gdb/sparcnbsd-nat.c

   1 /* Native-dependent code for NetBSD/sparc.
   2
   3    Copyright (C) 2002, 2003, 2004, 2007, 2008, 2009
   4    Free Software Foundation, Inc.
   5
   6    This file is part of GDB.
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 3 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  20
  21 #include "defs.h"
  22 #include "regcache.h"
  23 #include "target.h"
  24
  25 #include "sparc-tdep.h"
  26 #include "sparc-nat.h"
  27
  28 /* Support for debugging kernel virtual memory images.  */
  29
  30 #include <sys/types.h>
  31 #include <machine/pcb.h>
  32
  33 #include "bsd-kvm.h"
  34
  35 static int
  36 sparc32nbsd_supply_pcb (struct regcache *regcache, struct pcb *pcb)
  37 {
  38   /* The following is true for NetBSD 1.6.2:
  39
  40      The pcb contains %sp, %pc, %psr and %wim.  From this information
  41      we reconstruct the register state as it would look when we just
  42      returned from cpu_switch().  */
  43
  44   /* The stack pointer shouldn't be zero.  */
  45   if (pcb->pcb_sp == 0)
  46     return 0;
  47
  48   regcache_raw_supply (regcache, SPARC_SP_REGNUM, &pcb->pcb_sp);
  49   regcache_raw_supply (regcache, SPARC_O7_REGNUM, &pcb->pcb_pc);
  50   regcache_raw_supply (regcache, SPARC32_PSR_REGNUM, &pcb->pcb_psr);
  51   regcache_raw_supply (regcache, SPARC32_WIM_REGNUM, &pcb->pcb_wim);
  52   regcache_raw_supply (regcache, SPARC32_PC_REGNUM, &pcb->pcb_pc);
  53
  54   sparc_supply_rwindow (regcache, pcb->pcb_sp, -1);
  55
  56   return 1;
  57 }
  58 \f
  59
  60 /* Provide a prototype to silence -Wmissing-prototypes.  */
  61 void _initialize_sparcnbsd_nat (void);
  62
  63 void
  64 _initialize_sparcnbsd_nat (void)
  65 {
  66   sparc_gregset = &sparc32nbsd_gregset;
  67
  68   /* We've got nothing to add to the generic SPARC target.  */
  69   add_target (sparc_target ());
  70
  71   /* Support debugging kernel virtual memory images.  */
  72   bsd_kvm_add_target (sparc32nbsd_supply_pcb);
  73 }