1 files changed, 121 insertions, 0 deletions
diff --git a/gdb/arm-nbsd-tdep.c b/gdb/arm-nbsd-tdep.c
new file mode 100644
index 0000000..259853c
--- /dev/null
+++ b/gdb/arm-nbsd-tdep.c
@@ -0,0 +1,121 @@
+/* Target-dependent code for NetBSD/arm.
+
+   Copyright (C) 2002-2016 Free Software Foundation, Inc.
+
+   This file is part of GDB.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
+
+#include "defs.h"
+#include "osabi.h"
+
+#include "arch/arm.h"
+#include "arm-tdep.h"
+#include "solib-svr4.h"
+
+/* Description of the longjmp buffer.  */
+#define ARM_NBSD_JB_PC 24
+#define ARM_NBSD_JB_ELEMENT_SIZE INT_REGISTER_SIZE
+
+/* For compatibility with previous implemenations of GDB on arm/NetBSD,
+   override the default little-endian breakpoint.  */
+static const gdb_byte arm_nbsd_arm_le_breakpoint[] = {0x11, 0x00, 0x00, 0xe6};
+static const gdb_byte arm_nbsd_arm_be_breakpoint[] = {0xe6, 0x00, 0x00, 0x11};
+static const gdb_byte arm_nbsd_thumb_le_breakpoint[] = {0xfe, 0xde};
+static const gdb_byte arm_nbsd_thumb_be_breakpoint[] = {0xde, 0xfe};
+
+static void
+arm_netbsd_init_abi_common (struct gdbarch_info info,
+			    struct gdbarch *gdbarch)
+{
+  struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
+
+  tdep->lowest_pc = 0x8000;
+  switch (info.byte_order)
+    {
+    case BFD_ENDIAN_LITTLE:
+      tdep->arm_breakpoint = arm_nbsd_arm_le_breakpoint;
+      tdep->thumb_breakpoint = arm_nbsd_thumb_le_breakpoint;
+      tdep->arm_breakpoint_size = sizeof (arm_nbsd_arm_le_breakpoint);
+      tdep->thumb_breakpoint_size = sizeof (arm_nbsd_thumb_le_breakpoint);
+      break;
+
+    case BFD_ENDIAN_BIG:
+      tdep->arm_breakpoint = arm_nbsd_arm_be_breakpoint;
+      tdep->thumb_breakpoint = arm_nbsd_thumb_be_breakpoint;
+      tdep->arm_breakpoint_size = sizeof (arm_nbsd_arm_be_breakpoint);
+      tdep->thumb_breakpoint_size = sizeof (arm_nbsd_thumb_be_breakpoint);
+      break;
+
+    default:
+      internal_error (__FILE__, __LINE__,
+		      _("arm_gdbarch_init: bad byte order for float format"));
+    }
+
+  tdep->jb_pc = ARM_NBSD_JB_PC;
+  tdep->jb_elt_size = ARM_NBSD_JB_ELEMENT_SIZE;
+
+  /* Single stepping.  */
+  set_gdbarch_software_single_step (gdbarch, arm_software_single_step);
+}
+  
+static void
+arm_netbsd_aout_init_abi (struct gdbarch_info info, 
+			  struct gdbarch *gdbarch)
+{
+  struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
+
+  arm_netbsd_init_abi_common (info, gdbarch);
+  if (tdep->fp_model == ARM_FLOAT_AUTO)
+    tdep->fp_model = ARM_FLOAT_SOFT_FPA;
+}
+
+static void
+arm_netbsd_elf_init_abi (struct gdbarch_info info,
+			 struct gdbarch *gdbarch)
+{
+  struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
+
+  arm_netbsd_init_abi_common (info, gdbarch);
+  if (tdep->fp_model == ARM_FLOAT_AUTO)
+    tdep->fp_model = ARM_FLOAT_SOFT_VFP;
+
+  /* NetBSD ELF uses SVR4-style shared libraries.  */
+  set_solib_svr4_fetch_link_map_offsets
+    (gdbarch, svr4_ilp32_fetch_link_map_offsets);
+}
+
+static enum gdb_osabi
+arm_netbsd_aout_osabi_sniffer (bfd *abfd)
+{
+  if (strcmp (bfd_get_target (abfd), "a.out-arm-netbsd") == 0)
+    return GDB_OSABI_NETBSD_AOUT;
+
+  return GDB_OSABI_UNKNOWN;
+}
+
+/* Provide a prototype to silence -Wmissing-prototypes.  */
+extern initialize_file_ftype _initialize_arm_netbsd_tdep;
+
+void
+_initialize_arm_netbsd_tdep (void)
+{
+  gdbarch_register_osabi_sniffer (bfd_arch_arm, bfd_target_aout_flavour,
+				  arm_netbsd_aout_osabi_sniffer);
+
+  gdbarch_register_osabi (bfd_arch_arm, 0, GDB_OSABI_NETBSD_AOUT,
+                          arm_netbsd_aout_init_abi);
+  gdbarch_register_osabi (bfd_arch_arm, 0, GDB_OSABI_NETBSD_ELF,
+                          arm_netbsd_elf_init_abi);
+}