[glibc/release/2.34/master] debug: Mark libSegFault.so as NODELETE

[glibc/release/2.34/master] debug: Mark libSegFault.so as NODELETE

[Florian Weimer]

https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=23ee92deea4c99d0e6a5f48fa7b942909b123ec5

commit 23ee92deea4c99d0e6a5f48fa7b942909b123ec5
Author: Florian Weimer <fweimer@redhat.com>
Date:   Thu Jul 20 18:31:48 2023 +0200

    debug: Mark libSegFault.so as NODELETE
    
    The signal handler installed in the ELF constructor cannot easily
    be removed again (because the program may have changed handlers
    in the meantime).  Mark the object as NODELETE so that the registered
    handler function is never unloaded.
    
    Reviewed-by: Carlos O'Donell <carlos@redhat.com>

Diff:
---
 debug/Makefile | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/debug/Makefile b/debug/Makefile
index 71248e0d45..9fbc40dc69 100644
--- a/debug/Makefile
+++ b/debug/Makefile
@@ -213,6 +213,8 @@ extra-libs-others = $(extra-libs)
 
 libSegFault-routines = segfault
 libSegFault-inhibit-o = $(filter-out .os,$(object-suffixes))
+# libSegFault.so installs a signal handler in its ELF constructor.
+LDFLAGS-SegFault.so = -Wl,--enable-new-dtags,-z,nodelete
 
 libpcprofile-routines = pcprofile
 libpcprofile-inhibit-o = $(filter-out .os,$(object-suffixes))