1 // SPDX-License-Identifier: GPL-2.0
43 			   "        -----    ----   --------\n",  in print_max_stack()
50 			size = stack_trace_index[i] - stack_trace_index[i+1];  in print_max_stack()
82  * The save_stack_trace() is called returning all the functions it finds in the
89  * Now to figure out how much each of these functions' local variable size is,
95  *        ------------------        +   -------------------
104  *     size = i == nr_entries - 1 ? stack_trace_index[i] :
105  *                    stack_trace_index[i] - stack_trace_index[i+1]
112  *     ----- ----  --------
117  * Now for architectures that might save the return address after the functions
118  * local variables (saving the link register before calling nested functions),
129  * Although the functions returned by save_stack_trace() may be the same, the
134  *        ------------------        +   -------------------
141  *   kernel_func_bar stack frame size is 29 - 19 not 30 - 29!
148  *        ------------------        +   -------------------
162 	this_size = ((unsigned long)stack) & (THREAD_SIZE-1);  in check_stack()
163 	this_size = THREAD_SIZE - this_size;  in check_stack()
165 	this_size -= frame_size;  in check_stack()
183 		this_size -= tracer_frame;  in check_stack()
187 		goto out;  in check_stack()
192 					       ARRAY_SIZE(stack_dump_trace) - 1,  in check_stack()
214 		(((unsigned long)start & ~(THREAD_SIZE-1)) + THREAD_SIZE);  in check_stack()
232 			 * this is not a stack-out-of-bounds error.  in check_stack()
237 					(top - p) * sizeof(unsigned long);  in check_stack()
245 				 * out what that is, then figure it out  in check_stack()
249 					tracer_frame = (p - stack) *  in check_stack()
251 					stack_trace_max_size -= tracer_frame;  in check_stack()
263 	 * nested functions. This means the saved return address  in check_stack()
269 			sizeof(stack_trace_index[0]) * (x - 1));  in check_stack()
270 		x--;  in check_stack()
281  out:  in check_stack()
302 		goto out;  in stack_trace_call()
306 		goto out;  in stack_trace_call()
312  out:  in stack_trace_call()
327 	unsigned long *ptr = filp->private_data;  in stack_max_size_read()
341 	long *ptr = filp->private_data;  in stack_max_size_write()
378 	long n = *pos - 1;  in __next()
383 	m->private = (void *)n;  in __next()
384 	return &m->private;  in __next()
443 			   "        -----    ----   --------\n",  in t_show()
460 		size = stack_trace_index[i] - stack_trace_index[i+1];  in t_show()
499 	struct ftrace_ops *ops = inode->i_private;  in stack_trace_filter_open()
529 		goto out;  in stack_trace_sysctl()
535  out:  in stack_trace_sysctl()