OVMS3-idf/components/heap/test/test_diram.c
Angus Gratton 32756b165e bootloader: Add fault injection resistance to Secure Boot bootloader verification
Goal is that multiple faults would be required to bypass a boot-time signature check.

- Also strengthens some address range checks for safe app memory addresses
- Change pre-enable logic to also check the bootloader signature before enabling SBV2 on ESP32

Add some additional checks for invalid sections:

- Sections only partially in DRAM or IRAM are invalid
- If a section is in D/IRAM, allow the possibility only some is in D/IRAM
- Only pass sections that are entirely in the same type of RTC memory region
2020-03-06 01:16:04 +05:30

74 lines
2 KiB
C

/*
Tests for D/IRAM support in heap capability allocator
*/
#include <esp_types.h>
#include <stdio.h>
#include "unity.h"
#include "esp_heap_caps.h"
#include "soc/soc_memory_layout.h"
#define ALLOC_SZ 1024
static void *malloc_block_diram(uint32_t caps)
{
void *attempts[256] = { 0 }; // Allocate up to 256 ALLOC_SZ blocks to exhaust all non-D/IRAM memory temporarily
int count = 0;
void *result;
while(count < sizeof(attempts)/sizeof(void *)) {
result = heap_caps_malloc(ALLOC_SZ, caps);
TEST_ASSERT_NOT_NULL_MESSAGE(result, "not enough free heap to perform test");
if (esp_ptr_in_diram_dram(result) || esp_ptr_in_diram_iram(result)) {
break;
}
attempts[count] = result;
result = NULL;
count++;
}
for (int i = 0; i < count; i++) {
free(attempts[i]);
}
TEST_ASSERT_NOT_NULL_MESSAGE(result, "not enough D/IRAM memory is free");
return result;
}
TEST_CASE("Allocate D/IRAM as DRAM", "[heap]")
{
uint32_t *dram = malloc_block_diram(MALLOC_CAP_8BIT | MALLOC_CAP_INTERNAL);
for (int i = 0; i < ALLOC_SZ / sizeof(uint32_t); i++) {
uint32_t v = i + 0xAAAA;
dram[i] = v;
volatile uint32_t *iram = esp_ptr_diram_dram_to_iram(dram + i);
TEST_ASSERT_EQUAL(v, dram[i]);
TEST_ASSERT_EQUAL(v, *iram);
*iram = UINT32_MAX;
TEST_ASSERT_EQUAL(UINT32_MAX, *iram);
TEST_ASSERT_EQUAL(UINT32_MAX, dram[i]);
}
free(dram);
}
TEST_CASE("Allocate D/IRAM as IRAM", "[heap]")
{
uint32_t *iram = malloc_block_diram(MALLOC_CAP_EXEC);
for (int i = 0; i < ALLOC_SZ / sizeof(uint32_t); i++) {
uint32_t v = i + 0xEEE;
iram[i] = v;
volatile uint32_t *dram = esp_ptr_diram_iram_to_dram(iram + i);
TEST_ASSERT_EQUAL_HEX32(v, iram[i]);
TEST_ASSERT_EQUAL_HEX32(v, *dram);
*dram = UINT32_MAX;
TEST_ASSERT_EQUAL_HEX32(UINT32_MAX, *dram);
TEST_ASSERT_EQUAL_HEX32(UINT32_MAX, iram[i]);
}
free(iram);
}