More tests in gdb.arch/insn-reloc.c

This patch adds more tests in gdb.arch/insn-reloc.c to cover
instruction BL and cover B.CON when CON is false.  These new added
tests can be used for displaced stepping too.

gdb/testsuite:

2015-10-12  Yao Qi  <yao.qi@linaro.org>

	* gdb.arch/insn-reloc.c (can_relocate_bcond): Rename to ...
	(can_relocate_bcond_true): ... it.
	(can_relocate_bcond_false): New function.
	(foo): Likewise.
	(can_relocate_bl): Likewise.
	(testcases) [__aarch64__]: Add can_relocate_bcond_false and
	can_relocate_bl.

2 files changed, 57 insertions, 3 deletions

diff --git a/gdb/testsuite/ChangeLog b/gdb/testsuite/ChangeLog
index fbbe7ed..afde9d3 100644
--- a/gdb/testsuite/ChangeLog
+++ b/gdb/testsuite/ChangeLog
@@ -1,3 +1,13 @@
+2015-10-12  Yao Qi  <yao.qi@linaro.org>
+
+	* gdb.arch/insn-reloc.c (can_relocate_bcond): Rename to ...
+	(can_relocate_bcond_true): ... it.
+	(can_relocate_bcond_false): New function.
+	(foo): Likewise.
+	(can_relocate_bl): Likewise.
+	(testcases) [__aarch64__]: Add can_relocate_bcond_false and
+	can_relocate_bl.
+
 2015-10-12  Pierre-Marie de Rodat  <derodat@adacore.com>
 
 	* gdb.base/nested-addr.c: New file.
diff --git a/gdb/testsuite/gdb.arch/insn-reloc.c b/gdb/testsuite/gdb.arch/insn-reloc.c
index c7148a2..dc6d8b6 100644
--- a/gdb/testsuite/gdb.arch/insn-reloc.c
+++ b/gdb/testsuite/gdb.arch/insn-reloc.c
@@ -159,7 +159,7 @@ can_relocate_b (void)
    */
 
 static void
-can_relocate_bcond (void)
+can_relocate_bcond_true (void)
 {
   int ok = 0;
 
@@ -469,6 +469,48 @@ can_relocate_ldr (void)
   else
     fail ();
 }
+
+/* Make sure we can relocate a B.cond instruction and condition is false.  */
+
+static void
+can_relocate_bcond_false (void)
+{
+  int ok = 0;
+
+  asm ("  mov x0, #8\n"
+       "  tst x0, #8\n" /* Clear the Z flag.  */
+       "set_point10:\n" /* Set tracepoint here.  */
+       "  b.eq 0b\n"    /* Condition is false.  */
+       "  mov %[ok], #1\n"
+       "  b 1f\n"
+       "0:\n"
+       "  mov %[ok], #0\n"
+       "1:\n"
+       : [ok] "=r" (ok)
+       :
+       : "0", "cc");
+
+  if (ok == 1)
+    pass ();
+  else
+    fail ();
+}
+
+static void
+foo (void)
+{
+}
+
+/* Make sure we can relocate a BL instruction.  */
+
+static void
+can_relocate_bl (void)
+{
+  asm ("set_point11:\n"
+       "  bl foo\n"
+       "  bl pass\n"); /* Test that LR is updated correctly.  */
+}
+
 #endif
 
 /* Functions testing relocations need to be placed here.  GDB will read
@@ -482,7 +524,7 @@ static testcase_ftype testcases[] = {
   can_relocate_jump
 #elif (defined __aarch64__)
   can_relocate_b,
-  can_relocate_bcond,
+  can_relocate_bcond_true,
   can_relocate_cbz,
   can_relocate_cbnz,
   can_relocate_tbz,
@@ -490,7 +532,9 @@ static testcase_ftype testcases[] = {
   can_relocate_adr_forward,
   can_relocate_adr_backward,
   can_relocate_adrp,
-  can_relocate_ldr
+  can_relocate_ldr,
+  can_relocate_bcond_false,
+  can_relocate_bl,
 #endif
 };