Add support for AArch64 to the Linux userland platform - #1156
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Sangho Lee (sangho2) wants to merge 1 commit into
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Add support for AArch64 to the Linux userland platform#1156Sangho Lee (sangho2) wants to merge 1 commit into
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Sangho Lee (sangho2)
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Implements the guest/host transition against the rewriter's gate ABI, keeping `TPIDR_EL0` as the host TLS anchor. Interrupts, exceptions and `rt_sigreturn` resumes synthesize a kernel-compatible frame so all 31 GPRs, `PC` and sanitized `PSTATE` are restored atomically, and a signal taken inside a gate is canonicalized to valid guest state rather than exposing host scratch values. Also adds AArch64 signal handling and seccomp, and the crate to the AArch64 CI job. Running a guest additionally needs the shim. FP/SIMD preservation is out of scope.
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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 AArch64 to the Linux userland platform. It ports most stuffs that the x64 Linux userland platform provides to AArch64, while enabling anchor-based guest/host TLS transition. To support
rt_sigreturn, it synthesizes and uses a kernel-compatibleResumeFrame.