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      1 /*	$NetBSD: linux_machdep.h,v 1.12 2011/11/21 22:00:42 njoly Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 1998, 2000 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Eric Haszlakiewicz.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29  * POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 
     32 #ifndef _ALPHA_LINUX_MACHDEP_H
     33 #define _ALPHA_LINUX_MACHDEP_H
     34 
     35 #include <compat/linux/common/linux_types.h>
     36 #include <compat/linux/common/linux_signal.h>
     37 #include <compat/linux/common/linux_siginfo.h>
     38 
     39 /*
     40  * The Linux sigcontext, pretty much a standard alpha trapframe.
     41  */
     42 struct linux_sigcontext {
     43 	long		sc_onstack;
     44 	long		sc_mask;
     45 	long		sc_pc;
     46 	long		sc_ps;
     47 	long		sc_regs[32];
     48 	long		sc_ownedfp;
     49 	long		sc_fpregs[32];
     50 	unsigned long	sc_fpcr;
     51 	unsigned long	sc_fp_control;
     52 	unsigned long	sc_reserved1, sc_reserved2;
     53 	unsigned long	sc_ssize;
     54 	char *		sc_sbase;
     55 	unsigned long	sc_traparg_a0;
     56 	unsigned long	sc_traparg_a1;
     57 	unsigned long	sc_traparg_a2;
     58 	unsigned long	sc_fp_trap_pc;
     59 	unsigned long	sc_fp_trigger_sum;
     60 	unsigned long	sc_fp_trigger_inst;
     61 };
     62 
     63 struct linux_ucontext {
     64 	u_long			uc_flags;
     65 	struct linux_ucontext	*uc_link;
     66 	linux_old_sigset_t	uc_osf_sigmask;
     67 	linux_stack_t		uc_stack;
     68 	struct linux_sigcontext	uc_mcontext;
     69 	linux_sigset_t		uc_sigmask;
     70 };
     71 
     72 /*
     73  * We make the stack look like Linux expects it when calling a signal
     74  * handler, but use the BSD way of calling the handler and sigreturn().
     75  */
     76 
     77 #define LINUX_INSN_MOV_R30_R16	0x47fe0410
     78 #define LINUX_INSN_LDI_R0	0x201f0000
     79 #define LINUX_INSN_CALLSYS	0x00000083
     80 
     81 struct linux_sigframe {
     82 	struct		linux_sigcontext sf_sc;
     83 	unsigned long	extramask[LINUX__NSIG_WORDS-1];
     84 	unsigned int	retcode[3];
     85 };
     86 
     87 struct linux_rt_sigframe {
     88 	struct linux_siginfo	info;
     89 	struct linux_ucontext	uc;
     90 	unsigned int		retcode[3];
     91 };
     92 
     93 #ifdef _KERNEL
     94 __BEGIN_DECLS
     95 void setup_linux_rt_sigframe(struct trapframe *, const ksiginfo_t *,
     96     const sigset_t *);
     97 void setup_linux_sigframe(struct trapframe *, const ksiginfo_t *,
     98     const sigset_t *);
     99 int linux_restore_sigcontext(struct lwp *, struct linux_sigcontext,
    100     sigset_t *);
    101 void linux_syscall_intern(struct proc *);
    102 __END_DECLS
    103 #endif /* !_KERNEL */
    104 
    105 #endif /* _ALPHA_LINUX_MACHDEP_H */
    106