gdb/sparc64-linux-tdep.c

   1 /* Target-dependent code for GNU/Linux UltraSPARC.
   2
   3    Copyright 2003 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 "gdbarch.h"
  24 #include "osabi.h"
  25 #include "solib-svr4.h"
  26
  27 #include "sparc64-tdep.h"
  28
  29 static struct link_map_offsets *
  30 sparc64_linux_svr4_fetch_link_map_offsets (void)
  31 {
  32   static struct link_map_offsets lmo;
  33   static struct link_map_offsets *lmp = NULL;
  34
  35   if (lmp == NULL)
  36     {
  37       lmp = &lmo;
  38
  39       /* Everything we need is in the first 16 bytes.  */
  40       lmo.r_debug_size = 16;
  41       lmo.r_map_offset = 8;
  42       lmo.r_map_size   = 8;
  43
  44       /* Everything we need is in the first 40 bytes.  */
  45       lmo.link_map_size = 40;
  46       lmo.l_addr_offset = 0;
  47       lmo.l_addr_size   = 8;
  48       lmo.l_name_offset = 8;
  49       lmo.l_name_size   = 8;
  50       lmo.l_next_offset = 24;
  51       lmo.l_next_size   = 8;
  52       lmo.l_prev_offset = 32;
  53       lmo.l_prev_size   = 8;
  54     }
  55
  56   return lmp;
  57 }
  58
  59 static void
  60 sparc64_linux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
  61 {
  62   struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
  63
  64   /* GNU/Linux is very similar to Solaris ...  */
  65   sparc64_sol2_init_abi (info, gdbarch);
  66
  67   /* ... but doesn't have kernel-assisted single-stepping support.  */
  68   set_gdbarch_software_single_step (gdbarch, sparc_software_single_step);
  69
  70   set_solib_svr4_fetch_link_map_offsets
  71     (gdbarch, sparc64_linux_svr4_fetch_link_map_offsets);
  72 }
  73
  74 /* Provide a prototype to silence -Wmissing-prototypes.  */
  75 extern void _initialize_sparc64_linux_tdep (void);
  76
  77 void
  78 _initialize_sparc64_linux_tdep (void)
  79 {
  80   gdbarch_register_osabi (bfd_arch_sparc, bfd_mach_sparc_v9,
  81                           GDB_OSABI_LINUX, sparc64_linux_init_abi);
  82 }