16 lines
		
	
	
	
		
			173 B
		
	
	
	
		
			ArmAsm
		
	
	
	
	
	
			
		
		
	
	
			16 lines
		
	
	
	
		
			173 B
		
	
	
	
		
			ArmAsm
		
	
	
	
	
	
#include "sys.h"
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.define	_lock
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.extern	_errno
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_lock:
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	mov	2(sp),0f+2
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	sys	indir; .data2 0f
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	bcc	1f
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	mov	r0,_errno
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	mov	$-1,r0
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1:
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	rts	pc
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.sect .data
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0:
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	sys	lock
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	.data2	0
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