2 * Copyright (c) 2009,2011 Kai Wang
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 #include "_libdwarf.h"
29 ELFTC_VCSID("$Id: libdwarf_loclist.c 3061 2014-06-02 00:42:41Z kaiwang27 $");
32 _dwarf_loclist_add_locdesc(Dwarf_Debug dbg, Dwarf_CU cu, Dwarf_Section *ds,
33 Dwarf_Unsigned *off, Dwarf_Locdesc **ld, Dwarf_Signed *ldlen,
34 Dwarf_Unsigned *total_len, Dwarf_Error *error)
39 if (total_len != NULL)
42 for (i = 0; *off < ds->ds_size; i++) {
43 start = dbg->read(ds->ds_data, off, cu->cu_pointer_size);
44 end = dbg->read(ds->ds_data, off, cu->cu_pointer_size);
46 ld[i]->ld_lopc = start;
50 if (total_len != NULL)
51 *total_len += 2 * cu->cu_pointer_size;
53 /* Check if it is the end entry. */
54 if (start == 0 && end ==0) {
59 /* Check if it is base-select entry. */
60 if ((cu->cu_pointer_size == 4 && start == ~0U) ||
61 (cu->cu_pointer_size == 8 && start == ~0ULL))
64 /* Otherwise it's normal entry. */
65 len = dbg->read(ds->ds_data, off, 2);
66 if (*off + len > ds->ds_size) {
67 DWARF_SET_ERROR(dbg, error,
68 DW_DLE_DEBUG_LOC_SECTION_SHORT);
69 return (DW_DLE_DEBUG_LOC_SECTION_SHORT);
72 if (total_len != NULL)
76 ret = _dwarf_loc_fill_locdesc(dbg, ld[i],
77 ds->ds_data + *off, len, cu->cu_pointer_size,
78 cu->cu_length_size == 4 ? 4 : 8, cu->cu_version,
80 if (ret != DW_DLE_NONE)
94 _dwarf_loclist_find(Dwarf_Debug dbg, Dwarf_CU cu, uint64_t lloff,
95 Dwarf_Locdesc ***ret_llbuf, Dwarf_Signed *listlen,
96 Dwarf_Unsigned *entry_len, Dwarf_Error *error)
98 Dwarf_Locdesc **llbuf;
104 if ((ds = _dwarf_find_section(dbg, ".debug_loc")) == NULL) {
105 DWARF_SET_ERROR(dbg, error, DW_DLE_NO_ENTRY);
106 return (DW_DLE_NO_ENTRY);
109 if (lloff >= ds->ds_size) {
110 DWARF_SET_ERROR(dbg, error, DW_DLE_NO_ENTRY);
111 return (DW_DLE_NO_ENTRY);
114 /* Get the number of locdesc the first round. */
116 ret = _dwarf_loclist_add_locdesc(dbg, cu, ds, &off, NULL, &ldlen,
118 if (ret != DW_DLE_NONE)
122 return (DW_DLE_NO_ENTRY);
125 * Dwarf_Locdesc list memory is allocated in this way (one more level
126 * of indirect) to make the loclist API be compatible with SGI libdwarf.
128 if ((llbuf = calloc(ldlen, sizeof(Dwarf_Locdesc *))) == NULL) {
129 DWARF_SET_ERROR(dbg, error, DW_DLE_MEMORY);
130 return (DW_DLE_MEMORY);
132 for (i = 0; i < ldlen; i++) {
133 if ((llbuf[i] = calloc(1, sizeof(Dwarf_Locdesc))) == NULL) {
134 DWARF_SET_ERROR(dbg, error, DW_DLE_MEMORY);
142 /* Fill in locdesc. */
143 ret = _dwarf_loclist_add_locdesc(dbg, cu, ds, &off, llbuf, NULL,
145 if (ret != DW_DLE_NONE)
151 return (DW_DLE_NONE);
156 for (i = 0; i < ldlen; i++) {
158 free(llbuf[i]->ld_s);