[RFA]: Fix gdb.base/printcmds.exp for targets that initialize data during crt0

[Stephane Carrez <Stephane dot Carrez at worldnet dot fr>]

Hi!

For targets that initialize the data section during the crt0, the data
section is not loaded and therefore not valid until we reach the main.
This is typically what happens when you have a ROM, the data section has
its image in ROM, and the ROM data image is copied in RAM before the main
(by the crt0) (see GNU ld for linker script details).

The gdb.base/printcmds.exp test checks the 'ctable1' table which is in data
section before running the program to the main.  This causes a failure
for the targets that behave as described above.

In the patch, I propose to add a configuration variable 'gdb,noloaddata'
(see also my previous patches), that indicates the data section is not loaded
until we reach the main.  The test checks for that and looks at the ctable1
array after the main if that's the case.

OK to commit?

	Stephane

2001-05-20  Stephane Carrez  <Stephane.Carrez@worldnet.fr>

	* gdb.base/printcmds.exp: Print ctable1 before the main only for
	targets not marked with gdb,noloaddata; Print ctable1 when we
	reach the main.
Index: gdb.base/printcmds.exp
===================================================================
RCS file: /cvs/src/src/gdb/testsuite/gdb.base/printcmds.exp,v
retrieving revision 1.4
diff -u -p -r1.4 printcmds.exp
--- printcmds.exp	2001/03/06 08:21:51	1.4
+++ printcmds.exp	2001/05/20 15:29:39
@@ -1,4 +1,4 @@
-# Copyright 1992, 1994, 1995, 1996, 1997, 1999, 2000
+# Copyright 1992, 1994, 1995, 1996, 1997, 1999, 2000, 2001
 # Free Software Foundation, Inc.
 
 # This program is free software; you can redistribute it and/or modify
@@ -707,9 +707,14 @@ gdb_test "set print address off" ""
 gdb_test "set width 0" ""
 
 if [set_lang_c] then {
-    gdb_test "p ctable1\[120\]" "120 'x'" "p ctable1\[120\] #1"
-
+    # Don't check ctable1 for targets that set the data section in
+    # the crt0 (before main).  For these targets, we must go to the
+    # main do to this (next tests).
+    if ![target_info exists gdb,noloaddata] then {
+        gdb_test "p ctable1\[120\]" "120 'x'" "p ctable1\[120\] #1"
+    }
     if [runto_main] then {
+	gdb_test "p ctable1\[120\]" "120 'x'" "p ctable1\[120\] #1"
 	test_integer_literals_accepted
 	test_integer_literals_rejected
 	test_character_literals_accepted