gdb/sparcnbsd-nat.c

   1 /* Native-dependent code for NetBSD/sparc.
   2
   3    Copyright (C) 2002, 2003, 2004, 2007 Free Software Foundation, Inc.
   4
   5    This file is part of GDB.
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 2 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program; if not, write to the Free Software
  19    Foundation, Inc., 51 Franklin Street, Fifth Floor,
  20    Boston, MA 02110-1301, USA.  */
  21
  22 #include "defs.h"
  23 #include "regcache.h"
  24 #include "target.h"
  25
  26 #include "sparc-tdep.h"
  27 #include "sparc-nat.h"
  28
  29 /* Support for debugging kernel virtual memory images.  */
  30
  31 #include <sys/types.h>
  32 #include <machine/pcb.h>
  33
  34 #include "bsd-kvm.h"
  35
  36 static int
  37 sparc32nbsd_supply_pcb (struct regcache *regcache, struct pcb *pcb)
  38 {
  39   /* The following is true for NetBSD 1.6.2:
  40
  41      The pcb contains %sp, %pc, %psr and %wim.  From this information
  42      we reconstruct the register state as it would look when we just
  43      returned from cpu_switch().  */
  44
  45   /* The stack pointer shouldn't be zero.  */
  46   if (pcb->pcb_sp == 0)
  47     return 0;
  48
  49   regcache_raw_supply (regcache, SPARC_SP_REGNUM, &pcb->pcb_sp);
  50   regcache_raw_supply (regcache, SPARC_O7_REGNUM, &pcb->pcb_pc);
  51   regcache_raw_supply (regcache, SPARC32_PSR_REGNUM, &pcb->pcb_psr);
  52   regcache_raw_supply (regcache, SPARC32_WIM_REGNUM, &pcb->pcb_wim);
  53   regcache_raw_supply (regcache, SPARC32_PC_REGNUM, &pcb->pcb_pc);
  54
  55   sparc_supply_rwindow (regcache, pcb->pcb_sp, -1);
  56
  57   return 1;
  58 }
  59 \f
  60
  61 /* Provide a prototype to silence -Wmissing-prototypes.  */
  62 void _initialize_sparcnbsd_nat (void);
  63
  64 void
  65 _initialize_sparcnbsd_nat (void)
  66 {
  67   sparc_gregset = &sparc32nbsd_gregset;
  68
  69   /* We've got nothing to add to the generic SPARC target.  */
  70   add_target (sparc_target ());
  71
  72   /* Support debugging kernel virtual memory images.  */
  73   bsd_kvm_add_target (sparc32nbsd_supply_pcb);
  74 }