On Tuesday 03 March 2009 17:56:25 David Daney wrote: >[ ... ] > When (and if) we move the sigreturn trampoline to a vdso we should be > able to maintain the ABI. it's more a matter of “when” rather than “if”. there is still an intention here to use XI (we have SmartMIPS), which requires not using the signal (or FP) trampoline on the stack. moving the signal trampoline to a vdso (which is(? was?) called, maybe misleadingly, ‘vsyscall’, on other architectures) is the obvious solution to that part of the puzzle. and yes, it is possible to maintain the ABI; the signal trampoline is still also put on the stack, and modulo XI, would work if used — the trampoline-on-stack is simply not used if there is a vdso with the signal trampoline. cheers! -blf- -- “How many surrealists does it take to | Brian Foster change a lightbulb? Three. One calms | somewhere in south of France the warthog, and two fill the bathtub | Stop E$$o (ExxonMobil)! with brightly-coloured machine tools.” | http://www.stopesso.com
