1998-03-24 08:39:45 +08:00
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/* Data structure for communication from the run-time dynamic linker for
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loaded ELF shared objects.
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2013-01-03 03:01:50 +08:00
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Copyright (C) 1995-2013 Free Software Foundation, Inc.
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1996-11-15 12:08:00 +08:00
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This file is part of the GNU C Library.
|
1995-05-02 14:35:55 +08:00
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1996-11-15 12:08:00 +08:00
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The GNU C Library is free software; you can redistribute it and/or
|
2001-07-06 12:58:11 +08:00
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modify it under the terms of the GNU Lesser General Public
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|
License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
|
1995-05-02 14:35:55 +08:00
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1996-11-15 12:08:00 +08:00
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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
|
2001-07-06 12:58:11 +08:00
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Lesser General Public License for more details.
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1995-05-02 14:35:55 +08:00
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2001-07-06 12:58:11 +08:00
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|
You should have received a copy of the GNU Lesser General Public
|
2012-02-10 07:18:22 +08:00
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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1995-05-02 14:35:55 +08:00
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#ifndef _LINK_H
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#define _LINK_H 1
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1997-06-21 10:59:26 +08:00
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|
1997-03-09 14:16:49 +08:00
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#include <features.h>
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1995-05-02 14:35:55 +08:00
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#include <elf.h>
|
1997-09-27 08:21:42 +08:00
|
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#include <dlfcn.h>
|
1999-02-19 08:00:05 +08:00
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#include <sys/types.h>
|
1995-05-02 14:35:55 +08:00
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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 18:18:47 +08:00
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|
/* We use this macro to refer to ELF types independent of the native wordsize.
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`ElfW(TYPE)' is used in place of `Elf32_TYPE' or `Elf64_TYPE'. */
|
1996-06-10 21:03:12 +08:00
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|
#define ElfW(type) _ElfW (Elf, __ELF_NATIVE_CLASS, type)
|
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 18:18:47 +08:00
|
|
|
#define _ElfW(e,w,t) _ElfW_1 (e, w, _##t)
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|
|
|
#define _ElfW_1(e,w,t) e##w##t
|
1997-06-21 10:59:26 +08:00
|
|
|
|
|
|
|
#include <bits/elfclass.h> /* Defines __ELF_NATIVE_CLASS. */
|
2005-01-07 06:40:27 +08:00
|
|
|
#include <bits/link.h>
|
1995-05-02 14:35:55 +08:00
|
|
|
|
|
|
|
/* Rendezvous structure used by the run-time dynamic linker to communicate
|
|
|
|
details of shared object loading to the debugger. If the executable's
|
|
|
|
dynamic section has a DT_DEBUG element, the run-time linker sets that
|
|
|
|
element's value to the address where this structure can be found. */
|
|
|
|
|
|
|
|
struct r_debug
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|
|
|
{
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|
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|
int r_version; /* Version number for this protocol. */
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|
|
|
|
|
|
|
struct link_map *r_map; /* Head of the chain of loaded objects. */
|
|
|
|
|
|
|
|
/* This is the address of a function internal to the run-time linker,
|
|
|
|
that will always be called when the linker begins to map in a
|
|
|
|
library or unmap it, and again when the mapping change is complete.
|
|
|
|
The debugger can set a breakpoint at this address if it wants to
|
|
|
|
notice shared object mapping changes. */
|
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 18:18:47 +08:00
|
|
|
ElfW(Addr) r_brk;
|
1995-05-02 14:35:55 +08:00
|
|
|
enum
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|
|
|
{
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|
|
|
/* This state value describes the mapping change taking place when
|
|
|
|
the `r_brk' address is called. */
|
|
|
|
RT_CONSISTENT, /* Mapping change is complete. */
|
|
|
|
RT_ADD, /* Beginning to add a new object. */
|
1997-07-07 06:02:42 +08:00
|
|
|
RT_DELETE /* Beginning to remove an object mapping. */
|
1995-05-02 14:35:55 +08:00
|
|
|
} r_state;
|
|
|
|
|
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 18:18:47 +08:00
|
|
|
ElfW(Addr) r_ldbase; /* Base address the linker is loaded at. */
|
1995-05-02 14:35:55 +08:00
|
|
|
};
|
|
|
|
|
1996-06-13 12:06:45 +08:00
|
|
|
/* This is the instance of that structure used by the dynamic linker. */
|
|
|
|
extern struct r_debug _r_debug;
|
|
|
|
|
1995-05-02 14:35:55 +08:00
|
|
|
/* This symbol refers to the "dynamic structure" in the `.dynamic' section
|
|
|
|
of whatever module refers to `_DYNAMIC'. So, to find its own
|
|
|
|
`struct r_debug', a program could do:
|
1999-09-13 17:07:36 +08:00
|
|
|
for (dyn = _DYNAMIC; dyn->d_tag != DT_NULL; ++dyn)
|
1999-09-11 03:43:01 +08:00
|
|
|
if (dyn->d_tag == DT_DEBUG)
|
|
|
|
r_debug = (struct r_debug *) dyn->d_un.d_ptr;
|
1995-05-02 14:35:55 +08:00
|
|
|
*/
|
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 18:18:47 +08:00
|
|
|
extern ElfW(Dyn) _DYNAMIC[];
|
1995-05-02 14:35:55 +08:00
|
|
|
|
|
|
|
/* Structure describing a loaded shared object. The `l_next' and `l_prev'
|
|
|
|
members form a chain of all the shared objects loaded at startup.
|
|
|
|
|
|
|
|
These data structures exist in space used by the run-time dynamic linker;
|
2000-06-10 13:48:35 +08:00
|
|
|
modifying them may have disastrous results. */
|
1995-05-02 14:35:55 +08:00
|
|
|
|
|
|
|
struct link_map
|
|
|
|
{
|
|
|
|
/* These first few members are part of the protocol with the debugger.
|
|
|
|
This is the same format used in SVR4. */
|
|
|
|
|
2013-02-02 17:29:17 +08:00
|
|
|
ElfW(Addr) l_addr; /* Difference between the address in the ELF
|
|
|
|
file and the addresses in memory. */
|
1995-05-02 14:35:55 +08:00
|
|
|
char *l_name; /* Absolute file name object was found in. */
|
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 18:18:47 +08:00
|
|
|
ElfW(Dyn) *l_ld; /* Dynamic section of the shared object. */
|
1995-05-02 14:35:55 +08:00
|
|
|
struct link_map *l_next, *l_prev; /* Chain of loaded objects. */
|
|
|
|
};
|
1997-01-21 14:10:42 +08:00
|
|
|
|
2001-07-26 04:47:02 +08:00
|
|
|
#ifdef __USE_GNU
|
|
|
|
|
2005-01-07 06:40:27 +08:00
|
|
|
/* Version numbers for la_version handshake interface. */
|
|
|
|
#define LAV_CURRENT 1
|
|
|
|
|
|
|
|
/* Activity types signaled through la_activity. */
|
|
|
|
enum
|
|
|
|
{
|
|
|
|
LA_ACT_CONSISTENT, /* Link map consistent again. */
|
|
|
|
LA_ACT_ADD, /* New object will be added. */
|
|
|
|
LA_ACT_DELETE /* Objects will be removed. */
|
|
|
|
};
|
|
|
|
|
|
|
|
/* Values representing origin of name for dynamic loading. */
|
|
|
|
enum
|
|
|
|
{
|
|
|
|
LA_SER_ORIG = 0x01, /* Original name. */
|
|
|
|
LA_SER_LIBPATH = 0x02, /* Directory from LD_LIBRARY_PATH. */
|
|
|
|
LA_SER_RUNPATH = 0x04, /* Directory from RPATH/RUNPATH. */
|
|
|
|
LA_SER_CONFIG = 0x08, /* Found through ldconfig. */
|
|
|
|
LA_SER_DEFAULT = 0x40, /* Default directory. */
|
|
|
|
LA_SER_SECURE = 0x80 /* Unused. */
|
|
|
|
};
|
|
|
|
|
|
|
|
/* Values for la_objopen return value. */
|
|
|
|
enum
|
|
|
|
{
|
|
|
|
LA_FLG_BINDTO = 0x01, /* Audit symbols bound to this object. */
|
|
|
|
LA_FLG_BINDFROM = 0x02 /* Audit symbols bound from this object. */
|
|
|
|
};
|
|
|
|
|
|
|
|
/* Values for la_symbind flags parameter. */
|
|
|
|
enum
|
|
|
|
{
|
|
|
|
LA_SYMB_NOPLTENTER = 0x01, /* la_pltenter will not be called. */
|
|
|
|
LA_SYMB_NOPLTEXIT = 0x02, /* la_pltexit will not be called. */
|
|
|
|
LA_SYMB_STRUCTCALL = 0x04, /* Return value is a structure. */
|
|
|
|
LA_SYMB_DLSYM = 0x08, /* Binding due to dlsym call. */
|
|
|
|
LA_SYMB_ALTVALUE = 0x10 /* Value has been changed by a previous
|
|
|
|
la_symbind call. */
|
|
|
|
};
|
|
|
|
|
2001-07-26 04:47:02 +08:00
|
|
|
struct dl_phdr_info
|
|
|
|
{
|
|
|
|
ElfW(Addr) dlpi_addr;
|
|
|
|
const char *dlpi_name;
|
|
|
|
const ElfW(Phdr) *dlpi_phdr;
|
|
|
|
ElfW(Half) dlpi_phnum;
|
2004-01-25 04:12:10 +08:00
|
|
|
|
2006-03-01 14:18:49 +08:00
|
|
|
/* Note: Following members were introduced after the first
|
2004-01-25 04:12:10 +08:00
|
|
|
version of this structure was available. Check the SIZE
|
2006-03-01 14:18:49 +08:00
|
|
|
argument passed to the dl_iterate_phdr callback to determine
|
|
|
|
whether or not each later member is available. */
|
2004-01-25 04:12:10 +08:00
|
|
|
|
|
|
|
/* Incremented when a new object may have been added. */
|
2013-01-11 04:19:45 +08:00
|
|
|
__extension__ unsigned long long int dlpi_adds;
|
2004-01-25 04:12:10 +08:00
|
|
|
/* Incremented when an object may have been removed. */
|
2013-01-11 04:19:45 +08:00
|
|
|
__extension__ unsigned long long int dlpi_subs;
|
2006-03-01 14:18:49 +08:00
|
|
|
|
|
|
|
/* If there is a PT_TLS segment, its module ID as used in
|
|
|
|
TLS relocations, else zero. */
|
|
|
|
size_t dlpi_tls_modid;
|
|
|
|
|
|
|
|
/* The address of the calling thread's instance of this module's
|
|
|
|
PT_TLS segment, if it has one and it has been allocated
|
|
|
|
in the calling thread, otherwise a null pointer. */
|
|
|
|
void *dlpi_tls_data;
|
2001-07-26 04:47:02 +08:00
|
|
|
};
|
|
|
|
|
|
|
|
__BEGIN_DECLS
|
|
|
|
|
2005-01-07 06:40:27 +08:00
|
|
|
extern int dl_iterate_phdr (int (*__callback) (struct dl_phdr_info *,
|
|
|
|
size_t, void *),
|
|
|
|
void *__data);
|
|
|
|
|
|
|
|
|
|
|
|
/* Prototypes for the ld.so auditing interfaces. These are not
|
|
|
|
defined anywhere in ld.so but instead have to be provided by the
|
|
|
|
auditing DSO. */
|
|
|
|
extern unsigned int la_version (unsigned int __version);
|
|
|
|
extern void la_activity (uintptr_t *__cookie, unsigned int __flag);
|
|
|
|
extern char *la_objsearch (const char *__name, uintptr_t *__cookie,
|
|
|
|
unsigned int __flag);
|
|
|
|
extern unsigned int la_objopen (struct link_map *__map, Lmid_t __lmid,
|
|
|
|
uintptr_t *__cookie);
|
|
|
|
extern void la_preinit (uintptr_t *__cookie);
|
|
|
|
extern uintptr_t la_symbind32 (Elf32_Sym *__sym, unsigned int __ndx,
|
|
|
|
uintptr_t *__refcook, uintptr_t *__defcook,
|
|
|
|
unsigned int *__flags, const char *__symname);
|
|
|
|
extern uintptr_t la_symbind64 (Elf64_Sym *__sym, unsigned int __ndx,
|
|
|
|
uintptr_t *__refcook, uintptr_t *__defcook,
|
|
|
|
unsigned int *__flags, const char *__symname);
|
|
|
|
extern unsigned int la_objclose (uintptr_t *__cookie);
|
2001-07-26 04:47:02 +08:00
|
|
|
|
|
|
|
__END_DECLS
|
|
|
|
|
|
|
|
#endif
|
|
|
|
|
1995-05-02 14:35:55 +08:00
|
|
|
#endif /* link.h */
|