Messages in this thread | | | Subject | Re: Mach-O binary format support and Darwin syscall personality [Was: uts banner changes] | From | Benjamin Herrenschmidt <> | Date | Wed, 13 Dec 2006 09:38:59 +1100 |
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On Tue, 2006-12-12 at 17:34 -0500, Kyle Moffett wrote: > On Dec 12, 2006, at 13:20:19, Linus Torvalds wrote: > > That said, powerpc simply doesn't historically do any system call > > translation, so you'll just have to implement the same kind of > > translation layer that sparc has done, for example. > > Thanks a lot for all your help. I've got two last questions: From > the code in entry_32.s I can dig up "current" from ((struct > paca_struct *)r13)->__current to read a personality flag from it, > right? Digging up offsets in assembly can't be very fun :-\
That's what asm-offset.c is for :-) It generates all the offsets you need. In general though, you probably want to copy your personality flag to thread_info, along with other bits in there (like 32 vs. 64 bits). Look how it's done on ppc64.
> Secondly, is there a preferred existing field into which I should > stick said flag or just stuff it somewhere?
Yes, thread_info->flags.
> Ok, I figured it was going to be ugly; maybe not quite _that_ ugly > but my hopes weren't high enough for you to dash to any real degree :-D.
Well... it can't be pretty :-)
Ben.
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