83 lines
2.6 KiB
C
83 lines
2.6 KiB
C
/*
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* this is the internal transfer function.
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*
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* HISTORY
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* 07-Sep-05 (py-dev mailing list discussion)
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* removed 'r31' from the register-saved. !!!! WARNING !!!!
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* It means that this file can no longer be compiled statically!
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* It is now only suitable as part of a dynamic library!
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* 14-Jan-04 Bob Ippolito <bob@redivi.com>
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* added cr2-cr4 to the registers to be saved.
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* Open questions: Should we save FP registers?
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* What about vector registers?
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* Differences between darwin and unix?
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* 24-Nov-02 Christian Tismer <tismer@tismer.com>
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* needed to add another magic constant to insure
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* that f in slp_eval_frame(PyFrameObject *f)
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* STACK_REFPLUS will probably be 1 in most cases.
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* gets included into the saved stack area.
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* 04-Oct-02 Gustavo Niemeyer <niemeyer@conectiva.com>
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* Ported from MacOS version.
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* 17-Sep-02 Christian Tismer <tismer@tismer.com>
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* after virtualizing stack save/restore, the
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* stack size shrunk a bit. Needed to introduce
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* an adjustment STACK_MAGIC per platform.
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* 15-Sep-02 Gerd Woetzel <gerd.woetzel@GMD.DE>
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* slightly changed framework for sparc
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* 29-Jun-02 Christian Tismer <tismer@tismer.com>
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* Added register 13-29, 31 saves. The same way as
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* Armin Rigo did for the x86_unix version.
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* This seems to be now fully functional!
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* 04-Mar-02 Hye-Shik Chang <perky@fallin.lv>
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* Ported from i386.
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*/
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#define STACK_REFPLUS 1
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#ifdef SLP_EVAL
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#define STACK_MAGIC 3
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/* !!!!WARNING!!!! need to add "r31" in the next line if this header file
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* is meant to be compiled non-dynamically!
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*/
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#define REGS_TO_SAVE "r13", "r14", "r15", "r16", "r17", "r18", "r19", "r20", \
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"r21", "r22", "r23", "r24", "r25", "r26", "r27", "r28", "r29", \
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"cr2", "cr3", "cr4"
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static int
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slp_switch(void)
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{
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register int err;
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register int *stackref, stsizediff;
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__asm__ volatile ("" : : : REGS_TO_SAVE);
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__asm__ ("mr %0, 1" : "=g" (stackref) : );
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{
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SLP_SAVE_STATE(stackref, stsizediff);
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__asm__ volatile (
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"mr 11, %0\n"
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"add 1, 1, 11\n"
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"add 30, 30, 11\n"
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: /* no outputs */
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: "g" (stsizediff)
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: "11"
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);
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SLP_RESTORE_STATE();
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}
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__asm__ volatile ("" : : : REGS_TO_SAVE);
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__asm__ volatile ("li %0, 0" : "=r" (err));
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return err;
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}
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#endif
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/*
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* further self-processing support
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*/
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/*
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* if you want to add self-inspection tools, place them
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* here. See the x86_msvc for the necessary defines.
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* These features are highly experimental und not
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* essential yet.
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*/
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