Jlinkx64sys -

The SEGGER J-Link debug probe is widely used for ARM and RISC-V embedded systems, but its high-speed JTAG/SWD capabilities remain underexplored for debugging and tracing code on x64 platforms. This paper presents JLinkX64Sys, a framework that repurposes J-Link hardware to enable low-level system call tracing, kernel module debugging, and user-space application instrumentation on x86-64 architectures. We implement a custom transport layer that maps x64 debugging interfaces (e.g., Intel PT, DBGBUS) to J-Link’s serial wire protocol, achieving non-intrusive execution capture at microsecond resolution. Evaluation on Linux kernel 6.x and Windows 11 x64 shows that JLinkX64Sys outperforms software-only tracers (e.g., strace, WinDbg in software mode) by 3.2× in trace throughput while adding less than 1.5% runtime overhead. The framework enables cross-platform debugging workflows where embedded engineers can reuse existing J-Link hardware for desktop/server system analysis.

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One of the concerns users might have when encountering unfamiliar system files is whether they are safe or could potentially be harmful. In its legitimate form, jlinkx64.sys is a safe file that is part of the official SEGGER J-Link software package. However, like any system file, it's crucial to ensure that the file has not been tampered with or replaced by a malicious version. The SEGGER J-Link debug probe is widely used