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;

     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

+

   char aLocal;

   GeckoProfilerInitRAII profilerGuard(&aLocal);