mirror of
https://github.com/RGBCube/serenity
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27 lines
842 B
Diff
27 lines
842 B
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Brian Gianforcaro <b.gianfo@gmail.com>
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Date: Tue, 21 Dec 2021 23:48:46 -0800
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Subject: [PATCH] Disable rdtsc support for serenity
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This patch disables the function which uses `rdtsc` to get the current
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clock time, as that instruction isn't allowed to be called from user
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space by serenity.
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If you did attempt to call it you would trip a segfault.
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---
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arch/arch-x86.h | 3 ++-
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1 file changed, 2 insertions(+), 1 deletion(-)
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diff --git a/arch/arch-x86.h b/arch/arch-x86.h
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index c6bcb54..c1005b1 100644
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--- a/arch/arch-x86.h
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+++ b/arch/arch-x86.h
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@@ -35,6 +35,7 @@ static inline unsigned long long get_cpu_clock(void)
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}
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#define ARCH_HAVE_FFZ
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-#define ARCH_HAVE_CPU_CLOCK
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+// Serenity OS doesn't allow you to read rdtsc.
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+// #define ARCH_HAVE_CPU_CLOCK
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#endif
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