gdb/nbsd-tdep.c

   1 /* Common target-dependent code for NetBSD systems.
   2    Copyright (C) 2002 Free Software Foundation, Inc.
   3    Contributed by Wasabi Systems, 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 "gdb_string.h"
  24 #include "solib-svr4.h"
  25
  26 /* Fetch (and possibly build) an appropriate link_map_offsets
  27    structure for NetBSD targets using the struct offsets defined
  28    in <link.h> (but without actual reference to that file).
  29
  30    This makes it possible to access NetBSD shared libraries from a
  31    GDB that was not built on the same platform (for cross debugging).
  32
  33    We provide versions for ILP32 and LP64 NetBSD targets here.  */
  34
  35 struct link_map_offsets *
  36 nbsd_ilp32_solib_svr4_fetch_link_map_offsets (void)
  37 {
  38   static struct link_map_offsets lmo;
  39   static struct link_map_offsets *lmp = NULL;
  40
  41   if (lmp == NULL)
  42     {
  43       lmp = &lmo;
  44
  45       lmo.r_debug_size = 16;
  46
  47       lmo.r_map_offset = 4;
  48       lmo.r_map_size   = 4;
  49
  50       lmo.link_map_size = 20;
  51
  52       lmo.l_addr_offset = 0;
  53       lmo.l_addr_size   = 4;
  54
  55       lmo.l_name_offset = 4;
  56       lmo.l_name_size   = 4;
  57
  58       lmo.l_next_offset = 12;
  59       lmo.l_next_size   = 4;
  60
  61       lmo.l_prev_offset = 16;
  62       lmo.l_prev_size   = 4;
  63     }
  64
  65   return lmp;
  66 }
  67
  68 struct link_map_offsets *
  69 nbsd_lp64_solib_svr4_fetch_link_map_offsets (void)
  70 {
  71   static struct link_map_offsets lmo;
  72   static struct link_map_offsets *lmp = NULL;
  73
  74   if (lmp == NULL)
  75     {
  76       lmp = &lmo;
  77
  78       lmo.r_debug_size = 32;
  79
  80       lmo.r_map_offset = 8;
  81       lmo.r_map_size   = 8;
  82
  83       lmo.link_map_size = 40;
  84
  85       lmo.l_addr_offset = 0;
  86       lmo.l_addr_size   = 8;
  87
  88       lmo.l_name_offset = 8;
  89       lmo.l_name_size   = 8;
  90
  91       lmo.l_next_offset = 24;
  92       lmo.l_next_size   = 8;
  93
  94       lmo.l_prev_offset = 32;
  95       lmo.l_prev_size   = 8;
  96     }
  97
  98   return lmp;
  99 }
 100
 101 int
 102 nbsd_pc_in_sigtramp (CORE_ADDR pc, char *func_name)
 103 {
 104   /* Check for libc-provided signal trampoline.  All such trampolines
 105      have function names which begin with "__sigtramp".  */
 106
 107   return (func_name != NULL
 108           && strncmp (func_name, "__sigtramp", 10) == 0);
 109 }