Re: [PATCH v4 05/12] elf: Allow arch to tweak initial mmap prot flags
From: Catalin Marinas <catalin.marinas@arm.com>
Date: 2020-01-14 16:39:06
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On Wed, Dec 11, 2019 at 03:41:59PM +0000, Mark Brown wrote:
From: Dave Martin <Dave.Martin@arm.com> An arch may want to tweak the mmap prot flags for an ELFexecutable's initial mappings. For example, arm64 is going to need to add PROT_BTI for executable pages in an ELF process whose executable is marked as using Branch Target Identification (an ARMv8.5-A control flow integrity feature). So that this can be done in a generic way, add a hook arch_elf_adjust_prot() to modify the prot flags as desired: arches can select CONFIG_HAVE_ELF_PROT and implement their own backend where necessary. By default, leave the prot flags unchanged. Signed-off-by: Dave Martin <Dave.Martin@arm.com> Reviewed-by: Kees Cook <redacted> Signed-off-by: Mark Brown <broonie@kernel.org>
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com> _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel