dwarf_ehe.c revision 4734:a4708faa3e85 
1/*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21
22/*
23 * Copyright 2007 Sun Microsystems, Inc.  All rights reserved.
24 * Use is subject to license terms.
25 */
26#pragma ident	"%Z%%M%	%I%	%E% SMI"
27
28#include	<strings.h>
29#include	<dwarf.h>
30#include	"_conv.h"
31#include	<dwarf_ehe_msg.h>
32
33#define	FLAGSZ	MSG_GBL_OSQBRKT_SIZE + \
34		MSG_DWEHE_SLEB128_SIZE + \
35		MSG_DWEHE_INDIRECT_SIZE + \
36		CONV_INV_BUFSIZE + MSG_GBL_CSQBRKT_SIZE
37
38/*
39 * Ensure that Conv_dwarf_ehe_buf_t is large enough:
40 *
41 * FLAGSZ is the real minimum size of the buffer required by conv_dwarf_ehe().
42 * However, Conv_dwarf_ehe_buf_t uses CONV_EHDR_FLAG_BUFSIZE to set the
43 * buffer size. We do things this way because the definition of FLAGSZ uses
44 * information that is not available in the environment of other programs
45 * that include the conv.h header file.
46 */
47#if (CONV_DWARF_EHE_BUFSIZE < FLAGSZ) && !defined(__lint)
48#error "CONV_DWARF_EHE_BUFSIZE is not large enough"
49#endif
50
51const char *
52conv_dwarf_ehe(uint_t flags, Conv_dwarf_ehe_buf_t *dwarf_ehe_buf)
53{
54	char	*buf = dwarf_ehe_buf->buf;
55	size_t	ret = 0;
56
57	(void) strncpy(buf, MSG_ORIG(MSG_GBL_OSQBRKT), FLAGSZ);
58
59	if (flags == DW_EH_PE_omit)
60		ret = strlcat(buf, MSG_ORIG(MSG_DWEHE_OMIT), FLAGSZ);
61	else if (flags == DW_EH_PE_absptr)
62		ret = strlcat(buf, MSG_ORIG(MSG_DWEHE_ABSPTR), FLAGSZ);
63
64	if (ret >= FLAGSZ)
65		return (conv_invalid_val(&dwarf_ehe_buf->inv_buf, flags, 0));
66
67	if ((flags == DW_EH_PE_omit) || (flags == DW_EH_PE_absptr)) {
68		(void) strlcat(buf, MSG_ORIG(MSG_GBL_CSQBRKT), FLAGSZ);
69		return (buf);
70	}
71
72	switch (flags & 0x0f) {
73	case DW_EH_PE_uleb128:
74		ret = strlcat(buf, MSG_ORIG(MSG_DWEHE_ULEB128), FLAGSZ);
75		break;
76	case DW_EH_PE_udata2:
77		ret = strlcat(buf, MSG_ORIG(MSG_DWEHE_UDATA2), FLAGSZ);
78		break;
79	case DW_EH_PE_udata4:
80		ret = strlcat(buf, MSG_ORIG(MSG_DWEHE_UDATA4), FLAGSZ);
81		break;
82	case DW_EH_PE_udata8:
83		ret = strlcat(buf, MSG_ORIG(MSG_DWEHE_UDATA8), FLAGSZ);
84		break;
85	case DW_EH_PE_sleb128:
86		ret = strlcat(buf, MSG_ORIG(MSG_DWEHE_SLEB128), FLAGSZ);
87		break;
88	case DW_EH_PE_sdata2:
89		ret = strlcat(buf, MSG_ORIG(MSG_DWEHE_SDATA2), FLAGSZ);
90		break;
91	case DW_EH_PE_sdata4:
92		ret = strlcat(buf, MSG_ORIG(MSG_DWEHE_SDATA4), FLAGSZ);
93		break;
94	case DW_EH_PE_sdata8:
95		ret = strlcat(buf, MSG_ORIG(MSG_DWEHE_SDATA8), FLAGSZ);
96		break;
97	}
98	if (ret >= FLAGSZ)
99		return (conv_invalid_val(&dwarf_ehe_buf->inv_buf, flags, 0));
100
101	switch (flags & 0xf0) {
102	case DW_EH_PE_pcrel:
103		ret = strlcat(buf, MSG_ORIG(MSG_DWEHE_PCREL), FLAGSZ);
104		break;
105	case DW_EH_PE_textrel:
106		ret = strlcat(buf, MSG_ORIG(MSG_DWEHE_TEXTREL), FLAGSZ);
107		break;
108	case DW_EH_PE_datarel:
109		ret = strlcat(buf, MSG_ORIG(MSG_DWEHE_DATAREL), FLAGSZ);
110		break;
111	case DW_EH_PE_funcrel:
112		ret = strlcat(buf, MSG_ORIG(MSG_DWEHE_FUNCREL), FLAGSZ);
113		break;
114	case DW_EH_PE_aligned:
115		ret = strlcat(buf, MSG_ORIG(MSG_DWEHE_ALIGNED), FLAGSZ);
116		break;
117	case DW_EH_PE_indirect:
118		ret = strlcat(buf, MSG_ORIG(MSG_DWEHE_INDIRECT), FLAGSZ);
119		break;
120	}
121	if (ret >= FLAGSZ)
122		return (conv_invalid_val(&dwarf_ehe_buf->inv_buf, flags, 0));
123
124	(void) strlcat(buf, MSG_ORIG(MSG_GBL_CSQBRKT), FLAGSZ);
125	return (buf);
126}
127