gdb/armnbsd-tdep.c

   1 /* Target-specific functions for ARM running under NetBSD.
   2
   3    Copyright 2002, 2003, 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
  25 #include "gdb_string.h"
  26
  27 #include "arm-tdep.h"
  28 #include "nbsd-tdep.h"
  29 #include "solib-svr4.h"
  30
  31 /* Description of the longjmp buffer.  */
  32 #define ARM_NBSD_JB_PC 24
  33 #define ARM_NBSD_JB_ELEMENT_SIZE INT_REGISTER_SIZE
  34
  35 /* For compatibility with previous implemenations of GDB on arm/NetBSD,
  36    override the default little-endian breakpoint.  */
  37 static const char arm_nbsd_arm_le_breakpoint[] = {0x11, 0x00, 0x00, 0xe6};
  38
  39 static int
  40 arm_netbsd_aout_in_solib_call_trampoline (CORE_ADDR pc, char *name)
  41 {
  42   if (strcmp (name, "_PROCEDURE_LINKAGE_TABLE_") == 0)
  43     return 1;
  44
  45   return 0;
  46 }
  47
  48 static void
  49 arm_netbsd_init_abi_common (struct gdbarch_info info,
  50                             struct gdbarch *gdbarch)
  51 {
  52   struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
  53
  54   tdep->lowest_pc = 0x8000;
  55   tdep->arm_breakpoint = arm_nbsd_arm_le_breakpoint;
  56   tdep->arm_breakpoint_size = sizeof (arm_nbsd_arm_le_breakpoint);
  57
  58   tdep->jb_pc = ARM_NBSD_JB_PC;
  59   tdep->jb_elt_size = ARM_NBSD_JB_ELEMENT_SIZE;
  60 }
  61
  62 static void
  63 arm_netbsd_aout_init_abi (struct gdbarch_info info,
  64                           struct gdbarch *gdbarch)
  65 {
  66   struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
  67
  68   arm_netbsd_init_abi_common (info, gdbarch);
  69
  70   set_gdbarch_in_solib_call_trampoline
  71     (gdbarch, arm_netbsd_aout_in_solib_call_trampoline);
  72   tdep->fp_model = ARM_FLOAT_SOFT_FPA;
  73 }
  74
  75 static void
  76 arm_netbsd_elf_init_abi (struct gdbarch_info info,
  77                          struct gdbarch *gdbarch)
  78 {
  79   struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
  80
  81   arm_netbsd_init_abi_common (info, gdbarch);
  82
  83   set_solib_svr4_fetch_link_map_offsets (gdbarch,
  84                                 nbsd_ilp32_solib_svr4_fetch_link_map_offsets);
  85
  86   tdep->fp_model = ARM_FLOAT_SOFT_VFP;
  87 }
  88
  89 static enum gdb_osabi
  90 arm_netbsd_aout_osabi_sniffer (bfd *abfd)
  91 {
  92   if (strcmp (bfd_get_target (abfd), "a.out-arm-netbsd") == 0)
  93     return GDB_OSABI_NETBSD_AOUT;
  94
  95   return GDB_OSABI_UNKNOWN;
  96 }
  97
  98 void
  99 _initialize_arm_netbsd_tdep (void)
 100 {
 101   gdbarch_register_osabi_sniffer (bfd_arch_arm, bfd_target_aout_flavour,
 102                                   arm_netbsd_aout_osabi_sniffer);
 103
 104   gdbarch_register_osabi (bfd_arch_arm, 0, GDB_OSABI_NETBSD_AOUT,
 105                           arm_netbsd_aout_init_abi);
 106   gdbarch_register_osabi (bfd_arch_arm, 0, GDB_OSABI_NETBSD_ELF,
 107                           arm_netbsd_elf_init_abi);
 108 }