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      1 /*	$NetBSD: core_machdep.c,v 1.10 2022/09/29 07:00:46 skrll Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 1988 University of Utah.
      5  * Copyright (c) 1992, 1993
      6  *	The Regents of the University of California.  All rights reserved.
      7  *
      8  * This code is derived from software contributed to Berkeley by
      9  * the Systems Programming Group of the University of Utah Computer
     10  * Science Department and Ralph Campbell.
     11  *
     12  * Redistribution and use in source and binary forms, with or without
     13  * modification, are permitted provided that the following conditions
     14  * are met:
     15  * 1. Redistributions of source code must retain the above copyright
     16  *    notice, this list of conditions and the following disclaimer.
     17  * 2. Redistributions in binary form must reproduce the above copyright
     18  *    notice, this list of conditions and the following disclaimer in the
     19  *    documentation and/or other materials provided with the distribution.
     20  * 3. Neither the name of the University nor the names of its contributors
     21  *    may be used to endorse or promote products derived from this software
     22  *    without specific prior written permission.
     23  *
     24  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     25  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     26  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     27  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     28  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     29  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     30  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     31  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     32  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     33  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     34  * SUCH DAMAGE.
     35  *
     36  * from: Utah Hdr: vm_machdep.c 1.21 91/04/06
     37  *
     38  *	@(#)vm_machdep.c	8.3 (Berkeley) 1/4/94
     39  */
     40 
     41 #include <sys/cdefs.h>			/* RCS ID & Copyright macro defns */
     42 __KERNEL_RCSID(0, "$NetBSD: core_machdep.c,v 1.10 2022/09/29 07:00:46 skrll Exp $");
     43 
     44 #include <sys/param.h>
     45 #include <sys/systm.h>
     46 #include <sys/proc.h>
     47 #include <sys/buf.h>
     48 #include <sys/vnode.h>
     49 #include <sys/core.h>
     50 #include <sys/exec.h>
     51 #include <sys/cpu.h>
     52 #include <sys/compat_stub.h>
     53 
     54 #include <uvm/uvm_extern.h>
     55 
     56 #include <mips/locore.h>
     57 #include <mips/pcb.h>
     58 #include <mips/cache.h>
     59 #include <mips/regnum.h>
     60 #include <mips/pte.h>
     61 #include <mips/psl.h>
     62 
     63 /*
     64  * Dump the machine specific segment at the start of a core dump.
     65  */
     66 int
     67 cpu_coredump(struct lwp *l, struct coredump_iostate *iocookie,
     68     struct core *chdr)
     69 {
     70 	int error;
     71 	struct coreseg cseg;
     72 	struct cpustate {
     73 		struct trapframe tf;
     74 		struct fpreg fpregs;
     75 	} cpustate;
     76 
     77 	if (iocookie == NULL) {
     78 		CORE_SETMAGIC(*chdr, COREMAGIC, MID_MACHINE, 0);
     79 		chdr->c_hdrsize = ALIGN(sizeof(struct core));
     80 		chdr->c_seghdrsize = ALIGN(sizeof(struct coreseg));
     81 		chdr->c_cpusize = sizeof(struct cpustate);
     82 		chdr->c_nseg++;
     83 		return 0;
     84 	}
     85 
     86 	pcu_save_all(l);
     87 	cpustate.tf = *l->l_md.md_utf;
     88 	cpustate.fpregs = ((struct pcb *)lwp_getpcb(l))->pcb_fpregs;
     89 
     90 	CORE_SETMAGIC(cseg, CORESEGMAGIC, MID_MACHINE, CORE_CPU);
     91 	cseg.c_addr = 0;
     92 	cseg.c_size = chdr->c_cpusize;
     93 
     94 	MODULE_HOOK_CALL(coredump_write_hook, (iocookie, UIO_SYSSPACE, &cseg,
     95 	    chdr->c_seghdrsize), ENOSYS, error);
     96 	if (error)
     97 		return error;
     98 
     99 	MODULE_HOOK_CALL(coredump_write_hook, (iocookie, UIO_SYSSPACE,
    100 	    &cpustate, chdr->c_cpusize), ENOSYS, error);
    101 
    102 	return error;
    103 }
    104