Roland McGrath wrote: > Does the old userland compatibility you're concerned about really need the > vdso to be at 0xfffffe000 in particular, or just need it to be at a fixed > address that matches the phdrs inside the image? My recollection of the old > glibc's limitation was that it expected the image's phdrs to match its load > address. The xen kernels used to change this to 0xffffd000 or something, > and AFAIK that was fine. If that's all that's needed, it is not so hard to > adjust the vDSO contents at boot time (phdrs, shdrs, and symbols; no code > contents use the absolute address). Under CONFIG_COMPAT_VDSO, it can see > where the paravirt moved the fixmap to, and apply adjustments. >
Jan Beulich just posted a patch to do just this - relocate the vdso's ELF header. If that's all that's really required to keep COMPAT_VDSO viable under PARAVIRT, then it seems like the way to go. J - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/