gdb/ppcobsd-nat.c

   1 /* Native-dependent code for OpenBSD/powerpc.
   2
   3    Copyright 2004, 2005 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., 59 Temple Place - Suite 330,
  20    Boston, MA 02111-1307, USA.  */
  21
  22 #include "defs.h"
  23 #include "inferior.h"
  24 #include "regcache.h"
  25
  26 #include <stddef.h>
  27 #include <sys/types.h>
  28 #include <sys/ptrace.h>
  29 #include <machine/reg.h>
  30
  31 #include "ppc-tdep.h"
  32 #include "ppcobsd-tdep.h"
  33 #include "inf-ptrace.h"
  34
  35 /* OpenBSD/powerpc doesn't have PT_GETFPREGS/PT_SETFPREGS like
  36    NetBSD/powerpc and FreeBSD/powerpc.  */
  37
  38 /* Fetch register REGNUM from the inferior.  If REGNUM is -1, do this
  39    for all registers.  */
  40
  41 static void
  42 ppcobsd_fetch_registers (int regnum)
  43 {
  44   struct reg regs;
  45
  46   if (ptrace (PT_GETREGS, PIDGET (inferior_ptid),
  47               (PTRACE_TYPE_ARG3) &regs, 0) == -1)
  48     perror_with_name (_("Couldn't get registers"));
  49
  50   ppcobsd_supply_gregset (&ppcobsd_gregset, current_regcache, -1,
  51                           &regs, sizeof regs);
  52 }
  53
  54 /* Store register REGNUM back into the inferior.  If REGNUM is -1, do
  55    this for all registers.  */
  56
  57 static void
  58 ppcobsd_store_registers (int regnum)
  59 {
  60   struct reg regs;
  61
  62   if (ptrace (PT_GETREGS, PIDGET (inferior_ptid),
  63               (PTRACE_TYPE_ARG3) &regs, 0) == -1)
  64     perror_with_name (_("Couldn't get registers"));
  65
  66   ppcobsd_collect_gregset (&ppcobsd_gregset, current_regcache,
  67                            regnum, &regs, sizeof regs);
  68
  69   if (ptrace (PT_SETREGS, PIDGET (inferior_ptid),
  70               (PTRACE_TYPE_ARG3) &regs, 0) == -1)
  71     perror_with_name (_("Couldn't write registers"));
  72 }
  73 \f
  74
  75 /* Provide a prototype to silence -Wmissing-prototypes.  */
  76 void _initialize_ppcobsd_nat (void);
  77
  78 void
  79 _initialize_ppcobsd_nat (void)
  80 {
  81   struct target_ops *t;
  82
  83   /* Add in local overrides.  */
  84   t = inf_ptrace_target ();
  85   t->to_fetch_registers = ppcobsd_fetch_registers;
  86   t->to_store_registers = ppcobsd_store_registers;
  87   add_target (t);
  88
  89   /* General-purpose registers.  */
  90   ppcobsd_reg_offsets.r0_offset = offsetof (struct reg, gpr);
  91   ppcobsd_reg_offsets.pc_offset = offsetof (struct reg, pc);
  92   ppcobsd_reg_offsets.ps_offset = offsetof (struct reg, ps);
  93   ppcobsd_reg_offsets.cr_offset = offsetof (struct reg, cnd);
  94   ppcobsd_reg_offsets.lr_offset = offsetof (struct reg, lr);
  95   ppcobsd_reg_offsets.ctr_offset = offsetof (struct reg, cnt);
  96   ppcobsd_reg_offsets.xer_offset = offsetof (struct reg, xer);
  97   ppcobsd_reg_offsets.mq_offset = offsetof (struct reg, mq);
  98
  99   /* Floating-point registers.  */
 100   ppcobsd_reg_offsets.f0_offset = offsetof (struct reg, fpr);
 101   ppcobsd_reg_offsets.fpscr_offset = -1;
 102
 103   /* AltiVec registers.  */
 104   ppcobsd_reg_offsets.vr0_offset = offsetof (struct vreg, vreg);
 105   ppcobsd_reg_offsets.vscr_offset = offsetof (struct vreg, vscr);
 106   ppcobsd_reg_offsets.vrsave_offset = offsetof (struct vreg, vrsave);
 107 }