gdb/hppa-nbsd-nat.c

   1 /* Native-dependent code for NetBSD/hppa.
   2
   3    Copyright (C) 2008-2017 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 3 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, see <http://www.gnu.org/licenses/>.  */
  19
  20 #include "defs.h"
  21 #include "inferior.h"
  22 #include "regcache.h"
  23
  24 #include <sys/types.h>
  25 #include <sys/ptrace.h>
  26 #include <machine/reg.h>
  27
  28 #include "hppa-tdep.h"
  29 #include "inf-ptrace.h"
  30
  31 #include "nbsd-nat.h"
  32
  33 static int
  34 hppanbsd_gregset_supplies_p (int regnum)
  35 {
  36   return ((regnum >= HPPA_R0_REGNUM && regnum <= HPPA_R31_REGNUM) ||
  37           (regnum >= HPPA_SAR_REGNUM && regnum <= HPPA_PCSQ_TAIL_REGNUM) ||
  38           regnum == HPPA_IPSW_REGNUM ||
  39           (regnum >= HPPA_SR4_REGNUM && regnum <= HPPA_SR4_REGNUM + 5));
  40 }
  41
  42 static int
  43 hppanbsd_fpregset_supplies_p (int regnum)
  44 {
  45   return (regnum >= HPPA_FP0_REGNUM && regnum <= HPPA_FP31R_REGNUM);
  46 }
  47
  48 /* Supply the general-purpose registers stored in GREGS to REGCACHE.  */
  49
  50 static void
  51 hppanbsd_supply_gregset (struct regcache *regcache, const void *gregs)
  52 {
  53   const char *regs = gregs;
  54   const int *r = gregs;
  55   int regnum;
  56
  57   for (regnum = HPPA_R1_REGNUM; regnum <= HPPA_R31_REGNUM; regnum++)
  58     regcache_raw_supply (regcache, regnum, regs + regnum * 4);
  59
  60   regcache_raw_supply (regcache, HPPA_SAR_REGNUM, regs + 32 * 4);
  61   regcache_raw_supply (regcache, HPPA_PCSQ_HEAD_REGNUM, regs + 33 * 4);
  62   regcache_raw_supply (regcache, HPPA_PCSQ_TAIL_REGNUM, regs + 34 * 4);
  63   regcache_raw_supply (regcache, HPPA_PCOQ_HEAD_REGNUM, regs + 35 * 4);
  64   regcache_raw_supply (regcache, HPPA_PCOQ_TAIL_REGNUM, regs + 36 * 4);
  65   regcache_raw_supply (regcache, HPPA_IPSW_REGNUM, regs);
  66   regcache_raw_supply (regcache, HPPA_SR4_REGNUM, regs + 41 * 4);
  67   regcache_raw_supply (regcache, HPPA_SR4_REGNUM + 1, regs + 37 * 4);
  68   regcache_raw_supply (regcache, HPPA_SR4_REGNUM + 2, regs + 38 * 4);
  69   regcache_raw_supply (regcache, HPPA_SR4_REGNUM + 3, regs + 39 * 4);
  70   regcache_raw_supply (regcache, HPPA_SR4_REGNUM + 4, regs + 40 * 4);
  71 }
  72
  73 /* Supply the floating-point registers stored in FPREGS to REGCACHE.  */
  74
  75 static void
  76 hppanbsd_supply_fpregset (struct regcache *regcache, const void *fpregs)
  77 {
  78   const char *regs = fpregs;
  79   int regnum;
  80
  81   for (regnum = HPPA_FP0_REGNUM; regnum <= HPPA_FP31R_REGNUM;
  82        regnum += 2, regs += 8)
  83     {
  84       regcache_raw_supply (regcache, regnum, regs);
  85       regcache_raw_supply (regcache, regnum + 1, regs + 4);
  86     }
  87 }
  88
  89 /* Collect the general-purpose registers from REGCACHE and store them
  90    in GREGS.  */
  91
  92 static void
  93 hppanbsd_collect_gregset (const struct regcache *regcache,
  94                           void *gregs, int regnum)
  95 {
  96   char *regs = gregs;
  97   int *r = gregs;
  98   int i;
  99
 100   for (i = HPPA_R1_REGNUM; i <= HPPA_R31_REGNUM; i++)
 101     {
 102       if (regnum == -1 || regnum == i)
 103         regcache_raw_collect (regcache, i, regs + i * 4);
 104     }
 105
 106   if (regnum == -1 || regnum == HPPA_IPSW_REGNUM)
 107     regcache_raw_collect (regcache, HPPA_IPSW_REGNUM, regs);
 108   if (regnum == -1 || regnum == HPPA_PCOQ_HEAD_REGNUM)
 109     regcache_raw_collect (regcache, HPPA_PCOQ_HEAD_REGNUM, regs + 35 * 4);
 110   if (regnum == -1 || regnum == HPPA_PCOQ_TAIL_REGNUM)
 111     regcache_raw_collect (regcache, HPPA_PCOQ_TAIL_REGNUM, regs + 36 * 4);
 112
 113   if (regnum == -1 || regnum == HPPA_SAR_REGNUM)
 114     regcache_raw_collect (regcache, HPPA_SAR_REGNUM, regs + 32 * 4);
 115   if (regnum == -1 || regnum == HPPA_PCSQ_HEAD_REGNUM)
 116     regcache_raw_collect (regcache, HPPA_PCSQ_HEAD_REGNUM, regs + 33 * 4);
 117   if (regnum == -1 || regnum == HPPA_PCSQ_TAIL_REGNUM)
 118     regcache_raw_collect (regcache, HPPA_PCSQ_TAIL_REGNUM, regs + 34 * 4);
 119   if (regnum == -1 || regnum == HPPA_PCOQ_HEAD_REGNUM)
 120     regcache_raw_collect (regcache, HPPA_PCOQ_HEAD_REGNUM, regs + 35 * 4);
 121   if (regnum == -1 || regnum == HPPA_PCOQ_TAIL_REGNUM)
 122     regcache_raw_collect (regcache, HPPA_PCOQ_TAIL_REGNUM, regs + 36 * 4);
 123   if (regnum == -1 || regnum == HPPA_IPSW_REGNUM)
 124     regcache_raw_collect (regcache, HPPA_IPSW_REGNUM, regs);
 125   if (regnum == -1 || regnum == HPPA_SR4_REGNUM)
 126     regcache_raw_collect (regcache, HPPA_SR4_REGNUM, regs + 41 * 4);
 127   if (regnum == -1 || regnum == HPPA_SR4_REGNUM + 1)
 128     regcache_raw_collect (regcache, HPPA_SR4_REGNUM + 1, regs + 37 * 4);
 129   if (regnum == -1 || regnum == HPPA_SR4_REGNUM + 2)
 130     regcache_raw_collect (regcache, HPPA_SR4_REGNUM + 2, regs + 38 * 4);
 131   if (regnum == -1 || regnum == HPPA_SR4_REGNUM + 3)
 132     regcache_raw_collect (regcache, HPPA_SR4_REGNUM + 3, regs + 39 * 4);
 133   if (regnum == -1 || regnum == HPPA_SR4_REGNUM + 4)
 134     regcache_raw_collect (regcache, HPPA_SR4_REGNUM + 4, regs + 40 * 4);
 135 }
 136
 137 /* Collect the floating-point registers from REGCACHE and store them
 138    in FPREGS.  */
 139
 140 static void
 141 hppanbsd_collect_fpregset (struct regcache *regcache,
 142                           void *fpregs, int regnum)
 143 {
 144   char *regs = fpregs;
 145   int i;
 146
 147   for (i = HPPA_FP0_REGNUM; i <= HPPA_FP31R_REGNUM; i += 2, regs += 8)
 148     {
 149       if (regnum == -1 || regnum == i || regnum == i + 1)
 150         {
 151           regcache_raw_collect (regcache, i, regs);
 152           regcache_raw_collect (regcache, i + 1, regs + 4);
 153         }
 154     }
 155 }
 156 \f
 157
 158 /* Fetch register REGNUM from the inferior.  If REGNUM is -1, do this
 159    for all registers (including the floating-point registers).  */
 160
 161 static void
 162 hppanbsd_fetch_registers (struct target_ops *ops,
 163                           struct regcache *regcache, int regnum)
 164
 165 {
 166   pid_t pid = ptid_get_pid (regcache_get_ptid (regcache));
 167
 168   if (regnum == -1 || hppanbsd_gregset_supplies_p (regnum))
 169     {
 170       struct reg regs;
 171
 172       if (ptrace (PT_GETREGS, pid, (PTRACE_TYPE_ARG3) &regs, 0) == -1)
 173         perror_with_name (_("Couldn't get registers"));
 174
 175       hppanbsd_supply_gregset (regcache, &regs);
 176     }
 177
 178   if (regnum == -1 || hppanbsd_fpregset_supplies_p (regnum))
 179     {
 180       struct fpreg fpregs;
 181
 182       if (ptrace (PT_GETFPREGS, pid, (PTRACE_TYPE_ARG3) &fpregs, 0) == -1)
 183         perror_with_name (_("Couldn't get floating point status"));
 184
 185       hppanbsd_supply_fpregset (regcache, &fpregs);
 186     }
 187 }
 188
 189 /* Store register REGNUM back into the inferior.  If REGNUM is -1, do
 190    this for all registers (including the floating-point registers).  */
 191
 192 static void
 193 hppanbsd_store_registers (struct target_ops *ops,
 194                           struct regcache *regcache, int regnum)
 195 {
 196   pid_t pid = ptid_get_pid (regcache_get_ptid (regcache));
 197
 198   if (regnum == -1 || hppanbsd_gregset_supplies_p (regnum))
 199     {
 200       struct reg regs;
 201
 202       if (ptrace (PT_GETREGS, pid, (PTRACE_TYPE_ARG3) &regs, 0) == -1)
 203         perror_with_name (_("Couldn't get registers"));
 204
 205       hppanbsd_collect_gregset (regcache, &regs, regnum);
 206
 207       if (ptrace (PT_SETREGS, pid, (PTRACE_TYPE_ARG3) &regs, 0) == -1)
 208         perror_with_name (_("Couldn't write registers"));
 209     }
 210
 211   if (regnum == -1 || hppanbsd_fpregset_supplies_p (regnum))
 212     {
 213       struct fpreg fpregs;
 214
 215       if (ptrace (PT_GETFPREGS, pid, (PTRACE_TYPE_ARG3) &fpregs, 0) == -1)
 216         perror_with_name (_("Couldn't get floating point status"));
 217
 218       hppanbsd_collect_fpregset (regcache, &fpregs, regnum);
 219
 220       if (ptrace (PT_SETFPREGS, pid, (PTRACE_TYPE_ARG3) &fpregs, 0) == -1)
 221         perror_with_name (_("Couldn't write floating point status"));
 222     }
 223 }
 224
 225 void
 226 _initialize_hppanbsd_nat (void)
 227 {
 228   struct target_ops *t;
 229
 230   /* Add some extra features to the ptrace target.  */
 231   t = inf_ptrace_target ();
 232
 233   t->to_fetch_registers = hppanbsd_fetch_registers;
 234   t->to_store_registers = hppanbsd_store_registers;
 235
 236   t->to_pid_to_exec_file = nbsd_pid_to_exec_file;
 237
 238   add_target (t);
 239 }