1 files changed, 126 insertions, 0 deletions
diff --git a/gdb/elf-none-tdep.c b/gdb/elf-none-tdep.c
new file mode 100644
index 0000000..4cbb664
--- /dev/null
+++ b/gdb/elf-none-tdep.c
@@ -0,0 +1,126 @@
+/* Common code for targets with the none ABI (bare-metal), but where the
+   BFD library is build with ELF support.
+
+   Copyright (C) 2020-2021 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 "elf-none-tdep.h"
+#include "regset.h"
+#include "elf-bfd.h"            /* for elfcore_write_* */
+#include "inferior.h"
+#include "regcache.h"
+#include "gdbarch.h"
+#include "gcore.h"
+#include "gcore-elf.h"
+
+/* Build the note section for a corefile, and return it in a malloc
+   buffer.  Currently this just dumps all available registers for each
+   thread.  */
+
+static gdb::unique_xmalloc_ptr<char>
+elf_none_make_corefile_notes (struct gdbarch *gdbarch, bfd *obfd,
+			      int *note_size)
+{
+  gdb::unique_xmalloc_ptr<char> note_data;
+
+  /* Add note information about the executable and its arguments.  */
+  std::string fname;
+  std::string psargs;
+  static const size_t fname_len = 16;
+  static const size_t psargs_len = 80;
+  if (get_exec_file (0))
+    {
+      const char *exe = get_exec_file (0);
+      fname = lbasename (exe);
+      psargs = std::string (exe);
+
+      const char *infargs = get_inferior_args ();
+      if (infargs != nullptr)
+	psargs += " " + std::string (infargs);
+
+      /* All existing targets that handle writing out prpsinfo expect the
+	 fname and psargs strings to be at least 16 and 80 characters long
+	 respectively, including a null terminator at the end.  Resize to
+	 the expected length minus one to ensure there is a null within the
+	 required length.  */
+      fname.resize (fname_len - 1);
+      psargs.resize (psargs_len - 1);
+    }
+
+  /* Resize the buffers up to their required lengths.  This will fill any
+     remaining space with the null character.  */
+  fname.resize (fname_len);
+  psargs.resize (psargs_len);
+
+  /* Now write out the prpsinfo structure.  */
+  note_data.reset (elfcore_write_prpsinfo (obfd, note_data.release (),
+					   note_size, fname.c_str (),
+					   psargs.c_str ()));
+  if (note_data == nullptr)
+    return nullptr;
+
+  /* Thread register information.  */
+  try
+    {
+      update_thread_list ();
+    }
+  catch (const gdb_exception_error &e)
+    {
+      exception_print (gdb_stderr, e);
+    }
+
+  /* Like the Linux kernel, prefer dumping the signalled thread first.
+     "First thread" is what tools use to infer the signalled thread.  */
+  thread_info *signalled_thr = gcore_find_signalled_thread ();
+
+  /* All threads are reported as having been stopped by the same signal
+     that stopped SIGNALLED_THR.  */
+  gdb_signal stop_signal;
+  if (signalled_thr != nullptr)
+    stop_signal = signalled_thr->suspend.stop_signal;
+  else
+    stop_signal = GDB_SIGNAL_0;
+
+  if (signalled_thr != nullptr)
+    gcore_elf_build_thread_register_notes (gdbarch, signalled_thr,
+					   stop_signal, obfd, &note_data,
+					   note_size);
+  for (thread_info *thr : current_inferior ()->non_exited_threads ())
+    {
+      if (thr == signalled_thr)
+	continue;
+
+      gcore_elf_build_thread_register_notes (gdbarch, thr, stop_signal, obfd,
+					     &note_data, note_size);
+    }
+
+
+  /* Target description.  */
+  gcore_elf_make_tdesc_note (obfd, &note_data, note_size);
+
+  return note_data;
+}
+
+/* See none-tdep.h.  */
+
+void
+elf_none_init_abi (struct gdbarch *gdbarch)
+{
+  /* Default core file support.  */
+  set_gdbarch_make_corefile_notes (gdbarch, elf_none_make_corefile_notes);
+}