freebsd-src/contrib/elftoolchain/libdwarf/dwarf_arange.c

/*-
 * Copyright (c) 2009,2011 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: dwarf_arange.c 2072 2011-10-27 03:26:49Z jkoshy $");

int
dwarf_get_aranges(Dwarf_Debug dbg, Dwarf_Arange **arlist,
    Dwarf_Signed *ret_arange_cnt, Dwarf_Error *error)
{

	if (dbg == NULL || arlist == NULL || ret_arange_cnt == NULL) {
		DWARF_SET_ERROR(dbg, error, DW_DLE_ARGUMENT);
		return (DW_DLV_ERROR);
	}

	if (dbg->dbg_arange_cnt == 0) {
		if (_dwarf_arange_init(dbg, error) != DW_DLE_NONE)
			return (DW_DLV_ERROR);
		if (dbg->dbg_arange_cnt == 0) {
			DWARF_SET_ERROR(dbg, error, DW_DLE_NO_ENTRY);
			return (DW_DLV_NO_ENTRY);
		}
	}

	assert(dbg->dbg_arange_array != NULL);

	*arlist = dbg->dbg_arange_array;
	*ret_arange_cnt = dbg->dbg_arange_cnt;

	return (DW_DLV_OK);
}

int
dwarf_get_arange(Dwarf_Arange *arlist, Dwarf_Unsigned arange_cnt,
    Dwarf_Addr addr, Dwarf_Arange *ret_arange, Dwarf_Error *error)
{
	Dwarf_Arange ar;
	Dwarf_Debug dbg;
	int i;

	if (arlist == NULL) {
		DWARF_SET_ERROR(NULL, error, DW_DLE_ARGUMENT);
		return (DW_DLV_ERROR);
	}

	dbg = (*arlist)->ar_as->as_cu->cu_dbg;

	if (ret_arange == NULL || arange_cnt == 0) {
		DWARF_SET_ERROR(dbg, error, DW_DLE_ARGUMENT);
		return (DW_DLV_ERROR);
	}

	for (i = 0; (Dwarf_Unsigned)i < arange_cnt; i++) {
		ar = arlist[i];
		if (addr >= ar->ar_address && addr < ar->ar_address +
		    ar->ar_range) {
			*ret_arange = ar;
			return (DW_DLV_OK);
		}
	}

	DWARF_SET_ERROR(dbg, error, DW_DLE_NO_ENTRY);

	return (DW_DLV_NO_ENTRY);
}

int
dwarf_get_cu_die_offset(Dwarf_Arange ar, Dwarf_Off *ret_offset,
    Dwarf_Error *error)
{
	Dwarf_CU cu;
	Dwarf_ArangeSet as;

	if (ar == NULL) {
		DWARF_SET_ERROR(NULL, error, DW_DLE_ARGUMENT);
		return (DW_DLV_ERROR);
	}

	as = ar->ar_as;
	assert(as != NULL);
	cu = as->as_cu;
	assert(cu != NULL);

	if (ret_offset == NULL) {
		DWARF_SET_ERROR(cu->cu_dbg, error, DW_DLE_ARGUMENT);
		return (DW_DLV_ERROR);
	}

	*ret_offset = cu->cu_1st_offset;

	return (DW_DLV_OK);
}

int
dwarf_get_arange_cu_header_offset(Dwarf_Arange ar, Dwarf_Off *ret_offset,
    Dwarf_Error *error)
{
	Dwarf_ArangeSet as;

	if (ar == NULL) {
		DWARF_SET_ERROR(NULL, error, DW_DLE_ARGUMENT);
		return (DW_DLV_ERROR);
	}

	as = ar->ar_as;
	assert(as != NULL);

	if (ret_offset == NULL) {
		DWARF_SET_ERROR(as->as_cu->cu_dbg, error, DW_DLE_ARGUMENT);
		return (DW_DLV_ERROR);
	}

	*ret_offset = as->as_cu_offset;

	return (DW_DLV_OK);
}

int
dwarf_get_arange_info(Dwarf_Arange ar, Dwarf_Addr *start,
    Dwarf_Unsigned *length, Dwarf_Off *cu_die_offset, Dwarf_Error *error)
{
	Dwarf_CU cu;
	Dwarf_ArangeSet as;

	if (ar == NULL) {
		DWARF_SET_ERROR(NULL, error, DW_DLE_ARGUMENT);
		return (DW_DLV_ERROR);
	}

	as = ar->ar_as;
	assert(as != NULL);
	cu = as->as_cu;
	assert(cu != NULL);

	if (start == NULL || length == NULL ||
	    cu_die_offset == NULL) {
		DWARF_SET_ERROR(cu->cu_dbg, error, DW_DLE_ARGUMENT);
		return (DW_DLV_ERROR);
	}

	*start = ar->ar_address;
	*length = ar->ar_range;
	*cu_die_offset = cu->cu_1st_offset;

	return (DW_DLV_OK);
}