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/* Get the symbol address. Morello version.
Copyright (C) 2022 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/>. */
#include <ldsodefs.h>
#include <dl-machine.h>
void *
_dl_symbol_address (struct link_map *map, const ElfW(Sym) *ref)
{
elfptr_t value = SYMBOL_ADDRESS (map, ref, false);
if (map == NULL)
return (void *) value;
if (ELFW(ST_TYPE) (ref->st_info) == STT_OBJECT)
{
unsigned long perm_mask = CAP_PERM_MASK_R;
for (int i = 0; i < map->l_rw_count; i++)
if (map->l_rw_range[i].start <= value
&& map->l_rw_range[i].end > value)
{
value = dl_rw_ptr (map, value - map->l_addr);
perm_mask = CAP_PERM_MASK_RW;
break;
}
value = __builtin_cheri_bounds_set_exact (value, ref->st_size);
value = __builtin_cheri_perms_and (value, perm_mask);
}
else if (ELFW(ST_TYPE) (ref->st_info) == STT_FUNC)
{
/* Seal function pointers. Note: ifunc is handled by the caller. */
value = __builtin_cheri_seal_entry (value);
}
return (void *) value;
}
rtld_hidden_def (_dl_symbol_address)
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