/*      $NetBSD: core_netbsd.c,v 1.24 2019/11/20 19:37:53 pgoyette Exp $        */

/*
* Copyright (c) 1997 Charles D. Cranor and Washington University.
* Copyright (c) 1991, 1993 The Regents of the University of California.
* Copyright (c) 1988 University of Utah.
*
* 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 $Hdr: vm_unix.c 1.1 89/11/07$
*      @(#)vm_unix.c   8.1 (Berkeley) 6/11/93
* from: NetBSD: uvm_unix.c,v 1.25 2001/11/10 07:37:01 lukem Exp
*/

/*
* core_netbsd.c: Support for the historic NetBSD core file format.
*/

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: core_netbsd.c,v 1.24 2019/11/20 19:37:53 pgoyette Exp $");

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

#include <uvm/uvm_extern.h>

#ifndef CORENAME
#define CORENAME(x)     x
#endif
#ifdef COREINC
#include COREINC
#endif

struct coredump_state {
       struct coredump_iostate *iocookie;
       struct CORENAME(core) core;
};

static int      CORENAME(coredump_writesegs_netbsd)(struct uvm_coredump_state *);

int
CORENAME(real_coredump_netbsd)(struct lwp *l, struct coredump_iostate *iocookie)
{
       struct coredump_state cs;
       struct proc *p = l->l_proc;
       struct vmspace *vm = p->p_vmspace;
       int error;

       cs.iocookie = iocookie;
       cs.core.c_midmag = 0;
       strncpy(cs.core.c_name, p->p_comm, MAXCOMLEN);
       cs.core.c_nseg = 0;
       cs.core.c_signo = p->p_sigctx.ps_info._signo;
       cs.core.c_ucode = p->p_sigctx.ps_info._code;
       cs.core.c_cpusize = 0;
       cs.core.c_tsize = (u_long)ctob(vm->vm_tsize);
       cs.core.c_dsize = (u_long)ctob(vm->vm_dsize);
       cs.core.c_ssize = (u_long)round_page(ctob(vm->vm_ssize));

       error = CORENAME(cpu_coredump)(l, NULL, &cs.core);
       if (error)
               return (error);
       MODULE_HOOK_CALL(uvm_coredump_count_segs_hook, (p), 0, cs.core.c_nseg);

       /* First write out the core header. */
       MODULE_HOOK_CALL(coredump_write_hook, (iocookie, UIO_SYSSPACE, &cs.core,
           cs.core.c_hdrsize), ENOSYS, error);
       if (error)
               return (error);

       /* Then the CPU specific stuff */
       error = CORENAME(cpu_coredump)(l, iocookie, &cs.core);
       if (error)
               return (error);

       /* Finally, the address space dump */
       MODULE_HOOK_CALL(uvm_coredump_walkmap_hook,
           (p, CORENAME(coredump_writesegs_netbsd), &cs), ENOSYS, error);

       return error;
}

static int
CORENAME(coredump_writesegs_netbsd)(struct uvm_coredump_state *us)
{
       struct coredump_state *cs = us->cookie;
       struct CORENAME(coreseg) cseg;
       int flag, error;

       if (us->flags & UVM_COREDUMP_STACK)
               flag = CORE_STACK;
       else
               flag = CORE_DATA;

       /*
        * Set up a new core file segment.
        */
       CORE_SETMAGIC(cseg, CORESEGMAGIC, CORE_GETMID(cs->core), flag);
       cseg.c_addr = us->start;

       if (us->start == us->realend)
               /* Not really wanted, but counted... */
               cseg.c_size = 0;
       else
               cseg.c_size = us->end - us->start;

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

       MODULE_HOOK_CALL(coredump_write_hook, (cs->iocookie, UIO_USERSPACE,
           (void *)(vaddr_t)us->start, cseg.c_size), ENOSYS, error);

       return error;
}