1 // SPDX-License-Identifier: GPL-2.0-only
25 		  MAP_ANONYMOUS | MAP_PRIVATE, -1, 0);  in trace_buffer_allocate()
31 	tb->size = size;  in trace_buffer_allocate()
32 	tb->tail = tb->data;  in trace_buffer_allocate()
33 	tb->overflow = false;  in trace_buffer_allocate()
40 	return p < ((void *)tb + tb->size);  in trace_check_bounds()
51 	if (tb->overflow)  in trace_check_alloc()
55 		tb->overflow = true;  in trace_check_alloc()
66 	p = tb->tail;  in trace_alloc()
67 	newtail = tb->tail + bytes;  in trace_alloc()
71 	tb->tail = newtail;  in trace_alloc()
82 		e->length = payload_size;  in trace_alloc_entry()
94 		return -ENOSPC;  in trace_log_reg()
96 	e->type = TRACE_TYPE_REG;  in trace_log_reg()
97 	p = (u64 *)e->data;  in trace_log_reg()
111 		return -ENOSPC;  in trace_log_counter()
113 	e->type = TRACE_TYPE_COUNTER;  in trace_log_counter()
114 	p = (u64 *)e->data;  in trace_log_counter()
131 		return -ENOSPC;  in trace_log_string()
133 	e->type = TRACE_TYPE_STRING;  in trace_log_string()
134 	p = (char *)e->data;  in trace_log_string()
148 		return -ENOSPC;  in trace_log_indent()
150 	e->type = TRACE_TYPE_INDENT;  in trace_log_indent()
161 		return -ENOSPC;  in trace_log_outdent()
163 	e->type = TRACE_TYPE_OUTDENT;  in trace_log_outdent()
168 static void trace_print_header(int seq, int prefix)  in trace_print_header()  argument
170 	printf("%*s[%d]: ", prefix, "", seq);  in trace_print_header()
203 	char *name;  in trace_print_reg()  local
205 	p = (u64 *)e->data;  in trace_print_reg()
209 	name = trace_decode_reg(*reg);  in trace_print_reg()
210 	if (name)  in trace_print_reg()
211 		printf("register %-10s = 0x%016llx\n", name, *value);  in trace_print_reg()
220 	value = (u64 *)e->data;  in trace_print_counter()
228 	str = (char *)e->data;  in trace_print_string()
235 static void trace_print_entry(struct trace_entry *e, int seq, int *prefix)  in trace_print_entry()  argument
237 	switch (e->type) {  in trace_print_entry()
239 		trace_print_header(seq, *prefix);  in trace_print_entry()
243 		trace_print_header(seq, *prefix);  in trace_print_entry()
247 		trace_print_header(seq, *prefix);  in trace_print_entry()
251 		trace_print_header(seq, *prefix);  in trace_print_entry()
253 		*prefix += PREFIX_DELTA;  in trace_print_entry()
256 		*prefix -= PREFIX_DELTA;  in trace_print_entry()
257 		if (*prefix < BASE_PREFIX)  in trace_print_entry()
258 			*prefix = BASE_PREFIX;  in trace_print_entry()
259 		trace_print_header(seq, *prefix);  in trace_print_entry()
263 		trace_print_header(seq, *prefix);  in trace_print_entry()
264 		printf("entry @ %p type %d\n", e, e->type);  in trace_print_entry()
272 	int i, prefix;  in trace_buffer_print()  local
277 	printf("  tail     %p\n", tb->tail);  in trace_buffer_print()
278 	printf("  size     %llu\n", tb->size);  in trace_buffer_print()
279 	printf("  overflow %s\n", tb->overflow ? "TRUE" : "false");  in trace_buffer_print()
282 	p = tb->data;  in trace_buffer_print()
285 	prefix = BASE_PREFIX;  in trace_buffer_print()
287 	while (trace_check_bounds(tb, p) && p < tb->tail) {  in trace_buffer_print()
290 		trace_print_entry(e, i, &prefix);  in trace_buffer_print()
293 		p = (void *)e + sizeof(*e) + e->length;  in trace_buffer_print()
299 	printf("Trace buffer 0x%llx bytes @ %p\n", tb->size, tb);  in trace_print_location()