[qemu.git] / linux-user / m68k / signal.c

/*
 *  Emulation of Linux signals
 *
 *  Copyright (c) 2003 Fabrice Bellard
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program 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 General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, see <http://www.gnu.org/licenses/>.
 */
#include "qemu/osdep.h"
#include "qemu.h"
#include "signal-common.h"
#include "linux-user/trace.h"

struct target_sigcontext {
    abi_ulong  sc_mask;
    abi_ulong  sc_usp;
    abi_ulong  sc_d0;
    abi_ulong  sc_d1;
    abi_ulong  sc_a0;
    abi_ulong  sc_a1;
    unsigned short sc_sr;
    abi_ulong  sc_pc;
};

struct target_sigframe
{
    abi_ulong pretcode;
    int sig;
    int code;
    abi_ulong psc;
    char retcode[8];
    abi_ulong extramask[TARGET_NSIG_WORDS-1];
    struct target_sigcontext sc;
};

typedef int target_greg_t;
#define TARGET_NGREG 18
typedef target_greg_t target_gregset_t[TARGET_NGREG];

typedef struct target_fpregset {
    int f_fpcntl[3];
    int f_fpregs[8*3];
} target_fpregset_t;

struct target_mcontext {
    int version;
    target_gregset_t gregs;
    target_fpregset_t fpregs;
};

#define TARGET_MCONTEXT_VERSION 2

struct target_ucontext {
    abi_ulong tuc_flags;
    abi_ulong tuc_link;
    target_stack_t tuc_stack;
    struct target_mcontext tuc_mcontext;
    abi_long tuc_filler[80];
    target_sigset_t tuc_sigmask;
};

struct target_rt_sigframe
{
    abi_ulong pretcode;
    int sig;
    abi_ulong pinfo;
    abi_ulong puc;
    char retcode[8];
    struct target_siginfo info;
    struct target_ucontext uc;
};

static void setup_sigcontext(struct target_sigcontext *sc, CPUM68KState *env,
                             abi_ulong mask)
{
    uint32_t sr = (env->sr & 0xff00) | cpu_m68k_get_ccr(env);
    __put_user(mask, &sc->sc_mask);
    __put_user(env->aregs[7], &sc->sc_usp);
    __put_user(env->dregs[0], &sc->sc_d0);
    __put_user(env->dregs[1], &sc->sc_d1);
    __put_user(env->aregs[0], &sc->sc_a0);
    __put_user(env->aregs[1], &sc->sc_a1);
    __put_user(sr, &sc->sc_sr);
    __put_user(env->pc, &sc->sc_pc);
}

static void
restore_sigcontext(CPUM68KState *env, struct target_sigcontext *sc)
{
    int temp;

    __get_user(env->aregs[7], &sc->sc_usp);
    __get_user(env->dregs[0], &sc->sc_d0);
    __get_user(env->dregs[1], &sc->sc_d1);
    __get_user(env->aregs[0], &sc->sc_a0);
    __get_user(env->aregs[1], &sc->sc_a1);
    __get_user(env->pc, &sc->sc_pc);
    __get_user(temp, &sc->sc_sr);
    cpu_m68k_set_ccr(env, temp);
}

/*
 * Determine which stack to use..
 */
static inline abi_ulong
get_sigframe(struct target_sigaction *ka, CPUM68KState *regs,
             size_t frame_size)
{
    abi_ulong sp;

    sp = target_sigsp(get_sp_from_cpustate(regs), ka);


    return ((sp - frame_size) & -8UL);
}

void setup_frame(int sig, struct target_sigaction *ka,
                 target_sigset_t *set, CPUM68KState *env)
{
    struct target_sigframe *frame;
    abi_ulong frame_addr;
    abi_ulong retcode_addr;
    abi_ulong sc_addr;
    int i;

    frame_addr = get_sigframe(ka, env, sizeof *frame);
    trace_user_setup_frame(env, frame_addr);
    if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) {
        goto give_sigsegv;
    }

    __put_user(sig, &frame->sig);

    sc_addr = frame_addr + offsetof(struct target_sigframe, sc);
    __put_user(sc_addr, &frame->psc);

    setup_sigcontext(&frame->sc, env, set->sig[0]);

    for(i = 1; i < TARGET_NSIG_WORDS; i++) {
        __put_user(set->sig[i], &frame->extramask[i - 1]);
    }

    /* Set up to return from userspace.  */

    retcode_addr = frame_addr + offsetof(struct target_sigframe, retcode);
    __put_user(retcode_addr, &frame->pretcode);

    /* moveq #,d0; trap #0 */

    __put_user(0x70004e40 + (TARGET_NR_sigreturn << 16),
               (uint32_t *)(frame->retcode));

    /* Set up to return from userspace */

    env->aregs[7] = frame_addr;
    env->pc = ka->_sa_handler;

    unlock_user_struct(frame, frame_addr, 1);
    return;

give_sigsegv:
    force_sigsegv(sig);
}

static inline void target_rt_save_fpu_state(struct target_ucontext *uc,
                                           CPUM68KState *env)
{
    int i;
    target_fpregset_t *fpregs = &uc->tuc_mcontext.fpregs;

    __put_user(env->fpcr, &fpregs->f_fpcntl[0]);
    __put_user(env->fpsr, &fpregs->f_fpcntl[1]);
    /* fpiar is not emulated */

    for (i = 0; i < 8; i++) {
        uint32_t high = env->fregs[i].d.high << 16;
        __put_user(high, &fpregs->f_fpregs[i * 3]);
        __put_user(env->fregs[i].d.low,
                   (uint64_t *)&fpregs->f_fpregs[i * 3 + 1]);
    }
}

static inline int target_rt_setup_ucontext(struct target_ucontext *uc,
                                           CPUM68KState *env)
{
    target_greg_t *gregs = uc->tuc_mcontext.gregs;
    uint32_t sr = (env->sr & 0xff00) | cpu_m68k_get_ccr(env);

    __put_user(TARGET_MCONTEXT_VERSION, &uc->tuc_mcontext.version);
    __put_user(env->dregs[0], &gregs[0]);
    __put_user(env->dregs[1], &gregs[1]);
    __put_user(env->dregs[2], &gregs[2]);
    __put_user(env->dregs[3], &gregs[3]);
    __put_user(env->dregs[4], &gregs[4]);
    __put_user(env->dregs[5], &gregs[5]);
    __put_user(env->dregs[6], &gregs[6]);
    __put_user(env->dregs[7], &gregs[7]);
    __put_user(env->aregs[0], &gregs[8]);
    __put_user(env->aregs[1], &gregs[9]);
    __put_user(env->aregs[2], &gregs[10]);
    __put_user(env->aregs[3], &gregs[11]);
    __put_user(env->aregs[4], &gregs[12]);
    __put_user(env->aregs[5], &gregs[13]);
    __put_user(env->aregs[6], &gregs[14]);
    __put_user(env->aregs[7], &gregs[15]);
    __put_user(env->pc, &gregs[16]);
    __put_user(sr, &gregs[17]);

    target_rt_save_fpu_state(uc, env);

    return 0;
}

static inline void target_rt_restore_fpu_state(CPUM68KState *env,
                                               struct target_ucontext *uc)
{
    int i;
    target_fpregset_t *fpregs = &uc->tuc_mcontext.fpregs;
    uint32_t fpcr;

    __get_user(fpcr, &fpregs->f_fpcntl[0]);
    cpu_m68k_set_fpcr(env, fpcr);
    __get_user(env->fpsr, &fpregs->f_fpcntl[1]);
    /* fpiar is not emulated */

    for (i = 0; i < 8; i++) {
        uint32_t high;
        __get_user(high, &fpregs->f_fpregs[i * 3]);
        env->fregs[i].d.high = high >> 16;
        __get_user(env->fregs[i].d.low,
                   (uint64_t *)&fpregs->f_fpregs[i * 3 + 1]);
    }
}

static inline int target_rt_restore_ucontext(CPUM68KState *env,
                                             struct target_ucontext *uc)
{
    int temp;
    target_greg_t *gregs = uc->tuc_mcontext.gregs;

    __get_user(temp, &uc->tuc_mcontext.version);
    if (temp != TARGET_MCONTEXT_VERSION)
        goto badframe;

    /* restore passed registers */
    __get_user(env->dregs[0], &gregs[0]);
    __get_user(env->dregs[1], &gregs[1]);
    __get_user(env->dregs[2], &gregs[2]);
    __get_user(env->dregs[3], &gregs[3]);
    __get_user(env->dregs[4], &gregs[4]);
    __get_user(env->dregs[5], &gregs[5]);
    __get_user(env->dregs[6], &gregs[6]);
    __get_user(env->dregs[7], &gregs[7]);
    __get_user(env->aregs[0], &gregs[8]);
    __get_user(env->aregs[1], &gregs[9]);
    __get_user(env->aregs[2], &gregs[10]);
    __get_user(env->aregs[3], &gregs[11]);
    __get_user(env->aregs[4], &gregs[12]);
    __get_user(env->aregs[5], &gregs[13]);
    __get_user(env->aregs[6], &gregs[14]);
    __get_user(env->aregs[7], &gregs[15]);
    __get_user(env->pc, &gregs[16]);
    __get_user(temp, &gregs[17]);
    cpu_m68k_set_ccr(env, temp);

    target_rt_restore_fpu_state(env, uc);

    return 0;

badframe:
    return 1;
}

void setup_rt_frame(int sig, struct target_sigaction *ka,
                    target_siginfo_t *info,
                    target_sigset_t *set, CPUM68KState *env)
{
    struct target_rt_sigframe *frame;
    abi_ulong frame_addr;
    abi_ulong retcode_addr;
    abi_ulong info_addr;
    abi_ulong uc_addr;
    int err = 0;
    int i;

    frame_addr = get_sigframe(ka, env, sizeof *frame);
    trace_user_setup_rt_frame(env, frame_addr);
    if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) {
        goto give_sigsegv;
    }

    __put_user(sig, &frame->sig);

    info_addr = frame_addr + offsetof(struct target_rt_sigframe, info);
    __put_user(info_addr, &frame->pinfo);

    uc_addr = frame_addr + offsetof(struct target_rt_sigframe, uc);
    __put_user(uc_addr, &frame->puc);

    tswap_siginfo(&frame->info, info);

    /* Create the ucontext */

    __put_user(0, &frame->uc.tuc_flags);
    __put_user(0, &frame->uc.tuc_link);
    target_save_altstack(&frame->uc.tuc_stack, env);
    err |= target_rt_setup_ucontext(&frame->uc, env);

    if (err)
        goto give_sigsegv;

    for(i = 0; i < TARGET_NSIG_WORDS; i++) {
        __put_user(set->sig[i], &frame->uc.tuc_sigmask.sig[i]);
    }

    /* Set up to return from userspace.  */

    retcode_addr = frame_addr + offsetof(struct target_sigframe, retcode);
    __put_user(retcode_addr, &frame->pretcode);

    /* moveq #,d0; notb d0; trap #0 */

    __put_user(0x70004600 + ((TARGET_NR_rt_sigreturn ^ 0xff) << 16),
               (uint32_t *)(frame->retcode + 0));
    __put_user(0x4e40, (uint16_t *)(frame->retcode + 4));

    if (err)
        goto give_sigsegv;

    /* Set up to return from userspace */

    env->aregs[7] = frame_addr;
    env->pc = ka->_sa_handler;

    unlock_user_struct(frame, frame_addr, 1);
    return;

give_sigsegv:
    unlock_user_struct(frame, frame_addr, 1);
    force_sigsegv(sig);
}

long do_sigreturn(CPUM68KState *env)
{
    struct target_sigframe *frame;
    abi_ulong frame_addr = env->aregs[7] - 4;
    target_sigset_t target_set;
    sigset_t set;
    int i;

    trace_user_do_sigreturn(env, frame_addr);
    if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1))
        goto badframe;

    /* set blocked signals */

    __get_user(target_set.sig[0], &frame->sc.sc_mask);

    for(i = 1; i < TARGET_NSIG_WORDS; i++) {
        __get_user(target_set.sig[i], &frame->extramask[i - 1]);
    }

    target_to_host_sigset_internal(&set, &target_set);
    set_sigmask(&set);

    /* restore registers */

    restore_sigcontext(env, &frame->sc);

    unlock_user_struct(frame, frame_addr, 0);
    return -TARGET_QEMU_ESIGRETURN;

badframe:
    force_sig(TARGET_SIGSEGV);
    return -TARGET_QEMU_ESIGRETURN;
}

long do_rt_sigreturn(CPUM68KState *env)
{
    struct target_rt_sigframe *frame;
    abi_ulong frame_addr = env->aregs[7] - 4;
    sigset_t set;

    trace_user_do_rt_sigreturn(env, frame_addr);
    if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1))
        goto badframe;

    target_to_host_sigset(&set, &frame->uc.tuc_sigmask);
    set_sigmask(&set);

    /* restore registers */

    if (target_rt_restore_ucontext(env, &frame->uc))
        goto badframe;

    if (do_sigaltstack(frame_addr +
                       offsetof(struct target_rt_sigframe, uc.tuc_stack),
                       0, get_sp_from_cpustate(env)) == -EFAULT)
        goto badframe;

    unlock_user_struct(frame, frame_addr, 0);
    return -TARGET_QEMU_ESIGRETURN;

badframe:
    unlock_user_struct(frame, frame_addr, 0);
    force_sig(TARGET_SIGSEGV);
    return -TARGET_QEMU_ESIGRETURN;
}
Commit	Line	Data
befb7447 LV	1	/*
	2	* Emulation of Linux signals
	3	*
	4	* Copyright (c) 2003 Fabrice Bellard
	5	*
	6	* This program is free software; you can redistribute it and/or modify
	7	* it under the terms of the GNU General Public License as published by
	8	* the Free Software Foundation; either version 2 of the License, or
	9	* (at your option) any later version.
	10	*
	11	* This program is distributed in the hope that it will be useful,
	12	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	13	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	14	* GNU General Public License for more details.
	15	*
	16	* You should have received a copy of the GNU General Public License
	17	* along with this program; if not, see <http://www.gnu.org/licenses/>.
	18	*/
4495abcc LV	19	#include "qemu/osdep.h"
4495abcc LV	20	#include "qemu.h"
4495abcc LV	21	#include "signal-common.h"
	22	#include "linux-user/trace.h"
	23
	24	struct target_sigcontext {
	25	abi_ulong sc_mask;
	26	abi_ulong sc_usp;
	27	abi_ulong sc_d0;
	28	abi_ulong sc_d1;
	29	abi_ulong sc_a0;
	30	abi_ulong sc_a1;
	31	unsigned short sc_sr;
	32	abi_ulong sc_pc;
	33	};
	34
	35	struct target_sigframe
	36	{
	37	abi_ulong pretcode;
	38	int sig;
	39	int code;
	40	abi_ulong psc;
	41	char retcode[8];
	42	abi_ulong extramask[TARGET_NSIG_WORDS-1];
	43	struct target_sigcontext sc;
	44	};
	45
	46	typedef int target_greg_t;
	47	#define TARGET_NGREG 18
	48	typedef target_greg_t target_gregset_t[TARGET_NGREG];
	49
	50	typedef struct target_fpregset {
	51	int f_fpcntl[3];
	52	int f_fpregs[8*3];
	53	} target_fpregset_t;
	54
	55	struct target_mcontext {
	56	int version;
	57	target_gregset_t gregs;
	58	target_fpregset_t fpregs;
	59	};
	60
	61	#define TARGET_MCONTEXT_VERSION 2
	62
	63	struct target_ucontext {
	64	abi_ulong tuc_flags;
	65	abi_ulong tuc_link;
	66	target_stack_t tuc_stack;
	67	struct target_mcontext tuc_mcontext;
	68	abi_long tuc_filler[80];
	69	target_sigset_t tuc_sigmask;
	70	};
	71
	72	struct target_rt_sigframe
	73	{
	74	abi_ulong pretcode;
	75	int sig;
	76	abi_ulong pinfo;
	77	abi_ulong puc;
	78	char retcode[8];
	79	struct target_siginfo info;
	80	struct target_ucontext uc;
	81	};
	82
	83	static void setup_sigcontext(struct target_sigcontext sc, CPUM68KState env,
	84	abi_ulong mask)
85	{
86	uint32_t sr = (env->sr & 0xff00) \| cpu_m68k_get_ccr(env);
87	__put_user(mask, &sc->sc_mask);
88	__put_user(env->aregs[7], &sc->sc_usp);
89	__put_user(env->dregs[0], &sc->sc_d0);
90	__put_user(env->dregs[1], &sc->sc_d1);
91	__put_user(env->aregs[0], &sc->sc_a0);
92	__put_user(env->aregs[1], &sc->sc_a1);
93	__put_user(sr, &sc->sc_sr);
94	__put_user(env->pc, &sc->sc_pc);
95	}
96
97	static void
98	restore_sigcontext(CPUM68KState env, struct target_sigcontext sc)
99	{
100	int temp;
101
102	__get_user(env->aregs[7], &sc->sc_usp);
103	__get_user(env->dregs[0], &sc->sc_d0);
104	__get_user(env->dregs[1], &sc->sc_d1);
105	__get_user(env->aregs[0], &sc->sc_a0);
106	__get_user(env->aregs[1], &sc->sc_a1);
107	__get_user(env->pc, &sc->sc_pc);
108	__get_user(temp, &sc->sc_sr);
109	cpu_m68k_set_ccr(env, temp);
110	}
111
112	/*
113	* Determine which stack to use..
114	*/
115	static inline abi_ulong
116	get_sigframe(struct target_sigaction ka, CPUM68KState regs,
117	size_t frame_size)
118	{
465e237b	119	abi_ulong sp;
4495abcc	120
465e237b	121	sp = target_sigsp(get_sp_from_cpustate(regs), ka);
4495abcc	122
4495abcc LV	123
	124	return ((sp - frame_size) & -8UL);
	125	}
	126
	127	void setup_frame(int sig, struct target_sigaction *ka,
	128	target_sigset_t set, CPUM68KState env)
	129	{
	130	struct target_sigframe *frame;
	131	abi_ulong frame_addr;
	132	abi_ulong retcode_addr;
	133	abi_ulong sc_addr;
	134	int i;
	135
	136	frame_addr = get_sigframe(ka, env, sizeof *frame);
	137	trace_user_setup_frame(env, frame_addr);
	138	if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) {
	139	goto give_sigsegv;
	140	}
	141
	142	__put_user(sig, &frame->sig);
	143
	144	sc_addr = frame_addr + offsetof(struct target_sigframe, sc);
	145	__put_user(sc_addr, &frame->psc);
	146
	147	setup_sigcontext(&frame->sc, env, set->sig[0]);
	148
	149	for(i = 1; i < TARGET_NSIG_WORDS; i++) {
	150	__put_user(set->sig[i], &frame->extramask[i - 1]);
	151	}
	152
	153	/* Set up to return from userspace. */
	154
	155	retcode_addr = frame_addr + offsetof(struct target_sigframe, retcode);
	156	__put_user(retcode_addr, &frame->pretcode);
	157
	158	/* moveq #,d0; trap #0 */
	159
	160	__put_user(0x70004e40 + (TARGET_NR_sigreturn << 16),
	161	(uint32_t *)(frame->retcode));
	162
	163	/* Set up to return from userspace */
	164
	165	env->aregs[7] = frame_addr;
	166	env->pc = ka->_sa_handler;
	167
	168	unlock_user_struct(frame, frame_addr, 1);
	169	return;
	170
	171	give_sigsegv:
	172	force_sigsegv(sig);
	173	}
	174
	175	static inline void target_rt_save_fpu_state(struct target_ucontext *uc,
	176	CPUM68KState *env)
	177	{
	178	int i;
	179	target_fpregset_t *fpregs = &uc->tuc_mcontext.fpregs;
	180
	181	__put_user(env->fpcr, &fpregs->f_fpcntl[0]);
	182	__put_user(env->fpsr, &fpregs->f_fpcntl[1]);
	183	/* fpiar is not emulated */
	184
	185	for (i = 0; i < 8; i++) {
	186	uint32_t high = env->fregs[i].d.high << 16;
187	__put_user(high, &fpregs->f_fpregs[i * 3]);
188	__put_user(env->fregs[i].d.low,
189	(uint64_t )&fpregs->f_fpregs[i 3 + 1]);
190	}
191	}
192
193	static inline int target_rt_setup_ucontext(struct target_ucontext *uc,
194	CPUM68KState *env)
195	{
196	target_greg_t *gregs = uc->tuc_mcontext.gregs;
197	uint32_t sr = (env->sr & 0xff00) \| cpu_m68k_get_ccr(env);
198
199	__put_user(TARGET_MCONTEXT_VERSION, &uc->tuc_mcontext.version);
200	__put_user(env->dregs[0], &gregs[0]);
201	__put_user(env->dregs[1], &gregs[1]);
202	__put_user(env->dregs[2], &gregs[2]);
203	__put_user(env->dregs[3], &gregs[3]);
204	__put_user(env->dregs[4], &gregs[4]);
205	__put_user(env->dregs[5], &gregs[5]);
206	__put_user(env->dregs[6], &gregs[6]);
207	__put_user(env->dregs[7], &gregs[7]);
208	__put_user(env->aregs[0], &gregs[8]);
209	__put_user(env->aregs[1], &gregs[9]);
210	__put_user(env->aregs[2], &gregs[10]);
211	__put_user(env->aregs[3], &gregs[11]);
212	__put_user(env->aregs[4], &gregs[12]);
213	__put_user(env->aregs[5], &gregs[13]);
214	__put_user(env->aregs[6], &gregs[14]);
215	__put_user(env->aregs[7], &gregs[15]);
216	__put_user(env->pc, &gregs[16]);
217	__put_user(sr, &gregs[17]);
218
219	target_rt_save_fpu_state(uc, env);
220
221	return 0;
222	}
223
224	static inline void target_rt_restore_fpu_state(CPUM68KState *env,
225	struct target_ucontext *uc)
226	{
227	int i;
228	target_fpregset_t *fpregs = &uc->tuc_mcontext.fpregs;
229	uint32_t fpcr;
230
231	__get_user(fpcr, &fpregs->f_fpcntl[0]);
232	cpu_m68k_set_fpcr(env, fpcr);
233	__get_user(env->fpsr, &fpregs->f_fpcntl[1]);
234	/* fpiar is not emulated */
235
236	for (i = 0; i < 8; i++) {
237	uint32_t high;
238	__get_user(high, &fpregs->f_fpregs[i * 3]);
239	env->fregs[i].d.high = high >> 16;
240	__get_user(env->fregs[i].d.low,
241	(uint64_t )&fpregs->f_fpregs[i 3 + 1]);
242	}
243	}
244
245	static inline int target_rt_restore_ucontext(CPUM68KState *env,
246	struct target_ucontext *uc)
247	{
248	int temp;
249	target_greg_t *gregs = uc->tuc_mcontext.gregs;
250
251	__get_user(temp, &uc->tuc_mcontext.version);
252	if (temp != TARGET_MCONTEXT_VERSION)
253	goto badframe;
254
255	/* restore passed registers */
256	__get_user(env->dregs[0], &gregs[0]);
257	__get_user(env->dregs[1], &gregs[1]);
258	__get_user(env->dregs[2], &gregs[2]);
259	__get_user(env->dregs[3], &gregs[3]);
260	__get_user(env->dregs[4], &gregs[4]);
261	__get_user(env->dregs[5], &gregs[5]);
262	__get_user(env->dregs[6], &gregs[6]);
263	__get_user(env->dregs[7], &gregs[7]);
264	__get_user(env->aregs[0], &gregs[8]);
265	__get_user(env->aregs[1], &gregs[9]);
266	__get_user(env->aregs[2], &gregs[10]);
267	__get_user(env->aregs[3], &gregs[11]);
268	__get_user(env->aregs[4], &gregs[12]);
269	__get_user(env->aregs[5], &gregs[13]);
270	__get_user(env->aregs[6], &gregs[14]);
271	__get_user(env->aregs[7], &gregs[15]);
272	__get_user(env->pc, &gregs[16]);
273	__get_user(temp, &gregs[17]);
274	cpu_m68k_set_ccr(env, temp);
275
276	target_rt_restore_fpu_state(env, uc);
277
278	return 0;
279
280	badframe:
281	return 1;
282	}
283
284	void setup_rt_frame(int sig, struct target_sigaction *ka,
285	target_siginfo_t *info,
286	target_sigset_t set, CPUM68KState env)
287	{
288	struct target_rt_sigframe *frame;
289	abi_ulong frame_addr;
290	abi_ulong retcode_addr;
291	abi_ulong info_addr;
292	abi_ulong uc_addr;
293	int err = 0;
294	int i;
295
296	frame_addr = get_sigframe(ka, env, sizeof *frame);
297	trace_user_setup_rt_frame(env, frame_addr);
298	if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) {
299	goto give_sigsegv;
300	}
301
302	__put_user(sig, &frame->sig);
303
304	info_addr = frame_addr + offsetof(struct target_rt_sigframe, info);
305	__put_user(info_addr, &frame->pinfo);
306
307	uc_addr = frame_addr + offsetof(struct target_rt_sigframe, uc);
308	__put_user(uc_addr, &frame->puc);
309
310	tswap_siginfo(&frame->info, info);
311
312	/* Create the ucontext */
313
314	__put_user(0, &frame->uc.tuc_flags);
315	__put_user(0, &frame->uc.tuc_link);
465e237b	316	target_save_altstack(&frame->uc.tuc_stack, env);
4495abcc LV	317	err \|= target_rt_setup_ucontext(&frame->uc, env);
	318
	319	if (err)
	320	goto give_sigsegv;
	321
	322	for(i = 0; i < TARGET_NSIG_WORDS; i++) {
	323	__put_user(set->sig[i], &frame->uc.tuc_sigmask.sig[i]);
	324	}
	325
	326	/* Set up to return from userspace. */
	327
	328	retcode_addr = frame_addr + offsetof(struct target_sigframe, retcode);
	329	__put_user(retcode_addr, &frame->pretcode);
	330
	331	/* moveq #,d0; notb d0; trap #0 */
	332
	333	__put_user(0x70004600 + ((TARGET_NR_rt_sigreturn ^ 0xff) << 16),
	334	(uint32_t *)(frame->retcode + 0));
	335	__put_user(0x4e40, (uint16_t *)(frame->retcode + 4));
	336
	337	if (err)
	338	goto give_sigsegv;
	339
	340	/* Set up to return from userspace */
	341
	342	env->aregs[7] = frame_addr;
	343	env->pc = ka->_sa_handler;
	344
	345	unlock_user_struct(frame, frame_addr, 1);
	346	return;
	347
	348	give_sigsegv:
	349	unlock_user_struct(frame, frame_addr, 1);
	350	force_sigsegv(sig);
	351	}
	352
	353	long do_sigreturn(CPUM68KState *env)
	354	{
	355	struct target_sigframe *frame;
	356	abi_ulong frame_addr = env->aregs[7] - 4;
	357	target_sigset_t target_set;
	358	sigset_t set;
	359	int i;
	360
	361	trace_user_do_sigreturn(env, frame_addr);
	362	if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1))
	363	goto badframe;
	364
	365	/* set blocked signals */
	366
	367	__get_user(target_set.sig[0], &frame->sc.sc_mask);
	368
	369	for(i = 1; i < TARGET_NSIG_WORDS; i++) {
	370	__get_user(target_set.sig[i], &frame->extramask[i - 1]);
	371	}
	372
	373	target_to_host_sigset_internal(&set, &target_set);
	374	set_sigmask(&set);
	375
	376	/* restore registers */
	377
	378	restore_sigcontext(env, &frame->sc);
	379
	380	unlock_user_struct(frame, frame_addr, 0);
381	return -TARGET_QEMU_ESIGRETURN;
382
383	badframe:
384	force_sig(TARGET_SIGSEGV);
385	return -TARGET_QEMU_ESIGRETURN;
386	}
387
388	long do_rt_sigreturn(CPUM68KState *env)
389	{
390	struct target_rt_sigframe *frame;
391	abi_ulong frame_addr = env->aregs[7] - 4;
392	sigset_t set;
393
394	trace_user_do_rt_sigreturn(env, frame_addr);
395	if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1))
396	goto badframe;
397
398	target_to_host_sigset(&set, &frame->uc.tuc_sigmask);
399	set_sigmask(&set);
400
401	/* restore registers */
402
403	if (target_rt_restore_ucontext(env, &frame->uc))
404	goto badframe;
405
406	if (do_sigaltstack(frame_addr +
407	offsetof(struct target_rt_sigframe, uc.tuc_stack),
408	0, get_sp_from_cpustate(env)) == -EFAULT)
409	goto badframe;
410
411	unlock_user_struct(frame, frame_addr, 0);
412	return -TARGET_QEMU_ESIGRETURN;
413
414	badframe:
415	unlock_user_struct(frame, frame_addr, 0);
416	force_sig(TARGET_SIGSEGV);
417	return -TARGET_QEMU_ESIGRETURN;
418	}