How to force 32 bits address space

[jquside]

Hello all,

I'm storing and address in a uint32_t variable. It's cross compiling so this is fine but when executing the unit test these access crashes because the address is not completely captures becaus is using more than 32 bits for addresses.

This is a dirty code of a code to check this issue:

void test_read32_should_Return_Code_SUCCESS(void) {
    printf("%s\n", __func__);

    QRNG_device *dev;
    uint32_t buffer[1];
    uint32_t bufffer_read[2] = {0x12345678, 0xABCDEF01};
    
    printf("&bufffer_read[0]: 0x%08X\n", &bufffer_read[0]);
    printf("&bufffer_read[0]: %p\n", bufffer_read);
    printf("&buffer[1][0]:    %p\n", &buffer[1]);

    const readParams params = {
        .addr = (uint32_t)&bufffer_read[0],
        .buffer = (uint32_t *)buffer,
        .nBytes = sizeof(buffer),
        .cptMode = false,
        .interruptMode = false,
    };

    int result = 0; //read32(dev, &params);
    printf("%i\n", result);

    TEST_ASSERT_EQUAL_INT(SUCCESS, result);
    // TEST_ASSERT_EQUAL_UINT32(0x12345678, params.buffer[0]); 
}

and this is the output for the print statements:

-----------
TEST OUTPUT
-----------
[test/test_AXI.c]
  - "test_read32_should_Return_Code_SUCCESS"
  - "&bufffer_read[0]: 0xB9C28730"
  - "&bufffer_read[0]: 0x7ffeb9c28730"
  - "&buffer[1][0]:    0x7ffeb9c28730"
  - "0"

I have to comment the read32 call to be able to see the prints output because otherwise it crashes.

My question, There is a way to force test compilation to 32 bits?

I tride -m32 flag but its not working.

I'm on arch linux with ceedling 1.0.1, ruby 3.4.3 and gcc 15.1.1

Thank you very much

[Letme]

m32 forces 32bit pointers (https://gcc.gnu.org/onlinedocs/gcc/x86-Options.html), so I am not sure what is not working?

Maybe you should focus on that - otherwise focus on what read32 is doing wrong...