diff --git a/gdb/Makefile.in b/gdb/Makefile.in
index 1d2dbaf3f7..2d24f09c1b 100644
--- a/gdb/Makefile.in
+++ b/gdb/Makefile.in
@@ -779,6 +779,7 @@ ALL_64_TARGET_OBS = \
ALL_TARGET_OBS = \
arc-tdep.o \
arm.o \
+ arm-3ds-tdep.o \
arm-bsd-tdep.o \
arm-get-next-pcs.o \
arm-linux.o \
@@ -2487,6 +2488,7 @@ ALLDEPFILES = \
amd64-tdep.c \
arc-tdep.c \
arm.c \
+ arm-3ds-tdep.c \
arm-bsd-tdep.c \
arm-get-next-pcs.c \
arm-linux.c \
diff --git a/gdb/arm-3ds-tdep.c b/gdb/arm-3ds-tdep.c
new file mode 100644
index 0000000000..ad014e28db
--- /dev/null
+++ b/gdb/arm-3ds-tdep.c
@@ -0,0 +1,197 @@
+/* Target-dependent code for 3DS. */
+
+/* This uses code from GDB, which license is: */
+
+/*
+ Copyright (C) 2002-2017 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 . */
+
+#include "defs.h"
+#include "gdbcore.h"
+#include "target.h"
+#include "osabi.h"
+#include "xml-syscall.h"
+
+#include "arch/arm.h"
+#include "arch/arm-get-next-pcs.h"
+#include "arm-tdep.h"
+
+static const gdb_byte arm_3ds_arm_le_breakpoint[] = {0xff, 0x00, 0x00, 0xef};
+static const gdb_byte arm_3ds_thumb_le_breakpoint[] = {0xff, 0xdf};
+
+static CORE_ADDR
+ arm_3ds_get_next_pcs_syscall_next_pc (struct arm_get_next_pcs *self);
+
+/* Operation function pointers for get_next_pcs. */
+static struct arm_get_next_pcs_ops arm_3ds_get_next_pcs_ops = {
+ arm_get_next_pcs_read_memory_unsigned_integer,
+ arm_3ds_get_next_pcs_syscall_next_pc,
+ arm_get_next_pcs_addr_bits_remove,
+ arm_get_next_pcs_is_thumb,
+ NULL,
+};
+
+static CORE_ADDR
+arm_3ds_get_next_pcs_syscall_next_pc (struct arm_get_next_pcs *self)
+{
+ CORE_ADDR next_pc = 0;
+ CORE_ADDR pc = regcache_read_pc (self->regcache);
+ int is_thumb = arm_is_thumb (self->regcache);
+ ULONGEST svc_number = 0;
+
+ if (is_thumb)
+ {
+ next_pc = pc + 2;
+ }
+ else
+ {
+ next_pc = pc + 4;
+ }
+
+ /* Addresses for calling Thumb functions have the bit 0 set. */
+ if (is_thumb)
+ next_pc = MAKE_THUMB_ADDR (next_pc);
+
+ return next_pc;
+}
+
+static VEC (CORE_ADDR) *
+arm_3ds_software_single_step (struct regcache *regcache)
+{
+ struct gdbarch *gdbarch = get_regcache_arch (regcache);
+ struct arm_get_next_pcs next_pcs_ctx;
+ CORE_ADDR pc;
+ int i;
+ VEC (CORE_ADDR) *next_pcs = NULL;
+ struct cleanup *old_chain;
+
+ /* If the target does have hardware single step, GDB doesn't have
+ to bother software single step. */
+ if (target_can_do_single_step () == 1)
+ return NULL;
+
+ old_chain = make_cleanup (VEC_cleanup (CORE_ADDR), &next_pcs);
+
+ arm_get_next_pcs_ctor (&next_pcs_ctx,
+ &arm_3ds_get_next_pcs_ops,
+ gdbarch_byte_order (gdbarch),
+ gdbarch_byte_order_for_code (gdbarch),
+ 1,
+ regcache);
+
+ next_pcs = arm_get_next_pcs (&next_pcs_ctx);
+
+ for (i = 0; VEC_iterate (CORE_ADDR, next_pcs, i, pc); i++)
+ {
+ pc = gdbarch_addr_bits_remove (gdbarch, pc);
+ VEC_replace (CORE_ADDR, next_pcs, i, pc);
+ }
+
+ discard_cleanups (old_chain);
+
+ return next_pcs;
+}
+
+static LONGEST
+arm_3ds_get_syscall_number (struct gdbarch *gdbarch,
+ ptid_t ptid)
+{
+ struct regcache *regs = get_thread_regcache (ptid);
+
+ ULONGEST pc;
+ ULONGEST cpsr;
+ ULONGEST t_bit = arm_psr_thumb_bit (gdbarch);
+ int is_thumb;
+ ULONGEST svc_number = -1;
+
+ regcache_cooked_read_unsigned (regs, ARM_PC_REGNUM, &pc);
+ regcache_cooked_read_unsigned (regs, ARM_PS_REGNUM, &cpsr);
+ is_thumb = (cpsr & t_bit) != 0;
+
+ if (is_thumb)
+ {
+ enum bfd_endian byte_order_for_code =
+ gdbarch_byte_order_for_code (gdbarch);
+
+ /* PC gets incremented before the syscall-stop, so read the
+ previous instruction. */
+ unsigned long this_instr =
+ read_memory_unsigned_integer (pc - 2, 2, byte_order_for_code);
+
+ unsigned long svc_operand = (0x00ff & this_instr);
+ svc_number = svc_operand;
+ }
+ else
+ {
+ enum bfd_endian byte_order_for_code =
+ gdbarch_byte_order_for_code (gdbarch);
+
+ /* PC gets incremented before the syscall-stop, so read the
+ previous instruction. */
+ unsigned long this_instr =
+ read_memory_unsigned_integer (pc - 4, 4, byte_order_for_code);
+
+ unsigned long svc_operand = (0x000000ff & this_instr);
+ svc_number = svc_operand;
+ }
+
+ if (svc_number == 0xfe)
+ {
+ regcache_cooked_read_unsigned (regs, 12, &svc_number);
+ }
+
+ return svc_number;
+}
+
+static void
+arm_3ds_init_abi (struct gdbarch_info info,
+ struct gdbarch *gdbarch)
+{
+ struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
+
+ switch (info.byte_order)
+ {
+ case BFD_ENDIAN_LITTLE:
+ tdep->arm_breakpoint = arm_3ds_arm_le_breakpoint;
+ tdep->thumb_breakpoint = arm_3ds_thumb_le_breakpoint;
+ tdep->arm_breakpoint_size = sizeof (arm_3ds_arm_le_breakpoint);
+ tdep->thumb_breakpoint_size = sizeof (arm_3ds_thumb_le_breakpoint);
+ break;
+
+ default:
+ internal_error (__FILE__, __LINE__,
+ _("arm_gdbarch_init: bad byte order"));
+ }
+ tdep->fp_model = ARM_FLOAT_VFP;
+
+ /* Single stepping. */
+ set_gdbarch_software_single_step (gdbarch, arm_3ds_software_single_step);
+
+ /* `catch syscall' */
+ set_xml_syscall_file_name (gdbarch, "syscalls/arm-3ds.xml");
+ set_gdbarch_get_syscall_number (gdbarch, arm_3ds_get_syscall_number);
+}
+
+/* Provide a prototype to silence -Wmissing-prototypes. */
+extern initialize_file_ftype _initialize_arm_3ds_tdep;
+
+void
+_initialize_arm_3ds_tdep (void)
+{
+ gdbarch_register_osabi (bfd_arch_arm, 0, GDB_OSABI_3DS,
+ arm_3ds_init_abi);
+}
diff --git a/gdb/configure.tgt b/gdb/configure.tgt
index fdcb7b1d69..d8fd1622b8 100644
--- a/gdb/configure.tgt
+++ b/gdb/configure.tgt
@@ -119,8 +119,8 @@ arm*-*-symbianelf*)
gdb_target_obs="arm.o arm-get-next-pcs.o arm-tdep.o arm-symbian-tdep.o"
;;
arm*-*-*)
- # Target: ARM embedded system
- gdb_target_obs="arm.o arm-get-next-pcs.o arm-tdep.o"
+ # Target: ARM embedded system (+ 3DS)
+ gdb_target_obs="arm.o arm-get-next-pcs.o arm-tdep.o arm-3ds-tdep.o"
gdb_sim=../sim/arm/libsim.a
;;
diff --git a/gdb/data-directory/Makefile.in b/gdb/data-directory/Makefile.in
index 304d4b05c0..2cf8986d3a 100644
--- a/gdb/data-directory/Makefile.in
+++ b/gdb/data-directory/Makefile.in
@@ -63,7 +63,7 @@ GEN_SYSCALLS_FILES = \
sparc-linux.xml \
sparc64-linux.xml
-SYSCALLS_FILES = gdb-syscalls.dtd freebsd.xml $(GEN_SYSCALLS_FILES)
+SYSCALLS_FILES = gdb-syscalls.dtd freebsd.xml arm-3ds.xml $(GEN_SYSCALLS_FILES)
PYTHON_DIR = python
PYTHON_INSTALL_DIR = $(DESTDIR)$(GDB_DATADIR)/$(PYTHON_DIR)
diff --git a/gdb/defs.h b/gdb/defs.h
index a0b586f401..a1508fd5b3 100644
--- a/gdb/defs.h
+++ b/gdb/defs.h
@@ -604,6 +604,7 @@ enum gdb_osabi
GDB_OSABI_LYNXOS178,
GDB_OSABI_NEWLIB,
GDB_OSABI_SDE,
+ GDB_OSABI_3DS,
GDB_OSABI_INVALID /* keep this last */
};
diff --git a/gdb/osabi.c b/gdb/osabi.c
index 84fa9c0273..c1c4bb1672 100644
--- a/gdb/osabi.c
+++ b/gdb/osabi.c
@@ -79,6 +79,7 @@ static const struct osabi_names gdb_osabi_names[] =
{ "LynxOS178", NULL },
{ "Newlib", NULL },
{ "SDE", NULL },
+ { "3DS", NULL },
{ "", NULL }
};
diff --git a/gdb/syscalls/arm-3ds.xml b/gdb/syscalls/arm-3ds.xml
new file mode 100644
index 0000000000..48780b7bd5
--- /dev/null
+++ b/gdb/syscalls/arm-3ds.xml
@@ -0,0 +1,159 @@
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