gnu/dist/gdb6/gdb/sparc64nbsd-nat.c

   1 /* Native-dependent code for NetBSD/sparc64.
   2
   3    Copyright (C) 2003, 2004 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 "nbsd-nat.h"
  27 #include "sparc64-tdep.h"
  28 #include "sparc-nat.h"
  29
  30 #include "nbsd-nat.h"
  31
  32 /* NetBSD is different from the other OSes that support both SPARC and
  33    UltraSPARC in that the result of ptrace(2) depends on whether the
  34    traced process is 32-bit or 64-bit.  */
  35
  36 static void
  37 sparc64nbsd_supply_gregset (const struct sparc_gregset *gregset,
  38                             struct regcache *regcache,
  39                             int regnum, const void *gregs)
  40 {
  41   int sparc32 = (gdbarch_ptr_bit (current_gdbarch) == 32);
  42
  43   if (sparc32)
  44     sparc32_supply_gregset (&sparc32nbsd_gregset, regcache, regnum, gregs);
  45   else
  46     sparc64_supply_gregset (&sparc64nbsd_gregset, regcache, regnum, gregs);
  47 }
  48
  49 static void
  50 sparc64nbsd_collect_gregset (const struct sparc_gregset *gregset,
  51                              const struct regcache *regcache,
  52                              int regnum, void *gregs)
  53 {
  54   int sparc32 = (gdbarch_ptr_bit (current_gdbarch) == 32);
  55
  56   if (sparc32)
  57     sparc32_collect_gregset (&sparc32nbsd_gregset, regcache, regnum, gregs);
  58   else
  59     sparc64_collect_gregset (&sparc64nbsd_gregset, regcache, regnum, gregs);
  60 }
  61
  62 static void
  63 sparc64nbsd_supply_fpregset (struct regcache *regcache,
  64                              int regnum, const void *fpregs)
  65 {
  66   int sparc32 = (gdbarch_ptr_bit (current_gdbarch) == 32);
  67
  68   if (sparc32)
  69     sparc32_supply_fpregset (regcache, regnum, fpregs);
  70   else
  71     sparc64_supply_fpregset (regcache, regnum, fpregs);
  72 }
  73
  74 static void
  75 sparc64nbsd_collect_fpregset (const struct regcache *regcache,
  76                               int regnum, void *fpregs)
  77 {
  78   int sparc32 = (gdbarch_ptr_bit (current_gdbarch) == 32);
  79
  80   if (sparc32)
  81     sparc32_collect_fpregset (regcache, regnum, fpregs);
  82   else
  83     sparc64_collect_fpregset (regcache, regnum, fpregs);
  84 }
  85
  86 /* Determine whether `gregset_t' contains register REGNUM.  */
  87
  88 static int
  89 sparc64nbsd_gregset_supplies_p (int regnum)
  90 {
  91   if (gdbarch_ptr_bit (current_gdbarch) == 32)
  92     return sparc32_gregset_supplies_p (regnum);
  93
  94   /* Integer registers.  */
  95   if ((regnum >= SPARC_G1_REGNUM && regnum <= SPARC_G7_REGNUM)
  96       || (regnum >= SPARC_O0_REGNUM && regnum <= SPARC_O7_REGNUM)
  97       || (regnum >= SPARC_L0_REGNUM && regnum <= SPARC_L7_REGNUM)
  98       || (regnum >= SPARC_I0_REGNUM && regnum <= SPARC_I7_REGNUM))
  99     return 1;
 100
 101   /* Control registers.  */
 102   if (regnum == SPARC64_PC_REGNUM
 103       || regnum == SPARC64_NPC_REGNUM
 104       || regnum == SPARC64_STATE_REGNUM
 105       || regnum == SPARC64_Y_REGNUM)
 106     return 1;
 107
 108   return 0;
 109 }
 110
 111 /* Determine whether `fpregset_t' contains register REGNUM.  */
 112
 113 static int
 114 sparc64nbsd_fpregset_supplies_p (int regnum)
 115 {
 116   if (gdbarch_ptr_bit (current_gdbarch) == 32)
 117     return sparc32_fpregset_supplies_p (regnum);
 118
 119   /* Floating-point registers.  */
 120   if ((regnum >= SPARC_F0_REGNUM && regnum <= SPARC_F31_REGNUM)
 121       || (regnum >= SPARC64_F32_REGNUM && regnum <= SPARC64_F62_REGNUM))
 122     return 1;
 123
 124   /* Control registers.  */
 125   if (regnum == SPARC64_FSR_REGNUM)
 126     return 1;
 127
 128   return 0;
 129 }
 130 \f
 131
 132 /* Support for debugging kernel virtual memory images.  */
 133
 134 #include <sys/types.h>
 135 #include <machine/pcb.h>
 136
 137 #include "bsd-kvm.h"
 138
 139 static int
 140 sparc64nbsd_supply_pcb (struct regcache *regcache, struct pcb *pcb)
 141 {
 142   int regnum;
 143
 144   /* The following is true for NetBSD 1.6.2:
 145
 146      The pcb contains %sp and %pc, %psr and %wim.  From this information
 147      we reconstruct the register state as it would look when we just
 148      returned from cpu_switch().  */
 149
 150   /* The stack pointer shouldn't be zero.  */
 151   if (pcb->pcb_sp == 0)
 152     return 0;
 153
 154   regcache_raw_supply (regcache, SPARC_SP_REGNUM, &pcb->pcb_sp);
 155   regcache_raw_supply (regcache, SPARC64_PC_REGNUM, &pcb->pcb_pc);
 156
 157   sparc_supply_rwindow (regcache, pcb->pcb_sp, -1);
 158
 159   return 1;
 160 }
 161
 162 \f
 163 /* Provide a prototype to silence -Wmissing-prototypes.  */
 164 void _initialize_sparc64nbsd_nat (void);
 165
 166 void
 167 _initialize_sparc64nbsd_nat (void)
 168 {
 169   struct target_ops *t;
 170
 171   sparc_supply_gregset = sparc64nbsd_supply_gregset;
 172   sparc_collect_gregset = sparc64nbsd_collect_gregset;
 173   sparc_supply_fpregset = sparc64nbsd_supply_fpregset;
 174   sparc_collect_fpregset = sparc64nbsd_collect_fpregset;
 175   sparc_gregset_supplies_p = sparc64nbsd_gregset_supplies_p;
 176   sparc_fpregset_supplies_p = sparc64nbsd_fpregset_supplies_p;
 177
 178   /* Add some extra features to the generic SPARC target.  */
 179   t = sparc_target ();
 180   t->to_pid_to_exec_file = nbsd_pid_to_exec_file;
 181   add_target (t);
 182
 183   /* Support debugging kernel virtual memory images.  */
 184   bsd_kvm_add_target (sparc64nbsd_supply_pcb);
 185 }