File 0001-elf-avoid-redundant-sort-in-dlopen.patch of Package glibc

From 3999e1044703b878b661628041063fb4c4029e97 Mon Sep 17 00:00:00 2001
From: David Kilroy <David.Kilroy@arm.com>
Date: Wed, 12 Feb 2020 14:30:31 -0300
Subject: [PATCH 1/8] elf: avoid redundant sort in dlopen

l_initfini is already sorted by dependency in _dl_map_object_deps(),
so avoid sorting again in dl_open_worker().

Tested by running the testsuite on x86_64.
---
 elf/dl-open.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/elf/dl-open.c b/elf/dl-open.c
index ecb2ba9cc1..314adc2f7e 100644
--- a/elf/dl-open.c
+++ b/elf/dl-open.c
@@ -617,9 +617,10 @@ dl_open_worker (void *a)
   if (GLRO(dl_lazy))
     reloc_mode |= mode & RTLD_LAZY;
 
-  /* Sort the objects by dependency for the relocation process.  This
-     allows IFUNC relocations to work and it also means copy
-     relocation of dependencies are if necessary overwritten.  */
+  /* Objects must be sorted by dependency for the relocation process.
+     This allows IFUNC relocations to work and it also means copy
+     relocation of dependencies are if necessary overwritten.
+     __dl_map_object_deps has already sorted l_initfini for us.  */
   unsigned int nmaps = 0;
   unsigned int j = 0;
   struct link_map *l = new->l_initfini[0];
@@ -642,7 +643,6 @@ dl_open_worker (void *a)
       l = new->l_initfini[++j];
     }
   while (l != NULL);
-  _dl_sort_maps (maps, nmaps, NULL, false);
 
   int relocation_in_progress = 0;
 
-- 
2.35.3