tree be25758e1dd9152feea8a044ef42c20622b303a7
parent da0ce607bf6773b868aecc7cd1de0a6ad6cab7df
author Peter Smith <peter.smith@linaro.org> 1543490287 +0000
committer Peter Smith <peter.smith@linaro.org> 1543490287 +0000

[LLD][ELF] Error if _GLOBAL_OFFSET_TABLE_ is defined in input objects

The _GLOBAL_OFFSET_TABLE_ is a linker defined symbol that is placed at
some location relative to the .got, .got.plt or .toc section. On some
targets such as Arm the correctness of some code sequences using a
relocation to _GLOBAL_OFFSET_TABLE_ depend on the value of the symbol
being in the linker defined place. Follow the ld.gold example and give
a multiple symbol definition error. The ld.bfd behaviour is to ignore the
definition in the input object and redefine it, which seems like it could
be more surprising.

fixes pr39587

Differential Revision: https://reviews.llvm.org/D54624


git-svn-id: https://llvm.org/svn/llvm-project/lld/trunk@347854 91177308-0d34-0410-b5e6-96231b3b80d8