From: Aurelien Jarno <aurelien@aurel32.net>
To: libc-stable@sourceware.org
Cc: Florian Weimer <fweimer@redhat.com>
Subject: [COMMITTED 2.31] aarch64: Accept PLT calls to __getauxval within libc.so
Date: Tue, 12 May 2020 19:55:39 +0200 [thread overview]
Message-ID: <20200512175539.228580-1-aurelien@aurel32.net> (raw)
From: Florian Weimer <fweimer@redhat.com>
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/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 a60053b9144..08af68b5e84 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 main malloc is interposed into the dynamic linker, for
--
2.26.2
reply other threads:[~2020-05-12 17:56 UTC|newest]
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