diff --git a/gdb/testsuite/ChangeLog b/gdb/testsuite/ChangeLog
index dfc9b77..0f04109 100644
--- a/gdb/testsuite/ChangeLog
+++ b/gdb/testsuite/ChangeLog
@@ -1,3 +1,22 @@
+2015-11-10  Marcin KoÅ›cielnicki  <koriakin@0x04.net>
+
+	* gdb.trace/backtrace.exp: Use global fpreg/spreg definition, add $
+	in front.
+	* gdb.trace/change-loc.exp: Use global pcreg definition.
+	* gdb.trace/collection.exp: Use global pcreg/fpreg/spreg definition.
+	* gdb.trace/entry-values.exp: Use global spreg definition, add $
+	in front.
+	* gdb.trace/mi-trace-frame-collected.exp: Use global pcreg definition.
+	* gdb.trace/pending.exp: Likewise.
+	* gdb.trace/report.exp: Use global pcreg/fpreg/spreg definition.
+	* gdb.trace/trace-break.exp: Likewise.
+	* gdb.trace/trace-condition.exp: Use global pcreg definition, add $
+	in front.
+	* gdb.trace/unavailable.exp: Use global pcreg/fpreg/spreg definition.
+	* gdb.trace/while-dyn.exp: Use global fpreg definition, add $
+	in front.
+	* lib/trace-support.exp: Define fpreg, spreg, pcreg variables.
+
 2015-11-09  Joel Brobecker  <brobecker@adacore.com>
 
 	* gdb.ada/fin_fun_out: New testcase.
diff --git a/gdb/testsuite/gdb.trace/backtrace.exp b/gdb/testsuite/gdb.trace/backtrace.exp
index f69089b..c172029 100644
--- a/gdb/testsuite/gdb.trace/backtrace.exp
+++ b/gdb/testsuite/gdb.trace/backtrace.exp
@@ -140,23 +140,9 @@ gdb_trace_setactions "8.6: setup TP to collect regs, args, and locals" \
 	"$tdp4" \
 	"collect \$regs, \$args, \$locs" "^$"
 
-if [is_amd64_regs_target] {
-    set fpreg "\$rbp"
-    set spreg "\$rsp"
-} elseif [is_x86_like_target] {
-    set fpreg "\$ebp"
-    set spreg "\$esp"
-} elseif [is_aarch64_target] {
-    set fpreg "\$x29"
-    set spreg "\$sp"
-} else {
-    set fpreg "\$fp"
-    set spreg "\$sp"
-}
-
 gdb_trace_setactions "8.6: setup TP to collect stack mem cast expr" \
        "$tdp6" \
-       "collect $fpreg, \(\*\(void \*\*\) \($spreg\)\) @ 64" "^$"
+       "collect \$$fpreg, \(\*\(void \*\*\) \(\$$spreg\)\) @ 64" "^$"
 
 gdb_test_no_output "tstart" ""
 
diff --git a/gdb/testsuite/gdb.trace/change-loc.exp b/gdb/testsuite/gdb.trace/change-loc.exp
index a417ef9..97c604e 100644
--- a/gdb/testsuite/gdb.trace/change-loc.exp
+++ b/gdb/testsuite/gdb.trace/change-loc.exp
@@ -58,14 +58,6 @@ if { ![gdb_target_supports_trace] } then {
     return -1
 }
 
-if [is_amd64_regs_target] {
-    set pcreg "rip"
-} elseif [is_x86_like_target] {
-    set pcreg "eip"
-} else {
-    set pcreg "pc"
-}
-
 
 # Set tracepoint during tracing experiment.
 
diff --git a/gdb/testsuite/gdb.trace/collection.exp b/gdb/testsuite/gdb.trace/collection.exp
index 69ad6ee..987fb6f 100644
--- a/gdb/testsuite/gdb.trace/collection.exp
+++ b/gdb/testsuite/gdb.trace/collection.exp
@@ -36,24 +36,6 @@ if {[prepare_for_testing $testfile.exp $testfile $srcfile {debug nowarnings}]} {
 set ws "\[\r\n\t \]+"
 set cr "\[\r\n\]+"
 
-if [is_amd64_regs_target] {
-    set fpreg "rbp"
-    set spreg "rsp"
-    set pcreg "rip"
-} elseif [is_x86_like_target] {
-    set fpreg "ebp"
-    set spreg "esp"
-    set pcreg "eip"
-} elseif [is_aarch64_target] {
-    set fpreg "x29"
-    set spreg "sp"
-    set pcreg "pc"
-} else {
-    set fpreg "fp"
-    set spreg "sp"
-    set pcreg "pc"
-}
-
 #
 # Utility procs
 #
diff --git a/gdb/testsuite/gdb.trace/entry-values.exp b/gdb/testsuite/gdb.trace/entry-values.exp
index 0cf5615..07aaa22 100644
--- a/gdb/testsuite/gdb.trace/entry-values.exp
+++ b/gdb/testsuite/gdb.trace/entry-values.exp
@@ -214,20 +214,12 @@ if ![gdb_target_supports_trace] {
 
 gdb_test "trace foo" "Tracepoint $decimal at .*"
 
-if [is_amd64_regs_target] {
-    set spreg "\$rsp"
-} elseif [is_x86_like_target] {
-    set spreg "\$esp"
-} else {
-    set spreg "\$sp"
-}
-
 # Collect arguments i and j.  Collect 'global1' which is entry value
 # of argument i.  Don't collect 'global2' to test the entry value of
 # argument j.
 
 gdb_trace_setactions "set action for tracepoint 1" "" \
-    "collect i, j, global1, \(\*\(void \*\*\) \($spreg\)\) @ 64" "^$"
+    "collect i, j, global1, \(\*\(void \*\*\) \(\$$spreg\)\) @ 64" "^$"
 
 gdb_test_no_output "tstart"
 
diff --git a/gdb/testsuite/gdb.trace/mi-trace-frame-collected.exp b/gdb/testsuite/gdb.trace/mi-trace-frame-collected.exp
index a7bed0b..932a548 100644
--- a/gdb/testsuite/gdb.trace/mi-trace-frame-collected.exp
+++ b/gdb/testsuite/gdb.trace/mi-trace-frame-collected.exp
@@ -51,20 +51,6 @@ mi_gdb_test "-break-insert -a gdb_recursion_test" \
 mi_gdb_test "-trace-define-variable \$tsv 1" {.*\^done} \
     "-trace-define-variable"
 
-set pcreg ""
-if [is_amd64_regs_target] {
-    set pcreg "rip"
-} elseif [is_x86_like_target] {
-    set pcreg "eip"
-} elseif [is_aarch64_target] {
-    set pcreg "pc"
-} else {
-    # Other ports that support tracepoints should set the name of pc
-    # register here.
-    fail "set the name of pc register"
-    return -1
-}
-
 mi_gdb_test "-break-commands 3 \"collect gdb_char_test\" \"collect gdb_union1_test\" \"collect gdb_struct1_test.l\" \"collect gdb_arr_test\[0\]\" \"collect $${pcreg}\" \"teval \$tsv += 1\" \"collect \$tsv\" \"end\" " \
     {\^done} "set action"
 
diff --git a/gdb/testsuite/gdb.trace/pending.exp b/gdb/testsuite/gdb.trace/pending.exp
index 9938c5a..75e954a 100644
--- a/gdb/testsuite/gdb.trace/pending.exp
+++ b/gdb/testsuite/gdb.trace/pending.exp
@@ -421,6 +421,7 @@ proc pending_tracepoint_with_action_resolved { trace_type } \
     global srcfile
     global lib_sl1
     global gdb_prompt
+    global pcreg
 
     # Start with a fresh gdb.
     clean_restart $executable
@@ -436,13 +437,6 @@ proc pending_tracepoint_with_action_resolved { trace_type } \
 	}
     }
 
-    set pcreg "pc"
-    if [is_amd64_regs_target] {
-	set pcreg "rip"
-    } elseif [is_x86_like_target] {
-	set pcreg "eip"
-    }
-
     gdb_trace_setactions "set action for pending tracepoint" "" \
 	"collect \$$pcreg" "^$"
 
diff --git a/gdb/testsuite/gdb.trace/report.exp b/gdb/testsuite/gdb.trace/report.exp
index b3e9000..53ea943 100644
--- a/gdb/testsuite/gdb.trace/report.exp
+++ b/gdb/testsuite/gdb.trace/report.exp
@@ -150,24 +150,6 @@ gdb_trace_setactions "9.x: setup TP to collect locals" \
 	"$tdp4" \
 	"collect \$locs" "^$"
 
-if [is_amd64_regs_target] {
-    set fpreg "rbp"
-    set spreg "rsp"
-    set pcreg "rip"
-} elseif [is_x86_like_target] {
-    set fpreg "ebp"
-    set spreg "esp"
-    set pcreg "eip"
-} elseif [is_aarch64_target] {
-    set fpreg "x29"
-    set spreg "sp"
-    set pcreg "pc"
-} else {
-    set fpreg "fp"
-    set spreg "sp"
-    set pcreg "pc"
-}
-
 gdb_trace_setactions "9.x: setup TP to collect stack memory" \
 	"$tdp5" \
 	"collect \$$fpreg, \*\(void \*\*\) \$$spreg @ 64" "^$"
diff --git a/gdb/testsuite/gdb.trace/trace-break.exp b/gdb/testsuite/gdb.trace/trace-break.exp
index 1f57601..4329f3a 100644
--- a/gdb/testsuite/gdb.trace/trace-break.exp
+++ b/gdb/testsuite/gdb.trace/trace-break.exp
@@ -37,22 +37,6 @@ if ![gdb_target_supports_trace] {
     return -1
 }
 
-set fpreg "fp"
-set spreg "sp"
-set pcreg "pc"
-
-if [is_amd64_regs_target] {
-    set fpreg "rbp"
-    set spreg "rsp"
-    set pcreg "rip"
-} elseif [is_x86_like_target] {
-    set fpreg "ebp"
-    set spreg "esp"
-    set pcreg "eip"
-} elseif [is_aarch64_target] {
-    set fpreg "x29"
-}
-
 # Set breakpoint and tracepoint at the same address.
 
 proc break_trace_same_addr_1 { trace_type option } \
diff --git a/gdb/testsuite/gdb.trace/trace-condition.exp b/gdb/testsuite/gdb.trace/trace-condition.exp
index aec0401..15efb68 100644
--- a/gdb/testsuite/gdb.trace/trace-condition.exp
+++ b/gdb/testsuite/gdb.trace/trace-condition.exp
@@ -21,16 +21,6 @@ set expfile $testfile.exp
 # Some targets have leading underscores on assembly symbols.
 set additional_flags [gdb_target_symbol_prefix_flags]
 
-if [is_amd64_regs_target] {
-    set pcreg "\$rip"
-} elseif [is_x86_like_target] {
-    set pcreg "\$eip"
-} elseif [is_aarch64_target] {
-    set pcreg "\$pc"
-} else {
-    set pcreg "\$pc"
-}
-
 if [prepare_for_testing $expfile $executable $srcfile \
 	[list debug $additional_flags]] {
     untested "failed to prepare for trace tests"
@@ -139,7 +129,7 @@ proc 18955_i386_failure { trace_command } {
 foreach trace_command { "trace" "ftrace" } {
     # This condition is always true as the PC should be set to the tracepoint
     # address when hit.
-    test_tracepoints $trace_command "$pcreg == *set_point" 10
+    test_tracepoints $trace_command "\$$pcreg == *set_point" 10
 
     # Can we read local variables?
     test_tracepoints $trace_command "anarg == 100 || anarg == 200" 2 18955_x86_64_failure
diff --git a/gdb/testsuite/gdb.trace/unavailable.exp b/gdb/testsuite/gdb.trace/unavailable.exp
index 910c1dd..5f70fc5 100644
--- a/gdb/testsuite/gdb.trace/unavailable.exp
+++ b/gdb/testsuite/gdb.trace/unavailable.exp
@@ -26,24 +26,6 @@ if {[prepare_for_testing $testfile.exp $testfile $srcfile \
 set ws "\[\r\n\t \]+"
 set cr "\[\r\n\]+"
 
-if [is_amd64_regs_target] {
-    set fpreg "rbp"
-    set spreg "rsp"
-    set pcreg "rip"
-} elseif [is_x86_like_target] {
-    set fpreg "ebp"
-    set spreg "esp"
-    set pcreg "eip"
-} elseif [is_aarch64_target] {
-    set fpreg "x29"
-    set spreg "sp"
-    set pcreg "pc"
-} else {
-    set fpreg "fp"
-    set spreg "sp"
-    set pcreg "pc"
-}
-
 #
 # Utility procs
 #
diff --git a/gdb/testsuite/gdb.trace/while-dyn.exp b/gdb/testsuite/gdb.trace/while-dyn.exp
index fe4535e..765edfe 100644
--- a/gdb/testsuite/gdb.trace/while-dyn.exp
+++ b/gdb/testsuite/gdb.trace/while-dyn.exp
@@ -43,16 +43,6 @@ if { ![gdb_target_supports_trace] } then {
 # test while-stepping dynamically (live target)
 #
 
-if [is_amd64_regs_target] {
-    set fpreg "\$rbp"
-} elseif [is_x86_like_target] {
-    set fpreg "\$ebp"
-} elseif [is_aarch64_target] {
-    set fpreg "\$x29"
-} else {
-    set fpreg "\$fp"
-}
-
 proc test_while_stepping { while_stepping } {
     global fpreg
     global decimal
@@ -74,7 +64,7 @@ proc test_while_stepping { while_stepping } {
 
     gdb_trace_setactions "5.12: define $while_stepping <stepcount>" \
 	"" \
-	"collect $fpreg" "^$" \
+	"collect \$$fpreg" "^$" \
 	"$while_stepping 5" "^$" \
 	"collect p" "^$" \
 	"end" "^$" \
diff --git a/gdb/testsuite/lib/trace-support.exp b/gdb/testsuite/lib/trace-support.exp
index 0af73b4..4ec8cac 100644
--- a/gdb/testsuite/lib/trace-support.exp
+++ b/gdb/testsuite/lib/trace-support.exp
@@ -20,6 +20,29 @@
 
 
 #
+# Program counter / stack pointer / frame pointer for supported targets.
+# Used in many tests, kept here to avoid duplication.
+#
+
+if [is_amd64_regs_target] {
+    set fpreg "rbp"
+    set spreg "rsp"
+    set pcreg "rip"
+} elseif [is_x86_like_target] {
+    set fpreg "ebp"
+    set spreg "esp"
+    set pcreg "eip"
+} elseif [is_aarch64_target] {
+    set fpreg "x29"
+    set spreg "sp"
+    set pcreg "pc"
+} else {
+    set fpreg "fp"
+    set spreg "sp"
+    set pcreg "pc"
+}
+
+#
 # Procedure: gdb_target_supports_trace
 # Returns true if GDB is connected to a target that supports tracing.
 # Allows tests to abort early if not running on a trace-aware target.
