gdb/hppanbsd-nat.c

   1 /* Native-dependent code for NetBSD/hppa.
   2
   3    Copyright (C) 2008, 2009 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 "inferior.h"
  24 #include "regcache.h"
  25
  26 #include <sys/types.h>
  27 #include <sys/ptrace.h>
  28 #include <machine/reg.h>
  29
  30 #include "hppa-tdep.h"
  31 #include "inf-ptrace.h"
  32
  33 #include "nbsd-nat.h"
  34
  35 static int
  36 hppanbsd_gregset_supplies_p (int regnum)
  37 {
  38   return ((regnum >= HPPA_R0_REGNUM && regnum <= HPPA_R31_REGNUM) ||
  39           (regnum >= HPPA_SAR_REGNUM && regnum <= HPPA_PCSQ_TAIL_REGNUM) ||
  40           regnum == HPPA_IPSW_REGNUM ||
  41           (regnum >= HPPA_SR4_REGNUM && regnum <= HPPA_SR4_REGNUM + 5));
  42 }
  43
  44 static int
  45 hppanbsd_fpregset_supplies_p (int regnum)
  46 {
  47   return (regnum >= HPPA_FP0_REGNUM && regnum <= HPPA_FP31R_REGNUM);
  48 }
  49
  50 /* Supply the general-purpose registers stored in GREGS to REGCACHE.  */
  51
  52 static void
  53 hppanbsd_supply_gregset (struct regcache *regcache, const void *gregs)
  54 {
  55   const char *regs = gregs;
  56   const int *r = gregs;
  57   int regnum;
  58
  59   for (regnum = HPPA_R1_REGNUM; regnum <= HPPA_R31_REGNUM; regnum++)
  60     regcache_raw_supply (regcache, regnum, regs + regnum * 4);
  61
  62   regcache_raw_supply (regcache, HPPA_SAR_REGNUM, regs + 32 * 4);
  63   regcache_raw_supply (regcache, HPPA_PCSQ_HEAD_REGNUM, regs + 33 * 4);
  64   regcache_raw_supply (regcache, HPPA_PCSQ_TAIL_REGNUM, regs + 34 * 4);
  65   regcache_raw_supply (regcache, HPPA_PCOQ_HEAD_REGNUM, regs + 35 * 4);
  66   regcache_raw_supply (regcache, HPPA_PCOQ_TAIL_REGNUM, regs + 36 * 4);
  67   regcache_raw_supply (regcache, HPPA_IPSW_REGNUM, regs);
  68   regcache_raw_supply (regcache, HPPA_SR4_REGNUM, regs + 41 * 4);
  69   regcache_raw_supply (regcache, HPPA_SR4_REGNUM + 1, regs + 37 * 4);
  70   regcache_raw_supply (regcache, HPPA_SR4_REGNUM + 2, regs + 38 * 4);
  71   regcache_raw_supply (regcache, HPPA_SR4_REGNUM + 3, regs + 39 * 4);
  72   regcache_raw_supply (regcache, HPPA_SR4_REGNUM + 4, regs + 40 * 4);
  73 }
  74
  75 /* Supply the floating-point registers stored in FPREGS to REGCACHE.  */
  76
  77 static void
  78 hppanbsd_supply_fpregset (struct regcache *regcache, const void *fpregs)
  79 {
  80   const char *regs = fpregs;
  81   int regnum;
  82
  83   for (regnum = HPPA_FP0_REGNUM; regnum <= HPPA_FP31R_REGNUM;
  84        regnum += 2, regs += 8)
  85     {
  86       regcache_raw_supply (regcache, regnum, regs);
  87       regcache_raw_supply (regcache, regnum + 1, regs + 4);
  88     }
  89 }
  90
  91 /* Collect the general-purpose registers from REGCACHE and store them
  92    in GREGS.  */
  93
  94 static void
  95 hppanbsd_collect_gregset (const struct regcache *regcache,
  96                           void *gregs, int regnum)
  97 {
  98   char *regs = gregs;
  99   int *r = gregs;
 100   int i;
 101
 102   for (i = HPPA_R1_REGNUM; i <= HPPA_R31_REGNUM; i++)
 103     {
 104       if (regnum == -1 || regnum == i)
 105         regcache_raw_collect (regcache, i, regs + i * 4);
 106     }
 107
 108   if (regnum == -1 || regnum == HPPA_IPSW_REGNUM)
 109     regcache_raw_collect (regcache, HPPA_IPSW_REGNUM, regs);
 110   if (regnum == -1 || regnum == HPPA_PCOQ_HEAD_REGNUM)
 111     regcache_raw_collect (regcache, HPPA_PCOQ_HEAD_REGNUM, regs + 35 * 4);
 112   if (regnum == -1 || regnum == HPPA_PCOQ_TAIL_REGNUM)
 113     regcache_raw_collect (regcache, HPPA_PCOQ_TAIL_REGNUM, regs + 36 * 4);
 114
 115   if (regnum == -1 || regnum == HPPA_SAR_REGNUM)
 116     regcache_raw_collect (regcache, HPPA_SAR_REGNUM, regs + 32 * 4);
 117   if (regnum == -1 || regnum == HPPA_PCSQ_HEAD_REGNUM)
 118     regcache_raw_collect (regcache, HPPA_PCSQ_HEAD_REGNUM, regs + 33 * 4);
 119   if (regnum == -1 || regnum == HPPA_PCSQ_TAIL_REGNUM)
 120     regcache_raw_collect (regcache, HPPA_PCSQ_TAIL_REGNUM, regs + 34 * 4);
 121   if (regnum == -1 || regnum == HPPA_PCOQ_HEAD_REGNUM)
 122     regcache_raw_collect (regcache, HPPA_PCOQ_HEAD_REGNUM, regs + 35 * 4);
 123   if (regnum == -1 || regnum == HPPA_PCOQ_TAIL_REGNUM)
 124     regcache_raw_collect (regcache, HPPA_PCOQ_TAIL_REGNUM, regs + 36 * 4);
 125   if (regnum == -1 || regnum == HPPA_IPSW_REGNUM)
 126     regcache_raw_collect (regcache, HPPA_IPSW_REGNUM, regs);
 127   if (regnum == -1 || regnum == HPPA_SR4_REGNUM)
 128     regcache_raw_collect (regcache, HPPA_SR4_REGNUM, regs + 41 * 4);
 129   if (regnum == -1 || regnum == HPPA_SR4_REGNUM + 1)
 130     regcache_raw_collect (regcache, HPPA_SR4_REGNUM + 1, regs + 37 * 4);
 131   if (regnum == -1 || regnum == HPPA_SR4_REGNUM + 2)
 132     regcache_raw_collect (regcache, HPPA_SR4_REGNUM + 2, regs + 38 * 4);
 133   if (regnum == -1 || regnum == HPPA_SR4_REGNUM + 3)
 134     regcache_raw_collect (regcache, HPPA_SR4_REGNUM + 3, regs + 39 * 4);
 135   if (regnum == -1 || regnum == HPPA_SR4_REGNUM + 4)
 136     regcache_raw_collect (regcache, HPPA_SR4_REGNUM + 4, regs + 40 * 4);
 137 }
 138
 139 /* Collect the floating-point registers from REGCACHE and store them
 140    in FPREGS.  */
 141
 142 static void
 143 hppanbsd_collect_fpregset (struct regcache *regcache,
 144                           void *fpregs, int regnum)
 145 {
 146   char *regs = fpregs;
 147   int i;
 148
 149   for (i = HPPA_FP0_REGNUM; i <= HPPA_FP31R_REGNUM; i += 2, regs += 8)
 150     {
 151       if (regnum == -1 || regnum == i || regnum == i + 1)
 152         {
 153           regcache_raw_collect (regcache, i, regs);
 154           regcache_raw_collect (regcache, i + 1, regs + 4);
 155         }
 156     }
 157 }
 158 \f
 159
 160 /* Fetch register REGNUM from the inferior.  If REGNUM is -1, do this
 161    for all registers (including the floating-point registers).  */
 162
 163 static void
 164 hppanbsd_fetch_registers (struct target_ops *ops,
 165                           struct regcache *regcache, int regnum)
 166
 167 {
 168   if (regnum == -1 || hppanbsd_gregset_supplies_p (regnum))
 169     {
 170       struct reg regs;
 171
 172       if (ptrace (PT_GETREGS, PIDGET (inferior_ptid),
 173                   (PTRACE_TYPE_ARG3) &regs, 0) == -1)
 174         perror_with_name (_("Couldn't get registers"));
 175
 176       hppanbsd_supply_gregset (regcache, &regs);
 177     }
 178
 179   if (regnum == -1 || hppanbsd_fpregset_supplies_p (regnum))
 180     {
 181       struct fpreg fpregs;
 182
 183       if (ptrace (PT_GETFPREGS, PIDGET (inferior_ptid),
 184                   (PTRACE_TYPE_ARG3) &fpregs, 0) == -1)
 185         perror_with_name (_("Couldn't get floating point status"));
 186
 187       hppanbsd_supply_fpregset (regcache, &fpregs);
 188     }
 189 }
 190
 191 /* Store register REGNUM back into the inferior.  If REGNUM is -1, do
 192    this for all registers (including the floating-point registers).  */
 193
 194 static void
 195 hppanbsd_store_registers (struct target_ops *ops,
 196                           struct regcache *regcache, int regnum)
 197 {
 198   if (regnum == -1 || hppanbsd_gregset_supplies_p (regnum))
 199     {
 200       struct reg regs;
 201
 202       if (ptrace (PT_GETREGS, PIDGET (inferior_ptid),
 203                   (PTRACE_TYPE_ARG3) &regs, 0) == -1)
 204         perror_with_name (_("Couldn't get registers"));
 205
 206       hppanbsd_collect_gregset (regcache, &regs, regnum);
 207
 208       if (ptrace (PT_SETREGS, PIDGET (inferior_ptid),
 209                   (PTRACE_TYPE_ARG3) &regs, 0) == -1)
 210         perror_with_name (_("Couldn't write registers"));
 211     }
 212
 213   if (regnum == -1 || hppanbsd_fpregset_supplies_p (regnum))
 214     {
 215       struct fpreg fpregs;
 216
 217       if (ptrace (PT_GETFPREGS, PIDGET (inferior_ptid),
 218                   (PTRACE_TYPE_ARG3) &fpregs, 0) == -1)
 219         perror_with_name (_("Couldn't get floating point status"));
 220
 221       hppanbsd_collect_fpregset (regcache, &fpregs, regnum);
 222
 223       if (ptrace (PT_SETFPREGS, PIDGET (inferior_ptid),
 224                   (PTRACE_TYPE_ARG3) &fpregs, 0) == -1)
 225         perror_with_name (_("Couldn't write floating point status"));
 226     }
 227 }
 228
 229
 230 /* Provide a prototype to silence -Wmissing-prototypes.  */
 231 void _initialize_hppanbsd_nat (void);
 232
 233 void
 234 _initialize_hppanbsd_nat (void)
 235 {
 236   struct target_ops *t;
 237
 238   /* Add some extra features to the ptrace target.  */
 239   t = inf_ptrace_target ();
 240
 241   t->to_fetch_registers = hppanbsd_fetch_registers;
 242   t->to_store_registers = hppanbsd_store_registers;
 243
 244   t->to_pid_to_exec_file = nbsd_pid_to_exec_file;
 245
 246   add_target (t);
 247 }