/* Target-dependent code for HP PA-RISC BSD's.

   Copyright 2004 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 2 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, write to the Free Software
   Foundation, Inc., 59 Temple Place - Suite 330,
   Boston, MA 02111-1307, USA.  */

#include "defs.h"
#include "arch-utils.h"
#include "osabi.h"
#include "regcache.h"
#include "regset.h"

#include "gdb_assert.h"
#include "gdb_string.h"

#include "hppa-tdep.h"
#include "solib-svr4.h"

/* Core file support.  */

/* Sizeof `struct reg' in <machine/reg.h>.  */
#define HPPABSD_SIZEOF_GREGS	(46 * 4)

/* Sizeof `struct fpreg' in <machine/reg.h.  */
#define HPPABSD_SIZEOF_FPREGS	(32 * 8)

/* Supply register REGNUM from the buffer specified by GREGS and LEN
   in the general-purpose register set REGSET to register cache
   REGCACHE.  If REGNUM is -1, do this for all registers in REGSET.  */

static void
hppabsd_supply_gregset (const struct regset *regset, struct regcache *regcache,
		     int regnum, const void *gregs, size_t len)
{
  const char *regs = gregs;
  size_t offset;
  int i;

  gdb_assert (len >= HPPABSD_SIZEOF_GREGS);

  for (i = HPPA_R1_REGNUM, offset = 4; i <= HPPA_R31_REGNUM; i++, offset += 4)
    {
      if (regnum == -1 || regnum == i)
	regcache_raw_supply (regcache, i, regs + offset);
    }

  if (regnum == -1 || regnum == HPPA_IPSW_REGNUM)
    regcache_raw_supply (regcache, HPPA_IPSW_REGNUM, regs);
  if (regnum == -1 || regnum == HPPA_SAR_REGNUM)
    regcache_raw_supply (regcache, HPPA_SAR_REGNUM, regs + 32 * 4);
  if (regnum == -1 || regnum == HPPA_PCSQ_HEAD_REGNUM)
    regcache_raw_supply (regcache, HPPA_PCSQ_HEAD_REGNUM, regs + 33 * 4);
  if (regnum == -1 || regnum == HPPA_PCSQ_TAIL_REGNUM)
    regcache_raw_supply (regcache, HPPA_PCSQ_TAIL_REGNUM, regs + 34 * 4);
  if (regnum == -1 || regnum == HPPA_PCOQ_HEAD_REGNUM)
    regcache_raw_supply (regcache, HPPA_PCOQ_HEAD_REGNUM, regs + 35 * 4);
  if (regnum == -1 || regnum == HPPA_PCOQ_TAIL_REGNUM)
    regcache_raw_supply (regcache, HPPA_PCOQ_TAIL_REGNUM, regs + 36 * 4);
  if (regnum == -1 || regnum == HPPA_SR0_REGNUM)
    regcache_raw_supply (regcache, HPPA_SR0_REGNUM, regs + 37 * 4);
  if (regnum == -1 || regnum == HPPA_SR1_REGNUM)
    regcache_raw_supply (regcache, HPPA_SR1_REGNUM, regs + 38 * 4);
  if (regnum == -1 || regnum == HPPA_SR2_REGNUM)
    regcache_raw_supply (regcache, HPPA_SR2_REGNUM, regs + 39 * 4);
  if (regnum == -1 || regnum == HPPA_SR3_REGNUM)
    regcache_raw_supply (regcache, HPPA_SR3_REGNUM, regs + 40 * 4);
  if (regnum == -1 || regnum == HPPA_SR4_REGNUM)
    regcache_raw_supply (regcache, HPPA_SR4_REGNUM, regs + 41 * 4);
  if (regnum == -1 || regnum == HPPA_SR5_REGNUM)
    regcache_raw_supply (regcache, HPPA_SR5_REGNUM, regs + 42 * 4);
  if (regnum == -1 || regnum == HPPA_SR6_REGNUM)
    regcache_raw_supply (regcache, HPPA_SR6_REGNUM, regs + 43 * 4);
  if (regnum == -1 || regnum == HPPA_SR7_REGNUM)
    regcache_raw_supply (regcache, HPPA_SR7_REGNUM, regs + 44 * 4);
  if (regnum == -1 || regnum == HPPA_CR26_REGNUM)
    regcache_raw_supply (regcache, HPPA_CR26_REGNUM, regs + 45 * 4);
  if (regnum == -1 || regnum == HPPA_CR27_REGNUM)
    regcache_raw_supply (regcache, HPPA_CR27_REGNUM, regs + 46 * 4);
}

/* Supply register REGNUM from the buffer specified by FPREGS and LEN
   in the floating-point register set REGSET to register cache
   REGCACHE.  If REGNUM is -1, do this for all registers in REGSET.  */

static void
hppabsd_supply_fpregset (const struct regset *regset,
			 struct regcache *regcache,
			 int regnum, const void *fpregs, size_t len)
{
  const char *regs = fpregs;
  int i;

  gdb_assert (len >= HPPABSD_SIZEOF_FPREGS);

  for (i = HPPA_FP0_REGNUM; i < HPPA_FP0_REGNUM + 32 * 2; i++)
    {
      if (regnum == i || regnum == -1)
	regcache_raw_supply (regcache, i, regs + (i - HPPA_FP0_REGNUM) * 4);
    }
}

/* OpenBSD/hppa register sets.  */

static struct regset hppabsd_gregset =
{
  NULL,
  hppabsd_supply_gregset
};

static struct regset hppabsd_fpregset =
{
  NULL,
  hppabsd_supply_fpregset
};

/* Return the appropriate register set for the core section identified
   by SECT_NAME and SECT_SIZE.  */

static const struct regset *
hppabsd_regset_from_core_section (struct gdbarch *gdbarch,
				  const char *sect_name, size_t sect_size)
{
  if (strcmp (sect_name, ".reg") == 0 && sect_size >= HPPABSD_SIZEOF_GREGS)
    return &hppabsd_gregset;

  if (strcmp (sect_name, ".reg2") == 0 && sect_size >= HPPABSD_SIZEOF_FPREGS)
    return &hppabsd_fpregset;

  return NULL;
}


static void
hppabsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
{
  struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);

  /* Core file support.  */
  set_gdbarch_regset_from_core_section
    (gdbarch, hppabsd_regset_from_core_section);

  /* OpenBSD and NetBSD use ELF.  */
  tdep->is_elf = 1;

  /* OpenBSD and NetBSD uses SVR4-style shared libraries.  */
  set_gdbarch_in_solib_call_trampoline
    (gdbarch, generic_in_solib_call_trampoline);
  set_solib_svr4_fetch_link_map_offsets
    (gdbarch, svr4_ilp32_fetch_link_map_offsets);
}


/* OpenBSD uses uses the traditional NetBSD core file format, even for
   ports that use ELF.  */
#define GDB_OSABI_NETBSD_CORE GDB_OSABI_OPENBSD_ELF

static enum gdb_osabi
hppabsd_core_osabi_sniffer (bfd *abfd)
{
  if (strcmp (bfd_get_target (abfd), "netbsd-core") == 0)
    return GDB_OSABI_NETBSD_CORE;

  return GDB_OSABI_UNKNOWN;
}


/* Provide a prototype to silence -Wmissing-prototypes.  */
void _initialize_hppabsd_tdep (void);

void
_initialize_hppabsd_tdep (void)
{
  /* BFD doesn't set a flavour for NetBSD style a.out core files.  */
  gdbarch_register_osabi_sniffer (bfd_arch_hppa, bfd_target_unknown_flavour,
				  hppabsd_core_osabi_sniffer);

  gdbarch_register_osabi (bfd_arch_hppa, 0, GDB_OSABI_NETBSD_ELF,
			  hppabsd_init_abi);
  gdbarch_register_osabi (bfd_arch_hppa, 0, GDB_OSABI_OPENBSD_ELF,
			  hppabsd_init_abi);
}