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Roland McGrath wrote: > It's not clear to me why x86-64 should put the global > pointer-guard value in tcbhead_t, given that's it's only used in libc.so > and so a local symbol there could be used. Because it is so easy to access the value it is a weakness. The TCB address is not at a constant relative address to the libc code and therefore accessing the value is much harder. -- â Ulrich Drepper â Red Hat, Inc. â 444 Castro St â Mountain View, CA â
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