diff options
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/trace.c | 19 |
1 files changed, 17 insertions, 2 deletions
diff --git a/lib/trace.c b/lib/trace.c index 2e2c1bed54f..12dae2089a4 100644 --- a/lib/trace.c +++ b/lib/trace.c @@ -321,6 +321,17 @@ void notrace trace_set_enabled(int enabled) trace_enabled = enabled != 0; } +static int get_func_count(void) +{ + /* Detect no support for mon_len since this means tracing cannot work */ + if (IS_ENABLED(CONFIG_SANDBOX) && !gd->mon_len) { + puts("Tracing is not supported on this board\n"); + return -ENOTSUPP; + } + + return gd->mon_len / FUNC_SITE_SIZE; +} + /** * trace_init() - initialize the tracing system and enable it * @@ -330,10 +341,12 @@ void notrace trace_set_enabled(int enabled) */ int notrace trace_init(void *buff, size_t buff_size) { - ulong func_count = gd->mon_len / FUNC_SITE_SIZE; + int func_count = get_func_count(); size_t needed; int was_disabled = !trace_enabled; + if (func_count < 0) + return func_count; trace_save_gd(); if (!was_disabled) { @@ -393,10 +406,12 @@ int notrace trace_init(void *buff, size_t buff_size) */ int notrace trace_early_init(void) { - ulong func_count = gd->mon_len / FUNC_SITE_SIZE; + int func_count = get_func_count(); size_t buff_size = CONFIG_TRACE_EARLY_SIZE; size_t needed; + if (func_count < 0) + return func_count; /* We can ignore additional calls to this function */ if (trace_enabled) return 0; |