[PATCH][testsuite] Match symbol on address 0x0

[Yao Qi]

We see the failing fails on arm-none-eabi target,

print (void*)v_signed_char^M
$190 = (void *) 0x0 <_ftext>^M
(gdb) FAIL: gdb.base/exprs.exp: print (void*)v_signed_char (print
(void*)v_signed_char)

GDB behaves correctly but the test assumes there is no symbol on
address 0x0.  That is not correct on bare metal targets.

(gdb) info symbol 0x0
_ftext in section .text

This patch is to relax the pattern to match the possible symbol on
address 0x0.  OK?

gdb/testsuite:

2014-07-11  Yao Qi  <yao@codesourcery.com>

	* gdb.base/exprs.exp: Match the possible symbol on address
	0x0.
---
 gdb/testsuite/gdb.base/exprs.exp | 16 ++++++++--------
 1 file changed, 8 insertions(+), 8 deletions(-)

diff --git a/gdb/testsuite/gdb.base/exprs.exp b/gdb/testsuite/gdb.base/exprs.exp
index ebce24f..1006aa1 100644
--- a/gdb/testsuite/gdb.base/exprs.exp
+++ b/gdb/testsuite/gdb.base/exprs.exp
@@ -201,14 +201,14 @@ test_expr "set variable v_unsigned_long=~0" "print v_unsigned_long > 0" "\\$\[0-
 # NB: Some architectures convert a ``NULL'' pointer into
 #     something else. Don't simply test for 0.
 #
-test_expr "set variable v_signed_char = 0" "print (void*)v_signed_char" "\\$\[0-9\]* = .void \\*. $hex" "print (void*)v_signed_char"
-test_expr "set variable v_signed_short = 0" "print (void*)v_signed_short" "\\$\[0-9\]* = .void \\*. $hex" "print (void*)v_signed_short"
-test_expr "set variable v_signed_int = 0" "print (void*)v_signed_int" "\\$\[0-9\]* = .void \\*. $hex" "print (void*)v_signed_int"
-test_expr "set variable v_signed_long = 0" "print (void*)v_signed_long" "\\$\[0-9\]* = .void \\*. $hex" "print (void*)v_signed_long"
-test_expr "set variable v_unsigned_char = 0" "print (void*)v_unsigned_char" "\\$\[0-9\]* = .void \\*. $hex" "print (void*)v_unsigned_char"
-test_expr "set variable v_unsigned_short = 0" "print (void*)v_unsigned_short" "\\$\[0-9\]* = .void \\*. $hex" "print (void*)v_unsigned_short"
-test_expr "set variable v_unsigned_int = 0" "print (void*)v_unsigned_int" "\\$\[0-9\]* = .void \\*. $hex" "print (void*)v_unsigned_int"
-test_expr "set variable v_unsigned_long = 0" "print (void*)v_unsigned_long" "\\$\[0-9\]* = .void \\*. $hex" "print (void*)v_unsigned_long"
+test_expr "set variable v_signed_char = 0" "print (void*)v_signed_char" "\\$\[0-9\]* = .void \\*. ${hex}(| <.*>)" "print (void*)v_signed_char"
+test_expr "set variable v_signed_short = 0" "print (void*)v_signed_short" "\\$\[0-9\]* = .void \\*. ${hex}(| <.*>)" "print (void*)v_signed_short"
+test_expr "set variable v_signed_int = 0" "print (void*)v_signed_int" "\\$\[0-9\]* = .void \\*. ${hex}(| <.*>)" "print (void*)v_signed_int"
+test_expr "set variable v_signed_long = 0" "print (void*)v_signed_long" "\\$\[0-9\]* = .void \\*. ${hex}(| <.*>)" "print (void*)v_signed_long"
+test_expr "set variable v_unsigned_char = 0" "print (void*)v_unsigned_char" "\\$\[0-9\]* = .void \\*. ${hex}(| <.*>)" "print (void*)v_unsigned_char"
+test_expr "set variable v_unsigned_short = 0" "print (void*)v_unsigned_short" "\\$\[0-9\]* = .void \\*. ${hex}(| <.*>)" "print (void*)v_unsigned_short"
+test_expr "set variable v_unsigned_int = 0" "print (void*)v_unsigned_int" "\\$\[0-9\]* = .void \\*. ${hex}(| <.*>)" "print (void*)v_unsigned_int"
+test_expr "set variable v_unsigned_long = 0" "print (void*)v_unsigned_long" "\\$\[0-9\]* = .void \\*. ${hex}(| <.*>)" "print (void*)v_unsigned_long"
 #
 # Test expressions with pointers out of range
 #
-- 
1.9.0