CONFIG_VSYSCALL: Support vsyscall page

General informations

The Linux kernel configuration item CONFIG_VSYSCALL:

• prompt: Support vsyscall page
• type: bool
• depends on: CONFIG_MMU && ( CONFIG_CPU_SH3 || CONFIG_CPU_SH4 )
• defined in arch/sh/mm/Kconfig
• found in Linux kernels: 2.6.19–2.6.39, 3.0–3.19, 4.0–4.20, 5.0–5.19, 6.0–6.12

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

LKDDb

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Sources

This page is automaticly generated with free (libre, open) software lkddb(see lkddb-sources).

The data is retrived from:

• Linux kernel
• Linux Kernel Driver DataBase (LKDDb)

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