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
  25 /* Description of the longjmp buffer.  */
  26 #define JB_PC 24
  27 #define JB_ELEMENT_SIZE INT_REGISTER_RAW_SIZE
  28
  29 /* For compatibility with previous implemenations of GDB on arm/NetBSD,
  30    override the default little-endian breakpoint.  */
  31 static const char arm_nbsd_arm_le_breakpoint[] = {0x11, 0x00, 0x00, 0xe6};
  32
  33 static int
  34 arm_netbsd_aout_in_solib_call_trampoline (CORE_ADDR pc, char *name)
  35 {
  36   if (strcmp (name, "_PROCEDURE_LINKAGE_TABLE_") == 0)
  37     return 1;
  38
  39   return 0;
  40 }
  41
  42 static void
  43 arm_netbsd_init_abi_common (struct gdbarch_info info,
  44                             struct gdbarch *gdbarch)
  45 {
  46   struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
  47
  48   tdep->lowest_pc = 0x8000;
  49   tdep->arm_breakpoint = arm_nbsd_arm_le_breakpoint;
  50   tdep->arm_breakpoint_size = sizeof (arm_nbsd_arm_le_breakpoint);
  51
  52   tdep->jb_pc = JB_PC;
  53   tdep->jb_elt_size = JB_ELEMENT_SIZE;
  54 }
  55
  56 static void
  57 arm_netbsd_aout_init_abi (struct gdbarch_info info,
  58                           struct gdbarch *gdbarch)
  59 {
  60   struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
  61
  62   arm_netbsd_init_abi_common (info, gdbarch);
  63
  64   set_gdbarch_in_solib_call_trampoline
  65     (gdbarch, arm_netbsd_aout_in_solib_call_trampoline);
  66   tdep->fp_model = ARM_FLOAT_SOFT;
  67 }
  68
  69 static void
  70 arm_netbsd_elf_init_abi (struct gdbarch_info info,
  71                          struct gdbarch *gdbarch)
  72 {
  73   struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
  74
  75   arm_netbsd_init_abi_common (info, gdbarch);
  76
  77   tdep->fp_model = ARM_FLOAT_SOFT_VFP;
  78 }
  79
  80 void
  81 _initialize_arm_netbsd_tdep (void)
  82 {
  83   arm_gdbarch_register_os_abi (ARM_ABI_NETBSD_AOUT, arm_netbsd_aout_init_abi);
  84   arm_gdbarch_register_os_abi (ARM_ABI_NETBSD_ELF, arm_netbsd_elf_init_abi);
  85 }