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      1 /* $NetBSD: core_machdep.c,v 1.11 2021/07/04 22:42:35 thorpej Exp $ */
      2 
      3 /*
      4  * Copyright (c) 1994, 1995, 1996 Carnegie-Mellon University.
      5  * All rights reserved.
      6  *
      7  * Author: Chris G. Demetriou
      8  *
      9  * Permission to use, copy, modify and distribute this software and
     10  * its documentation is hereby granted, provided that both the copyright
     11  * notice and this permission notice appear in all copies of the
     12  * software, derivative works or modified versions, and any portions
     13  * thereof, and that both notices appear in supporting documentation.
     14  *
     15  * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
     16  * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
     17  * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
     18  *
     19  * Carnegie Mellon requests users of this software to return to
     20  *
     21  *  Software Distribution Coordinator  or  Software.Distribution (at) CS.CMU.EDU
     22  *  School of Computer Science
     23  *  Carnegie Mellon University
     24  *  Pittsburgh PA 15213-3890
     25  *
     26  * any improvements or extensions that they make and grant Carnegie the
     27  * rights to redistribute these changes.
     28  */
     29 
     30 #include <sys/cdefs.h>			/* RCS ID & Copyright macro defns */
     31 
     32 __KERNEL_RCSID(0, "$NetBSD: core_machdep.c,v 1.11 2021/07/04 22:42:35 thorpej Exp $");
     33 
     34 #include <sys/param.h>
     35 #include <sys/systm.h>
     36 #include <sys/proc.h>
     37 #include <sys/buf.h>
     38 #include <sys/vnode.h>
     39 #include <sys/core.h>
     40 #include <sys/exec.h>
     41 #include <sys/compat_stub.h>
     42 
     43 #include <sys/exec_aout.h>
     44 
     45 #include <machine/cpu.h>
     46 #include <machine/alpha.h>
     47 #include <machine/pmap.h>
     48 #include <machine/reg.h>
     49 
     50 /*
     51  * Dump the machine specific header information at the start of a core dump.
     52  */
     53 int
     54 cpu_coredump(struct lwp *l, struct coredump_iostate *iocookie,
     55     struct core *chdr)
     56 {
     57 	int error;
     58 	struct md_coredump cpustate;
     59 	struct coreseg cseg;
     60 
     61 	if (iocookie == NULL) {
     62 		CORE_SETMAGIC(*chdr, COREMAGIC, MID_MACHINE, 0);
     63 		chdr->c_hdrsize = ALIGN(sizeof(*chdr));
     64 		chdr->c_seghdrsize = ALIGN(sizeof(cseg));
     65 		chdr->c_cpusize = sizeof(cpustate);
     66 		chdr->c_nseg++;
     67 		return 0;
     68 	}
     69 
     70 	pcu_save_all(l);
     71 	cpustate.md_tf = *l->l_md.md_tf;
     72 	cpustate.md_tf.tf_regs[FRAME_SP] = alpha_pal_rdusp();	/* XXX */
     73 	if (fpu_valid_p(l)) {
     74 		cpustate.md_fpstate = ((struct pcb *)lwp_getpcb(l))->pcb_fp;
     75 	} else
     76 		memset(&cpustate.md_fpstate, 0, sizeof(cpustate.md_fpstate));
     77 
     78 	CORE_SETMAGIC(cseg, CORESEGMAGIC, MID_MACHINE, CORE_CPU);
     79 	cseg.c_addr = 0;
     80 	cseg.c_size = chdr->c_cpusize;
     81 
     82 	MODULE_HOOK_CALL(coredump_write_hook, (iocookie, UIO_SYSSPACE, &cseg,
     83 	    chdr->c_seghdrsize), ENOSYS, error);
     84 	if (error)
     85 		return error;
     86 
     87 	MODULE_HOOK_CALL(coredump_write_hook, (iocookie, UIO_SYSSPACE,
     88 	    &cpustate, sizeof(cpustate)), ENOSYS, error);
     89 
     90 	return error;
     91 }
     92