gnu/dist/gdb6/gdb/hppaobsd-tdep.c

   1 /* Target-dependent code for OpenBSD/hppa
   2
   3    Copyright (C) 2004, 2005, 2006 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 "arch-utils.h"
  24 #include "symtab.h"
  25 #include "objfiles.h"
  26 #include "osabi.h"
  27 #include "regcache.h"
  28 #include "regset.h"
  29 #include "target.h"
  30 #include "value.h"
  31
  32 #include "gdb_assert.h"
  33 #include "gdb_string.h"
  34
  35 #include "elf/common.h"
  36
  37 #include "hppa-tdep.h"
  38 #include "solib-svr4.h"
  39
  40 /* Core file support.  */
  41
  42 /* Sizeof `struct reg' in <machine/reg.h>.  */
  43 #define HPPABSD_SIZEOF_GREGS    (34 * 4)
  44
  45 /* Supply register REGNUM from the buffer specified by GREGS and LEN
  46    in the general-purpose register set REGSET to register cache
  47    REGCACHE.  If REGNUM is -1, do this for all registers in REGSET.  */
  48
  49 static void
  50 hppabsd_supply_gregset (const struct regset *regset, struct regcache *regcache,
  51                      int regnum, const void *gregs, size_t len)
  52 {
  53   const gdb_byte *regs = gregs;
  54   size_t offset;
  55   int i;
  56
  57   gdb_assert (len >= HPPABSD_SIZEOF_GREGS);
  58
  59   for (i = HPPA_R1_REGNUM, offset = 4; i <= HPPA_R31_REGNUM; i++, offset += 4)
  60     {
  61       if (regnum == -1 || regnum == i)
  62         regcache_raw_supply (regcache, i, regs + offset);
  63     }
  64
  65   if (regnum == -1 || regnum == HPPA_SAR_REGNUM)
  66     regcache_raw_supply (regcache, HPPA_SAR_REGNUM, regs);
  67   if (regnum == -1 || regnum == HPPA_PCOQ_HEAD_REGNUM)
  68     regcache_raw_supply (regcache, HPPA_PCOQ_HEAD_REGNUM, regs + 32 * 4);
  69   if (regnum == -1 || regnum == HPPA_PCOQ_TAIL_REGNUM)
  70     regcache_raw_supply (regcache, HPPA_PCOQ_TAIL_REGNUM, regs + 33 * 4);
  71 }
  72
  73 /* OpenBSD/hppa register set.  */
  74
  75 static struct regset hppabsd_gregset =
  76 {
  77   NULL,
  78   hppabsd_supply_gregset
  79 };
  80
  81 /* Return the appropriate register set for the core section identified
  82    by SECT_NAME and SECT_SIZE.  */
  83
  84 static const struct regset *
  85 hppabsd_regset_from_core_section (struct gdbarch *gdbarch,
  86                                   const char *sect_name, size_t sect_size)
  87 {
  88   if (strcmp (sect_name, ".reg") == 0 && sect_size >= HPPABSD_SIZEOF_GREGS)
  89     return &hppabsd_gregset;
  90
  91   return NULL;
  92 }
  93 \f
  94
  95 void hppabsd_init_abi (struct gdbarch_info, struct gdbarch *);
  96
  97 void
  98 hppaobsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
  99 {
 100   /* Obviously OpenBSD is BSD-based.  */
 101   hppabsd_init_abi (info, gdbarch);
 102
 103   /* Core file support.  */
 104   set_gdbarch_regset_from_core_section
 105     (gdbarch, hppaobsd_regset_from_core_section);
 106
 107 }
 108 \f
 109
 110 /* OpenBSD uses uses the traditional NetBSD core file format, even for
 111    ports that use ELF.  */
 112 #define GDB_OSABI_NETBSD_CORE GDB_OSABI_OPENBSD_ELF
 113
 114 static enum gdb_osabi
 115 hppaobsd_core_osabi_sniffer (bfd *abfd)
 116 {
 117   if (strcmp (bfd_get_target (abfd), "netbsd-core") == 0)
 118     return GDB_OSABI_NETBSD_CORE;
 119
 120   return GDB_OSABI_UNKNOWN;
 121 }
 122 \f
 123
 124 /* Provide a prototype to silence -Wmissing-prototypes.  */
 125 void _initialize_hppabsd_tdep (void);
 126
 127 void
 128 _initialize_hppabsd_tdep (void)
 129 {
 130   /* BFD doesn't set a flavour for NetBSD style a.out core files.  */
 131   gdbarch_register_osabi_sniffer (bfd_arch_hppa, bfd_target_unknown_flavour,
 132                                   hppaobsd_core_osabi_sniffer);
 133
 134   gdbarch_register_osabi (bfd_arch_hppa, 0, GDB_OSABI_OPENBSD_ELF,
 135                           hppaobsd_init_abi);
 136 }