gdb/hppabsd-tdep.c

   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
  43 static void
  44 hppabsd_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
  69 static 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
  78 static const struct regset *
  79 hppabsd_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 \f
  88
  89 static void
  90 hppabsd_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_solib_svr4_fetch_link_map_offsets
 103     (gdbarch, svr4_ilp32_fetch_link_map_offsets);
 104 }
 105 \f
 106
 107 /* OpenBSD uses uses the traditional NetBSD core file format, even for
 108    ports that use ELF.  */
 109 #define GDB_OSABI_NETBSD_CORE GDB_OSABI_OPENBSD_ELF
 110
 111 static enum gdb_osabi
 112 hppabsd_core_osabi_sniffer (bfd *abfd)
 113 {
 114   if (strcmp (bfd_get_target (abfd), "netbsd-core") == 0)
 115     return GDB_OSABI_NETBSD_CORE;
 116
 117   return GDB_OSABI_UNKNOWN;
 118 }
 119 \f
 120
 121 /* Provide a prototype to silence -Wmissing-prototypes.  */
 122 void _initialize_hppabsd_tdep (void);
 123
 124 void
 125 _initialize_hppabsd_tdep (void)
 126 {
 127   /* BFD doesn't set a flavour for NetBSD style a.out core files.  */
 128   gdbarch_register_osabi_sniffer (bfd_arch_hppa, bfd_target_unknown_flavour,
 129                                   hppabsd_core_osabi_sniffer);
 130
 131   gdbarch_register_osabi (bfd_arch_hppa, 0, GDB_OSABI_NETBSD_ELF,
 132                           hppabsd_init_abi);
 133   gdbarch_register_osabi (bfd_arch_hppa, 0, GDB_OSABI_OPENBSD_ELF,
 134                           hppabsd_init_abi);
 135 }