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* dlfcn/Makefile (tests): Add tst-dlinfo. ($(objpfx)tst-dlinfo): New target. * dlfcn/dlinfo.c: New file. * dlfcn/Makefile (libdl-routines): Add it. * dlfcn/Versions (libdl: GLIBC_2.3.3): Add dlinfo. * dlfcn/dlfcn.h [__USE_GNU]: Declare dlinfo. [__USE_GNU] (RTLD_DI_*): New enum constants. [__USE_GNU] (Dl_serpath, Dl_serinfo): New types. * elf/dl-load.c (cache_rpath): New inline function. (_dl_map_object): Use it. (_dl_rtld_di_serinfo): New function. * sysdeps/generic/ldsodefs.h: Declare it. * elf/Versions (ld: GLIBC_PRIVATE): Add it.
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Roland McGrath
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Mar 15, 2003
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@@ -6,6 +6,6 @@ libdl { | |
dlopen; dlvsym; | ||
} | ||
GLIBC_2.3.3 { | ||
dladdr1; | ||
dladdr1; dlinfo; | ||
} | ||
} |
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@@ -0,0 +1,87 @@ | ||
/* dlinfo -- Get information from the dynamic linker. | ||
Copyright (C) 2003 Free Software Foundation, Inc. | ||
This file is part of the GNU C Library. | ||
The GNU C Library is free software; you can redistribute it and/or | ||
modify it under the terms of the GNU Lesser General Public | ||
License as published by the Free Software Foundation; either | ||
version 2.1 of the License, or (at your option) any later version. | ||
The GNU C Library is distributed in the hope that it will be useful, | ||
but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | ||
Lesser General Public License for more details. | ||
You should have received a copy of the GNU Lesser General Public | ||
License along with the GNU C Library; if not, write to the Free | ||
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA | ||
02111-1307 USA. */ | ||
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#include <dlfcn.h> | ||
#include <link.h> | ||
#include <ldsodefs.h> | ||
#include <libintl.h> | ||
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struct dlinfo_args | ||
{ | ||
ElfW(Addr) caller; | ||
void *handle; | ||
int request; | ||
void *arg; | ||
}; | ||
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static void | ||
dlinfo_doit (void *argsblock) | ||
{ | ||
struct dlinfo_args *const args = argsblock; | ||
struct link_map *l = args->handle; | ||
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#if 0 | ||
if (args->handle == RTLD_SELF) | ||
{ | ||
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/* Find the highest-addressed object that CALLER is not below. */ | ||
for (l = GL(dl_loaded); l != NULL; l = l->l_next) | ||
if (caller >= l->l_map_start && caller < l->l_map_end) | ||
/* There must be exactly one DSO for the range of the virtual | ||
memory. Otherwise something is really broken. */ | ||
break; | ||
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if (l == NULL) | ||
_dl_signal_error (0, NULL, NULL, N_("\ | ||
RTLD_SELF used in code not dynamically loaded")); | ||
} | ||
#endif | ||
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switch (args->request) | ||
{ | ||
case RTLD_DI_LMID: | ||
case RTLD_DI_CONFIGADDR: | ||
default: | ||
_dl_signal_error (0, NULL, NULL, N_("unsupported dlinfo request")); | ||
break; | ||
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case RTLD_DI_LINKMAP: | ||
*(struct link_map **) args->arg = l; | ||
break; | ||
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case RTLD_DI_SERINFO: | ||
_dl_rtld_di_serinfo (l, args->arg, false); | ||
break; | ||
case RTLD_DI_SERINFOSIZE: | ||
_dl_rtld_di_serinfo (l, args->arg, true); | ||
break; | ||
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case RTLD_DI_ORIGIN: | ||
strcpy (args->arg, l->l_origin); | ||
break; | ||
} | ||
} | ||
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int | ||
dlinfo (void *handle, int request, void *arg) | ||
{ | ||
struct dlinfo_args args = { (ElfW(Addr)) RETURN_ADDRESS (0), | ||
handle, request, arg }; | ||
return _dlerror_run (&dlinfo_doit, &args) ? -1 : 0; | ||
} |
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@@ -0,0 +1,96 @@ | ||
/* Test for dlinfo. | ||
Copyright (C) 2003 Free Software Foundation, Inc. | ||
This file is part of the GNU C Library. | ||
The GNU C Library is free software; you can redistribute it and/or | ||
modify it under the terms of the GNU Lesser General Public | ||
License as published by the Free Software Foundation; either | ||
version 2.1 of the License, or (at your option) any later version. | ||
The GNU C Library is distributed in the hope that it will be useful, | ||
but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | ||
Lesser General Public License for more details. | ||
You should have received a copy of the GNU Lesser General Public | ||
License along with the GNU C Library; if not, write to the Free | ||
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA | ||
02111-1307 USA. */ | ||
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#include <dlfcn.h> | ||
#include <stdio.h> | ||
#include <stdlib.h> | ||
#include <error.h> | ||
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#define TEST_FUNCTION do_test () | ||
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static int | ||
do_test (void) | ||
{ | ||
int status = 0; | ||
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void *handle = dlopen ("glreflib1.so", RTLD_NOW); | ||
if (handle == NULL) | ||
error (EXIT_FAILURE, 0, "cannot load: glreflib1.so: %s", dlerror ()); | ||
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#define TRY(req, arg) \ | ||
if (dlinfo (handle, req, arg) != 0) \ | ||
{ \ | ||
printf ("dlinfo failed for %s: %s\n", #req, dlerror ()); \ | ||
status = 1; \ | ||
} \ | ||
else | ||
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struct link_map *l; | ||
TRY (RTLD_DI_LINKMAP, &l) | ||
{ | ||
if (l != handle) | ||
{ | ||
printf ("bogus link_map? %p != %p\n", l, handle); | ||
status = 1; | ||
} | ||
} | ||
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char origin[8192]; /* >= PATH_MAX, in theory */ | ||
TRY (RTLD_DI_ORIGIN, origin) | ||
{ | ||
printf ("origin: %s\n", origin); | ||
} | ||
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Dl_serinfo counts; | ||
TRY (RTLD_DI_SERINFOSIZE, &counts) | ||
{ | ||
Dl_serinfo *buf = alloca (counts.dls_size); | ||
buf->dls_cnt = counts.dls_cnt; | ||
buf->dls_size = counts.dls_size; | ||
printf ("%u library directories\n", buf->dls_cnt); | ||
TRY (RTLD_DI_SERINFO, buf) | ||
{ | ||
if (counts.dls_cnt != buf->dls_cnt) | ||
{ | ||
printf ("??? became %u library directories\n", buf->dls_cnt); | ||
status = 1; | ||
} | ||
for (unsigned int i = 0; i < buf->dls_cnt; ++i) | ||
printf ("\t%#02x\t%s\n", | ||
buf->dls_serpath[i].dls_flags, | ||
buf->dls_serpath[i].dls_name); | ||
} | ||
} | ||
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unsigned long int lmid = 0xdeadbeefUL; | ||
if (dlinfo (handle, RTLD_DI_LMID, &lmid) != 0) | ||
printf ("dlinfo refuses RTLD_DI_LMID: %s\n", dlerror ()); | ||
else | ||
{ | ||
printf ("dlinfo RTLD_DI_LMID worked? %#lx\n", lmid); | ||
status = lmid == 0xdeadbeefUL; | ||
} | ||
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#undef TRY | ||
dlclose (handle); | ||
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return status; | ||
} | ||
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#include "../test-skeleton.c" |
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