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authorFlorian Weimer <fweimer@redhat.com>2019-07-02 15:12:20 +0200
committerFlorian Weimer <fweimer@redhat.com>2019-07-02 16:51:13 +0200
commit41d6f74e6cb6a92ab428c11ee1e408b2a16aa1b0 (patch)
treeece03ae53e8fd589f2c493cb753c132545a49196 /sysdeps/aarch64/dl-irel.h
parent27cec9aed97447dff887a88f4241604fffd8c525 (diff)
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nptl: Remove vfork IFUNC-based forwarder from libpthread [BZ #20188]
With commit f0b2132b35248c1f4a80f62a2c38cddcc802aa8c ("ld.so:
Support moving versioned symbols between sonames [BZ #24741]"), the
dynamic linker will find the definition of vfork in libc and binds
a vfork reference to that symbol, even if the soname in the version
reference says that the symbol should be located in libpthread.

As a result, the forwarder (whether it's IFUNC-based or a duplicate
of the libc implementation) is no longer necessary.

On older architectures, a placeholder symbol is required, to make sure
that the GLIBC_2.1.2 symbol version does not go away, or is turned in
to a weak symbol definition by the link editor.  (The symbol version
needs to preserved so that the symbol coverage check in
elf/dl-version.c does not fail for old binaries.)

mips32 is an outlier: It defined __vfork@@GLIBC_2.2, but the
baseline is GLIBC_2.0.  Since there are other @@GLIBC_2.2 symbols,
the placeholder symbol is not needed there.
Diffstat (limited to 'sysdeps/aarch64/dl-irel.h')
0 files changed, 0 insertions, 0 deletions