mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-09 23:00:07 +00:00
[BZ #16046] Static dlopen correction fallout fixes.
Fixes to address issues from BZ #15022 resolution, as follows: * TLS updates to csu/libc-tls.c -- we now have a proper main map, so there's no longer a need to create a separate fake one to keep TLS structures, * random updates to elf/dl-close.c -- LM_ID_BASE is now a valid name space ID for static executables as well, so assert that we don't unload the main map. Similarly dl_nns isn't supposed to be 0 for static executables anymore, * actual BZ #16046 fix to elf/dl-iteratephdr.c -- the dl_iterate_phdr special function for static executables isn't needed anymore, provided that l_phdr and l_phnum members of the main map have been properly initialized (done in _dl_non_dynamic_init in elf/dl-support.c now), * ld.so.cache loader update to elf/dl-load.c -- GL(dl_ns)[LM_ID_BASE]._ns_loaded is now always initialized in static executables so can become the fallback loader map to check for DF_1_NODEFLIB, provided that the l_flags_1 member of the main map has been properly initialized (done in elf/dl-support.c now); this also ensures previous semantics elsewhere in elf/dl-load.c, * matching updates to elf/dl-support.c -- to complement the two fixes above.
This commit is contained in:
Maciej W. Rozycki
parent
0037bb6010
commit
0d23a5c1b1
16
ChangeLog
16
ChangeLog
@ -1,3 +1,19 @@
|
||||
2014-01-31 Maciej W. Rozycki <macro@codesourcery.com>
|
||||
|
||||
[BZ #16046]
|
||||
* csu/libc-tls.c (static_map): Remove variable.
|
||||
(__libc_setup_tls): Use main executable's link map for TLS data.
|
||||
* elf/dl-close.c (_dl_close_worker) [!SHARED]: Remove special
|
||||
casing for LM_ID_BASE and GL(dl_nns).
|
||||
* elf/dl-iteratephdr.c [!SHARED] (dl_iterate_phdr): Remove
|
||||
function. Alias dl_iterate_phdr to __dl_iterate_phdr.
|
||||
* elf/dl-load.c (_dl_map_object) [!SHARED]: Remove special
|
||||
casing for GL(dl_ns)[LM_ID_BASE]._ns_loaded.
|
||||
* elf/dl-support.c (_dl_main_map): Also initialize l_flags_1
|
||||
member.
|
||||
(_dl_non_dynamic_init): Also initialize _dl_main_map's l_phdr and
|
||||
l_phnum members.
|
||||
|
||||
2014-01-30 Alexandre Oliva <aoliva@redhat.com>
|
||||
|
||||
* manual/debug.texi: Document MTASC-safety properties.
|
||||
|
||||
14
NEWS
14
NEWS
@ -20,13 +20,13 @@ Version 2.19
|
||||
15847, 15849, 15850, 15855, 15856, 15857, 15859, 15867, 15886, 15887,
|
||||
15890, 15892, 15893, 15895, 15897, 15901, 15905, 15909, 15915, 15917,
|
||||
15919, 15921, 15923, 15939, 15941, 15948, 15963, 15966, 15985, 15988,
|
||||
15997, 16032, 16034, 16036, 16037, 16038, 16041, 16055, 16071, 16072,
|
||||
16074, 16077, 16078, 16103, 16112, 16133, 16143, 16144, 16146, 16150,
|
||||
16151, 16153, 16167, 16169, 16172, 16195, 16214, 16245, 16271, 16274,
|
||||
16283, 16289, 16293, 16314, 16316, 16330, 16337, 16338, 16356, 16365,
|
||||
16366, 16369, 16372, 16375, 16379, 16384, 16385, 16386, 16387, 16390,
|
||||
16394, 16400, 16407, 16408, 16414, 16430, 16431, 16453, 16474, 16506,
|
||||
16510
|
||||
15997, 16032, 16034, 16036, 16037, 16038, 16041, 16046, 16055, 16071,
|
||||
16072, 16074, 16077, 16078, 16103, 16112, 16133, 16143, 16144, 16146,
|
||||
16150, 16151, 16153, 16167, 16169, 16172, 16195, 16214, 16245, 16271,
|
||||
16274, 16283, 16289, 16293, 16314, 16316, 16330, 16337, 16338, 16356,
|
||||
16365, 16366, 16369, 16372, 16375, 16379, 16384, 16385, 16386, 16387,
|
||||
16390, 16394, 16400, 16407, 16408, 16414, 16430, 16431, 16453, 16474,
|
||||
16506, 16510
|
||||
|
||||
* Slovenian translations for glibc messages have been contributed by the
|
||||
Translation Project's Slovenian team of translators.
|
||||
|
||||
@ -42,9 +42,6 @@ static struct
|
||||
struct dtv_slotinfo info[2 + TLS_SLOTINFO_SURPLUS];
|
||||
} static_slotinfo;
|
||||
|
||||
/* Fake link map for the application. */
|
||||
static struct link_map static_map;
|
||||
|
||||
|
||||
/* Highest dtv index currently needed. */
|
||||
size_t _dl_tls_max_dtv_idx;
|
||||
@ -162,14 +159,16 @@ __libc_setup_tls (size_t tcbsize, size_t tcbalign)
|
||||
_dl_static_dtv[0].counter = (sizeof (_dl_static_dtv) / sizeof (_dl_static_dtv[0])) - 2;
|
||||
// _dl_static_dtv[1].counter = 0; would be needed if not already done
|
||||
|
||||
struct link_map *main_map = GL(dl_ns)[LM_ID_BASE]._ns_loaded;
|
||||
|
||||
/* Initialize the TLS block. */
|
||||
#if TLS_TCB_AT_TP
|
||||
_dl_static_dtv[2].pointer.val = ((char *) tlsblock + tcb_offset
|
||||
- roundup (memsz, align ?: 1));
|
||||
static_map.l_tls_offset = roundup (memsz, align ?: 1);
|
||||
main_map->l_tls_offset = roundup (memsz, align ?: 1);
|
||||
#elif TLS_DTV_AT_TP
|
||||
_dl_static_dtv[2].pointer.val = (char *) tlsblock + tcb_offset;
|
||||
static_map.l_tls_offset = tcb_offset;
|
||||
main_map->l_tls_offset = tcb_offset;
|
||||
#else
|
||||
# error "Either TLS_TCB_AT_TP or TLS_DTV_AT_TP must be defined"
|
||||
#endif
|
||||
@ -193,19 +192,17 @@ __libc_setup_tls (size_t tcbsize, size_t tcbalign)
|
||||
if (__builtin_expect (lossage != NULL, 0))
|
||||
__libc_fatal (lossage);
|
||||
|
||||
/* We have to create a fake link map which normally would be created
|
||||
by the dynamic linker. It just has to have enough information to
|
||||
make the TLS routines happy. */
|
||||
static_map.l_tls_align = align;
|
||||
static_map.l_tls_blocksize = memsz;
|
||||
static_map.l_tls_initimage = initimage;
|
||||
static_map.l_tls_initimage_size = filesz;
|
||||
static_map.l_type = lt_executable;
|
||||
static_map.l_tls_modid = 1;
|
||||
/* Update the executable's link map with enough information to make
|
||||
the TLS routines happy. */
|
||||
main_map->l_tls_align = align;
|
||||
main_map->l_tls_blocksize = memsz;
|
||||
main_map->l_tls_initimage = initimage;
|
||||
main_map->l_tls_initimage_size = filesz;
|
||||
main_map->l_tls_modid = 1;
|
||||
|
||||
init_slotinfo ();
|
||||
// static_slotinfo.si.slotinfo[1].gen = 0; already zero
|
||||
static_slotinfo.si.slotinfo[1].map = &static_map;
|
||||
static_slotinfo.si.slotinfo[1].map = main_map;
|
||||
|
||||
memsz = roundup (memsz, align ?: 1);
|
||||
|
||||
|
||||
@ -643,9 +643,7 @@ _dl_close_worker (struct link_map *map)
|
||||
imap->l_prev->l_next = imap->l_next;
|
||||
else
|
||||
{
|
||||
#ifdef SHARED
|
||||
assert (nsid != LM_ID_BASE);
|
||||
#endif
|
||||
ns->_ns_loaded = imap->l_next;
|
||||
|
||||
/* Update the pointer to the head of the list
|
||||
@ -736,13 +734,7 @@ _dl_close_worker (struct link_map *map)
|
||||
if (__builtin_expect (ns->_ns_loaded == NULL, 0)
|
||||
&& nsid == GL(dl_nns) - 1)
|
||||
do
|
||||
{
|
||||
--GL(dl_nns);
|
||||
#ifndef SHARED
|
||||
if (GL(dl_nns) == 0)
|
||||
break;
|
||||
#endif
|
||||
}
|
||||
--GL(dl_nns);
|
||||
while (GL(dl_ns)[GL(dl_nns) - 1]._ns_loaded == NULL);
|
||||
|
||||
/* Notify the debugger those objects are finalized and gone. */
|
||||
|
||||
@ -86,34 +86,4 @@ __dl_iterate_phdr (int (*callback) (struct dl_phdr_info *info,
|
||||
}
|
||||
hidden_def (__dl_iterate_phdr)
|
||||
|
||||
#ifdef SHARED
|
||||
|
||||
weak_alias (__dl_iterate_phdr, dl_iterate_phdr);
|
||||
|
||||
#else
|
||||
|
||||
int
|
||||
dl_iterate_phdr (int (*callback) (struct dl_phdr_info *info,
|
||||
size_t size, void *data), void *data)
|
||||
{
|
||||
if (_dl_phnum != 0)
|
||||
{
|
||||
/* This entry describes this statically-linked program itself. */
|
||||
struct dl_phdr_info info;
|
||||
int ret;
|
||||
info.dlpi_addr = 0;
|
||||
info.dlpi_name = "";
|
||||
info.dlpi_phdr = _dl_phdr;
|
||||
info.dlpi_phnum = _dl_phnum;
|
||||
info.dlpi_adds = GL(dl_load_adds);
|
||||
info.dlpi_subs = GL(dl_load_adds) - GL(dl_ns)[LM_ID_BASE]._ns_nloaded;
|
||||
ret = (*callback) (&info, sizeof (struct dl_phdr_info), data);
|
||||
if (ret)
|
||||
return ret;
|
||||
}
|
||||
|
||||
return __dl_iterate_phdr (callback, data);
|
||||
}
|
||||
|
||||
|
||||
#endif
|
||||
|
||||
@ -2233,23 +2233,17 @@ _dl_map_object (struct link_map *loader, const char *name,
|
||||
|
||||
if (cached != NULL)
|
||||
{
|
||||
# ifdef SHARED
|
||||
// XXX Correct to unconditionally default to namespace 0?
|
||||
l = (loader
|
||||
?: GL(dl_ns)[LM_ID_BASE]._ns_loaded
|
||||
?: &GL(dl_rtld_map));
|
||||
# else
|
||||
l = loader;
|
||||
# ifdef SHARED
|
||||
?: &GL(dl_rtld_map)
|
||||
# endif
|
||||
);
|
||||
|
||||
/* If the loader has the DF_1_NODEFLIB flag set we must not
|
||||
use a cache entry from any of these directories. */
|
||||
if (
|
||||
# ifndef SHARED
|
||||
/* 'l' is always != NULL for dynamically linked objects. */
|
||||
l != NULL &&
|
||||
# endif
|
||||
__builtin_expect (l->l_flags_1 & DF_1_NODEFLIB, 0))
|
||||
if (__builtin_expect (l->l_flags_1 & DF_1_NODEFLIB, 0))
|
||||
{
|
||||
const char *dirp = system_dirs;
|
||||
unsigned int cnt = 0;
|
||||
|
||||
@ -91,6 +91,7 @@ static struct link_map _dl_main_map =
|
||||
.l_scope = _dl_main_map.l_scope_mem,
|
||||
.l_local_scope = { &_dl_main_map.l_searchlist },
|
||||
.l_used = 1,
|
||||
.l_flags_1 = DF_1_NODEFLIB,
|
||||
.l_tls_offset = NO_TLS_OFFSET,
|
||||
.l_serial = 1,
|
||||
};
|
||||
@ -311,6 +312,8 @@ internal_function
|
||||
_dl_non_dynamic_init (void)
|
||||
{
|
||||
_dl_main_map.l_origin = _dl_get_origin ();
|
||||
_dl_main_map.l_phdr = GL(dl_phdr);
|
||||
_dl_main_map.l_phnum = GL(dl_phnum);
|
||||
|
||||
if (HP_TIMING_AVAIL)
|
||||
HP_TIMING_NOW (_dl_cpuclock_offset);
|
||||
|
||||
Loading…
Reference in New Issue
Block a user