On Sunday 07 April 2013 09:55:14 Kyle McMartin wrote: > On Sun, Apr 07, 2013 at 12:00:50PM +0200, Michael Kerrisk (man-pages) wrote: > > [Adding a few people to CC who may be able to help with Mike's doubts > > on PA-RISC; folks, if any of you could have a quick look at the parisc > > piece below, that would be helpful] > > The syscall number is in %r20, everything else looks correct. The > returned value is in %r28 and the args are %r26 through %r21. just to be clear, the only insn you need is: ble 0x100(%sr2, %r0); the kernel docs say sr2 holds the kernel gateway page (so i guess 0x100 is a known offset into that). the docs don't mention r0 that i can see, so i'm guessing it's one of those "always 0" registers ? the sysdep code has an ldi call in the branch delay slot (i think), but all that seems to do is load r20 with the syscall nr. -mike
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