bioscall.s

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    1 /*-
    2  * Copyright (c) 1997 Jonathan Lemon
    3  * All rights reserved.
    4  *
    5  * Redistribution and use in source and binary forms, with or without
    6  * modification, are permitted provided that the following conditions
    7  * are met:
    8  * 1. Redistributions of source code must retain the above copyright
    9  *    notice, this list of conditions and the following disclaimer.
   10  * 2. Redistributions in binary form must reproduce the above copyright
   11  *    notice, this list of conditions and the following disclaimer in the
   12  *    documentation and/or other materials provided with the distribution.
   13  *
   14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   24  * SUCH DAMAGE.
   25  *
   26  * $FreeBSD$
   27  */
   28 
   29 /*
   30  * Functions for calling x86 BIOS functions from the BSD kernel
   31  */
   32         
   33 #include <machine/asmacros.h>
   34 
   35         .text
   36 /*
   37  * bios32(caddr_t func_addr, bios32_args *args)
   38  */
   39 
   40 ENTRY(bios32)
   41         pushl   %ebx
   42         pushl   %esi
   43         movl    (2*4+2*4)(%esp), %esi
   44         movl    0(%esi), %eax
   45         movl    4(%esi), %ebx
   46         movl    8(%esi), %ecx
   47         movl    12(%esi), %edx
   48         movl    (2*4+1*4)(%esp), %esi
   49         mov     %cs, %di
   50         pushl   %edi                            /* really lcall/lret */
   51         call    %esi
   52         movl    (2*4+2*4)(%esp), %esi
   53         movl    %eax, 0(%esi)
   54         movl    %ebx, 4(%esi)
   55         movl    %ecx, 8(%esi)
   56         movl    %edx, 12(%esi)
   57         popl    %esi
   58         popl    %ebx
   59         ret

Cache object: fc44816d00d1fe2bbfccad0b027d8356

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FreeBSD/Linux Kernel Cross Reference sys/i386/i386/bioscall.s

FreeBSD/Linux Kernel Cross Reference
sys/i386/i386/bioscall.s