diff options
author | Ard Biesheuvel <ard.biesheuvel@linaro.org> | 2014-11-05 17:00:56 +0100 |
---|---|---|
committer | Matt Fleming <matt.fleming@intel.com> | 2014-11-11 22:23:11 +0000 |
commit | 243b6754cd17112bbf0724ed3c13446b48cf6a28 (patch) | |
tree | d105e79e798f37fabc49ae2996534af800c77379 /arch/x86/mm/dump_pagetables.c | |
parent | af5a29aee4d1e5b5fbfbaf45cb097f9c6257c7b8 (diff) | |
download | linux-243b6754cd17112bbf0724ed3c13446b48cf6a28.tar.bz2 |
efi/x86: Move x86 back to libstub
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.
Tested-by: Maarten Lankhorst <maarten.lankhorst@canonical.com>
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Matt Fleming <matt.fleming@intel.com>
Diffstat (limited to 'arch/x86/mm/dump_pagetables.c')
0 files changed, 0 insertions, 0 deletions