mirror of
git://sourceware.org/git/glibc.git
synced 2024-11-21 01:12:26 +08:00
688903eb3e
* All files with FSF copyright notices: Update copyright dates using scripts/update-copyrights. * locale/programs/charmap-kw.h: Regenerated. * locale/programs/locfile-kw.h: Likewise.
83 lines
2.8 KiB
C
83 lines
2.8 KiB
C
/* Configuration of lookup functions.
|
|
Copyright (C) 2000-2018 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 Lesser General Public
|
|
License as published by the Free Software Foundation; either
|
|
version 2.1 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
|
|
Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public
|
|
License along with the GNU C Library. If not, see
|
|
<http://www.gnu.org/licenses/>. */
|
|
|
|
#define ELF_FUNCTION_PTR_IS_SPECIAL
|
|
#define DL_UNMAP_IS_SPECIAL
|
|
|
|
#include <dl-fptr.h>
|
|
|
|
/* Forward declaration. */
|
|
struct link_map;
|
|
|
|
void *_dl_symbol_address (struct link_map *map, const ElfW(Sym) *ref);
|
|
rtld_hidden_proto (_dl_symbol_address)
|
|
|
|
#define DL_SYMBOL_ADDRESS(map, ref) _dl_symbol_address(map, ref)
|
|
|
|
Elf32_Addr _dl_lookup_address (const void *address);
|
|
|
|
#define DL_LOOKUP_ADDRESS(addr) _dl_lookup_address ((const void *) addr)
|
|
|
|
void attribute_hidden _dl_unmap (struct link_map *map);
|
|
|
|
#define DL_UNMAP(map) _dl_unmap (map)
|
|
|
|
#define DL_DT_FUNCTION_ADDRESS(map, start, attr, addr) \
|
|
attr volatile unsigned int fptr[2]; \
|
|
/* The test for "start & 2" below is to accommodate old binaries which \
|
|
violated the ELF ABI by pointing DT_INIT and DT_FINI at a function \
|
|
descriptor. */ \
|
|
if ((ElfW(Addr)) (start) & 2) \
|
|
addr = (ElfW(Addr)) start; \
|
|
else \
|
|
{ \
|
|
fptr[0] = (unsigned int) (start); \
|
|
fptr[1] = (map)->l_info[DT_PLTGOT]->d_un.d_ptr; \
|
|
/* Set bit 30 to indicate to $$dyncall that this is a PLABEL. */ \
|
|
addr = (ElfW(Addr))((unsigned int)fptr | 2); \
|
|
} \
|
|
|
|
#define DL_CALL_DT_INIT(map, start, argc, argv, env) \
|
|
{ \
|
|
ElfW(Addr) addr; \
|
|
DL_DT_FUNCTION_ADDRESS(map, start, , addr) \
|
|
init_t init = (init_t) addr; \
|
|
init (argc, argv, env); \
|
|
}
|
|
|
|
#define DL_CALL_DT_FINI(map, start) \
|
|
{ \
|
|
ElfW(Addr) addr; \
|
|
DL_DT_FUNCTION_ADDRESS(map, start, , addr) \
|
|
fini_t fini = (fini_t) addr; \
|
|
fini (); \
|
|
}
|
|
|
|
/* The type of the return value of fixup/profile_fixup */
|
|
#define DL_FIXUP_VALUE_TYPE struct fdesc
|
|
|
|
/* Construct a fixup value from the address and linkmap */
|
|
#define DL_FIXUP_MAKE_VALUE(map, addr) \
|
|
(map) ? ((struct fdesc) { (addr), (map)->l_info[DT_PLTGOT]->d_un.d_ptr }) \
|
|
: ((struct fdesc) { 0, 0 })
|
|
|
|
/* Extract the code address from a fixup value */
|
|
#define DL_FIXUP_VALUE_CODE_ADDR(value) ((value).ip)
|
|
#define DL_FIXUP_VALUE_ADDR(value) ((uintptr_t) &(value))
|
|
#define DL_FIXUP_ADDR_VALUE(addr) (*(struct fdesc *) (addr))
|