Update.
* include/link.h: Include sysd-link.h. * sysdeps/generic/sysd-link.h: New file. * sysdeps/unix/sysv/linux/sysd-link.h: New file. * elf/Makefile (distribute): Add sysd-link.h. * elf/dl-load.c: Use definitions from sysd-link.h instead of stat types and functions directly. * elf/dl-misc.c: Likewise. * elf/dl-profile.c: Likewise. * elf/loadfail.c (main): Close all successfully loaded objects.
This commit is contained in:
Ulrich Drepper
parent
07a3d63e52
commit
fc7f617d30
11
ChangeLog
11
ChangeLog
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@ -1,5 +1,16 @@
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2000-08-15 Ulrich Drepper <drepper@redhat.com>
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* include/link.h: Include sysd-link.h.
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* sysdeps/generic/sysd-link.h: New file.
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* sysdeps/unix/sysv/linux/sysd-link.h: New file.
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* elf/Makefile (distribute): Add sysd-link.h.
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* elf/dl-load.c: Use definitions from sysd-link.h instead of stat
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types and functions directly.
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* elf/dl-misc.c: Likewise.
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* elf/dl-profile.c: Likewise.
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* elf/loadfail.c (main): Close all successfully loaded objects.
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* elf/multiload.c: Add mtrace call. Call dlclose for all handles and
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free wd.
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* elf/dl-deps.c (_dl_map_object_deps): Don't allocate needed list if
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@ -47,7 +47,8 @@ distribute := $(rtld-routines:=.c) dynamic-link.h do-rel.h dl-machine.h \
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vismain.c vismod1.c vismod2.c vismod3.c \
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constload2.c constload3.c filtmod1.c filtmod2.c \
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nodlopenmod.c nodelete.c nodelmod1.c nodelmod2.c \
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nodelmod3.c nodelmod4.c nodlopen.c
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nodelmod3.c nodelmod4.c nodlopen.c \
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sysd-link.h
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include ../Makeconfig
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@ -730,10 +730,10 @@ _dl_map_object_from_fd (const char *name, int fd, char *realname,
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int type;
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char *readbuf;
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ssize_t readlength;
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struct stat st;
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struct elf_stat st;
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/* Get file information. */
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if (__fxstat (_STAT_VER, fd, &st) < 0)
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if (elf_fxstat (_STAT_VER, fd, &st) < 0)
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LOSE (errno, N_("cannot stat shared object"));
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/* Look again to see if the real name matched another already loaded. */
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@ -1260,11 +1260,11 @@ open_path (const char *name, size_t namelen, int preloaded,
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{
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/* We failed to open machine dependent library. Let's
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test whether there is any directory at all. */
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struct stat st;
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struct elf_stat st;
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buf[buflen - namelen - 1] = '\0';
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if (__xstat (_STAT_VER, buf, &st) != 0
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if (elf_xstat (_STAT_VER, buf, &st) != 0
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|| ! S_ISDIR (st.st_mode))
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/* The directory does not exist or it is no directory. */
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this_dir->status[cnt] = nonexisting;
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@ -1281,9 +1281,9 @@ open_path (const char *name, size_t namelen, int preloaded,
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/* This is an extra security effort to make sure nobody can
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preload broken shared objects which are in the trusted
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directories and so exploit the bugs. */
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struct stat st;
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struct elf_stat st;
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if (__fxstat (_STAT_VER, fd, &st) != 0
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if (elf_fxstat (_STAT_VER, fd, &st) != 0
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|| (st.st_mode & S_ISUID) == 0)
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{
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/* The shared object cannot be tested for being SUID
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@ -1,5 +1,5 @@
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/* Miscellaneous support functions for dynamic linker
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Copyright (C) 1997, 1998, 1999 Free Software Foundation, Inc.
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Copyright (C) 1997, 1998, 1999, 2000 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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@ -19,7 +19,7 @@
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#include <assert.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include <link.h>
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#include <stdarg.h>
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#include <string.h>
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#include <unistd.h>
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@ -45,11 +45,11 @@ void *
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_dl_sysdep_read_whole_file (const char *file, size_t *sizep, int prot)
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{
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void *result;
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struct stat st;
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struct elf_stat st;
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int fd = __open (file, O_RDONLY);
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if (fd < 0)
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return NULL;
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if (__fxstat (_STAT_VER, fd, &st) < 0
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if (elf_fxstat (_STAT_VER, fd, &st) < 0
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/* No need to map the file if it is empty. */
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|| st.st_size == 0)
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result = NULL;
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@ -175,7 +175,7 @@ _dl_start_profile (struct link_map *map, const char *output_dir)
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{
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char *filename;
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int fd;
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struct stat st;
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struct elf_stat st;
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const ElfW(Phdr) *ph;
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ElfW(Addr) mapstart = ~((ElfW(Addr)) 0);
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ElfW(Addr) mapend = 0;
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@ -267,7 +267,7 @@ _dl_start_profile (struct link_map *map, const char *output_dir)
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return;
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}
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if (fstat (fd, &st) < 0 || !S_ISREG (st.st_mode))
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if (elf_fxstat (_STAT_VER, fd, &st) < 0 || !S_ISREG (st.st_mode))
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{
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/* Not stat'able or not a regular file => don't use it. */
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char buf[400];
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@ -1,25 +1,36 @@
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#include <dlfcn.h>
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#include <error.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 *su[5];
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void *h;
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int n;
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if (dlopen ("testobj1.so", RTLD_GLOBAL | RTLD_NOW) == NULL
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|| dlopen ("testobj1.so", RTLD_GLOBAL | RTLD_NOW) == NULL
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|| dlopen ("testobj2.so", RTLD_GLOBAL | RTLD_NOW) == NULL
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|| dlopen ("testobj3.so", RTLD_GLOBAL | RTLD_NOW) == NULL
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|| dlopen ("testobj4.so", RTLD_GLOBAL | RTLD_NOW) == NULL
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|| dlopen ("testobj5.so", RTLD_GLOBAL | RTLD_NOW) == NULL)
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mtrace ();
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if ((su[0] = dlopen ("testobj1.so", RTLD_GLOBAL | RTLD_NOW)) == NULL
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|| (su[1] = dlopen ("testobj2.so", RTLD_GLOBAL | RTLD_NOW)) == NULL
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|| (su[2] = dlopen ("testobj3.so", RTLD_GLOBAL | RTLD_NOW)) == NULL
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|| (su[3] = dlopen ("testobj4.so", RTLD_GLOBAL | RTLD_NOW)) == NULL
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|| (su[4] = dlopen ("testobj5.so", RTLD_GLOBAL | RTLD_NOW)) == NULL)
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error (EXIT_FAILURE, 0, "failed to load shared object: %s", dlerror ());
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h = dlopen ("failobj.so", RTLD_GLOBAL | RTLD_NOW);
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printf ("h = %p, %s\n", h, h == NULL ? "ok" : "fail");
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for (n = 0; n < 5; ++n)
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if (dlclose (su[n]) != 0)
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{
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printf ("failed to unload su[%d]: %s\n", n, dlerror ());
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exit (EXIT_FAILURE);
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}
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return h != NULL;
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}
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@ -34,6 +34,9 @@
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#include <bits/elfclass.h> /* Defines __ELF_NATIVE_CLASS. */
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/* Get some system specific definitions. */
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#include <sysd-link.h>
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/* Rendezvous structure used by the run-time dynamic linker to communicate
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details of shared object loading to the debugger. If the executable's
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dynamic section has a DT_DEBUG element, the run-time linker sets that
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/* This information is kept to check for sure whether a shared
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object is the same as one already loaded. */
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dev_t l_dev;
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ino_t l_ino;
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elf_ino_t l_ino;
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/* Collected information about own RUNPATH directories. */
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struct r_search_path_elem **l_runpath_dirs;
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@ -0,0 +1,5 @@
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/* In general we don't have stat64 available. */
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#define elf_stat stat
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#define elf_fxstat __fxstat
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#define elf_xstat __xstat
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#define elf_ino_t ino_t
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@ -0,0 +1,5 @@
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/* On Linux we have stat64 available. */
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#define elf_stat stat64
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#define elf_fxstat __fxstat64
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#define elf_xstat __xstat64
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#define elf_ino_t ino64_t
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