gnu/dist/gdb6/gdb/hppanbsd-nat.c

   1 /* Native-dependent code for NetBSD/hppa.
   2
   3    Copyright (C) 2004, 2005 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 "target.h"
  25 #include "regcache.h"
  26
  27 #include <sys/types.h>
  28 #include <sys/ptrace.h>
  29 #include <machine/reg.h>
  30
  31 #include "hppa-tdep.h"
  32 #include "inf-ptrace.h"
  33
  34 #include "nbsd-nat.h"
  35
  36
  37 static int
  38 hppanbsd_gregset_supplies_p (int regnum)
  39 {
  40   return ((regnum >= HPPA_R0_REGNUM && regnum <= HPPA_R31_REGNUM) ||
  41           (regnum >= HPPA_SAR_REGNUM && regnum <= HPPA_PCSQ_TAIL_REGNUM) ||
  42           regnum == HPPA_IPSW_REGNUM ||
  43           (regnum >= HPPA_SR4_REGNUM && regnum <= HPPA_SR4_REGNUM + 5));
  44 }
  45
  46 static int
  47 hppanbsd_fpregset_supplies_p (int regnum)
  48 {
  49   return (regnum >= HPPA_FP0_REGNUM && regnum <= HPPA_FP31R_REGNUM);
  50 }
  51
  52 /* Supply the general-purpose registers stored in GREGS to REGCACHE.  */
  53
  54 static void
  55 hppanbsd_supply_gregset (struct regcache *regcache, const void *gregs)
  56 {
  57   const char *regs = gregs;
  58   const int *r = gregs;
  59   int regnum;
  60
  61   for (regnum = HPPA_R1_REGNUM; regnum <= HPPA_R31_REGNUM; regnum++)
  62     regcache_raw_supply (regcache, regnum, regs + regnum * 4);
  63
  64   regcache_raw_supply (regcache, HPPA_SAR_REGNUM, regs + 32 * 4);
  65   regcache_raw_supply (regcache, HPPA_PCSQ_HEAD_REGNUM, regs + 33 * 4);
  66   regcache_raw_supply (regcache, HPPA_PCSQ_TAIL_REGNUM, regs + 34 * 4);
  67   regcache_raw_supply (regcache, HPPA_PCOQ_HEAD_REGNUM, regs + 35 * 4);
  68   regcache_raw_supply (regcache, HPPA_PCOQ_TAIL_REGNUM, regs + 36 * 4);
  69   regcache_raw_supply (regcache, HPPA_IPSW_REGNUM, regs);
  70   regcache_raw_supply (regcache, HPPA_SR4_REGNUM, regs + 41 * 4);
  71   regcache_raw_supply (regcache, HPPA_SR4_REGNUM + 1, regs + 37 * 4);
  72   regcache_raw_supply (regcache, HPPA_SR4_REGNUM + 2, regs + 38 * 4);
  73   regcache_raw_supply (regcache, HPPA_SR4_REGNUM + 3, regs + 39 * 4);
  74   regcache_raw_supply (regcache, HPPA_SR4_REGNUM + 4, regs + 40 * 4);
  75 }
  76
  77 /* Supply the floating-point registers stored in FPREGS to REGCACHE.  */
  78
  79 static void
  80 hppanbsd_supply_fpregset (struct regcache *regcache, const void *fpregs)
  81 {
  82   const char *regs = fpregs;
  83   int regnum;
  84
  85   for (regnum = HPPA_FP0_REGNUM; regnum <= HPPA_FP31R_REGNUM;
  86        regnum += 2, regs += 8)
  87     {
  88       regcache_raw_supply (regcache, regnum, regs);
  89       regcache_raw_supply (regcache, regnum + 1, regs + 4);
  90     }
  91 }
  92
  93 /* Collect the general-purpose registers from REGCACHE and store them
  94    in GREGS.  */
  95
  96 static void
  97 hppanbsd_collect_gregset (const struct regcache *regcache,
  98                           void *gregs, int regnum)
  99 {
 100   char *regs = gregs;
 101   int *r = gregs;
 102   int i;
 103
 104   for (i = HPPA_R1_REGNUM; i <= HPPA_R31_REGNUM; i++)
 105     {
 106       if (regnum == -1 || regnum == i)
 107         regcache_raw_collect (regcache, i, regs + i * 4);
 108     }
 109
 110   if (regnum == -1 || regnum == HPPA_IPSW_REGNUM)
 111     regcache_raw_collect (regcache, HPPA_IPSW_REGNUM, regs);
 112   if (regnum == -1 || regnum == HPPA_PCOQ_HEAD_REGNUM)
 113     regcache_raw_collect (regcache, HPPA_PCOQ_HEAD_REGNUM, regs + 35 * 4);
 114   if (regnum == -1 || regnum == HPPA_PCOQ_TAIL_REGNUM)
 115     regcache_raw_collect (regcache, HPPA_PCOQ_TAIL_REGNUM, regs + 36 * 4);
 116
 117   if (regnum == -1 || regnum == HPPA_SAR_REGNUM)
 118     regcache_raw_collect (regcache, HPPA_SAR_REGNUM, regs + 32 * 4);
 119   if (regnum == -1 || regnum == HPPA_PCSQ_HEAD_REGNUM)
 120     regcache_raw_collect (regcache, HPPA_PCSQ_HEAD_REGNUM, regs + 33 * 4);
 121   if (regnum == -1 || regnum == HPPA_PCSQ_TAIL_REGNUM)
 122     regcache_raw_collect (regcache, HPPA_PCSQ_TAIL_REGNUM, regs + 34 * 4);
 123   if (regnum == -1 || regnum == HPPA_PCOQ_HEAD_REGNUM)
 124     regcache_raw_collect (regcache, HPPA_PCOQ_HEAD_REGNUM, regs + 35 * 4);
 125   if (regnum == -1 || regnum == HPPA_PCOQ_TAIL_REGNUM)
 126     regcache_raw_collect (regcache, HPPA_PCOQ_TAIL_REGNUM, regs + 36 * 4);
 127   if (regnum == -1 || regnum == HPPA_IPSW_REGNUM)
 128     regcache_raw_collect (regcache, HPPA_IPSW_REGNUM, regs);
 129   if (regnum == -1 || regnum == HPPA_SR4_REGNUM)
 130     regcache_raw_collect (regcache, HPPA_SR4_REGNUM, regs + 41 * 4);
 131   if (regnum == -1 || regnum == HPPA_SR4_REGNUM + 1)
 132     regcache_raw_collect (regcache, HPPA_SR4_REGNUM + 1, regs + 37 * 4);
 133   if (regnum == -1 || regnum == HPPA_SR4_REGNUM + 2)
 134     regcache_raw_collect (regcache, HPPA_SR4_REGNUM + 2, regs + 38 * 4);
 135   if (regnum == -1 || regnum == HPPA_SR4_REGNUM + 3)
 136     regcache_raw_collect (regcache, HPPA_SR4_REGNUM + 3, regs + 39 * 4);
 137   if (regnum == -1 || regnum == HPPA_SR4_REGNUM + 4)
 138     regcache_raw_collect (regcache, HPPA_SR4_REGNUM + 4, regs + 40 * 4);
 139 }
 140
 141 /* Collect the floating-point registers from REGCACHE and store them
 142    in FPREGS.  */
 143
 144 static void
 145 hppanbsd_collect_fpregset (struct regcache *regcache,
 146                           void *fpregs, int regnum)
 147 {
 148   char *regs = fpregs;
 149   int i;
 150
 151   for (i = HPPA_FP0_REGNUM; i <= HPPA_FP31R_REGNUM; i += 2, regs += 8)
 152     {
 153       if (regnum == -1 || regnum == i || regnum == i + 1)
 154         {
 155           regcache_raw_collect (regcache, i, regs);
 156           regcache_raw_collect (regcache, i + 1, regs + 4);
 157         }
 158     }
 159 }
 160 \f
 161
 162 /* Fetch register REGNUM from the inferior.  If REGNUM is -1, do this
 163    for all registers (including the floating-point registers).  */
 164
 165 static void
 166 hppanbsd_fetch_registers (int regnum)
 167 {
 168   struct regcache *regcache = current_regcache;
 169
 170   if (regnum == -1 || hppanbsd_gregset_supplies_p (regnum))
 171     {
 172       struct reg regs;
 173
 174       if (ptrace (PT_GETREGS, PIDGET (inferior_ptid),
 175                   (PTRACE_TYPE_ARG3) &regs, 0) == -1)
 176         perror_with_name (_("Couldn't get registers"));
 177
 178       hppanbsd_supply_gregset (regcache, &regs);
 179     }
 180
 181   if (regnum == -1 || hppanbsd_fpregset_supplies_p (regnum))
 182     {
 183       struct fpreg fpregs;
 184
 185       if (ptrace (PT_GETFPREGS, PIDGET (inferior_ptid),
 186                   (PTRACE_TYPE_ARG3) &fpregs, 0) == -1)
 187         perror_with_name (_("Couldn't get floating point status"));
 188
 189       hppanbsd_supply_fpregset (current_regcache, &fpregs);
 190     }
 191 }
 192
 193 /* Store register REGNUM back into the inferior.  If REGNUM is -1, do
 194    this for all registers (including the floating-point registers).  */
 195
 196 static void
 197 hppanbsd_store_registers (int regnum)
 198 {
 199   if (regnum == -1 || hppanbsd_gregset_supplies_p (regnum))
 200     {
 201       struct reg regs;
 202
 203       if (ptrace (PT_GETREGS, PIDGET (inferior_ptid),
 204                   (PTRACE_TYPE_ARG3) &regs, 0) == -1)
 205         perror_with_name (_("Couldn't get registers"));
 206
 207       hppanbsd_collect_gregset (current_regcache, &regs, regnum);
 208
 209       if (ptrace (PT_SETREGS, PIDGET (inferior_ptid),
 210                   (PTRACE_TYPE_ARG3) &regs, 0) == -1)
 211         perror_with_name (_("Couldn't write registers"));
 212     }
 213
 214   if (regnum == -1 || hppanbsd_fpregset_supplies_p (regnum))
 215     {
 216       struct fpreg fpregs;
 217
 218       if (ptrace (PT_GETFPREGS, PIDGET (inferior_ptid),
 219                   (PTRACE_TYPE_ARG3) &fpregs, 0) == -1)
 220         perror_with_name (_("Couldn't get floating point status"));
 221
 222       hppanbsd_collect_fpregset (current_regcache, &fpregs, regnum);
 223
 224       if (ptrace (PT_SETFPREGS, PIDGET (inferior_ptid),
 225                   (PTRACE_TYPE_ARG3) &fpregs, 0) == -1)
 226         perror_with_name (_("Couldn't write floating point status"));
 227     }
 228 }
 229
 230
 231 /* Provide a prototype to silence -Wmissing-prototypes.  */
 232 void _initialize_hppanbsd_nat (void);
 233
 234 void
 235 _initialize_hppanbsd_nat (void)
 236 {
 237   struct target_ops *t;
 238
 239   /* Add some extra features to the ptrace target.  */
 240   t = inf_ptrace_target ();
 241
 242   t->to_fetch_registers = hppanbsd_fetch_registers;
 243   t->to_store_registers = hppanbsd_store_registers;
 244
 245   t->to_pid_to_exec_file = nbsd_pid_to_exec_file;
 246
 247   add_target (t);
 248 }