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c4c7fb2174
Add the BTI instructions and the associated note to make the AArch64 asm objects compatible with BTI enforcement. Signed-off-by: Ard Biesheuvel <ardb@kernel.org> Reviewed-by: Leif Lindholm <quic_llindhol@quicinc.com> Reviewed-by: Oliver Smith-Denny <osd@smith-denny.com>
35 lines
704 B
ArmAsm
35 lines
704 B
ArmAsm
##------------------------------------------------------------------------------
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#
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# SpeculationBarrier() for AArch64
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#
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# Copyright (c) 2019, Linaro Ltd. All rights reserved.
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#
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# SPDX-License-Identifier: BSD-2-Clause-Patent
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#
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##------------------------------------------------------------------------------
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.text
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.p2align 2
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GCC_ASM_EXPORT(SpeculationBarrier)
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#/**
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# Uses as a barrier to stop speculative execution.
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#
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# Ensures that no later instruction will execute speculatively, until all prior
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# instructions have completed.
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#
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#**/
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#VOID
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#EFIAPI
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#SpeculationBarrier (
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# VOID
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# );
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#
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ASM_PFX(SpeculationBarrier):
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AARCH64_BTI(c)
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dsb sy
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isb
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ret
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