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Languages & runtimes · #aarch64
Learn how ARM64's Memory Tagging Extension (MTE) turns hardware tags into immediate exceptions for out‑of‑bounds accesses, and how to enable and verify it in Linux.
Step‑by‑step guide to diagnose ARM64 Pointer Authentication faults: check SCTLR_EL1, read PAC keys, inspect ESR/FAR, verify with a test program, and apply the appropriate fix.
A diagnostic guide for resolving ARMv8.5 Memory Tagging Extension (MTE) tag-check faults on AArch64, covering ESR analysis, pointer tag loss, and silicon errata.
Learn how to implement ARM64 Memory Tagging Extension (MTE) to detect buffer overflows and use-after-free errors using hardware-level tag validation.
Learn how ARMv8.3‑A Pointer Authentication (PAC) signs pointers to stop return‑oriented programming attacks, how to enable it with compiler flags, and how to verify support on your hardware.
A diagnostic guide for resolving ARM64 Memory Tagging Extension (MTE) faults, covering hardware verification, kernel configuration, and compiler alignment requirements.
Determine the practical limit on distinct tags usable for MTE Determine the practical limit on distinct tags usable for MTE when deploying memory safety checks on aarch64 Linux, considering the 4‑bit tag field and any reserved values. The architecture defines 4 bits, giving 16 possible values; tag 0 is conventionally used to indicate untagged memory, leaving
MMU ↔ PAN Integration In AArch64, the MMU enforces address‑space separation via page tables, while the Privileged Access Never (PAN) bit in the PSTATE_EL1 register aims to block kernel accidental reads of user‑space memory. PAN is only present on ARMv8.1‑A and newer cores, and its effectiveness depends on correct configuration of the PXN bits in each page ta
The goal is to explain intermittent latency that appears only when multiple request handlers run concurrently on ARMv8-A aarch64 cores. The suspected component is the LDXR/STXR exclusive-load/store path, where the per-core exclusive monitor can fail repeatedly under contention and force retry loops. Uncertainty centers on whether the delay comes from exclusi