/*-
 * 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: dwarf_pro_attr.c 2074 2011-10-27 03:34:33Z jkoshy $");

Dwarf_P_Attribute
dwarf_add_AT_location_expr(Dwarf_P_Debug dbg, Dwarf_P_Die die, Dwarf_Half attr,
    Dwarf_P_Expr loc_expr, Dwarf_Error *error)
{
	Dwarf_Attribute at;

	if (dbg == NULL || die == NULL || loc_expr == NULL) {
		DWARF_SET_ERROR(dbg, error, DW_DLE_ARGUMENT);
		return (DW_DLV_BADADDR);
	}

	if (_dwarf_attr_alloc(die, &at, error) != DW_DLE_NONE)
		return (DW_DLV_BADADDR);

	at->at_die = die;
	at->at_attrib = attr;
	at->at_expr = loc_expr;

	if (_dwarf_expr_into_block(loc_expr, error) != DW_DLE_NONE) {
		free(at);
		return (DW_DLV_BADADDR);
	}
	at->u[0].u64 = loc_expr->pe_length;
	at->u[1].u8p = loc_expr->pe_block;
	if (loc_expr->pe_length <= UCHAR_MAX)
		at->at_form = DW_FORM_block1;
	else if (loc_expr->pe_length <= USHRT_MAX)
		at->at_form = DW_FORM_block2;
	else if (loc_expr->pe_length <= UINT_MAX)
		at->at_form = DW_FORM_block4;
	else
		at->at_form = DW_FORM_block;

	STAILQ_INSERT_TAIL(&die->die_attr, at, at_next);

	return (at);
}

Dwarf_P_Attribute
dwarf_add_AT_name(Dwarf_P_Die die, char *name, Dwarf_Error *error)
{
	Dwarf_Attribute at;

	if (_dwarf_add_string_attr(die, &at, DW_AT_name, name, error) !=
	    DW_DLE_NONE)
		return (DW_DLV_BADADDR);

	return (at);
}

Dwarf_P_Attribute
dwarf_add_AT_comp_dir(Dwarf_P_Die die, char *dir, Dwarf_Error *error)
{
	Dwarf_Attribute at;

	if (_dwarf_add_string_attr(die, &at, DW_AT_comp_dir, dir, error) !=
	    DW_DLE_NONE)
		return (DW_DLV_BADADDR);

	return (at);
}

Dwarf_P_Attribute
dwarf_add_AT_producer(Dwarf_P_Die die, char *producer, Dwarf_Error *error)
{
	Dwarf_Attribute at;

	if (_dwarf_add_string_attr(die, &at, DW_AT_producer, producer, error) !=
	    DW_DLE_NONE)
		return (DW_DLV_BADADDR);

	return (at);
}

Dwarf_P_Attribute
dwarf_add_AT_const_value_signedint(Dwarf_P_Die die, Dwarf_Signed value,
    Dwarf_Error *error)
{
	Dwarf_Attribute at;
	Dwarf_Debug dbg;

	dbg = die != NULL ? die->die_dbg : NULL;

	if (die == NULL) {
		DWARF_SET_ERROR(dbg, error, DW_DLE_ARGUMENT);
		return (DW_DLV_BADADDR);
	}

	if (_dwarf_attr_alloc(die, &at, error) != DW_DLE_NONE)
		return (DW_DLV_BADADDR);

	at->at_die = die;
	at->at_attrib = DW_AT_const_value;
	at->at_form = DW_FORM_sdata;
	at->u[0].s64 = value;

	STAILQ_INSERT_TAIL(&die->die_attr, at, at_next);

	return (at);
}

Dwarf_P_Attribute
dwarf_add_AT_const_value_unsignedint(Dwarf_P_Die die, Dwarf_Unsigned value,
    Dwarf_Error *error)
{
	Dwarf_Attribute at;
	Dwarf_Debug dbg;

	dbg = die != NULL ? die->die_dbg : NULL;

	if (die == NULL) {
		DWARF_SET_ERROR(dbg, error, DW_DLE_ARGUMENT);
		return (DW_DLV_BADADDR);
	}

	if (_dwarf_attr_alloc(die, &at, error) != DW_DLE_NONE)
		return (DW_DLV_BADADDR);

	at->at_die = die;
	at->at_attrib = DW_AT_const_value;
	at->at_form = DW_FORM_udata;
	at->u[0].u64 = value;

	STAILQ_INSERT_TAIL(&die->die_attr, at, at_next);

	return (at);
}

Dwarf_P_Attribute
dwarf_add_AT_const_value_string(Dwarf_P_Die die, char *string,
    Dwarf_Error *error)
{
	Dwarf_Attribute at;

	if (_dwarf_add_string_attr(die, &at, DW_AT_const_value, string,
	    error) != DW_DLE_NONE)
		return (DW_DLV_BADADDR);

	return (at);
}

Dwarf_P_Attribute
dwarf_add_AT_targ_address(Dwarf_P_Debug dbg, Dwarf_P_Die die, Dwarf_Half attr,
    Dwarf_Unsigned pc_value, Dwarf_Signed sym_index, Dwarf_Error *error)
{

	return (dwarf_add_AT_targ_address_b(dbg, die, attr, pc_value, sym_index,
	    error));
}

Dwarf_P_Attribute
dwarf_add_AT_targ_address_b(Dwarf_P_Debug dbg, Dwarf_P_Die die, Dwarf_Half attr,
    Dwarf_Unsigned pc_value, Dwarf_Unsigned sym_index, Dwarf_Error *error)
{
	Dwarf_Attribute at;

	if (dbg == NULL || die == NULL) {
		DWARF_SET_ERROR(dbg, error, DW_DLE_ARGUMENT);
		return (DW_DLV_BADADDR);
	}

	if (_dwarf_attr_alloc(die, &at, error) != DW_DLE_NONE)
		return (DW_DLV_BADADDR);

	at->at_die = die;
	at->at_attrib = attr;
	at->at_form = DW_FORM_addr;
	at->at_relsym = sym_index;
	at->u[0].u64 = pc_value;

	STAILQ_INSERT_TAIL(&die->die_attr, at, at_next);

	return (at);
}

Dwarf_P_Attribute
dwarf_add_AT_dataref(Dwarf_P_Debug dbg, Dwarf_P_Die die, Dwarf_Half attr,
    Dwarf_Unsigned pc_value, Dwarf_Unsigned sym_index, Dwarf_Error *error)
{
	Dwarf_Attribute at;
	int ret;

	if (dbg == NULL || die == NULL) {
		DWARF_SET_ERROR(dbg, error, DW_DLE_ARGUMENT);
		return (DW_DLV_BADADDR);
	}

	ret = _dwarf_add_AT_dataref(dbg, die, attr, pc_value, sym_index,
	    NULL, &at, error);
	if (ret != DW_DLE_NONE)
		return (DW_DLV_BADADDR);

	return (at);

}

Dwarf_P_Attribute
dwarf_add_AT_ref_address(Dwarf_P_Debug dbg, Dwarf_P_Die die, Dwarf_Half attr,
    Dwarf_Unsigned pc_value, Dwarf_Unsigned sym_index, Dwarf_Error *error)
{
	Dwarf_Attribute at;

	if (dbg == NULL || die == NULL) {
		DWARF_SET_ERROR(dbg, error, DW_DLE_ARGUMENT);
		return (DW_DLV_BADADDR);
	}

	if (_dwarf_attr_alloc(die, &at, error) != DW_DLE_NONE)
		return (DW_DLV_BADADDR);

	at->at_die = die;
	at->at_attrib = attr;
	at->at_form = DW_FORM_ref_addr;
	at->at_relsym = sym_index;
	at->u[0].u64 = pc_value;

	STAILQ_INSERT_TAIL(&die->die_attr, at, at_next);

	return (at);
}

Dwarf_P_Attribute
dwarf_add_AT_unsigned_const(Dwarf_P_Debug dbg, Dwarf_P_Die die, Dwarf_Half attr,
    Dwarf_Unsigned value, Dwarf_Error *error)
{
	Dwarf_Attribute at;

	if (dbg == NULL || die == NULL) {
		DWARF_SET_ERROR(dbg, error, DW_DLE_ARGUMENT);
		return (DW_DLV_BADADDR);
	}

	if (_dwarf_attr_alloc(die, &at, error) != DW_DLE_NONE)
		return (DW_DLV_BADADDR);

	at->at_die = die;
	at->at_attrib = attr;
	at->u[0].u64 = value;

	if (value <= UCHAR_MAX)
		at->at_form = DW_FORM_data1;
	else if (value <= USHRT_MAX)
		at->at_form = DW_FORM_data2;
	else if (value <= UINT_MAX)
		at->at_form = DW_FORM_data4;
	else
		at->at_form = DW_FORM_data8;

	STAILQ_INSERT_TAIL(&die->die_attr, at, at_next);

	return (at);
}

Dwarf_P_Attribute
dwarf_add_AT_signed_const(Dwarf_P_Debug dbg, Dwarf_P_Die die, Dwarf_Half attr,
    Dwarf_Signed value, Dwarf_Error *error)
{
	Dwarf_Attribute at;

	if (dbg == NULL || die == NULL) {
		DWARF_SET_ERROR(dbg, error, DW_DLE_ARGUMENT);
		return (DW_DLV_BADADDR);
	}

	if (_dwarf_attr_alloc(die, &at, error) != DW_DLE_NONE)
		return (DW_DLV_BADADDR);

	at->at_die = die;
	at->at_attrib = attr;
	at->u[0].u64 = value;

	if (value >= SCHAR_MIN && value <= SCHAR_MAX)
		at->at_form = DW_FORM_data1;
	else if (value >= SHRT_MIN && value <= SHRT_MAX)
		at->at_form = DW_FORM_data2;
	else if (value >= INT_MIN && value <= INT_MAX)
		at->at_form = DW_FORM_data4;
	else
		at->at_form = DW_FORM_data8;

	STAILQ_INSERT_TAIL(&die->die_attr, at, at_next);

	return (at);
}

Dwarf_P_Attribute
dwarf_add_AT_reference(Dwarf_P_Debug dbg, Dwarf_P_Die die, Dwarf_Half attr,
    Dwarf_P_Die ref_die, Dwarf_Error *error)
{
	Dwarf_Attribute at;

	if (dbg == NULL || die == NULL) {
		DWARF_SET_ERROR(dbg, error, DW_DLE_ARGUMENT);
		return (DW_DLV_BADADDR);
	}

	if (_dwarf_attr_alloc(die, &at, error) != DW_DLE_NONE)
		return (DW_DLV_BADADDR);

	at->at_die = die;
	at->at_attrib = attr;
	if (dbg->dbg_offset_size == 4)
		at->at_form = DW_FORM_ref4;
	else
		at->at_form = DW_FORM_ref8;

	at->at_refdie = ref_die;

	STAILQ_INSERT_TAIL(&die->die_attr, at, at_next);

	return (at);
}

Dwarf_P_Attribute
dwarf_add_AT_flag(Dwarf_P_Debug dbg, Dwarf_P_Die die, Dwarf_Half attr,
    Dwarf_Small flag, Dwarf_Error *error)
{
	Dwarf_Attribute at;

	if (dbg == NULL || die == NULL) {
		DWARF_SET_ERROR(dbg, error, DW_DLE_ARGUMENT);
		return (DW_DLV_BADADDR);
	}

	if (_dwarf_attr_alloc(die, &at, error) != DW_DLE_NONE)
		return (DW_DLV_BADADDR);

	at->at_die = die;
	at->at_attrib = attr;
	at->at_form = DW_FORM_flag;
	at->u[0].u64 = flag ? 1 : 0;

	STAILQ_INSERT_TAIL(&die->die_attr, at, at_next);

	return (at);
}

Dwarf_P_Attribute
dwarf_add_AT_string(Dwarf_P_Debug dbg, Dwarf_P_Die die, Dwarf_Half attr,
    char *string, Dwarf_Error *error)
{
	Dwarf_Attribute at;

	if (dbg == NULL || die == NULL) {
		DWARF_SET_ERROR(dbg, error, DW_DLE_ARGUMENT);
		return (DW_DLV_BADADDR);
	}

	/* XXX Add DW_FORM_string style string instead? */

	if (_dwarf_add_string_attr(die, &at, attr, string, error) !=
	    DW_DLE_NONE)
		return (DW_DLV_BADADDR);

	return (at);
}