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     void *data;
     //size_t alloc;
     //MP_PLAT_ALLOC_EXEC(len, &data, &alloc);
     data = malloc(len);
     read_bytes(reader, data, len);

     void *iram_data = heap_caps_realloc(data,len,MALLOC_CAP_EXEC);
     free(data);
     char* entry = iram_data+28;
     printf("func start %p from %p,content is ",entry,iram_data);
     for(int i =0;i<10;i++)
    {
        printf("%02x ",*(entry+i));
    }

Code: Select all

			//copy exe from DRAM to IRAM with 32 bit alignment
			//exe should be padded to 4 byte alignment, first 4 bytes are offset to entry point, second 4 bytes are size to malloc for result
			uint32_t* dest = (uint32_t*)heap_caps_malloc(((ram_bin_end - ram_bin_start) + 3) & 0xFFFFFFFC, MALLOC_CAP_EXEC);
			if (!dest) {
				ESP_LOGE(TAG, "unable to malloc exec dest!");
				break;
			}
			for (uint16_t i = 0; i < ram_bin_end - ram_bin_start; i += 4){
				dest[i>>2] = ram_bin_start[i] + (ram_bin_start[i + 1] << 8) + (ram_bin_start[i + 2] << 16) + (ram_bin_start[i + 3] << 24);
			}
			
			//first 32 bits are offset to entry point
			uint32_t func = (uint32_t)dest + dest[0];
			
			//second 32 bits are the size of the result
			//this function is responsible for malloc/free of result_start
			uint32_t result_size = dest[1];
			if (result_size){
				result_start = (uint8_t*)malloc(result_size);
				if (!result_start){
					ESP_LOGE(TAG, "failed to malloc for result");
					break;
				}	
			}

			uint32_t result = ((uint32_t(*)(uint8_t*, uint8_t*, uint8_t*, uint8_t*, uint8_t*))func)(data0_start, data0_end, data1_start, data1_end, result_start);