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1bdda52fe9
glibc/sysdeps/unix/sysv/linux/powerpc
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Adhemerval Zanella 1bdda52fe9 elf: Move vDSO setup to rtld (BZ#24967) 
This patch moves the vDSO setup from libc to loader code, just after
the vDSO link_map setup.  For static case the initialization
is moved to _dl_non_dynamic_init instead.

Instead of using the mangled pointer, the vDSO data is set as
attribute_relro (on _rtld_global_ro for shared or _dl_vdso_* for
static).  It is read-only even with partial relro.

It fixes BZ#24967 now that the vDSO pointer is setup earlier than
malloc interposition is called.

Also, vDSO calls should not be a problem for static dlopen as
indicated by BZ#20802.  The vDSO pointer would be zero-initialized
and the syscall will be issued instead.

Checked on x86_64-linux-gnu, i686-linux-gnu, aarch64-linux-gnu,
arm-linux-gnueabihf, powerpc64le-linux-gnu, powerpc64-linux-gnu,
powerpc-linux-gnu, s390x-linux-gnu, sparc64-linux-gnu, and
sparcv9-linux-gnu.  I also run some tests on mips.

Reviewed-by: Siddhesh Poyarekar <siddhesh@sourceware.org>
2020-01-03 11:22:07 -03:00
..
bits Update copyright dates not handled by scripts/update-copyrights. 2020-01-01 00:21:22 +00:00
powerpc32 Linux: Add tables with system call numbers 2020-01-02 10:18:10 +01:00
powerpc64 Linux: Add tables with system call numbers 2020-01-02 10:18:10 +01:00
sys Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
configure Move architecture cases out of sysdeps/unix/sysv/linux/configure.ac. 2014-06-24 20:53:03 +00:00
configure.ac Move architecture cases out of sysdeps/unix/sysv/linux/configure.ac. 2014-06-24 20:53:03 +00:00
dl-brk.S
dl-cache.h
dl-static.c Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
dl-sysdep.c Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
elision-conf.c Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
elision-conf.h Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
elision-lock.c Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
elision-timed.c Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
elision-trylock.c Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
elision-unlock.c Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
force-elision.h Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
get_timebase_freq.c elf: Move vDSO setup to rtld (BZ#24967) 2020-01-03 11:22:07 -03:00
gettimeofday.c linux: Consolidate Linux gettimeofday 2020-01-03 11:21:50 -03:00
htm.h Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
Implies NPTL is no longer an add-on! 2014-07-07 09:29:06 -07:00
ioctl.c Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
ipc_priv.h Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
kernel_sigaction.h m68k: Fix sigaction kernel definition (BZ #23960) 2018-12-18 16:45:10 -02:00
kernel_termios.h Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
kernel-features.h Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
ldconfig.h Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
ldd-rewrite.sed
ldsodefs.h Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
libc-start.c Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
libc-start.h Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
libc-vdso.h elf: Move vDSO setup to rtld (BZ#24967) 2020-01-03 11:22:07 -03:00
lowlevellock.h Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
Makefile elf: Move vDSO setup to rtld (BZ#24967) 2020-01-03 11:22:07 -03:00
nldbl-abi.h
pt-longjmp.c Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
pthread_attr_setstack.c
pthread_attr_setstacksize.c
pthread_mutex_cond_lock.c Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
pthread_mutex_lock.c Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
pthread_mutex_timedlock.c Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
pthread_mutex_trylock.c Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
readelflib.c Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
rt-sysdep.c
sigcontextinfo.h Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
syscall.S Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
sysconf.c Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
sysdep.c Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
sysdep.h Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
test-gettimebasefreq-static.c Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
test-gettimebasefreq.c Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
test-powerpc-linux-sysconf.c Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
time.c linux: Consolidate time implementation 2020-01-03 11:22:04 -03:00
Versions Revert {send,sendm,recv,recvm}msg conformance changes 2016-06-10 11:58:16 -03:00