commit | b9f34e3a65782a9f33fe9eaf2240ec4f1f6e3f6e | [log] [tgz] |
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author | Tom Stellard <tstellar@redhat.com> | Wed Oct 31 17:14:17 2018 +0000 |
committer | Tom Stellard <tstellar@redhat.com> | Wed Oct 31 17:14:17 2018 +0000 |
tree | 86a9f12e073bf610283641d1ecbbc8dc1aaa03c8 | |
parent | 22d86791526b83733a51b107c70e68a54fbd3370 [diff] |
Merging r345002: ------------------------------------------------------------------------ r345002 | dim | 2018-10-22 22:53:15 -0700 (Mon, 22 Oct 2018) | 41 lines Don't mess up RelIplt symbols during relocatable processing Summary: During upgrading of the FreeBSD source tree with lld 7.0.0, I noticed that it started complaining about `crt1.o` having an "index past the end of the symbol table". Such a symbol table looks approximately like this, viewed with `readelf -s` (note the `Ndx` field being messed up): ``` Symbol table '.symtab' contains 4 entries: Num: Value Size Type Bind Vis Ndx Name 0: 00000000 0 NOTYPE LOCAL DEFAULT UND 1: 00000000 0 SECTION LOCAL DEFAULT 1 2: 00000000 0 NOTYPE WEAK HIDDEN RSV[0xffff] __rel_iplt_end 3: 00000000 0 NOTYPE WEAK HIDDEN RSV[0xffff] __rel_iplt_start ``` At first, it seemed that recent ifunc relocation work had caused this: <https://reviews.freebsd.org/rS339351>, but it turned out that it was due to incorrect processing of the object files by lld, when using `-r` (a.k.a. --relocatable). Bisecting showed that rL324421 ("Convert a use of Config->Static") was the commit where this new behavior began. Simply reverting it solved the issue, and the `__rel_iplt` symbols had an index of `UND` again. Looking at Rafael's commit message, I think he simply missed the possibility of `--relocatable` being in effect, so I have added an additional check for it. I also added a simple regression test case. Reviewers: grimar, ruiu, emaste, espindola Reviewed By: ruiu Subscribers: arichardson, krytarowski, llvm-commits Differential Revision: https://reviews.llvm.org/D53515 ------------------------------------------------------------------------ git-svn-id: https://llvm.org/svn/llvm-project/lld/branches/release_70@345739 91177308-0d34-0410-b5e6-96231b3b80d8
This directory and its subdirectories contain source code for the LLVM Linker, a modular cross platform linker which is built as part of the LLVM compiler infrastructure project.
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In order to make sure various developers can evaluate patches over the same tests, we create a collection of self contained programs.
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