freebsd-dev/contrib/elftoolchain/libdwarf/libdwarf_ranges.c

153 lines
3.9 KiB
C

/*-
* Copyright (c) 2009 Kai Wang
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include "_libdwarf.h"
ELFTC_VCSID("$Id: libdwarf_ranges.c 2972 2013-12-23 06:46:04Z kaiwang27 $");
static int
_dwarf_ranges_parse(Dwarf_Debug dbg, Dwarf_CU cu, Dwarf_Section *ds,
uint64_t off, Dwarf_Ranges *rg, Dwarf_Unsigned *cnt)
{
Dwarf_Unsigned start, end;
int i;
i = 0;
while (off < ds->ds_size) {
start = dbg->read(ds->ds_data, &off, cu->cu_pointer_size);
end = dbg->read(ds->ds_data, &off, cu->cu_pointer_size);
if (rg != NULL) {
rg[i].dwr_addr1 = start;
rg[i].dwr_addr2 = end;
if (start == 0 && end == 0)
rg[i].dwr_type = DW_RANGES_END;
else if ((start == ~0U && cu->cu_pointer_size == 4) ||
(start == ~0ULL && cu->cu_pointer_size == 8))
rg[i].dwr_type = DW_RANGES_ADDRESS_SELECTION;
else
rg[i].dwr_type = DW_RANGES_ENTRY;
}
i++;
if (start == 0 && end == 0)
break;
}
if (cnt != NULL)
*cnt = i;
return (DW_DLE_NONE);
}
int
_dwarf_ranges_find(Dwarf_Debug dbg, uint64_t off, Dwarf_Rangelist *ret_rl)
{
Dwarf_Rangelist rl;
STAILQ_FOREACH(rl, &dbg->dbg_rllist, rl_next)
if (rl->rl_offset == off)
break;
if (rl == NULL)
return (DW_DLE_NO_ENTRY);
if (ret_rl != NULL)
*ret_rl = rl;
return (DW_DLE_NONE);
}
void
_dwarf_ranges_cleanup(Dwarf_Debug dbg)
{
Dwarf_Rangelist rl, trl;
if (STAILQ_EMPTY(&dbg->dbg_rllist))
return;
STAILQ_FOREACH_SAFE(rl, &dbg->dbg_rllist, rl_next, trl) {
STAILQ_REMOVE(&dbg->dbg_rllist, rl, _Dwarf_Rangelist, rl_next);
if (rl->rl_rgarray)
free(rl->rl_rgarray);
free(rl);
}
}
int
_dwarf_ranges_add(Dwarf_Debug dbg, Dwarf_CU cu, uint64_t off,
Dwarf_Rangelist *ret_rl, Dwarf_Error *error)
{
Dwarf_Section *ds;
Dwarf_Rangelist rl;
Dwarf_Unsigned cnt;
int ret;
if ((ds = _dwarf_find_section(dbg, ".debug_ranges")) == NULL) {
DWARF_SET_ERROR(dbg, error, DW_DLE_NO_ENTRY);
return (DW_DLE_NO_ENTRY);
}
if ((rl = malloc(sizeof(struct _Dwarf_Rangelist))) == NULL) {
DWARF_SET_ERROR(dbg, error, DW_DLE_MEMORY);
return (DW_DLE_MEMORY);
}
rl->rl_offset = off;
ret = _dwarf_ranges_parse(dbg, cu, ds, off, NULL, &cnt);
if (ret != DW_DLE_NONE) {
free(rl);
return (ret);
}
rl->rl_rglen = cnt;
if (cnt != 0) {
if ((rl->rl_rgarray = calloc(cnt, sizeof(Dwarf_Ranges))) ==
NULL) {
free(rl);
DWARF_SET_ERROR(dbg, error, DW_DLE_MEMORY);
return (DW_DLE_MEMORY);
}
ret = _dwarf_ranges_parse(dbg, cu, ds, off, rl->rl_rgarray,
NULL);
if (ret != DW_DLE_NONE) {
free(rl->rl_rgarray);
free(rl);
return (ret);
}
} else
rl->rl_rgarray = NULL;
STAILQ_INSERT_TAIL(&dbg->dbg_rllist, rl, rl_next);
*ret_rl = rl;
return (DW_DLE_NONE);
}