1 files changed, 189 insertions, 0 deletions
diff --git a/gdbserver/linux-sh-low.cc b/gdbserver/linux-sh-low.cc
new file mode 100644
index 0000000..abe71ff
--- /dev/null
+++ b/gdbserver/linux-sh-low.cc
@@ -0,0 +1,189 @@
+/* GNU/Linux/SH specific low level interface, for the remote server for GDB.
+   Copyright (C) 1995-2020 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"
+
+/* Defined in auto-generated file reg-sh.c.  */
+void init_registers_sh (void);
+extern const struct target_desc *tdesc_sh;
+
+#ifdef HAVE_SYS_REG_H
+#include <sys/reg.h>
+#endif
+
+#include <asm/ptrace.h>
+
+#define sh_num_regs 41
+
+/* Currently, don't check/send MQ.  */
+static int sh_regmap[] = {
+ 0,	4,	8,	12,	16,	20,	24,	28,
+ 32,	36,	40,	44,	48,	52,	56,	60,
+
+ REG_PC*4,   REG_PR*4,   REG_GBR*4,  -1,
+ REG_MACH*4, REG_MACL*4, REG_SR*4,
+ REG_FPUL*4, REG_FPSCR*4,
+
+ REG_FPREG0*4+0,   REG_FPREG0*4+4,   REG_FPREG0*4+8,   REG_FPREG0*4+12,
+ REG_FPREG0*4+16,  REG_FPREG0*4+20,  REG_FPREG0*4+24,  REG_FPREG0*4+28,
+ REG_FPREG0*4+32,  REG_FPREG0*4+36,  REG_FPREG0*4+40,  REG_FPREG0*4+44,
+ REG_FPREG0*4+48,  REG_FPREG0*4+52,  REG_FPREG0*4+56,  REG_FPREG0*4+60,
+};
+
+static int
+sh_cannot_store_register (int regno)
+{
+  return 0;
+}
+
+static int
+sh_cannot_fetch_register (int regno)
+{
+  return 0;
+}
+
+/* Correct in either endianness, obviously.  */
+static const unsigned short sh_breakpoint = 0xc3c3;
+#define sh_breakpoint_len 2
+
+/* Implementation of linux_target_ops method "sw_breakpoint_from_kind".  */
+
+static const gdb_byte *
+sh_sw_breakpoint_from_kind (int kind, int *size)
+{
+  *size = sh_breakpoint_len;
+  return (const gdb_byte *) &sh_breakpoint;
+}
+
+static int
+sh_breakpoint_at (CORE_ADDR where)
+{
+  unsigned short insn;
+
+  (*the_target->read_memory) (where, (unsigned char *) &insn, 2);
+  if (insn == sh_breakpoint)
+    return 1;
+
+  /* If necessary, recognize more trap instructions here.  GDB only uses the
+     one.  */
+  return 0;
+}
+
+/* Support for hardware single step.  */
+
+static int
+sh_supports_hardware_single_step (void)
+{
+  return 1;
+}
+
+/* Provide only a fill function for the general register set.  ps_lgetregs
+   will use this for NPTL support.  */
+
+static void sh_fill_gregset (struct regcache *regcache, void *buf)
+{
+  int i;
+
+  for (i = 0; i < 23; i++)
+    if (sh_regmap[i] != -1)
+      collect_register (regcache, i, (char *) buf + sh_regmap[i]);
+}
+
+static struct regset_info sh_regsets[] = {
+  { 0, 0, 0, 0, GENERAL_REGS, sh_fill_gregset, NULL },
+  NULL_REGSET
+};
+
+static struct regsets_info sh_regsets_info =
+  {
+    sh_regsets, /* regsets */
+    0, /* num_regsets */
+    NULL, /* disabled_regsets */
+  };
+
+static struct usrregs_info sh_usrregs_info =
+  {
+    sh_num_regs,
+    sh_regmap,
+  };
+
+static struct regs_info regs_info =
+  {
+    NULL, /* regset_bitmap */
+    &sh_usrregs_info,
+    &sh_regsets_info
+  };
+
+static const struct regs_info *
+sh_regs_info (void)
+{
+  return &regs_info;
+}
+
+static void
+sh_arch_setup (void)
+{
+  current_process ()->tdesc = tdesc_sh;
+}
+
+struct linux_target_ops the_low_target = {
+  sh_arch_setup,
+  sh_regs_info,
+  sh_cannot_fetch_register,
+  sh_cannot_store_register,
+  NULL, /* fetch_register */
+  linux_get_pc_32bit,
+  linux_set_pc_32bit,
+  NULL, /* breakpoint_kind_from_pc */
+  sh_sw_breakpoint_from_kind,
+  NULL,
+  0,
+  sh_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 */
+  sh_supports_hardware_single_step,
+};
+
+void
+initialize_low_arch (void)
+{
+  init_registers_sh ();
+
+  initialize_regsets_info (&sh_regsets_info);
+}