libelf_data.c revision 367466 
1/*-
2 * Copyright (c) 2006,2008 Joseph Koshy
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
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.
13 *
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
24 * SUCH DAMAGE.
25 */
26
27#include <libelf.h>
28
29#include "_libelf.h"
30
31ELFTC_VCSID("$Id: libelf_data.c 3737 2019-05-05 14:49:50Z jkoshy $");
32
33int
34_libelf_xlate_shtype(uint32_t sht)
35{
36	/*
37	 * Look for known section types.
38	 */
39	switch (sht) {
40	case SHT_DYNAMIC:
41		return (ELF_T_DYN);
42	case SHT_DYNSYM:
43		return (ELF_T_SYM);
44	case SHT_FINI_ARRAY:
45		return (ELF_T_ADDR);
46	case SHT_GNU_HASH:
47		return (ELF_T_GNUHASH);
48	case SHT_GNU_LIBLIST:
49		return (ELF_T_WORD);
50	case SHT_GROUP:
51		return (ELF_T_WORD);
52	case SHT_HASH:
53		return (ELF_T_WORD);
54	case SHT_INIT_ARRAY:
55		return (ELF_T_ADDR);
56	case SHT_NOBITS:
57		return (ELF_T_BYTE);
58	case SHT_NOTE:
59		return (ELF_T_NOTE);
60	case SHT_PREINIT_ARRAY:
61		return (ELF_T_ADDR);
62	case SHT_PROGBITS:
63		return (ELF_T_BYTE);
64	case SHT_REL:
65		return (ELF_T_REL);
66	case SHT_RELA:
67		return (ELF_T_RELA);
68	case SHT_STRTAB:
69		return (ELF_T_BYTE);
70	case SHT_SYMTAB:
71		return (ELF_T_SYM);
72	case SHT_SYMTAB_SHNDX:
73		return (ELF_T_WORD);
74	case SHT_SUNW_dof:
75		return (ELF_T_BYTE);
76	case SHT_SUNW_move:
77		return (ELF_T_MOVE);
78	case SHT_SUNW_syminfo:
79		return (ELF_T_SYMINFO);
80	case SHT_SUNW_verdef:	/* == SHT_GNU_verdef */
81		return (ELF_T_VDEF);
82	case SHT_SUNW_verneed:	/* == SHT_GNU_verneed */
83		return (ELF_T_VNEED);
84	case SHT_SUNW_versym:	/* == SHT_GNU_versym */
85		return (ELF_T_HALF);
86	default:
87		/*
88		 * Values in the range [SHT_LOOS..SHT_HIUSER] (i.e.,
89		 * OS, processor and user-defined section types) are
90		 * legal, but since we do not know anything more about
91		 * their semantics, we return a type of ELF_T_BYTE.
92		 *
93		 * The ELF specification uses 32 bit unsigned values for
94		 * denoting section types, and defines SHT_HIUSER to be
95		 * 0xFFFFFFFFUL (i.e., UINT32_MAX). Consequently, we only
96		 * need to check that 'sht' is greater than or equal to
97		 * SHT_LOOS.
98		 */
99		if (sht >= SHT_LOOS)
100			return (ELF_T_BYTE);
101
102		/*
103		 * Other values are unsupported.
104		 */
105		return (-1);
106	}
107}
108