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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 /sysdeps/unix/sysv/linux/i386 | |
| parent | 27cec9aed97447dff887a88f4241604fffd8c525 (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/unix/sysv/linux/i386')
| -rw-r--r-- | sysdeps/unix/sysv/linux/i386/libpthread.abilist | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/sysdeps/unix/sysv/linux/i386/libpthread.abilist b/sysdeps/unix/sysv/linux/i386/libpthread.abilist index bece86d246..7199aae573 100644 --- a/sysdeps/unix/sysv/linux/i386/libpthread.abilist +++ b/sysdeps/unix/sysv/linux/i386/libpthread.abilist @@ -114,7 +114,6 @@ GLIBC_2.0 siglongjmp F GLIBC_2.0 sigwait F GLIBC_2.0 system F GLIBC_2.0 tcdrain F -GLIBC_2.0 vfork F GLIBC_2.0 wait F GLIBC_2.0 waitpid F GLIBC_2.0 write F @@ -155,7 +154,7 @@ GLIBC_2.1 sem_wait F GLIBC_2.1.1 sem_close F GLIBC_2.1.1 sem_open F GLIBC_2.1.1 sem_unlink F -GLIBC_2.1.2 __vfork F +GLIBC_2.1.2 __libpthread_version_placeholder F GLIBC_2.11 pthread_sigqueue F GLIBC_2.12 pthread_getname_np F GLIBC_2.12 pthread_mutex_consistent F |