/*      $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 */