tree 4575ee4c4861d5bf1d4570b068c9069aebd3cdfd
parent d0b4a61a07bb99734695f79dc5c766e9866a1fe3
author Fangrui Song <maskray@google.com> 1567414190 +0000
committer Fangrui Song <maskray@google.com> 1567414190 +0000

[ELF] Align SHT_LLVM_PART_EHDR to a maximum page size boundary

Fixes https://bugs.chromium.org/p/chromium/issues/detail?id=998712

SHT_LLVM_PART_EHDR marks the start of a partition. The partition
sections will be extracted to a separate file. Align to the next maximum
page size boundary so that we can find the ELF header at the start. We
cannot benefit from overlapping p_offset ranges with the previous
segment anyway.

It seems we lack some llvm-objcopy --extract-main-partition and
--extract-partition sanity checks. It may place EHDR at the start
even if p_offset if non zero. Anyway, the lld change is justified for
the reasons above.

Reviewed By: ruiu

Differential Revision: https://reviews.llvm.org/D67032

git-svn-id: https://llvm.org/svn/llvm-project/lld/trunk@370629 91177308-0d34-0410-b5e6-96231b3b80d8