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