aboutsummaryrefslogtreecommitdiff
path: root/elf/reldep.c
diff options
context:
space:
mode:
authorUlrich Drepper <drepper@redhat.com>2000-08-26 23:41:19 +0000
committerUlrich Drepper <drepper@redhat.com>2000-08-26 23:41:19 +0000
commit2b7238dda8a0675577701d59f655029c55c60bfe (patch)
tree1c3bd9a230657021690ce38bfff4bbb42164f209 /elf/reldep.c
parent36466e64f0f8cbf1a915070f3f071b9360926cae (diff)
downloadglibc-2b7238dda8a0675577701d59f655029c55c60bfe.zip
glibc-2b7238dda8a0675577701d59f655029c55c60bfe.tar.gz
glibc-2b7238dda8a0675577701d59f655029c55c60bfe.tar.bz2
Update.
2000-08-26 Ulrich Drepper <drepper@redhat.com> * elf/Makefile (distribute): Add unloadmod.c, reldepmod1.c, reldepmod2.c, reldepmod3.c, and reldepmod4.c. (tests): Add unload, reldep, reldep2, and reldep3. (modules-names): Add unloadmod, reldepmod1, reldepmod2, reldepmod3, and reldepmod4. Add rules to build and run unload, reldep, reldep2, and reldep3. * elf/dl-lookup.c (_dl_lookup_symbol): Add new parameter explicit. Don't create relocation dependency if it is nonzero. (_dl_lookup_symbol_skip): Remove relocation dependency stuff. This can never happen here. (_dl_lookup_versioned_symbol): Add new parameter explicit. Don't create relocation dependency if it is nonzero. (_dl_lookup_versioned_symbol_skip): Remove relocation dependency stuff. This can never happen here. * sysdeps/generic/ldsodefs.h: Change prototypes. * elf/dl-reloc.c (RESOLVE_MAP): Pass 0 in explicit parameter to _dl_lookup_up and _dl_lookup_versioned_symbol. (RESOLV): Likewise. * elf/dl-runtime.c (fixup): Likewise. (profile_fixup): Likewise. * elf/dl-libc.c (do_dlsym): Pass 1 in explicit parameter to _dl_lookup_symbol. * elf/dl-symbol.c (_dl_symbol_value): Likewise. * elf/rtld.c (dl_main): Likewise. * elf/dl-sym.c (_dl_sym): Pass 1 in explicit parameter to _dl_lookup_symbol if handle is not RTLD_DEFAULT. Always compute and pass down the caller map. (_dl_vsym): Likewise. * elf/reldep.c: New file. * elf/reldep2.c: New file. * elf/reldep3.c: New file. * elf/reldepmod1.c: New file. * elf/reldepmod2.c: New file. * elf/reldepmod3.c: New file. * elf/reldepmod4.c: New file. * elf/unload.c: New file. * elf/unloadmod.c: New file. * elf/do-lookup.h: Remove unused undef_name parameter. * elf/dl-lookup.c: Adjust callers.
Diffstat (limited to 'elf/reldep.c')
-rw-r--r--elf/reldep.c111
1 files changed, 111 insertions, 0 deletions
diff --git a/elf/reldep.c b/elf/reldep.c
new file mode 100644
index 0000000..44b239b
--- /dev/null
+++ b/elf/reldep.c
@@ -0,0 +1,111 @@
+#include <dlfcn.h>
+#include <mcheck.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+int
+main (void)
+{
+ void *h1;
+ void *h2;
+ int (*fp) (void);
+ int *vp;
+
+ mtrace ();
+
+ /* Open the two objects. */
+ h1 = dlopen ("reldepmod1.so", RTLD_LAZY | RTLD_GLOBAL);
+ if (h1 == NULL)
+ {
+ printf ("cannot open reldepmod1.so: %s\n", dlerror ());
+ exit (1);
+ }
+ h2 = dlopen ("reldepmod2.so", RTLD_LAZY);
+ if (h2 == NULL)
+ {
+ printf ("cannot open reldepmod2.so: %s\n", dlerror ());
+ exit (1);
+ }
+
+ /* Get the address of the variable in reldepmod1.so. */
+ vp = dlsym (h1, "some_var");
+ if (vp == NULL)
+ {
+ printf ("cannot get address of \"some_var\": %s\n", dlerror ());
+ exit (1);
+ }
+
+ *vp = 42;
+
+ /* Get the function `call_me' in the second object. This has a
+ dependency which is resolved by a definition in reldepmod1.so. */
+ fp = dlsym (h2, "call_me");
+ if (fp == NULL)
+ {
+ printf ("cannot get address of \"call_me\": %s\n", dlerror ());
+ exit (1);
+ }
+
+ /* Call the function. */
+ if (fp () != 0)
+ {
+ puts ("function \"call_me\" returned wrong result");
+ exit (1);
+ }
+
+ /* Now close the first object. If must still be around since we have
+ a implicit dependency. */
+ if (dlclose (h1) != 0)
+ {
+ printf ("closing h1 failed: %s\n", dlerror ());
+ exit (1);
+ }
+
+ /* Try calling the function again. This will fail if the first object
+ got unloaded. */
+ if (fp () != 0)
+ {
+ puts ("second call of function \"call_me\" returned wrong result");
+ exit (1);
+ }
+
+ /* Now close the second file as well. */
+ if (dlclose (h2) != 0)
+ {
+ printf ("closing h2 failed: %s\n", dlerror ());
+ exit (1);
+ }
+
+ /* Finally, open the first object again. */
+ h1 = dlopen ("reldepmod1.so", RTLD_LAZY | RTLD_GLOBAL);
+ if (h1 == NULL)
+ {
+ printf ("cannot open reldepmod1.so the second time: %s\n", dlerror ());
+ exit (1);
+ }
+
+ /* And get the variable address again. */
+ vp = dlsym (h1, "some_var");
+ if (vp == NULL)
+ {
+ printf ("cannot get address of \"some_var\" the second time: %s\n",
+ dlerror ());
+ exit (1);
+ }
+
+ /* The variable now must have its originial value. */
+ if (*vp != 0)
+ {
+ puts ("variable \"some_var\" not reset");
+ exit (1);
+ }
+
+ /* Close the first object again, we are done. */
+ if (dlclose (h1) != 0)
+ {
+ printf ("closing h1 failed: %s\n", dlerror ());
+ exit (1);
+ }
+
+ return 0;
+}