gdb/hppaobsd-tdep.c

   1 /* Target-dependent code for OpenBSD/hppa
   2
   3    Copyright (C) 2004, 2005, 2006, 2008, 2009 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 3 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, see <http://www.gnu.org/licenses/>.  */
  19
  20 #include "defs.h"
  21 #include "osabi.h"
  22 #include "regcache.h"
  23 #include "regset.h"
  24
  25 #include "gdb_assert.h"
  26 #include "gdb_string.h"
  27
  28 #include "hppa-tdep.h"
  29 #include "hppabsd-tdep.h"
  30
  31 /* Core file support.  */
  32
  33 /* Sizeof `struct reg' in <machine/reg.h>.  */
  34 #define HPPABSD_SIZEOF_GREGS    (34 * 4)
  35
  36 /* Supply register REGNUM from the buffer specified by GREGS and LEN
  37    in the general-purpose register set REGSET to register cache
  38    REGCACHE.  If REGNUM is -1, do this for all registers in REGSET.  */
  39
  40 static void
  41 hppabsd_supply_gregset (const struct regset *regset, struct regcache *regcache,
  42                      int regnum, const void *gregs, size_t len)
  43 {
  44   const gdb_byte *regs = gregs;
  45   size_t offset;
  46   int i;
  47
  48   gdb_assert (len >= HPPABSD_SIZEOF_GREGS);
  49
  50   for (i = HPPA_R1_REGNUM, offset = 4; i <= HPPA_R31_REGNUM; i++, offset += 4)
  51     {
  52       if (regnum == -1 || regnum == i)
  53         regcache_raw_supply (regcache, i, regs + offset);
  54     }
  55
  56   if (regnum == -1 || regnum == HPPA_SAR_REGNUM)
  57     regcache_raw_supply (regcache, HPPA_SAR_REGNUM, regs);
  58   if (regnum == -1 || regnum == HPPA_PCOQ_HEAD_REGNUM)
  59     regcache_raw_supply (regcache, HPPA_PCOQ_HEAD_REGNUM, regs + 32 * 4);
  60   if (regnum == -1 || regnum == HPPA_PCOQ_TAIL_REGNUM)
  61     regcache_raw_supply (regcache, HPPA_PCOQ_TAIL_REGNUM, regs + 33 * 4);
  62 }
  63
  64 /* OpenBSD/hppa register set.  */
  65
  66 static struct regset hppabsd_gregset =
  67 {
  68   NULL,
  69   hppabsd_supply_gregset
  70 };
  71
  72 /* Return the appropriate register set for the core section identified
  73    by SECT_NAME and SECT_SIZE.  */
  74
  75 static const struct regset *
  76 hppaobsd_regset_from_core_section (struct gdbarch *gdbarch,
  77                                   const char *sect_name, size_t sect_size)
  78 {
  79   if (strcmp (sect_name, ".reg") == 0 && sect_size >= HPPABSD_SIZEOF_GREGS)
  80     return &hppabsd_gregset;
  81
  82   return NULL;
  83 }
  84 \f
  85
  86 static void
  87 hppaobsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
  88 {
  89   /* Obviously OpenBSD is BSD-based.  */
  90   hppabsd_init_abi (info, gdbarch);
  91
  92   /* Core file support.  */
  93   set_gdbarch_regset_from_core_section
  94     (gdbarch, hppaobsd_regset_from_core_section);
  95
  96 }
  97 \f
  98
  99 /* OpenBSD uses uses the traditional NetBSD core file format, even for
 100    ports that use ELF.  */
 101 #define GDB_OSABI_NETBSD_CORE GDB_OSABI_OPENBSD_ELF
 102
 103 static enum gdb_osabi
 104 hppaobsd_core_osabi_sniffer (bfd *abfd)
 105 {
 106   if (strcmp (bfd_get_target (abfd), "netbsd-core") == 0)
 107     return GDB_OSABI_NETBSD_CORE;
 108
 109   return GDB_OSABI_UNKNOWN;
 110 }
 111 \f
 112
 113 /* Provide a prototype to silence -Wmissing-prototypes.  */
 114 void _initialize_hppabsd_tdep (void);
 115
 116 void
 117 _initialize_hppabsd_tdep (void)
 118 {
 119   /* BFD doesn't set a flavour for NetBSD style a.out core files.  */
 120   gdbarch_register_osabi_sniffer (bfd_arch_hppa, bfd_target_unknown_flavour,
 121                                   hppaobsd_core_osabi_sniffer);
 122
 123   gdbarch_register_osabi (bfd_arch_hppa, 0, GDB_OSABI_OPENBSD_ELF,
 124                           hppaobsd_init_abi);
 125 }