Support code rewriting for AArch64 Linux guests - #1141
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Sangho Lee (sangho2) merged 1 commit intoAug 7, 2026
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Redirects every `SVC` and `TPIDR_EL0` access through compact self-describing slots (64 bytes for `SVC`, 48 for `MSR`, 16 for `MRS`) carrying typed metadata in their final word, so a signal handler can recognize one by template alone. `SVC` gating is guest-neutral, but `TPIDR_EL0` is the Linux guest ABI's thread pointer, so this covers ELF guests only. Per-site outbound stubs preserve `x16` on syscall return, and guest thread-pointer offsets are patched in only after strict slot validation. x86-64 rewriting is unchanged. Adds the crate to the AArch64 CI job.
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🤖 SemverChecks 🤖 No breaking API changes detected Note: this does not mean API is unchanged, or even that there are no breaking changes; simply, none of the detections triggered. |
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This PR adds support for code rewriting for AArch64 Linux guests. It redirects all
SVCinstructions andTPIDR_EL0accesses through compact gates/slots. TheSVCgate is mostly guest-neutral, but theTPIDR_EL0gates are Linux guest specific. A virtualized guestTPIDR_EL0offsets relative to a host anchor register (i.e.,TPIDR_EL0,X18, andTPIDRRO_EL0in Linux, Windows, and macOS, respectively).