File aarch64-getauxval.patch of Package glibc.25649

Overview Repositories Revisions Requests Users Attributes Meta

File aarch64-getauxval.patch of Package glibc.25649

From 16536e98e36e08bc1ce1edbd8dd50c7c3bb7a936 Mon Sep 17 00:00:00 2001
From: Florian Weimer <fweimer@redhat.com>
Date: Tue, 12 May 2020 11:30:30 +0200
Subject: [PATCH] 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.
---
 sysdeps/unix/sysv/linux/aarch64/localplt.data | 3 +++
 1 file changed, 3 insertions(+)

Index: glibc-2.31/sysdeps/unix/sysv/linux/aarch64/localplt.data
===================================================================
--- glibc-2.31.orig/sysdeps/unix/sysv/linux/aarch64/localplt.data
+++ glibc-2.31/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

Places

File aarch64-getauxval.patch of Package glibc.25649

Places