xref: /netbsd-src/external/bsd/elftoolchain/dist/libdwarf/dwarf_attr.c (revision 5ac3bc719ce6e70593039505b491894133237d12)
1*5ac3bc71Schristos /*	$NetBSD: dwarf_attr.c,v 1.5 2024/03/03 17:37:30 christos Exp $	*/
2e81373b4Schristos 
39dd9d0cfSchristos /*-
49dd9d0cfSchristos  * Copyright (c) 2007 John Birrell (jb@freebsd.org)
59dd9d0cfSchristos  * Copyright (c) 2009 Kai Wang
69dd9d0cfSchristos  * All rights reserved.
79dd9d0cfSchristos  *
89dd9d0cfSchristos  * Redistribution and use in source and binary forms, with or without
99dd9d0cfSchristos  * modification, are permitted provided that the following conditions
109dd9d0cfSchristos  * are met:
119dd9d0cfSchristos  * 1. Redistributions of source code must retain the above copyright
129dd9d0cfSchristos  *    notice, this list of conditions and the following disclaimer.
139dd9d0cfSchristos  * 2. Redistributions in binary form must reproduce the above copyright
149dd9d0cfSchristos  *    notice, this list of conditions and the following disclaimer in the
159dd9d0cfSchristos  *    documentation and/or other materials provided with the distribution.
169dd9d0cfSchristos  *
179dd9d0cfSchristos  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
189dd9d0cfSchristos  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
199dd9d0cfSchristos  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
209dd9d0cfSchristos  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
219dd9d0cfSchristos  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
229dd9d0cfSchristos  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
239dd9d0cfSchristos  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
249dd9d0cfSchristos  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
259dd9d0cfSchristos  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
269dd9d0cfSchristos  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
279dd9d0cfSchristos  * SUCH DAMAGE.
289dd9d0cfSchristos  */
299dd9d0cfSchristos 
309dd9d0cfSchristos #include "_libdwarf.h"
319dd9d0cfSchristos 
32*5ac3bc71Schristos __RCSID("$NetBSD: dwarf_attr.c,v 1.5 2024/03/03 17:37:30 christos Exp $");
3342bd3019Schristos ELFTC_VCSID("Id: dwarf_attr.c 3064 2014-06-06 19:35:55Z kaiwang27");
349dd9d0cfSchristos 
359dd9d0cfSchristos int
dwarf_attr(Dwarf_Die die,Dwarf_Half attr,Dwarf_Attribute * atp,Dwarf_Error * error)369dd9d0cfSchristos dwarf_attr(Dwarf_Die die, Dwarf_Half attr, Dwarf_Attribute *atp,
379dd9d0cfSchristos     Dwarf_Error *error)
389dd9d0cfSchristos {
399dd9d0cfSchristos 	Dwarf_Debug dbg;
409dd9d0cfSchristos 	Dwarf_Attribute at;
419dd9d0cfSchristos 
429dd9d0cfSchristos 	dbg = die != NULL ? die->die_dbg : NULL;
439dd9d0cfSchristos 
449dd9d0cfSchristos 	if (die == NULL || atp == NULL) {
459dd9d0cfSchristos 		DWARF_SET_ERROR(dbg, error, DW_DLE_ARGUMENT);
469dd9d0cfSchristos 		return (DW_DLV_ERROR);
479dd9d0cfSchristos 	}
489dd9d0cfSchristos 
499dd9d0cfSchristos 	if ((at = _dwarf_attr_find(die, attr)) == NULL) {
509dd9d0cfSchristos 		DWARF_SET_ERROR(dbg, error, DW_DLE_NO_ENTRY);
519dd9d0cfSchristos 		return (DW_DLV_NO_ENTRY);
529dd9d0cfSchristos 	}
539dd9d0cfSchristos 
549dd9d0cfSchristos 	*atp = at;
559dd9d0cfSchristos 
569dd9d0cfSchristos 	return (DW_DLV_OK);
579dd9d0cfSchristos }
589dd9d0cfSchristos 
599dd9d0cfSchristos int
dwarf_attrlist(Dwarf_Die die,Dwarf_Attribute ** attrbuf,Dwarf_Signed * attrcount,Dwarf_Error * error)609dd9d0cfSchristos dwarf_attrlist(Dwarf_Die die, Dwarf_Attribute **attrbuf,
619dd9d0cfSchristos     Dwarf_Signed *attrcount, Dwarf_Error *error)
629dd9d0cfSchristos {
639dd9d0cfSchristos 	Dwarf_Attribute at;
649dd9d0cfSchristos 	Dwarf_Debug dbg;
659dd9d0cfSchristos 	int i;
669dd9d0cfSchristos 
679dd9d0cfSchristos 	dbg = die != NULL ? die->die_dbg : NULL;
689dd9d0cfSchristos 
699dd9d0cfSchristos 	if (die == NULL || attrbuf == NULL || attrcount == NULL) {
709dd9d0cfSchristos 		DWARF_SET_ERROR(dbg, error, DW_DLE_ARGUMENT);
719dd9d0cfSchristos 		return (DW_DLV_ERROR);
729dd9d0cfSchristos 	}
739dd9d0cfSchristos 
749dd9d0cfSchristos 	if (die->die_ab->ab_atnum == 0) {
759dd9d0cfSchristos 		DWARF_SET_ERROR(dbg, error, DW_DLE_NO_ENTRY);
769dd9d0cfSchristos 		return (DW_DLV_NO_ENTRY);
779dd9d0cfSchristos 	}
789dd9d0cfSchristos 
799dd9d0cfSchristos 	*attrcount = die->die_ab->ab_atnum;
809dd9d0cfSchristos 
819dd9d0cfSchristos 	if (die->die_attrarray != NULL) {
829dd9d0cfSchristos 		*attrbuf = die->die_attrarray;
839dd9d0cfSchristos 		return (DW_DLV_OK);
849dd9d0cfSchristos 	}
859dd9d0cfSchristos 
869dd9d0cfSchristos 	if ((die->die_attrarray = malloc(*attrcount * sizeof(Dwarf_Attribute)))
879dd9d0cfSchristos 	    == NULL) {
889dd9d0cfSchristos 		DWARF_SET_ERROR(dbg, error, DW_DLE_MEMORY);
899dd9d0cfSchristos 		return (DW_DLV_ERROR);
909dd9d0cfSchristos 	}
919dd9d0cfSchristos 
929dd9d0cfSchristos 	for (i = 0, at = STAILQ_FIRST(&die->die_attr);
939dd9d0cfSchristos 	     i < *attrcount && at != NULL; i++, at = STAILQ_NEXT(at, at_next))
949dd9d0cfSchristos 		die->die_attrarray[i] = at;
959dd9d0cfSchristos 
969dd9d0cfSchristos 	*attrbuf = die->die_attrarray;
979dd9d0cfSchristos 
989dd9d0cfSchristos 	return (DW_DLV_OK);
999dd9d0cfSchristos }
1009dd9d0cfSchristos 
1019dd9d0cfSchristos int
dwarf_hasattr(Dwarf_Die die,Dwarf_Half attr,Dwarf_Bool * ret_bool,Dwarf_Error * error)1029dd9d0cfSchristos dwarf_hasattr(Dwarf_Die die, Dwarf_Half attr, Dwarf_Bool *ret_bool,
1039dd9d0cfSchristos     Dwarf_Error *error)
1049dd9d0cfSchristos {
1059dd9d0cfSchristos 	Dwarf_Debug dbg;
1069dd9d0cfSchristos 
1079dd9d0cfSchristos 	dbg = die != NULL ? die->die_dbg : NULL;
1089dd9d0cfSchristos 
1099dd9d0cfSchristos 	if (die == NULL || ret_bool == NULL) {
1109dd9d0cfSchristos 		DWARF_SET_ERROR(dbg, error, DW_DLE_ARGUMENT);
1119dd9d0cfSchristos 		return (DW_DLV_ERROR);
1129dd9d0cfSchristos 	}
1139dd9d0cfSchristos 
1149dd9d0cfSchristos 	*ret_bool = (_dwarf_attr_find(die, attr) != NULL);
1159dd9d0cfSchristos 
1169dd9d0cfSchristos 	return (DW_DLV_OK);
1179dd9d0cfSchristos }
1189dd9d0cfSchristos 
1199dd9d0cfSchristos int
dwarf_attroffset(Dwarf_Attribute at,Dwarf_Off * ret_off,Dwarf_Error * error)12042bd3019Schristos dwarf_attroffset(Dwarf_Attribute at, Dwarf_Off *ret_off, Dwarf_Error *error)
12142bd3019Schristos {
12242bd3019Schristos 	Dwarf_Debug dbg;
12342bd3019Schristos 
12442bd3019Schristos 	dbg = at != NULL ? at->at_die->die_dbg : NULL;
12542bd3019Schristos 
12642bd3019Schristos 	if (at == NULL || ret_off == NULL) {
12742bd3019Schristos 		DWARF_SET_ERROR(dbg, error, DW_DLE_ARGUMENT);
12842bd3019Schristos 		return (DW_DLV_ERROR);
12942bd3019Schristos 	}
13042bd3019Schristos 
13142bd3019Schristos 	*ret_off = at->at_offset;
13242bd3019Schristos 
13342bd3019Schristos 	return (DW_DLV_OK);
13442bd3019Schristos }
13542bd3019Schristos 
13642bd3019Schristos int
dwarf_lowpc(Dwarf_Die die,Dwarf_Addr * ret_lowpc,Dwarf_Error * error)1379dd9d0cfSchristos dwarf_lowpc(Dwarf_Die die, Dwarf_Addr *ret_lowpc, Dwarf_Error *error)
1389dd9d0cfSchristos {
1399dd9d0cfSchristos 	Dwarf_Attribute at;
1409dd9d0cfSchristos 	Dwarf_Debug dbg;
1419dd9d0cfSchristos 
1429dd9d0cfSchristos 	dbg = die != NULL ? die->die_dbg : NULL;
1439dd9d0cfSchristos 
1449dd9d0cfSchristos 	if (die == NULL || ret_lowpc == NULL) {
1459dd9d0cfSchristos 		DWARF_SET_ERROR(dbg, error, DW_DLE_ARGUMENT);
1469dd9d0cfSchristos 		return (DW_DLV_ERROR);
1479dd9d0cfSchristos 	}
1489dd9d0cfSchristos 
1499dd9d0cfSchristos 	if ((at = _dwarf_attr_find(die, DW_AT_low_pc)) == NULL) {
1509dd9d0cfSchristos 		DWARF_SET_ERROR(dbg, error, DW_DLE_NO_ENTRY);
1519dd9d0cfSchristos 		return (DW_DLV_NO_ENTRY);
1529dd9d0cfSchristos 	}
1539dd9d0cfSchristos 
1549dd9d0cfSchristos 	*ret_lowpc = at->u[0].u64;
1559dd9d0cfSchristos 
1569dd9d0cfSchristos 	return (DW_DLV_OK);
1579dd9d0cfSchristos }
1589dd9d0cfSchristos 
1599dd9d0cfSchristos int
dwarf_highpc(Dwarf_Die die,Dwarf_Addr * ret_highpc,Dwarf_Error * error)1609dd9d0cfSchristos dwarf_highpc(Dwarf_Die die, Dwarf_Addr *ret_highpc, Dwarf_Error *error)
1619dd9d0cfSchristos {
16242bd3019Schristos 
16342bd3019Schristos 	return (dwarf_highpc_b(die, ret_highpc, NULL, NULL, error));
16442bd3019Schristos }
16542bd3019Schristos 
16642bd3019Schristos int
dwarf_highpc_b(Dwarf_Die die,Dwarf_Addr * ret_highpc,Dwarf_Half * ret_form,enum Dwarf_Form_Class * ret_class,Dwarf_Error * error)16742bd3019Schristos dwarf_highpc_b(Dwarf_Die die, Dwarf_Addr *ret_highpc, Dwarf_Half *ret_form,
16842bd3019Schristos     enum Dwarf_Form_Class *ret_class, Dwarf_Error *error)
16942bd3019Schristos {
1709dd9d0cfSchristos 	Dwarf_Attribute at;
1719dd9d0cfSchristos 	Dwarf_Debug dbg;
17242bd3019Schristos 	Dwarf_CU cu;
1739dd9d0cfSchristos 
1749dd9d0cfSchristos 	dbg = die != NULL ? die->die_dbg : NULL;
1759dd9d0cfSchristos 
1769dd9d0cfSchristos 	if (die == NULL || ret_highpc == NULL) {
1779dd9d0cfSchristos 		DWARF_SET_ERROR(dbg, error, DW_DLE_ARGUMENT);
1789dd9d0cfSchristos 		return (DW_DLV_ERROR);
1799dd9d0cfSchristos 	}
1809dd9d0cfSchristos 
1819dd9d0cfSchristos 	if ((at = _dwarf_attr_find(die, DW_AT_high_pc)) == NULL) {
1829dd9d0cfSchristos 		DWARF_SET_ERROR(dbg, error, DW_DLE_NO_ENTRY);
1839dd9d0cfSchristos 		return (DW_DLV_NO_ENTRY);
1849dd9d0cfSchristos 	}
1859dd9d0cfSchristos 
1869dd9d0cfSchristos 	*ret_highpc = at->u[0].u64;
1879dd9d0cfSchristos 
18842bd3019Schristos 	if (ret_form != NULL) {
18942bd3019Schristos 		*ret_form = at->at_form;
19042bd3019Schristos 	}
19142bd3019Schristos 
19242bd3019Schristos 	if (ret_class != NULL) {
19342bd3019Schristos 		cu = die->die_cu;
19442bd3019Schristos 		*ret_class = dwarf_get_form_class(cu->cu_version,
19542bd3019Schristos 		    DW_AT_high_pc, cu->cu_length_size == 4 ? 4 : 8,
19642bd3019Schristos 		    at->at_form);
19742bd3019Schristos 	}
19842bd3019Schristos 
1999dd9d0cfSchristos 	return (DW_DLV_OK);
2009dd9d0cfSchristos }
2019dd9d0cfSchristos 
2029dd9d0cfSchristos int
dwarf_bytesize(Dwarf_Die die,Dwarf_Unsigned * ret_size,Dwarf_Error * error)2039dd9d0cfSchristos dwarf_bytesize(Dwarf_Die die, Dwarf_Unsigned *ret_size, Dwarf_Error *error)
2049dd9d0cfSchristos {
2059dd9d0cfSchristos 	Dwarf_Attribute at;
2069dd9d0cfSchristos 	Dwarf_Debug dbg;
2079dd9d0cfSchristos 
2089dd9d0cfSchristos 	dbg = die != NULL ? die->die_dbg : NULL;
2099dd9d0cfSchristos 
2109dd9d0cfSchristos 	if (die == NULL || ret_size == NULL) {
2119dd9d0cfSchristos 		DWARF_SET_ERROR(dbg, error, DW_DLE_ARGUMENT);
2129dd9d0cfSchristos 		return (DW_DLV_ERROR);
2139dd9d0cfSchristos 	}
2149dd9d0cfSchristos 
2159dd9d0cfSchristos 	if ((at = _dwarf_attr_find(die, DW_AT_byte_size)) == NULL) {
2169dd9d0cfSchristos 		DWARF_SET_ERROR(dbg, error, DW_DLE_NO_ENTRY);
2179dd9d0cfSchristos 		return (DW_DLV_NO_ENTRY);
2189dd9d0cfSchristos 	}
2199dd9d0cfSchristos 
2209dd9d0cfSchristos 	*ret_size = at->u[0].u64;
2219dd9d0cfSchristos 
2229dd9d0cfSchristos 	return (DW_DLV_OK);
2239dd9d0cfSchristos }
2249dd9d0cfSchristos 
2259dd9d0cfSchristos int
dwarf_bitsize(Dwarf_Die die,Dwarf_Unsigned * ret_size,Dwarf_Error * error)2269dd9d0cfSchristos dwarf_bitsize(Dwarf_Die die, Dwarf_Unsigned *ret_size, Dwarf_Error *error)
2279dd9d0cfSchristos {
2289dd9d0cfSchristos 	Dwarf_Attribute at;
2299dd9d0cfSchristos 	Dwarf_Debug dbg;
2309dd9d0cfSchristos 
2319dd9d0cfSchristos 	dbg = die != NULL ? die->die_dbg : NULL;
2329dd9d0cfSchristos 
2339dd9d0cfSchristos 	if (die == NULL || ret_size == NULL) {
2349dd9d0cfSchristos 		DWARF_SET_ERROR(dbg, error, DW_DLE_ARGUMENT);
2359dd9d0cfSchristos 		return (DW_DLV_ERROR);
2369dd9d0cfSchristos 	}
2379dd9d0cfSchristos 
2389dd9d0cfSchristos 	if ((at = _dwarf_attr_find(die, DW_AT_bit_size)) == NULL) {
2399dd9d0cfSchristos 		DWARF_SET_ERROR(dbg, error, DW_DLE_NO_ENTRY);
2409dd9d0cfSchristos 		return (DW_DLV_NO_ENTRY);
2419dd9d0cfSchristos 	}
2429dd9d0cfSchristos 
2439dd9d0cfSchristos 	*ret_size = at->u[0].u64;
2449dd9d0cfSchristos 
2459dd9d0cfSchristos 	return (DW_DLV_OK);
2469dd9d0cfSchristos }
2479dd9d0cfSchristos 
2489dd9d0cfSchristos int
dwarf_bitoffset(Dwarf_Die die,Dwarf_Unsigned * ret_size,Dwarf_Error * error)2499dd9d0cfSchristos dwarf_bitoffset(Dwarf_Die die, Dwarf_Unsigned *ret_size, Dwarf_Error *error)
2509dd9d0cfSchristos {
2519dd9d0cfSchristos 	Dwarf_Attribute at;
2529dd9d0cfSchristos 	Dwarf_Debug dbg;
2539dd9d0cfSchristos 
2549dd9d0cfSchristos 	dbg = die != NULL ? die->die_dbg : NULL;
2559dd9d0cfSchristos 
2569dd9d0cfSchristos 	if (die == NULL || ret_size == NULL) {
2579dd9d0cfSchristos 		DWARF_SET_ERROR(dbg, error, DW_DLE_ARGUMENT);
2589dd9d0cfSchristos 		return (DW_DLV_ERROR);
2599dd9d0cfSchristos 	}
2609dd9d0cfSchristos 
2619dd9d0cfSchristos 	if ((at = _dwarf_attr_find(die, DW_AT_bit_offset)) == NULL) {
2629dd9d0cfSchristos 		DWARF_SET_ERROR(dbg, error, DW_DLE_NO_ENTRY);
2639dd9d0cfSchristos 		return (DW_DLV_NO_ENTRY);
2649dd9d0cfSchristos 	}
2659dd9d0cfSchristos 
2669dd9d0cfSchristos 	*ret_size = at->u[0].u64;
2679dd9d0cfSchristos 
2689dd9d0cfSchristos 	return (DW_DLV_OK);
2699dd9d0cfSchristos }
2709dd9d0cfSchristos 
2719dd9d0cfSchristos int
dwarf_srclang(Dwarf_Die die,Dwarf_Unsigned * ret_lang,Dwarf_Error * error)2729dd9d0cfSchristos dwarf_srclang(Dwarf_Die die, Dwarf_Unsigned *ret_lang, Dwarf_Error *error)
2739dd9d0cfSchristos {
2749dd9d0cfSchristos 	Dwarf_Attribute at;
2759dd9d0cfSchristos 	Dwarf_Debug dbg;
2769dd9d0cfSchristos 
2779dd9d0cfSchristos 	dbg = die != NULL ? die->die_dbg : NULL;
2789dd9d0cfSchristos 
2799dd9d0cfSchristos 	if (die == NULL || ret_lang == NULL) {
2809dd9d0cfSchristos 		DWARF_SET_ERROR(dbg, error, DW_DLE_ARGUMENT);
2819dd9d0cfSchristos 		return (DW_DLV_ERROR);
2829dd9d0cfSchristos 	}
2839dd9d0cfSchristos 
2849dd9d0cfSchristos 	if ((at = _dwarf_attr_find(die, DW_AT_language)) == NULL) {
2859dd9d0cfSchristos 		DWARF_SET_ERROR(dbg, error, DW_DLE_NO_ENTRY);
2869dd9d0cfSchristos 		return (DW_DLV_NO_ENTRY);
2879dd9d0cfSchristos 	}
2889dd9d0cfSchristos 
2899dd9d0cfSchristos 	*ret_lang = at->u[0].u64;
2909dd9d0cfSchristos 
2919dd9d0cfSchristos 	return (DW_DLV_OK);
2929dd9d0cfSchristos }
2939dd9d0cfSchristos 
2949dd9d0cfSchristos int
dwarf_arrayorder(Dwarf_Die die,Dwarf_Unsigned * ret_order,Dwarf_Error * error)2959dd9d0cfSchristos dwarf_arrayorder(Dwarf_Die die, Dwarf_Unsigned *ret_order, Dwarf_Error *error)
2969dd9d0cfSchristos {
2979dd9d0cfSchristos 	Dwarf_Attribute at;
2989dd9d0cfSchristos 	Dwarf_Debug dbg;
2999dd9d0cfSchristos 
3009dd9d0cfSchristos 	dbg = die != NULL ? die->die_dbg : NULL;
3019dd9d0cfSchristos 
3029dd9d0cfSchristos 	if (die == NULL || ret_order == NULL) {
3039dd9d0cfSchristos 		DWARF_SET_ERROR(dbg, error, DW_DLE_ARGUMENT);
3049dd9d0cfSchristos 		return (DW_DLV_ERROR);
3059dd9d0cfSchristos 	}
3069dd9d0cfSchristos 
3079dd9d0cfSchristos 	if ((at = _dwarf_attr_find(die, DW_AT_ordering)) == NULL) {
3089dd9d0cfSchristos 		DWARF_SET_ERROR(dbg, error, DW_DLE_NO_ENTRY);
3099dd9d0cfSchristos 		return (DW_DLV_NO_ENTRY);
3109dd9d0cfSchristos 	}
3119dd9d0cfSchristos 
3129dd9d0cfSchristos 	*ret_order = at->u[0].u64;
3139dd9d0cfSchristos 
3149dd9d0cfSchristos 	return (DW_DLV_OK);
3159dd9d0cfSchristos }
316