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Merge pull request #197 from ThePrez/aix64
Copy ppc64 linux implementation to ppc64 AIX
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/* | ||
* this is the internal transfer function. | ||
* | ||
* HISTORY | ||
* 16-Oct-20 Jesse Gorzinski <jgorzins@us.ibm.com> | ||
* Copied from Linux PPC64 implementation | ||
* 04-Sep-18 Alexey Borzenkov <snaury@gmail.com> | ||
* Workaround a gcc bug using manual save/restore of r30 | ||
* 21-Mar-18 Tulio Magno Quites Machado Filho <tuliom@linux.vnet.ibm.com> | ||
* Added r30 to the list of saved registers in order to fully comply with | ||
* both ppc64 ELFv1 ABI and the ppc64le ELFv2 ABI, that classify this | ||
* register as a nonvolatile register used for local variables. | ||
* 21-Mar-18 Laszlo Boszormenyi <gcs@debian.org> | ||
* Save r2 (TOC pointer) manually. | ||
* 10-Dec-13 Ulrich Weigand <uweigand@de.ibm.com> | ||
* Support ELFv2 ABI. Save float/vector registers. | ||
* 09-Mar-12 Michael Ellerman <michael@ellerman.id.au> | ||
* 64-bit implementation, copied from 32-bit. | ||
* 07-Sep-05 (py-dev mailing list discussion) | ||
* removed 'r31' from the register-saved. !!!! WARNING !!!! | ||
* It means that this file can no longer be compiled statically! | ||
* It is now only suitable as part of a dynamic library! | ||
* 14-Jan-04 Bob Ippolito <bob@redivi.com> | ||
* added cr2-cr4 to the registers to be saved. | ||
* Open questions: Should we save FP registers? | ||
* What about vector registers? | ||
* Differences between darwin and unix? | ||
* 24-Nov-02 Christian Tismer <tismer@tismer.com> | ||
* needed to add another magic constant to insure | ||
* that f in slp_eval_frame(PyFrameObject *f) | ||
* STACK_REFPLUS will probably be 1 in most cases. | ||
* gets included into the saved stack area. | ||
* 04-Oct-02 Gustavo Niemeyer <niemeyer@conectiva.com> | ||
* Ported from MacOS version. | ||
* 17-Sep-02 Christian Tismer <tismer@tismer.com> | ||
* after virtualizing stack save/restore, the | ||
* stack size shrunk a bit. Needed to introduce | ||
* an adjustment STACK_MAGIC per platform. | ||
* 15-Sep-02 Gerd Woetzel <gerd.woetzel@GMD.DE> | ||
* slightly changed framework for sparc | ||
* 29-Jun-02 Christian Tismer <tismer@tismer.com> | ||
* Added register 13-29, 31 saves. The same way as | ||
* Armin Rigo did for the x86_unix version. | ||
* This seems to be now fully functional! | ||
* 04-Mar-02 Hye-Shik Chang <perky@fallin.lv> | ||
* Ported from i386. | ||
* 31-Jul-12 Trevor Bowen <trevorbowen@gmail.com> | ||
* Changed memory constraints to register only. | ||
*/ | ||
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#define STACK_REFPLUS 1 | ||
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#ifdef SLP_EVAL | ||
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#define STACK_MAGIC 6 | ||
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#if defined(__ALTIVEC__) | ||
#define ALTIVEC_REGS \ | ||
"v20", "v21", "v22", "v23", "v24", "v25", "v26", "v27", \ | ||
"v28", "v29", "v30", "v31", | ||
#else | ||
#define ALTIVEC_REGS | ||
#endif | ||
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#define REGS_TO_SAVE "r14", "r15", "r16", "r17", "r18", "r19", "r20", \ | ||
"r21", "r22", "r23", "r24", "r25", "r26", "r27", "r28", "r29", \ | ||
"r31", \ | ||
"fr14", "fr15", "fr16", "fr17", "fr18", "fr19", "fr20", "fr21", \ | ||
"fr22", "fr23", "fr24", "fr25", "fr26", "fr27", "fr28", "fr29", \ | ||
"fr30", "fr31", \ | ||
ALTIVEC_REGS \ | ||
"cr2", "cr3", "cr4" | ||
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static int | ||
slp_switch(void) | ||
{ | ||
register int err; | ||
register long *stackref, stsizediff; | ||
void * toc; | ||
void * r30; | ||
__asm__ volatile ("" : : : REGS_TO_SAVE); | ||
__asm__ volatile ("std 2, %0" : "=m" (toc)); | ||
__asm__ volatile ("std 30, %0" : "=m" (r30)); | ||
__asm__ ("mr %0, 1" : "=r" (stackref) : ); | ||
{ | ||
SLP_SAVE_STATE(stackref, stsizediff); | ||
__asm__ volatile ( | ||
"mr 11, %0\n" | ||
"add 1, 1, 11\n" | ||
: /* no outputs */ | ||
: "r" (stsizediff) | ||
: "11" | ||
); | ||
SLP_RESTORE_STATE(); | ||
} | ||
__asm__ volatile ("ld 30, %0" : : "m" (r30)); | ||
__asm__ volatile ("ld 2, %0" : : "m" (toc)); | ||
__asm__ volatile ("" : : : REGS_TO_SAVE); | ||
__asm__ volatile ("li %0, 0" : "=r" (err)); | ||
return err; | ||
} | ||
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#endif |
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