gdb/hppa-nbsd-nat.c

   1 /* Native-dependent code for NetBSD/hppa.
   2
   3    Copyright (C) 2008-2019 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 class hppa_nbsd_nat_target final : public nbsd_nat_target
  34 {
  35   void fetch_registers (struct regcache *, int) override;
  36   void store_registers (struct regcache *, int) override;
  37 };
  38
  39 static hppa_nbsd_nat_target the_hppa_nbsd_nat_target;
  40
  41 static int
  42 hppanbsd_gregset_supplies_p (int regnum)
  43 {
  44   return ((regnum >= HPPA_R0_REGNUM && regnum <= HPPA_R31_REGNUM) ||
  45           (regnum >= HPPA_SAR_REGNUM && regnum <= HPPA_PCSQ_TAIL_REGNUM) ||
  46           regnum == HPPA_IPSW_REGNUM ||
  47           (regnum >= HPPA_SR4_REGNUM && regnum <= HPPA_SR4_REGNUM + 5));
  48 }
  49
  50 static int
  51 hppanbsd_fpregset_supplies_p (int regnum)
  52 {
  53   return (regnum >= HPPA_FP0_REGNUM && regnum <= HPPA_FP31R_REGNUM);
  54 }
  55
  56 /* Supply the general-purpose registers stored in GREGS to REGCACHE.  */
  57
  58 static void
  59 hppanbsd_supply_gregset (struct regcache *regcache, const void *gregs)
  60 {
  61   const char *regs = gregs;
  62   const int *r = gregs;
  63   int regnum;
  64
  65   for (regnum = HPPA_R1_REGNUM; regnum <= HPPA_R31_REGNUM; regnum++)
  66     regcache->raw_supply (regnum, regs + regnum * 4);
  67
  68   regcache->raw_supply (HPPA_SAR_REGNUM, regs + 32 * 4);
  69   regcache->raw_supply (HPPA_PCSQ_HEAD_REGNUM, regs + 33 * 4);
  70   regcache->raw_supply (HPPA_PCSQ_TAIL_REGNUM, regs + 34 * 4);
  71   regcache->raw_supply (HPPA_PCOQ_HEAD_REGNUM, regs + 35 * 4);
  72   regcache->raw_supply (HPPA_PCOQ_TAIL_REGNUM, regs + 36 * 4);
  73   regcache->raw_supply (HPPA_IPSW_REGNUM, regs);
  74   regcache->raw_supply (HPPA_SR4_REGNUM, regs + 41 * 4);
  75   regcache->raw_supply (HPPA_SR4_REGNUM + 1, regs + 37 * 4);
  76   regcache->raw_supply (HPPA_SR4_REGNUM + 2, regs + 38 * 4);
  77   regcache->raw_supply (HPPA_SR4_REGNUM + 3, regs + 39 * 4);
  78   regcache->raw_supply (HPPA_SR4_REGNUM + 4, regs + 40 * 4);
  79 }
  80
  81 /* Supply the floating-point registers stored in FPREGS to REGCACHE.  */
  82
  83 static void
  84 hppanbsd_supply_fpregset (struct regcache *regcache, const void *fpregs)
  85 {
  86   const char *regs = fpregs;
  87   int regnum;
  88
  89   for (regnum = HPPA_FP0_REGNUM; regnum <= HPPA_FP31R_REGNUM;
  90        regnum += 2, regs += 8)
  91     {
  92       regcache->raw_supply (regnum, regs);
  93       regcache->raw_supply (regnum + 1, regs + 4);
  94     }
  95 }
  96
  97 /* Collect the general-purpose registers from REGCACHE and store them
  98    in GREGS.  */
  99
 100 static void
 101 hppanbsd_collect_gregset (const struct regcache *regcache,
 102                           void *gregs, int regnum)
 103 {
 104   char *regs = gregs;
 105   int *r = gregs;
 106   int i;
 107
 108   for (i = HPPA_R1_REGNUM; i <= HPPA_R31_REGNUM; i++)
 109     {
 110       if (regnum == -1 || regnum == i)
 111         regcache->raw_collect (i, regs + i * 4);
 112     }
 113
 114   if (regnum == -1 || regnum == HPPA_IPSW_REGNUM)
 115     regcache->raw_collect (HPPA_IPSW_REGNUM, regs);
 116   if (regnum == -1 || regnum == HPPA_PCOQ_HEAD_REGNUM)
 117     regcache->raw_collect (HPPA_PCOQ_HEAD_REGNUM, regs + 35 * 4);
 118   if (regnum == -1 || regnum == HPPA_PCOQ_TAIL_REGNUM)
 119     regcache->raw_collect (HPPA_PCOQ_TAIL_REGNUM, regs + 36 * 4);
 120
 121   if (regnum == -1 || regnum == HPPA_SAR_REGNUM)
 122     regcache->raw_collect (HPPA_SAR_REGNUM, regs + 32 * 4);
 123   if (regnum == -1 || regnum == HPPA_PCSQ_HEAD_REGNUM)
 124     regcache->raw_collect (HPPA_PCSQ_HEAD_REGNUM, regs + 33 * 4);
 125   if (regnum == -1 || regnum == HPPA_PCSQ_TAIL_REGNUM)
 126     regcache->raw_collect (HPPA_PCSQ_TAIL_REGNUM, regs + 34 * 4);
 127   if (regnum == -1 || regnum == HPPA_PCOQ_HEAD_REGNUM)
 128     regcache->raw_collect (HPPA_PCOQ_HEAD_REGNUM, regs + 35 * 4);
 129   if (regnum == -1 || regnum == HPPA_PCOQ_TAIL_REGNUM)
 130     regcache->raw_collect (HPPA_PCOQ_TAIL_REGNUM, regs + 36 * 4);
 131   if (regnum == -1 || regnum == HPPA_IPSW_REGNUM)
 132     regcache->raw_collect (HPPA_IPSW_REGNUM, regs);
 133   if (regnum == -1 || regnum == HPPA_SR4_REGNUM)
 134     regcache->raw_collect (HPPA_SR4_REGNUM, regs + 41 * 4);
 135   if (regnum == -1 || regnum == HPPA_SR4_REGNUM + 1)
 136     regcache->raw_collect (HPPA_SR4_REGNUM + 1, regs + 37 * 4);
 137   if (regnum == -1 || regnum == HPPA_SR4_REGNUM + 2)
 138     regcache->raw_collect (HPPA_SR4_REGNUM + 2, regs + 38 * 4);
 139   if (regnum == -1 || regnum == HPPA_SR4_REGNUM + 3)
 140     regcache->raw_collect (HPPA_SR4_REGNUM + 3, regs + 39 * 4);
 141   if (regnum == -1 || regnum == HPPA_SR4_REGNUM + 4)
 142     regcache->raw_collect (HPPA_SR4_REGNUM + 4, regs + 40 * 4);
 143 }
 144
 145 /* Collect the floating-point registers from REGCACHE and store them
 146    in FPREGS.  */
 147
 148 static void
 149 hppanbsd_collect_fpregset (struct regcache *regcache,
 150                           void *fpregs, int regnum)
 151 {
 152   char *regs = fpregs;
 153   int i;
 154
 155   for (i = HPPA_FP0_REGNUM; i <= HPPA_FP31R_REGNUM; i += 2, regs += 8)
 156     {
 157       if (regnum == -1 || regnum == i || regnum == i + 1)
 158         {
 159           regcache->raw_collect (i, regs);
 160           regcache->raw_collect (i + 1, regs + 4);
 161         }
 162     }
 163 }
 164 \f
 165
 166 /* Fetch register REGNUM from the inferior.  If REGNUM is -1, do this
 167    for all registers (including the floating-point registers).  */
 168
 169 void
 170 hppa_nbsd_nat_target::fetch_registers (struct regcache *regcache, int regnum)
 171
 172 {
 173   pid_t pid = regcache->ptid ().pid ();
 174
 175   if (regnum == -1 || hppanbsd_gregset_supplies_p (regnum))
 176     {
 177       struct reg regs;
 178
 179       if (ptrace (PT_GETREGS, pid, (PTRACE_TYPE_ARG3) &regs, 0) == -1)
 180         perror_with_name (_("Couldn't get registers"));
 181
 182       hppanbsd_supply_gregset (regcache, &regs);
 183     }
 184
 185   if (regnum == -1 || hppanbsd_fpregset_supplies_p (regnum))
 186     {
 187       struct fpreg fpregs;
 188
 189       if (ptrace (PT_GETFPREGS, pid, (PTRACE_TYPE_ARG3) &fpregs, 0) == -1)
 190         perror_with_name (_("Couldn't get floating point status"));
 191
 192       hppanbsd_supply_fpregset (regcache, &fpregs);
 193     }
 194 }
 195
 196 /* Store register REGNUM back into the inferior.  If REGNUM is -1, do
 197    this for all registers (including the floating-point registers).  */
 198
 199 void
 200 hppa_nbsd_nat_target::store_registers (struct regcache *regcache, int regnum)
 201 {
 202   pid_t pid = regcache->ptid ().pid ();
 203
 204   if (regnum == -1 || hppanbsd_gregset_supplies_p (regnum))
 205     {
 206       struct reg regs;
 207
 208       if (ptrace (PT_GETREGS, pid, (PTRACE_TYPE_ARG3) &regs, 0) == -1)
 209         perror_with_name (_("Couldn't get registers"));
 210
 211       hppanbsd_collect_gregset (regcache, &regs, regnum);
 212
 213       if (ptrace (PT_SETREGS, pid, (PTRACE_TYPE_ARG3) &regs, 0) == -1)
 214         perror_with_name (_("Couldn't write registers"));
 215     }
 216
 217   if (regnum == -1 || hppanbsd_fpregset_supplies_p (regnum))
 218     {
 219       struct fpreg fpregs;
 220
 221       if (ptrace (PT_GETFPREGS, pid, (PTRACE_TYPE_ARG3) &fpregs, 0) == -1)
 222         perror_with_name (_("Couldn't get floating point status"));
 223
 224       hppanbsd_collect_fpregset (regcache, &fpregs, regnum);
 225
 226       if (ptrace (PT_SETFPREGS, pid, (PTRACE_TYPE_ARG3) &fpregs, 0) == -1)
 227         perror_with_name (_("Couldn't write floating point status"));
 228     }
 229 }
 230
 231 void
 232 _initialize_hppanbsd_nat (void)
 233 {
 234   add_inf_child_target (&the_hppa_nbsd_nat_target);
 235 }