ESP-WROVER-KIT V4.1 Custom bootloader hooks read memory

[satsok_n]

I am using the ESP-WROVER-KIT V4.1. I am running the bootloader_hooks example. I am trying to read SRAM within the 'bootloader_before_init' function.

Code: Untitled.c Select all

void bootloader_before_init(void) {

    /* Keep in my mind that a lot of functions cannot be called from here

     * as system initialization has not been performed yet, including

     * BSS, SPI flash, or memory protection. */



	char *p = (char *)0x400A0000;

	char first_byte = p[0];

	

    ESP_LOGI("HOOK", "This hook is called BEFORE bootloader initialization");

}

Is there any way of reading memory at that point?