------- Comment #1 from ubizjak at gmail dot com 2008-04-29 13:15 ------- Since there are many workarounds for this problem I think that this problem should be fixed elsewhere by either (a) fixing the kernel or (b) fixing the application that is affected by the problem
a) A two-liner patch to the kernel. This is the approach that major distribution have taken. b) The fix is to add explicit cld at the beginning of the function that can be called from exception handler and uses string operations. Due to the nature of the problem, it is very unlikely that this problem will hit real word applications. OTOH, cld instruction has non-negligible performance impact. Adding -mcld to compile flags in order to emit cld at the beginning of every function that uses stringops will introduce certain performance hit. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36079
