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glibc/sysdeps/powerpc/powerpc32
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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
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a2 Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
bits
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cell Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
fpu Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
power4 Add libm_alias_finite for _finite symbols 2020-01-03 10:02:04 -03:00
power5 powerpc: Remove optimized isnan 2019-06-12 14:32:36 -03:00
power5+ powerpc: Refactor powerpc32 lround/lroundf/llround/llroundf 2019-06-26 14:32:45 -03:00
power6 Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
power6x Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
power7 Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
power8
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power9
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Implies
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Implies-after powerpc: Move around math-related Implies 2018-05-24 22:49:10 -03:00
Makefile
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Versions
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backtrace.c elf: Move vDSO setup to rtld (BZ#24967) 2020-01-03 11:22:07 -03:00
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