From 67df197b1a07944c2e0e40ded3d4fd07d108e110 Mon Sep 17 00:00:00 2001 From: Arjan van de Ven Date: Fri, 6 Jan 2006 00:12:04 -0800 Subject: [PATCH] x86/x86_64: mark rodata section read-only: x86-64 support x86-64 specific parts to make the .rodata section read only Signed-off-by: Arjan van de Ven Signed-off-by: Ingo Molnar Cc: Andi Kleen Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- arch/x86_64/Kconfig.debug | 10 ++++++++++ 1 file changed, 10 insertions(+) (limited to 'arch/x86_64/Kconfig.debug') diff --git a/arch/x86_64/Kconfig.debug b/arch/x86_64/Kconfig.debug index e2c6e64a85ec..fcb06a50fdd2 100644 --- a/arch/x86_64/Kconfig.debug +++ b/arch/x86_64/Kconfig.debug @@ -9,6 +9,16 @@ config INIT_DEBUG Fill __init and __initdata at the end of boot. This helps debugging illegal uses of __init and __initdata after initialization. +config DEBUG_RODATA + bool "Write protect kernel read-only data structures" + depends on DEBUG_KERNEL + help + Mark the kernel read-only data as write-protected in the pagetables, + in order to catch accidental (and incorrect) writes to such const data. + This option may have a slight performance impact because a portion + of the kernel code won't be covered by a 2MB TLB anymore. + If in doubt, say "N". + config IOMMU_DEBUG depends on GART_IOMMU && DEBUG_KERNEL bool "Enable IOMMU debugging" -- cgit v1.2.2