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authorUlrich Drepper <drepper@redhat.com>2005-01-06 22:40:27 +0000
committerUlrich Drepper <drepper@redhat.com>2005-01-06 22:40:27 +0000
commit9dcafc559763e339d4a79580c333127033e39c11 (patch)
tree342441fed429693bc69d95addc588e10a7d021c4 /elf/dl-sym.c
parentf14038f2e295e7994e2317127cdea1cb26db6be1 (diff)
downloadglibc-9dcafc559763e339d4a79580c333127033e39c11.tar.gz
* csu/elf-init.c (__libc_csu_fini): Don't do anything here.
* sysdeps/generic/libc-start.c: Don't register program destructor here. * dlfcn/Makefile: Add rules to build dlfcn.c. (LDFLAGS-dl.so): Removed. * dlfcn/dlclose.c: _dl_close is now in ld.so, use function pointer table. * dlfcn/dlmopen.c: Likewise for _dl_open. * dlfcn/dlopen.c: Likewise. * dlfcn/dlopenold.c: Likewise. * elf/dl-libc.c: Likewise for _dl_open and _dl_close. * elf/Makefile (routines): Remove dl-open and dl-close. (dl-routines): Add dl-open, dl-close, and dl-trampoline. Add rules to build and run tst-audit1. * elf/tst-audit1.c: New file. * elf/tst-auditmod1.c: New file. * elf/Versions [libc]: Remove _dl_open and _dl_close. * elf/dl-close.c: Change for use inside ld.so instead of libc.so. * elf/dl-open.c: Likewise. * elf/dl-debug.c (_dl_debug_initialize): Allow reinitialization, signaled by nonzero parameter. * elf/dl-init.c: Fix use of r_state. * elf/dl-load.c: Likewise. * elf/dl-close.c: Add auditing checkpoints. * elf/dl-open.c: Likewise. * elf/dl-fini.c: Likewise. * elf/dl-load.c: Likewise. * elf/dl-sym.c: Likewise. * sysdeps/generic/libc-start.c: Likewise. * elf/dl-object.c: Allocate memory for auditing information. * elf/dl-reloc.c: Remove RESOLV. We now always need the map. Correctly initialize slotinfo. * elf/dynamic-link.h: Adjust after removal of RESOLV. * sysdeps/hppa/dl-lookupcfg.h: Likewise. * sysdeps/ia64/dl-lookupcfg.h: Likewise. * sysdeps/powerpc/powerpc64/dl-lookupcfg.h: Removed. * elf/dl-runtime.c (_dl_fixup): Little cleanup. (_dl_profile_fixup): New parameters to point to register struct and variable for frame size. Add auditing checkpoints. (_dl_call_pltexit): New function. Don't define trampoline code here. * elf/rtld.c: Recognize LD_AUDIT. Load modules on startup. Remove all the functions from _rtld_global_ro which only _dl_open and _dl_close needed. Add auditing checkpoints. * elf/link.h: Define symbols for auditing interfaces. * include/link.h: Likewise. * include/dlfcn.h: Define __RTLD_AUDIT. Remove prototypes for _dl_open and _dl_close. Adjust access to argc and argv in libdl. * dlfcn/dlfcn.c: New file. * sysdeps/generic/dl-lookupcfg.h: Remove all content now that RESOLVE is gone. * sysdeps/generic/ldsodefs.h: Add definitions for auditing interfaces. * sysdeps/generic/unsecvars.h: Add LD_AUDIT. * sysdeps/i386/dl-machine.h: Remove trampoline code here. Adjust for removal of RESOLVE. * sysdeps/x86_64/dl-machine.h: Likewise. * sysdeps/generic/dl-trampoline.c: New file. * sysdeps/i386/dl-trampoline.c: New file. * sysdeps/x86_64/dl-trampoline.c: New file. * sysdeps/generic/dl-tls.c: Cleanups. Fixup for dtv_t change. Fix updating of DTV. * sysdeps/generic/libc-tls.c: Likewise. * sysdeps/arm/bits/link.h: Renamed to ... * sysdeps/arm/buts/linkmap.h: ...this. * sysdeps/generic/bits/link.h: Renamed to... * sysdeps/generic/bits/linkmap.h: ...this. * sysdeps/hppa/bits/link.h: Renamed to... * sysdeps/hppa/bits/linkmap.h: ...this. * sysdeps/hppa/i386/link.h: Renamed to... * sysdeps/hppa/i386/linkmap.h: ...this. * sysdeps/hppa/ia64/link.h: Renamed to... * sysdeps/hppa/ia64/linkmap.h: ...this. * sysdeps/hppa/s390/link.h: Renamed to... * sysdeps/hppa/s390/linkmap.h: ...this. * sysdeps/hppa/sh/link.h: Renamed to... * sysdeps/hppa/sh/linkmap.h: ...this. * sysdeps/hppa/x86_64/link.h: Renamed to... * sysdeps/hppa/x86_64/linkmap.h: ...this. 2005-01-06 Ulrich Drepper <drepper@redhat.com> * allocatestack.c (init_one_static_tls): Adjust initialization of DTV entry for static tls deallocation fix. * sysdeps/alpha/tls.h (dtv_t): Change pointer type to be struct which also contains information whether the memory pointed to is static TLS or not. * sysdeps/i386/tls.h: Likewise. * sysdeps/ia64/tls.h: Likewise. * sysdeps/powerpc/tls.h: Likewise. * sysdeps/s390/tls.h: Likewise. * sysdeps/sh/tls.h: Likewise. * sysdeps/sparc/tls.h: Likewise. * sysdeps/x86_64/tls.h: Likewise.
Diffstat (limited to 'elf/dl-sym.c')
-rw-r--r--elf/dl-sym.c59
1 files changed, 57 insertions, 2 deletions
diff --git a/elf/dl-sym.c b/elf/dl-sym.c
index ba00ef56f4..ca83daf21d 100644
--- a/elf/dl-sym.c
+++ b/elf/dl-sym.c
@@ -116,14 +116,69 @@ RTLD_NEXT used in code not dynamically loaded"));
if (ref != NULL)
{
+ void *value;
+
#if defined USE_TLS && defined SHARED
if (ELFW(ST_TYPE) (ref->st_info) == STT_TLS)
/* The found symbol is a thread-local storage variable.
Return the address for to the current thread. */
- return _dl_tls_symaddr (result, ref);
+ value = _dl_tls_symaddr (result, ref);
+ else
+#endif
+ value = DL_SYMBOL_ADDRESS (result, ref);
+
+#ifdef SHARED
+ /* Auditing checkpoint: we have a new binding. Provide the
+ auditing libraries the possibility to change the value and
+ tell us whether further auditing is wanted. */
+ if (__builtin_expect (GLRO(dl_naudit) > 0, 0))
+ {
+ const char *strtab = (const char *) D_PTR (result,
+ l_info[DT_STRTAB]);
+ /* Compute index of the symbol entry in the symbol table of
+ the DSO with the definition. */
+ unsigned int ndx = (ref - (ElfW(Sym) *) D_PTR (result,
+ l_info[DT_SYMTAB]));
+
+ if ((match->l_audit_any_plt | result->l_audit_any_plt) != 0)
+ {
+ unsigned int altvalue = 0;
+ struct audit_ifaces *afct = GLRO(dl_audit);
+ /* Synthesize a symbol record where the st_value field is
+ the result. */
+ ElfW(Sym) sym = *ref;
+ sym.st_value = (ElfW(Addr)) value;
+
+ for (unsigned int cnt = 0; cnt < GLRO(dl_naudit); ++cnt)
+ {
+ if (afct->symbind != NULL
+ && ((match->l_audit[cnt].bindflags & LA_FLG_BINDFROM)
+ != 0
+ || ((result->l_audit[cnt].bindflags & LA_FLG_BINDTO)
+ != 0)))
+ {
+ unsigned int flags = altvalue | LA_SYMB_DLSYM;
+ uintptr_t new_value
+ = afct->symbind (&sym, ndx,
+ &match->l_audit[cnt].cookie,
+ &result->l_audit[cnt].cookie,
+ &flags, strtab + ref->st_name);
+ if (new_value != (uintptr_t) sym.st_value)
+ {
+ altvalue = LA_SYMB_ALTVALUE;
+ sym.st_value = new_value;
+ }
+ }
+
+ afct = afct->next;
+ }
+
+ value = (void *) sym.st_value;
+ }
+ }
#endif
- return DL_SYMBOL_ADDRESS (result, ref);
+ return value;
}
return NULL;