gdb/armnbsd-tdep.c

   1 /* Target-specific functions for ARM running under NetBSD.
   2    Copyright 2002, 2003 Free Software Foundation, Inc.
   3
   4    This file is part of GDB.
   5
   6    This program is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 2 of the License, or
   9    (at your option) any later version.
  10
  11    This program is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with this program; if not, write to the Free Software
  18    Foundation, Inc., 59 Temple Place - Suite 330,
  19    Boston, MA 02111-1307, USA.  */
  20
  21 #include "defs.h"
  22 #include "osabi.h"
  23
  24 #include "arm-tdep.h"
  25 #include "nbsd-tdep.h"
  26 #include "solib-svr4.h"
  27
  28 /* Description of the longjmp buffer.  */
  29 #define ARM_NBSD_JB_PC 24
  30 #define ARM_NBSD_JB_ELEMENT_SIZE INT_REGISTER_SIZE
  31
  32 /* For compatibility with previous implemenations of GDB on arm/NetBSD,
  33    override the default little-endian breakpoint.  */
  34 static const char arm_nbsd_arm_le_breakpoint[] = {0x11, 0x00, 0x00, 0xe6};
  35
  36 static int
  37 arm_netbsd_aout_in_solib_call_trampoline (CORE_ADDR pc, char *name)
  38 {
  39   if (strcmp (name, "_PROCEDURE_LINKAGE_TABLE_") == 0)
  40     return 1;
  41
  42   return 0;
  43 }
  44
  45 static void
  46 arm_netbsd_init_abi_common (struct gdbarch_info info,
  47                             struct gdbarch *gdbarch)
  48 {
  49   struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
  50
  51   tdep->lowest_pc = 0x8000;
  52   tdep->arm_breakpoint = arm_nbsd_arm_le_breakpoint;
  53   tdep->arm_breakpoint_size = sizeof (arm_nbsd_arm_le_breakpoint);
  54
  55   tdep->jb_pc = ARM_NBSD_JB_PC;
  56   tdep->jb_elt_size = ARM_NBSD_JB_ELEMENT_SIZE;
  57 }
  58
  59 static void
  60 arm_netbsd_aout_init_abi (struct gdbarch_info info,
  61                           struct gdbarch *gdbarch)
  62 {
  63   struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
  64
  65   arm_netbsd_init_abi_common (info, gdbarch);
  66
  67   set_gdbarch_in_solib_call_trampoline
  68     (gdbarch, arm_netbsd_aout_in_solib_call_trampoline);
  69   tdep->fp_model = ARM_FLOAT_SOFT_FPA;
  70 }
  71
  72 static void
  73 arm_netbsd_elf_init_abi (struct gdbarch_info info,
  74                          struct gdbarch *gdbarch)
  75 {
  76   struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
  77
  78   arm_netbsd_init_abi_common (info, gdbarch);
  79
  80   set_solib_svr4_fetch_link_map_offsets (gdbarch,
  81                                 nbsd_ilp32_solib_svr4_fetch_link_map_offsets);
  82
  83   tdep->fp_model = ARM_FLOAT_SOFT_VFP;
  84 }
  85
  86 static enum gdb_osabi
  87 arm_netbsd_aout_osabi_sniffer (bfd *abfd)
  88 {
  89   if (strcmp (bfd_get_target (abfd), "a.out-arm-netbsd") == 0)
  90     return GDB_OSABI_NETBSD_AOUT;
  91
  92   return GDB_OSABI_UNKNOWN;
  93 }
  94
  95 void
  96 _initialize_arm_netbsd_tdep (void)
  97 {
  98   gdbarch_register_osabi_sniffer (bfd_arch_arm, bfd_target_aout_flavour,
  99                                   arm_netbsd_aout_osabi_sniffer);
 100
 101   gdbarch_register_osabi (bfd_arch_arm, 0, GDB_OSABI_NETBSD_AOUT,
 102                           arm_netbsd_aout_init_abi);
 103   gdbarch_register_osabi (bfd_arch_arm, 0, GDB_OSABI_NETBSD_ELF,
 104                           arm_netbsd_elf_init_abi);
 105 }