diff options
Diffstat (limited to 'dlfcn/modstatic2.c')
| -rw-r--r-- | dlfcn/modstatic2.c | 228 |
1 files changed, 228 insertions, 0 deletions
diff --git a/dlfcn/modstatic2.c b/dlfcn/modstatic2.c new file mode 100644 index 0000000..0703de8 --- /dev/null +++ b/dlfcn/modstatic2.c @@ -0,0 +1,228 @@ +#include <dlfcn.h> +#include <link.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <gnu/lib-names.h> + +int test (FILE *out, int a); + +int +test (FILE *out, int a) +{ + fputs ("in modstatic2.c (test)\n", out); + + void *handle = dlopen ("modstatic2-nonexistent.so", RTLD_LAZY); + if (handle == NULL) + fprintf (out, "nonexistent: %s\n", dlerror ()); + else + exit (1); + + handle = dlopen ("modstatic2.so", RTLD_LAZY); + if (handle == NULL) + { + fprintf (out, "%s\n", dlerror ()); + exit (1); + } + + int (*test2) (FILE *, int); + test2 = dlsym (handle, "test"); + if (test2 == NULL) + { + fprintf (out, "%s\n", dlerror ()); + exit (1); + } + if (test2 != test) + { + fprintf (out, "test %p != test2 %p\n", test, test2); + exit (1); + } + + Dl_info info; + int res = dladdr (test2, &info); + if (res == 0) + { + fputs ("dladdr returned 0\n", out); + exit (1); + } + else + { + if (strstr (info.dli_fname, "modstatic2.so") == NULL + || strcmp (info.dli_sname, "test") != 0) + { + fprintf (out, "fname %s sname %s\n", info.dli_fname, info.dli_sname); + exit (1); + } + if (info.dli_saddr != (void *) test2) + { + fprintf (out, "saddr %p != test %p\n", info.dli_saddr, test2); + exit (1); + } + } + + ElfW(Sym) *sym; + void *symp; + res = dladdr1 (test2, &info, &symp, RTLD_DL_SYMENT); + if (res == 0) + { + fputs ("dladdr1 returned 0\n", out); + exit (1); + } + else + { + if (strstr (info.dli_fname, "modstatic2.so") == NULL + || strcmp (info.dli_sname, "test") != 0) + { + fprintf (out, "fname %s sname %s\n", info.dli_fname, info.dli_sname); + exit (1); + } + if (info.dli_saddr != (void *) test2) + { + fprintf (out, "saddr %p != test %p\n", info.dli_saddr, test2); + exit (1); + } + sym = symp; + if (sym == NULL) + { + fputs ("sym == NULL\n", out); + exit (1); + } + if (ELF32_ST_BIND (sym->st_info) != STB_GLOBAL + || ELF32_ST_VISIBILITY (sym->st_other) != STV_DEFAULT) + { + fprintf (out, "bind %d visibility %d\n", + (int) ELF32_ST_BIND (sym->st_info), + (int) ELF32_ST_VISIBILITY (sym->st_other)); + exit (1); + } + } + + Lmid_t lmid; + res = dlinfo (handle, RTLD_DI_LMID, &lmid); + if (res != 0) + { + fprintf (out, "dlinfo returned %d %s\n", res, dlerror ()); + exit (1); + } + else if (lmid != LM_ID_BASE) + { + fprintf (out, "lmid %d != %d\n", (int) lmid, (int) LM_ID_BASE); + exit (1); + } + + void *handle2 = dlopen (LIBDL_SO, RTLD_LAZY); + if (handle2 == NULL) + { + fprintf (out, "libdl.so: %s\n", dlerror ()); + exit (1); + } + +#ifdef DO_VERSIONING + if (dlvsym (handle2, "_dlfcn_hook", "GLIBC_PRIVATE") == NULL) + { + fprintf (out, "dlvsym: %s\n", dlerror ()); + exit (1); + } +#endif + + void *(*dlsymfn) (void *, const char *); + dlsymfn = dlsym (handle2, "dlsym"); + if (dlsymfn == NULL) + { + fprintf (out, "dlsym \"dlsym\": %s\n", dlerror ()); + exit (1); + } + void *test3 = dlsymfn (handle, "test"); + if (test3 == NULL) + { + fprintf (out, "%s\n", dlerror ()); + exit (1); + } + else if (test3 != (void *) test2) + { + fprintf (out, "test2 %p != test3 %p\n", test2, test3); + exit (1); + } + + dlclose (handle2); + dlclose (handle); + + handle = dlmopen (LM_ID_BASE, "modstatic2.so", RTLD_LAZY); + if (handle == NULL) + { + fprintf (out, "%s\n", dlerror ()); + exit (1); + } + dlclose (handle); + + handle = dlmopen (LM_ID_NEWLM, "modstatic2.so", RTLD_LAZY); + if (handle == NULL) + fprintf (out, "LM_ID_NEWLM: %s\n", dlerror ()); + else + { + fputs ("LM_ID_NEWLM unexpectedly succeeded\n", out); + exit (1); + } + + handle = dlopen ("modstatic.so", RTLD_LAZY); + if (handle == NULL) + { + fprintf (out, "%s\n", dlerror ()); + exit (1); + } + + int (*test4) (int); + test4 = dlsym (handle, "test"); + if (test4 == NULL) + { + fprintf (out, "%s\n", dlerror ()); + exit (1); + } + + res = test4 (16); + if (res != 16 + 16) + { + fprintf (out, "modstatic.so (test) returned %d\n", res); + exit (1); + } + + res = dladdr1 (test4, &info, &symp, RTLD_DL_SYMENT); + if (res == 0) + { + fputs ("dladdr1 returned 0\n", out); + exit (1); + } + else + { + if (strstr (info.dli_fname, "modstatic.so") == NULL + || strcmp (info.dli_sname, "test") != 0) + { + fprintf (out, "fname %s sname %s\n", info.dli_fname, info.dli_sname); + exit (1); + } + if (info.dli_saddr != (void *) test4) + { + fprintf (out, "saddr %p != test %p\n", info.dli_saddr, test4); + exit (1); + } + sym = symp; + if (sym == NULL) + { + fputs ("sym == NULL\n", out); + exit (1); + } + if (ELF32_ST_BIND (sym->st_info) != STB_GLOBAL + || ELF32_ST_VISIBILITY (sym->st_other) != STV_DEFAULT) + { + fprintf (out, "bind %d visibility %d\n", + (int) ELF32_ST_BIND (sym->st_info), + (int) ELF32_ST_VISIBILITY (sym->st_other)); + exit (1); + } + } + + dlclose (handle); + + fputs ("leaving modstatic2.c (test)\n", out); + return a + a; +} |