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52 lines
840 B
ArmAsm
52 lines
840 B
ArmAsm
;
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; Ullrich von Bassewitz, 2003-06-02
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;
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; int __fastcall__ vprintf (const char* format, va_list ap);
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;
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.export _vprintf
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.import _vfprintf, _stdout
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.import decsp2
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.importzp sp
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.proc _vprintf
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; Save A which contains the low part of ap
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pha
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; Allocate one more word on the stack
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jsr decsp2
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; Move the format parameter down and store stdout in it's place
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ldy #2
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lda (sp),y
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ldy #0
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sta (sp),y
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ldy #3
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lda (sp),y
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ldy #1
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sta (sp),y
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iny
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lda _stdout
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sta (sp),y
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iny
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lda _stdout+1
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sta (sp),y
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; Restore A
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pla
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; Call vfprintf (stdout, format, ap) which will cleanup the stack and return
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jmp _vfprintf
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.endproc
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