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author | Ard Biesheuvel <ard.biesheuvel@linaro.org> | 2015-10-08 22:02:04 +0300 |
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committer | Catalin Marinas <catalin.marinas@arm.com> | 2015-10-12 18:20:12 +0300 |
commit | e8f3010f7326c00368dbc057bd052bec80dfc072 (patch) | |
tree | 111ad1d750410588ecd346fc257c05565963f0fd /arch/arm64/include/asm/cmpxchg.h | |
parent | 207918461eb0aca720fddec5da79bc71c133b9f1 (diff) | |
download | linux-e8f3010f7326c00368dbc057bd052bec80dfc072.tar.xz |
arm64/efi: isolate EFI stub from the kernel proper
Since arm64 does not use a builtin decompressor, the EFI stub is built
into the kernel proper. So far, this has been working fine, but actually,
since the stub is in fact a PE/COFF relocatable binary that is executed
at an unknown offset in the 1:1 mapping provided by the UEFI firmware, we
should not be seamlessly sharing code with the kernel proper, which is a
position dependent executable linked at a high virtual offset.
So instead, separate the contents of libstub and its dependencies, by
putting them into their own namespace by prefixing all of its symbols
with __efistub. This way, we have tight control over what parts of the
kernel proper are referenced by the stub.
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Reviewed-by: Matt Fleming <matt.fleming@intel.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Diffstat (limited to 'arch/arm64/include/asm/cmpxchg.h')
0 files changed, 0 insertions, 0 deletions