gdb/hppabsd-nat.c

   1 /* Native-dependent code for HP PA-RISC BSD's.
   2
   3    Copyright (C) 2004-2015 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 #include "target.h"
  24
  25 #include <sys/types.h>
  26 #include <sys/ptrace.h>
  27 #include <machine/reg.h>
  28
  29 #include "hppa-tdep.h"
  30 #include "inf-ptrace.h"
  31
  32 static int
  33 hppabsd_gregset_supplies_p (int regnum)
  34 {
  35   return (regnum >= HPPA_R0_REGNUM && regnum <= HPPA_CR27_REGNUM);
  36 }
  37
  38 static int
  39 hppabsd_fpregset_supplies_p (int regnum)
  40 {
  41   return (regnum >= HPPA_FP0_REGNUM && regnum <= HPPA_FP31R_REGNUM);
  42 }
  43
  44 /* Supply the general-purpose registers stored in GREGS to REGCACHE.  */
  45
  46 static void
  47 hppabsd_supply_gregset (struct regcache *regcache, const void *gregs)
  48 {
  49   gdb_byte zero[4] = { 0 };
  50   const char *regs = gregs;
  51   int regnum;
  52
  53   regcache_raw_supply (regcache, HPPA_R0_REGNUM, &zero);
  54   for (regnum = HPPA_R1_REGNUM; regnum <= HPPA_R31_REGNUM; regnum++)
  55     regcache_raw_supply (regcache, regnum, regs + regnum * 4);
  56
  57   if (sizeof(struct reg) >= 46 * 4)
  58     {
  59       regcache_raw_supply (regcache, HPPA_IPSW_REGNUM, regs);
  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_SR0_REGNUM, regs + 37 * 4);
  66       regcache_raw_supply (regcache, HPPA_SR1_REGNUM, regs + 38 * 4);
  67       regcache_raw_supply (regcache, HPPA_SR2_REGNUM, regs + 39 * 4);
  68       regcache_raw_supply (regcache, HPPA_SR3_REGNUM, regs + 40 * 4);
  69       regcache_raw_supply (regcache, HPPA_SR4_REGNUM, regs + 41 * 4);
  70       regcache_raw_supply (regcache, HPPA_SR5_REGNUM, regs + 42 * 4);
  71       regcache_raw_supply (regcache, HPPA_SR6_REGNUM, regs + 43 * 4);
  72       regcache_raw_supply (regcache, HPPA_SR7_REGNUM, regs + 44 * 4);
  73       regcache_raw_supply (regcache, HPPA_CR26_REGNUM, regs + 45 * 4);
  74       regcache_raw_supply (regcache, HPPA_CR27_REGNUM, regs + 46 * 4);
  75     }
  76   else
  77     {
  78       regcache_raw_supply (regcache, HPPA_SAR_REGNUM, regs);
  79       regcache_raw_supply (regcache, HPPA_PCOQ_HEAD_REGNUM, regs + 32 * 4);
  80       regcache_raw_supply (regcache, HPPA_PCOQ_TAIL_REGNUM, regs + 33 * 4);
  81     }
  82 }
  83
  84 /* Supply the floating-point registers stored in FPREGS to REGCACHE.  */
  85
  86 static void
  87 hppabsd_supply_fpregset (struct regcache *regcache, const void *fpregs)
  88 {
  89   const char *regs = fpregs;
  90   int regnum;
  91
  92   for (regnum = HPPA_FP0_REGNUM; regnum <= HPPA_FP31R_REGNUM;
  93        regnum += 2, regs += 8)
  94     {
  95       regcache_raw_supply (regcache, regnum, regs);
  96       regcache_raw_supply (regcache, regnum + 1, regs + 4);
  97     }
  98 }
  99
 100 /* Collect the general-purpose registers from REGCACHE and store them
 101    in GREGS.  */
 102
 103 static void
 104 hppabsd_collect_gregset (const struct regcache *regcache,
 105                           void *gregs, int regnum)
 106 {
 107   char *regs = gregs;
 108   int i;
 109
 110   for (i = HPPA_R1_REGNUM; i <= HPPA_R31_REGNUM; i++)
 111     {
 112       if (regnum == -1 || regnum == i)
 113         regcache_raw_collect (regcache, i, regs + i * 4);
 114     }
 115
 116   if (sizeof(struct reg) >= 46 * 4)
 117     {
 118       if (regnum == -1 || regnum == HPPA_IPSW_REGNUM)
 119         regcache_raw_collect (regcache, HPPA_IPSW_REGNUM, regs);
 120       if (regnum == -1 || regnum == HPPA_SAR_REGNUM)
 121         regcache_raw_collect (regcache, HPPA_SAR_REGNUM, regs + 32 * 4);
 122       if (regnum == -1 || regnum == HPPA_PCSQ_HEAD_REGNUM)
 123         regcache_raw_collect (regcache, HPPA_PCSQ_HEAD_REGNUM, regs + 33 * 4);
 124       if (regnum == -1 || regnum == HPPA_PCSQ_TAIL_REGNUM)
 125         regcache_raw_collect (regcache, HPPA_PCSQ_TAIL_REGNUM, regs + 34 * 4);
 126       if (regnum == -1 || regnum == HPPA_PCOQ_HEAD_REGNUM)
 127         regcache_raw_collect (regcache, HPPA_PCOQ_HEAD_REGNUM, regs + 35 * 4);
 128       if (regnum == -1 || regnum == HPPA_PCOQ_TAIL_REGNUM)
 129         regcache_raw_collect (regcache, HPPA_PCOQ_TAIL_REGNUM, regs + 36 * 4);
 130       if (regnum == -1 || regnum == HPPA_SR0_REGNUM)
 131         regcache_raw_collect (regcache, HPPA_SR0_REGNUM, regs + 37 * 4);
 132       if (regnum == -1 || regnum == HPPA_SR1_REGNUM)
 133         regcache_raw_collect (regcache, HPPA_SR1_REGNUM, regs + 38 * 4);
 134       if (regnum == -1 || regnum == HPPA_SR2_REGNUM)
 135         regcache_raw_collect (regcache, HPPA_SR2_REGNUM, regs + 39 * 4);
 136       if (regnum == -1 || regnum == HPPA_SR3_REGNUM)
 137         regcache_raw_collect (regcache, HPPA_SR3_REGNUM, regs + 40 * 4);
 138       if (regnum == -1 || regnum == HPPA_SR4_REGNUM)
 139         regcache_raw_collect (regcache, HPPA_SR4_REGNUM, regs + 41 * 4);
 140       if (regnum == -1 || regnum == HPPA_SR5_REGNUM)
 141         regcache_raw_collect (regcache, HPPA_SR5_REGNUM, regs + 42 * 4);
 142       if (regnum == -1 || regnum == HPPA_SR6_REGNUM)
 143         regcache_raw_collect (regcache, HPPA_SR6_REGNUM, regs + 43 * 4);
 144       if (regnum == -1 || regnum == HPPA_SR7_REGNUM)
 145         regcache_raw_collect (regcache, HPPA_SR7_REGNUM, regs + 44 * 4);
 146       if (regnum == -1 || regnum == HPPA_CR26_REGNUM)
 147         regcache_raw_collect (regcache, HPPA_CR26_REGNUM, regs + 45 * 4);
 148       if (regnum == -1 || regnum == HPPA_CR27_REGNUM)
 149         regcache_raw_collect (regcache, HPPA_CR27_REGNUM, regs + 46 * 4);
 150     }
 151   else
 152     {
 153       if (regnum == -1 || regnum == HPPA_SAR_REGNUM)
 154         regcache_raw_collect (regcache, HPPA_SAR_REGNUM, regs);
 155       if (regnum == -1 || regnum == HPPA_PCOQ_HEAD_REGNUM)
 156         regcache_raw_collect (regcache, HPPA_PCOQ_HEAD_REGNUM, regs + 32 * 4);
 157       if (regnum == -1 || regnum == HPPA_PCOQ_TAIL_REGNUM)
 158         regcache_raw_collect (regcache, HPPA_PCOQ_TAIL_REGNUM, regs + 33 * 4);
 159     }
 160 }
 161
 162 /* Collect the floating-point registers from REGCACHE and store them
 163    in FPREGS.  */
 164
 165 static void
 166 hppabsd_collect_fpregset (struct regcache *regcache,
 167                           void *fpregs, int regnum)
 168 {
 169   char *regs = fpregs;
 170   int i;
 171
 172   for (i = HPPA_FP0_REGNUM; i <= HPPA_FP31R_REGNUM; i += 2, regs += 8)
 173     {
 174       if (regnum == -1 || regnum == i || regnum == i + 1)
 175         {
 176           regcache_raw_collect (regcache, i, regs);
 177           regcache_raw_collect (regcache, i + 1, regs + 4);
 178         }
 179     }
 180 }
 181 \f
 182
 183 /* Fetch register REGNUM from the inferior.  If REGNUM is -1, do this
 184    for all registers (including the floating-point registers).  */
 185
 186 static void
 187 hppabsd_fetch_registers (struct target_ops *ops,
 188                          struct regcache *regcache, int regnum)
 189 {
 190   if (regnum == -1 || hppabsd_gregset_supplies_p (regnum))
 191     {
 192       struct reg regs;
 193
 194       if (ptrace (PT_GETREGS, ptid_get_pid (inferior_ptid),
 195                   (PTRACE_TYPE_ARG3) &regs, 0) == -1)
 196         perror_with_name (_("Couldn't get registers"));
 197
 198       hppabsd_supply_gregset (regcache, &regs);
 199     }
 200
 201   if (regnum == -1 || hppabsd_fpregset_supplies_p (regnum))
 202     {
 203       struct fpreg fpregs;
 204
 205       if (ptrace (PT_GETFPREGS, ptid_get_pid (inferior_ptid),
 206                   (PTRACE_TYPE_ARG3) &fpregs, 0) == -1)
 207         perror_with_name (_("Couldn't get floating point status"));
 208
 209       hppabsd_supply_fpregset (regcache, &fpregs);
 210     }
 211 }
 212
 213 /* Store register REGNUM back into the inferior.  If REGNUM is -1, do
 214    this for all registers (including the floating-point registers).  */
 215
 216 static void
 217 hppabsd_store_registers (struct target_ops *ops,
 218                          struct regcache *regcache, int regnum)
 219 {
 220   if (regnum == -1 || hppabsd_gregset_supplies_p (regnum))
 221     {
 222       struct reg regs;
 223
 224       if (ptrace (PT_GETREGS, ptid_get_pid (inferior_ptid),
 225                   (PTRACE_TYPE_ARG3) &regs, 0) == -1)
 226         perror_with_name (_("Couldn't get registers"));
 227
 228       hppabsd_collect_gregset (regcache, &regs, regnum);
 229
 230       if (ptrace (PT_SETREGS, ptid_get_pid (inferior_ptid),
 231                   (PTRACE_TYPE_ARG3) &regs, 0) == -1)
 232         perror_with_name (_("Couldn't write registers"));
 233     }
 234
 235   if (regnum == -1 || hppabsd_fpregset_supplies_p (regnum))
 236     {
 237       struct fpreg fpregs;
 238
 239       if (ptrace (PT_GETFPREGS, ptid_get_pid (inferior_ptid),
 240                   (PTRACE_TYPE_ARG3) &fpregs, 0) == -1)
 241         perror_with_name (_("Couldn't get floating point status"));
 242
 243       hppabsd_collect_fpregset (regcache, &fpregs, regnum);
 244
 245       if (ptrace (PT_SETFPREGS, ptid_get_pid (inferior_ptid),
 246                   (PTRACE_TYPE_ARG3) &fpregs, 0) == -1)
 247         perror_with_name (_("Couldn't write floating point status"));
 248     }
 249 }
 250
 251 /* Provide a prototype to silence -Wmissing-prototypes.  */
 252 void _initialize_hppabsd_nat (void);
 253
 254 void
 255 _initialize_hppabsd_nat (void)
 256 {
 257   struct target_ops *t;
 258
 259   /* Add in local overrides.  */
 260   t = inf_ptrace_target ();
 261   t->to_fetch_registers = hppabsd_fetch_registers;
 262   t->to_store_registers = hppabsd_store_registers;
 263   add_target (t);
 264 }