From 9435bd3d692c7b07e527b6a616018fa5620502e2 Mon Sep 17 00:00:00 2001
From: Hendrik Brueckner <brueckner@linux.vnet.ibm.com>
Date: Thu, 24 Sep 2015 12:47:22 +0200
Subject: [PATCH] s390: add personality support

Introduce personality support for Linux on z Systems to run
particular services with a 64-bit or 31-bit personality.

Cherry-picked from: 7517f51ef9921d3360453c8eec2c97256d320ceb
Resolves: #1300344
---
 Makefile.am                        |  1 +
 src/shared/util.c                  | 27 +++++++++++++++++++++++++++
 src/test/test-execute.c            |  8 ++++++--
 test/exec-personality-s390.service |  7 +++++++
 4 files changed, 41 insertions(+), 2 deletions(-)
 create mode 100644 test/exec-personality-s390.service

diff --git a/Makefile.am b/Makefile.am
index 2559376..3af720b 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -1483,6 +1483,7 @@ EXTRA_DIST += \
 	test/exec-ignoresigpipe-yes.service \
 	test/exec-personality-x86-64.service \
 	test/exec-personality-x86.service \
+	test/exec-personality-s390.service \
 	test/exec-privatedevices-no.service \
 	test/exec-privatedevices-yes.service \
 	test/exec-privatetmp-no.service \
diff --git a/src/shared/util.c b/src/shared/util.c
index dc51852..a24aa7f 100644
--- a/src/shared/util.c
+++ b/src/shared/util.c
@@ -6748,6 +6748,19 @@ unsigned long personality_from_string(const char *p) {
 
         if (streq(p, "x86"))
                 return PER_LINUX;
+
+#elif defined(__s390x__)
+
+        if (streq(p, "s390"))
+                return PER_LINUX32;
+
+        if (streq(p, "s390x"))
+                return PER_LINUX;
+
+#elif defined(__s390__)
+
+        if (streq(p, "s390"))
+                return PER_LINUX;
 #endif
 
         /* personality(7) documents that 0xffffffffUL is used for
@@ -6770,6 +6783,20 @@ const char* personality_to_string(unsigned long p) {
 
         if (p == PER_LINUX)
                 return "x86";
+
+#elif defined(__s390x__)
+
+        if (p == PER_LINUX)
+                return "s390x";
+
+        if (p == PER_LINUX32)
+                return "s390";
+
+#elif defined(__s390__)
+
+        if (p == PER_LINUX)
+                return "s390";
+
 #endif
 
         return NULL;
diff --git a/src/test/test-execute.c b/src/test/test-execute.c
index 91ccaf7..00f3607 100644
--- a/src/test/test-execute.c
+++ b/src/test/test-execute.c
@@ -77,10 +77,14 @@ static void test_exec_workingdirectory(Manager *m) {
 }
 
 static void test_exec_personality(Manager *m) {
-        test(m, "exec-personality-x86.service", 0, CLD_EXITED);
-
 #if defined(__x86_64__)
         test(m, "exec-personality-x86-64.service", 0, CLD_EXITED);
+
+#elif defined(__s390__)
+        test(m, "exec-personality-s390.service", 0, CLD_EXITED);
+
+#else
+        test(m, "exec-personality-x86.service", 0, CLD_EXITED);
 #endif
 }
 
diff --git a/test/exec-personality-s390.service b/test/exec-personality-s390.service
new file mode 100644
index 0000000..f3c3b03
--- /dev/null
+++ b/test/exec-personality-s390.service
@@ -0,0 +1,7 @@
+[Unit]
+Description=Test for Personality=s390
+
+[Service]
+ExecStart=/bin/sh -c 'echo $(uname -m); exit $(test $(uname -m) = "s390")'
+Type=oneshot
+Personality=s390