| commit | 33b16539b0dde9420351e3bbcdd4c85875cf6832 | [log] [tgz] |
|---|---|---|
| author | Fangrui Song <maskray@google.com> | Mon Aug 05 14:31:39 2019 +0000 |
| committer | Fangrui Song <maskray@google.com> | Mon Aug 05 14:31:39 2019 +0000 |
| tree | 5faa708af79ca6df62f5db622a1196fc9059760c | |
| parent | 963d97af3c727d4c40881462dbb4094bf588e5af [diff] |
[ELF] Consistently prioritize non-* wildcards overs "*" in version scripts
We prioritize non-* wildcards overs VER_NDX_LOCAL/VER_NDX_GLOBAL "*".
This patch generalizes the rule to "*" of other versions and thus fixes PR40176.
I don't feel strongly about this GNU linkers' behavior but the
generalization simplifies code.
Delete `config->defaultSymbolVersion` which was used to special case
VER_NDX_LOCAL/VER_NDX_GLOBAL "*".
In `SymbolTable::scanVersionScript`, custom versions are handled the same
way as VER_NDX_LOCAL/VER_NDX_GLOBAL. So merge
`config->versionScript{Locals,Globals}` into `config->versionDefinitions`.
Overall this seems to simplify the code.
In `SymbolTable::assign{Exact,Wildcard}Versions`,
`sym->verdefIndex == config->defaultSymbolVersion` is changed to
`verdefIndex == UINT32_C(-1)`.
This allows us to give duplicate assignment diagnostics for
`{ global: foo; };` `V1 { global: foo; };`
In test/linkerscript/version-script.s:
vs_index of an undefined symbol changes from 0 to 1. This doesn't matter (arguably 1 is better because the binding is STB_GLOBAL) because vs_index of an undefined symbol is ignored.
Reviewed By: ruiu
Differential Revision: https://reviews.llvm.org/D65716
git-svn-id: https://llvm.org/svn/llvm-project/lld/trunk@367869 91177308-0d34-0410-b5e6-96231b3b80d8
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