------- Comment #5 from jakub at gcc dot gnu dot org 2005-12-01 14:38 ------- Finding a bug in 1M of assembly is really hard without knowing where exactly to look at. Nevertheless, I suspect: movl 237(%edi), %esi in _ZN14X11SalGraphics10SetXORModeEh (whereas -mpentiumpro .s has movb 237(%esi), %al ). I haven't verified in detail, but it looks possible the 32bit bitfield (out of which only 14 bits are occupied) might be the last thing in the class, so if the bitfield happened to end up at END_OF_PAGE-240 bytes and nothing was mapped in the next page, a crash could happen.
-- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25199
