gdb/alphabsd-nat.c

   1 /* Native-dependent code for Alpha BSD's.
   2    Copyright 2000, 2001, 2002 Free Software Foundation, Inc.
   3
   4    This file is part of GDB.
   5
   6    This program is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 2 of the License, or
   9    (at your option) any later version.
  10
  11    This program is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with this program; if not, write to the Free Software
  18    Foundation, Inc., 59 Temple Place - Suite 330,
  19    Boston, MA 02111-1307, USA.  */
  20
  21 #include "defs.h"
  22 #include "inferior.h"
  23 #include "regcache.h"
  24
  25 #include "alpha-tdep.h"
  26 #include "alphabsd-tdep.h"
  27
  28 #include <sys/types.h>
  29 #include <sys/ptrace.h>
  30 #include <machine/reg.h>
  31
  32 #ifdef HAVE_SYS_PROCFS_H
  33 #include <sys/procfs.h>
  34 #endif
  35
  36 #ifndef HAVE_GREGSET_T
  37 typedef struct reg gregset_t;
  38 #endif
  39
  40 #ifndef HAVE_FPREGSET_T
  41 typedef struct fpreg fpregset_t;
  42 #endif
  43
  44 #include "gregset.h"
  45
  46 /* Provide *regset() wrappers around the generic Alpha BSD register
  47    supply/fill routines.  */
  48
  49 void
  50 supply_gregset (gregset_t *gregsetp)
  51 {
  52   alphabsd_supply_reg ((char *) gregsetp, -1);
  53 }
  54
  55 void
  56 fill_gregset (gregset_t *gregsetp, int regno)
  57 {
  58   alphabsd_fill_reg ((char *) gregsetp, regno);
  59 }
  60
  61 void
  62 supply_fpregset (fpregset_t *fpregsetp)
  63 {
  64   alphabsd_supply_fpreg ((char *) fpregsetp, -1);
  65 }
  66
  67 void
  68 fill_fpregset (fpregset_t *fpregsetp, int regno)
  69 {
  70   alphabsd_fill_fpreg ((char *) fpregsetp, regno);
  71 }
  72 \f
  73 /* Determine if PT_GETREGS fetches this register.  */
  74
  75 static int
  76 getregs_supplies (int regno)
  77 {
  78
  79   return ((regno >= ALPHA_V0_REGNUM && regno <= ALPHA_ZERO_REGNUM)
  80           || regno >= PC_REGNUM);
  81 }
  82
  83
  84 /* Fetch register REGNO from the inferior.  If REGNO is -1, do this
  85    for all registers (including the floating point registers).  */
  86
  87 void
  88 fetch_inferior_registers (int regno)
  89 {
  90
  91   if (regno == -1 || getregs_supplies (regno))
  92     {
  93       struct reg gregs;
  94
  95       if (ptrace (PT_GETREGS, PIDGET (inferior_ptid),
  96                   (PTRACE_ARG3_TYPE) &gregs, 0) == -1)
  97         perror_with_name ("Couldn't get registers");
  98
  99       alphabsd_supply_reg ((char *) &gregs, regno);
 100       if (regno != -1)
 101         return;
 102     }
 103
 104   if (regno == -1 || regno >= FP0_REGNUM)
 105     {
 106       struct fpreg fpregs;
 107
 108       if (ptrace (PT_GETFPREGS, PIDGET (inferior_ptid),
 109                   (PTRACE_ARG3_TYPE) &fpregs, 0) == -1)
 110         perror_with_name ("Couldn't get floating point status");
 111
 112       alphabsd_supply_fpreg ((char *) &fpregs, regno);
 113     }
 114
 115   /* Reset virtual frame pointer.  */
 116   supply_register (FP_REGNUM, NULL);
 117 }
 118
 119 /* Store register REGNO back into the inferior.  If REGNO is -1, do
 120    this for all registers (including the floating point registers).  */
 121
 122 void
 123 store_inferior_registers (int regno)
 124 {
 125
 126   if (regno == -1 || getregs_supplies (regno))
 127     {
 128       struct reg gregs;
 129       if (ptrace (PT_GETREGS, PIDGET (inferior_ptid),
 130                   (PTRACE_ARG3_TYPE) &gregs, 0) == -1)
 131         perror_with_name ("Couldn't get registers");
 132
 133       alphabsd_fill_reg ((char *) &gregs, regno);
 134
 135       if (ptrace (PT_SETREGS, PIDGET (inferior_ptid),
 136                   (PTRACE_ARG3_TYPE) &gregs, 0) == -1)
 137         perror_with_name ("Couldn't write registers");
 138
 139       if (regno != -1)
 140         return;
 141     }
 142
 143   if (regno == -1 || regno >= FP0_REGNUM)
 144     {
 145       struct fpreg fpregs;
 146
 147       if (ptrace (PT_GETFPREGS, PIDGET (inferior_ptid),
 148                   (PTRACE_ARG3_TYPE) &fpregs, 0) == -1)
 149         perror_with_name ("Couldn't get floating point status");
 150
 151       alphabsd_fill_fpreg ((char *) &fpregs, regno);
 152
 153       if (ptrace (PT_SETFPREGS, PIDGET (inferior_ptid),
 154                   (PTRACE_ARG3_TYPE) &fpregs, 0) == -1)
 155         perror_with_name ("Couldn't write floating point status");
 156     }
 157 }