1995-11-07 22:46:52 +01:00
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/* Initializer for Linux-compatible dynamic linker `/lib/ld-linux.so.1'.
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1996-06-04 07:18:15 +02:00
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Copyright (C) 1995, 1996 Free Software Foundation, Inc.
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1995-11-07 22:46:52 +01:00
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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 <stdlib.h>
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/* This function will be the DT_INIT initializer for the ld-linux.so.1
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shared object. This is called from rtld.c before shlib initializers.
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The old Linux ELF startup code expects the dynamic linker to magically
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call atexit to arrange for shared object finalizers to run. (The
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ABI-compliant startup code does this itself.) We build a compatible
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version of the dynamic linker to install as /lib/ld-linux.so.1, the
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name old Linux ELF binaries use. */
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void
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_init (void)
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{
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Mon Jun 10 06:14:03 1996 Roland McGrath <roland@delasyd.gnu.ai.mit.edu>
* sysdeps/mach/hurd/dl-sysdep.c (__open): Define this instead of open.
(__close, __mmap): Likewise define with __ names now.
Mon Jun 10 05:13:18 1996 Roland McGrath <roland@delasyd.gnu.ai.mit.edu>
* elf/dl-support.c: New file.
* elf/Makefile (CFLAGS-dl-support.c): New variable.
(routines, elide-routines.so): Add dl-support.
* elf/dl-minimal.c (_dl_pagesize): Remove common defn.
* elf/dl-load.c (_dl_pagesize): Define it here.
(_dl_map_object_from_fd): Initialize it if zero.
* elf/link.h (_dl_pagesize): Remove const.
Sun Jun 9 04:04:26 1996 Roland McGrath <roland@delasyd.gnu.ai.mit.edu>
* elf/Makefile (routines): Add dl-symbol.
* elf/dl-lookup.c (_dl_symbol_value): Moved to ...
* elf/dl-symbol.c: New file.
* elf/elf.h (Elf32_Xword, Elf32_Sxword): New types.
(Elf32_Section, Elf64_Section): New types, 16 bits.
(Elf32_Sym, Elf64_Sym): Use it.
* elf/dl-deps.c (_dl_open): Moved to ...
* elf/dl-open.c: New file.
* Makefile (routines): Add dl-open.
* elf/Makefile (dl-routines): New variable.
(routines): Add $(dl-routines).
(elide-routines.so): New variable, set to $(dl-routines).
(libdl-inhibit-o): Variable removed; build all flavors of -ldl.
(rtld-routines): All but rtld, dl-sysdep, and dl-minimal moved to
$(dl-routines).
* elf/dl-lookup.c (_dl_lookup_symbol): Remove magic symbol grokage.
* elf/dladdr.c: Use ELFW(ST_BIND) in place of ELF32_ST_BIND.
* elf/dl-load.c (open_path): Use __ names for open and close. Avoid
using strdup.
(_dl_map_object): Likewise.
(_dl_map_object_from_fd): Use __ names for mmap, munmap, and mprotect.
* elf/dl-minimal.c (malloc): Likewise.
* elf/dl-reloc.c (_dl_relocate_object): Likewise.
* elf/dl-minimal.c (_dl_pagesize): New variable.
(malloc): Use that instead of a static variable.
* elf/dl-reloc.c (_dl_relocate_object): Use _dl_pagesize instead of
calling getpagesize.
* elf/dl-load.c (_dl_map_object_from_fd): Likewise.
* elf/link.h: Declare _dl_pagesize.
* elf/rtld.c (dl_r_debug): Renamed to _dl_r_debug.
* elf/link.h (struct link_map): Use Half for l_phnum instead of Word.
* elf/rtld.c (dl_main): Use Half for phdr count arg.
(_dl_sysdep_start): Update prototype of DL_MAIN function ptr arg.
* elf/dl-load.c (_dl_map_object_from_fd): Use explicit Elf32_Word to
extract 4-byte magic number, not ElfW(Word). Match EI_CLASS against
native wordsize, either 32 or 64.
* elf/elf.h (Elf64_Byte, Elf64_Section): Typedefs removed. In C a
char is always a byte, no need for a typedef. Section indices are
16-bit quantities in elf64, which already have a typedef Elf64_Half.
Remove partial -lelf implementation. There is now a
separately-distributed `libelf' package that implements it.
* elf/dl-lookup.c: Don't #include <libelf.h> any more.
(_dl_elf_hash): New function, moved from
libelf.h:elf_hash.
(_dl_lookup_symbol): Use it instead of elf_hash.
* elf/libelf.h: File removed.
* elf/elf_hash.c: File removed.
* elf/Makefile (headers): Remove libelf.h.
(extra-libs): Remove libelf.
(libelf-routines): Variable removed.
* elf/Makefile (libdl.so): Remove commands from this target. The
implicit rule commands are correct, this explicit rule just serves to
add some dependencies.
* elf/dl-lookup.c (_dl_lookup_symbol): Use ELFW(ST_TYPE) in place of
ELF32_ST_TYPE. Likewise ST_BIND.
* elf/do-rel.h (elf_dynamic_do_rel): Likewise R_SYM.
* elf/link.h (ElfW): New macro for wordsize-independent ElfXX_* type
naming.
(ELFW): New macro, likewise for ELFXX_* macro naming.
(_ElfW, _ElfW_1): New macros, subroutines of ElfW and ELF.
Sat Jun 8 20:52:38 1996 Roland McGrath <roland@delasyd.gnu.ai.mit.edu>
* elf/link.h, elf/do-rel.h, elf/dynamic-link.h, elf/dl-deps.c,
elf/dl-init.c, elf/dl-load.c, elf/dl-lookup.c, elf/dl-reloc.c,
elf/dl-runtime.c, elf/dladdr.c, elf/dlclose.c, elf/dlsym.c,
elf/linux-compat.c, elf/rtld.c: Change all uses of `Elf32_XXX' to
`ElfW(XXX)' for wordsize-independence.
Sat Jun 8 20:50:42 1996 Richard Henderson <rth@tamu.edu>
* elf/elf.h: Move Elf64_* types in parity with Elf32 counterparts.
(Elf64_auxv_t): New type.
(EM_ALPHA, R_ALPHA_*): New macros for elf64-alpha format.
1996-06-10 12:18:47 +02:00
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const ElfW(Sym) *ref = NULL;
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1996-06-04 07:18:15 +02:00
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struct link_map *scope[2] = { _dl_loaded, NULL };
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Mon Jun 10 06:14:03 1996 Roland McGrath <roland@delasyd.gnu.ai.mit.edu>
* sysdeps/mach/hurd/dl-sysdep.c (__open): Define this instead of open.
(__close, __mmap): Likewise define with __ names now.
Mon Jun 10 05:13:18 1996 Roland McGrath <roland@delasyd.gnu.ai.mit.edu>
* elf/dl-support.c: New file.
* elf/Makefile (CFLAGS-dl-support.c): New variable.
(routines, elide-routines.so): Add dl-support.
* elf/dl-minimal.c (_dl_pagesize): Remove common defn.
* elf/dl-load.c (_dl_pagesize): Define it here.
(_dl_map_object_from_fd): Initialize it if zero.
* elf/link.h (_dl_pagesize): Remove const.
Sun Jun 9 04:04:26 1996 Roland McGrath <roland@delasyd.gnu.ai.mit.edu>
* elf/Makefile (routines): Add dl-symbol.
* elf/dl-lookup.c (_dl_symbol_value): Moved to ...
* elf/dl-symbol.c: New file.
* elf/elf.h (Elf32_Xword, Elf32_Sxword): New types.
(Elf32_Section, Elf64_Section): New types, 16 bits.
(Elf32_Sym, Elf64_Sym): Use it.
* elf/dl-deps.c (_dl_open): Moved to ...
* elf/dl-open.c: New file.
* Makefile (routines): Add dl-open.
* elf/Makefile (dl-routines): New variable.
(routines): Add $(dl-routines).
(elide-routines.so): New variable, set to $(dl-routines).
(libdl-inhibit-o): Variable removed; build all flavors of -ldl.
(rtld-routines): All but rtld, dl-sysdep, and dl-minimal moved to
$(dl-routines).
* elf/dl-lookup.c (_dl_lookup_symbol): Remove magic symbol grokage.
* elf/dladdr.c: Use ELFW(ST_BIND) in place of ELF32_ST_BIND.
* elf/dl-load.c (open_path): Use __ names for open and close. Avoid
using strdup.
(_dl_map_object): Likewise.
(_dl_map_object_from_fd): Use __ names for mmap, munmap, and mprotect.
* elf/dl-minimal.c (malloc): Likewise.
* elf/dl-reloc.c (_dl_relocate_object): Likewise.
* elf/dl-minimal.c (_dl_pagesize): New variable.
(malloc): Use that instead of a static variable.
* elf/dl-reloc.c (_dl_relocate_object): Use _dl_pagesize instead of
calling getpagesize.
* elf/dl-load.c (_dl_map_object_from_fd): Likewise.
* elf/link.h: Declare _dl_pagesize.
* elf/rtld.c (dl_r_debug): Renamed to _dl_r_debug.
* elf/link.h (struct link_map): Use Half for l_phnum instead of Word.
* elf/rtld.c (dl_main): Use Half for phdr count arg.
(_dl_sysdep_start): Update prototype of DL_MAIN function ptr arg.
* elf/dl-load.c (_dl_map_object_from_fd): Use explicit Elf32_Word to
extract 4-byte magic number, not ElfW(Word). Match EI_CLASS against
native wordsize, either 32 or 64.
* elf/elf.h (Elf64_Byte, Elf64_Section): Typedefs removed. In C a
char is always a byte, no need for a typedef. Section indices are
16-bit quantities in elf64, which already have a typedef Elf64_Half.
Remove partial -lelf implementation. There is now a
separately-distributed `libelf' package that implements it.
* elf/dl-lookup.c: Don't #include <libelf.h> any more.
(_dl_elf_hash): New function, moved from
libelf.h:elf_hash.
(_dl_lookup_symbol): Use it instead of elf_hash.
* elf/libelf.h: File removed.
* elf/elf_hash.c: File removed.
* elf/Makefile (headers): Remove libelf.h.
(extra-libs): Remove libelf.
(libelf-routines): Variable removed.
* elf/Makefile (libdl.so): Remove commands from this target. The
implicit rule commands are correct, this explicit rule just serves to
add some dependencies.
* elf/dl-lookup.c (_dl_lookup_symbol): Use ELFW(ST_TYPE) in place of
ELF32_ST_TYPE. Likewise ST_BIND.
* elf/do-rel.h (elf_dynamic_do_rel): Likewise R_SYM.
* elf/link.h (ElfW): New macro for wordsize-independent ElfXX_* type
naming.
(ELFW): New macro, likewise for ELFXX_* macro naming.
(_ElfW, _ElfW_1): New macros, subroutines of ElfW and ELF.
Sat Jun 8 20:52:38 1996 Roland McGrath <roland@delasyd.gnu.ai.mit.edu>
* elf/link.h, elf/do-rel.h, elf/dynamic-link.h, elf/dl-deps.c,
elf/dl-init.c, elf/dl-load.c, elf/dl-lookup.c, elf/dl-reloc.c,
elf/dl-runtime.c, elf/dladdr.c, elf/dlclose.c, elf/dlsym.c,
elf/linux-compat.c, elf/rtld.c: Change all uses of `Elf32_XXX' to
`ElfW(XXX)' for wordsize-independence.
Sat Jun 8 20:50:42 1996 Richard Henderson <rth@tamu.edu>
* elf/elf.h: Move Elf64_* types in parity with Elf32 counterparts.
(Elf64_auxv_t): New type.
(EM_ALPHA, R_ALPHA_*): New macros for elf64-alpha format.
1996-06-10 12:18:47 +02:00
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ElfW(Addr) loadbase = _dl_lookup_symbol ("atexit", &ref, scope,
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1995-11-07 22:46:52 +01:00
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"<ld-linux.so.1 initialization>",
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1996-06-04 07:18:15 +02:00
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0, 1);
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1995-11-07 22:46:52 +01:00
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(*(__typeof (atexit) *) (loadbase + ref->st_value)) (&_dl_fini);
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}
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