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- #ifndef __CALLBACK_H__
- #define __CALLBACK_H__
-
- /* This is a workaround for a bug in the current version of gcc:
-
- gcc assumes that no one will touch %a4 after it is set up in crt0.o.
- This isn't true if a function is called as a callback by something
- that wasn't compiled by gcc (like FrmCloseAllForms()). It may also
- not be true if it is used as a callback by something in a different
- shared library.
-
- We really want a function attribute "callback" which will insert this
- progloue and epilogoue automatically.
-
- - Ian */
-
- register void *reg_a4 asm("%a4");
-
- #define CALLBACK_PROLOGUE \
- void *save_a4 = reg_a4; asm("move.l %%a5,%%a4; sub.l #edata,%%a4" : :);
-
- #define CALLBACK_EPILOGUE reg_a4 = save_a4;
-
- #endif
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