Warning from linker about alignment of `.text` section

[jonathanpallant]

I'm writing a simple Rust program for STM32U5A5, using the stm32-rs PAC.

It seems I have 0x218 bytes worth of interrupt vectors (134 vectors).

This puts .text at 0xc000258, which the linker warns me is not a multiple of 16

warning: linker stderr: rust-lld: address (0xc000258) of section .text is not a multiple of alignment (16)
  |
  = note: `#[warn(linker_messages)]` on by default

Should link.x apply some alignment to the start of the .text section?

[jonathanpallant]

If you get this, you can force _stext to be somewhere else by adding something like this to your memory.x file:

PROVIDE(_stext = 0x0C000260);

[adamgreig]

Huh, I wonder if we've just usually had alignment due to vector table length or if we've just never noticed because of linker warnings usually being hidden in the past. As far as I know it doesn't need to be aligned for cortex-m CPUs, they just read it directly after the interrupts, so I don't know why LLD's complaining.