/*      $NetBSD: linux_machdep.h,v 1.12 2011/11/21 22:00:42 njoly Exp $ */

/*-
 * Copyright (c) 1998, 2000 The NetBSD Foundation, Inc.
 * All rights reserved.
 *
 * This code is derived from software contributed to The NetBSD Foundation
 * by Eric Haszlakiewicz.
 *
 * 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.
 */

#ifndef _ALPHA_LINUX_MACHDEP_H
#define _ALPHA_LINUX_MACHDEP_H

#include <compat/linux/common/linux_types.h>
#include <compat/linux/common/linux_signal.h>
#include <compat/linux/common/linux_siginfo.h>

/*
 * The Linux sigcontext, pretty much a standard alpha trapframe.
 */
struct linux_sigcontext {
        long            sc_onstack;
        long            sc_mask;
        long            sc_pc;
        long            sc_ps;
        long            sc_regs[32];
        long            sc_ownedfp;
        long            sc_fpregs[32];
        unsigned long   sc_fpcr;
        unsigned long   sc_fp_control;
        unsigned long   sc_reserved1, sc_reserved2;
        unsigned long   sc_ssize;
        char *          sc_sbase;
        unsigned long   sc_traparg_a0;
        unsigned long   sc_traparg_a1;
        unsigned long   sc_traparg_a2;
        unsigned long   sc_fp_trap_pc;
        unsigned long   sc_fp_trigger_sum;
        unsigned long   sc_fp_trigger_inst;
};

struct linux_ucontext {
        u_long                  uc_flags;
        struct linux_ucontext   *uc_link;
        linux_old_sigset_t      uc_osf_sigmask;
        linux_stack_t           uc_stack;
        struct linux_sigcontext uc_mcontext;
        linux_sigset_t          uc_sigmask;
};

/*
 * We make the stack look like Linux expects it when calling a signal
 * handler, but use the BSD way of calling the handler and sigreturn().
 */

#define LINUX_INSN_MOV_R30_R16  0x47fe0410
#define LINUX_INSN_LDI_R0       0x201f0000
#define LINUX_INSN_CALLSYS      0x00000083

struct linux_sigframe {
        struct          linux_sigcontext sf_sc;
        unsigned long   extramask[LINUX__NSIG_WORDS-1];
        unsigned int    retcode[3];
};

struct linux_rt_sigframe {
        struct linux_siginfo    info;
        struct linux_ucontext   uc;
        unsigned int            retcode[3];
};

#ifdef _KERNEL
__BEGIN_DECLS
void setup_linux_rt_sigframe(struct trapframe *, const ksiginfo_t *,
    const sigset_t *);
void setup_linux_sigframe(struct trapframe *, const ksiginfo_t *,
    const sigset_t *);
int linux_restore_sigcontext(struct lwp *, struct linux_sigcontext,
    sigset_t *);
void linux_syscall_intern(struct proc *);
__END_DECLS
#endif /* !_KERNEL */

#endif /* _ALPHA_LINUX_MACHDEP_H */