1
0
mirror of https://sourceware.org/git/glibc.git synced 2025-07-28 00:21:52 +03:00
Files
glibc/sysdeps/powerpc/powerpc32
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
..
2013-10-04 16:02:33 +00:00
2013-10-04 16:02:33 +00:00
2016-11-04 09:37:44 -07:00
2019-06-12 14:32:36 -03:00
2016-09-19 09:35:38 -03:00
2015-02-10 06:09:22 -05:00
2015-02-10 06:09:22 -05:00
2013-10-04 16:02:33 +00:00
2013-10-04 10:38:28 +09:30
2013-09-23 00:52:09 -04:00