32 static int valid_next_sp(unsigned long sp, unsigned long prev_sp)  in valid_next_sp()  argument
34 	if (sp & 0xf)  in valid_next_sp()
36 	if (!validate_sp(sp, current, STACK_FRAME_OVERHEAD))  in valid_next_sp()
38 	if (sp >= prev_sp + STACK_FRAME_MIN_SIZE)  in valid_next_sp()
44 	if ((sp & ~(THREAD_SIZE - 1)) != (prev_sp & ~(THREAD_SIZE - 1)))  in valid_next_sp()
52 	unsigned long sp, next_sp;  in perf_callchain_kernel()  local
59 	sp = regs->gpr[1];  in perf_callchain_kernel()
62 	if (!validate_sp(sp, current, STACK_FRAME_OVERHEAD))  in perf_callchain_kernel()
66 		fp = (unsigned long *) sp;  in perf_callchain_kernel()
69 		if (next_sp == sp + STACK_INT_FRAME_SIZE &&  in perf_callchain_kernel()
75 			regs = (struct pt_regs *)(sp + STACK_FRAME_OVERHEAD);  in perf_callchain_kernel()
102 		if (!valid_next_sp(next_sp, sp))  in perf_callchain_kernel()
104 		sp = next_sp;  in perf_callchain_kernel()
187 static inline int valid_user_sp(unsigned long sp, int is_64)  in valid_user_sp()  argument
189 	if (!sp || (sp & 7) || sp > (is_64 ? TASK_SIZE : 0x100000000UL) - 32)  in valid_user_sp()
222 static int sane_signal_64_frame(unsigned long sp)  in sane_signal_64_frame()  argument
227 	sf = (struct signal_frame_64 __user *) sp;  in sane_signal_64_frame()
238 	unsigned long sp, next_sp;  in perf_callchain_user_64()  local
247 	sp = regs->gpr[1];  in perf_callchain_user_64()
251 		fp = (unsigned long __user *) sp;  in perf_callchain_user_64()
252 		if (!valid_user_sp(sp, 1) || read_user_stack_64(fp, &next_sp))  in perf_callchain_user_64()
263 		if (next_sp - sp >= sizeof(struct signal_frame_64) &&  in perf_callchain_user_64()
264 		    (is_sigreturn_64_address(next_ip, sp) ||  in perf_callchain_user_64()
265 		     (level <= 1 && is_sigreturn_64_address(lr, sp))) &&  in perf_callchain_user_64()
266 		    sane_signal_64_frame(sp)) {  in perf_callchain_user_64()
270 			sigframe = (struct signal_frame_64 __user *) sp;  in perf_callchain_user_64()
274 			    read_user_stack_64(&uregs[PT_R1], &sp))  in perf_callchain_user_64()
286 		sp = next_sp;  in perf_callchain_user_64()
332 static inline int valid_user_sp(unsigned long sp, int is_64)  in valid_user_sp()  argument
334 	if (!sp || (sp & 7) || sp > TASK_SIZE - 32)  in valid_user_sp()
388 static int sane_signal_32_frame(unsigned int sp)  in sane_signal_32_frame()  argument
393 	sf = (struct signal_frame_32 __user *) (unsigned long) sp;  in sane_signal_32_frame()
399 static int sane_rt_signal_32_frame(unsigned int sp)  in sane_rt_signal_32_frame()  argument
404 	sf = (struct rt_signal_frame_32 __user *) (unsigned long) sp;  in sane_rt_signal_32_frame()
410 static unsigned int __user *signal_frame_32_regs(unsigned int sp,  in signal_frame_32_regs()  argument
423 	if (next_sp - sp >= sizeof(struct signal_frame_32) &&  in signal_frame_32_regs()
424 	    is_sigreturn_32_address(next_ip, sp) &&  in signal_frame_32_regs()
425 	    sane_signal_32_frame(sp)) {  in signal_frame_32_regs()
426 		sf = (struct signal_frame_32 __user *) (unsigned long) sp;  in signal_frame_32_regs()
430 	if (!mctx && next_sp - sp >= sizeof(struct rt_signal_frame_32) &&  in signal_frame_32_regs()
431 	    is_rt_sigreturn_32_address(next_ip, sp) &&  in signal_frame_32_regs()
432 	    sane_rt_signal_32_frame(sp)) {  in signal_frame_32_regs()
433 		rt_sf = (struct rt_signal_frame_32 __user *) (unsigned long) sp;  in signal_frame_32_regs()
445 	unsigned int sp, next_sp;  in perf_callchain_user_32()  local
453 	sp = regs->gpr[1];  in perf_callchain_user_32()
457 		fp = (unsigned int __user *) (unsigned long) sp;  in perf_callchain_user_32()
458 		if (!valid_user_sp(sp, 0) || read_user_stack_32(fp, &next_sp))  in perf_callchain_user_32()
463 		uregs = signal_frame_32_regs(sp, next_sp, next_ip);  in perf_callchain_user_32()
465 			uregs = signal_frame_32_regs(sp, next_sp, lr);  in perf_callchain_user_32()
473 			    read_user_stack_32(&uregs[PT_R1], &sp))  in perf_callchain_user_32()
485 		sp = next_sp;  in perf_callchain_user_32()