On Thu, 2008-07-03 at 19:19 -0700, Roland McGrath wrote: > Why not just use ELF_HWCAP for this? It looks like powerpc only has 3 bits > left there (keeping it to 32), but 3 is not 0. If not that, why not use > dsocaps? That is, some magic in the vDSO, which glibc already supports on > all machines where it uses the vDSO. (For how it works, see the use in > arch/x86/vdso/vdso32/note.S for CONFIG_XEN.)
Well, we use strings to represent the platforms already (ie, the actual CPU microarchitecture). Fitting those into bits would be annoying, it makes sense to have AT_BASE_PLATFORM to be the "base" variant of AT_PLATFORM. _However_ there is a bug in that this patch adds an entry without bumping the number of entries in the cached array (ie. AT_VECTOR_SIZE_BASE needs to be updated). Ben. _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@ozlabs.org https://ozlabs.org/mailman/listinfo/linuxppc-dev
