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      1 /* $NetBSD: core_machdep.c,v 1.6 2021/09/23 15:19:03 ryo Exp $ */
      2 
      3 /*-
      4  * Copyright (c) 2014 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Matt Thomas of 3am Software Foundry.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29  * POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 
     32 #include <sys/cdefs.h>
     33 
     34 __KERNEL_RCSID(1, "$NetBSD: core_machdep.c,v 1.6 2021/09/23 15:19:03 ryo Exp $");
     35 
     36 #include <sys/types.h>
     37 #include <sys/cpu.h>
     38 #include <sys/exec.h>
     39 #include <sys/core.h>
     40 #include <sys/lwp.h>
     41 #include <sys/compat_stub.h>
     42 
     43 #include <aarch64/pcb.h>
     44 #include <aarch64/frame.h>
     45 #include <aarch64/machdep.h>
     46 #include <aarch64/armreg.h>
     47 
     48 /*
     49  * Write the machine-dependent part of a core dump.
     50  */
     51 int
     52 cpu_coredump(struct lwp *l, struct coredump_iostate *iocookie,
     53     struct core *chdr)
     54 {
     55 	struct coreseg cseg;
     56 	struct md_coredump md_core;
     57 	struct pcb * const pcb = lwp_getpcb(l);
     58 	int error;
     59 
     60 	if (iocookie == NULL) {
     61 		CORE_SETMAGIC(*chdr, COREMAGIC, MID_MACHINE, 0);
     62 		chdr->c_hdrsize = ALIGN(sizeof(*chdr));
     63 		chdr->c_seghdrsize = ALIGN(sizeof(cseg));
     64 		chdr->c_cpusize = sizeof(md_core);
     65 		chdr->c_nseg++;
     66 		return 0;
     67 	}
     68 
     69 	md_core.reg = lwp_trapframe(l)->tf_regs;
     70 	md_core.reg.r_tpidr = (uint64_t)(uintptr_t)l->l_private;
     71 
     72 	fpu_save(l);
     73 	if (fpu_used_p(l)) {
     74 		md_core.fpreg = pcb->pcb_fpregs;
     75 	} else {
     76 		memset(&md_core.fpreg, 0, sizeof(md_core.fpreg));
     77 	}
     78 
     79 	CORE_SETMAGIC(cseg, CORESEGMAGIC, MID_MACHINE, CORE_CPU);
     80 	cseg.c_addr = 0;
     81 	cseg.c_size = chdr->c_cpusize;
     82 
     83 	MODULE_HOOK_CALL(coredump_write_hook, (iocookie, UIO_SYSSPACE, &cseg,
     84 		    chdr->c_seghdrsize), ENOSYS, error);
     85 	if (error)
     86 		return error;
     87 
     88 	MODULE_HOOK_CALL(coredump_write_hook, (iocookie, UIO_SYSSPACE, &md_core,
     89 	    sizeof(md_core)), ENOSYS, error);
     90 
     91 	return error;
     92 }
     93