/*-
 * Copyright (c) 2017 John Baldwin <jhb@FreeBSD.org>
 *
 * 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 AUTHOR 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 AUTHOR 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.
 *
 */

#include <sys/types.h>
#include <sys/elf.h>
#include <sys/proc.h>
#include <sys/ptrace.h>
#include <sys/reg.h>
#include <machine/pcb.h>
#ifdef VFP
#include <machine/vfp.h>
#endif

#ifdef VFP
static bool
get_arm_vfp(struct regset *rs, struct thread *td, void *buf, size_t *sizep)
{
        if (buf != NULL) {
                KASSERT(*sizep == sizeof(mcontext_vfp_t),
                    ("%s: invalid size", __func__));
                get_vfpcontext(td, buf);
        }
        *sizep = sizeof(mcontext_vfp_t);
        return (true);
}

static bool
set_arm_vfp(struct regset *rs, struct thread *td, void *buf,
    size_t size)
{
        KASSERT(size == sizeof(mcontext_vfp_t), ("%s: invalid size", __func__));
        set_vfpcontext(td, buf);
        return (true);
}

static struct regset regset_arm_vfp = {
        .note = NT_ARM_VFP,
        .size = sizeof(mcontext_vfp_t),
        .get = get_arm_vfp,
        .set = set_arm_vfp,
};
ELF_REGSET(regset_arm_vfp);
#endif

static bool
get_arm_tls(struct regset *rs, struct thread *td, void *buf,
    size_t *sizep)
{
        if (buf != NULL) {
                KASSERT(*sizep == sizeof(td->td_pcb->pcb_regs.sf_tpidrurw),
                    ("%s: invalid size", __func__));
                memcpy(buf, &td->td_pcb->pcb_regs.sf_tpidrurw,
                    sizeof(td->td_pcb->pcb_regs.sf_tpidrurw));
        }
        *sizep = sizeof(td->td_pcb->pcb_regs.sf_tpidrurw);

        return (true);
}

static struct regset regset_arm_tls = {
        .note = NT_ARM_TLS,
        .size = sizeof(uint32_t),
        .get = get_arm_tls,
};
ELF_REGSET(regset_arm_tls);

int
cpu_ptrace(struct thread *td, int req, void *addr, int data)
{
#ifdef VFP
        mcontext_vfp_t vfp;
#endif
        int error;

        switch (req) {
#ifdef VFP
        case PT_GETVFPREGS:
                get_vfpcontext(td, &vfp);
                error = copyout(&vfp, addr, sizeof(vfp));
                break;
        case PT_SETVFPREGS:
                error = copyin(addr, &vfp, sizeof(vfp));
                if (error == 0)
                        set_vfpcontext(td, &vfp);
                break;
#endif
        default:
                error = EINVAL;
        }

        return (error);
}