255d921adc
should not exceed the size of the .debug_loc section.
230 lines
5.7 KiB
C
230 lines
5.7 KiB
C
/*-
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* Copyright (c) 2009,2011 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_loclist.c 2972 2013-12-23 06:46:04Z kaiwang27 $");
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static int
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_dwarf_loclist_add_locdesc(Dwarf_Debug dbg, Dwarf_CU cu, Dwarf_Section *ds,
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uint64_t *off, Dwarf_Locdesc **ld, uint64_t *ldlen,
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Dwarf_Unsigned *total_len, Dwarf_Error *error)
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{
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uint64_t start, end;
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int i, len, ret;
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if (total_len != NULL)
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*total_len = 0;
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for (i = 0; *off < ds->ds_size; i++) {
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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 (ld != NULL) {
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ld[i]->ld_lopc = start;
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ld[i]->ld_hipc = end;
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}
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if (total_len != NULL)
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*total_len += 2 * cu->cu_pointer_size;
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/* Check if it is the end entry. */
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if (start == 0 && end ==0) {
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i++;
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break;
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}
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/* Check if it is base-select entry. */
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if ((cu->cu_pointer_size == 4 && start == ~0U) ||
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(cu->cu_pointer_size == 8 && start == ~0ULL))
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continue;
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/* Otherwise it's normal entry. */
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len = dbg->read(ds->ds_data, off, 2);
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if (*off + len > ds->ds_size) {
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DWARF_SET_ERROR(dbg, error,
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DW_DLE_DEBUG_LOC_SECTION_SHORT);
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return (DW_DLE_DEBUG_LOC_SECTION_SHORT);
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}
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if (total_len != NULL)
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*total_len += len;
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if (ld != NULL) {
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ret = _dwarf_loc_fill_locdesc(dbg, ld[i],
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ds->ds_data + *off, len, cu->cu_pointer_size,
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error);
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if (ret != DW_DLE_NONE)
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return (ret);
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}
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*off += len;
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}
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if (ldlen != NULL)
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*ldlen = i;
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return (DW_DLE_NONE);
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}
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int
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_dwarf_loclist_find(Dwarf_Debug dbg, Dwarf_CU cu, uint64_t lloff,
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Dwarf_Loclist *ret_ll, Dwarf_Error *error)
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{
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Dwarf_Loclist ll;
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int ret;
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assert(ret_ll != NULL);
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ret = DW_DLE_NONE;
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TAILQ_FOREACH(ll, &dbg->dbg_loclist, ll_next)
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if (ll->ll_offset == lloff)
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break;
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if (ll == NULL)
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ret = _dwarf_loclist_add(dbg, cu, lloff, ret_ll, error);
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else
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*ret_ll = ll;
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return (ret);
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}
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int
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_dwarf_loclist_add(Dwarf_Debug dbg, Dwarf_CU cu, uint64_t lloff,
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Dwarf_Loclist *ret_ll, Dwarf_Error *error)
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{
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Dwarf_Section *ds;
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Dwarf_Loclist ll, tll;
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uint64_t ldlen;
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int i, ret;
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ret = DW_DLE_NONE;
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if ((ds = _dwarf_find_section(dbg, ".debug_loc")) == 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 (lloff >= ds->ds_size) {
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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 ((ll = malloc(sizeof(struct _Dwarf_Loclist))) == 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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ll->ll_offset = lloff;
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/* Get the number of locdesc the first round. */
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ret = _dwarf_loclist_add_locdesc(dbg, cu, ds, &lloff, NULL, &ldlen,
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NULL, error);
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if (ret != DW_DLE_NONE)
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goto fail_cleanup;
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/*
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* Dwarf_Locdesc list memory is allocated in this way (one more level
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* of indirect) to make the loclist API be compatible with SGI libdwarf.
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*/
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ll->ll_ldlen = ldlen;
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if (ldlen != 0) {
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if ((ll->ll_ldlist = calloc(ldlen, sizeof(Dwarf_Locdesc *))) ==
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NULL) {
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DWARF_SET_ERROR(dbg, error, DW_DLE_MEMORY);
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ret = DW_DLE_MEMORY;
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goto fail_cleanup;
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}
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for (i = 0; (uint64_t) i < ldlen; i++) {
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if ((ll->ll_ldlist[i] =
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calloc(1, sizeof(Dwarf_Locdesc))) == NULL) {
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DWARF_SET_ERROR(dbg, error, DW_DLE_MEMORY);
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ret = DW_DLE_MEMORY;
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goto fail_cleanup;
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}
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}
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} else
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ll->ll_ldlist = NULL;
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lloff = ll->ll_offset;
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/* Fill in locdesc. */
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ret = _dwarf_loclist_add_locdesc(dbg, cu, ds, &lloff, ll->ll_ldlist,
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NULL, &ll->ll_length, error);
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if (ret != DW_DLE_NONE)
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goto fail_cleanup;
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/* Insert to the queue. Sort by offset. */
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TAILQ_FOREACH(tll, &dbg->dbg_loclist, ll_next)
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if (tll->ll_offset > ll->ll_offset) {
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TAILQ_INSERT_BEFORE(tll, ll, ll_next);
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break;
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}
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if (tll == NULL)
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TAILQ_INSERT_TAIL(&dbg->dbg_loclist, ll, ll_next);
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*ret_ll = ll;
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return (DW_DLE_NONE);
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fail_cleanup:
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_dwarf_loclist_free(ll);
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return (ret);
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}
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void
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_dwarf_loclist_free(Dwarf_Loclist ll)
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{
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int i;
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if (ll == NULL)
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return;
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if (ll->ll_ldlist != NULL) {
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for (i = 0; i < ll->ll_ldlen; i++) {
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if (ll->ll_ldlist[i]->ld_s)
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free(ll->ll_ldlist[i]->ld_s);
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free(ll->ll_ldlist[i]);
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}
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free(ll->ll_ldlist);
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}
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free(ll);
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}
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void
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_dwarf_loclist_cleanup(Dwarf_Debug dbg)
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{
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Dwarf_Loclist ll, tll;
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assert(dbg != NULL && dbg->dbg_mode == DW_DLC_READ);
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TAILQ_FOREACH_SAFE(ll, &dbg->dbg_loclist, ll_next, tll) {
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TAILQ_REMOVE(&dbg->dbg_loclist, ll, ll_next);
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_dwarf_loclist_free(ll);
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}
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}
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