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| author | Cary Coutant <ccoutant@google.com> | 2015-04-09 15:47:13 -0700 |
|---|---|---|
| committer | Cary Coutant <ccoutant@google.com> | 2015-04-09 15:47:37 -0700 |
| commit | a6a177507c8b677e79b3440e36091cb0270c55b8 (patch) | |
| tree | d4c54714d9b8c17c35580033a468015ce2b88273 /gold/symtab.cc | |
| parent | 18ece1defb99cf50dc7769444e3394c26329d497 (diff) | |
| download | gdb-a6a177507c8b677e79b3440e36091cb0270c55b8.zip gdb-a6a177507c8b677e79b3440e36091cb0270c55b8.tar.gz gdb-a6a177507c8b677e79b3440e36091cb0270c55b8.tar.bz2 | |
Allow gold to resolve defined TLS symbols in a PIE link.
This patch fixes Symbol::final_value_is_known so that a defined TLS symbol
in a PIE link is treated as having a known final value, thus allowing
GD->LE TLS optimization, eliminating an unnecessary GOT entry and dynamic
relocation.
gold/
* symtab.cc (Symbol::final_value_is_known): Check for TLS symbol
in a PIE link.
* testsuite/Makefile.am (tls_pie_test.sh): New test.
* testsuite/Makefile.in: Regenerate.
* testsuite/tls_pie_test.sh: New.
Diffstat (limited to 'gold/symtab.cc')
| -rw-r--r-- | gold/symtab.cc | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/gold/symtab.cc b/gold/symtab.cc index 88e9322..8ec8f73 100644 --- a/gold/symtab.cc +++ b/gold/symtab.cc @@ -437,9 +437,12 @@ bool Symbol::final_value_is_known() const { // If we are not generating an executable, then no final values are - // known, since they will change at runtime. - if (parameters->options().output_is_position_independent() - || parameters->options().relocatable()) + // known, since they will change at runtime, with the exception of + // TLS symbols in a position-independent executable. + if ((parameters->options().output_is_position_independent() + || parameters->options().relocatable()) + && !(this->type() == elfcpp::STT_TLS + && parameters->options().pie())) return false; // If the symbol is not from an object file, and is not undefined, |