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  * Copyright (c) 2004 Marcel Moolenaar
    5  * All rights reserved.
    6  *
    7  * Redistribution and use in source and binary forms, with or without
    8  * modification, are permitted provided that the following conditions
    9  * are met:
   10  *
   11  * 1. Redistributions of source code must retain the above copyright
   12  *    notice, this list of conditions and the following disclaimer.
   13  * 2. Redistributions in binary form must reproduce the above copyright
   14  *    notice, this list of conditions and the following disclaimer in the
   15  *    documentation and/or other materials provided with the distribution.
   16  *
   17  * THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR
   18  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   19  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   20  * IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT,
   21  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   22  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   23  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   24  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
   26  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   27  */
   28 /*-
   29  * Copyright (c) 1997 The NetBSD Foundation, Inc.
   30  * All rights reserved.
   31  *
   32  * This code is derived from software contributed to The NetBSD Foundation
   33  * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
   34  * NASA Ames Research Center.
   35  *
   36  * Redistribution and use in source and binary forms, with or without
   37  * modification, are permitted provided that the following conditions
   38  * are met:
   39  * 1. Redistributions of source code must retain the above copyright
   40  *    notice, this list of conditions and the following disclaimer.
   41  * 2. Redistributions in binary form must reproduce the above copyright
   42  *    notice, this list of conditions and the following disclaimer in the
   43  *    documentation and/or other materials provided with the distribution.
   44  * 3. All advertising materials mentioning features or use of this software
   45  *    must display the following acknowledgement:
   46  *      This product includes software developed by the NetBSD
   47  *      Foundation, Inc. and its contributors.
   48  * 4. Neither the name of The NetBSD Foundation nor the names of its
   49  *    contributors may be used to endorse or promote products derived
   50  *    from this software without specific prior written permission.
   51  *
   52  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
   53  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
   54  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
   55  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
   56  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
   57  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
   58  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
   59  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
   60  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
   61  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
   62  * POSSIBILITY OF SUCH DAMAGE.
   63  */
   64 
   65 /*
   66  * Copyright (c) 1996 Matthias Pfaller.
   67  * All rights reserved.
   68  *
   69  * Redistribution and use in source and binary forms, with or without
   70  * modification, are permitted provided that the following conditions
   71  * are met:
   72  * 1. Redistributions of source code must retain the above copyright
   73  *    notice, this list of conditions and the following disclaimer.
   74  * 2. Redistributions in binary form must reproduce the above copyright
   75  *    notice, this list of conditions and the following disclaimer in the
   76  *    documentation and/or other materials provided with the distribution.
   77  * 3. All advertising materials mentioning features or use of this software
   78  *    must display the following acknowledgement:
   79  *      This product includes software developed by Matthias Pfaller.
   80  * 4. The name of the author may not be used to endorse or promote products
   81  *    derived from this software without specific prior written permission
   82  *
   83  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
   84  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   85  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   86  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
   87  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   88  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   89  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   90  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   91  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
   92  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   93  *
   94  *      JNPR: gdb_machdep.c,v 1.1 2007/08/09 12:25:25 katta
   95  * $FreeBSD: releng/8.4/sys/mips/mips/gdb_machdep.c 231151 2012-02-07 19:23:31Z jhb $
   96  */
   97 
   98 #include <sys/cdefs.h>
   99 
  100 #include <sys/param.h>
  101 #include <sys/systm.h>
  102 #include <sys/kdb.h>
  103 #include <sys/kernel.h>
  104 #include <sys/signal.h>
  105 #include <sys/pcpu.h>
  106 
  107 #include <machine/gdb_machdep.h>
  108 #include <machine/pcb.h>
  109 #include <machine/reg.h>
  110 #include <machine/trap.h>
  111 
  112 #include <gdb/gdb.h>
  113 
  114 void *
  115 gdb_cpu_getreg(int regnum, size_t *regsz)
  116 {
  117 
  118         *regsz = gdb_cpu_regsz(regnum);
  119         if (kdb_thread == curthread) {
  120                 register_t *zero_ptr = &kdb_frame->zero;
  121                 return zero_ptr + regnum;
  122         }
  123         
  124         switch (regnum) {
  125         /* 
  126          * S0..S7
  127          */
  128         case 16:
  129         case 17:
  130         case 18:
  131         case 19:
  132         case 20:
  133         case 21:
  134         case 22:
  135         case 23:
  136                 return (&kdb_thrctx->pcb_context[PCB_REG_S0 + regnum - 16]);
  137         case 28: 
  138                 return (&kdb_thrctx->pcb_context[PCB_REG_GP]);
  139         case 29: 
  140                 return (&kdb_thrctx->pcb_context[PCB_REG_SP]);
  141         case 30: 
  142                 return (&kdb_thrctx->pcb_context[PCB_REG_S8]);
  143         case 31: 
  144                 return (&kdb_thrctx->pcb_context[PCB_REG_RA]);
  145         case 37: 
  146                 return (&kdb_thrctx->pcb_context[PCB_REG_PC]);
  147         }
  148         return (NULL);
  149 }
  150 
  151 void
  152 gdb_cpu_setreg(int regnum, void *val)
  153 {
  154         switch (regnum) {
  155         case GDB_REG_PC:
  156                 kdb_thrctx->pcb_context[10] = *(register_t *)val;
  157                 if (kdb_thread == curthread)
  158                         kdb_frame->pc = *(register_t *)val;
  159         }
  160 }
  161 
  162 int
  163 gdb_cpu_signal(int entry, int code)
  164 {
  165         switch (entry) {
  166         case T_TLB_MOD:
  167         case T_TLB_MOD+T_USER:
  168         case T_TLB_LD_MISS:
  169         case T_TLB_ST_MISS:
  170         case T_TLB_LD_MISS+T_USER:
  171         case T_TLB_ST_MISS+T_USER:
  172         case T_ADDR_ERR_LD:             /* misaligned access */
  173         case T_ADDR_ERR_ST:             /* misaligned access */
  174         case T_BUS_ERR_LD_ST:           /* BERR asserted to CPU */
  175         case T_ADDR_ERR_LD+T_USER:      /* misaligned or kseg access */
  176         case T_ADDR_ERR_ST+T_USER:      /* misaligned or kseg access */
  177         case T_BUS_ERR_IFETCH+T_USER:   /* BERR asserted to CPU */
  178         case T_BUS_ERR_LD_ST+T_USER:    /* BERR asserted to CPU */
  179                 return (SIGSEGV);
  180 
  181         case T_BREAK:
  182         case T_BREAK+T_USER:
  183                 return (SIGTRAP);
  184 
  185         case T_RES_INST+T_USER:
  186         case T_COP_UNUSABLE+T_USER:
  187                 return (SIGILL);
  188 
  189         case T_FPE+T_USER:
  190         case T_OVFLOW+T_USER:
  191                 return (SIGFPE);
  192 
  193         default:
  194                 return (SIGEMT);
  195         }
  196 }

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