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[BZ #516]

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* elf/dl-load.c: Report failed loading due to ELF class mismatch
	with better words.
This commit is contained in:
Ulrich Drepper 2005-09-26 15:58:00 +00:00
parent 76de2021b9
commit 7f71c55ddf
2 changed files with 33 additions and 14 deletions
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4
ChangeLog
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@ -1,5 +1,9 @@
2005-09-26 Ulrich Drepper <drepper@redhat.com> 2005-09-26 Ulrich Drepper <drepper@redhat.com>
[BZ #516]
* elf/dl-load.c: Report failed loading due to ELF class mismatch
with better words.
[BZ #162] [BZ #162]
* manual/llio.texi (Waiting for I/O): Correct description of read * manual/llio.texi (Waiting for I/O): Correct description of read
conditions reported by select. conditions reported by select.

35
elf/dl-load.c
View File

@ -1552,7 +1552,7 @@ print_search_path (struct r_search_path_elem **list,
user might want to know about this. */ user might want to know about this. */
static int static int
open_verify (const char *name, struct filebuf *fbp, struct link_map *loader, open_verify (const char *name, struct filebuf *fbp, struct link_map *loader,
int whatcode) int whatcode, bool *found_other_class)
{ {
/* This is the expected ELF header. */ /* This is the expected ELF header. */
#define ELF32_CLASS ELFCLASS32 #define ELF32_CLASS ELFCLASS32
@ -1656,10 +1656,13 @@ open_verify (const char *name, struct filebuf *fbp, struct link_map *loader,
) )
errstring = N_("invalid ELF header"); errstring = N_("invalid ELF header");
else if (ehdr->e_ident[EI_CLASS] != ELFW(CLASS)) else if (ehdr->e_ident[EI_CLASS] != ELFW(CLASS))
{
/* This is not a fatal error. On architectures where /* This is not a fatal error. On architectures where
32-bit and 64-bit binaries can be run this might 32-bit and 64-bit binaries can be run this might
happen. */ happen. */
*found_other_class = true;
goto close_and_out; goto close_and_out;
}
else if (ehdr->e_ident[EI_DATA] != byteorder) else if (ehdr->e_ident[EI_DATA] != byteorder)
{ {
if (BYTE_ORDER == BIG_ENDIAN) if (BYTE_ORDER == BIG_ENDIAN)
@ -1766,7 +1769,8 @@ open_verify (const char *name, struct filebuf *fbp, struct link_map *loader,
static int static int
open_path (const char *name, size_t namelen, int preloaded, open_path (const char *name, size_t namelen, int preloaded,
struct r_search_path_struct *sps, char **realname, struct r_search_path_struct *sps, char **realname,
struct filebuf *fbp, struct link_map *loader, int whatcode) struct filebuf *fbp, struct link_map *loader, int whatcode,
bool *found_other_class)
{ {
struct r_search_path_elem **dirs = sps->dirs; struct r_search_path_elem **dirs = sps->dirs;
char *buf; char *buf;
@ -1815,7 +1819,7 @@ open_path (const char *name, size_t namelen, int preloaded,
if (__builtin_expect (GLRO(dl_debug_mask) & DL_DEBUG_LIBS, 0)) if (__builtin_expect (GLRO(dl_debug_mask) & DL_DEBUG_LIBS, 0))
_dl_debug_printf (" trying file=%s\n", buf); _dl_debug_printf (" trying file=%s\n", buf);
fd = open_verify (buf, fbp, loader, whatcode); fd = open_verify (buf, fbp, loader, whatcode, found_other_class);
if (this_dir->status[cnt] == unknown) if (this_dir->status[cnt] == unknown)
{ {
if (fd != -1) if (fd != -1)
@ -1990,6 +1994,9 @@ _dl_map_object (struct link_map *loader, const char *name, int preloaded,
} }
#endif #endif
/* Will be true if we found a DSO which is of the other ELF class. */
bool found_other_class = false;
if (strchr (name, '/') == NULL) if (strchr (name, '/') == NULL)
{ {
/* Search for NAME in several places. */ /* Search for NAME in several places. */
@ -2010,7 +2017,8 @@ _dl_map_object (struct link_map *loader, const char *name, int preloaded,
for (l = loader; fd == -1 && l; l = l->l_loader) for (l = loader; fd == -1 && l; l = l->l_loader)
if (cache_rpath (l, &l->l_rpath_dirs, DT_RPATH, "RPATH")) if (cache_rpath (l, &l->l_rpath_dirs, DT_RPATH, "RPATH"))
fd = open_path (name, namelen, preloaded, &l->l_rpath_dirs, fd = open_path (name, namelen, preloaded, &l->l_rpath_dirs,
&realname, &fb, loader, LA_SER_RUNPATH); &realname, &fb, loader, LA_SER_RUNPATH,
&found_other_class);
/* If dynamically linked, try the DT_RPATH of the executable /* If dynamically linked, try the DT_RPATH of the executable
itself. NB: we do this for lookups in any namespace. */ itself. NB: we do this for lookups in any namespace. */
@ -2020,7 +2028,8 @@ _dl_map_object (struct link_map *loader, const char *name, int preloaded,
if (l && l->l_type != lt_loaded && l != loader if (l && l->l_type != lt_loaded && l != loader
&& cache_rpath (l, &l->l_rpath_dirs, DT_RPATH, "RPATH")) && cache_rpath (l, &l->l_rpath_dirs, DT_RPATH, "RPATH"))
fd = open_path (name, namelen, preloaded, &l->l_rpath_dirs, fd = open_path (name, namelen, preloaded, &l->l_rpath_dirs,
&realname, &fb, loader ?: l, LA_SER_RUNPATH); &realname, &fb, loader ?: l, LA_SER_RUNPATH,
&found_other_class);
} }
} }
@ -2029,7 +2038,7 @@ _dl_map_object (struct link_map *loader, const char *name, int preloaded,
fd = open_path (name, namelen, preloaded, &env_path_list, fd = open_path (name, namelen, preloaded, &env_path_list,
&realname, &fb, &realname, &fb,
loader ?: GL(dl_ns)[LM_ID_BASE]._ns_loaded, loader ?: GL(dl_ns)[LM_ID_BASE]._ns_loaded,
LA_SER_LIBPATH); LA_SER_LIBPATH, &found_other_class);
/* Look at the RUNPATH information for this binary. */ /* Look at the RUNPATH information for this binary. */
if (fd == -1 && loader != NULL if (fd == -1 && loader != NULL
@ -2037,7 +2046,7 @@ _dl_map_object (struct link_map *loader, const char *name, int preloaded,
DT_RUNPATH, "RUNPATH")) DT_RUNPATH, "RUNPATH"))
fd = open_path (name, namelen, preloaded, fd = open_path (name, namelen, preloaded,
&loader->l_runpath_dirs, &realname, &fb, loader, &loader->l_runpath_dirs, &realname, &fb, loader,
LA_SER_RUNPATH); LA_SER_RUNPATH, &found_other_class);
if (fd == -1 if (fd == -1
&& (__builtin_expect (! preloaded, 1) && (__builtin_expect (! preloaded, 1)
@ -2087,7 +2096,7 @@ _dl_map_object (struct link_map *loader, const char *name, int preloaded,
{ {
fd = open_verify (cached, fd = open_verify (cached,
&fb, loader ?: GL(dl_ns)[nsid]._ns_loaded, &fb, loader ?: GL(dl_ns)[nsid]._ns_loaded,
LA_SER_CONFIG); LA_SER_CONFIG, &found_other_class);
if (__builtin_expect (fd != -1, 1)) if (__builtin_expect (fd != -1, 1))
{ {
realname = local_strdup (cached); realname = local_strdup (cached);
@ -2107,7 +2116,7 @@ _dl_map_object (struct link_map *loader, const char *name, int preloaded,
|| __builtin_expect (!(l->l_flags_1 & DF_1_NODEFLIB), 1)) || __builtin_expect (!(l->l_flags_1 & DF_1_NODEFLIB), 1))
&& rtld_search_dirs.dirs != (void *) -1) && rtld_search_dirs.dirs != (void *) -1)
fd = open_path (name, namelen, preloaded, &rtld_search_dirs, fd = open_path (name, namelen, preloaded, &rtld_search_dirs,
&realname, &fb, l, LA_SER_DEFAULT); &realname, &fb, l, LA_SER_DEFAULT, &found_other_class);
/* Add another newline when we are tracing the library loading. */ /* Add another newline when we are tracing the library loading. */
if (__builtin_expect (GLRO(dl_debug_mask) & DL_DEBUG_LIBS, 0)) if (__builtin_expect (GLRO(dl_debug_mask) & DL_DEBUG_LIBS, 0))
@ -2124,7 +2133,8 @@ _dl_map_object (struct link_map *loader, const char *name, int preloaded,
else else
{ {
fd = open_verify (realname, &fb, fd = open_verify (realname, &fb,
loader ?: GL(dl_ns)[nsid]._ns_loaded, 0); loader ?: GL(dl_ns)[nsid]._ns_loaded, 0,
&found_other_class);
if (__builtin_expect (fd, 0) == -1) if (__builtin_expect (fd, 0) == -1)
free (realname); free (realname);
} }
@ -2167,6 +2177,11 @@ _dl_map_object (struct link_map *loader, const char *name, int preloaded,
return l; return l;
} }
else if (found_other_class)
_dl_signal_error (0, name, NULL,
ELFW(CLASS) == ELFCLASS32
? N_("wrong ELF class: ELFCLASS64")
: N_("wrong ELF class: ELFCLASS32"));
else else
_dl_signal_error (errno, name, NULL, _dl_signal_error (errno, name, NULL,
N_("cannot open shared object file")); N_("cannot open shared object file"));