sgx_support.S

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    1 /*-
    2  * Copyright (c) 2017 Ruslan Bukin <br@bsdpad.com>
    3  * All rights reserved.
    4  *
    5  * This software was developed by BAE Systems, the University of Cambridge
    6  * Computer Laboratory, and Memorial University under DARPA/AFRL contract
    7  * FA8650-15-C-7558 ("CADETS"), as part of the DARPA Transparent Computing
    8  * (TC) research program.
    9  *
   10  * Redistribution and use in source and binary forms, with or without
   11  * modification, are permitted provided that the following conditions
   12  * are met:
   13  * 1. Redistributions of source code must retain the above copyright
   14  *    notice, this list of conditions and the following disclaimer.
   15  * 2. Redistributions in binary form must reproduce the above copyright
   16  *    notice, this list of conditions and the following disclaimer in the
   17  *    documentation and/or other materials provided with the distribution.
   18  *
   19  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   29  * SUCH DAMAGE.
   30  *
   31  * $FreeBSD$
   32  */
   33 
   34 #include <machine/asmacros.h>
   35 #include <amd64/sgx/sgxvar.h>
   36 
   37 #include "assym.inc"
   38 
   39         .text
   40 
   41 /*
   42  * int
   43  * sgx_encls(uint32_t eax, uint64_t rbx, uint64_t rcx, uint64_t rdx);
   44  *           %edi,         %rsi,         %rdx,         %rcx
   45  */
   46 ENTRY(sgx_encls)
   47         PUSH_FRAME_POINTER
   48         pushq   %rbx
   49         movq    PCPU(CURPCB),%r8
   50         movl    %edi,%eax
   51         movq    %rsi,%rbx
   52         xchgq   %rdx,%rcx
   53         movq    $sgx_onfault,PCB_ONFAULT(%r8)
   54         .byte 0x0f, 0x01, 0xcf
   55         movq    $0,PCB_ONFAULT(%r8)
   56         popq    %rbx
   57         POP_FRAME_POINTER
   58         ret
   59 END(sgx_encls)
   60 
   61 /*
   62  * SGX operations fault handler
   63  */
   64         ALIGN_TEXT
   65 sgx_onfault:
   66         movq    $0,PCB_ONFAULT(%r8)
   67         movl    $SGX_EFAULT,%eax
   68         popq    %rbx
   69         POP_FRAME_POINTER
   70         ret

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sys/amd64/sgx/sgx_support.S