mirror of
https://git.code.sf.net/p/quake/quakeforge-old
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7df744f9e9
came from as soon as I actually finish doing it since it has to be done by hand to preserve Copyright notices and file descriptions.
107 lines
2 KiB
ArmAsm
107 lines
2 KiB
ArmAsm
/*
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dosasm.s
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(description)
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Copyright (C) 1996-1997 Id Software, Inc.
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Copyright (C) 1999,2000 contributors of the QuakeForge project
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Please see the file "AUTHORS" for a list of contributors
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 2
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of the License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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See the GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to:
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Free Software Foundation, Inc.
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59 Temple Place - Suite 330
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Boston, MA 02111-1307, USA
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$Id$
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*/
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#include <asm_i386.h>
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.data
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fpenv: .long 0, 0, 0, 0, 0, 0, 0, 0
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.text
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.globl C(StartMSRInterval)
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C(StartMSRInterval):
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movl $0x11,%ecx // read the CESR
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.byte 0x0F
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.byte 0x32 // RDMSR
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andl $0xFE3FFE3F,%eax // stop both counters
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.byte 0x0F
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.byte 0x30 // WRMSR
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movl 4(%esp),%eax // point counter 0 to desired event, with counters
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andl $0x3F,%eax // still stopped
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movl $0x11,%ecx
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.byte 0x0F
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.byte 0x30 // WRMSR
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movl $0x12,%ecx // set counter 0 to the value 0
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subl %eax,%eax
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subl %edx,%edx
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.byte 0x0F
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.byte 0x30 // WRMSR
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movl 4(%esp),%eax // restart counter 0 with selected event
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andl $0x3F,%eax
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subl %edx,%edx
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orl $0xC0,%eax
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movl $0x11,%ecx // control and event select
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.byte 0x0F
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.byte 0x30 // WRMSR
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ret
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.globl C(EndMSRInterval)
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C(EndMSRInterval):
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movl $0x12,%ecx // counter 0
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.byte 0x0F
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.byte 0x32 // RDMSR
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ret // lower 32 bits of count in %eax
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#if 0
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.data
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Lxxx: .long 0
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.text
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.globl C(setstackcheck)
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C(setstackcheck):
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movl %esp,%eax
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subl $0x38000,%eax
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movl $0x5A5A5A5A,(%eax)
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movl %eax,Lxxx
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ret
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.globl C(dostackcheck)
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C(dostackcheck):
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movl Lxxx,%edx
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movl $0,%eax
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cmpl $0x5A5A5A5A,(%edx)
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jz qqq
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incl %eax
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qqq:
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ret
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#endif
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