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| author | Fangrui Song <i@maskray.me> | 2022-04-14 11:32:29 -0700 |
|---|---|---|
| committer | Fangrui Song <i@maskray.me> | 2022-04-14 11:32:30 -0700 |
| commit | 02eab52866775f1476028129d1b114235fddc127 (patch) | |
| tree | 964b3f1097e4f4655188c319e7e63ef7430310ca /lldb/source/Plugins/Process/gdb-remote/ProcessGDBRemote.cpp | |
| parent | 2c2568f39ec641aa8f1dcc011f2ce642c2d3423f (diff) | |
| download | llvm-02eab52866775f1476028129d1b114235fddc127.zip llvm-02eab52866775f1476028129d1b114235fddc127.tar.gz llvm-02eab52866775f1476028129d1b114235fddc127.tar.bz2 | |
[ELF][AArch64] Fix unneeded thunk for branches to hidden undefined weak
Similar to D119787 for PPC64.
A hidden undefined weak may change its binding to local before some
`isUndefinedWeak` code, so some `isUndefinedWeak` code needs to be changed to
`isUndefined`. The undefined non-weak case has been errored, so just using
`isUndefined` is fine.
The Linux kernel recently has a usage that a branch from 0xffff800008491ee0
references a hidden undefined weak symbol `vfio_group_set_kvm`.
It relies on the behavior that a branch to undefined weak resolving to the next
instruction, otherwise it'd see spurious relocation out of range errors.
Fixes https://github.com/ClangBuiltLinux/linux/issues/1624
Differential Revision: https://reviews.llvm.org/D123750
Diffstat (limited to 'lldb/source/Plugins/Process/gdb-remote/ProcessGDBRemote.cpp')
0 files changed, 0 insertions, 0 deletions