp $")
|
||||
ASMSTR("$NetBSD: __setjmp14.S,v 1.10 2004/03/23 02:21:49 simonb Exp $")
|
||||
#endif /* LIBC_SCCS and not lint */
|
||||
|
||||
#ifdef __ABICALLS__
|
||||
|
|
@ -130,23 +130,6 @@ NON_LEAF(__setjmp14, SETJMP_FRAME_SIZE, ra)
|
|||
move v0, zero
|
||||
j ra
|
||||
REG_EPILOGUE
|
||||
END(__setjmp14)
|
||||
|
||||
LEAF(__longjmp14)
|
||||
#ifdef __ABICALLS__
|
||||
.set noreorder
|
||||
.cpload t9
|
||||
.set reorder
|
||||
subu sp, sp, 32
|
||||
.cprestore 16
|
||||
#endif
|
||||
REG_PROLOGUE
|
||||
/* save return value in sc_regs[_R_V0] */
|
||||
REG_S a1,(_OFFSETOF_SC_REGS + _R_V0 * SZREG)(a0)
|
||||
REG_EPILOGUE
|
||||
li v0, SYS___sigreturn14
|
||||
syscall
|
||||
botch:
|
||||
jal _C_LABEL(longjmperror)
|
||||
jal _C_LABEL(abort)
|
||||
END(__longjmp14)
|
||||
END(__setjmp14)
|
||||
|
|
|
|||
Loading…
Reference in New Issue