# When this file is updated in an existing source tree, it gets re-applied
# during the next build using "patch -N --fuzz=0", which ignores patches
# that have already been applied.  However, if a gdb file has been modified
# multiple times, the subsequent patching may fail to recognize that a
# given patch has been previously applied, and will attempt to re-apply it.
# To prevent any unintended consequences, this file also acts as a
# shell script that can restore any gdb file to its original state prior
# to all subsequent patch applications.

tar xvzmf gdb-16.2.tar.gz \
	gdb-16.2/gdb/symfile.c

exit 0

--- gdb-16.2/Makefile.in.orig
+++ gdb-16.2/Makefile.in
@@ -369,6 +369,9 @@ CC_FOR_BUILD = @CC_FOR_BUILD@
 CFLAGS_FOR_BUILD = @CFLAGS_FOR_BUILD@
 CPP_FOR_BUILD = @CPP_FOR_BUILD@
 CPPFLAGS_FOR_BUILD = @CPPFLAGS_FOR_BUILD@
+ifeq (${CRASH_TARGET}, PPC64)
+CFLAGS_FOR_BUILD += -m64 -fPIC
+endif
 CXXFLAGS_FOR_BUILD = @CXXFLAGS_FOR_BUILD@
 CXX_FOR_BUILD = @CXX_FOR_BUILD@
 DLLTOOL_FOR_BUILD = @DLLTOOL_FOR_BUILD@
@@ -441,6 +444,9 @@ GNATBIND = @GNATBIND@
 GNATMAKE = @GNATMAKE@
 
 CFLAGS = @CFLAGS@
+ifeq (${CRASH_TARGET}, PPC64)
+CFLAGS += -m64 -fPIC
+endif
 LDFLAGS = @LDFLAGS@
 LIBCFLAGS = $(CFLAGS)
 CXXFLAGS = @CXXFLAGS@
--- gdb-16.2/gdb/Makefile.in.orig
+++ gdb-16.2/gdb/Makefile.in
@@ -603,7 +603,7 @@ CONFIG_DEP_SUBDIR = $(addsuffix /$(DEPDIR),$(CONFIG_SRC_SUBDIR))
 # It is also possible that you will need to add -I/usr/include/sys if
 # your system doesn't have fcntl.h in /usr/include (which is where it
 # should be according to Posix).
-DEFS = @DEFS@
+DEFS = -DCRASH_MERGE -D${CRASH_TARGET} @DEFS@
 GDB_INCLUDED_HEADER = -include $(srcdir)/defs.h
 GDB_CFLAGS = \
 	-I. \
@@ -1220,6 +1220,7 @@ COMMON_SFILES = \
 	symmisc.c \
 	symtab.c \
 	target.c \
+	../../crash_target.c \
 	target-connection.c \
 	target-dcache.c \
 	target-descriptions.c \
@@ -1906,7 +1907,7 @@ COMMON_OBS = $(DEPFILES) $(CONFIG_OBS) $(YYOBJ) \
 	$(SUBDIR_TARGET_OBS) \
 	$(SUBDIR_GCC_COMPILE_OBS)
 
-SUBDIRS = doc @subdirs@ data-directory
+SUBDIRS = build_no_subdirs
 CLEANDIRS = $(SUBDIRS)
 
 # List of subdirectories in the build tree that must exist.
@@ -1947,8 +1948,8 @@ generated_files = \
 # Flags needed to compile Python code
 PYTHON_CFLAGS = @PYTHON_CFLAGS@
 
-all: gdb$(EXEEXT) $(CONFIG_ALL) gdb-gdb.py gdb-gdb.gdb gcore gstack
-	@$(MAKE) $(FLAGS_TO_PASS) DO=all "DODIRS=$(SUBDIRS)" subdir_do
+all: gdb$(EXEEXT) gdb-gdb.py gdb-gdb.gdb gcore gstack
+	@$(MAKE) -s $(FLAGS_TO_PASS) DO=all "DODIRS=$(SUBDIRS)" subdir_do
 
 # Rule for compiling .c files in the top-level gdb directory.
 # The order-only dependencies ensure that we create the build subdirectories.
@@ -2230,9 +2231,10 @@ libgdb.a: $(LIBGDB_OBS)
 # Removing the old gdb first works better if it is running, at least on SunOS.
 gdb$(EXEEXT): gdb.o $(LIBGDB_OBS) $(CDEPS) $(TDEPLIBS)
 	$(SILENCE) rm -f gdb$(EXEEXT)
+	@$(MAKE) -C ../.. GDB_FLAGS=-DGDB_16_2 library
 	$(ECHO_CXXLD) $(CC_LD) $(INTERNAL_LDFLAGS) $(WIN32LDAPP) \
-		-o gdb$(EXEEXT) gdb.o $(LIBGDB_OBS) \
-		$(TDEPLIBS) $(TUI_LIBRARY) $(CLIBS) $(LOADLIBES)
+                -o $(shell /bin/cat mergeobj) $(LIBGDB_OBS) \
+                $(TDEPLIBS) $(TUI_LIBRARY) $(CLIBS) $(LOADLIBES) $(shell /bin/cat mergelibs)
 ifneq ($(CODESIGN_CERT),)
 	$(ECHO_SIGN) $(CODESIGN) -s $(CODESIGN_CERT) gdb$(EXEEXT)
 endif
@@ -2699,9 +2701,9 @@ ifeq ($(DEPMODE),depmode=gcc3)
 # into place if the compile succeeds.  We need this because gcc does
 # not atomically write the dependency output file.
 override COMPILE.post = -c -o $@ -MT $@ -MMD -MP \
-	-MF $(@D)/$(DEPDIR)/$(basename $(@F)).Tpo
-override POSTCOMPILE = @mv $(@D)/$(DEPDIR)/$(basename $(@F)).Tpo \
-	$(@D)/$(DEPDIR)/$(basename $(@F)).Po
+        -MF $(subst ../..,.,$(@D))/$(DEPDIR)/$(basename $(@F)).Tpo
+override POSTCOMPILE = @mv $(subst ../..,.,$(@D))/$(DEPDIR)/$(basename $(@F)).Tpo \
+        $(subst ../..,.,$(@D))/$(DEPDIR)/$(basename $(@F)).Po
 else
 override COMPILE.pre = source='$<' object='$@' libtool=no \
 	DEPDIR=$(DEPDIR) $(DEPMODE) $(depcomp) \
--- gdb-16.2/gdb/c-typeprint.c.orig
+++ gdb-16.2/gdb/c-typeprint.c
@@ -1066,6 +1066,9 @@ c_type_print_base_struct_union (struct type *type, struct ui_file *stream,
 		= podata->end_bitpos
 		  - type->field (i).type ()->length () * TARGET_CHAR_BIT;
 	    }
+	  else if (strlen(type->field(i).name()) == 0)
+	    /* crash: Print details for unnamed struct and union. */
+	    newshow = show;
 
 	  c_print_type_1 (type->field (i).type (),
 			  type->field (i).name (),
--- gdb-16.2/gdb/cli/cli-cmds.c.orig
+++ gdb-16.2/gdb/cli/cli-cmds.c
@@ -427,6 +427,11 @@ complete_command (const char *arg, int from_tty)
     }
 }
 
+#ifdef CRASH_MERGE
+static int crash_from_tty = 0;
+extern "C" void untrusted_file(FILE *, char *);
+#endif
+
 int
 is_complete_command (struct cmd_list_element *c)
 {
@@ -659,8 +664,32 @@ find_and_open_script (const char *script_file, int search_path)
       close (fd);
       errno = save_errno;
     }
-  else
-    opened.emplace (gdb_file_up (result), std::move (full_path));
+#ifdef CRASH_MERGE
+  /*
+   * Only allow trusted versions of .gdbinit files to be
+   * sourced during session initialization.
+   */
+  if (crash_from_tty == -1)
+    {
+      struct stat statbuf;
+      FILE *stream = result;
+      int _fd = fileno (stream);
+      if (fstat (_fd, &statbuf) < 0)
+        {
+          perror_with_name (full_path.get());
+          fclose (stream);
+          return opened;
+        }
+      if (statbuf.st_uid != getuid () || (statbuf.st_mode & S_IWOTH))
+        {
+          untrusted_file(NULL, full_path.get());
+          fclose (stream);
+          return opened;
+        }
+    }
+#endif
+  opened.emplace (gdb_file_up (result), std::move (full_path));
+
 
   return opened;
 }
@@ -724,7 +753,11 @@ source_script_with_search (const char *file, int from_tty, int search_path)
 	 If the source command was invoked interactively, throw an
 	 error.  Otherwise (e.g. if it was invoked by a script),
 	 just emit a warning, rather than cause an error.  */
+#ifdef CRASH_MERGE
+      if (from_tty > 0)
+#else
       if (from_tty)
+#endif
 	perror_with_name (file);
       else
 	{
@@ -756,7 +789,14 @@ source_script_with_search (const char *file, int from_tty, int search_path)
 void
 source_script (const char *file, int from_tty)
 {
+#ifdef CRASH_MERGE
+  crash_from_tty = from_tty;
+#endif
   source_script_with_search (file, from_tty, 0);
+#ifdef CRASH_MERGE
+  crash_from_tty = 0;
+#endif
+
 }
 
 static void
--- gdb-16.2/gdb/completer.c.orig
+++ gdb-16.2/gdb/completer.c
@@ -3315,6 +3315,8 @@ gdb_display_match_list_1 (char **matches, int len, int max,
 
   /* How many items of MAX length can we fit in the screen window? */
   cols = gdb_complete_get_screenwidth (displayer);
+  rl_reset_screen_size();
+  rl_get_screen_size(NULL, &cols);
   max += 2;
   limit = cols / max;
   if (limit != 1 && (limit * max == cols))
--- gdb-16.2/gdb/defs.h.orig
+++ gdb-16.2/gdb/defs.h
@@ -407,4 +407,7 @@ DEF_ENUM_FLAGS_TYPE (enum user_selected_what_flag, user_selected_what);
 
 #include "utils.h"
 
+#ifdef CRASH_MERGE
+extern "C" int gdb_main_entry(int, char **);
+#endif
 #endif /* GDB_DEFS_H */
--- gdb-16.2/gdb/dwarf2/read-gdb-index.c.orig
+++ gdb-16.2/gdb/dwarf2/read-gdb-index.c
@@ -369,7 +369,11 @@ read_gdb_index_from_buffer (const char *filename,
      indices.  */
   if (version < 4)
     {
+#ifdef CRASH_MERGE
+      static int warning_printed = 1;
+#else
       static int warning_printed = 0;
+#endif
       if (!warning_printed)
 	{
 	  warning (_("Skipping obsolete .gdb_index section in %s."),
@@ -388,7 +392,11 @@ read_gdb_index_from_buffer (const char *filename,
      "set use-deprecated-index-sections on".  */
   if (version < 6 && !deprecated_ok)
     {
+#ifdef CRASH_MERGE
+      static int warning_printed = 1;
+#else
       static int warning_printed = 0;
+#endif
       if (!warning_printed)
 	{
 	  warning (_("\
--- gdb-16.2/gdb/event-top.c.orig
+++ gdb-16.2/gdb/event-top.c
@@ -1558,6 +1558,10 @@ gdb_setup_readline (int editing)
 {
   struct ui *ui = current_ui;
 
+  if (!batch_silent)
+    gdb_stdout = new stdio_file (ui->outstream);
+  gdb_stderr = new stderr_file (ui->errstream);
+
   /* If the input stream is connected to a terminal, turn on editing.
      However, that is only allowed on the main UI, as we can only have
      one instance of readline.  Also, INSTREAM might be nullptr when
--- gdb-16.2/gdb/frame.c.orig
+++ gdb-16.2/gdb/frame.c
@@ -966,6 +966,10 @@ frame_find_by_id (struct frame_id id)
   return NULL;
 }
 
+#if defined(CRASH_MERGE) && defined(ARM64)
+extern "C" void crash_decode_ptrauth_pc(ulong* pc);
+#endif
+
 static CORE_ADDR
 frame_unwind_pc (const frame_info_ptr &this_frame)
 {
@@ -996,6 +1000,9 @@ frame_unwind_pc (const frame_info_ptr &this_frame)
       try
 	{
 	  pc = gdbarch_unwind_pc (prev_gdbarch, this_frame);
+#if defined(CRASH_MERGE) && defined(ARM64)
+	  crash_decode_ptrauth_pc(&pc);
+#endif
 	  pc_p = true;
 	}
       catch (const gdb_exception_error &ex)
--- gdb-16.2/gdb/main.c.orig
+++ gdb-16.2/gdb/main.c
@@ -442,6 +442,14 @@ start_event_loop ()
   return;
 }
 
+#ifdef CRASH_MERGE
+extern "C" void update_gdb_hooks(void);
+extern "C" void main_loop(void);
+extern "C" unsigned long crash_get_kaslr_offset(void);
+extern "C" int console(const char *, ...);
+void crash_target_init (void);
+#endif
+
 /* Call command_loop.  */
 
 /* Prevent inlining this function for the benefit of GDB's selftests
@@ -1031,7 +1039,11 @@ captured_main_1 (struct captured_main_args *context)
       }
   }
 
+#ifdef CRASH_MERGE
+  save_original_signals_state (1);
+#else
   save_original_signals_state (quiet);
+#endif
 
   /* Try to set up an alternate signal stack for SIGSEGV handlers.  */
   gdb::alternate_signal_stack signal_stack;
@@ -1129,7 +1141,7 @@ captured_main_1 (struct captured_main_args *context)
   if (print_version)
     {
       print_gdb_version (gdb_stdout, false);
-      gdb_printf ("\n");
+      gdb_printf ("\n\n");
       exit (0);
     }
 
@@ -1150,6 +1162,10 @@ captured_main_1 (struct captured_main_args *context)
      look at things by now.  Initialize the default interpreter.  */
   set_top_level_interpreter (interpreter_p.c_str (), false);
 
+#ifdef CRASH_MERGE
+  update_gdb_hooks();
+#endif
+
   /* The interpreter should have installed the real uiout by now.  */
   gdb_assert (current_uiout != temp_uiout.get ());
   temp_uiout = nullptr;
@@ -1177,7 +1193,11 @@ captured_main_1 (struct captured_main_args *context)
   if (!system_gdbinit.empty () && !inhibit_gdbinit)
     {
       for (const std::string &file : system_gdbinit)
+#ifdef CRASH_MERGE
+        ret = catch_command_errors (source_script, file.c_str (), -1);
+#else
 	ret = catch_command_errors (source_script, file.c_str (), 0);
+#endif
     }
 
   /* Read and execute $HOME/.gdbinit file, if it exists.  This is done
@@ -1186,7 +1206,11 @@ captured_main_1 (struct captured_main_args *context)
      debugging or what directory you are in.  */
 
   if (!home_gdbinit.empty () && !inhibit_gdbinit && !inhibit_home_gdbinit)
+#ifdef CRASH_MERGE
+    ret = catch_command_errors (source_script, home_gdbinit.c_str (), -1);
+#else
     ret = catch_command_errors (source_script, home_gdbinit.c_str (), 0);
+#endif
 
   /* Process '-ix' and '-iex' options early.  */
   execute_cmdargs (&cmdarg_vec, CMDARG_INIT_FILE, CMDARG_INIT_COMMAND, &ret);
@@ -1217,7 +1241,11 @@ captured_main_1 (struct captured_main_args *context)
 				  !batch_flag);
       if (ret != 0)
 	ret = catch_command_errors (symbol_file_add_main_adapter,
+#ifdef CRASH_MERGE
+                                    symarg, 0);
+#else
 				    symarg, !batch_flag);
+#endif
     }
   else
     {
@@ -1291,7 +1319,11 @@ captured_main_1 (struct captured_main_args *context)
 	    {
 	      auto_load_local_gdbinit_loaded = 1;
 
+#ifdef CRASH_MERGE
+              ret = catch_command_errors (source_script, local_gdbinit.c_str (), -1);
+#else
 	      ret = catch_command_errors (source_script, local_gdbinit.c_str (), 0);
+#endif
 	    }
 	}
     }
@@ -1332,6 +1364,16 @@ captured_main (void *data)
 
   captured_main_1 (context);
 
+#ifdef CRASH_MERGE
+  /* Relocate the vmlinux. */
+  objfile_rebase (current_program_space->symfile_object_file, crash_get_kaslr_offset());
+
+  crash_target_init();
+
+  /* Back to crash.  */
+  main_loop();
+#endif
+
   /* NOTE: cagney/1999-11-07: There is probably no reason for not
      moving this loop and the code found in captured_command_loop()
      into the command_loop() proper.  The main thing holding back that
@@ -1350,6 +1392,9 @@ captured_main (void *data)
 	{
 	  exception_print (gdb_stderr, ex);
 	}
+#ifdef CRASH_MERGE
+        console("<CAPTURED_MAIN WHILE LOOP>\n");
+#endif
     }
   /* No exit -- exit is through quit_command.  */
 }
@@ -1371,6 +1416,24 @@ gdb_main (struct captured_main_args *args)
   return 1;
 }
 
+#ifdef CRASH_MERGE
+/*
+ *  NOTE: adapted from gdb.c, which is no longer built in; changed name of
+ *        original main() to gdb_main_entry() for use as crash entry point
+ */
+extern bool is_main_thread ();
+int
+gdb_main_entry (int argc, char **argv)
+{
+  struct captured_main_args args;
+  gdb_assert (is_main_thread ());
+  memset (&args, 0, sizeof args);
+  args.argc = argc;
+  args.argv = argv;
+  args.interpreter_p = INTERP_CONSOLE;
+  return gdb_main (&args);
+}
+#endif
 
 /* Don't use *_filtered for printing help.  We don't want to prompt
    for continue no matter how small the screen or how much we're going
--- gdb-16.2/gdb/objfiles.h.orig
+++ gdb-16.2/gdb/objfiles.h
@@ -891,6 +891,8 @@ struct objfile : intrusive_list_node<objfile>
      mechanism as ELF should set this flag too.  This flag is used in
      conjunction with the minimal_symbol::maybe_copied method.  */
   bool object_format_has_copy_relocs = false;
+
+  bool all_symtabs_expanded = false;
 };
 
 /* A deleter for objfile.  */
@@ -951,11 +953,11 @@ extern bool objfile_has_symbols (objfile *objfile);
 
 /* Return true if any objfile of PSPACE has partial symbols.  */
 
-extern bool have_partial_symbols (program_space *pspace);
+extern "C" bool have_partial_symbols (program_space *pspace);
 
 /* Return true if any objfile of PSPACE has full symbols.  */
 
-extern bool have_full_symbols (program_space *pspace);
+extern "C" bool have_full_symbols (program_space *pspace);
 
 extern void objfile_set_sym_fns (struct objfile *objfile,
 				 const struct sym_fns *sf);
--- gdb-16.2/gdb/printcmd.c.orig
+++ gdb-16.2/gdb/printcmd.c
@@ -552,6 +552,9 @@ set_next_address (struct gdbarch *gdbarch, CORE_ADDR addr)
    form.  However note that DO_DEMANGLE can be overridden by the specific
    settings of the demangle and asm_demangle variables.  Returns
    non-zero if anything was printed; zero otherwise.  */
+#ifdef CRASH_MERGE
+extern "C" int gdb_print_callback(unsigned long);
+#endif
 
 int
 print_address_symbolic (struct gdbarch *gdbarch, CORE_ADDR addr,
@@ -563,6 +566,12 @@ print_address_symbolic (struct gdbarch *gdbarch, CORE_ADDR addr,
   int offset = 0;
   int line = 0;
 
+#ifdef CRASH_MERGE
+  if (!gdb_print_callback(addr)) {
+        return 0;
+  }
+#endif
+
   if (build_address_symbolic (gdbarch, addr, do_demangle, false, &name,
 			      &offset, &filename, &line, &unmapped))
     return 0;
@@ -595,6 +604,10 @@ print_address_symbolic (struct gdbarch *gdbarch, CORE_ADDR addr,
 
 /* See valprint.h.  */
 
+#ifdef CRASH_MERGE
+extern "C" char *gdb_lookup_module_symbol(unsigned long, unsigned long *);
+#endif
+
 int
 build_address_symbolic (struct gdbarch *gdbarch,
 			CORE_ADDR addr,  /* IN */
@@ -701,7 +714,19 @@ build_address_symbolic (struct gdbarch *gdbarch,
 	}
     }
   if (symbol == NULL && msymbol.minsym == NULL)
+#ifdef CRASH_MERGE
+  {
+    char *name_ptr = gdb_lookup_module_symbol(addr, (unsigned long *)offset);
+    if (name_ptr) {
+      *name = name_ptr;
+      return 0;
+    } else {
+      return 1;
+    }
+  }
+#else
     return 1;
+#endif
 
   /* If the nearest symbol is too far away, don't print anything symbolic.  */
 
@@ -1242,6 +1267,42 @@ print_command_parse_format (const char **expp, const char *cmdname,
   *expp = exp;
 }
 
+static void
+print_command_2 (const char *args, int voidprint)
+{
+  struct value *val;
+  value_print_options print_opts;
+
+  get_user_print_options (&print_opts);
+  /* Override global settings with explicit options, if any.  */
+  auto group = make_value_print_options_def_group (&print_opts);
+  gdb::option::process_options
+    (&args, gdb::option::PROCESS_OPTIONS_REQUIRE_DELIMITER, group);
+
+  print_command_parse_format (&args, "print", &print_opts);
+
+  const char *exp = args;
+
+  if (exp != nullptr && *exp)
+    {
+      expression_up expr = parse_expression (exp);
+      val = expr->evaluate ();
+    } else
+      val = access_value_history (0);
+
+    gdb_printf("%d %d %ld %ld %ld %ld\n",
+      check_typedef(val->type ())->code(),
+      check_typedef(val->type ())->is_unsigned(),
+      check_typedef(val->type ())->length(),
+      val->offset(), val->bitpos(), val->bitsize());
+}
+
+static void
+printm_command (const char *exp, int from_tty)
+{
+  print_command_2 (exp, 1);
+}
+
 /* See valprint.h.  */
 
 void
@@ -3357,6 +3418,12 @@ but no count or size letter (see \"x\" command)."),
     = add_com ("print", class_vars, print_command, print_help.c_str ());
   set_cmd_completer_handle_brkchars (print_cmd, print_command_completer);
   add_com_alias ("p", print_cmd, class_vars, 1);
+
+  c = add_com ("printm", class_vars, printm_command, _("\
+Similar to \"print\" command, but it used to print the type, size, offset,\n\
+bitpos and bitsize of the expression EXP."));
+  set_cmd_completer (c, expression_completer);
+
   add_com_alias ("inspect", print_cmd, class_vars, 1);
 
   add_setshow_uinteger_cmd ("max-symbolic-offset", no_class,
--- gdb-16.2/gdb/psymtab.c.orig
+++ gdb-16.2/gdb/psymtab.c
@@ -80,6 +80,9 @@ psymbol_functions::partial_symbols (struct objfile *objfile)
   return m_partial_symtabs->range ();
 }
 
+#ifdef CRASH_MERGE
+  extern "C" int gdb_line_number_callback(unsigned long, unsigned long, unsigned long);
+#endif
 /* Find which partial symtab contains PC and SECTION starting at psymtab PST.
    We may find a different psymtab than PST.  See FIND_PC_SECT_PSYMTAB.  */
 
@@ -170,7 +173,12 @@ psymbol_functions::find_pc_sect_psymtab (struct objfile *objfile,
 
 	best_pst = find_pc_sect_psymtab_closer (objfile, pc, section, pst,
 						msymbol);
+#ifdef CRASH_MERGE
+        if ((best_pst != NULL) &&
+          gdb_line_number_callback(pc, pst->text_low (objfile), pst->text_high (objfile)))
+#else
 	if (best_pst != NULL)
+#endif
 	  return best_pst;
       }
 
--- gdb-16.2/gdb/stack.c.orig
+++ gdb-16.2/gdb/stack.c
@@ -1968,6 +1968,11 @@ static frame_command_helper <select_frame_command_core> select_frame_cmd;
 /* Print briefly all stack frames or just the innermost COUNT_EXP
    frames.  */
 
+#ifdef CRASH_MERGE
+extern "C" int is_kvaddr(ulong);
+extern "C" int gdb_CRASHDEBUG(ulong);
+#endif
+
 static void
 backtrace_command_1 (const frame_print_options &fp_opts,
 		     const backtrace_cmd_options &bt_opts,
@@ -2062,6 +2067,17 @@ backtrace_command_1 (const frame_print_options &fp_opts,
 	     hand, perhaps the code does or could be fixed to make sure
 	     the frame->prev field gets set to NULL in that case).  */
 
+#ifdef CRASH_MERGE
+	  CORE_ADDR pc = 0;
+	  get_frame_pc_if_available (fi, &pc);
+	  if (!is_kvaddr(pc)) {
+	    if (gdb_CRASHDEBUG(1)) {
+	       gdb_printf(_("Backtrace stopped: due to non-kernel addr: 0x%lx\n"),pc);
+	    }
+	    fi = NULL;
+	    break;
+	  }
+#endif
 	  print_frame_info (fp_opts, fi, 1, LOCATION, 1, 0);
 	  if ((flags & PRINT_LOCALS) != 0)
 	    print_frame_local_vars (fi, false, NULL, NULL, 1, gdb_stdout);
@@ -2081,7 +2097,7 @@ backtrace_command_1 (const frame_print_options &fp_opts,
 	  enum unwind_stop_reason reason;
 
 	  reason = get_frame_unwind_stop_reason (trailing);
-	  if (reason >= UNWIND_FIRST_ERROR)
+	  if (reason >= UNWIND_FIRST_ERROR && gdb_CRASHDEBUG(1))
 	    gdb_printf (_("Backtrace stopped: %s\n"),
 			frame_stop_reason_string (trailing));
 	}
--- gdb-16.2/gdb/symfile.c.orig
+++ gdb-16.2/gdb/symfile.c
@@ -633,7 +633,26 @@ default_symfile_offsets (struct objfile *objfile,
       for (cur_sec = abfd->sections; cur_sec != NULL; cur_sec = cur_sec->next)
 	/* We do not expect this to happen; just skip this step if the
 	   relocatable file has a section with an assigned VMA.  */
-	if (bfd_section_vma (cur_sec) != 0)
+        if (bfd_section_vma (cur_sec) != 0
+           /*
+            *  Kernel modules may have some non-zero VMAs, i.e., like the
+            *  __ksymtab and __ksymtab_gpl sections in this example:
+            *
+            *    Section Headers:
+            *      [Nr] Name              Type             Address           Offset
+            *           Size              EntSize          Flags  Link  Info  Align
+            *      ...
+            *      [ 8] __ksymtab         PROGBITS         0000000000000060  0000ad90
+            *           0000000000000010  0000000000000000   A       0     0     16
+            *      [ 9] .rela__ksymtab    RELA             0000000000000000  0000ada0
+            *           0000000000000030  0000000000000018          43     8     8
+            *      [10] __ksymtab_gpl     PROGBITS         0000000000000070  0000add0
+            *           00000000000001a0  0000000000000000   A       0     0     16
+            *      ...
+            *
+            *  but they should be treated as if they are NULL.
+            */
+            && strncmp (bfd_section_name (cur_sec), "__k", 3) != 0)
 	  break;
 
       if (cur_sec == NULL)
@@ -1069,6 +1088,12 @@ symbol_file_add_with_addrs (const gdb_bfd_ref_ptr &abfd, const char *name,
 
   objfile *objfile
     = objfile::make (abfd, current_program_space, name, flags, parent);
+#ifdef CRASH_MERGE
+  if (add_flags & SYMFILE_MAINLINE) {
+    extern struct objfile *gdb_kernel_objfile;
+    gdb_kernel_objfile = objfile;
+  }
+#endif
 
   /* We either created a new mapped symbol table, mapped an existing
      symbol table file which has not had initial symbol reading
@@ -1095,6 +1120,7 @@ symbol_file_add_with_addrs (const gdb_bfd_ref_ptr &abfd, const char *name,
 		    styled_string (file_name_style.style (), name));
 
       objfile->expand_all_symtabs ();
+      objfile->all_symtabs_expanded = true;
     }
 
   /* Note that we only print a message if we have no symbols and have
@@ -1352,6 +1378,10 @@ show_debug_file_directory (struct ui_file *file, int from_tty,
 #if ! defined (DEBUG_SUBDIRECTORY)
 #define DEBUG_SUBDIRECTORY ".debug"
 #endif
+#ifdef CRASH_MERGE
+extern "C" int check_specified_module_tree(const char *, const char *);
+extern "C" char *check_specified_kernel_debug_file();
+#endif
 
 /* Find a separate debuginfo file for OBJFILE, using DIR as the directory
    where the original file resides (may not be the same as
@@ -1390,6 +1420,15 @@ find_separate_debug_file (const char *dir,
   if (separate_debug_file_exists (debugfile, crc32, objfile, warnings))
     return debugfile;
 
+#ifdef CRASH_MERGE
+{
+  if (check_specified_module_tree(objfile_name (objfile), debugfile.c_str()) &&
+      separate_debug_file_exists(debugfile, crc32, objfile, warnings)) {
+        return debugfile;
+  }
+}
+#endif
+
   /* Then try in the global debugfile directories.
 
      Keep backward compatibility so that DEBUG_FILE_DIRECTORY being "" will
@@ -1545,6 +1584,14 @@ find_separate_debug_file_by_debuglink
 	}
     }
 
+#ifdef CRASH_MERGE
+  if (debugfile.empty ()) {
+       char *name_copy;
+       name_copy = check_specified_kernel_debug_file();
+       return name_copy ? std::string (name_copy) : std::string ();
+  }
+#endif
+
   return debugfile;
 }
 
@@ -2318,8 +2365,10 @@ add_symbol_file_command (const char *args, int from_tty)
   else if (section_addrs.empty ())
     gdb_printf ("\n");
 
+#ifndef CRASH_MERGE
   if (from_tty && (!query ("%s", "")))
     error (_("Not confirmed."));
+#endif
 
   objf = symbol_file_add (filename.get (), add_flags, &section_addrs,
 			  flags);
@@ -2660,6 +2709,7 @@ reread_symbols (int from_tty)
 					   objfile_name (objfile)));
 
 	      objfile->expand_all_symtabs ();
+              objfile->all_symtabs_expanded = true;
 	    }
 
 	  if (!objfile_has_symbols (objfile))
@@ -3638,6 +3688,15 @@ bfd_byte *
 symfile_relocate_debug_section (struct objfile *objfile,
 				asection *sectp, bfd_byte *buf)
 {
+#ifdef CRASH_MERGE
+  /* Executable files have all the relocations already resolved.
+   * Handle files linked with --emit-relocs.
+   * http://sources.redhat.com/ml/gdb/2006-08/msg00137.html
+   */
+  bfd *abfd = objfile->obfd.get();
+  if ((abfd->flags & EXEC_P) != 0)
+    return NULL;
+#endif
   gdb_assert (objfile->sf->sym_relocate);
 
   return (*objfile->sf->sym_relocate) (objfile, sectp, buf);
--- gdb-16.2/gdb/symtab.c.orig
+++ gdb-16.2/gdb/symtab.c
@@ -2012,6 +2012,10 @@ search_name_hash (enum language language, const char *search_name)
    variable and thus can probably assume it will never hit the C++
    code).  */
 
+#ifdef CRASH_MERGE
+static void gdb_bait_and_switch(char *, struct symbol *);
+#endif
+
 struct block_symbol
 lookup_symbol_in_language (const char *name, const struct block *block,
 			   const domain_search_flags domain,
@@ -2020,22 +2024,37 @@ lookup_symbol_in_language (const char *name, const struct block *block,
 {
   SYMBOL_LOOKUP_SCOPED_DEBUG_ENTER_EXIT;
 
+  struct block_symbol result;
   demangle_result_storage storage;
   const char *modified_name = demangle_for_lookup (name, lang, storage);
 
-  return lookup_symbol_aux (modified_name,
+  result = lookup_symbol_aux (modified_name,
 			    symbol_name_match_type::FULL,
 			    block, domain, lang,
 			    is_a_field_of_this);
+#ifdef CRASH_MERGE
+  if (result.symbol && (domain & SEARCH_TYPE_DOMAIN))
+        gdb_bait_and_switch((char *)modified_name, result.symbol);
+#endif
+  return result;
 }
 
 /* See symtab.h.  */
 
+#ifdef CRASH_MERGE
+static const struct block *gdb_get_crash_block(void);
+#endif
+
 struct block_symbol
 lookup_symbol (const char *name, const struct block *block,
 	       domain_search_flags domain,
 	       struct field_of_this_result *is_a_field_of_this)
 {
+#ifdef CRASH_MERGE
+  if (!block)
+    block = gdb_get_crash_block();
+#endif
+
   return lookup_symbol_in_language (name, block, domain,
 				    current_language->la_language,
 				    is_a_field_of_this);
@@ -3004,7 +3023,7 @@ find_pc_sect_compunit_symtab (CORE_ADDR pc, struct obj_section *section)
   for (objfile *objf : current_program_space->objfiles ())
     {
       struct compunit_symtab *result
-	= objf->find_pc_sect_compunit_symtab (msymbol, pc, section, 1);
+	= objf->find_pc_sect_compunit_symtab (msymbol, pc, section, 0);
       if (result != NULL)
 	return result;
     }
@@ -7320,3 +7339,914 @@ the use of prologue scanners."),
 					       "symtab");
   gdb::observers::free_objfile.attach (symtab_free_objfile_observer, "symtab");
 }
+
+#ifdef CRASH_MERGE
+#include "gdb-stabs.h"
+#include "gdbsupport/version.h"
+#define GDB_COMMON
+#include "../../defs.h"
+
+static void get_member_data(struct gnu_request *, struct type *, long, int);
+static void walk_enum(struct type *, struct gnu_request *);
+static void eval_enum(struct type *, struct gnu_request *);
+static void gdb_get_line_number(struct gnu_request *);
+static void gdb_get_datatype(struct gnu_request *);
+static void gdb_get_symbol_type(struct gnu_request *);
+static void gdb_command_exists(struct gnu_request *);
+static void gdb_debug_command(struct gnu_request *);
+static void gdb_function_numargs(struct gnu_request *);
+static void gdb_add_symbol_file(struct gnu_request *);
+static void gdb_delete_symbol_file(struct gnu_request *);
+static void gdb_patch_symbol_values(struct gnu_request *);
+static void get_user_print_option_address(struct gnu_request *);
+extern int get_frame_offset(CORE_ADDR);
+static void gdb_set_crash_block(struct gnu_request *);
+extern "C" void gdb_command_funnel(struct gnu_request *);
+void gdb_command_funnel_1(struct gnu_request *);
+static long lookup_struct_contents(struct gnu_request *);
+static void iterate_datatypes(struct gnu_request *);
+extern void execute_command (const char *, int);
+
+struct objfile *gdb_kernel_objfile = { 0 };
+
+static ulong gdb_merge_flags = 0;
+#define KERNEL_SYMBOLS_PATCHED (0x1)
+
+#undef STREQ
+#define STREQ(A, B)      (A && B && (strcmp(A, B) == 0))
+#define TYPE_CODE(t)        (t->code ())
+#define TYPE_TAG_NAME(t) (TYPE_MAIN_TYPE(t)->name)
+#define TYPE_NFIELDS(t) (t->num_fields ())
+#define TYPE_NAME(t) (t->name ())
+
+/*
+ *  All commands from above come through here.
+ */
+void
+gdb_command_funnel(struct gnu_request *req)
+{
+        try {
+                gdb_command_funnel_1(req);
+        } catch (const gdb_exception &ex) {
+                if (req->flags & GNU_RETURN_ON_ERROR)
+                        req->flags |= GNU_COMMAND_FAILED;
+                else
+                        throw ex;
+        }
+}
+
+void
+gdb_command_funnel_1(struct gnu_request *req)
+{
+        struct symbol *sym;
+        FILE *original_stdout_stream = nullptr;
+        FILE *original_stderr_stream = nullptr;
+
+        if (req->command != GNU_VERSION && req->command != GNU_USER_PRINT_OPTION) {
+                original_stdout_stream = (dynamic_cast< stdio_file * >gdb_stdout)->get_stream();
+                original_stderr_stream = (dynamic_cast< stdio_file * >gdb_stderr)->get_stream();
+                (dynamic_cast<stdio_file *>gdb_stdout)->set_stream(req->fp);
+                (dynamic_cast<stdio_file *>gdb_stderr)->set_stream(req->fp);
+        }
+
+        switch (req->command)
+        {
+        case GNU_VERSION:
+                req->buf = (char *)version;
+                break;
+
+        case GNU_PASS_THROUGH:
+                execute_command(req->buf,
+                        req->flags & GNU_FROM_TTY_OFF ? FALSE : TRUE);
+                break;
+
+        case GNU_USER_PRINT_OPTION:
+                get_user_print_option_address(req);
+                break;
+
+        case GNU_RESOLVE_TEXT_ADDR:
+                sym = find_pc_function(req->addr);
+                if (!sym || TYPE_CODE(sym->type()) != TYPE_CODE_FUNC)
+                        req->flags |= GNU_COMMAND_FAILED;
+                break;
+
+        case GNU_DISASSEMBLE:
+                if (req->addr2)
+                        sprintf(req->buf, "disassemble 0x%lx 0x%lx",
+                                req->addr, req->addr2);
+                else
+                        sprintf(req->buf, "disassemble 0x%lx", req->addr);
+                execute_command(req->buf, TRUE);
+                break;
+
+        case GNU_ADD_SYMBOL_FILE:
+                gdb_add_symbol_file(req);
+                break;
+
+        case GNU_DELETE_SYMBOL_FILE:
+                gdb_delete_symbol_file(req);
+                break;
+
+        case GNU_GET_LINE_NUMBER:
+                gdb_get_line_number(req);
+                break;
+
+        case GNU_GET_DATATYPE:
+                gdb_get_datatype(req);
+                break;
+
+        case GNU_GET_SYMBOL_TYPE:
+                gdb_get_symbol_type(req);
+                break;
+
+        case GNU_COMMAND_EXISTS:
+                gdb_command_exists(req);
+                break;
+
+        case GNU_ALPHA_FRAME_OFFSET:
+                req->value = 0;
+                break;
+
+        case GNU_FUNCTION_NUMARGS:
+                gdb_function_numargs(req);
+                break;
+
+        case GNU_DEBUG_COMMAND:
+                gdb_debug_command(req);
+                break;
+
+        case GNU_PATCH_SYMBOL_VALUES:
+                gdb_patch_symbol_values(req);
+                break;
+
+        case GNU_SET_CRASH_BLOCK:
+                gdb_set_crash_block(req);
+                break;
+
+        case GNU_GET_FUNCTION_RANGE:
+                {
+                        CORE_ADDR start, end;
+                        if (!find_pc_partial_function(req->pc, NULL, &start, &end))
+                                req->flags |= GNU_COMMAND_FAILED;
+                        else {
+                                req->addr = (ulong)start;
+                                req->addr2 = (ulong)end;
+                        }
+                }
+                break;
+
+        case GNU_LOOKUP_STRUCT_CONTENTS:
+                req->value = lookup_struct_contents(req);
+                break;
+
+        case GNU_ITERATE_DATATYPES:
+                iterate_datatypes(req);
+                break;
+
+        default:
+                req->flags |= GNU_COMMAND_FAILED;
+                break;
+        }
+
+        /* Restore the streams gdb output was using */
+        if (original_stdout_stream)
+            (dynamic_cast<stdio_file *>gdb_stdout)->set_stream(original_stdout_stream);
+        if (original_stderr_stream)
+            (dynamic_cast<stdio_file *>gdb_stderr)->set_stream(original_stderr_stream);
+}
+
+/*
+ *  Given a PC value, return the file and line number.
+ */
+static void
+gdb_get_line_number(struct gnu_request *req)
+{
+        struct symtab_and_line sal;
+        struct objfile *objfile;
+        CORE_ADDR pc;
+
+#define LASTCHAR(s)      (s[strlen(s)-1])
+
+        /*
+         * Prime the addrmap pump.
+         */
+        pc = req->addr;
+
+        sal = find_pc_line(pc, 0);
+
+        if (!sal.symtab) {
+                /*
+                 *  If a module address line number can't be found, it's typically
+                 *  due to its addrmap still containing offset values because its
+                 *  objfile doesn't have full symbols loaded.
+                 */
+                if (req->lm) {
+                        objfile = req->lm->loaded_objfile;
+                        if (!objfile->all_symtabs_expanded && objfile->sf) {
+                                objfile->expand_all_symtabs();
+				objfile->all_symtabs_expanded = true;
+                                sal = find_pc_line(pc, 0);
+                        }
+                }
+                if (!sal.symtab) {
+                        req->buf[0] = '\0';
+                        return;
+                }
+        }
+
+        if (sal.symtab->filename && (sal.symtab)->compunit ()->dirname ()) {
+                if (sal.symtab->filename[0] == '/')
+                        sprintf(req->buf, "%s: %d",
+                                sal.symtab->filename, sal.line);
+                else
+                        sprintf(req->buf, "%s%s%s: %d",
+                                (sal.symtab)->compunit ()->dirname (),
+                                LASTCHAR((sal.symtab)->compunit ()->dirname ()) == '/' ? "" : "/",
+                                sal.symtab->filename, sal.line);
+        }
+}
+
+
+/*
+ * Follow the type linkage for full member and value type resolution, with callback
+ */
+static void drillDownType(struct gnu_request *req, struct type *type)
+{
+        while (type)
+        {
+                /* check out for stub types and pull in the definition instead */
+                if (type->is_stub() && TYPE_TAG_NAME(type)) {
+                        struct symbol *sym;
+                        sym = lookup_symbol(TYPE_TAG_NAME(type), 0, SEARCH_STRUCT_DOMAIN, 0).symbol;
+                        if (sym)
+                                type = sym->type();
+                }
+                switch (TYPE_CODE(type)) {
+                        drill_ops_t op;
+                        long l1, l2;
+                        int typecode;
+
+                case TYPE_CODE_PTR:
+                        req->tcb(EOP_POINTER, req, 0, 0, 0, 0);
+                        break;
+
+                case TYPE_CODE_TYPEDEF:
+                        req->is_typedef = 1;
+                        req->typecode = TYPE_CODE(type);
+                        if (!req->tcb(EOP_TYPEDEF, req, TYPE_NAME(type), 0, 0, 0))
+                                return;
+                        break;
+
+                case TYPE_CODE_FUNC:
+                        req->tcb(EOP_FUNCTION, req, 0, 0, 0, 0);
+                        break;
+
+                case TYPE_CODE_ARRAY:
+                        l1 = type->length();
+                        l2 = check_typedef(type->target_type())->length();
+                        req->tcb(EOP_ARRAY, req, &l1, &l2, 0, 0);
+                        break;
+
+                case TYPE_CODE_VOID:
+                case TYPE_CODE_INT:
+                case TYPE_CODE_BOOL:
+                        l1 = type->length();
+                        req->tcb(EOP_INT, req, &l1, 0, 0, 0);
+                        break;
+
+                case TYPE_CODE_UNION:
+                        op = EOP_UNION;
+                        goto label;
+
+                case TYPE_CODE_ENUM:
+                        op = EOP_ENUM;
+                        goto label;
+
+                case TYPE_CODE_STRUCT:
+                        op = EOP_STRUCT;
+                        goto label;
+
+                default:
+                        typecode = TYPE_CODE(type);
+                        req->tcb(EOP_OOPS, req, &typecode, "Unknown typecode", 0, 0);
+                        return; /* not reached */
+
+                label:
+                        l1 = type->length();
+                        req->tcb(op, req, &l1, type, TYPE_TAG_NAME(type), 0);
+                }
+                type = type->target_type();
+        }
+        req->tcb(EOP_DONE, req, 0, 0, 0, 0);
+}
+
+/*
+ *  General purpose routine for determining datatypes.
+ */
+
+static void
+gdb_get_datatype(struct gnu_request *req)
+{
+        struct type *type;
+        struct type *typedef_type;
+        expression_up expr;
+        struct symbol *sym;
+        struct value *val;
+
+        if (gdb_CRASHDEBUG(2))
+                console("gdb_get_datatype [%s] (a)\n", req->name);
+
+        req->typecode = TYPE_CODE_UNDEF;
+
+        /*
+         *  lookup_symbol() will pick up struct and union names.
+         */
+        sym = lookup_symbol(req->name, 0, SEARCH_STRUCT_DOMAIN, 0).symbol;
+        if (sym) {
+                req->typecode = TYPE_CODE(sym->type());
+                req->length = sym->type()->length();
+                if (req->member)
+                        get_member_data(req, sym->type(), 0, 1);
+
+                if (TYPE_CODE(sym->type()) == TYPE_CODE_ENUM)
+                        walk_enum(sym->type(), req);
+
+                return;
+        }
+
+        /*
+         *  Otherwise parse the expression.
+         */
+        if (gdb_CRASHDEBUG(2))
+                console("gdb_get_datatype [%s] (b)\n", req->name);
+
+        expr = parse_expression(req->name);
+
+
+        switch (expr->first_opcode())
+        {
+        case OP_VAR_VALUE:
+                if (gdb_CRASHDEBUG(2))
+                        console("expr->first_opcode(): OP_VAR_VALUE\n");
+                type = expr->evaluate_type()->type();
+                if (req->tcb) {
+                        long value = value_as_long(expr->evaluate());
+                        /* callback with symbol value */
+                        req->typecode = TYPE_CODE(type);
+                        req->tcb(EOP_VALUE, req, &value, 0, 0, 0);
+                        drillDownType(req, type);
+                } else {
+                        if (req->flags & GNU_VAR_LENGTH_TYPECODE) {
+                                req->typecode = TYPE_CODE(type);
+                                req->length = type->length();
+                        }
+                        if (TYPE_CODE(type) == TYPE_CODE_ENUM) {
+                                req->typecode = TYPE_CODE(type);
+                                req->value = value_as_long(expr->evaluate());
+                                req->tagname = (char *)TYPE_TAG_NAME(type);
+                                if (!req->tagname) {
+                                        val = expr->evaluate_type();
+                                        eval_enum(val->type(), req);
+                                }
+                        }
+                }
+                break;
+
+          case OP_TYPE:
+                if (gdb_CRASHDEBUG(2))
+                        console("expr->first_opcode(): OP_TYPE\n");
+                    type = expr->evaluate_type()->type();
+
+                if (req->tcb) {
+                        drillDownType(req, type);
+                } else {
+                        req->typecode = TYPE_CODE(type);
+                        req->length = type->length();
+                        if (TYPE_CODE(type) == TYPE_CODE_TYPEDEF) {
+                                req->is_typedef = TYPE_CODE_TYPEDEF;
+                                if ((typedef_type = check_typedef(type))) {
+                                        req->typecode = TYPE_CODE(typedef_type);
+                                        req->length = typedef_type->length();
+                                        type = typedef_type;
+                                }
+                        }
+                        if (TYPE_CODE(type) == TYPE_CODE_ENUM)
+                                walk_enum(type, req);
+                }
+
+                if (req->member)
+                        get_member_data(req, type, 0, 1);
+
+                break;
+
+        default:
+                if (gdb_CRASHDEBUG(2))
+                        console("expr->first_opcode(): %d (?)\n",
+                                expr->first_opcode());
+                break;
+
+        }
+}
+
+/*
+ *  More robust enum list dump that gdb's, showing the value of each
+ *  identifier, each on its own line.
+ */
+static void
+walk_enum(struct type *type, struct gnu_request *req)
+{
+        int i;
+        int len, print = (req->flags & GNU_PRINT_ENUMERATORS);
+        long long lastval;
+
+        if (print) {
+                if (req->is_typedef)
+                        gdb_printf(gdb_stdout, "typedef ");
+                if (TYPE_TAG_NAME(type))
+                        gdb_printf(gdb_stdout, "enum %s {\n", TYPE_TAG_NAME (type));
+                else
+                        gdb_printf(gdb_stdout, "enum {\n");
+        }
+
+        len = TYPE_NFIELDS (type);
+        for (i = 0; i < len; i++) {
+                if (print)
+                        gdb_printf(gdb_stdout, "  %s", type->field(i).name());
+                lastval = type->field(i).loc_enumval();
+                if (print) {
+                        gdb_printf(gdb_stdout, " = %s", plongest(lastval));
+                        gdb_printf(gdb_stdout, "\n");
+                } else if (req->tcb)
+                        req->tcb(EOP_ENUMVAL, req, type->field(i).name(), &lastval, 0, 0);
+        }
+        if (print) {
+                if (TYPE_TAG_NAME(type))
+                        gdb_printf(gdb_stdout, "};\n");
+                else
+                        gdb_printf(gdb_stdout, "} %s;\n", req->name);
+        }
+}
+
+/*
+ *  Given an enum type with no tagname, determine its value.
+ */
+static void
+eval_enum(struct type *type, struct gnu_request *req)
+{
+        int i;
+        int len;
+        long long lastval;
+
+        len = TYPE_NFIELDS (type);
+        lastval = 0;
+
+        for (i = 0; i < len; i++) {
+                if (lastval != type->field(i).loc_enumval())
+                        lastval = type->field(i).loc_enumval();
+
+                if (STREQ(type->field(i).name(), req->name)) {
+                        req->tagname = "(unknown)";
+                        req->value = lastval;
+                        return;
+                }
+                lastval++;
+        }
+}
+
+/*
+ *  Walk through a struct type's list of fields looking for the desired
+ *  member field, and when found, return its relevant data.
+ */
+static void
+get_member_data(struct gnu_request *req, struct type *type, long offset, int is_first)
+{
+        short i;
+        struct field *nextfield;
+        short nfields;
+        struct type *typedef_type, *target_type;
+
+        req->member_offset = -1;
+
+        nfields = TYPE_MAIN_TYPE(type)->m_nfields;
+        nextfield = TYPE_MAIN_TYPE(type)->flds_bnds.fields;
+
+        if (nfields == 0 && is_first /* The first call */) {
+                struct type *newtype;
+                newtype = lookup_transparent_type(req->name);
+                if (newtype) {
+                        console("get_member_data(%s.%s): switching type from %lx to %lx\n",
+                                req->name, req->member, type, newtype);
+                        nfields = TYPE_MAIN_TYPE(newtype)->m_nfields;
+                        nextfield = TYPE_MAIN_TYPE(newtype)->flds_bnds.fields;
+                }
+        }
+
+        for (i = 0; i < nfields; i++) {
+                if (*nextfield->m_name == 0) { /* Anonymous struct/union */
+                        get_member_data(req, nextfield->type(),
+                            offset + nextfield->m_loc.bitpos, 0);
+                        if (req->member_offset != -1)
+                                return;
+                } else {
+                        /* callback may be just looking for a specific member name */
+                        if (req->tcb) {
+                                if (req->tcb(EOP_MEMBER_NAME, req, nextfield->m_name, 0, 0, 0)) {
+                                        long bitpos = nextfield->loc_bitpos();
+                                        long bitsize = nextfield->bitsize();
+                                        long len = nextfield->type()->length();
+                                        long byteOffset;
+                                        offset += nextfield->m_loc.bitpos;
+                                        byteOffset = offset/8;
+                                        console("EOP_MEMBER_SIZES\n");
+                                        req->tcb(EOP_MEMBER_SIZES, req, &byteOffset, &len, &bitpos, &bitsize);
+                                        /* callback with full type info */
+                                        drillDownType(req, nextfield->type());
+                                }
+                        } else if (STREQ(req->member, nextfield->m_name)) {
+                                req->member_offset = offset + nextfield->m_loc.bitpos;
+                                req->member_length = nextfield->type()->length();
+                                req->member_typecode = TYPE_CODE(nextfield->type());
+                                req->member_main_type_name = (char *)TYPE_NAME(nextfield->type());
+                                req->member_main_type_tag_name = (char *)TYPE_TAG_NAME(nextfield->type());
+                                target_type = nextfield->type()->target_type();
+                                if (target_type) {
+                                        req->member_target_type_name = (char *)TYPE_NAME(target_type);
+                                        req->member_target_type_tag_name = (char *)TYPE_TAG_NAME(target_type);
+                                }
+                                if ((req->member_typecode == TYPE_CODE_TYPEDEF) &&
+                                    (typedef_type = check_typedef(nextfield->type()))) {
+                                        req->member_length = typedef_type->length();
+                                }
+                                return;
+                        }
+                }
+                nextfield++;
+        }
+}
+
+/*
+ *  Check whether a command exists.  If it doesn't, the command will be
+ *  returned indirectly via the error_hook.
+ */
+static void
+gdb_command_exists(struct gnu_request *req)
+{
+        extern struct cmd_list_element *cmdlist;
+
+        req->value = FALSE;
+        lookup_cmd((const char **)&req->name, cmdlist, "", NULL, 0, 1);
+        req->value = TRUE;
+}
+
+static void
+gdb_function_numargs(struct gnu_request *req)
+{
+        struct symbol *sym;
+
+        sym = find_pc_function(req->pc);
+
+        if (!sym || TYPE_CODE(sym->type()) != TYPE_CODE_FUNC) {
+                req->flags |= GNU_COMMAND_FAILED;
+                return;
+        }
+
+        req->value = (ulong)TYPE_NFIELDS(sym->type());
+}
+
+struct load_module *gdb_current_load_module = NULL;
+
+static void
+gdb_add_symbol_file(struct gnu_request *req)
+{
+        struct load_module *lm;
+        int i;
+        int allsect = 0;
+        char *secname;
+        char buf[96];
+
+        gdb_current_load_module = lm = (struct load_module *)req->addr;
+
+        req->name = lm->mod_namelist;
+        gdb_delete_symbol_file(req);
+        lm->loaded_objfile = NULL;
+
+        if ((lm->mod_flags & MOD_NOPATCH) == 0) {
+                for (i = 0 ; i < lm->mod_sections; i++) {
+                    if (STREQ(lm->mod_section_data[i].name, ".text") &&
+                        (lm->mod_section_data[i].flags & SEC_FOUND))
+                            allsect = 1;
+                }
+
+                if (!allsect) {
+                    sprintf(req->buf, "add-symbol-file %s 0x%lx %s", lm->mod_namelist,
+                            lm->mod_text_start ? lm->mod_text_start : lm->mod_base,
+                            lm->mod_flags & MOD_DO_READNOW ? "-readnow" : "");
+                    if (lm->mod_data_start) {
+                            sprintf(buf, " -s .data 0x%lx", lm->mod_data_start);
+                            strcat(req->buf, buf);
+                    }
+                    if (lm->mod_bss_start) {
+                            sprintf(buf, " -s .bss 0x%lx", lm->mod_bss_start);
+                            strcat(req->buf, buf);
+                    }
+                    if (lm->mod_rodata_start) {
+                            sprintf(buf, " -s .rodata 0x%lx", lm->mod_rodata_start);
+                            strcat(req->buf, buf);
+                    }
+                } else {
+                    sprintf(req->buf, "add-symbol-file %s 0x%lx %s", lm->mod_namelist,
+                            lm->mod_text_start, lm->mod_flags & MOD_DO_READNOW ?
+                            "-readnow" : "");
+                    for (i = 0; i < lm->mod_sections; i++) {
+                            secname = lm->mod_section_data[i].name;
+                            if ((lm->mod_section_data[i].flags & SEC_FOUND) &&
+                                !STREQ(secname, ".text")) {
+                                    if (lm->mod_section_data[i].addr)
+                                        sprintf(buf, " -s %s 0x%lx", secname, lm->mod_section_data[i].addr);
+                                    else
+                                        sprintf(buf, " -s %s 0x%lx", secname,
+                                            lm->mod_section_data[i].offset + lm->mod_base);
+                                    strcat(req->buf, buf);
+                            }
+                    }
+                }
+        }
+
+        if (gdb_CRASHDEBUG(1))
+            gdb_printf(gdb_stdout, "%s\n", req->buf);
+
+               execute_command(req->buf, FALSE);
+
+        for (objfile *objfile : current_program_space->objfiles ()) {
+                if (same_file((char *)objfile_name(objfile), lm->mod_namelist)) {
+                        if (objfile->separate_debug_objfile)
+                                lm->loaded_objfile = objfile->separate_debug_objfile;
+                        else
+                                lm->loaded_objfile = objfile;
+                        break;
+                }
+        }
+
+        if (!lm->loaded_objfile)
+                req->flags |= GNU_COMMAND_FAILED;
+}
+
+static void
+gdb_delete_symbol_file(struct gnu_request *req)
+{
+        for (objfile *objfile : current_program_space->objfiles ()) {
+                if (STREQ(objfile_name(objfile), req->name) ||
+                    same_file((char *)objfile_name(objfile), req->name)) {
+                        objfile->unlink ();
+                        break;
+                }
+        }
+
+        if (gdb_CRASHDEBUG(2)) {
+                gdb_printf(gdb_stdout, "current object files:\n");
+                for (objfile *objfile : current_program_space->objfiles ())
+                        gdb_printf(gdb_stdout, "  %s\n", objfile_name(objfile));
+        }
+}
+
+/*
+ *  Walk through all minimal_symbols, patching their values with the
+ *  correct addresses.
+ */
+static void
+gdb_patch_symbol_values(struct gnu_request *req)
+{
+        req->name = PATCH_KERNEL_SYMBOLS_START;
+        patch_kernel_symbol(req);
+
+       for (objfile *objfile : current_program_space->objfiles ())
+           for (minimal_symbol *msymbol : objfile->msymbols ())
+        {
+                req->name = (char *)msymbol->m_name;
+                req->addr = (ulong)(&msymbol->m_value.ivalue);
+                if (!patch_kernel_symbol(req)) {
+                        req->flags |= GNU_COMMAND_FAILED;
+                        break;
+                }
+        }
+
+        req->name = PATCH_KERNEL_SYMBOLS_STOP;
+        patch_kernel_symbol(req);
+
+        clear_symtab_users(0);
+        gdb_merge_flags |= KERNEL_SYMBOLS_PATCHED;
+}
+
+static void
+gdb_get_symbol_type(struct gnu_request *req)
+{
+        expression_up expr;
+        struct value *val;
+        struct type *type;
+        struct type *target_type;
+
+        req->typecode = TYPE_CODE_UNDEF;
+
+        expr = parse_expression (req->name);
+        val = expr->evaluate_type();
+
+        type = val->type();
+
+        req->type_name = (char *)TYPE_MAIN_TYPE(type)->name;
+        req->typecode = TYPE_MAIN_TYPE(type)->code;
+        req->length = type->m_length;
+        req->type_tag_name = (char *)TYPE_TAG_NAME(type);
+        target_type = TYPE_MAIN_TYPE(type)->m_target_type;
+
+        if (target_type) {
+                req->target_typename = (char *)TYPE_MAIN_TYPE(target_type)->name;
+                req->target_typecode = TYPE_MAIN_TYPE(target_type)->code;
+                req->target_length = target_type->m_length;
+        }
+
+        if (req->member)
+                get_member_data(req, type, 0, 1);
+}
+
+static void
+gdb_debug_command(struct gnu_request *req)
+{
+
+}
+
+/*
+ *  Only necessary on "patched" kernel symbol sessions, and called only by
+ *  lookup_symbol(), pull a symbol value bait-and-switch operation by altering
+ *  either a data symbol's address value or a text symbol's block start address.
+ */
+static void
+gdb_bait_and_switch(char *name, struct symbol *sym)
+{
+        struct bound_minimal_symbol msym;
+        struct block *block;
+
+        if ((gdb_merge_flags & KERNEL_SYMBOLS_PATCHED) &&
+            (msym = lookup_minimal_symbol(current_program_space, name, gdb_kernel_objfile, NULL)).minsym) {
+                if (sym->aclass() == LOC_BLOCK) {
+                        block = (struct block *)(sym->value_block());
+                        block->set_start(msym.value_address());
+                } else
+                        sym->set_value_address(msym.value_address());
+        }
+}
+
+#include "valprint.h"
+
+void
+get_user_print_option_address(struct gnu_request *req)
+{
+        extern struct value_print_options user_print_options;
+
+        req->addr = 0;
+
+        if (strcmp(req->name, "output_format") == 0)
+                req->addr = (ulong)&user_print_options.output_format;
+        if (strcmp(req->name, "print_max") == 0)
+                req->addr = (ulong)&user_print_options.print_max;
+        if (strcmp(req->name, "prettyprint_structs") == 0)
+                req->addr = (ulong)&user_print_options.prettyformat_structs;
+        if (strcmp(req->name, "prettyprint_arrays") == 0)
+                req->addr = (ulong)&user_print_options.prettyformat_arrays;
+        if (strcmp(req->name, "repeat_count_threshold") == 0)
+                req->addr = (ulong)&user_print_options.repeat_count_threshold;
+        if (strcmp(req->name, "stop_print_at_null") == 0)
+                req->addr = (ulong)&user_print_options.stop_print_at_null;
+        if (strcmp(req->name, "output_radix") == 0)
+                req->addr = (ulong)&output_radix;
+}
+
+CORE_ADDR crash_text_scope;
+
+static void
+gdb_set_crash_block(struct gnu_request *req)
+{
+        if (!req->addr) {  /* debug */
+                crash_text_scope = 0;
+                return;
+        }
+
+        if ((req->addr2 = (ulong)block_for_pc(req->addr)))
+                crash_text_scope = req->addr;
+        else {
+                crash_text_scope = 0;
+                req->flags |= GNU_COMMAND_FAILED;
+        }
+}
+
+static const struct block *
+gdb_get_crash_block(void)
+{
+        if (crash_text_scope)
+                return block_for_pc(crash_text_scope);
+        else
+                return NULL;
+}
+
+static long
+lookup_struct_contents(struct gnu_request *req)
+{
+  int i;
+  long r;
+  struct field *f;
+  struct main_type *m;
+  const char *n;
+  struct main_type *top_m = (struct main_type *)req->addr;
+  char *type_name = req->type_name;
+
+  if (!top_m || !type_name)
+    return 0;
+
+  for (i = 0; i < top_m->m_nfields; i++)
+    {
+      f = top_m->flds_bnds.fields + i;
+      if (!f->type())
+        continue;
+      m = f->type()->main_type;
+
+      // If the field is an array, check the target type -
+      // it might be structure, or might not be.
+      // - struct request_sock *syn_table[0];
+      //   here m->target_type->main_type->code is expected
+      //   to be TYPE_CODE_PTR
+      // - struct list_head vec[TVN_SIZE];
+      //   here m->target_type->main_type->code should be
+      //   TYPE_CODE_STRUCT
+      if (m->code == TYPE_CODE_ARRAY && m->m_target_type)
+        m = m->m_target_type->main_type;
+
+      /* Here is a recursion.
+       * If we have struct variable (not pointer),
+       * scan this inner structure
+       */
+      if (m->code == TYPE_CODE_STRUCT) {
+        req->addr = (ulong)m;
+        r = lookup_struct_contents(req);
+        req->addr = (ulong)top_m;
+        if (r)
+          return 1;
+      }
+
+      if (m->code == TYPE_CODE_PTR && m->m_target_type)
+        m = m->m_target_type->main_type;
+      if (m->name)
+        n = m->name;
+      else
+        continue;
+
+      if (strstr(n, type_name))
+        return 1;
+    }
+
+  return 0;
+}
+
+static void
+iterate_datatypes (struct gnu_request *req)
+{
+  for (objfile *objfile : current_program_space->objfiles ())
+    {
+      if (objfile->sf) {
+        objfile->expand_all_symtabs();
+	objfile->all_symtabs_expanded = true;
+      }
+
+      for (compunit_symtab *cust : objfile->compunits ())
+        {
+          const struct blockvector *bv = cust->blockvector();
+
+          for (int i = GLOBAL_BLOCK; i <= STATIC_BLOCK; ++i)
+            {
+              const struct block *b = bv->block(i);
+
+              for (struct symbol *sym : block_iterator_range (b))
+                {
+                  QUIT;
+
+                  if (sym->aclass() != LOC_TYPEDEF)
+                    continue;
+
+                  if (req->highest &&
+                    !(req->lowest <= sym->type()->m_length && sym->type()->m_length <= req->highest))
+                        continue;
+
+                  req->addr = (ulong)(sym->type()->main_type);
+                  req->name = (char *)(sym->m_name);
+                  req->length = sym->type()->m_length;
+
+                  if (req->member) {
+                    req->value = lookup_struct_contents(req);
+                    if (!req->value)
+                      continue;
+                  }
+                  req->callback(req, req->callback_data);
+                }
+            }
+        }
+    }
+}
+#endif
--- gdb-16.2/gdb/ui-file.c.orig
+++ gdb-16.2/gdb/ui-file.c
@@ -251,6 +251,12 @@ stdio_file::~stdio_file ()
     fclose (m_file);
 }
 
+FILE*
+stdio_file::get_stream(void)
+{
+  return m_file;
+}
+
 void
 stdio_file::set_stream (FILE *file)
 {
--- gdb-16.2/gdb/ui-file.h.orig
+++ gdb-16.2/gdb/ui-file.h
@@ -273,10 +273,11 @@ class stdio_file : public ui_file
   int fd () const override
   { return m_fd; }
 
-private:
+  FILE *get_stream(void);
   /* Sets the internal stream to FILE, and saves the FILE's file
      descriptor in M_FD.  */
   void set_stream (FILE *file);
+private:
 
   /* The file.  */
   FILE *m_file;
--- gdb-16.2/gdb/xml-syscall.c.orig
+++ gdb-16.2/gdb/xml-syscall.c
@@ -36,7 +36,11 @@
 static void
 syscall_warn_user (void)
 {
+#ifdef CRASH_MERGE
+  static int have_warned = 1;
+#else
   static int have_warned = 0;
+#endif
   if (!have_warned)
     {
       have_warned = 1;
--- gdb-16.2/libiberty/Makefile.in.orig
+++ gdb-16.2/libiberty/Makefile.in
@@ -181,6 +181,7 @@ REQUIRED_OFILES =							\
 	./getruntime.$(objext) ./hashtab.$(objext) ./hex.$(objext)	\
 	./lbasename.$(objext) ./lrealpath.$(objext)			\
 	./make-relative-prefix.$(objext) ./make-temp-file.$(objext)	\
+	./mkstemps.$(objext)                                            \
 	./objalloc.$(objext)						\
 	./obstack.$(objext)						\
 	./partition.$(objext) ./pexecute.$(objext) ./physmem.$(objext)	\
@@ -214,7 +215,7 @@ CONFIGURED_OFILES = ./asprintf.$(objext) ./atexit.$(objext)		\
 	./index.$(objext) ./insque.$(objext)				\
 	./memchr.$(objext) ./memcmp.$(objext) ./memcpy.$(objext) 	\
 	./memmem.$(objext) ./memmove.$(objext)				\
-	 ./mempcpy.$(objext) ./memset.$(objext) ./mkstemps.$(objext)	\
+	 ./mempcpy.$(objext) ./memset.$(objext) 			\
 	./pex-djgpp.$(objext) ./pex-msdos.$(objext)			\
 	 ./pex-unix.$(objext) ./pex-win32.$(objext)			\
 	 ./putenv.$(objext)						\
--- gdb-16.2/opcodes/i386-dis.c.orig
+++ gdb-16.2/opcodes/i386-dis.c
@@ -9589,6 +9589,10 @@ print_insn (bfd_vma pc, disassemble_info *info, int intel_syntax)
 
       dp = &dis386_twobyte[*ins.codep];
       ins.need_modrm = twobyte_has_modrm[*ins.codep];
+      if (dp->name && ((strcmp(dp->name, "ud2a") == 0) || (strcmp(dp->name, "ud2") == 0))) {
+        extern int kernel_BUG_encoding_bytes(void);
+        ins.codep += kernel_BUG_encoding_bytes();
+      }
     }
   else
     {
--- gdb-16.2/readline/readline/misc.c.orig
+++ gdb-16.2/readline/readline/misc.c
@@ -411,7 +411,7 @@ _rl_history_set_point (void)
 
 #if defined (VI_MODE)
   if (rl_editing_mode == vi_mode && _rl_keymap != vi_insertion_keymap)
-    rl_point = 0;
+    rl_point = rl_end;
 #endif /* VI_MODE */
 
   if (rl_editing_mode == emacs_mode)
--- gdb-16.2/readline/readline/readline.h.orig
+++ gdb-16.2/readline/readline/readline.h
@@ -407,7 +407,7 @@ extern int rl_mark_active_p (void);
 #if defined (USE_VARARGS) && defined (PREFER_STDARG)
 extern int rl_message (const char *, ...)  __attribute__((__format__ (printf, 1, 2)));
 #else
-extern int rl_message ();
+extern int rl_message (void);
 #endif
 
 extern int rl_show_char (int);
--- gdb-16.2/readline/readline/rltypedefs.h.orig
+++ gdb-16.2/readline/readline/rltypedefs.h
@@ -32,10 +32,10 @@ extern "C" {
 #  define _FUNCTION_DEF
 
 #if defined(__GNUC__) || defined(__clang__)
-typedef int Function () __attribute__((deprecated));
-typedef void VFunction () __attribute__((deprecated));
-typedef char *CPFunction () __attribute__((deprecated));
-typedef char **CPPFunction () __attribute__((deprecated));
+typedef int Function (void) __attribute__ ((deprecated));
+typedef void VFunction (void) __attribute__ ((deprecated));
+typedef char *CPFunction (void) __attribute__ ((deprecated));
+typedef char **CPPFunction (void) __attribute__ ((deprecated));
 #else
 typedef int Function ();
 typedef void VFunction ();
--- gdb-16.2/readline/readline/util.c.orig
+++ gdb-16.2/readline/readline/util.c
@@ -489,10 +489,13 @@ _rl_trace (va_alist)
 
   if (_rl_tracefp == 0)
     _rl_tropen ();
+  if (!_rl_tracefp)
+    goto out;
   vfprintf (_rl_tracefp, format, args);
   fprintf (_rl_tracefp, "\n");
   fflush (_rl_tracefp);
 
+out:
   va_end (args);
 }
 
@@ -512,16 +515,17 @@ _rl_tropen (void)
 #endif
   snprintf (fnbuf, sizeof (fnbuf), "%s/rltrace.%ld", x, (long)getpid());
   unlink(fnbuf);
-  _rl_tracefp = fopen (fnbuf, "w+");
+  _rl_tracefp = fopen (fnbuf, "w+xe");
   return _rl_tracefp != 0;
 }
 
 int
 _rl_trclose (void)
 {
-  int r;
+  int r = 0;
 
-  r = fclose (_rl_tracefp);
+  if (_rl_tracefp)
+    r = fclose (_rl_tracefp);
   _rl_tracefp = 0;
   return r;
 }
--- gdb-16.2/configure.orig
+++ gdb-16.2/configure
@@ -3620,6 +3620,9 @@ case "${target}" in
     ;;
 esac

+#disable gdbserver build in crash-utility
+enable_gdbserver=no
+
 # Only allow gdbserver on some systems.
 if test -d ${srcdir}/gdbserver; then
     if test x$enable_gdbserver = x; then
--- gdb-16.2/gdb/symfile.c.orig
+++ gdb-16.2/gdb/symfile.c
@@ -341,8 +341,15 @@ place_section (bfd *abfd, asection *sect, section_offsets &offsets,
     return;

   /* If the user specified an offset, honor it.  */
-  if (offsets[gdb_bfd_section_index (abfd, sect)] != 0)
+  if (offsets[gdb_bfd_section_index (abfd, sect)] != 0) {
+    /*
+     * addr_info_make_relative() subtracts out the section VMA. But if the user
+     * specified an offset, they have already taken this into account. Add it
+     * back in
+     */
+    offsets[gdb_bfd_section_index (abfd, sect)] += bfd_section_vma(sect);
     return;
+  }

   /* Otherwise, let's try to find a place for the section.  */
   start_addr = (lowest + align - 1) & -align;
@@ -630,33 +637,6 @@ default_symfile_offsets (struct objfile *objfile,
       bfd *abfd = objfile->obfd.get ();
       asection *cur_sec;

-      for (cur_sec = abfd->sections; cur_sec != NULL; cur_sec = cur_sec->next)
-	/* We do not expect this to happen; just skip this step if the
-	   relocatable file has a section with an assigned VMA.  */
-        if (bfd_section_vma (cur_sec) != 0
-           /*
-            *  Kernel modules may have some non-zero VMAs, i.e., like the
-            *  __ksymtab and __ksymtab_gpl sections in this example:
-            *
-            *    Section Headers:
-            *      [Nr] Name              Type             Address           Offset
-            *           Size              EntSize          Flags  Link  Info  Align
-            *      ...
-            *      [ 8] __ksymtab         PROGBITS         0000000000000060  0000ad90
-            *           0000000000000010  0000000000000000   A       0     0     16
-            *      [ 9] .rela__ksymtab    RELA             0000000000000000  0000ada0
-            *           0000000000000030  0000000000000018          43     8     8
-            *      [10] __ksymtab_gpl     PROGBITS         0000000000000070  0000add0
-            *           00000000000001a0  0000000000000000   A       0     0     16
-            *      ...
-            *
-            *  but they should be treated as if they are NULL.
-            */
-            && strncmp (bfd_section_name (cur_sec), "__k", 3) != 0)
-	  break;
-
-      if (cur_sec == NULL)
-	{
	  section_offsets &offsets = objfile->section_offsets;

	  /* Pick non-overlapping offsets for sections the user did not
@@ -704,7 +684,6 @@ default_symfile_offsets (struct objfile *objfile,
					offsets[cur_sec->index]);
	      offsets[cur_sec->index] = 0;
	    }
-	}
     }

   /* Remember the bfd indexes for the .text, .data, .bss and