" nop 5\n");
#else
// Assembly wrapper to call __gnu_end_cleanup without clobbering r1-r3.
-// Also push r4 to preserve stack alignment.
+// Also push lr to preserve stack alignment and to allow backtracing.
#ifdef __thumb__
asm (" .pushsection .text.__cxa_end_cleanup\n"
" .global __cxa_end_cleanup\n"
" .type __cxa_end_cleanup, \"function\"\n"
" .thumb_func\n"
"__cxa_end_cleanup:\n"
-" push\t{r1, r2, r3, r4}\n"
+" .fnstart\n"
+" push\t{r1, r2, r3, lr}\n"
+" .save\t{r1, r2, r3, lr}\n"
" bl\t__gnu_end_cleanup\n"
-" pop\t{r1, r2, r3, r4}\n"
+" pop\t{r1, r2, r3, lr}\n"
" bl\t_Unwind_Resume @ Never returns\n"
+" .fnend\n"
" .popsection\n");
#else
asm (" .pushsection .text.__cxa_end_cleanup\n"
" .global __cxa_end_cleanup\n"
" .type __cxa_end_cleanup, \"function\"\n"
"__cxa_end_cleanup:\n"
-" stmfd\tsp!, {r1, r2, r3, r4}\n"
+" .fnstart\n"
+" stmfd\tsp!, {r1, r2, r3, lr}\n"
+" .save\t{r1, r2, r3, lr}\n"
" bl\t__gnu_end_cleanup\n"
-" ldmfd\tsp!, {r1, r2, r3, r4}\n"
+" ldmfd\tsp!, {r1, r2, r3, lr}\n"
" bl\t_Unwind_Resume @ Never returns\n"
+" .fnend\n"
" .popsection\n");
#endif
#endif