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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.
112 lines
2.5 KiB
C
112 lines
2.5 KiB
C
#include <dlfcn.h>
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#include <mcheck.h>
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#include <stdio.h>
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#include <stdlib.h>
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int
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main (void)
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{
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void *h1;
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void *h2;
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int (*fp) (void);
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int *vp;
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mtrace ();
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/* Open the two objects. */
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h1 = dlopen ("reldepmod1.so", RTLD_LAZY | RTLD_GLOBAL);
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if (h1 == NULL)
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{
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printf ("cannot open reldepmod1.so: %s\n", dlerror ());
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exit (1);
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}
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h2 = dlopen ("reldepmod2.so", RTLD_LAZY);
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if (h2 == NULL)
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{
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printf ("cannot open reldepmod2.so: %s\n", dlerror ());
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exit (1);
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}
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/* Get the address of the variable in reldepmod1.so. */
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vp = dlsym (h1, "some_var");
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if (vp == NULL)
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{
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printf ("cannot get address of \"some_var\": %s\n", dlerror ());
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exit (1);
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}
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*vp = 42;
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/* Get the function `call_me' in the second object. This has a
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dependency which is resolved by a definition in reldepmod1.so. */
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fp = dlsym (h2, "call_me");
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if (fp == NULL)
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{
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printf ("cannot get address of \"call_me\": %s\n", dlerror ());
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exit (1);
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}
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/* Call the function. */
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if (fp () != 0)
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{
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puts ("function \"call_me\" returned wrong result");
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exit (1);
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}
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/* Now close the first object. If must still be around since we have
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a implicit dependency. */
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if (dlclose (h1) != 0)
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{
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printf ("closing h1 failed: %s\n", dlerror ());
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exit (1);
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}
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/* Try calling the function again. This will fail if the first object
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got unloaded. */
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if (fp () != 0)
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{
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puts ("second call of function \"call_me\" returned wrong result");
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exit (1);
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}
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/* Now close the second file as well. */
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if (dlclose (h2) != 0)
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{
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printf ("closing h2 failed: %s\n", dlerror ());
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exit (1);
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}
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/* Finally, open the first object again. */
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h1 = dlopen ("reldepmod1.so", RTLD_LAZY | RTLD_GLOBAL);
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if (h1 == NULL)
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{
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printf ("cannot open reldepmod1.so the second time: %s\n", dlerror ());
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exit (1);
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}
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/* And get the variable address again. */
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vp = dlsym (h1, "some_var");
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if (vp == NULL)
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{
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printf ("cannot get address of \"some_var\" the second time: %s\n",
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dlerror ());
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exit (1);
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}
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/* The variable now must have its originial value. */
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if (*vp != 0)
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{
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puts ("variable \"some_var\" not reset");
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exit (1);
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}
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/* Close the first object again, we are done. */
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if (dlclose (h1) != 0)
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{
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printf ("closing h1 failed: %s\n", dlerror ());
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exit (1);
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}
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return 0;
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}
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