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authorUlrich Drepper <drepper@redhat.com>2009-03-16 02:16:30 +0000
committerUlrich Drepper <drepper@redhat.com>2009-03-16 02:16:30 +0000
commit2ca285b098890abde89fc79bbaf69432b14f18d1 (patch)
treed08f6c7bd1d6b3d5d11eeb3a311650afdf317a4c
parent7e342603659dddcb768a516b93844870884ad2c4 (diff)
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[BZ #9733]
* elf/dl-load.c (_dl_map_object_from_fd): Only call audit hooks if we are not loading a new audit library. * elf/dl-reloc (_dl_relocate_object): Third parameter is now a bitmask. Only use profiling trampoline for auditing if we are not relocating an audit library. * elf/dl-open.c (dl_open_worker): Adjust _dl_relocate_object call. * elf/rtld.c: Likewise. * sysdeps/generic/ldsodefs.h: Adjust _dl_relocate_object prototype.
-rw-r--r--ChangeLog10
-rw-r--r--elf/dl-load.c3
-rw-r--r--elf/dl-open.c11
-rw-r--r--elf/dl-reloc.c8
-rw-r--r--elf/rtld.c12
-rw-r--r--sysdeps/generic/ldsodefs.h4
6 files changed, 32 insertions, 16 deletions
diff --git a/ChangeLog b/ChangeLog
index 82bd124..8911e97 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,15 @@
2009-03-15 Ulrich Drepper <drepper@redhat.com>
+ [BZ #9733]
+ * elf/dl-load.c (_dl_map_object_from_fd): Only call audit hooks
+ if we are not loading a new audit library.
+ * elf/dl-reloc (_dl_relocate_object): Third parameter is now a bitmask.
+ Only use profiling trampoline for auditing if we are not relocating
+ an audit library.
+ * elf/dl-open.c (dl_open_worker): Adjust _dl_relocate_object call.
+ * elf/rtld.c: Likewise.
+ * sysdeps/generic/ldsodefs.h: Adjust _dl_relocate_object prototype.
+
* elf/rtld.c (dl_main): Extend help message for --audit option.
[BZ #9759]
diff --git a/elf/dl-load.c b/elf/dl-load.c
index c77c259..0deb51e 100644
--- a/elf/dl-load.c
+++ b/elf/dl-load.c
@@ -941,7 +941,8 @@ _dl_map_object_from_fd (const char *name, int fd, struct filebuf *fbp,
{
#ifdef SHARED
/* Auditing checkpoint: we are going to add new objects. */
- if (__builtin_expect (GLRO(dl_naudit) > 0, 0))
+ if ((mode & __RTLD_AUDIT) == 0
+ && __builtin_expect (GLRO(dl_naudit) > 0, 0))
{
struct link_map *head = GL(dl_ns)[nsid]._ns_loaded;
/* Do not call the functions for any auditing object. */
diff --git a/elf/dl-open.c b/elf/dl-open.c
index f825aa0..75dc7bc 100644
--- a/elf/dl-open.c
+++ b/elf/dl-open.c
@@ -1,5 +1,5 @@
/* Load a shared object at runtime, relocate it, and run its initializer.
- Copyright (C) 1996-2004, 2005, 2006, 2007 Free Software Foundation, Inc.
+ Copyright (C) 1996-2007, 2009 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
@@ -207,7 +207,6 @@ dl_open_worker (void *a)
const char *file = args->file;
int mode = args->mode;
struct link_map *new;
- int lazy;
unsigned int i;
bool any_tls = false;
struct link_map *call_map = NULL;
@@ -366,7 +365,9 @@ dl_open_worker (void *a)
_dl_debug_state ();
/* Only do lazy relocation if `LD_BIND_NOW' is not set. */
- lazy = (mode & RTLD_BINDING_MASK) == RTLD_LAZY && GLRO(dl_lazy);
+ int reloc_mode = mode & __RTLD_AUDIT;
+ if (GLRO(dl_lazy))
+ reloc_mode |= mode & RTLD_LAZY;
/* Relocate the objects loaded. We do this in reverse order so that copy
relocs of earlier objects overwrite the data written by later objects. */
@@ -388,7 +389,7 @@ dl_open_worker (void *a)
start the profiling. */
struct link_map *old_profile_map = GL(dl_profile_map);
- _dl_relocate_object (l, l->l_scope, 1, 1);
+ _dl_relocate_object (l, l->l_scope, reloc_mode | RTLD_LAZY, 1);
if (old_profile_map == NULL && GL(dl_profile_map) != NULL)
{
@@ -401,7 +402,7 @@ dl_open_worker (void *a)
}
else
#endif
- _dl_relocate_object (l, l->l_scope, lazy, 0);
+ _dl_relocate_object (l, l->l_scope, reloc_mode, 0);
}
if (l == new)
diff --git a/elf/dl-reloc.c b/elf/dl-reloc.c
index a303cb4..28f08de 100644
--- a/elf/dl-reloc.c
+++ b/elf/dl-reloc.c
@@ -1,5 +1,5 @@
/* Relocate a shared object and resolve its references to other loaded objects.
- Copyright (C) 1995-2004, 2005, 2006, 2008 Free Software Foundation, Inc.
+ Copyright (C) 1995-2006, 2008, 2009 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
@@ -151,7 +151,7 @@ _dl_nothread_init_static_tls (struct link_map *map)
void
_dl_relocate_object (struct link_map *l, struct r_scope_elem *scope[],
- int lazy, int consider_profiling)
+ int reloc_mode, int consider_profiling)
{
struct textrels
{
@@ -162,10 +162,12 @@ _dl_relocate_object (struct link_map *l, struct r_scope_elem *scope[],
} *textrels = NULL;
/* Initialize it to make the compiler happy. */
const char *errstring = NULL;
+ int lazy = reloc_mode & RTLD_LAZY;
#ifdef SHARED
/* If we are auditing, install the same handlers we need for profiling. */
- consider_profiling |= GLRO(dl_audit) != NULL;
+ if ((reloc_mode & __RTLD_AUDIT) == 0)
+ consider_profiling |= GLRO(dl_audit) != NULL;
#elif defined PROF
/* Never use dynamic linker profiling for gprof profiling code. */
# define consider_profiling 0
diff --git a/elf/rtld.c b/elf/rtld.c
index 5282d2c..bfe9564 100644
--- a/elf/rtld.c
+++ b/elf/rtld.c
@@ -574,7 +574,7 @@ _dl_start (void *arg)
struct relocate_args
{
struct link_map *l;
- int lazy;
+ int reloc_mode;
};
struct map_args
@@ -613,7 +613,7 @@ relocate_doit (void *a)
{
struct relocate_args *args = (struct relocate_args *) a;
- _dl_relocate_object (args->l, args->l->l_scope, args->lazy, 0);
+ _dl_relocate_object (args->l, args->l->l_scope, args->reloc_mode, 0);
}
static void
@@ -1909,7 +1909,9 @@ ERROR: ld.so: object '%s' cannot be loaded as audit interface: %s; ignored.\n",
struct link_map *l = main_map;
/* Relocate the main executable. */
- struct relocate_args args = { .l = l, .lazy = GLRO(dl_lazy) };
+ struct relocate_args args = { .l = l,
+ .reloc_mode = (GLRO(dl_lazy)
+ ? RTLD_LAZY : 0) };
_dl_receive_error (print_unresolved, relocate_doit, &args);
/* This loop depends on the dependencies of the executable to
@@ -1986,7 +1988,7 @@ ERROR: ld.so: object '%s' cannot be loaded as audit interface: %s; ignored.\n",
struct relocate_args args;
struct link_map *l;
- args.lazy = GLRO(dl_lazy);
+ args.reloc_mode = GLRO(dl_lazy) ? RTLD_LAZY : 0;
l = main_map;
while (l->l_next != NULL)
@@ -2226,7 +2228,7 @@ ERROR: ld.so: object '%s' cannot be loaded as audit interface: %s; ignored.\n",
}
if (l != &GL(dl_rtld_map))
- _dl_relocate_object (l, l->l_scope, GLRO(dl_lazy),
+ _dl_relocate_object (l, l->l_scope, GLRO(dl_lazy) ? RTLD_LAZY : 0,
consider_profiling);
/* Add object to slot information data if necessasy. */
diff --git a/sysdeps/generic/ldsodefs.h b/sysdeps/generic/ldsodefs.h
index e00b173..943369b 100644
--- a/sysdeps/generic/ldsodefs.h
+++ b/sysdeps/generic/ldsodefs.h
@@ -882,10 +882,10 @@ extern struct link_map *_dl_new_object (char *realname, const char *libname,
/* Relocate the given object (if it hasn't already been).
SCOPE is passed to _dl_lookup_symbol in symbol lookups.
- If LAZY is nonzero, don't relocate its PLT. */
+ If RTLD_LAZY is set in RELOC-MODE, don't relocate its PLT. */
extern void _dl_relocate_object (struct link_map *map,
struct r_scope_elem *scope[],
- int lazy, int consider_profiling)
+ int reloc_mode, int consider_profiling)
attribute_hidden;
/* Protect PT_GNU_RELRO area. */