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51 lines
683 B
ArmAsm
51 lines
683 B
ArmAsm
;
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; Ullrich von Bassewitz, 06.06.1998
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;
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; int atexit (void (*f) (void));
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;
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.export _atexit
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.import exitfunc_table, exitfunc_index
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.importzp exitfunc_max
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.import __errno
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.include "errno.inc"
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.proc _atexit
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ldy exitfunc_index
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cpy #exitfunc_max ; Slot available?
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beq @Error ; Jump if no
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; Enter the function into the table
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sta exitfunc_table,y
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iny
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txa
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sta exitfunc_table,y
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iny
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sty exitfunc_index
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; Done, return zero
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lda #0
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tax
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rts
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; Error, no space left
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@Error: lda #ENOSPC ; No space left
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sta __errno
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ldx #$00
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stx __errno+1
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dex ; Make return value -1
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txa
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rts
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.endproc
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