On Mon, Oct 6, 2014 at 7:06 AM, Ard Biesheuvel <ard.biesheuvel@xxxxxxxxxx> wrote: > This reverts commit 84be880560fb, which itself reverted my original > attempt to move x86 from #include'ing .c files from across the tree > to using the EFI stub built as a static library. > > The issue that affected the original approach was that splitting > the implementation into several .o files resulted in the variable > 'efi_early' becoming a global with external linkage, which under > -fPIC implies that references to it must go through the GOT. However, > dealing with this additional GOT entry turned out to be troublesome > on some EFI implementations. (GCC's visibility=hidden attribute is > supposed to lift this requirement, but it turned out not to work on > the 32-bit build.) > > Instead, use a pure getter function to get a reference to efi_early. > This approach results in no additional GOT entries being generated, > so there is no need for any changes in the early GOT handling. > > Cc: Maarten Lankhorst <maarten.lankhorst@xxxxxxxxxxxxx> > Cc: Josh Boyer <jwboyer@xxxxxxxxxxxxxxxxx> > Cc: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx> > Signed-off-by: Ard Biesheuvel <ard.biesheuvel@xxxxxxxxxx> > --- > > Gents, > > This is a request for testing: I would like to find out if this patch > fixes Maarten's issue without breaking anything like it did for Josh > and Linus the first time around. I probably won't get to testing this today, but I will try tomorrow. josh -- To unsubscribe from this list: send the line "unsubscribe linux-efi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
