[PATCH][gdb/testsuite] Handle SIGILL in two gdb.arch powerpc test-cases

[Tom de Vries via Gdb-patches <gdb-patches@sourceware.org>]

Hi,

On powerpc64le-linux, with test-case gdb.arch/powerpc-addpcis.exp I run into
SIGILL:
...
(gdb) PASS: gdb.arch/powerpc-addpcis.exp: get hexadecimal valueof "$r3"
stepi^M
^M
Program terminated with signal SIGILL, Illegal instruction.^M
The program no longer exists.^M
(gdb) PASS: gdb.arch/powerpc-addpcis.exp: set r4
...
because it's a power9 insn, and I'm running on a power8 machine.

Fix this by handling the SIGILL.  Likewise in gdb.arch/powerpc-lnia.exp.

Tested on powerpc64le-linux.

Any comments?

Thanks,
- Tom

[gdb/testsuite] Handle SIGILL in two gdb.arch powerpc test-cases

---
 gdb/testsuite/gdb.arch/powerpc-addpcis.exp | 14 +++++++++++++-
 gdb/testsuite/gdb.arch/powerpc-lnia.exp    | 14 +++++++++++++-
 2 files changed, 26 insertions(+), 2 deletions(-)

diff --git a/gdb/testsuite/gdb.arch/powerpc-addpcis.exp b/gdb/testsuite/gdb.arch/powerpc-addpcis.exp
index d1bc7f49ce6..ff7052ce475 100644
--- a/gdb/testsuite/gdb.arch/powerpc-addpcis.exp
+++ b/gdb/testsuite/gdb.arch/powerpc-addpcis.exp
@@ -50,7 +50,19 @@ gdb_breakpoint $bp1
 gdb_breakpoint $bp2
 gdb_breakpoint $bp3
 
-gdb_test "stepi" "" "set r3 "
+set insn_supported 1
+gdb_test_multiple "stepi" "set r3" {
+    -re "Program received signal SIGILL, Illegal instruction\\..*" {
+	set insn_supported 0
+    }
+    -re -wrap "" {
+	pass $gdb_test_name
+    }
+}
+if { ! $insn_supported } {
+    unsupported "illegal instruction"
+    return
+}
 set check_r3 [get_hexadecimal_valueof "\$r3" "default0"]
 gdb_test "stepi" "" "set r4"
 set check_r4 [get_hexadecimal_valueof "\$r4" "default0"]
diff --git a/gdb/testsuite/gdb.arch/powerpc-lnia.exp b/gdb/testsuite/gdb.arch/powerpc-lnia.exp
index 0f56d834046..4ab4f8d92be 100644
--- a/gdb/testsuite/gdb.arch/powerpc-lnia.exp
+++ b/gdb/testsuite/gdb.arch/powerpc-lnia.exp
@@ -54,7 +54,19 @@ gdb_breakpoint $bp3
 
 # single-step through the lnia instructions, and retrieve the
 # register values as we proceed.
-gdb_test "stepi" "" "set r3"
+set insn_supported 1
+gdb_test_multiple "stepi" "set r3" {
+    -re "Program received signal SIGILL, Illegal instruction\\..*" {
+	set insn_supported 0
+    }
+    -re -wrap "" {
+	pass $gdb_test_name
+    }
+}
+if { ! $insn_supported } {
+    unsupported "illegal instruction"
+    return
+}
 set check_r3 [get_hexadecimal_valueof "\$r3" "default0"]
 gdb_test "stepi" "" "set r4"
 set check_r4 [get_hexadecimal_valueof "\$r4" "default0"]