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From: Florian Weimer <fw@sourceware.org> To: glibc-cvs@sourceware.org Subject: [glibc] aarch64: Accept PLT calls to __getauxval within libc.so Date: Tue, 12 May 2020 10:51:28 +0000 (GMT) [thread overview] Message-ID: <20200512105128.E5D22389781E@sourceware.org> (raw) https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=16536e98e36e08bc1ce1edbd8dd50c7c3bb7a936 commit 16536e98e36e08bc1ce1edbd8dd50c7c3bb7a936 Author: Florian Weimer <fweimer@redhat.com> Date: Tue May 12 11:30:30 2020 +0200 aarch64: Accept PLT calls to __getauxval within libc.so When using outline atomics (-moutline-atomics, the default for ARMv8-A starting with GCC 10), libgcc contains an ELF constructor which calls __getauxval. This code is built outside of glibc, so none of its internal PLT avoidance schemes can be applied to it. This change suppresses the elf/check-localplt failure. Diff: --- sysdeps/unix/sysv/linux/aarch64/localplt.data | 3 +++ 1 file changed, 3 insertions(+) diff --git a/sysdeps/unix/sysv/linux/aarch64/localplt.data b/sysdeps/unix/sysv/linux/aarch64/localplt.data index 56f362d3a7..2c14b652ef 100644 --- a/sysdeps/unix/sysv/linux/aarch64/localplt.data +++ b/sysdeps/unix/sysv/linux/aarch64/localplt.data @@ -7,6 +7,9 @@ libc.so: malloc libc.so: memalign libc.so: realloc libm.so: matherr +# If outline atomics are used, libgcc (built outside of glibc) may +# call __getauxval using the PLT. +libc.so: __getauxval ? # The dynamic loader needs __tls_get_addr for TLS. ld.so: __tls_get_addr # The TLS-enabled version of these functions is interposed from libc.so.
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