gdb/mips64obsd-tdep.c

   1 /* Target-dependent code for OpenBSD/mips64.
   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 "osabi.h"
  24 #include "regcache.h"
  25 #include "regset.h"
  26
  27 #include "gdb_string.h"
  28
  29 #include "mips-tdep.h"
  30 #include "solib-svr4.h"
  31
  32 #define MIPS64OBSD_NUM_REGS 73
  33
  34 /* Core file support.  */
  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 mips64obsd_supply_gregset (const struct regset *regset,
  42                            struct regcache *regcache, int regnum,
  43                            const void *gregs, size_t len)
  44 {
  45   const char *regs = gregs;
  46   int i;
  47
  48   for (i = 0; i < MIPS64OBSD_NUM_REGS; i++)
  49     {
  50       if (regnum == i || regnum == -1)
  51         regcache_raw_supply (regcache, i, regs + i * 8);
  52     }
  53 }
  54
  55 /* OpenBSD/mips64 register set.  */
  56
  57 static struct regset mips64obsd_gregset =
  58 {
  59   NULL,
  60   mips64obsd_supply_gregset
  61 };
  62
  63 /* Return the appropriate register set for the core section identified
  64    by SECT_NAME and SECT_SIZE.  */
  65
  66 static const struct regset *
  67 mips64obsd_regset_from_core_section (struct gdbarch *gdbarch,
  68                                      const char *sect_name, size_t sect_size)
  69 {
  70   if (strcmp (sect_name, ".reg") == 0 && sect_size >= MIPS64OBSD_NUM_REGS * 8)
  71     return &mips64obsd_gregset;
  72
  73   return NULL;
  74 }
  75 \f
  76
  77 static void
  78 mips64obsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
  79 {
  80   set_gdbarch_regset_from_core_section
  81     (gdbarch, mips64obsd_regset_from_core_section);
  82
  83   set_gdbarch_software_single_step (gdbarch, mips_software_single_step);
  84
  85   set_solib_svr4_fetch_link_map_offsets
  86     (gdbarch, svr4_lp64_fetch_link_map_offsets);
  87 }
  88
  89 \f
  90 /* Provide a prototype to silence -Wmissing-prototypes.  */
  91 void _initialize_mips64obsd_tdep (void);
  92
  93 void
  94 _initialize_mips64obsd_tdep (void)
  95 {
  96   gdbarch_register_osabi (bfd_arch_mips, 0, GDB_OSABI_OPENBSD_ELF,
  97                           mips64obsd_init_abi);
  98 }