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freebsd
GitHub Repository: freebsd/freebsd-src
 Path: blob/main/sys/amd64/sgx/sgx_support.S
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/*-

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 * Copyright (c) 2017 Ruslan Bukin <[email protected]>

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 * All rights reserved.

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 *

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 * This software was developed by BAE Systems, the University of Cambridge

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 * Computer Laboratory, and Memorial University under DARPA/AFRL contract

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 * FA8650-15-C-7558 ("CADETS"), as part of the DARPA Transparent Computing

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 * (TC) research program.

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 *

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 * Redistribution and use in source and binary forms, with or without

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 * modification, are permitted provided that the following conditions

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 * are met:

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 * 1. Redistributions of source code must retain the above copyright

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 *    notice, this list of conditions and the following disclaimer.

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 * 2. Redistributions in binary form must reproduce the above copyright

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 *    notice, this list of conditions and the following disclaimer in the

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 *    documentation and/or other materials provided with the distribution.

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 *

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 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND

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 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

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 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE

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 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE

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 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL

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 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS

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 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)

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 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT

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 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY

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 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF

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 * SUCH DAMAGE.

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 */

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#include <machine/asmacros.h>

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#include <amd64/sgx/sgxvar.h>

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#include "assym.inc"

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	.text

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/*

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 * int

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 * sgx_encls(uint32_t eax, uint64_t rbx, uint64_t rcx, uint64_t rdx);

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 *           %edi,         %rsi,         %rdx,         %rcx

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 */

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ENTRY(sgx_encls)

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	PUSH_FRAME_POINTER

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	pushq	%rbx

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	movq	PCPU(CURPCB),%r8

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	movl	%edi,%eax

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	movq	%rsi,%rbx

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	xchgq	%rdx,%rcx

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	movq	$sgx_onfault,PCB_ONFAULT(%r8)

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	.byte 0x0f, 0x01, 0xcf

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	movq	$0,PCB_ONFAULT(%r8)

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	popq	%rbx

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	POP_FRAME_POINTER

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	ret

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END(sgx_encls)

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/*

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 * SGX operations fault handler

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 */

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	ALIGN_TEXT

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sgx_onfault:

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	movq	$0,PCB_ONFAULT(%r8)

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	movl	$SGX_EFAULT,%eax

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	popq	%rbx

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	POP_FRAME_POINTER

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	ret

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