From c928de790200bc7a81224377d35a91a6103387de Mon Sep 17 00:00:00 2001
From: Roland McGrath <roland@gnu.org>
Date: Sun, 14 Jul 1996 10:04:21 +0000
Subject: * elf/dl-deps.c (_dl_map_object_deps): Start TAILP at last preload.
* elf/dl-open.c (_dl_open): Force an indirect call for
_dl_relocate_object so there is no chance a PLT fixup will be done
and clobber _dl_global_scope before our call happens.
* sysdeps/i386/fpu/__math.h (tan): Correct output constraint from =u
to =t; must operate on top of fp reg stack, not second from top.
Correct input constraint to 0 from t; must be explicit when input and
output are the same register.
(floor): Use __volatile instead of volatile.
(ceil): Likewise.
* manual/Makefile ($(objpfx)stamp%-$(subdir)): Separate rule from
other targets.
---
elf/dl-open.c | 12 ++++++++++--
1 file changed, 10 insertions(+), 2 deletions(-)
(limited to 'elf/dl-open.c')
diff --git a/elf/dl-open.c b/elf/dl-open.c
index 058c3e5..021c4be 100644
--- a/elf/dl-open.c
+++ b/elf/dl-open.c
@@ -52,8 +52,16 @@ _dl_open (const char *file, int mode)
{
if (! l->l_relocated)
{
- _dl_relocate_object (l, _dl_object_relocation_scope (l),
- (mode & RTLD_BINDING_MASK) == RTLD_LAZY);
+ /* We use an indirect call call for _dl_relocate_object because
+ we must avoid using the PLT in the call. If our PLT entry for
+ _dl_relocate_object hasn't been used yet, then the dynamic
+ linker fixup routine will clobber _dl_global_scope during its
+ work. We must be sure that nothing will require a PLT fixup
+ between when _dl_object_relocation_scope returns and when we
+ enter the dynamic linker's code (_dl_relocate_object). */
+ __typeof (_dl_relocate_object) *reloc = &_dl_relocate_object;
+ (*reloc) (l, _dl_object_relocation_scope (l),
+ (mode & RTLD_BINDING_MASK) == RTLD_LAZY);
*_dl_global_scope_end = NULL;
}
--
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