The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/mips/mips/gdb_machdep.c

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    1 /*      $NetBSD: kgdb_machdep.c,v 1.11 2005/12/24 22:45:35 perry Exp $  */
    2 
    3 /*-
    4  * SPDX-License-Identifier: BSD-2-Clause-FreeBSD AND BSD-2-Clause-NetBSD
    5  *
    6  * Copyright (c) 2004 Marcel Moolenaar
    7  * All rights reserved.
    8  *
    9  * Redistribution and use in source and binary forms, with or without
   10  * modification, are permitted provided that the following conditions
   11  * are met:
   12  *
   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 AUTHORS ``AS IS'' AND ANY EXPRESS OR
   20  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   21  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   22  * IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT,
   23  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   24  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   25  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   26  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   27  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
   28  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   29  */
   30 /*-
   31  * Copyright (c) 1997 The NetBSD Foundation, Inc.
   32  * All rights reserved.
   33  *
   34  * This code is derived from software contributed to The NetBSD Foundation
   35  * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
   36  * NASA Ames Research Center.
   37  *
   38  * Redistribution and use in source and binary forms, with or without
   39  * modification, are permitted provided that the following conditions
   40  * are met:
   41  * 1. Redistributions of source code must retain the above copyright
   42  *    notice, this list of conditions and the following disclaimer.
   43  * 2. Redistributions in binary form must reproduce the above copyright
   44  *    notice, this list of conditions and the following disclaimer in the
   45  *    documentation and/or other materials provided with the distribution.
   46  *
   47  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
   48  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
   49  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
   50  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
   51  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
   52  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
   53  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
   54  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
   55  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
   56  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
   57  * POSSIBILITY OF SUCH DAMAGE.
   58  */
   59 
   60 /*
   61  * Copyright (c) 1996 Matthias Pfaller.
   62  * All rights reserved.
   63  *
   64  * Redistribution and use in source and binary forms, with or without
   65  * modification, are permitted provided that the following conditions
   66  * are met:
   67  * 1. Redistributions of source code must retain the above copyright
   68  *    notice, this list of conditions and the following disclaimer.
   69  * 2. Redistributions in binary form must reproduce the above copyright
   70  *    notice, this list of conditions and the following disclaimer in the
   71  *    documentation and/or other materials provided with the distribution.
   72  * 3. All advertising materials mentioning features or use of this software
   73  *    must display the following acknowledgement:
   74  *      This product includes software developed by Matthias Pfaller.
   75  * 4. The name of the author may not be used to endorse or promote products
   76  *    derived from this software without specific prior written permission
   77  *
   78  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
   79  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   80  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   81  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
   82  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   83  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   84  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   85  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   86  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
   87  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   88  *
   89  *      JNPR: gdb_machdep.c,v 1.1 2007/08/09 12:25:25 katta
   90  * $FreeBSD: stable/12/sys/mips/mips/gdb_machdep.c 326259 2017-11-27 15:07:26Z pfg $
   91  */
   92 
   93 #include <sys/cdefs.h>
   94 
   95 #include <sys/param.h>
   96 #include <sys/systm.h>
   97 #include <sys/kdb.h>
   98 #include <sys/kernel.h>
   99 #include <sys/signal.h>
  100 #include <sys/pcpu.h>
  101 
  102 #include <machine/gdb_machdep.h>
  103 #include <machine/pcb.h>
  104 #include <machine/reg.h>
  105 #include <machine/trap.h>
  106 
  107 #include <gdb/gdb.h>
  108 
  109 void *
  110 gdb_cpu_getreg(int regnum, size_t *regsz)
  111 {
  112 
  113         *regsz = gdb_cpu_regsz(regnum);
  114         if (kdb_thread == curthread) {
  115                 register_t *zero_ptr = &kdb_frame->zero;
  116                 return zero_ptr + regnum;
  117         }
  118         
  119         switch (regnum) {
  120         /* 
  121          * S0..S7
  122          */
  123         case 16:
  124         case 17:
  125         case 18:
  126         case 19:
  127         case 20:
  128         case 21:
  129         case 22:
  130         case 23:
  131                 return (&kdb_thrctx->pcb_context[PCB_REG_S0 + regnum - 16]);
  132         case 28: 
  133                 return (&kdb_thrctx->pcb_context[PCB_REG_GP]);
  134         case 29: 
  135                 return (&kdb_thrctx->pcb_context[PCB_REG_SP]);
  136         case 30: 
  137                 return (&kdb_thrctx->pcb_context[PCB_REG_S8]);
  138         case 31: 
  139                 return (&kdb_thrctx->pcb_context[PCB_REG_RA]);
  140         case 37: 
  141                 return (&kdb_thrctx->pcb_context[PCB_REG_PC]);
  142         }
  143         return (NULL);
  144 }
  145 
  146 void
  147 gdb_cpu_setreg(int regnum, void *val)
  148 {
  149         switch (regnum) {
  150         case GDB_REG_PC:
  151                 kdb_thrctx->pcb_context[10] = *(register_t *)val;
  152                 if (kdb_thread == curthread)
  153                         kdb_frame->pc = *(register_t *)val;
  154         }
  155 }
  156 
  157 int
  158 gdb_cpu_signal(int entry, int code)
  159 {
  160         switch (entry) {
  161         case T_TLB_MOD:
  162         case T_TLB_MOD+T_USER:
  163         case T_TLB_LD_MISS:
  164         case T_TLB_ST_MISS:
  165         case T_TLB_LD_MISS+T_USER:
  166         case T_TLB_ST_MISS+T_USER:
  167         case T_ADDR_ERR_LD:             /* misaligned access */
  168         case T_ADDR_ERR_ST:             /* misaligned access */
  169         case T_BUS_ERR_LD_ST:           /* BERR asserted to CPU */
  170         case T_ADDR_ERR_LD+T_USER:      /* misaligned or kseg access */
  171         case T_ADDR_ERR_ST+T_USER:      /* misaligned or kseg access */
  172         case T_BUS_ERR_IFETCH+T_USER:   /* BERR asserted to CPU */
  173         case T_BUS_ERR_LD_ST+T_USER:    /* BERR asserted to CPU */
  174                 return (SIGSEGV);
  175 
  176         case T_BREAK:
  177         case T_BREAK+T_USER:
  178                 return (SIGTRAP);
  179 
  180         case T_RES_INST+T_USER:
  181         case T_COP_UNUSABLE+T_USER:
  182                 return (SIGILL);
  183 
  184         case T_FPE+T_USER:
  185         case T_OVFLOW+T_USER:
  186                 return (SIGFPE);
  187 
  188         default:
  189                 return (SIGEMT);
  190         }
  191 }

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