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How to force string (rodata.str) alignment with ARM 6.6.3

42Bastian Schick

Hi

is there a way to force constant strings to be aligned on 4 byte boundary?

For example: createTask("Taskname");

I tried the linker option "OVERALIGN", but it just generates a warning.

Cheers

Parents
  • 0 in reply to Ronan Synnott

    Yes this works for me as well. This is actually my workaround:

    /* Workaround */
void func()
{
  char name[12]; /* automatic aligned to 4 bytes as it is on stack*/
  
  strcpy(name, "process");
  create(name);
}

void func2()
{
  create("process"); /* constant string might be placed on any boundary */
}

    func2() would show the original code.

    create() (assembly function) would read the name 32bit wise. This works fine on architecture > Armv6-M, but not for Armv6-M.

    The workaround is ok and I can live with it, but it is a pity there is no way to force alignment.

Reply
  • 0 in reply to Ronan Synnott

    Yes this works for me as well. This is actually my workaround:

    /* Workaround */
void func()
{
  char name[12]; /* automatic aligned to 4 bytes as it is on stack*/
  
  strcpy(name, "process");
  create(name);
}

void func2()
{
  create("process"); /* constant string might be placed on any boundary */
}

    func2() would show the original code.

    create() (assembly function) would read the name 32bit wise. This works fine on architecture > Armv6-M, but not for Armv6-M.

    The workaround is ok and I can live with it, but it is a pity there is no way to force alignment.

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