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| author |   Florian Weimer <fweimer@redhat.com> | 2019-07-02 15:12:20 +0200 |
|---|---|---|
| committer | Florian Weimer <fweimer@redhat.com> | 2019-07-02 16:51:13 +0200 |
| commit | 41d6f74e6cb6a92ab428c11ee1e408b2a16aa1b0 (patch) | |
| tree | ece03ae53e8fd589f2c493cb753c132545a49196 /nptl/Versions | |
| parent | malloc: Add nptl, htl dependency for the subdirectory [BZ #24757] (diff) | |
| download | glibc-41d6f74e6cb6a92ab428c11ee1e408b2a16aa1b0.tar.gz glibc-41d6f74e6cb6a92ab428c11ee1e408b2a16aa1b0.tar.bz2 glibc-41d6f74e6cb6a92ab428c11ee1e408b2a16aa1b0.zip | |
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 'nptl/Versions')
| -rw-r--r-- | nptl/Versions | 5 |
1 files changed, 2 insertions, 3 deletions
diff --git a/nptl/Versions b/nptl/Versions index e7f691da7a..6007fd03e7 100644 --- a/nptl/Versions +++ b/nptl/Versions @@ -36,7 +36,6 @@ libc { __libc_alloca_cutoff; # Internal libc interface to libpthread __libc_dl_error_tsd; - __libc_vfork; __libc_pthread_init; __libc_current_sigrtmin_private; __libc_current_sigrtmax_private; __libc_allocate_rtsig_private; @@ -98,7 +97,7 @@ libpthread { sem_destroy; sem_getvalue; sem_init; sem_post; sem_trywait; sem_wait; # Special fork handling. - fork; __fork; vfork; + fork; __fork; # Cancellation points. close; __close; fcntl; __fcntl; read; __read; write; __write; accept; @@ -152,7 +151,7 @@ libpthread { } GLIBC_2.1.2 { - __vfork; + __libpthread_version_placeholder; } GLIBC_2.2 { |