summaryrefslogtreecommitdiffstats
path: root/lldb/packages/Python/lldbsuite/test/functionalities/recursion/main.cpp
diff options
context:
space:
mode:
authorFangrui Song <maskray@google.com>2019-07-11 10:10:09 +0000
committerFangrui Song <maskray@google.com>2019-07-11 10:10:09 +0000
commitf9ca13cb5f05f2a1acce223e794444078584ef0d (patch)
tree402515c903d7548289f99535627d2571d1cf9b1a /lldb/packages/Python/lldbsuite/test/functionalities/recursion/main.cpp
parent63f5235978568421adecba44af88cca0a13019c2 (diff)
downloadbcm5719-llvm-f9ca13cb5f05f2a1acce223e794444078584ef0d.tar.gz
bcm5719-llvm-f9ca13cb5f05f2a1acce223e794444078584ef0d.zip
[X86] -fno-plt: use GOT __tls_get_addr only if GOTPCRELX is enabled
Summary: As of binutils 2.32, ld has a bogus TLS relaxation error when the GD/LD code sequence using R_X86_64_GOTPCREL (instead of R_X86_64_GOTPCRELX) is attempted to be relaxed to IE/LE (binutils PR24784). gold and lld are good. In gcc/config/i386/i386.md, there is a configure-time check of as/ld support and the GOT relaxation will not be used if as/ld doesn't support it: if (flag_plt || !HAVE_AS_IX86_TLS_GET_ADDR_GOT) return "call\t%P2"; return "call\t{*%p2@GOT(%1)|[DWORD PTR %p2@GOT[%1]]}"; In clang, -DENABLE_X86_RELAX_RELOCATIONS=OFF is the default. The ld.bfd bogus error can be reproduced with: thread_local int a; int main() { return a; } clang -fno-plt -fpic a.cc -fuse-ld=bfd GOTPCRELX gained relative good support in 2016, which is considered relatively new. It is even difficult to conditionally default to -DENABLE_X86_RELAX_RELOCATIONS=ON due to cross compilation reasons. So work around the ld.bfd bug by only using GOT when GOTPCRELX is enabled. Reviewers: dalias, hjl.tools, nikic, rnk Reviewed By: nikic Subscribers: llvm-commits Tags: #llvm Differential Revision: https://reviews.llvm.org/D64304 llvm-svn: 365752
Diffstat (limited to 'lldb/packages/Python/lldbsuite/test/functionalities/recursion/main.cpp')
0 files changed, 0 insertions, 0 deletions
OpenPOWER on IntegriCloud