Merge pull request #16906 from linux-on-ibm-z/s390x-relocation-fix

Mark swift sections as 1 byte aligned

Author: jckarter

stdlib/public/runtime/SwiftRT-ELF.cpp

@@ -18,10 +18,10 @@
 // by the linker.  Otherwise, we may end up with undefined symbol references as
 // the linker table section was never constructed.
 
-#define DECLARE_SWIFT_SECTION(name)                                            \
-  __asm__("\t.section " #name ",\"a\"\n");                                     \
-  __attribute__((__visibility__("hidden"))) extern const char __start_##name;  \
-  __attribute__((__visibility__("hidden"))) extern const char __stop_##name;
+#define DECLARE_SWIFT_SECTION(name)                                                          \
+  __asm__("\t.section " #name ",\"a\"\n");                                                   \
+  __attribute__((__visibility__("hidden"),__aligned__(1))) extern const char __start_##name; \
+  __attribute__((__visibility__("hidden"),__aligned__(1))) extern const char __stop_##name;
 
 extern "C" {
 DECLARE_SWIFT_SECTION(swift5_protocols)