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Define __tls_get_addr as a hidden symbol even for ARM or MIPS. 

addIgnored defines a given symbol even if there is no existing
symbol with the same name. So, even if libc provides __tls_get_addr,
we should still be able to call addIgnored.

Differential Revision: https://reviews.llvm.org/D32053

llvm-svn: 301290
This commit is contained in:
Rui Ueyama 2017-04-25 04:44:54 +00:00
parent 490397fc08
commit a2a46a9532
1 changed files with 2 additions and 5 deletions
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7
lld/ELF/Writer.cpp
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@ -858,11 +858,8 @@ template <class ELFT> void Writer<ELFT>::addReservedSymbols() {
// __tls_get_addr is defined by the dynamic linker for dynamic ELFs. For // __tls_get_addr is defined by the dynamic linker for dynamic ELFs. For
// static linking the linker is required to optimize away any references to // static linking the linker is required to optimize away any references to
// __tls_get_addr, so it's not defined anywhere. Create a hidden definition // __tls_get_addr, so it's not defined anywhere. Create a hidden definition
// to avoid the undefined symbol error. As usual special cases are ARM and // to avoid the undefined symbol error.
// MIPS - the libc for these targets defines __tls_get_addr itself because if (!In<ELFT>::DynSymTab)
// there are no TLS optimizations for these targets.
if (!In<ELFT>::DynSymTab &&
(Config->EMachine != EM_MIPS && Config->EMachine != EM_ARM))
Symtab<ELFT>::X->addIgnored("__tls_get_addr"); Symtab<ELFT>::X->addIgnored("__tls_get_addr");
// If linker script do layout we do not need to create any standart symbols. // If linker script do layout we do not need to create any standart symbols.