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69751d3f42
DL_STATIC_FUNCTION_ADDRESS, DL_DT_INIT_ADDRESS and DL_DT_FINI_ADDRESS use the previous two macros.
70 lines
2.5 KiB
C
70 lines
2.5 KiB
C
/* Configuration of lookup functions.
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Copyright (C) 2000 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 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.
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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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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, write to the Free
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Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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02111-1307 USA. */
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/* Like IA-64, PA-RISC needs more information from the symbol lookup
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function than just the address. */
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#define DL_LOOKUP_RETURNS_MAP
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#define ELF_FUNCTION_PTR_IS_SPECIAL
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#define DL_UNMAP_IS_SPECIAL
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/* Forward declaration. */
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struct link_map;
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void *_dl_symbol_address (struct link_map *map, const ElfW(Sym) *ref);
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#define DL_SYMBOL_ADDRESS(map, ref) _dl_symbol_address(map, ref)
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Elf32_Addr _dl_lookup_address (const void *address);
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/* Clear the bottom two bits so generic code can find the fdesc entry */
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#define DL_LOOKUP_ADDRESS(addr) \
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(_dl_lookup_address ((void *)((unsigned long)addr & ~3)))
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void _dl_unmap (struct link_map *map);
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#define DL_UNMAP(map) _dl_unmap (map)
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#define DL_AUTO_FUNCTION_ADDRESS(map, addr) \
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({ \
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unsigned int fptr[2]; \
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fptr[0] = (unsigned int) (addr); \
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fptr[1] = (map)->l_info[DT_PLTGOT]->d_un.d_ptr; \
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/* Set bit 30 to indicate to $$dyncall that this is a PLABEL. */ \
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(ElfW(Addr))((unsigned int)fptr | 2); \
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})
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#define DL_STATIC_FUNCTION_ADDRESS(map, addr) \
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({ \
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static unsigned int fptr[2]; \
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fptr[0] = (unsigned int) (addr); \
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fptr[1] = (map)->l_info[DT_PLTGOT]->d_un.d_ptr; \
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/* Set bit 30 to indicate to $$dyncall that this is a PLABEL. */ \
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(ElfW(Addr))((unsigned int)fptr | 2); \
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})
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/* The test for "addr & 2" below is to accomodate old binaries which
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violated the ELF ABI by pointing DT_INIT and DT_FINI at a function
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descriptor. */
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#define DL_DT_INIT_ADDRESS(map, addr) \
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((Elf32_Addr)(addr) & 2 ? (addr) : DL_AUTO_FUNCTION_ADDRESS (map, addr))
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#define DL_DT_FINI_ADDRESS(map, addr) \
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((Elf32_Addr)(addr) & 2 ? (addr) : DL_AUTO_FUNCTION_ADDRESS (map, addr))
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