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83 lines
1.3 KiB
ArmAsm
83 lines
1.3 KiB
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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.destructor doatexit, 5
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.import __errno
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.import jmpvec
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.include "errno.inc"
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; ---------------------------------------------------------------------------
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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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; ---------------------------------------------------------------------------
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.code
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.proc doatexit
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ldy exitfunc_index ; Get index
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beq @L9 ; Jump if done
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dey
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lda exitfunc_table,y
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sta jmpvec+2
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dey
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lda exitfunc_table,y
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sta jmpvec+1
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sty exitfunc_index
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jsr jmpvec ; Call the function
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jmp doatexit ; Next one
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@L9: rts
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.endproc
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; ---------------------------------------------------------------------------
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.bss
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exitfunc_index: .res 1 ; Index into table, inc'ed by 2
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exitfunc_table: .res 10 ; 5 exit functions
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exitfunc_max = <(* - exitfunc_table)
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