1 files changed, 157 insertions, 0 deletions
diff --git a/gdbserver/linux-m32r-low.c b/gdbserver/linux-m32r-low.c
new file mode 100644
index 0000000..c52e816
--- /dev/null
+++ b/gdbserver/linux-m32r-low.c
@@ -0,0 +1,157 @@
+/* GNU/Linux/m32r specific low level interface, for the remote server for GDB.
+   Copyright (C) 2005-2020 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 "server.h"
+#include "linux-low.h"
+
+#ifdef HAVE_SYS_REG_H
+#include <sys/reg.h>
+#endif
+
+/* Defined in auto-generated file reg-m32r.c.  */
+void init_registers_m32r (void);
+extern const struct target_desc *tdesc_m32r;
+
+#define m32r_num_regs 25
+
+static int m32r_regmap[] = {
+#ifdef PT_R0
+  PT_R0, PT_R1, PT_R2, PT_R3, PT_R4, PT_R5, PT_R6, PT_R7,
+  PT_R8, PT_R9, PT_R10, PT_R11, PT_R12, PT_FP, PT_LR, PT_SPU,
+  PT_PSW, PT_CBR, PT_SPI, PT_SPU, PT_BPC, PT_PC, PT_ACCL, PT_ACCH, PT_EVB
+#else
+  4 * 4, 4 * 5, 4 * 6, 4 * 7, 4 * 0, 4 * 1, 4 * 2, 4 * 8,
+  4 * 9, 4 * 10, 4 * 11, 4 * 12, 4 * 13, 4 * 24, 4 * 25, 4 * 23,
+  4 * 19, 4 * 31, 4 * 26, 4 * 23, 4 * 20, 4 * 30, 4 * 16, 4 * 15, 4 * 32
+#endif
+};
+
+static int
+m32r_cannot_store_register (int regno)
+{
+  return (regno >= m32r_num_regs);
+}
+
+static int
+m32r_cannot_fetch_register (int regno)
+{
+  return (regno >= m32r_num_regs);
+}
+
+static const unsigned short m32r_breakpoint = 0x10f1;
+#define m32r_breakpoint_len 2
+
+/* Implementation of linux_target_ops method "sw_breakpoint_from_kind".  */
+
+static const gdb_byte *
+m32r_sw_breakpoint_from_kind (int kind, int *size)
+{
+  *size = m32r_breakpoint_len;
+  return (const gdb_byte *) &m32r_breakpoint;
+}
+
+static int
+m32r_breakpoint_at (CORE_ADDR where)
+{
+  unsigned short insn;
+
+  (*the_target->read_memory) (where, (unsigned char *) &insn,
+			      m32r_breakpoint_len);
+  if (insn == m32r_breakpoint)
+    return 1;
+
+  /* If necessary, recognize more trap instructions here.  GDB only uses the
+     one.  */
+  return 0;
+}
+
+static void
+m32r_arch_setup (void)
+{
+  current_process ()->tdesc = tdesc_m32r;
+}
+
+/* Support for hardware single step.  */
+
+static int
+m32r_supports_hardware_single_step (void)
+{
+  return 1;
+}
+
+static struct usrregs_info m32r_usrregs_info =
+  {
+    m32r_num_regs,
+    m32r_regmap,
+  };
+
+static struct regs_info regs_info =
+  {
+    NULL, /* regset_bitmap */
+    &m32r_usrregs_info,
+  };
+
+static const struct regs_info *
+m32r_regs_info (void)
+{
+  return &regs_info;
+}
+
+struct linux_target_ops the_low_target = {
+  m32r_arch_setup,
+  m32r_regs_info,
+  m32r_cannot_fetch_register,
+  m32r_cannot_store_register,
+  NULL, /* fetch_register */
+  linux_get_pc_32bit,
+  linux_set_pc_32bit,
+  NULL, /* breakpoint_from_pc */
+  m32r_sw_breakpoint_from_kind,
+  NULL,
+  0,
+  m32r_breakpoint_at,
+  NULL, /* supports_z_point_type */
+  NULL, /* insert_point */
+  NULL, /* remove_point */
+  NULL, /* stopped_by_watchpoint */
+  NULL, /* stopped_data_address */
+  NULL, /* collect_ptrace_register */
+  NULL, /* supply_ptrace_register */
+  NULL, /* siginfo_fixup */
+  NULL, /* new_process */
+  NULL, /* delete_process */
+  NULL, /* new_thread */
+  NULL, /* delete_thread */
+  NULL, /* new_fork */
+  NULL, /* prepare_to_resume */
+  NULL, /* process_qsupported */
+  NULL, /* supports_tracepoints */
+  NULL, /* get_thread_area */
+  NULL, /* install_fast_tracepoint_jump_pad */
+  NULL, /* emit_ops */
+  NULL, /* get_min_fast_tracepoint_insn_len */
+  NULL, /* supports_range_stepping */
+  NULL, /* breakpoint_kind_from_current_state */
+  m32r_supports_hardware_single_step,
+};
+
+void
+initialize_low_arch (void)
+{
+  init_registers_m32r ();
+}