gdb/armnbsd-tdep.c

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