Merge remote-tracking branch 'remotes/quic/tags/pull-hex-20211006' into staging

Change from Philippe - Use tcg_constant_*
Change from Philippe - Remove unused TCG temp
Change from Taylor - Probe the stores in a packet at start of commit

# gpg: Signature made Wed 06 Oct 2021 08:44:13 AM PDT
# gpg:                using RSA key 7B0244FB12DE4422
# gpg: Good signature from "Taylor Simpson (Rock on) <tsimpson@quicinc.com>" [marginal]
# gpg: WARNING: This key is not certified with sufficiently trusted signatures!
# gpg:          It is not certain that the signature belongs to the owner.
# Primary key fingerprint: 3635 C788 CE62 B91F D4C5  9AB4 7B02 44FB 12DE 4422

* remotes/quic/tags/pull-hex-20211006:
  target/hexagon: Use tcg_constant_*
  target/hexagon: Remove unused TCG temporary from predicated loads
  Hexagon (target/hexagon) probe the stores in a packet at start of commit

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

2 files changed, 107 insertions, 0 deletions

diff --git a/tests/tcg/hexagon/Makefile.target b/tests/tcg/hexagon/Makefile.target
index 050cd61c1a..c1e1650798 100644
--- a/tests/tcg/hexagon/Makefile.target
+++ b/tests/tcg/hexagon/Makefile.target
@@ -28,6 +28,7 @@ first: $(HEX_SRC)/first.S
 	$(CC) -static -mv67 -nostdlib $^ -o $@
 
 HEX_TESTS = first
+HEX_TESTS += hex_sigsegv
 HEX_TESTS += misc
 HEX_TESTS += preg_alias
 HEX_TESTS += dual_stores
diff --git a/tests/tcg/hexagon/hex_sigsegv.c b/tests/tcg/hexagon/hex_sigsegv.c
new file mode 100644
index 0000000000..dc2b349257
--- /dev/null
+++ b/tests/tcg/hexagon/hex_sigsegv.c
@@ -0,0 +1,106 @@
+/*
+ *  Copyright(c) 2021 Qualcomm Innovation Center, Inc. All Rights Reserved.
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+/*
+ * Test the VLIW semantics of two stores in a packet
+ *
+ * When a packet has 2 stores, either both commit or neither commit.
+ * We test this with a packet that does stores to both NULL and a global
+ * variable, "should_not_change".  After the SIGSEGV is caught, we check
+ * that the "should_not_change" value is the same.
+ */
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <unistd.h>
+#include <sys/types.h>
+#include <fcntl.h>
+#include <setjmp.h>
+#include <signal.h>
+
+typedef unsigned char uint8_t;
+
+int err;
+int segv_caught;
+
+#define SHOULD_NOT_CHANGE_VAL        5
+int should_not_change = SHOULD_NOT_CHANGE_VAL;
+
+#define BUF_SIZE        300
+unsigned char buf[BUF_SIZE];
+
+
+static void __check(const char *filename, int line, int x, int expect)
+{
+    if (x != expect) {
+        printf("ERROR %s:%d - %d != %d\n",
+               filename, line, x, expect);
+        err++;
+    }
+}
+
+#define check(x, expect) __check(__FILE__, __LINE__, (x), (expect))
+
+static void __chk_error(const char *filename, int line, int ret)
+{
+    if (ret < 0) {
+        printf("ERROR %s:%d - %d\n", filename, line, ret);
+        err++;
+    }
+}
+
+#define chk_error(ret) __chk_error(__FILE__, __LINE__, (ret))
+
+jmp_buf jmp_env;
+
+static void sig_segv(int sig, siginfo_t *info, void *puc)
+{
+    check(sig, SIGSEGV);
+    segv_caught = 1;
+    longjmp(jmp_env, 1);
+}
+
+int main()
+{
+    struct sigaction act;
+
+    /* SIGSEGV test */
+    act.sa_sigaction = sig_segv;
+    sigemptyset(&act.sa_mask);
+    act.sa_flags = SA_SIGINFO;
+    chk_error(sigaction(SIGSEGV, &act, NULL));
+    if (setjmp(jmp_env) == 0) {
+        asm volatile("r18 = ##should_not_change\n\t"
+                     "r19 = #0\n\t"
+                     "{\n\t"
+                     "    memw(r18) = #7\n\t"
+                     "    memw(r19) = #0\n\t"
+                     "}\n\t"
+                      : : : "r18", "r19", "memory");
+    }
+
+    act.sa_handler = SIG_DFL;
+    sigemptyset(&act.sa_mask);
+    act.sa_flags = 0;
+    chk_error(sigaction(SIGSEGV, &act, NULL));
+
+    check(segv_caught, 1);
+    check(should_not_change, SHOULD_NOT_CHANGE_VAL);
+
+    puts(err ? "FAIL" : "PASS");
+    return err ? EXIT_FAILURE : EXIT_SUCCESS;
+}