text: /* Native-dependent code for OpenBSD/hppa.
  
     Copyright (C) 2004-2017 Free Software Foundation, Inc.
  
     This file is part of GDB.
  
     This program is free software; you can redistribute it and/or modify
     it under the terms of the GNU General Public License as published by
     the Free Software Foundation; either version 3 of the License, or
     (at your option) any later version.
  
     This program is distributed in the hope that it will be useful,
     but WITHOUT ANY WARRANTY; without even the implied warranty of
     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
     GNU General Public License for more details.
  
     You should have received a copy of the GNU General Public License
     along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  
  #include "defs.h"
  #include "inferior.h"
  #include "regcache.h"
  #include "target.h"
  
  #include <sys/types.h>
  #include <sys/ptrace.h>
  #include <machine/reg.h>
  
  #include "hppa-tdep.h"
  #include "inf-ptrace.h"
  
  #include "obsd-nat.h"
  
  static int
  hppaobsd_gregset_supplies_p (int regnum)
  {
    return (regnum >= HPPA_R0_REGNUM && regnum <= HPPA_CR27_REGNUM);
  }
  
  static int
  hppaobsd_fpregset_supplies_p (int regnum)
  {
    return (regnum >= HPPA_FP0_REGNUM && regnum <= HPPA_FP31R_REGNUM);
  }
  
  /* Supply the general-purpose registers stored in GREGS to REGCACHE.  */
  
  static void
  hppaobsd_supply_gregset (struct regcache *regcache, const void *gregs)
  {
    gdb_byte zero[4] = { 0 };
    const char *regs = gregs;
    int regnum;
  
    regcache_raw_supply (regcache, HPPA_R0_REGNUM, &zero);
    for (regnum = HPPA_R1_REGNUM; regnum <= HPPA_R31_REGNUM; regnum++)
      regcache_raw_supply (regcache, regnum, regs + regnum * 4);
  
    if (sizeof(struct reg) >= 46 * 4)
      {
        regcache_raw_supply (regcache, HPPA_IPSW_REGNUM, regs);
        regcache_raw_supply (regcache, HPPA_SAR_REGNUM, regs + 32 * 4);
        regcache_raw_supply (regcache, HPPA_PCSQ_HEAD_REGNUM, regs + 33 * 4);
        regcache_raw_supply (regcache, HPPA_PCSQ_TAIL_REGNUM, regs + 34 * 4);
        regcache_raw_supply (regcache, HPPA_PCOQ_HEAD_REGNUM, regs + 35 * 4);
        regcache_raw_supply (regcache, HPPA_PCOQ_TAIL_REGNUM, regs + 36 * 4);
        regcache_raw_supply (regcache, HPPA_SR0_REGNUM, regs + 37 * 4);
        regcache_raw_supply (regcache, HPPA_SR1_REGNUM, regs + 38 * 4);
        regcache_raw_supply (regcache, HPPA_SR2_REGNUM, regs + 39 * 4);
        regcache_raw_supply (regcache, HPPA_SR3_REGNUM, regs + 40 * 4);
        regcache_raw_supply (regcache, HPPA_SR4_REGNUM, regs + 41 * 4);
        regcache_raw_supply (regcache, HPPA_SR5_REGNUM, regs + 42 * 4);
        regcache_raw_supply (regcache, HPPA_SR6_REGNUM, regs + 43 * 4);
        regcache_raw_supply (regcache, HPPA_SR7_REGNUM, regs + 44 * 4);
        regcache_raw_supply (regcache, HPPA_CR26_REGNUM, regs + 45 * 4);
        regcache_raw_supply (regcache, HPPA_CR27_REGNUM, regs + 46 * 4);
      } 
    else
      {
        regcache_raw_supply (regcache, HPPA_SAR_REGNUM, regs);
        regcache_raw_supply (regcache, HPPA_PCOQ_HEAD_REGNUM, regs + 32 * 4);
        regcache_raw_supply (regcache, HPPA_PCOQ_TAIL_REGNUM, regs + 33 * 4);
      }
  }
  
  /* Supply the floating-point registers stored in FPREGS to REGCACHE.  */
  
  static void
  hppaobsd_supply_fpregset (struct regcache *regcache, const void *fpregs)
  {
    const char *regs = fpregs;
    int regnum;
  
    for (regnum = HPPA_FP0_REGNUM; regnum <= HPPA_FP31R_REGNUM;
         regnum += 2, regs += 8)
      {
        regcache_raw_supply (regcache, regnum, regs);
        regcache_raw_supply (regcache, regnum + 1, regs + 4);
      }
  }
  
  /* Collect the general-purpose registers from REGCACHE and store them
     in GREGS.  */
  
  static void
  hppaobsd_collect_gregset (const struct regcache *regcache,
  			  void *gregs, int regnum)
  {
    char *regs = gregs;
    int i;
  
    for (i = HPPA_R1_REGNUM; i <= HPPA_R31_REGNUM; i++)
      {
        if (regnum == -1 || regnum == i)
  	regcache_raw_collect (regcache, i, regs + i * 4);
      }
  
    if (sizeof(struct reg) >= 46 * 4)
      {
        if (regnum == -1 || regnum == HPPA_IPSW_REGNUM)
  	regcache_raw_collect (regcache, HPPA_IPSW_REGNUM, regs);
        if (regnum == -1 || regnum == HPPA_SAR_REGNUM)
  	regcache_raw_collect (regcache, HPPA_SAR_REGNUM, regs + 32 * 4);
        if (regnum == -1 || regnum == HPPA_PCSQ_HEAD_REGNUM)
  	regcache_raw_collect (regcache, HPPA_PCSQ_HEAD_REGNUM, regs + 33 * 4);
        if (regnum == -1 || regnum == HPPA_PCSQ_TAIL_REGNUM)
  	regcache_raw_collect (regcache, HPPA_PCSQ_TAIL_REGNUM, regs + 34 * 4);
        if (regnum == -1 || regnum == HPPA_PCOQ_HEAD_REGNUM)
  	regcache_raw_collect (regcache, HPPA_PCOQ_HEAD_REGNUM, regs + 35 * 4);
        if (regnum == -1 || regnum == HPPA_PCOQ_TAIL_REGNUM)
  	regcache_raw_collect (regcache, HPPA_PCOQ_TAIL_REGNUM, regs + 36 * 4);
        if (regnum == -1 || regnum == HPPA_SR0_REGNUM)
  	regcache_raw_collect (regcache, HPPA_SR0_REGNUM, regs + 37 * 4);
        if (regnum == -1 || regnum == HPPA_SR1_REGNUM)
  	regcache_raw_collect (regcache, HPPA_SR1_REGNUM, regs + 38 * 4);
        if (regnum == -1 || regnum == HPPA_SR2_REGNUM)
  	regcache_raw_collect (regcache, HPPA_SR2_REGNUM, regs + 39 * 4);
        if (regnum == -1 || regnum == HPPA_SR3_REGNUM)
  	regcache_raw_collect (regcache, HPPA_SR3_REGNUM, regs + 40 * 4);
        if (regnum == -1 || regnum == HPPA_SR4_REGNUM)
  	regcache_raw_collect (regcache, HPPA_SR4_REGNUM, regs + 41 * 4);
        if (regnum == -1 || regnum == HPPA_SR5_REGNUM)
  	regcache_raw_collect (regcache, HPPA_SR5_REGNUM, regs + 42 * 4);
        if (regnum == -1 || regnum == HPPA_SR6_REGNUM)
  	regcache_raw_collect (regcache, HPPA_SR6_REGNUM, regs + 43 * 4);
        if (regnum == -1 || regnum == HPPA_SR7_REGNUM)
  	regcache_raw_collect (regcache, HPPA_SR7_REGNUM, regs + 44 * 4);
        if (regnum == -1 || regnum == HPPA_CR26_REGNUM)
  	regcache_raw_collect (regcache, HPPA_CR26_REGNUM, regs + 45 * 4);
        if (regnum == -1 || regnum == HPPA_CR27_REGNUM)
  	regcache_raw_collect (regcache, HPPA_CR27_REGNUM, regs + 46 * 4);
      }
    else
      {
        if (regnum == -1 || regnum == HPPA_SAR_REGNUM)
  	regcache_raw_collect (regcache, HPPA_SAR_REGNUM, regs);
        if (regnum == -1 || regnum == HPPA_PCOQ_HEAD_REGNUM)
  	regcache_raw_collect (regcache, HPPA_PCOQ_HEAD_REGNUM, regs + 32 * 4);
        if (regnum == -1 || regnum == HPPA_PCOQ_TAIL_REGNUM)
  	regcache_raw_collect (regcache, HPPA_PCOQ_TAIL_REGNUM, regs + 33 * 4);
      }
  }
  
  /* Collect the floating-point registers from REGCACHE and store them
     in FPREGS.  */
  
  static void
  hppaobsd_collect_fpregset (struct regcache *regcache,
  			   void *fpregs, int regnum)
  {
    char *regs = fpregs;
    int i;
  
    for (i = HPPA_FP0_REGNUM; i <= HPPA_FP31R_REGNUM; i += 2, regs += 8)
      {
        if (regnum == -1 || regnum == i || regnum == i + 1)
  	{
  	  regcache_raw_collect (regcache, i, regs);
  	  regcache_raw_collect (regcache, i + 1, regs + 4);
  	}
      }
  }
  
  
  /* Fetch register REGNUM from the inferior.  If REGNUM is -1, do this
     for all registers (including the floating-point registers).  */
  
  static void
  hppaobsd_fetch_registers (struct target_ops *ops,
  			  struct regcache *regcache, int regnum)
  {
    if (regnum == -1 || hppaobsd_gregset_supplies_p (regnum))
      {
        struct reg regs;
  
        if (ptrace (PT_GETREGS, ptid_get_pid (inferior_ptid),
  		  (PTRACE_TYPE_ARG3) &regs, 0) == -1)
  	perror_with_name (_("Couldn't get registers"));
  
        hppaobsd_supply_gregset (regcache, &regs);
      }
  
    if (regnum == -1 || hppaobsd_fpregset_supplies_p (regnum))
      {
        struct fpreg fpregs;
  
        if (ptrace (PT_GETFPREGS, ptid_get_pid (inferior_ptid),
  		  (PTRACE_TYPE_ARG3) &fpregs, 0) == -1)
  	perror_with_name (_("Couldn't get floating point status"));
  
        hppaobsd_supply_fpregset (regcache, &fpregs);
      }
  }
  
  /* Store register REGNUM back into the inferior.  If REGNUM is -1, do
     this for all registers (including the floating-point registers).  */
  
  static void
  hppaobsd_store_registers (struct target_ops *ops,
  			  struct regcache *regcache, int regnum)
  {
    if (regnum == -1 || hppaobsd_gregset_supplies_p (regnum))
      {
        struct reg regs;
  
        if (ptrace (PT_GETREGS, ptid_get_pid (inferior_ptid),
                    (PTRACE_TYPE_ARG3) &regs, 0) == -1)
          perror_with_name (_("Couldn't get registers"));
  
        hppaobsd_collect_gregset (regcache, &regs, regnum);
  
        if (ptrace (PT_SETREGS, ptid_get_pid (inferior_ptid),
  	          (PTRACE_TYPE_ARG3) &regs, 0) == -1)
          perror_with_name (_("Couldn't write registers"));
      }
  
    if (regnum == -1 || hppaobsd_fpregset_supplies_p (regnum))
      {
        struct fpreg fpregs;
  
        if (ptrace (PT_GETFPREGS, ptid_get_pid (inferior_ptid),
  		  (PTRACE_TYPE_ARG3) &fpregs, 0) == -1)
  	perror_with_name (_("Couldn't get floating point status"));
  
        hppaobsd_collect_fpregset (regcache, &fpregs, regnum);
  
        if (ptrace (PT_SETFPREGS, ptid_get_pid (inferior_ptid),
  		  (PTRACE_TYPE_ARG3) &fpregs, 0) == -1)
  	perror_with_name (_("Couldn't write floating point status"));
      }
  }
  
  /* Provide a prototype to silence -Wmissing-prototypes.  */
  void _initialize_hppaobsd_nat (void);
  
  void
  _initialize_hppaobsd_nat (void)
  {
    struct target_ops *t;
  
    t = inf_ptrace_target ();
    t->to_fetch_registers = hppaobsd_fetch_registers;
    t->to_store_registers = hppaobsd_store_registers;
    obsd_add_target (t);
  }
  