mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-04 02:40:06 +00:00
78 lines
2.5 KiB
C
78 lines
2.5 KiB
C
|
/* Run-time dynamic linker data structures for loaded ELF shared objects.
|
||
|
|
Copyright (C) 2005 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, write to the Free
|
||
|
|
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
|
||
|
|
02111-1307 USA. */
|
||
|
|
|
||
|
|
#ifndef _LDSODEFS_H
|
||
|
|
|
||
|
|
/* Get the real definitions. */
|
||
|
|
#include_next <ldsodefs.h>
|
||
|
|
|
||
|
|
/* Now define our stuff. */
|
||
|
|
|
||
|
|
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_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 /* ldsodefs.h */
|