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/* Run-time dynamic linker data structures for loaded ELF shared objects.
Copyright (C) 2005-2020 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
<https://www.gnu.org/licenses/>. */
#ifndef _LDSODEFS_H
/* Get the real definitions. */
#include_next <ldsodefs.h>
/* Now define our stuff. */
#if _CALL_ELF != 2
static __always_inline bool
_dl_ppc64_is_opd_sym (const struct link_map *l, const ElfW(Sym) *sym)
{
return (ELFW(ST_TYPE) (sym->st_info) == STT_FUNC
&& l->l_addr + sym->st_value >= (ElfW(Addr)) l->l_ld
&& l->l_addr + sym->st_value < l->l_map_end
&& sym->st_size != 0);
}
static __always_inline bool
_dl_ppc64_addr_sym_match (const struct link_map *l, const ElfW(Sym) *sym,
const ElfW(Sym) *matchsym, ElfW(Addr) addr)
{
ElfW(Addr) value = l->l_addr + sym->st_value;
if (_dl_ppc64_is_opd_sym (l, sym))
{
if (addr < value || addr >= value + 24)
{
value = *(ElfW(Addr) *) value;
if (addr < value || addr >= value + sym->st_size)
return false;
}
}
else if (sym->st_shndx == SHN_UNDEF || sym->st_size == 0)
{
if (addr != value)
return false;
}
else if (addr < value || addr >= value + sym->st_size)
return false;
if (matchsym == NULL)
return true;
ElfW(Addr) matchvalue = l->l_addr + matchsym->st_value;
if (_dl_ppc64_is_opd_sym (l, matchsym)
&& (addr < matchvalue || addr > matchvalue + 24))
matchvalue = *(ElfW(Addr) *) matchvalue;
return matchvalue < value;
}
/* If this is a function symbol defined past the end of our dynamic
section, then it must be a function descriptor. Allow these symbols
to match their associated function code range as well as the
descriptor addresses. */
#undef DL_ADDR_SYM_MATCH
#define DL_ADDR_SYM_MATCH(L, SYM, MATCHSYM, ADDR) \
_dl_ppc64_addr_sym_match (L, SYM, MATCHSYM, ADDR)
#endif
#endif /* ldsodefs.h */
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