glibc/glibc-rh1410154-4.patch

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commit fcb04b9aed26a737159ef7be9c5a6ad0994437dc
Author: Florian Weimer <fweimer@redhat.com>
Date: Thu Oct 31 13:28:49 2019 +0100
Introduce DL_LOOKUP_FOR_RELOCATE flag for _dl_lookup_symbol_x
This will allow changes in dependency processing during non-lazy
binding, for more precise processing of NODELETE objects: During
initial relocation in dlopen, the fate of NODELETE objects is still
unclear, so objects which are depended upon by NODELETE objects
cannot immediately be marked as NODELETE.
Change-Id: Ic7b94a3f7c4719a00ca8e6018088567824da0658
diff --git a/elf/dl-reloc.c b/elf/dl-reloc.c
index 053916eeae50467c..afeace4d3e49180c 100644
--- a/elf/dl-reloc.c
+++ b/elf/dl-reloc.c
@@ -248,7 +248,8 @@ _dl_relocate_object (struct link_map *l, struct r_scope_elem *scope[],
v = (version); \
_lr = _dl_lookup_symbol_x (strtab + (*ref)->st_name, l, (ref), \
scope, v, _tc, \
- DL_LOOKUP_ADD_DEPENDENCY, NULL); \
+ DL_LOOKUP_ADD_DEPENDENCY \
+ | DL_LOOKUP_FOR_RELOCATE, NULL); \
l->l_lookup_cache.ret = (*ref); \
l->l_lookup_cache.value = _lr; })) \
: l)
diff --git a/sysdeps/generic/ldsodefs.h b/sysdeps/generic/ldsodefs.h
index cc2484033fe0d902..6c5298a80bff8e96 100644
--- a/sysdeps/generic/ldsodefs.h
+++ b/sysdeps/generic/ldsodefs.h
@@ -908,6 +908,9 @@ enum
DL_LOOKUP_RETURN_NEWEST = 2,
/* Set if dl_lookup* called with GSCOPE lock held. */
DL_LOOKUP_GSCOPE_LOCK = 4,
+ /* Set if dl_lookup is called for non-lazy relocation processing
+ from _dl_relocate_object in elf/dl-reloc.c. */
+ DL_LOOKUP_FOR_RELOCATE = 8,
};
/* Lookup versioned symbol. */