linux-musl-s390x: Add __psw_t/fprefset_t/*context_t #4726
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Gelbpunkt
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Sep 26, 2025
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| pub struct fpregset_t { | ||
| pub fpc: u32, | ||
| __pad: u32, |
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I don't see this padding in musl sources?
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It isn't explicit, but the compiler ends up adding it anyway. Many other structs in libc are defined with explicit padding. I don't know the official policy (either way it should ideally be enforced in CI)
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removed for now.
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As far as I can tell, padding fields are only used when they are also defined in the libc headers
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https://elixir.bootlin.com/musl/v1.2.5/source/arch/s390x/bits/signal.h (backport <rust-lang#4726>) (cherry picked from commit c7702ef)
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https://elixir.bootlin.com/musl/v1.2.5/source/arch/s390x/bits/signal.h (backport <rust-lang#4726>) (cherry picked from commit c7702ef)
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https://elixir.bootlin.com/musl/v1.2.5/source/arch/s390x/bits/signal.h (backport <#4726>) (cherry picked from commit c7702ef)
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Description
Define signal-related structs according to musl-libc. These structs are already mentioned in libc-test/semver/linux-s390x.txt, so it makes sense to define the for musl, not just for glibc.
Sources
https://elixir.bootlin.com/musl/v1.2.5/source/arch/s390x/bits/signal.h
Checklist
Relevant tests inno changelibc-test/semverhave been updated*LASTor*MAXareincluded (see #3131)
cd libc-test && cargo test --target mytarget);especially relevant for platforms that may not be checked in CI