gdb/arm-wince-tdep.c

   1 /* Target-dependent code for Windows CE running on ARM processors,
   2    for GDB.
   3
   4    Copyright (C) 2007 Free Software Foundation, Inc.
   5
   6    This file is part of GDB.
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 2 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program; if not, write to the Free Software
  20    Foundation, Inc., 51 Franklin Street, Fifth Floor,
  21    Boston, MA 02110-1301, USA.  */
  22
  23 #include "defs.h"
  24 #include "osabi.h"
  25 #include "solib-svr4.h"
  26 #include "target.h"
  27
  28 #include "gdb_string.h"
  29
  30 #include "arm-tdep.h"
  31
  32 static const char arm_wince_le_breakpoint[] = { 0x10, 0x00, 0x00, 0xe6 };
  33 static const char arm_wince_thumb_le_breakpoint[] = { 0xfe, 0xdf };
  34
  35 /* Description of the longjmp buffer.  */
  36 #define ARM_WINCE_JB_ELEMENT_SIZE       INT_REGISTER_SIZE
  37 #define ARM_WINCE_JB_PC                 21
  38
  39 static void
  40 arm_wince_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
  41 {
  42   struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
  43
  44   tdep->arm_breakpoint = arm_wince_le_breakpoint;
  45   tdep->arm_breakpoint_size = sizeof (arm_wince_le_breakpoint);
  46   tdep->thumb_breakpoint = arm_wince_thumb_le_breakpoint;
  47   tdep->thumb_breakpoint_size = sizeof (arm_wince_thumb_le_breakpoint);
  48   tdep->struct_return = pcc_struct_return;
  49
  50   tdep->fp_model = ARM_FLOAT_SOFT_VFP;
  51
  52   tdep->jb_pc = ARM_WINCE_JB_PC;
  53   tdep->jb_elt_size = ARM_WINCE_JB_ELEMENT_SIZE;
  54
  55   /* On ARM WinCE char defaults to signed.  */
  56   set_gdbarch_char_signed (gdbarch, 1);
  57
  58   set_solib_svr4_fetch_link_map_offsets
  59     (gdbarch, svr4_ilp32_fetch_link_map_offsets);
  60
  61   /* Shared library handling.  */
  62   set_gdbarch_skip_trampoline_code (gdbarch, find_solib_trampoline_target);
  63
  64   /* Single stepping.  */
  65   set_gdbarch_software_single_step (gdbarch, arm_software_single_step);
  66 }
  67
  68 static enum gdb_osabi
  69 arm_wince_osabi_sniffer (bfd *abfd)
  70 {
  71   const char *target_name = bfd_get_target (abfd);
  72
  73   if (strcmp (target_name, "pei-arm-wince-little") == 0)
  74     return GDB_OSABI_WINCE;
  75
  76   return GDB_OSABI_UNKNOWN;
  77 }
  78
  79 /* Provide a prototype to silence -Wmissing-prototypes.  */
  80 void _initialize_arm_wince_tdep (void);
  81
  82 void
  83 _initialize_arm_wince_tdep (void)
  84 {
  85   gdbarch_register_osabi_sniffer (bfd_arch_arm, bfd_target_coff_flavour,
  86                                   arm_wince_osabi_sniffer);
  87
  88   gdbarch_register_osabi (bfd_arch_arm, 0, GDB_OSABI_WINCE,
  89                           arm_wince_init_abi);
  90 }