/* $NetBSD: core_machdep.c,v 1.11 2021/07/04 22:42:35 thorpej Exp $ */

/*
 * Copyright (c) 1994, 1995, 1996 Carnegie-Mellon University.
 * All rights reserved.
 *
 * Author: Chris G. Demetriou
 *
 * Permission to use, copy, modify and distribute this software and
 * its documentation is hereby granted, provided that both the copyright
 * notice and this permission notice appear in all copies of the
 * software, derivative works or modified versions, and any portions
 * thereof, and that both notices appear in supporting documentation.
 *
 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
 * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
 * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
 *
 * Carnegie Mellon requests users of this software to return to
 *
 *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
 *  School of Computer Science
 *  Carnegie Mellon University
 *  Pittsburgh PA 15213-3890
 *
 * any improvements or extensions that they make and grant Carnegie the
 * rights to redistribute these changes.
 */

#include <sys/cdefs.h>                  /* RCS ID & Copyright macro defns */

__KERNEL_RCSID(0, "$NetBSD: core_machdep.c,v 1.11 2021/07/04 22:42:35 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/cpu.h>
#include <machine/alpha.h>
#include <machine/pmap.h>
#include <machine/reg.h>

/*
 * Dump the machine specific header information at the start of a core dump.
 */
int
cpu_coredump(struct lwp *l, struct coredump_iostate *iocookie,
    struct core *chdr)
{
        int error;
        struct md_coredump cpustate;
        struct coreseg cseg;

        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(cpustate);
                chdr->c_nseg++;
                return 0;
        }

        pcu_save_all(l);
        cpustate.md_tf = *l->l_md.md_tf;
        cpustate.md_tf.tf_regs[FRAME_SP] = alpha_pal_rdusp();   /* XXX */
        if (fpu_valid_p(l)) {
                cpustate.md_fpstate = ((struct pcb *)lwp_getpcb(l))->pcb_fp;
        } else
                memset(&cpustate.md_fpstate, 0, sizeof(cpustate.md_fpstate));

        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,
            &cpustate, sizeof(cpustate)), ENOSYS, error);

        return error;
}