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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/s390 | |
| 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 'sysdeps/unix/sysv/linux/s390')
| -rw-r--r-- | sysdeps/unix/sysv/linux/s390/pt-vfork.S | 1 | ||||
| -rw-r--r-- | sysdeps/unix/sysv/linux/s390/s390-32/libpthread.abilist | 3 | ||||
| -rw-r--r-- | sysdeps/unix/sysv/linux/s390/s390-64/libpthread.abilist | 2 |
3 files changed, 1 insertions, 5 deletions
diff --git a/sysdeps/unix/sysv/linux/s390/pt-vfork.S b/sysdeps/unix/sysv/linux/s390/pt-vfork.S deleted file mode 100644 index 65cc3823ac..0000000000 --- a/sysdeps/unix/sysv/linux/s390/pt-vfork.S +++ /dev/null @@ -1 +0,0 @@ -#include <sysdeps/unix/sysv/linux/alpha/pt-vfork.S> diff --git a/sysdeps/unix/sysv/linux/s390/s390-32/libpthread.abilist b/sysdeps/unix/sysv/linux/s390/s390-32/libpthread.abilist index d05468f3b2..f093634d7e 100644 --- a/sysdeps/unix/sysv/linux/s390/s390-32/libpthread.abilist +++ b/sysdeps/unix/sysv/linux/s390/s390-32/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 diff --git a/sysdeps/unix/sysv/linux/s390/s390-64/libpthread.abilist b/sysdeps/unix/sysv/linux/s390/s390-64/libpthread.abilist index e8161aa747..47204f166c 100644 --- a/sysdeps/unix/sysv/linux/s390/s390-64/libpthread.abilist +++ b/sysdeps/unix/sysv/linux/s390/s390-64/libpthread.abilist @@ -48,7 +48,6 @@ GLIBC_2.2 __read F GLIBC_2.2 __res_state F GLIBC_2.2 __send F GLIBC_2.2 __sigaction F -GLIBC_2.2 __vfork F GLIBC_2.2 __wait F GLIBC_2.2 __write F GLIBC_2.2 _pthread_cleanup_pop F @@ -194,7 +193,6 @@ GLIBC_2.2 siglongjmp F GLIBC_2.2 sigwait F GLIBC_2.2 system F GLIBC_2.2 tcdrain F -GLIBC_2.2 vfork F GLIBC_2.2 wait F GLIBC_2.2 waitpid F GLIBC_2.2 write F |