1/* Target-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 "arch-utils.h"
24#include "osabi.h"
25#include "regcache.h"
26#include "regset.h"
27
28#include "gdb_assert.h"
29#include "gdb_string.h"
30
31#include "hppa-tdep.h"
32#include "solib-svr4.h"
33
34/* Core file support.  */
35
36/* Sizeof `struct reg' in <machine/reg.h>.  */
37#define HPPABSD_SIZEOF_GREGS	(34 * 4)
38
39/* Supply register REGNUM from the buffer specified by GREGS and LEN
40   in the general-purpose register set REGSET to register cache
41   REGCACHE.  If REGNUM is -1, do this for all registers in REGSET.  */
42
43static void
44hppabsd_supply_gregset (const struct regset *regset, struct regcache *regcache,
45		     int regnum, const void *gregs, size_t len)
46{
47  const char *regs = gregs;
48  size_t offset;
49  int i;
50
51  gdb_assert (len >= HPPABSD_SIZEOF_GREGS);
52
53  for (i = HPPA_R1_REGNUM, offset = 4; i <= HPPA_R31_REGNUM; i++, offset += 4)
54    {
55      if (regnum == -1 || regnum == i)
56	regcache_raw_supply (regcache, i, regs + offset);
57    }
58
59  if (regnum == -1 || regnum == HPPA_SAR_REGNUM)
60    regcache_raw_supply (regcache, HPPA_SAR_REGNUM, regs);
61  if (regnum == -1 || regnum == HPPA_PCOQ_HEAD_REGNUM)
62    regcache_raw_supply (regcache, HPPA_PCOQ_HEAD_REGNUM, regs + 32 * 4);
63  if (regnum == -1 || regnum == HPPA_PCOQ_TAIL_REGNUM)
64    regcache_raw_supply (regcache, HPPA_PCOQ_TAIL_REGNUM, regs + 33 * 4);
65}
66
67/* OpenBSD/hppa register set.  */
68
69static struct regset hppabsd_gregset =
70{
71  NULL,
72  hppabsd_supply_gregset
73};
74
75/* Return the appropriate register set for the core section identified
76   by SECT_NAME and SECT_SIZE.  */
77
78static const struct regset *
79hppabsd_regset_from_core_section (struct gdbarch *gdbarch,
80				  const char *sect_name, size_t sect_size)
81{
82  if (strcmp (sect_name, ".reg") == 0 && sect_size >= HPPABSD_SIZEOF_GREGS)
83    return &hppabsd_gregset;
84
85  return NULL;
86}
87
88
89static void
90hppabsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
91{
92  struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
93
94  /* Core file support.  */
95  set_gdbarch_regset_from_core_section
96    (gdbarch, hppabsd_regset_from_core_section);
97
98  /* OpenBSD and NetBSD use ELF.  */
99  tdep->is_elf = 1;
100
101  /* OpenBSD and NetBSD uses SVR4-style shared libraries.  */
102  set_gdbarch_in_solib_call_trampoline
103    (gdbarch, generic_in_solib_call_trampoline);
104  set_solib_svr4_fetch_link_map_offsets
105    (gdbarch, svr4_ilp32_fetch_link_map_offsets);
106}
107
108
109/* OpenBSD uses uses the traditional NetBSD core file format, even for
110   ports that use ELF.  */
111#define GDB_OSABI_NETBSD_CORE GDB_OSABI_OPENBSD_ELF
112
113static enum gdb_osabi
114hppabsd_core_osabi_sniffer (bfd *abfd)
115{
116  if (strcmp (bfd_get_target (abfd), "netbsd-core") == 0)
117    return GDB_OSABI_NETBSD_CORE;
118
119  return GDB_OSABI_UNKNOWN;
120}
121
122
123/* Provide a prototype to silence -Wmissing-prototypes.  */
124void _initialize_hppabsd_tdep (void);
125
126void
127_initialize_hppabsd_tdep (void)
128{
129  /* BFD doesn't set a flavour for NetBSD style a.out core files.  */
130  gdbarch_register_osabi_sniffer (bfd_arch_hppa, bfd_target_unknown_flavour,
131				  hppabsd_core_osabi_sniffer);
132
133  gdbarch_register_osabi (bfd_arch_hppa, 0, GDB_OSABI_NETBSD_ELF,
134			  hppabsd_init_abi);
135  gdbarch_register_osabi (bfd_arch_hppa, 0, GDB_OSABI_OPENBSD_ELF,
136			  hppabsd_init_abi);
137}
138