xref: /freebsd-10.1-release/sys/mips/mips/gdb_machdep.c

/*	$NetBSD: kgdb_machdep.c,v 1.11 2005/12/24 22:45:35 perry Exp $	*/

/*-
 * Copyright (c) 2004 Marcel Moolenaar
 * All rights reserved.
 *
 * 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.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``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 AUTHORS 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.
 */
/*-
 * Copyright (c) 1997 The NetBSD Foundation, Inc.
 * All rights reserved.
 *
 * This code is derived from software contributed to The NetBSD Foundation
 * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
 * NASA Ames Research Center.
 *
 * 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.
 *
 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
 */

/*
 * Copyright (c) 1996 Matthias Pfaller.
 * All rights reserved.
 *
 * 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. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *	This product includes software developed by Matthias Pfaller.
 * 4. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
 *
 *	JNPR: gdb_machdep.c,v 1.1 2007/08/09 12:25:25 katta
 * $FreeBSD$
 */

#include <sys/cdefs.h>

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kdb.h>
#include <sys/kernel.h>
#include <sys/signal.h>
#include <sys/pcpu.h>

#include <machine/gdb_machdep.h>
#include <machine/pcb.h>
#include <machine/reg.h>
#include <machine/trap.h>

#include <gdb/gdb.h>

void *
gdb_cpu_getreg(int regnum, size_t *regsz)
{

 	*regsz = gdb_cpu_regsz(regnum);
 	if (kdb_thread == curthread) {
		register_t *zero_ptr = &kdb_frame->zero;
		return zero_ptr + regnum;
	}

	switch (regnum) {
	/*
	 * S0..S7
	 */
	case 16:
	case 17:
	case 18:
	case 19:
	case 20:
	case 21:
	case 22:
	case 23:
 		return (&kdb_thrctx->pcb_context[PCB_REG_S0 + regnum - 16]);
	case 28:
		return (&kdb_thrctx->pcb_context[PCB_REG_GP]);
	case 29:
		return (&kdb_thrctx->pcb_context[PCB_REG_SP]);
	case 30:
		return (&kdb_thrctx->pcb_context[PCB_REG_S8]);
	case 31:
		return (&kdb_thrctx->pcb_context[PCB_REG_RA]);
	case 37:
		return (&kdb_thrctx->pcb_context[PCB_REG_PC]);
	}
	return (NULL);
}

void
gdb_cpu_setreg(int regnum, void *val)
{
	switch (regnum) {
	case GDB_REG_PC:
		kdb_thrctx->pcb_context[10] = *(register_t *)val;
		if (kdb_thread == curthread)
			kdb_frame->pc = *(register_t *)val;
	}
}

int
gdb_cpu_signal(int entry, int code)
{
	switch (entry) {
	case T_TLB_MOD:
	case T_TLB_MOD+T_USER:
	case T_TLB_LD_MISS:
	case T_TLB_ST_MISS:
	case T_TLB_LD_MISS+T_USER:
	case T_TLB_ST_MISS+T_USER:
	case T_ADDR_ERR_LD:		/* misaligned access */
	case T_ADDR_ERR_ST:		/* misaligned access */
	case T_BUS_ERR_LD_ST:		/* BERR asserted to CPU */
	case T_ADDR_ERR_LD+T_USER:	/* misaligned or kseg access */
	case T_ADDR_ERR_ST+T_USER:	/* misaligned or kseg access */
	case T_BUS_ERR_IFETCH+T_USER:	/* BERR asserted to CPU */
	case T_BUS_ERR_LD_ST+T_USER:	/* BERR asserted to CPU */
		return (SIGSEGV);

	case T_BREAK:
	case T_BREAK+T_USER:
		return (SIGTRAP);

	case T_RES_INST+T_USER:
	case T_COP_UNUSABLE+T_USER:
		return (SIGILL);

	case T_FPE+T_USER:
	case T_OVFLOW+T_USER:
		return (SIGFPE);

	default:
		return (SIGEMT);
	}
}