minix/lib/libc/arch/sparc/gen/longjmp.c
Lionel Sambuc e415d48872 Libc update to simplify merge.
Bumping libc files for unsupported architectures, to simplify merging.
A bunch of small fixes:
 * in libutil update
 * the macro in endian.h
 * some undefined types due to clear separation from host.
 * Fix a warning for cdbr.c

Some modification which were required for the new build system:
 * inclusion path for const.h in sconst, still hacky
 * Removed default malloc.c which conflicts on some occasions.
2012-11-15 16:07:29 +01:00

107 lines
3.5 KiB
C

/* $NetBSD: longjmp.c,v 1.3 2011/04/30 23:41:12 martin 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.
*
* 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 <stddef.h>
#define __LIBC12_SOURCE__
#include <setjmp.h>
#include <compat/include/setjmp.h>
struct __jmp_buf_regs_t {
__greg_t g4;
__greg_t g7;
__greg_t save_mask;
};
/*
* setjmp.S uses hard coded offsets into the jump_buf,
* make sure any changes cause a compile failure here
*/
__CTASSERT(56 == offsetof(struct __jmp_buf_regs_t,save_mask) +
sizeof(struct sigcontext));
__CTASSERT(sizeof(sigjmp_buf) >= sizeof(struct __jmp_buf_regs_t) +
sizeof(struct sigcontext));
/*
* Use setcontext to reload the stack pointer, program counter <pc,npc>, and
* set the return value in %o0. The %i and %l registers will be reloaded
* from the place to which %sp points.
*/
void
__longjmp14(jmp_buf env, int val)
{
struct sigcontext *sc = (void *)env;
struct __jmp_buf_regs_t *r = (void*)&sc[1];
ucontext_t uc;
/* Ensure non-zero SP */
if (sc->sc_sp == 0)
goto err;
/* Initialise the context */
memset(&uc, 0, sizeof(uc));
/*
* 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);
/* Extract PSR, PC, NPC and SP from jmp_buf */
uc.uc_mcontext.__gregs[_REG_PSR] = sc->sc_psr;
uc.uc_mcontext.__gregs[_REG_PC] = sc->sc_pc;
uc.uc_mcontext.__gregs[_REG_nPC] = sc->sc_pc+4;
uc.uc_mcontext.__gregs[_REG_O6] = sc->sc_sp;
uc.uc_mcontext.__gregs[_REG_G2] = sc->sc_g1;
uc.uc_mcontext.__gregs[_REG_G3] = sc->sc_npc;
uc.uc_mcontext.__gregs[_REG_G4] = r->g4;
uc.uc_mcontext.__gregs[_REG_G7] = r->g7;
/* Set the return value; make sure it's non-zero */
uc.uc_mcontext.__gregs[_REG_O0] = (val != 0 ? val : 1);
setcontext(&uc);
err:
longjmperror();
abort();
/* NOTREACHED */
}