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81 lines
2.5 KiB
C
81 lines
2.5 KiB
C
/* Run-time dynamic linker data structures for loaded ELF shared objects.
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Copyright (C) 2005-2017 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, see
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<http://www.gnu.org/licenses/>. */
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#ifndef _LDSODEFS_H
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/* Get the real definitions. */
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#include_next <ldsodefs.h>
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/* Now define our stuff. */
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#if _CALL_ELF != 2
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static __always_inline bool
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_dl_ppc64_is_opd_sym (const struct link_map *l, const ElfW(Sym) *sym)
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{
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return (ELFW(ST_TYPE) (sym->st_info) == STT_FUNC
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&& l->l_addr + sym->st_value >= (ElfW(Addr)) l->l_ld
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&& l->l_addr + sym->st_value < l->l_map_end
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&& sym->st_size != 0);
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}
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static __always_inline bool
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_dl_ppc64_addr_sym_match (const struct link_map *l, const ElfW(Sym) *sym,
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const ElfW(Sym) *matchsym, ElfW(Addr) addr)
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{
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ElfW(Addr) value = l->l_addr + sym->st_value;
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if (_dl_ppc64_is_opd_sym (l, sym))
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{
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if (addr < value || addr >= value + 24)
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{
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value = *(ElfW(Addr) *) value;
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if (addr < value || addr >= value + sym->st_size)
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return false;
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}
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}
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else if (sym->st_shndx == SHN_UNDEF || sym->st_size == 0)
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{
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if (addr != value)
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return false;
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}
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else if (addr < value || addr >= value + sym->st_size)
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return false;
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if (matchsym == NULL)
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return true;
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ElfW(Addr) matchvalue = l->l_addr + matchsym->st_value;
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if (_dl_ppc64_is_opd_sym (l, matchsym)
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&& (addr < matchvalue || addr > matchvalue + 24))
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matchvalue = *(ElfW(Addr) *) matchvalue;
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return matchvalue < value;
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}
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/* If this is a function symbol defined past the end of our dynamic
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section, then it must be a function descriptor. Allow these symbols
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to match their associated function code range as well as the
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descriptor addresses. */
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#undef DL_ADDR_SYM_MATCH
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#define DL_ADDR_SYM_MATCH(L, SYM, MATCHSYM, ADDR) \
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_dl_ppc64_addr_sym_match (L, SYM, MATCHSYM, ADDR)
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#endif
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#endif /* ldsodefs.h */
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