diff options
| -rw-r--r-- | ChangeLog | 7 | ||||
| -rw-r--r-- | elf/Makefile | 2 | ||||
| -rw-r--r-- | elf/Versions | 3 | ||||
| -rw-r--r-- | elf/dl-preinit.c | 49 | ||||
| -rw-r--r-- | elf/dynamic-link.h | 4 | ||||
| -rw-r--r-- | elf/link.h | 4 | ||||
| -rw-r--r-- | sysdeps/i386/dl-machine.h | 12 |
7 files changed, 80 insertions, 1 deletions
@@ -1,5 +1,12 @@ 1999-07-24 Ulrich Drepper <drepper@cygnus.com> + * elf/Makefile (dl-routines): Add preinit. + * elf/Versions [ld.so] (GLIBC_2.2): Export _dl_preinit_next. + * elf/link.h (struct link_map): Add new field l_preinitcount. + * elf/dl-preinit.c: New file. + * elf/dynamic-link.h: Initialize l_preinitcount. + * sysdeps/i386/dl-machine.h (RTLD_START): Call pre-init functions. + * elf/dl-fini.c: Handle DT_FINI_ARRAY. * elf/link.h (struct link_map): Remove l_init_running. Add l_runcount and l_initcount. diff --git a/elf/Makefile b/elf/Makefile index 225b56f..5cecc2b 100644 --- a/elf/Makefile +++ b/elf/Makefile @@ -28,7 +28,7 @@ routines = $(dl-routines) dl-open dl-close dl-symbol dl-support \ # profiled libraries. dl-routines = $(addprefix dl-,load cache lookup object reloc deps \ runtime error init fini debug misc \ - version profile) + version profile preinit) # But they are absent from the shared libc, because that code is in ld.so. elide-routines.os = $(dl-routines) dl-support enbl-secure diff --git a/elf/Versions b/elf/Versions index c45ba04..b3d9d43 100644 --- a/elf/Versions +++ b/elf/Versions @@ -48,4 +48,7 @@ ld.so { # functions used in other libraries _dl_dst_count; _dl_dst_substitute; } + GLIBC_2.2 { + _dl_preinit_next; + } } diff --git a/elf/dl-preinit.c b/elf/dl-preinit.c new file mode 100644 index 0000000..67c5edb --- /dev/null +++ b/elf/dl-preinit.c @@ -0,0 +1,49 @@ +/* Return the next shared object pre-initializer function not yet run. + Copyright (C) 1995, 1996, 1998, 1999 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 Library General Public License as + published by the Free Software Foundation; either version 2 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 + Library General Public License for more details. + + You should have received a copy of the GNU Library General Public + License along with the GNU C Library; see the file COPYING.LIB. If not, + write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, + Boston, MA 02111-1307, USA. */ + +#include <stddef.h> +#include <elf/ldsodefs.h> + + +/* Run initializers for MAP and its dependencies, in inverse dependency + order (that is, leaf nodes first). */ + +ElfW(Addr) +internal_function +_dl_preinit_next (struct r_scope_elem *searchlist) +{ + struct link_map *l = searchlist->r_list[0]; + ElfW(Addr) *array; + + if (l->l_runcount >= l->l_preinitcount) + { + /* That were all of the constructors. */ + l->l_runcount = 0; + return 0; + } + + /* Print a debug message if wanted. */ + if (_dl_debug_impcalls && l->l_runcount == 0) + _dl_debug_message (1, "\ncalling preinit: ", + l->l_name[0] ? l->l_name : _dl_argv[0], + "\n\n", NULL); + + array = (ElfW(Addr) *) l->l_info[DT_PREINIT_ARRAY]->d_un.d_ptr; + return l->l_addr + array[l->l_runcount++]; +} diff --git a/elf/dynamic-link.h b/elf/dynamic-link.h index bdd297e..7edac41 100644 --- a/elf/dynamic-link.h +++ b/elf/dynamic-link.h @@ -118,6 +118,10 @@ elf_get_dynamic_info (struct link_map *l) ? (info[DT_INIT_ARRAYSZ]->d_un.d_val / sizeof (ElfW(Addr))) : 0); + l->l_preinitcount = (info[DT_PREINIT_ARRAY] + ? (info[DT_PREINIT_ARRAYSZ]->d_un.d_val + / sizeof (ElfW(Addr))) + : 0); if (info[DT_RUNPATH] != NULL) /* If both RUNPATH and RPATH are given, the latter is ignored. */ info[DT_RPATH] = NULL; @@ -211,6 +211,10 @@ struct link_map /* Collected information about own RUNPATH directories. */ struct r_search_path_elem **l_runpath_dirs; + + /* Number of pre-constructors. We compute this during loading to avoid + duplication of this during the possibly many calls to _dl_init_next. */ + unsigned int l_preinitcount; }; #endif /* link.h */ diff --git a/sysdeps/i386/dl-machine.h b/sysdeps/i386/dl-machine.h index 0377157..2a14d73 100644 --- a/sysdeps/i386/dl-machine.h +++ b/sysdeps/i386/dl-machine.h @@ -229,6 +229,18 @@ _dl_start_user:\n\ # _dl_init_next call below.\n\ movl _dl_main_searchlist@GOT(%ebx), %eax\n\ movl (%eax), %esi\n\ + # First run the pre-initializers.\n\ +0: movl %esi,%eax\n\ + # Call _dl_init_next to return the address of an initializer\n\ + # function to run.\n\ + call _dl_preinit_next@PLT\n\ + # Check for zero return, when out of initializers.\n\ + testl %eax, %eax\n\ + jz 0f\n\ + # Call the pre-initilizer.\n\ + call *%eax\n\ + # Loop to call _dl_preinit_next for the next initializer.\n\ + jmp 0b\n\ 0: movl %esi,%eax\n\ # Call _dl_init_next to return the address of an initializer\n\ # function to run.\n\ |