FreeBSD/Linux Kernel Cross Reference
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.
     * 3. All advertising materials mentioning features or use of this software
     *    must display the following acknowledgement:
     *      This product includes software developed by the NetBSD
     *      Foundation, Inc. and its contributors.
     * 4. Neither the name of The NetBSD Foundation nor the names of its
     *    contributors may be used to endorse or promote products derived
     *    from this software without specific prior written permission.
     *
     * 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: releng/8.4/sys/mips/mips/gdb_machdep.c 231151 2012-02-07 19:23:31Z jhb $
     */
    
    #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);
           }
   }

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