rust-embedded / rust-embedded/cortex-m
Warning from linker about alignment of `.text` section
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Description
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)
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= note: `#[warn(linker_messages)]` on by default
Should link.x apply some alignment to the start of the .text section?
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Research direction
Start by inspecting link.x and how rust-lld places the .text section after the interrupt vectors for the STM32U5A5 case. Reproduce the warning with the reported 0x218-byte vector table, then verify that the resulting .text address satisfies the required 16-byte alignment and that the linker warning is gone.
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Assessment
- Tech stack
- rust
- Domain
- build-system, embedded-iot
- Issue type
- Bug
- Difficulty
- 3/5
- Estimated time
- 1-2 days
- Activity status
- Quiet
- Clarity
- Mostly clear
- Newbie friendliness
- 48/100