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Merge branch 'bugfix/dont_log_before_bss_inited' into 'master'

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Remove ESP_EARLY_LOGI before bss is initialized; it crashes the CPU

There's an ESP_EARLY_LOGI line that can get called before the BSS is initialized; the early logging code doesn't cope well with that: it checks if FreeRTOS is up, but the variables it uses for that contains garbage because it isn't cleared yet, giving the wrong result. The logging code then tries to set a mux, crashing the entire system. This patch removes the log line and adds a warning at the BSS initialization line not to do anything complex before that point.

Fixes https://github.com/espressif/esp-idf/issues/523

See merge request !671
This commit is contained in:
Jeroen Domburg 2017-04-18 11:21:31 +08:00
commit f73c6f875c
1 changed files with 2 additions and 2 deletions
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4
components/esp32/cpu_start.c
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@ -112,6 +112,7 @@ void IRAM_ATTR call_start_cpu0()
#if !CONFIG_FREERTOS_UNICORE
rst_reas[1] = rtc_get_reset_reason(1);
#endif
// from panic handler we can be reset by RWDT or TG0WDT
if (rst_reas[0] == RTCWDT_SYS_RESET || rst_reas[0] == TG0WDT_SYS_RESET
#if !CONFIG_FREERTOS_UNICORE
@ -119,10 +120,10 @@ void IRAM_ATTR call_start_cpu0()
#endif
) {
// stop wdt in case of any
ESP_EARLY_LOGI(TAG, "Stop panic WDT");
esp_panic_wdt_stop();
}
//Clear BSS. Please do not attempt to do any complex stuff (like early logging) before this.
memset(&_bss_start, 0, (&_bss_end - &_bss_start) * sizeof(_bss_start));
/* Unless waking from deep sleep (implying RTC memory is intact), clear RTC bss */
@ -130,7 +131,6 @@ void IRAM_ATTR call_start_cpu0()
memset(&_rtc_bss_start, 0, (&_rtc_bss_end - &_rtc_bss_start) * sizeof(_rtc_bss_start));
}
ESP_EARLY_LOGI(TAG, "Pro cpu up.");
#if !CONFIG_FREERTOS_UNICORE