gdb/armnbsd-tdep.c - gdb

Global variables defined

Functions defined

Macros defined

Source code

  1. /* Target-dependent code for NetBSD/arm.

  3.    Copyright (C) 2002-2015 Free Software Foundation, Inc.

  5.    This file is part of GDB.

  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 3 of the License, or
  10.    (at your option) any later version.

  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.

  17.    You should have received a copy of the GNU General Public License
  18.    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */

  20. #include "defs.h"
  21. #include "osabi.h"

  23. #include "arm-tdep.h"
  24. #include "solib-svr4.h"

  26. /* Description of the longjmp buffer.  */
  27. ‌#define ARM_NBSD_JB_PC 24
  28. ‌#define ARM_NBSD_JB_ELEMENT_SIZE INT_REGISTER_SIZE

  30. /* For compatibility with previous implemenations of GDB on arm/NetBSD,
  31.    override the default little-endian breakpoint.  */
  32. ‌static const gdb_byte arm_nbsd_arm_le_breakpoint[] = {0x11, 0x00, 0x00, 0xe6};
  33. ‌static const gdb_byte arm_nbsd_arm_be_breakpoint[] = {0xe6, 0x00, 0x00, 0x11};
  34. ‌static const gdb_byte arm_nbsd_thumb_le_breakpoint[] = {0xfe, 0xde};
  35. ‌static const gdb_byte arm_nbsd_thumb_be_breakpoint[] = {0xde, 0xfe};

  37. static void
  38. ‌arm_netbsd_init_abi_common (struct gdbarch_info info,
  39.                             struct gdbarch *gdbarch)
  40. {
  41.   struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);

  43.   tdep->lowest_pc = 0x8000;
  44.   switch (info.byte_order)
  45.     {
  46.     case BFD_ENDIAN_LITTLE:
  47.       tdep->arm_breakpoint = arm_nbsd_arm_le_breakpoint;
  48.       tdep->thumb_breakpoint = arm_nbsd_thumb_le_breakpoint;
  49.       tdep->arm_breakpoint_size = sizeof (arm_nbsd_arm_le_breakpoint);
  50.       tdep->thumb_breakpoint_size = sizeof (arm_nbsd_thumb_le_breakpoint);
  51.       break;

  53.     case BFD_ENDIAN_BIG:
  54.       tdep->arm_breakpoint = arm_nbsd_arm_be_breakpoint;
  55.       tdep->thumb_breakpoint = arm_nbsd_thumb_be_breakpoint;
  56.       tdep->arm_breakpoint_size = sizeof (arm_nbsd_arm_be_breakpoint);
  57.       tdep->thumb_breakpoint_size = sizeof (arm_nbsd_thumb_be_breakpoint);
  58.       break;

  60.     default:
  61.       internal_error (__FILE__, __LINE__,
  62.                       _("arm_gdbarch_init: bad byte order for float format"));
  63.     }

  65.   tdep->jb_pc = ARM_NBSD_JB_PC;
  66.   tdep->jb_elt_size = ARM_NBSD_JB_ELEMENT_SIZE;

  68.   /* Single stepping.  */
  69.   set_gdbarch_software_single_step (gdbarch, arm_software_single_step);
  70. }

  72. static void
  73. ‌arm_netbsd_aout_init_abi (struct gdbarch_info info,
  74.                           struct gdbarch *gdbarch)
  75. {
  76.   struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);

  78.   arm_netbsd_init_abi_common (info, gdbarch);
  79.   if (tdep->fp_model == ARM_FLOAT_AUTO)
  80.     tdep->fp_model = ARM_FLOAT_SOFT_FPA;
  81. }

  83. static void
  84. ‌arm_netbsd_elf_init_abi (struct gdbarch_info info,
  85.                          struct gdbarch *gdbarch)
  86. {
  87.   struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);

  89.   arm_netbsd_init_abi_common (info, gdbarch);
  90.   if (tdep->fp_model == ARM_FLOAT_AUTO)
  91.     tdep->fp_model = ARM_FLOAT_SOFT_VFP;

  93.   /* NetBSD ELF uses SVR4-style shared libraries.  */
  94.   set_solib_svr4_fetch_link_map_offsets
  95.     (gdbarch, svr4_ilp32_fetch_link_map_offsets);
  96. }

  98. static enum gdb_osabi
  99. ‌arm_netbsd_aout_osabi_sniffer (bfd *abfd)
  100. {
  101.   if (strcmp (bfd_get_target (abfd), "a.out-arm-netbsd") == 0)
  102.     return GDB_OSABI_NETBSD_AOUT;

  104.   return GDB_OSABI_UNKNOWN;
  105. }

  107. /* Provide a prototype to silence -Wmissing-prototypes.  */
  108. extern initialize_file_ftype _initialize_arm_netbsd_tdep;

  110. void
  111. ‌_initialize_arm_netbsd_tdep (void)
  112. {
  113.   gdbarch_register_osabi_sniffer (bfd_arch_arm, bfd_target_aout_flavour,
  114.                                   arm_netbsd_aout_osabi_sniffer);

  116.   gdbarch_register_osabi (bfd_arch_arm, 0, GDB_OSABI_NETBSD_AOUT,
  117.                           arm_netbsd_aout_init_abi);
  118.   gdbarch_register_osabi (bfd_arch_arm, 0, GDB_OSABI_NETBSD_ELF,
  119.                           arm_netbsd_elf_init_abi);
  120. }