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CONFIG_LEGACY_VSYSCALL_XONLY: Emulate execution only

General informations

The Linux kernel configuration item CONFIG_LEGACY_VSYSCALL_XONLY:

Help text

The kernel traps and emulates calls into the fixed vsyscall address mapping and does not allow reads. This configuration is recommended when userspace might use the legacy vsyscall area but support for legacy binary instrumentation of legacy code is not needed. It mitigates certain uses of the vsyscall area as an ASLR-bypassing buffer.

Hardware

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