gdb: Add tracepoint support for powerpc.

gdb/gdbserver/ChangeLog:

	* linux-ppc-low.c (ppc_supports_tracepoints): New function.
	(struct linux_target_ops): Wire in the above.

gdb/testsuite/ChangeLog:

	* gdb.trace/ftrace.exp: Set arg0exp for ppc.
	* gdb.trace/mi-trace-unavailable.exp: Set pcnum for ppc.
	* gdb.trace/pending.exp: Accept leading dot before function name.
	* gdb.trace/trace-common.h: Add fast tracepoint dummy insn for ppc.
	* lib/trace-support.exp: Set registers for ppc.

6 files changed, 19 insertions, 2 deletions

diff --git a/gdb/testsuite/ChangeLog b/gdb/testsuite/ChangeLog
index 6704253..644a6f1 100644
--- a/gdb/testsuite/ChangeLog
+++ b/gdb/testsuite/ChangeLog
@@ -1,5 +1,13 @@
 2016-03-09  Marcin Kościelnicki  <koriakin@0x04.net>
 
+	* gdb.trace/ftrace.exp: Set arg0exp for ppc.
+	* gdb.trace/mi-trace-unavailable.exp: Set pcnum for ppc.
+	* gdb.trace/pending.exp: Accept leading dot before function name.
+	* gdb.trace/trace-common.h: Add fast tracepoint dummy insn for ppc.
+	* lib/trace-support.exp: Set registers for ppc.
+
+2016-03-09  Marcin Kościelnicki  <koriakin@0x04.net>
+
 	* gdb.trace/entry-values.exp: Link ${binfile}1.o to ${binfile}1 and
 	use it for disassembly; accept .main in addition to main in backtrace.
 
diff --git a/gdb/testsuite/gdb.trace/ftrace.exp b/gdb/testsuite/gdb.trace/ftrace.exp
index a1d4771..349f4e2 100644
--- a/gdb/testsuite/gdb.trace/ftrace.exp
+++ b/gdb/testsuite/gdb.trace/ftrace.exp
@@ -242,6 +242,8 @@ if [is_amd64_regs_target] {
     set arg0exp "*(int *) (\$ebp + 8)"
 } elseif { [istarget "aarch64*-*-*"] } {
     set arg0exp "\$x0"
+} elseif [istarget "powerpc*-*-*"] {
+    set arg0exp "\$r3"
 } else {
     set arg0exp ""
 }
diff --git a/gdb/testsuite/gdb.trace/mi-trace-unavailable.exp b/gdb/testsuite/gdb.trace/mi-trace-unavailable.exp
index 82c6101..4228c97 100644
--- a/gdb/testsuite/gdb.trace/mi-trace-unavailable.exp
+++ b/gdb/testsuite/gdb.trace/mi-trace-unavailable.exp
@@ -137,6 +137,8 @@ proc test_trace_unavailable { data_source } {
 	    set pcnum 8
 	} elseif [is_aarch64_target] {
 	    set pcnum 32
+	} elseif [istarget "powerpc*-*-*"] {
+	    set pcnum 64
 	} else {
 	    # Other ports support tracepoint should define the number
 	    # of its own pc register.
diff --git a/gdb/testsuite/gdb.trace/pending.exp b/gdb/testsuite/gdb.trace/pending.exp
index 3ef752f..43f4c60 100644
--- a/gdb/testsuite/gdb.trace/pending.exp
+++ b/gdb/testsuite/gdb.trace/pending.exp
@@ -307,7 +307,8 @@ proc pending_tracepoint_installed_during_trace { trace_type } \
 \[0-9\]+\[\t \]+\(fast |\)tracepoint\[ \]+keep y.*pendfunc2.*" \
 	"tracepoint is resolved"
 
-    gdb_test "tfind start" "#0  $hex in pendfunc2 .*" "tfind test frame 0"
+    # powerpc64 shows "in .pendfunc2" here.
+    gdb_test "tfind start" "#0  $hex in .?pendfunc2 .*" "tfind test frame 0"
     gdb_test "tfind" "Target failed to find requested trace frame..*" "tfind test frame"
 }}
 
diff --git a/gdb/testsuite/gdb.trace/trace-common.h b/gdb/testsuite/gdb.trace/trace-common.h
index eceb182..fa99fd9 100644
--- a/gdb/testsuite/gdb.trace/trace-common.h
+++ b/gdb/testsuite/gdb.trace/trace-common.h
@@ -40,7 +40,7 @@ x86_trace_dummy ()
        "    call " SYMBOL(x86_trace_dummy) "\n" \
        )
 
-#elif (defined __aarch64__)
+#elif (defined __aarch64__) || (defined __powerpc__)
 
 #define FAST_TRACEPOINT_LABEL(name) \
   asm ("    .global " SYMBOL(name) "\n" \
diff --git a/gdb/testsuite/lib/trace-support.exp b/gdb/testsuite/lib/trace-support.exp
index f593c43..372a595 100644
--- a/gdb/testsuite/lib/trace-support.exp
+++ b/gdb/testsuite/lib/trace-support.exp
@@ -36,6 +36,10 @@ if [is_amd64_regs_target] {
     set fpreg "x29"
     set spreg "sp"
     set pcreg "pc"
+} elseif [istarget "powerpc*-*-*"] {
+    set fpreg "r31"
+    set spreg "r1"
+    set pcreg "pc"
 } else {
     set fpreg "fp"
     set spreg "sp"