42  * stack frame and previous contents of the stack.  This allows
43  * frame unwinding in a function epilogue but only if a frame
155 	struct sigframe __user *frame = (struct sigframe __user *)regs->regs[15];  in sys_sigreturn()  local
162 	if (!access_ok(frame, sizeof(*frame)))  in sys_sigreturn()
165 	if (__get_user(set.sig[0], &frame->sc.oldmask)  in sys_sigreturn()
167 		&& __copy_from_user(&set.sig[1], &frame->extramask,  in sys_sigreturn()
168 				    sizeof(frame->extramask))))  in sys_sigreturn()
173 	if (restore_sigcontext(regs, &frame->sc, &r0))  in sys_sigreturn()
185 	struct rt_sigframe __user *frame = (struct rt_sigframe __user *)regs->regs[15];  in sys_rt_sigreturn()  local
192 	if (!access_ok(frame, sizeof(*frame)))  in sys_rt_sigreturn()
195 	if (__copy_from_user(&set, &frame->uc.uc_sigmask, sizeof(set)))  in sys_rt_sigreturn()
200 	if (restore_sigcontext(regs, &frame->uc.uc_mcontext, &r0))  in sys_rt_sigreturn()
203 	if (restore_altstack(&frame->uc.uc_stack))  in sys_rt_sigreturn()
214  * Set up a signal frame.
269 	struct sigframe __user *frame;  in setup_frame()  local
272 	frame = get_sigframe(&ksig->ka, regs->regs[15], sizeof(*frame));  in setup_frame()
274 	if (!access_ok(frame, sizeof(*frame)))  in setup_frame()
277 	err |= setup_sigcontext(&frame->sc, regs, set->sig[0]);  in setup_frame()
280 		err |= __copy_to_user(frame->extramask, &set->sig[1],  in setup_frame()
281 				      sizeof(frame->extramask));  in setup_frame()
293 		err |= __put_user(MOVW(7), &frame->retcode[0]);  in setup_frame()
294 		err |= __put_user(TRAP_NOARG, &frame->retcode[1]);  in setup_frame()
295 		err |= __put_user(OR_R0_R0, &frame->retcode[2]);  in setup_frame()
296 		err |= __put_user(OR_R0_R0, &frame->retcode[3]);  in setup_frame()
297 		err |= __put_user(OR_R0_R0, &frame->retcode[4]);  in setup_frame()
298 		err |= __put_user(OR_R0_R0, &frame->retcode[5]);  in setup_frame()
299 		err |= __put_user(OR_R0_R0, &frame->retcode[6]);  in setup_frame()
300 		err |= __put_user((__NR_sigreturn), &frame->retcode[7]);  in setup_frame()
301 		regs->pr = (unsigned long) frame->retcode;  in setup_frame()
302 		flush_icache_range(regs->pr, regs->pr + sizeof(frame->retcode));  in setup_frame()
309 	regs->regs[15] = (unsigned long) frame;  in setup_frame()
312 	regs->regs[6] = (unsigned long) &frame->sc;  in setup_frame()
327 		 current->comm, task_pid_nr(current), frame, regs->pc, regs->pr);  in setup_frame()
335 	struct rt_sigframe __user *frame;  in setup_rt_frame()  local
338 	frame = get_sigframe(&ksig->ka, regs->regs[15], sizeof(*frame));  in setup_rt_frame()
340 	if (!access_ok(frame, sizeof(*frame)))  in setup_rt_frame()
343 	err |= copy_siginfo_to_user(&frame->info, &ksig->info);  in setup_rt_frame()
346 	err |= __put_user(0, &frame->uc.uc_flags);  in setup_rt_frame()
347 	err |= __put_user(NULL, &frame->uc.uc_link);  in setup_rt_frame()
348 	err |= __save_altstack(&frame->uc.uc_stack, regs->regs[15]);  in setup_rt_frame()
349 	err |= setup_sigcontext(&frame->uc.uc_mcontext,  in setup_rt_frame()
351 	err |= __copy_to_user(&frame->uc.uc_sigmask, set, sizeof(*set));  in setup_rt_frame()
363 		err |= __put_user(MOVW(7), &frame->retcode[0]);  in setup_rt_frame()
364 		err |= __put_user(TRAP_NOARG, &frame->retcode[1]);  in setup_rt_frame()
365 		err |= __put_user(OR_R0_R0, &frame->retcode[2]);  in setup_rt_frame()
366 		err |= __put_user(OR_R0_R0, &frame->retcode[3]);  in setup_rt_frame()
367 		err |= __put_user(OR_R0_R0, &frame->retcode[4]);  in setup_rt_frame()
368 		err |= __put_user(OR_R0_R0, &frame->retcode[5]);  in setup_rt_frame()
369 		err |= __put_user(OR_R0_R0, &frame->retcode[6]);  in setup_rt_frame()
370 		err |= __put_user((__NR_rt_sigreturn), &frame->retcode[7]);  in setup_rt_frame()
371 		regs->pr = (unsigned long) frame->retcode;  in setup_rt_frame()
372 		flush_icache_range(regs->pr, regs->pr + sizeof(frame->retcode));  in setup_rt_frame()
379 	regs->regs[15] = (unsigned long) frame;  in setup_rt_frame()
381 	regs->regs[5] = (unsigned long) &frame->info;  in setup_rt_frame()
382 	regs->regs[6] = (unsigned long) &frame->uc;  in setup_rt_frame()
397 		 current->comm, task_pid_nr(current), frame, regs->pc, regs->pr);  in setup_rt_frame()
438 	/* Set up the stack frame */  in handle_signal()