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* [COMMITTED 2.31] aarch64: Accept PLT calls to __getauxval within
@ 2020-05-12 17:55 Aurelien Jarno
  0 siblings, 0 replies; only message in thread
From: Aurelien Jarno @ 2020-05-12 17:55 UTC (permalink / raw)
  To: libc-stable; +Cc: Florian Weimer

From: Florian Weimer <>

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.

(cherry picked from commit 16536e98e36e08bc1ce1edbd8dd50c7c3bb7a936)
(cherry picked from commit 587a332b6fadc4d9f1035ecaa52ba32ee41cd300)
 sysdeps/unix/sysv/linux/aarch64/ | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/sysdeps/unix/sysv/linux/aarch64/ b/sysdeps/unix/sysv/linux/aarch64/
index a60053b9144..08af68b5e84 100644
--- a/sysdeps/unix/sysv/linux/aarch64/
+++ b/sysdeps/unix/sysv/linux/aarch64/
@@ -7,6 +7,9 @@ malloc memalign realloc matherr
+# If outline atomics are used, libgcc (built outside of glibc) may
+# call __getauxval using the PLT. __getauxval ?
 # The dynamic loader needs __tls_get_addr for TLS. __tls_get_addr
 # The main malloc is interposed into the dynamic linker, for

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2020-05-12 17:55 [COMMITTED 2.31] aarch64: Accept PLT calls to __getauxval within Aurelien Jarno

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