To comment on the following update, log in, then open the issue: http://www.openoffice.org/issues/show_bug.cgi?id=108371 Issue #|108371 Summary|cppu: preserve 128-bit stack alignment on x86 in cpp_u |no/gcc3_linux_intel Component|udk Version|OOo 3.1.1 Platform|PC URL|http://bugs.gentoo.org/show_bug.cgi?id=292519 OS/Version|Linux Status|UNCONFIRMED Status whiteboard| Keywords| Resolution| Issue type|PATCH Priority|P3 Subcomponent|code Assigned to|kr Reported by|ecatmur
------- Additional comments from [email protected] Sat Jan 16 00:20:34 +0000 2010 ------- The gcc3 linux-intel-x86 ABI expects stack frames to be aligned to 128-bit (16-byte) boundaries. This is to allow optimised code to use SSE and SSE2 instructions with 128-bit operands, which segfault when used on (stack) memory operands violating 128-bit alignment. This is seen at http://bugs.gentoo.org/show_bug.cgi?id=292519 as a segfault during installation, when executing build/ooo310-m19/solver/310/unxlngi6.pro/bin/regcomp. The optimised code where the segfault occurs is in python internals, in PyString_Format. The issue is that the asm within cpp_uno/gcc3_linux_intel does not preserve 128-bit stack alignment. gcc3 assumes 128-bit alignment and emits code that preserves that alignment, but requires that asm also act to preserve alignment. I attach a patch to preserve alignment in cpp_uno/gcc3_linux_intel. --------------------------------------------------------------------- Please do not reply to this automatically generated notification from Issue Tracker. Please log onto the website and enter your comments. http://qa.openoffice.org/issue_handling/project_issues.html#notification --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected] --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
