On 05/24/2011 02:06 PM, Ludovic Brenta wrote: > Reto Buerki wrote: >> On 05/24/2011 11:00 AM, Pascal Obry wrote: >>> ... but as you found out some work as been done to remove most cases >>> where a stack must be executable. >> >> Yes. But as it seems this work has not (yet) been merged into FSF gcc. >> >> I'm looking into FSF gcc trunk right now to find out if the following >> work found in the GNAT GPL 2010 compiler (file: src/gcc-43.dif) has been >> merged: >> >> 2008-05-25 Eric Botcazou <[email protected]> >> Elimination of stack trampolines >> ...[snip]... >> >> Part of this huge patch introduces the -fno-trampolines compiler option: >> >> "-fno-trampolines is enabled by default to let the compiler avoid >> generating them if it computes that this is safe, on a case by case >> basis, and replace them with descriptors. Descriptors are always made >> up of data only, but the generated code must be prepared to deal with >> them." >> >> This option does not exist in gcc (Debian 4.4.5-8) 4.4.5: >> gnat1: error: unrecognized command line option "-fno-trampolines" >> >> It works (as expected) with GNAT GPL 2010. If you specify -ftrampolines, >> the stack is set executable as well. >> >> @xavier: Can you test if such an option exists in gcc 4.6.0? > > I don't see this patch in > http://gcc.gnu.org/ml/gcc-patches/2008-05/authors.html or in the ChangeLog > in the FSF tree. The option -fno-trampolines does not appear in the index > of the GNAT User's Guide for GCC 4.6.0. Therefore it seems like someone at > AdaCore decided not to (or forgot to) merge this patch into the FSF tree :( > > I'll try to find out whether any other patches are missing. This might > take me several days though. If anyone wants to help with this search, > could you compare the gcc/ada/ChangeLog-2008 of GNAT GPL 2010 with that of > GCC 4.6.0 and send me the diff? Same for all other gcc/ada/ChangeLog-* > files, for that matter.
I can't find the file gcc/ada/ChangeLog-2008 in neither GNAT GPL 2010 sources nor binary distribution tarballs. Am I missing something? -- To UNSUBSCRIBE, email to [email protected] with a subject of "unsubscribe". Trouble? Contact [email protected] Archive: http://lists.debian.org/[email protected]
