sys/arch/powerpc/oea/kgdb_glue.c

   1 /*      $NetBSD: kgdb_glue.c,v 1.2 2007/10/17 19:56:43 garbled Exp $    */
   2
   3 /*
   4  * Copyright (C) 1995, 1996 Wolfgang Solfrank.
   5  * Copyright (C) 1995, 1996 TooLs GmbH.
   6  * All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  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  * 3. All advertising materials mentioning features or use of this software
  17  *    must display the following acknowledgement:
  18  *      This product includes software developed by TooLs GmbH.
  19  * 4. The name of TooLs GmbH may not be used to endorse or promote products
  20  *    derived from this software without specific prior written permission.
  21  *
  22  * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR
  23  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  24  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  25  * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  26  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  27  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
  28  * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
  29  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
  30  * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
  31  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  32  */
  33
  34 #include <sys/cdefs.h>
  35 __KERNEL_RCSID(0, "$NetBSD: kgdb_glue.c,v 1.2 2007/10/17 19:56:43 garbled Exp $");
  36
  37 #include <sys/param.h>
  38
  39 #include <kgdb/kgdb.h>
  40
  41 #include <machine/frame.h>
  42 #include <machine/kgdb.h>
  43 #include <machine/pcb.h>
  44 #include <machine/psl.h>
  45 #include <machine/trap.h>
  46
  47 int kgdbregs[NREG];
  48
  49 #ifdef  KGDBUSERHACK
  50 int kgdbsr;     /* TEMPRORARY (Really needs some better mechanism)      XXX */
  51 int savesr;
  52 #endif
  53
  54 void
  55 kgdbinit(void)
  56 {
  57 }
  58
  59 int
  60 kgdb_poll(void)
  61 {
  62         /* for now: */
  63         return 0;
  64 }
  65
  66 int
  67 kgdb_trap_glue(struct trapframe *frame)
  68 {
  69         if (!(frame->srr1 & PSL_PR)
  70             && (frame->exc == EXC_TRC
  71                 || (frame->exc == EXC_PGM
  72                     && (frame->srr1 & 0x20000))
  73                 || frame->exc == EXC_BPT)) {
  74 #ifdef  KGDBUSERHACK
  75                 __asm ("mfsr %0,%1" : "=r"(savesr) : "K"(USER_SR)); /* see above                XXX */
  76 #endif
  77                 kgdbcopy(frame, kgdbregs, sizeof kgdbregs);
  78                 kgdbregs[MSR] &= ~PSL_BE;
  79
  80                 switch (kgdbcmds()) {
  81                 case 2:
  82                 case 0:
  83                         kgdbregs[MSR] &= ~PSL_SE;
  84                         break;
  85                 case 1:
  86                         kgdbregs[MSR] |= PSL_SE;
  87                         break;
  88                 }
  89                 kgdbcopy(kgdbregs, frame, sizeof kgdbregs);
  90 #ifdef  KGDBUSERHACK
  91                 __asm ("mtsr %0,%1; isync" :: "K"(USER_SR), "r"(savesr));
  92 #endif
  93                 return 1;
  94         }
  95         return 0;
  96 }