gdb/hppaobsd-tdep.c

   1 /* Target-dependent code for OpenBSD/hppa
   2
   3    Copyright (C) 2004, 2005, 2006, 2008 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 "osabi.h"
  24 #include "regcache.h"
  25 #include "regset.h"
  26
  27 #include "gdb_assert.h"
  28 #include "gdb_string.h"
  29
  30 #include "hppa-tdep.h"
  31
  32 /* Core file support.  */
  33
  34 /* Sizeof `struct reg' in <machine/reg.h>.  */
  35 #define HPPABSD_SIZEOF_GREGS    (34 * 4)
  36
  37 /* Supply register REGNUM from the buffer specified by GREGS and LEN
  38    in the general-purpose register set REGSET to register cache
  39    REGCACHE.  If REGNUM is -1, do this for all registers in REGSET.  */
  40
  41 static void
  42 hppabsd_supply_gregset (const struct regset *regset, struct regcache *regcache,
  43                      int regnum, const void *gregs, size_t len)
  44 {
  45   const gdb_byte *regs = gregs;
  46   size_t offset;
  47   int i;
  48
  49   gdb_assert (len >= HPPABSD_SIZEOF_GREGS);
  50
  51   for (i = HPPA_R1_REGNUM, offset = 4; i <= HPPA_R31_REGNUM; i++, offset += 4)
  52     {
  53       if (regnum == -1 || regnum == i)
  54         regcache_raw_supply (regcache, i, regs + offset);
  55     }
  56
  57   if (regnum == -1 || regnum == HPPA_SAR_REGNUM)
  58     regcache_raw_supply (regcache, HPPA_SAR_REGNUM, regs);
  59   if (regnum == -1 || regnum == HPPA_PCOQ_HEAD_REGNUM)
  60     regcache_raw_supply (regcache, HPPA_PCOQ_HEAD_REGNUM, regs + 32 * 4);
  61   if (regnum == -1 || regnum == HPPA_PCOQ_TAIL_REGNUM)
  62     regcache_raw_supply (regcache, HPPA_PCOQ_TAIL_REGNUM, regs + 33 * 4);
  63 }
  64
  65 /* OpenBSD/hppa register set.  */
  66
  67 static struct regset hppabsd_gregset =
  68 {
  69   NULL,
  70   hppabsd_supply_gregset
  71 };
  72
  73 /* Return the appropriate register set for the core section identified
  74    by SECT_NAME and SECT_SIZE.  */
  75
  76 static const struct regset *
  77 hppaobsd_regset_from_core_section (struct gdbarch *gdbarch,
  78                                   const char *sect_name, size_t sect_size)
  79 {
  80   if (strcmp (sect_name, ".reg") == 0 && sect_size >= HPPABSD_SIZEOF_GREGS)
  81     return &hppabsd_gregset;
  82
  83   return NULL;
  84 }
  85 \f
  86
  87 void hppabsd_init_abi (struct gdbarch_info, struct gdbarch *);
  88
  89 void
  90 hppaobsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
  91 {
  92   /* Obviously OpenBSD is BSD-based.  */
  93   hppabsd_init_abi (info, gdbarch);
  94
  95   /* Core file support.  */
  96   set_gdbarch_regset_from_core_section
  97     (gdbarch, hppaobsd_regset_from_core_section);
  98
  99 }
 100 \f
 101
 102 /* OpenBSD uses uses the traditional NetBSD core file format, even for
 103    ports that use ELF.  */
 104 #define GDB_OSABI_NETBSD_CORE GDB_OSABI_OPENBSD_ELF
 105
 106 static enum gdb_osabi
 107 hppaobsd_core_osabi_sniffer (bfd *abfd)
 108 {
 109   if (strcmp (bfd_get_target (abfd), "netbsd-core") == 0)
 110     return GDB_OSABI_NETBSD_CORE;
 111
 112   return GDB_OSABI_UNKNOWN;
 113 }
 114 \f
 115
 116 /* Provide a prototype to silence -Wmissing-prototypes.  */
 117 void _initialize_hppabsd_tdep (void);
 118
 119 void
 120 _initialize_hppabsd_tdep (void)
 121 {
 122   /* BFD doesn't set a flavour for NetBSD style a.out core files.  */
 123   gdbarch_register_osabi_sniffer (bfd_arch_hppa, bfd_target_unknown_flavour,
 124                                   hppaobsd_core_osabi_sniffer);
 125
 126   gdbarch_register_osabi (bfd_arch_hppa, 0, GDB_OSABI_OPENBSD_ELF,
 127                           hppaobsd_init_abi);
 128 }