linux: update ptrace_syscall_info struct

[Marcondiro]

Hi,

Description

linux: update ptrace_syscall_info struct:

• Add new flags field and reserveds.

The updated version has a different size on 32 bits arches (84 -> 88 bytes) while the size stays the same on 64 bits.

Sources

ptrace.h
kernel lore

Checklist

• Relevant tests in libc-test/semver have been updated
• No placeholder or unstable values like *LAST or *MAX are
  included (see #3131)
• Tested locally (cd libc-test && cargo test --target mytarget);
  especially relevant for platforms that may not be checked in CI

@rustbot label +stable-nominated

[tgross35]

Could you split the rval rename from the rest? I'd actually be okay to backport the flags and reserved portion since we don't guarantee anything about padding/reserved fields. Just not the renaming since that's an actual break.

@rustbot author

[rustbot]

Reminder, once the PR becomes ready for a review, use @rustbot ready.

[rustbot]

This PR was rebased onto a different main commit. Here's a range-diff highlighting what actually changed.

Rebasing is a normal part of keeping PRs up to date, so no action is needed—this note is just to help reviewers.

[Marcondiro]

Sure, I've just opened #5016 for the renaming, thanks

@rustbot ready