25 lines
803 B
C
25 lines
803 B
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef __ASM_COMPILER_H
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#define __ASM_COMPILER_H
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#if defined(CONFIG_ARM64_PTR_AUTH)
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/*
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* The EL0/EL1 pointer bits used by a pointer authentication code.
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* This is dependent on TBI0/TBI1 being enabled, or bits 63:56 would also apply.
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*/
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#define ptrauth_user_pac_mask() GENMASK_ULL(54, vabits_actual)
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#define ptrauth_kernel_pac_mask() GENMASK_ULL(63, vabits_actual)
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/* Valid for EL0 TTBR0 and EL1 TTBR1 instruction pointers */
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#define ptrauth_clear_pac(ptr) \
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((ptr & BIT_ULL(55)) ? (ptr | ptrauth_kernel_pac_mask()) : \
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(ptr & ~ptrauth_user_pac_mask()))
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#define __builtin_return_address(val) \
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(void *)(ptrauth_clear_pac((unsigned long)__builtin_return_address(val)))
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#endif /* CONFIG_ARM64_PTR_AUTH */
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#endif /* __ASM_COMPILER_H */
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