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/powerpc/powerpc/gdb_machdep.c

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    1 /*-
    2  * Copyright (c) 2006 Marcel Moolenaar
    3  * All rights reserved.
    4  *
    5  * Redistribution and use in source and binary forms, with or without
    6  * modification, are permitted provided that the following conditions
    7  * are met:
    8  *
    9  * 1. Redistributions of source code must retain the above copyright
   10  *    notice, this list of conditions and the following disclaimer.
   11  * 2. Redistributions in binary form must reproduce the above copyright
   12  *    notice, this list of conditions and the following disclaimer in the
   13  *    documentation and/or other materials provided with the distribution.
   14  *
   15  * THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR
   16  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   17  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   18  * IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT,
   19  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   20  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   21  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   22  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   23  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
   24  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   25  */
   26 
   27 #include <sys/cdefs.h>
   28 __FBSDID("$FreeBSD: releng/8.4/sys/powerpc/powerpc/gdb_machdep.c 177288 2008-03-17 00:46:52Z marcel $");
   29 
   30 #include <sys/param.h>
   31 #include <sys/systm.h>
   32 #include <sys/kdb.h>
   33 #include <sys/kernel.h>
   34 #include <sys/proc.h>
   35 #include <sys/signal.h>
   36 
   37 #include <machine/gdb_machdep.h>
   38 #include <machine/pcb.h>
   39 #include <machine/reg.h>
   40 
   41 #include <machine/hid.h>
   42 #include <machine/spr.h>
   43 
   44 #include <machine/trap.h>
   45 
   46 #include <gdb/gdb.h>
   47 #include <gdb/gdb_int.h>
   48 
   49 void *
   50 gdb_cpu_getreg(int regnum, size_t *regsz)
   51 {
   52 
   53         *regsz = gdb_cpu_regsz(regnum);
   54 
   55         if (kdb_thread == curthread) {
   56                 if (regnum == 0 || (regnum >= 2 && regnum <= 31))
   57                         return (kdb_frame->fixreg + regnum);
   58                 if (regnum == 64)
   59                         return (&kdb_frame->srr0);
   60                 if (regnum == 67)
   61                         return (&kdb_frame->lr);
   62         }
   63 
   64         if (regnum == 1)
   65                 return (&kdb_thrctx->pcb_sp);
   66         if (regnum >= 14 && regnum <= 31)
   67                 return (kdb_thrctx->pcb_context + (regnum - 14));
   68         if (regnum == 64)
   69                 return (&kdb_thrctx->pcb_lr);
   70 
   71         return (NULL);
   72 }
   73 
   74 void
   75 gdb_cpu_setreg(int regnum, void *val)
   76 {
   77 
   78         switch (regnum) {
   79         case GDB_REG_PC:
   80                 break;
   81         }
   82 }
   83 
   84 int
   85 gdb_cpu_signal(int vector, int dummy __unused)
   86 {
   87 #ifdef E500
   88         if (vector == EXC_DEBUG || vector == EXC_PGM)
   89                 return (SIGTRAP);
   90 #else
   91         if (vector == EXC_TRC || vector == EXC_RUNMODETRC)
   92                 return (SIGTRAP);
   93 #endif
   94 
   95         if (vector <= 255)
   96                 return (vector);
   97         else
   98                 return (SIGEMT);
   99 }

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