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reset_reason: fix setting wake stub entry point to 0x80000000

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esp_reset_reason_init would check for reset reason hint, and
unconditionally set RTC_RESET_CAUSE_REG (which is also
RTC_ENTRY_ADDR_REG) to hint value 0, i.e. 0x80000000. However the ROM
code treats this value as valid deep sleep wake stub entry point, and
tries to jump to it.

Clear RTC_RESET_CAUSE_REG only if it contained a valid reset reason
hint, and simply set the register value to 0 when doing so. Also add
a check to esp_get_deep_sleep_wake_stub function that deep sleep wake
stub entry address must be in IRAM.

Reported in https://esp32.com/viewtopic.php?f=13&t=6919.
This commit is contained in:
Ivan Grokhotkov
2018-08-27 08:12:28 +08:00
parent 147b349799
commit 6dae5b206f
3 changed files with 86 additions and 5 deletions
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9
components/esp32/sleep_modes.c
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@@ -103,11 +103,14 @@ esp_deep_sleep_wake_stub_fn_t esp_get_deep_sleep_wake_stub(void)
REG_WRITE(RTC_MEMORY_CRC_REG, stored_crc);
_lock_release(&lock_rtc_memory_crc);
if(stored_crc == calc_crc) {
return (esp_deep_sleep_wake_stub_fn_t)REG_READ(RTC_ENTRY_ADDR_REG);
} else {
if(stored_crc != calc_crc) {
return NULL;
}
esp_deep_sleep_wake_stub_fn_t stub_ptr = (esp_deep_sleep_wake_stub_fn_t) REG_READ(RTC_ENTRY_ADDR_REG);
if (!esp_ptr_executable(stub_ptr)) {
return NULL;
}
return stub_ptr;
}
void esp_set_deep_sleep_wake_stub(esp_deep_sleep_wake_stub_fn_t new_stub)