Adds asm("ta 6") which suppresses bus error caused by misalignment.

diff --git a/js/xpconnect/src/XPCShellImpl.cpp b/js/xpconnect/src/XPCShellImpl.cpp
--- a/js/xpconnect/src/XPCShellImpl.cpp
+++ b/js/xpconnect/src/XPCShellImpl.cpp
@@ -1320,16 +1320,22 @@ GetCurrentWorkingDirectory(nsAString& wo
     return true;
 }
 
 static JSSecurityCallbacks shellSecurityCallbacks;
 
 int
 XRE_XPCShellMain(int argc, char** argv, char** envp)
 {
+
+#if defined (__GNUC__) && (defined(__sparc) || defined(__sparc__))
+    // make unaligned memory access no crash
+    asm ( "ta 6" );
+#endif
+
     JSRuntime* rt;
     JSContext* cx;
     int result = 0;
     nsresult rv;
 
     gErrFile = stderr;
     gOutFile = stdout;
     gInFile = stdin;
diff --git a/memory/mozjemalloc/jemalloc.c b/memory/mozjemalloc/jemalloc.c
--- a/memory/mozjemalloc/jemalloc.c
+++ b/memory/mozjemalloc/jemalloc.c
@@ -5551,16 +5551,22 @@ malloc_init(void)
 #endif
 
 #if !defined(MOZ_MEMORY_WINDOWS)
 static
 #endif
 bool
 malloc_init_hard(void)
 {
+
+#if defined (__GNUC__) && (defined(__sparc) || defined(__sparc__))
+    // make unaligned memory access no crash
+    asm ( "ta 6" );
+#endif
+
 	unsigned i;
 	char buf[PATH_MAX + 1];
 	const char *opts;
 	long result;
 #ifndef MOZ_MEMORY_WINDOWS
 	int linklen;
 #endif
 #ifdef MOZ_MEMORY_DARWIN
diff --git a/toolkit/xre/nsAppRunner.cpp b/toolkit/xre/nsAppRunner.cpp
--- a/toolkit/xre/nsAppRunner.cpp
+++ b/toolkit/xre/nsAppRunner.cpp
@@ -4255,6 +4255,11 @@
 int
 XREMain::XRE_main(int argc, char* argv[], const nsXREAppData* aAppData)
 {
+#if defined (__GNUC__) && (defined(__sparc) || defined(__sparc__))
+    // make unaligned memory access no crash
+    asm ( "ta 6" );
+#endif
+
   ScopedLogging log;
 
 #if defined(MOZ_SANDBOX) && defined(XP_LINUX) && !defined(ANDROID)