1/*
2 * Copyright 2017, Data61
3 * Commonwealth Scientific and Industrial Research Organisation (CSIRO)
4 * ABN 41 687 119 230.
5 *
6 * This software may be distributed and modified according to the terms of
7 * the BSD 2-Clause license. Note that NO WARRANTY is provided.
8 * See "LICENSE_BSD2.txt" for details.
9 *
10 * @TAG(DATA61_BSD)
11 */
12
13#include <autoconf.h>
14#include <sel4debug/gen_config.h>
15#include <sel4debug/debug.h>
16#include <sel4debug/instrumentation.h>
17
18#ifdef CONFIG_LIBSEL4DEBUG_FUNCTION_INSTRUMENTATION_TRACE
19
20/* Function entry and exit printing. Useful for low effort tracing of
21 * execution.
22 *
23 * Enable this in your app by including:
24 *  NK_CFLAGS += -finstrument-functions \
25 *    -finstrument-functions-exclude-function-list=seL4_MessageInfo_get_length
26 * If you don't exclude seL4_MessageInfo_get_length, you will most likely find
27 * that __seL4_*WithMRs will not function correctly because calls to
28 * seL4_MessageInfo_get_length will be instrumented and clobber necessary
29 * registers for the following syscall.
30 */
31void __cyg_profile_func_enter(void *func, void *caller)
32{
33    debug_safe_printf("ENTER: %p called from %p\n", func, caller);
34}
35
36void __cyg_profile_func_exit(void *func, void *caller)
37{
38    debug_safe_printf("EXIT: %p returning to %p\n", func, caller);
39}
40
41#endif
42