LLVM Embedded Toolchains Working Group call this Thursday, Feb 1st

Community
1

Dear all,

This is a kind reminder about the upcoming LLVM Embedded Toolchains Working Group sync up call this week.

Draft agenda:

  1. Any code reviews to highlight.
  2. Semihosting in LLVM libc.
  3. LLVM libc hardening modes, related: latest memory safety discussions and possible mitigations in C and C++, especially for embedded devices where there are no many alternative languages.
  4. ASAN for embedded devices further direction.
  5. ROM patching.
  6. elf2bin New tool 'llvm-elf2bin'. (NOT READY FOR REVIEW – NO TESTS) by statham-arm · Pull Request #73625 · llvm/llvm-project · GitHub further direction.
  7. Any other updates on the LLVM Dev meeting workshop topics: LLD, linker scripts and LTO, code coverage and profiling, …
  8. Save the date for EuroLLVM 2024 in Vienna, Austria in April - who is going?

Please suggestion additional topics below. Dial in details and meeting minutes are maintained under LLVM Embedded Toolchains Working Group sync up.

2

I’m hoping to make it but may be a few minutes late. I’ve started prototyping a new “noxip” attribute that hopes to make LTO for embedded “safer” for systems with execute-in-place (xip) memory. The attribute will 1) be maintained through inlining 2) propagate to all resources needed by the functions and 3) end up in a new .noxip.text input section for placement in a non-xip output section. My working branch is here: GitHub - tannewt/llvm-project at noxip (Only parsing and attaching to llvm ir is working so far but I have the workflow going.)

I’d love feedback on the approach and guidance on how to make it upstreamable.

1 Like