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3630e82ab6
In preparation for adding arm64 GCS support make the map_shadow_stack() SHADOW_STACK_SET_TOKEN flag generic and add _SET_MARKER. The existing flag indicates that a token usable for stack switch should be added to the top of the newly mapped GCS region while the new flag indicates that a top of stack marker suitable for use by unwinders should be added above that. For arm64 the top of stack marker is all bits 0. Reviewed-by: Thiago Jung Bauermann <thiago.bauermann@linaro.org> Reviewed-by: Catalin Marinas <catalin.marinas@arm.com> Acked-by: Yury Khrustalev <yury.khrustalev@arm.com> Signed-off-by: Mark Brown <broonie@kernel.org> Link: https://lore.kernel.org/r/20241001-arm64-gcs-v13-5-222b78d87eee@kernel.org Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
10 lines
284 B
C
10 lines
284 B
C
/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
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#ifndef _ASM_X86_MMAN_H
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#define _ASM_X86_MMAN_H
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#define MAP_32BIT 0x40 /* only give out 32bit addresses */
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#define MAP_ABOVE4G 0x80 /* only map above 4GB */
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#include <asm-generic/mman.h>
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#endif /* _ASM_X86_MMAN_H */
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