gdb/hppa-netbsd-nat.c

   1 /* Native-dependent code for NetBSD/hppa.
   2
   3    Copyright (C) 2008-2024 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 "inferior.h"
  21 #include "regcache.h"
  22
  23 #include <sys/types.h>
  24 #include <sys/ptrace.h>
  25 #include <machine/reg.h>
  26
  27 #include "hppa-tdep.h"
  28 #include "inf-ptrace.h"
  29
  30 #include "netbsd-nat.h"
  31
  32 class hppa_nbsd_nat_target final : public nbsd_nat_target
  33 {
  34   void fetch_registers (struct regcache *, int) override;
  35   void store_registers (struct regcache *, int) override;
  36 };
  37
  38 static hppa_nbsd_nat_target the_hppa_nbsd_nat_target;
  39
  40 static int
  41 hppanbsd_gregset_supplies_p (int regnum)
  42 {
  43   return ((regnum >= HPPA_R0_REGNUM && regnum <= HPPA_R31_REGNUM) ||
  44           (regnum >= HPPA_SAR_REGNUM && regnum <= HPPA_PCSQ_TAIL_REGNUM) ||
  45           regnum == HPPA_IPSW_REGNUM ||
  46           (regnum >= HPPA_SR4_REGNUM && regnum <= HPPA_SR4_REGNUM + 5));
  47 }
  48
  49 static int
  50 hppanbsd_fpregset_supplies_p (int regnum)
  51 {
  52   return (regnum >= HPPA_FP0_REGNUM && regnum <= HPPA_FP31R_REGNUM);
  53 }
  54
  55 /* Supply the general-purpose registers stored in GREGS to REGCACHE.  */
  56
  57 static void
  58 hppanbsd_supply_gregset (struct regcache *regcache, const void *gregs)
  59 {
  60   const char *regs = gregs;
  61   const int *r = gregs;
  62   int regnum;
  63
  64   for (regnum = HPPA_R1_REGNUM; regnum <= HPPA_R31_REGNUM; regnum++)
  65     regcache->raw_supply (regnum, regs + regnum * 4);
  66
  67   regcache->raw_supply (HPPA_SAR_REGNUM, regs + 32 * 4);
  68   regcache->raw_supply (HPPA_PCSQ_HEAD_REGNUM, regs + 33 * 4);
  69   regcache->raw_supply (HPPA_PCSQ_TAIL_REGNUM, regs + 34 * 4);
  70   regcache->raw_supply (HPPA_PCOQ_HEAD_REGNUM, regs + 35 * 4);
  71   regcache->raw_supply (HPPA_PCOQ_TAIL_REGNUM, regs + 36 * 4);
  72   regcache->raw_supply (HPPA_IPSW_REGNUM, regs);
  73   regcache->raw_supply (HPPA_SR4_REGNUM, regs + 41 * 4);
  74   regcache->raw_supply (HPPA_SR4_REGNUM + 1, regs + 37 * 4);
  75   regcache->raw_supply (HPPA_SR4_REGNUM + 2, regs + 38 * 4);
  76   regcache->raw_supply (HPPA_SR4_REGNUM + 3, regs + 39 * 4);
  77   regcache->raw_supply (HPPA_SR4_REGNUM + 4, regs + 40 * 4);
  78 }
  79
  80 /* Supply the floating-point registers stored in FPREGS to REGCACHE.  */
  81
  82 static void
  83 hppanbsd_supply_fpregset (struct regcache *regcache, const void *fpregs)
  84 {
  85   const char *regs = fpregs;
  86   int regnum;
  87
  88   for (regnum = HPPA_FP0_REGNUM; regnum <= HPPA_FP31R_REGNUM;
  89        regnum += 2, regs += 8)
  90     {
  91       regcache->raw_supply (regnum, regs);
  92       regcache->raw_supply (regnum + 1, regs + 4);
  93     }
  94 }
  95
  96 /* Collect the general-purpose registers from REGCACHE and store them
  97    in GREGS.  */
  98
  99 static void
 100 hppanbsd_collect_gregset (const struct regcache *regcache,
 101                           void *gregs, int regnum)
 102 {
 103   char *regs = gregs;
 104   int *r = gregs;
 105   int i;
 106
 107   for (i = HPPA_R1_REGNUM; i <= HPPA_R31_REGNUM; i++)
 108     {
 109       if (regnum == -1 || regnum == i)
 110         regcache->raw_collect (i, regs + i * 4);
 111     }
 112
 113   if (regnum == -1 || regnum == HPPA_IPSW_REGNUM)
 114     regcache->raw_collect (HPPA_IPSW_REGNUM, regs);
 115   if (regnum == -1 || regnum == HPPA_PCOQ_HEAD_REGNUM)
 116     regcache->raw_collect (HPPA_PCOQ_HEAD_REGNUM, regs + 35 * 4);
 117   if (regnum == -1 || regnum == HPPA_PCOQ_TAIL_REGNUM)
 118     regcache->raw_collect (HPPA_PCOQ_TAIL_REGNUM, regs + 36 * 4);
 119
 120   if (regnum == -1 || regnum == HPPA_SAR_REGNUM)
 121     regcache->raw_collect (HPPA_SAR_REGNUM, regs + 32 * 4);
 122   if (regnum == -1 || regnum == HPPA_PCSQ_HEAD_REGNUM)
 123     regcache->raw_collect (HPPA_PCSQ_HEAD_REGNUM, regs + 33 * 4);
 124   if (regnum == -1 || regnum == HPPA_PCSQ_TAIL_REGNUM)
 125     regcache->raw_collect (HPPA_PCSQ_TAIL_REGNUM, regs + 34 * 4);
 126   if (regnum == -1 || regnum == HPPA_PCOQ_HEAD_REGNUM)
 127     regcache->raw_collect (HPPA_PCOQ_HEAD_REGNUM, regs + 35 * 4);
 128   if (regnum == -1 || regnum == HPPA_PCOQ_TAIL_REGNUM)
 129     regcache->raw_collect (HPPA_PCOQ_TAIL_REGNUM, regs + 36 * 4);
 130   if (regnum == -1 || regnum == HPPA_IPSW_REGNUM)
 131     regcache->raw_collect (HPPA_IPSW_REGNUM, regs);
 132   if (regnum == -1 || regnum == HPPA_SR4_REGNUM)
 133     regcache->raw_collect (HPPA_SR4_REGNUM, regs + 41 * 4);
 134   if (regnum == -1 || regnum == HPPA_SR4_REGNUM + 1)
 135     regcache->raw_collect (HPPA_SR4_REGNUM + 1, regs + 37 * 4);
 136   if (regnum == -1 || regnum == HPPA_SR4_REGNUM + 2)
 137     regcache->raw_collect (HPPA_SR4_REGNUM + 2, regs + 38 * 4);
 138   if (regnum == -1 || regnum == HPPA_SR4_REGNUM + 3)
 139     regcache->raw_collect (HPPA_SR4_REGNUM + 3, regs + 39 * 4);
 140   if (regnum == -1 || regnum == HPPA_SR4_REGNUM + 4)
 141     regcache->raw_collect (HPPA_SR4_REGNUM + 4, regs + 40 * 4);
 142 }
 143
 144 /* Collect the floating-point registers from REGCACHE and store them
 145    in FPREGS.  */
 146
 147 static void
 148 hppanbsd_collect_fpregset (struct regcache *regcache,
 149                           void *fpregs, int regnum)
 150 {
 151   char *regs = fpregs;
 152   int i;
 153
 154   for (i = HPPA_FP0_REGNUM; i <= HPPA_FP31R_REGNUM; i += 2, regs += 8)
 155     {
 156       if (regnum == -1 || regnum == i || regnum == i + 1)
 157         {
 158           regcache->raw_collect (i, regs);
 159           regcache->raw_collect (i + 1, regs + 4);
 160         }
 161     }
 162 }
 163 \f
 164
 165 /* Fetch register REGNUM from the inferior.  If REGNUM is -1, do this
 166    for all registers (including the floating-point registers).  */
 167
 168 void
 169 hppa_nbsd_nat_target::fetch_registers (struct regcache *regcache, int regnum)
 170
 171 {
 172   pid_t pid = regcache->ptid ().pid ();
 173   int lwp = regcache->ptid ().lwp ();
 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, lwp) == -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, lwp) == -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   int lwp = regcache->ptid ().lwp ();
 204
 205   if (regnum == -1 || hppanbsd_gregset_supplies_p (regnum))
 206     {
 207       struct reg regs;
 208
 209       if (ptrace (PT_GETREGS, pid, (PTRACE_TYPE_ARG3) &regs, lwp) == -1)
 210         perror_with_name (_("Couldn't get registers"));
 211
 212       hppanbsd_collect_gregset (regcache, &regs, regnum);
 213
 214       if (ptrace (PT_SETREGS, pid, (PTRACE_TYPE_ARG3) &regs, lwp) == -1)
 215         perror_with_name (_("Couldn't write registers"));
 216     }
 217
 218   if (regnum == -1 || hppanbsd_fpregset_supplies_p (regnum))
 219     {
 220       struct fpreg fpregs;
 221
 222       if (ptrace (PT_GETFPREGS, pid, (PTRACE_TYPE_ARG3) &fpregs, lwp) == -1)
 223         perror_with_name (_("Couldn't get floating point status"));
 224
 225       hppanbsd_collect_fpregset (regcache, &fpregs, regnum);
 226
 227       if (ptrace (PT_SETFPREGS, pid, (PTRACE_TYPE_ARG3) &fpregs, lwp) == -1)
 228         perror_with_name (_("Couldn't write floating point status"));
 229     }
 230 }
 231
 232 void _initialize_hppanbsd_nat ();
 233 void
 234 _initialize_hppanbsd_nat ()
 235 {
 236   add_inf_child_target (&the_hppa_nbsd_nat_target);
 237 }