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/amd64/amd64/gdb_machdep.c

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    1 /*
    2  * Copyright (c) 2004 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/5.3/sys/amd64/amd64/gdb_machdep.c 131899 2004-07-10 17:47:22Z 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/frame.h>
   38 #include <machine/gdb_machdep.h>
   39 #include <machine/psl.h>
   40 #include <machine/reg.h>
   41 #include <machine/trap.h>
   42 
   43 #include <gdb/gdb.h>
   44 
   45 void *
   46 gdb_cpu_getreg(int regnum, size_t *regsz)
   47 {
   48         struct trapframe *tf = kdb_frame;
   49 
   50         *regsz = gdb_cpu_regsz(regnum);
   51         switch (regnum) {
   52         case 0:  return (&tf->tf_rax);
   53         case 1:  return (&tf->tf_rbx);
   54         case 2:  return (&tf->tf_rcx);
   55         case 3:  return (&tf->tf_rdx);
   56         case 4:  return (&tf->tf_rsi);
   57         case 5:  return (&tf->tf_rdi);
   58         case 6:  return (&tf->tf_rbp);
   59         case 7:  return (&tf->tf_rsp);
   60         case 8:  return (&tf->tf_r8);
   61         case 9:  return (&tf->tf_r9);
   62         case 10: return (&tf->tf_r10);
   63         case 11: return (&tf->tf_r11);
   64         case 12: return (&tf->tf_r12);
   65         case 13: return (&tf->tf_r13);
   66         case 14: return (&tf->tf_r14);
   67         case 15: return (&tf->tf_r15);
   68         case 16: return (&tf->tf_rip);
   69         case 17: return (&tf->tf_rflags);
   70         case 18: return (&tf->tf_cs);
   71         case 19: return (&tf->tf_ss);
   72         }
   73         return (NULL);
   74 }
   75 
   76 void
   77 gdb_cpu_setreg(int regnum, register_t val)
   78 {
   79         struct trapframe *tf = kdb_frame;
   80 
   81         switch (regnum) {
   82         case GDB_REG_PC: tf->tf_rip = val; break;
   83         }
   84 }

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