2000-02-18 03:39:52 +08:00
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/* This is file CLOCK.S */
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/*
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2001-02-23 06:12:43 +08:00
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** Copyright (C) 1993 DJ Delorie
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2000-02-18 03:39:52 +08:00
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**
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** This file is distributed under the terms listed in the document
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2001-02-23 06:12:43 +08:00
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** "copying.dj".
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2000-02-18 03:39:52 +08:00
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** A copy of "copying.dj" should accompany this file; if not, a copy
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** should be available from where this file was obtained. This file
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** may not be distributed without a verbatim copy of "copying.dj".
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**
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** This file is distributed WITHOUT ANY WARRANTY; without even the implied
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** warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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**
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** Modified by C. Sandmann for DPMI support (sandmann@clio.rice.edu)
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*/
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.data
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clock_init:
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.long 0
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.text
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.globl _clock
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_clock:
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call _rawclock
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imull $54931,%eax,%eax
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ret
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.align 4,0x90
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.globl _rawclock
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_rawclock:
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movzwl __core_select,%eax
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testl %eax,%eax
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je old_clock /* Image run with pre-DPMI extender */
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movw %ax,%gs
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movl %gs:0x46c(,1),%eax
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jmp check_initted
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old_clock:
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movl 0xe000046c,%eax
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check_initted:
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cmp $0,clock_init
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jne clock_initted
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movl %eax,clock_init
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clock_initted:
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subl clock_init,%eax
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ret
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