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Only the function that actually is needed will be linked. It is very useful for targets that do not have file-system I/O.
28 lines
716 B
ArmAsm
28 lines
716 B
ArmAsm
;
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; 2003-08-12, Ullrich von Bassewitz
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; 2015-09-24, Greg King
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;
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; Helper function for several high-level file functions.
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;
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.include "errno.inc"
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.macpack cpu
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; ----------------------------------------------------------------------------
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; int __fastcall__ _directerrno (unsigned char code);
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; /* Set errno to a specific error code, clear _oserror, and return -1. Used
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; ** by the library.
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; */
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__directerrno:
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jsr __seterrno ; Set errno (returns with .A = 0)
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sta __oserror ; Clear __oserror
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.if (.cpu .bitand CPU_ISET_65SC02)
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dec a
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.else
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lda #$FF ; Return -1
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.endif
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tax
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rts
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