[glibc/release/2.33/master] debug: Mark libSegFault.so as NODELETE

[glibc/release/2.33/master] debug: Mark libSegFault.so as NODELETE

[Florian Weimer]

https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=aef97dc952a6af0cbf4b2408993745fa97d89a2b

commit aef97dc952a6af0cbf4b2408993745fa97d89a2b
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>
    (cherry picked from commit 23ee92deea4c99d0e6a5f48fa7b942909b123ec5)

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

diff --git a/debug/Makefile b/debug/Makefile
index 3f66666c6c..60d69397f9 100644
--- a/debug/Makefile
+++ b/debug/Makefile
@@ -168,6 +168,8 @@ 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))