/*      $NetBSD: core_machdep.c,v 1.9 2025/11/06 20:28:41 thorpej Exp $ */

/*
 * Copyright (c) 1988 University of Utah.
 * Copyright (c) 1982, 1986, 1990, 1993
 *      The Regents of the University of California.  All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * the Systems Programming Group of the University of Utah Computer
 * Science Department.
 *
 * 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.
 * 3. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
 *
 * from: Utah $Hdr: vm_machdep.c 1.21 91/04/06$
 *
 *      @(#)vm_machdep.c        8.6 (Berkeley) 1/12/94
 */

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: core_machdep.c,v 1.9 2025/11/06 20:28:41 thorpej Exp $");

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/proc.h>
#include <sys/buf.h>
#include <sys/vnode.h>
#include <sys/core.h>
#include <sys/exec.h>
#include <sys/compat_stub.h>

#include <sys/exec_aout.h>

#include <machine/frame.h>
#include <machine/cpu.h>
#include <machine/reg.h>

#include <uvm/uvm_extern.h>

/*
 * Dump the machine specific header information at the start of a core dump.
 */
struct md_core {
        struct reg intreg;
        struct fpreg freg;
};

int
cpu_coredump(struct lwp *l, struct coredump_iostate *iocookie,
    struct core *chdr)
{
        struct md_core md_core;
        struct coreseg cseg;
        int error;

        if (iocookie == NULL) {
                CORE_SETMAGIC(*chdr, COREMAGIC, MID_MACHINE, 0);
                chdr->c_hdrsize = ALIGN(sizeof(*chdr));
                chdr->c_seghdrsize = ALIGN(sizeof(cseg));
                chdr->c_cpusize = sizeof(md_core);
                chdr->c_nseg++;
                return 0;
        }

        /* Save integer registers. */
        error = process_read_regs(l, &md_core.intreg);
        if (error)
                return error;

        if (fputype) {
                /* Save floating point registers. */
                error = process_read_fpregs(l, &md_core.freg, NULL);
                if (error)
                        return error;
        } else {
                /* Make sure these are clear. */
                memset((void *)&md_core.freg, 0, sizeof(md_core.freg));
        }

        CORE_SETMAGIC(cseg, CORESEGMAGIC, MID_MACHINE, CORE_CPU);
        cseg.c_addr = 0;
        cseg.c_size = chdr->c_cpusize;

        MODULE_HOOK_CALL(coredump_write_hook, (iocookie, UIO_SYSSPACE, &cseg,
            chdr->c_seghdrsize), ENOSYS, error);
        if (error)
                return error;

        MODULE_HOOK_CALL(coredump_write_hook, (iocookie, UIO_SYSSPACE, &md_core,
            sizeof(md_core)), ENOSYS, error);

        return error;
}