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Vincenzo Frascino
a7f71a2c89
Provide the arm64 compat (AArch32) vDSO in kernel/vdso32 in a similar way to what happens in kernel/vdso. The compat vDSO leverages on an adaptation of the arm architecture code with few changes: - Use of lib/vdso for gettimeofday - Implement a syscall based fallback - Introduce clock_getres() for the compat library - Implement trampolines - Implement elf note To build the compat vDSO a 32 bit compiler is required and needs to be specified via CONFIG_CROSS_COMPILE_COMPAT_VDSO. The code is not yet enabled as other prerequisites are missing. Signed-off-by: Vincenzo Frascino <[email protected]> Signed-off-by: Thomas Gleixner <[email protected]> Tested-by: Shijith Thotton <[email protected]> Tested-by: Andre Przywara <[email protected]> Cc: [email protected] Cc: [email protected] Cc: [email protected] Cc: [email protected] Cc: Catalin Marinas <[email protected]> Cc: Will Deacon <[email protected]> Cc: Arnd Bergmann <[email protected]> Cc: Russell King <[email protected]> Cc: Ralf Baechle <[email protected]> Cc: Paul Burton <[email protected]> Cc: Daniel Lezcano <[email protected]> Cc: Mark Salyzyn <[email protected]> Cc: Peter Collingbourne <[email protected]> Cc: Shuah Khan <[email protected]> Cc: Dmitry Safonov <[email protected]> Cc: Rasmus Villemoes <[email protected]> Cc: Huw Davies <[email protected]> Link: https://lkml.kernel.org/r/[email protected]
16 lines
387 B
C
16 lines
387 B
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright (C) 2012-2018 ARM Limited
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*
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* This supplies .note.* sections to go into the PT_NOTE inside the vDSO text.
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* Here we can supply some information useful to userland.
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*/
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#include <linux/uts.h>
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#include <linux/version.h>
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#include <linux/elfnote.h>
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#include <linux/build-salt.h>
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ELFNOTE32("Linux", 0, LINUX_VERSION_CODE);
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BUILD_SALT;
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