diff --git a/src/sys/init/start.S b/src/sys/init/start.S new file mode 100644 index 0000000..99f4f28 --- /dev/null +++ b/src/sys/init/start.S @@ -0,0 +1,66 @@ +/***************************************************************************************** + Copyright (c) 2002-2004 The UbixOS Project + All rights reserved. + + Redistribution and use in source and binary forms, with or without modification, are + permitted provided that the following conditions are met: + + Redistributions of source code must retain the above copyright notice, this list of + conditions, the following disclaimer and the list of authors. Redistributions in binary + form must reproduce the above copyright notice, this list of conditions, the following + disclaimer and the list of authors in the documentation and/or other materials provided + with the distribution. Neither the name of the UbixOS Project nor the names of its + contributors may be used to endorse or promote products derived from this software + without specific prior written permission. + + THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY + EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL + THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR + TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS + SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + + $Id$ + +*****************************************************************************************/ + +.globl _start +.text +.code32 +_start: + mov $ubixGDT,%edx + lgdtl (loadGDT) + mov $0x10,%eax + mov %eax,%ds + mov %eax,%es + mov %eax,%fs + mov %eax,%gs + mov %eax,%ss + mov $kernelStack,%eax + addl $0x2000,%eax + mov %eax,%esp + mov %eax,%ebp + mov $0x18,%ax + lldt %ax + mov $0x20,%ax + ltr %ax + ljmp $0x08,$next + hlt +next: + call main + +.data +kernelStack: +.align 0x2000 +.type kernelStack,@object +.size kernelStack,0x2000 + + +/*** + $Log$ + END + ***/ +