[libc-commits] [libc] [libc][arm] implement a basic setjmp/longjmp (PR #93220)

[Nick Desaulniers via libc-commits]

nickdesaulniers wrote:

@petrhosek mentioned to me offline the need to support `--target=armv6m-unknown-eabi` which the current implementation does not.  Let me update my implementation to add support for ARM or THUMB(1).

https://github.com/llvm/llvm-project/pull/93220