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Update.

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* elf/dl-load.c (_dl_map_object_from_fd): Prevent dynamically
	loading modules with the DF_STATIC_TLS flag set.
	* elf/dynamic-link.h (elf_get_dynamic_info): Initialize l_flags
	element.
	* include/link.h (struct link_map): Add l_flags field.
	* elf/elf.h (DF_STATIC_TLS): New definition.
This commit is contained in:
Ulrich Drepper 2002-02-06 00:55:46 +00:00
parent 472d82fc06
commit ec70c01155
5 changed files with 18 additions and 5 deletions
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7
ChangeLog
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@ -1,5 +1,12 @@
2002-02-05 Ulrich Drepper <drepper@redhat.com>
* elf/dl-load.c (_dl_map_object_from_fd): Prevent dynamically
loading modules with the DF_STATIC_TLS flag set.
* elf/dynamic-link.h (elf_get_dynamic_info): Initialize l_flags
element.
* include/link.h (struct link_map): Add l_flags field.
* elf/elf.h (DF_STATIC_TLS): New definition.
* dlfcn/Makefile: Add rules to build and run bug-dlopen1.
* dlfcn/bug-dlopen1.c: New file. By Bruno Haible.

6
elf/dl-load.c
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@ -1170,7 +1170,11 @@ _dl_map_object_from_fd (const char *name, int fd, struct filebuf *fbp,
/* Make sure we are dlopen()ing an object which has the DF_1_NOOPEN
flag set. */
if (__builtin_expect (l->l_flags_1 & DF_1_NOOPEN, 0)
if ((__builtin_expect (l->l_flags_1 & DF_1_NOOPEN, 0)
#ifdef USE_TLS
|| __builtin_expect (l->l_flags & DF_STATIC_TLS, 0)
#endif
)
&& (mode & __RTLD_DLOPEN))
{
/* We are not supposed to load this object. Free all resources. */

8
elf/dynamic-link.h
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@ -117,12 +117,12 @@ elf_get_dynamic_info (struct link_map *l)
/* Flags are used. Translate to the old form where available.
Since these l_info entries are only tested for NULL pointers it
is ok if they point to the DT_FLAGS entry. */
ElfW(Word) flags = info[DT_FLAGS]->d_un.d_val;
if (flags & DF_SYMBOLIC)
l->l_flags = info[DT_FLAGS]->d_un.d_val;
if l->l_(flags & DF_SYMBOLIC)
info[DT_SYMBOLIC] = info[DT_FLAGS];
if (flags & DF_TEXTREL)
if l->l_(flags & DF_TEXTREL)
info[DT_TEXTREL] = info[DT_FLAGS];
if (flags & DF_BIND_NOW)
if (l->l_flags & DF_BIND_NOW)
info[DT_BIND_NOW] = info[DT_FLAGS];
}
#endif

1
elf/elf.h
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@ -730,6 +730,7 @@ typedef struct
#define DF_SYMBOLIC 0x00000002 /* Symbol resolutions starts here */
#define DF_TEXTREL 0x00000004 /* Object contains text relocations */
#define DF_BIND_NOW 0x00000008 /* No lazy binding for this object */
#define DF_STATIC_TLS 0x00000010 /* Module uses the static TLS model */
/* State flags selectable in the `d_un.d_val' element of the DT_FLAGS_1
entry in the dynamic section. */

1
include/link.h
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@ -237,6 +237,7 @@ struct link_map
/* Various flag words. */
ElfW(Word) l_feature_1;
ElfW(Word) l_flags_1;
ElfW(Word) l_flags;
/* Temporarily used in `dl_close'. */
unsigned int l_idx;