_REG_LR
u->uc_mcontext.__gregs[_REG_LR] = (__greg_t)(uintptr_t)_lwp_exit;
u->uc_mcontext.__gregs[_REG_LR] = (__greg_t)(uintptr_t)_lwp_exit;
gr[_REG_LR] = (__greg_t)(uintptr_t)_resumecontext;
u->uc_mcontext.__gregs[_REG_LR] = (uintptr_t)_lwp_exit; /* LR */
gr[_REG_LR] = (uintptr_t)_resumecontext;
gr[_REG_LR] = (__greg_t)_resumecontext;
gr[_REG_LR] = (__greg_t)_resumecontext;
gr[_REG_LR] = tf->tf_usr_lr;
tf->tf_usr_lr = gr[_REG_LR];
gr[_REG_LR] = tf->tf_lr;
tf->tf_lr = gr[_REG_LR];