linux-user: Add HPPA target_signal.h and target_cpu.h

/*

 * HPPA specific CPU ABI and functions for linux-user

 *

 *  Copyright (c) 2016  Richard Henderson

 *

 * This library is free software; you can redistribute it and/or

 * modify it under the terms of the GNU Lesser General Public

 * License as published by the Free Software Foundation; either

 * version 2 of the License, or (at your option) any later version.

 *

 * This library is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

 * Lesser General Public License for more details.

 *

 * You should have received a copy of the GNU Lesser General Public

 * License along with this library; if not, see <http://www.gnu.org/licenses/>.

 */

#ifndef ALPHA_TARGET_CPU_H

#define ALPHA_TARGET_CPU_H

static inline void cpu_clone_regs(CPUHPPAState *env, target_ulong newsp)

{

    if (newsp) {

        env->gr[30] = newsp;

    }

    env->gr[28] = 0;

}

static inline void cpu_set_tls(CPUHPPAState *env, target_ulong newtls)

{

    env->cr27 = newtls;

}

#endif

#ifndef HPPA_TARGET_SIGNAL_H

#define HPPA_TARGET_SIGNAL_H

#include "cpu.h"

/* this struct defines a stack used during syscall handling */

typedef struct target_sigaltstack {

    abi_ulong ss_sp;

    int32_t ss_flags;

    abi_ulong ss_size;

} target_stack_t;

/*

 * sigaltstack controls

 */

#define TARGET_SS_ONSTACK	1

#define TARGET_SS_DISABLE	2

#define TARGET_MINSIGSTKSZ	2048

#define TARGET_SIGSTKSZ		8192

static inline abi_ulong get_sp_from_cpustate(CPUHPPAState *state)

{

    return state->gr[30];

}

#endif /* HPPA_TARGET_SIGNAL_H */