Found the problem. It's nothing to do with _FORTIFY_SOURCE, and those intructions indexing off r2 are to do with -fstack-check so no problem there either.
Fixed as follows. Incidentally this bug was triggered by fixing the obvious bug in no_global_regs_above Index: gcc/config/rs6000/rs6000.c =================================================================== --- gcc/config/rs6000/rs6000.c (revision 152105) +++ gcc/config/rs6000/rs6000.c (working copy) @@ -16148,7 +16148,7 @@ rs6000_emit_prologue (void) int using_store_multiple; int using_static_chain_p = (cfun->static_chain_decl != NULL_TREE && df_regs_ever_live_p (STATIC_CHAIN_REGNUM) - && !call_used_regs[STATIC_CHAIN_REGNUM]); + && call_used_regs[STATIC_CHAIN_REGNUM]); HOST_WIDE_INT sp_offset = 0; if (TARGET_FIX_AND_CONTINUE) -- mountall fails, broken (powerpc?) gcc? https://bugs.launchpad.net/bugs/432222 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs