gdb/ppcobsd-nat.c

   1 /* Native-dependent code for OpenBSD/powerpc.
   2
   3    Copyright 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., 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 "ppcobsd-tdep.h"
  32
  33 /* OpenBSD/powerpc doesn't have PT_GETFPREGS/PT_SETFPREGS like
  34    NetBSD/powerpc and FreeBSD/powerpc.  */
  35
  36 /* Fetch register REGNUM from the inferior.  If REGNUM is -1, do this
  37    for all registers.  */
  38
  39 void
  40 fetch_inferior_registers (int regnum)
  41 {
  42   struct reg regs;
  43
  44   if (ptrace (PT_GETREGS, PIDGET (inferior_ptid),
  45               (PTRACE_ARG3_TYPE) &regs, 0) == -1)
  46     perror_with_name ("Couldn't get registers");
  47
  48   ppcobsd_supply_gregset (&ppcobsd_gregset, current_regcache, -1,
  49                           &regs, sizeof regs);
  50 }
  51
  52 /* Store register REGNUM back into the inferior.  If REGNUM is -1, do
  53    this for all registers.  */
  54
  55 void
  56 store_inferior_registers (int regnum)
  57 {
  58   struct reg regs;
  59
  60   if (ptrace (PT_GETREGS, PIDGET (inferior_ptid),
  61               (PTRACE_ARG3_TYPE) &regs, 0) == -1)
  62     perror_with_name ("Couldn't get registers");
  63
  64   ppcobsd_collect_gregset (&ppcobsd_gregset, current_regcache,
  65                            regnum, &regs, sizeof regs);
  66
  67   if (ptrace (PT_SETREGS, PIDGET (inferior_ptid),
  68               (PTRACE_ARG3_TYPE) &regs, 0) == -1)
  69     perror_with_name ("Couldn't write registers");
  70 }
  71 \f
  72
  73 /* Provide a prototype to silence -Wmissing-prototypes.  */
  74 void _initialize_ppcobsd_nat (void);
  75
  76 void
  77 _initialize_ppcobsd_nat (void)
  78 {
  79   /* General-purpose registers.  */
  80   ppcobsd_reg_offsets.r0_offset = offsetof (struct reg, gpr);
  81   ppcobsd_reg_offsets.pc_offset = offsetof (struct reg, pc);
  82   ppcobsd_reg_offsets.ps_offset = offsetof (struct reg, ps);
  83   ppcobsd_reg_offsets.cr_offset = offsetof (struct reg, cnd);
  84   ppcobsd_reg_offsets.lr_offset = offsetof (struct reg, lr);
  85   ppcobsd_reg_offsets.ctr_offset = offsetof (struct reg, cnt);
  86   ppcobsd_reg_offsets.xer_offset = offsetof (struct reg, xer);
  87   ppcobsd_reg_offsets.mq_offset = offsetof (struct reg, mq);
  88
  89   /* Floating-point registers.  */
  90   ppcobsd_reg_offsets.f0_offset = offsetof (struct reg, fpr);
  91   ppcobsd_reg_offsets.fpscr_offset = -1;
  92
  93   /* AltiVec registers.  */
  94   ppcobsd_reg_offsets.vr0_offset = offsetof (struct vreg, vreg);
  95   ppcobsd_reg_offsets.vscr_offset = offsetof (struct vreg, vscr);
  96   ppcobsd_reg_offsets.vrsave_offset = offsetof (struct vreg, vrsave);
  97 }