Remove the TUI execution info window

diff --git a/gdb/testsuite/gdb.tui/basic.exp b/gdb/testsuite/gdb.tui/basic.exp
index a0054001630..f60011c386a 100644
--- a/gdb/testsuite/gdb.tui/basic.exp
+++ b/gdb/testsuite/gdb.tui/basic.exp
@@ -38,12 +38,12 @@  Term::check_contents "list main" "21 *return 0"
 # This check fails because the file name in the title overwrites the
 # box.
 setup_xfail *-*-*
-Term::check_box "source box" 3 0 77 15
+Term::check_box "source box" 0 0 80 15
 
 Term::command "layout asm"
 Term::check_contents "asm window shows main" "$hex <main>"
 
-Term::check_box "asm box" 3 0 77 15
+Term::check_box "asm box" 0 0 80 15
 
 Term::command "layout split"
 Term::check_contents "split layout contents" "21 *return 0.*$hex <main>"
@@ -51,5 +51,5 @@  Term::check_contents "split layout contents" "21 *return 0.*$hex <main>"
 # This check fails because the file name in the title overwrites the
 # box.
 setup_xfail *-*-*
-Term::check_box "source box in split layout" 3 0 77 8
-Term::check_box "asm box in split layout" 3 7 77 8
+Term::check_box "source box in split layout" 0 0 80 8
+Term::check_box "asm box in split layout" 0 7 80 8
diff --git a/gdb/testsuite/gdb.tui/empty.exp b/gdb/testsuite/gdb.tui/empty.exp
index 8c504562803..09185226a90 100644
--- a/gdb/testsuite/gdb.tui/empty.exp
+++ b/gdb/testsuite/gdb.tui/empty.exp
@@ -32,26 +32,26 @@  if {![Term::enter_tui]} {
 # 4. List of boxes in 90x40 mode
 # 5. List of test name and text for the empty window
 set layouts {
-    {src src {{3 0 77 15}} {{3 0 87 23}}
+    {src src {{0 0 80 15}} {{0 0 90 23}}
 	{{"no source" "No Source Available"}}}
-    {regs src-regs {{0 0 80 8} {3 7 77 8}} {{0 0 90 13} {3 13 87 13}}
+    {regs src-regs {{0 0 80 8} {0 7 80 8}} {{0 0 90 13} {0 13 90 13}}
 	{
 	    {"no source" "No Source Available"}
 	    {"no regs" "Register Values Unavailable"}
 	}}
-    {asm asm {{3 0 77 15}} {{3 0 87 23}}
+    {asm asm {{0 0 80 15}} {{0 0 90 23}}
 	{"no asm" "No Assembly Available"}}
-    {regs asm-regs {{0 0 80 8} {3 7 77 9}} {{0 0 90 13} {3 13 87 14}}
+    {regs asm-regs {{0 0 80 8} {0 7 80 9}} {{0 0 90 13} {0 13 90 14}}
 	{
 	    {"no asm" "No Assembly Available"}
 	    {"no regs" "Register Values Unavailable"}
 	}}
-    {split split {{3 0 77 8} {3 7 77 9}} {{3 0 87 13} {3 13 87 14}}
+    {split split {{0 0 80 8} {0 7 80 9}} {{0 0 90 13} {0 13 90 14}}
 	{
 	    {"no source" "No Source Available"}
 	    {"no asm" "No Assembly Available"}
 	}}
-    {regs split-regs {{0 0 80 8} {3 7 77 9}} {{0 0 90 13} {3 13 87 14}}
+    {regs split-regs {{0 0 80 8} {0 7 80 9}} {{0 0 90 13} {0 13 90 14}}
 	{
 	    {"no asm" "No Assembly Available"}
 	    {"no regs" "Register Values Unavailable"}
diff --git a/gdb/testsuite/lib/tuiterm.exp b/gdb/testsuite/lib/tuiterm.exp
index cd728156fc8..c6a938e227d 100644
--- a/gdb/testsuite/lib/tuiterm.exp
+++ b/gdb/testsuite/lib/tuiterm.exp
@@ -266,6 +266,13 @@  namespace eval Term {
 	}
     }
 
+    # Backward tab stops.
+    proc _csi_Z {args} {
+	set n [_default [lindex $args 0] 1]
+	variable _cur_x
+	set _cur_x [expr {max (int (($_cur_x - 1) / 8) * 8 - ($n - 1) * 8, 0)}]
+    }
+
     # Repeat.
     proc _csi_b {args} {
 	variable _last_char
diff --git a/gdb/tui/tui-disasm.c b/gdb/tui/tui-disasm.c
index 2a291831e27..1d019ca60c1 100644
--- a/gdb/tui/tui-disasm.c
+++ b/gdb/tui/tui-disasm.c
@@ -189,7 +189,7 @@  tui_disasm_window::set_contents (struct gdbarch *arch,
 
   /* Window size, excluding highlight box.  */
   max_lines = height - 2;
-  line_width = width - 2;
+  line_width = width - TUI_EXECINFO_SIZE - 2;
 
   /* Get temporary table that will hold all strings (addr & insn).  */
   asm_lines = XALLOCAVEC (struct tui_asm_line, max_lines);
diff --git a/gdb/tui/tui-source.c b/gdb/tui/tui-source.c
index 57d27aee4af..07de328bb04 100644
--- a/gdb/tui/tui-source.c
+++ b/gdb/tui/tui-source.c
@@ -137,7 +137,7 @@  tui_source_window::set_contents (struct gdbarch *arch,
       int line_width, nlines;
 
       ret = TUI_SUCCESS;
-      line_width = width - 1;
+      line_width = width - TUI_EXECINFO_SIZE - 1;
       /* Take hilite (window border) into account, when
 	 calculating the number of lines.  */
       nlines = (line_no + (height - 2)) - line_no;
diff --git a/gdb/tui/tui-winsource.c b/gdb/tui/tui-winsource.c
index 43e8a28df5a..0a3eb78bb5a 100644
--- a/gdb/tui/tui-winsource.c
+++ b/gdb/tui/tui-winsource.c
@@ -206,9 +206,6 @@  tui_source_window_base::do_erase_source_content (const char *str)
 		 (char *) str);
 
       refresh_window ();
-
-      werase (execution_info->handle);
-      execution_info->refresh_window ();
     }
 }
 
@@ -224,7 +221,7 @@  tui_show_source_line (struct tui_source_window_base *win_info, int lineno)
   if (line->is_exec_point)
     tui_set_reverse_mode (win_info->handle, true);
 
-  wmove (win_info->handle, lineno, 1);
+  wmove (win_info->handle, lineno, TUI_EXECINFO_SIZE);
   tui_puts (line->line,
 	    win_info->handle);
   if (line->is_exec_point)
@@ -268,8 +265,7 @@  tui_source_window_base::clear_detail ()
 }
 
 tui_source_window_base::tui_source_window_base (enum tui_win_type type)
-  : tui_win_info (type),
-    execution_info (new tui_exec_info_window ())
+  : tui_win_info (type)
 {
   gdb_assert (type == SRC_WIN || type == DISASSEM_WIN);
   start_line_or_addr.loa = LOA_ADDRESS;
@@ -280,18 +276,8 @@  tui_source_window_base::tui_source_window_base (enum tui_win_type type)
 tui_source_window_base::~tui_source_window_base ()
 {
   xfree (fullname);
-  delete execution_info;
 }  
 
-void
-tui_source_window_base::resize (int height, int width,
-				int origin_x, int origin_y)
-{
-  tui_gen_win_info::resize (height, width - 3,
-			    origin_x + 3, origin_y);
-  execution_info->resize (height, 3, origin_x, origin_y);
-}
-
 /* See tui-data.h.  */
 
 void
@@ -350,24 +336,6 @@  tui_source_window_base::rerender ()
 
 /* See tui-data.h.  */
 
-void
-tui_source_window_base::make_visible (bool visible)
-{
-  execution_info->make_visible (visible);
-  tui_win_info::make_visible (visible);
-}
-
-/* See tui-data.h.  */
-
-void
-tui_source_window_base::refresh_window ()
-{
-  execution_info->refresh_window ();
-  tui_win_info::refresh_window ();
-}
-
-/* See tui-data.h.  */
-
 void
 tui_source_window_base::refill ()
 {
@@ -521,7 +489,6 @@  tui_source_window_base::update_breakpoint_info
 void
 tui_source_window_base::update_exec_info ()
 {
-  werase (execution_info->handle);
   update_breakpoint_info (nullptr, true);
   for (int i = 0; i < content.size (); i++)
     {
@@ -544,7 +511,7 @@  tui_source_window_base::update_exec_info ()
       if (src_element->is_exec_point)
 	element[TUI_EXEC_POS] = '>';
 
-      mvwaddstr (execution_info->handle, i + 1, 0, element);
+      mvwaddstr (handle, i + 1, 1, element);
     }
-  execution_info->refresh_window ();
+  refresh_window ();
 }
diff --git a/gdb/tui/tui-winsource.h b/gdb/tui/tui-winsource.h
index 85e83021be1..1804ca7224a 100644
--- a/gdb/tui/tui-winsource.h
+++ b/gdb/tui/tui-winsource.h
@@ -45,16 +45,6 @@  DEF_ENUM_FLAGS_TYPE (enum tui_bp_flag, tui_bp_flags);
 
 typedef char tui_exec_info_content[TUI_EXECINFO_SIZE];
 
-/* Execution info window class.  */
-
-struct tui_exec_info_window : public tui_gen_win_info
-{
-  tui_exec_info_window ()
-    : tui_gen_win_info (EXEC_INFO_WIN)
-  {
-  }
-};
-
 /* Elements in the Source/Disassembly Window.  */
 struct tui_source_element
 {
@@ -113,8 +103,6 @@  public:
 
   void clear_detail ();
 
-  void make_visible (bool visible) override;
-  void refresh_window () override;
   void refresh_all () override;
 
   /* Refill the source window's source cache and update it.  If this
@@ -128,9 +116,6 @@  public:
 
   virtual bool location_matches_p (struct bp_location *loc, int line_no) = 0;
 
-  void resize (int height, int width,
-	       int origin_x, int origin_y) override;
-
   void show_source_content ();
 
   void update_exec_info ();
@@ -158,8 +143,6 @@  public:
   /* Erase the source content.  */
   virtual void erase_source_content () = 0;
 
-  /* Execution information window.  */
-  struct tui_exec_info_window *execution_info;
   /* Used for horizontal scroll.  */
   int horizontal_offset = 0;
   struct tui_line_or_address start_line_or_addr;
diff --git a/gdb/tui/tui.h b/gdb/tui/tui.h
index 76ab01443b7..25ae0c5e471 100644
--- a/gdb/tui/tui.h
+++ b/gdb/tui/tui.h
@@ -44,7 +44,6 @@  enum tui_win_type
   MAX_MAJOR_WINDOWS,
   /* Auxiliary windows.  */
   LOCATOR_WIN,
-  EXEC_INFO_WIN,
   DATA_ITEM_WIN
 };