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* manual/Makefile (glibc-targets): Variable and targets removed. Sat Jul 13 23:50:17 1996 Roland McGrath <roland@delasyd.gnu.ai.mit.edu> * manual/Makefile (lib): New phony target. Depend on stamp files. ($(objpfx)stamp%-$(subdir)): New rule to create them when necessary. 1996-07-13 Paul Eggert <eggert@twinsun.com> * time/strftime.c (strftime): Use space padding for %e, %k, %l, to match Emacs format-time-string specification. (DO_NUMBER_SPACEPAD): Renamed from DO_NUMBER_NOPAD. Sat Jul 13 20:17:38 1996 Roland McGrath <roland@delasyd.gnu.ai.mit.edu> * elf/dl-deps.c (_dl_map_object_deps): Take new args PRELOADS and NPRELOADS, vector of `struct link_map *'s; add them to the searchlist between MAP and its deps. * elf/link.h: Fix decl. * elf/rtld.c (dl_main): If not secure, parse LD_PRELOAD for colon-separated list of names, map those and pass vector of ptrs as PRELOADS list to _dl_map_object_deps. * elf/dl-runtime.c (_dl_object_relocation_scope): Pass new args to _dl_map_object_deps with empty preload list. * elf/dl-open.c (_dl_open): Likewise. * sysdeps/mach/hurd/dl-sysdep.c (_dl_sysdep_open_zero_fill): Function removed. (__mmap): Pass MACH_PORT_NULL for memobj port when (flags & MAP_ANON). * sysdeps/generic/dl-sysdep.c (_dl_sysdep_open_zero_fill): Conditionalize defn on [! MAP_ANON]. * elf/dl-minimal.c (malloc): Conditionalize use of _dl_zerofd on [! MAP_ANON]. * elf/rtld.c (dl_main): Likewise. * elf/dl-load.c (_dl_zerofd): Conditionalize defn on [! MAP_ANON]. (_dl_map_object_from_fd): Conditionalize initialization of _dl_zerofd. * elf/dl-fini.c (_dl_fini): Skip finalizer for executable itself. Sat Jul 13 02:47:53 1996 David Mosberger-Tang <davidm@azstarnet.com> * stdlib/random.c (__random): Declare as int32_t to be in sync with declaration. * socket/Makefile (headers): Add socketbits.h. * misc/mntent.c (endmntent): Allow for NULL stream. SunOS does it that way. * grp/initgroups.c (initgroups): Add groups that user is a member of, not the ones he is _not_ a member of. * nss/nsswitch.c (known_compare): Make known_compare() a static instead of a local function. The latter are difficult to debug and slow to execute on certain platforms. * sysdeps/posix/ttyname_r.c (ttyname_r): Use sizeof (dev) - 1 in place of sizeof (dev). The size of a literal string includes the NUL byte. * sysdeps/unix/getlogin.c (getlogin): Initialize ut_fd with -1. Thu Jul 11 16:59:10 1996 David Mosberger-Tang <davidm@azstarnet.com> * misc/mntent.c (addmntent): Seek to end of file before writing entry. Return 1 on error, not -1. Tue Jul 9 19:08:05 1996 David Mosberger-Tang <davidm@azstarnet.com> * sysdeps/unix/sysv/linux/syscalls.list: Mark bdflush as EXTRA syscall. Fri Jul 5 18:44:55 1996 David Mosberger-Tang <davidm@azstarnet.com> * sysdeps/unix/sysv/linux/alpha/ioperm.c (port_to_cpu_addr): Size shift amount for Jensen must be 5 not 4. Sat Jul 13 20:04:28 1996 Roland McGrath <roland@delasyd.gnu.ai.mit.edu> * socket/sys/socket.h (struct osockaddr): New type. Sat Jul 13 03:50:53 1996 Ulrich Drepper <drepper@cygnus.com> * misc/Makefile (routines): Add qefgcvt and qefgcvt_r. * misc/efgcvt.c, misc/efgcvt_r.c: Change code so that the `double' and `long double' versions can be generated. * misc/qefgcvt.c, misc/qefgcvt_r.c: New files. Define macros so that included efgcvt{,_r}.c file generate `long double' versions. * stdlib/stdlib.h: Add prototypes for q[efg]cvt() and q[ef]cvt_r() functions. * manual/startup.texi: Document new getsubopt function. * manual/examples/subopt.c: New example program for documenting getsubopt function. Fri Jul 12 23:58:37 1996 Ulrich Drepper <drepper@cygnus.com> * stdlib/Makefile (routines): Add getsubopt. * stdlib/stdlib.h: Add prototype for getsubopt. * stdlib/getsubopt.c: New file. Implement getsubopt function to handle suboption parsing.
128 lines
3.6 KiB
C
128 lines
3.6 KiB
C
/* Load a shared object at runtime, relocate it, and run its initializer.
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Copyright (C) 1996 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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modify it under the terms of the GNU Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If
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not, write to the Free Software Foundation, Inc., 675 Mass Ave,
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Cambridge, MA 02139, USA. */
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#include <link.h>
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#include <dlfcn.h>
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#include <stdlib.h>
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#include <errno.h>
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size_t _dl_global_scope_alloc;
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struct link_map *
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_dl_open (const char *file, int mode)
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{
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struct link_map *new, *l;
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ElfW(Addr) init;
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struct r_debug *r;
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/* Load the named object. */
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new = _dl_map_object (NULL, file, lt_loaded);
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if (new->l_searchlist)
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/* It was already open. */
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return new;
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/* Load that object's dependencies. */
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_dl_map_object_deps (new, NULL, 0);
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/* Relocate the objects loaded. We do this in reverse order so that copy
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relocs of earlier objects overwrite the data written by later objects. */
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l = new;
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while (l->l_next)
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l = l->l_next;
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while (1)
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{
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if (! l->l_relocated)
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{
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_dl_relocate_object (l, _dl_object_relocation_scope (l),
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(mode & RTLD_BINDING_MASK) == RTLD_LAZY);
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*_dl_global_scope_end = NULL;
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}
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if (l == new)
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break;
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l = l->l_prev;
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}
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new->l_global = (mode & RTLD_GLOBAL);
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if (new->l_global)
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{
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/* The symbols of the new object and its dependencies are to be
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introduced into the global scope that will be used to resolve
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references from other dynamically-loaded objects. */
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if (_dl_global_scope_alloc == 0)
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{
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/* This is the first dynamic object given global scope. */
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_dl_global_scope_alloc = 8;
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_dl_global_scope = malloc (8 * sizeof (struct link_map *));
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if (! _dl_global_scope)
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{
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_dl_global_scope = _dl_default_scope;
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nomem:
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_dl_close (new);
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_dl_signal_error (ENOMEM, file, "cannot extend global scope");
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}
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_dl_global_scope[2] = _dl_default_scope[2];
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_dl_global_scope[3] = new;
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_dl_global_scope[4] = NULL;
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_dl_global_scope[5] = NULL;
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}
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else
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{
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if (_dl_global_scope_alloc <
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_dl_global_scope_end - _dl_global_scope + 2)
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{
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/* Must extend the list. */
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struct link_map **new = realloc (_dl_global_scope,
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_dl_global_scope_alloc * 2);
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if (! new)
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goto nomem;
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_dl_global_scope_end = new + (_dl_global_scope_end -
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_dl_global_scope);
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_dl_global_scope = new;
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_dl_global_scope_alloc *= 2;
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}
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/* Append the new object and re-terminate the list. */
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*_dl_global_scope_end++ = new;
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/* We keep the list double-terminated so the last element
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can be filled in for symbol lookups. */
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_dl_global_scope_end[0] = NULL;
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_dl_global_scope_end[1] = NULL;
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}
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}
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/* Notify the debugger we have added some objects. We need to call
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_dl_debug_initialize in a static program in case dynamic linking has
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not been used before. */
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r = _dl_debug_initialize (0);
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r->r_state = RT_ADD;
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_dl_debug_state ();
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/* Run the initializer functions of new objects. */
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while (init = _dl_init_next (new))
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(*(void (*) (void)) init) ();
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return new;
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}
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