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CONFIG_VSYSCALL: Support vsyscall page

General informations

The Linux kernel configuration item CONFIG_VSYSCALL:

Help text

This will enable support for the kernel mapping a vDSO page in process space, and subsequently handing down the entry point to the libc through the ELF auxiliary vector.

From the kernel side this is used for the signal trampoline. For systems with an MMU that can afford to give up a page, (the default value) say Y.

Hardware

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