gdb/hppabsd-nat.c

   1 /* Native-dependent code for HP PA-RISC BSD's.
   2
   3    Copyright 2004 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., 59 Temple Place - Suite 330,
  20    Boston, MA 02111-1307, USA.  */
  21
  22 #include "defs.h"
  23 #include "inferior.h"
  24 #include "regcache.h"
  25
  26 #include <sys/types.h>
  27 #include <sys/ptrace.h>
  28 #include <machine/reg.h>
  29
  30 #include "hppa-tdep.h"
  31
  32 static int
  33 hppabsd_gregset_supplies_p (int regnum)
  34 {
  35   return (regnum >= HPPA_R0_REGNUM && regnum <= HPPA_PCOQ_TAIL_REGNUM);
  36 }
  37
  38 /* Supply the general-purpose registers stored in GREGS to REGCACHE.  */
  39
  40 static void
  41 hppabsd_supply_gregset (struct regcache *regcache, const void *gregs)
  42 {
  43   const char *regs = gregs;
  44   int regnum;
  45
  46   for (regnum = HPPA_R1_REGNUM; regnum <= HPPA_R31_REGNUM; regnum++)
  47     regcache_raw_supply (regcache, regnum, regs + regnum * 4);
  48
  49   regcache_raw_supply (regcache, HPPA_SAR_REGNUM, regs);
  50   regcache_raw_supply (regcache, HPPA_PCOQ_HEAD_REGNUM, regs + 32 * 4);
  51   regcache_raw_supply (regcache, HPPA_PCOQ_TAIL_REGNUM, regs + 33 * 4);
  52 }
  53
  54 /* Collect the general-purpose registers from REGCACHE and store them
  55    in GREGS.  */
  56
  57 static void
  58 hppabsd_collect_gregset (const struct regcache *regcache,
  59                           void *gregs, int regnum)
  60 {
  61   char *regs = gregs;
  62   int i;
  63
  64   for (i = HPPA_R1_REGNUM; i <= HPPA_R31_REGNUM; i++)
  65     {
  66       if (regnum == -1 || regnum == i)
  67         regcache_raw_collect (regcache, i, regs + i * 4);
  68     }
  69
  70   if (regnum == -1 || regnum == HPPA_SAR_REGNUM)
  71     regcache_raw_collect (regcache, HPPA_SAR_REGNUM, regs);
  72   if (regnum == -1 || regnum == HPPA_PCOQ_HEAD_REGNUM)
  73     regcache_raw_collect (regcache, HPPA_PCOQ_HEAD_REGNUM, regs + 32 * 4);
  74   if (regnum == -1 || regnum == HPPA_PCOQ_TAIL_REGNUM)
  75     regcache_raw_collect (regcache, HPPA_PCOQ_TAIL_REGNUM, regs + 33 * 4);
  76 }
  77 \f
  78
  79 /* Fetch register REGNUM from the inferior.  If REGNUM is -1, do this
  80    for all registers (including the floating-point registers).  */
  81
  82 void
  83 fetch_inferior_registers (int regnum)
  84 {
  85   struct regcache *regcache = current_regcache;
  86
  87   if (regnum == -1 || hppabsd_gregset_supplies_p (regnum))
  88     {
  89       struct reg regs;
  90
  91       if (ptrace (PT_GETREGS, PIDGET (inferior_ptid),
  92                   (PTRACE_TYPE_ARG3) &regs, 0) == -1)
  93         perror_with_name ("Couldn't get registers");
  94
  95       hppabsd_supply_gregset (regcache, &regs);
  96     }
  97 }
  98
  99 /* Store register REGNUM back into the inferior.  If REGNUM is -1, do
 100    this for all registers (including the floating-point registers).  */
 101
 102 void
 103 store_inferior_registers (int regnum)
 104 {
 105   if (regnum == -1 || hppabsd_gregset_supplies_p (regnum))
 106     {
 107       struct reg regs;
 108
 109       if (ptrace (PT_GETREGS, PIDGET (inferior_ptid),
 110                   (PTRACE_TYPE_ARG3) &regs, 0) == -1)
 111         perror_with_name ("Couldn't get registers");
 112
 113       hppabsd_collect_gregset (current_regcache, &regs, regnum);
 114
 115       if (ptrace (PT_SETREGS, PIDGET (inferior_ptid),
 116                   (PTRACE_TYPE_ARG3) &regs, 0) == -1)
 117         perror_with_name ("Couldn't write registers");
 118     }
 119 }