xref: /titanic_51/usr/src/cmd/sgs/libconv/common/version.c (revision 853389e344087efe23a5cc688693e5301a1cb90d)
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 /*
29  * String conversion routine for version flag entries.
30  */
31 #include	<stdio.h>
32 #include	"_conv.h"
33 #include	"version_msg.h"
34 
35 const char *
36 conv_ver_flags(Half flags)
37 {
38 	if (flags & VER_FLG_WEAK)
39 		return (MSG_ORIG(MSG_VER_FLG_WEAK));
40 	else if (flags & VER_FLG_BASE)
41 		return (MSG_ORIG(MSG_VER_FLG_BASE));
42 	else
43 		return (MSG_ORIG(MSG_GBL_NULL));
44 }
45 
46 
47 /*
48  * Format a version index as contained in a VERSYM section
49  *
50  * entry:
51  *	verndx - Version index to format
52  *	gnuver - If True (non-zero), the version rules used by the
53  *		GNU ld are assumed. If False (0), Solaris ld rules apply.
54  */
55 const char *
56 conv_ver_index(Versym verndx, int gnuver, Conv_inv_buf_t *inv_buf)
57 {
58 	const char		*fmt;
59 
60 	/* Special case versions starting at VER_NDX_LORESERVE */
61 	if (verndx == VER_NDX_ELIMINATE)
62 		return (MSG_ORIG(MSG_VERSYM_ELIMINATE));
63 
64 	/*
65 	 * The GNU style of versioning uses the top bit of the
66 	 * 16-bit version index (0x8000) as a "hidden bit". A
67 	 * hidden symbol is supposed to be ignored by the linker.
68 	 */
69 	if (gnuver && (verndx & 0x8000)) {
70 		verndx &= ~0x8000;
71 		fmt = MSG_ORIG(MSG_VERSYM_GNUH_FMT);
72 	} else {
73 		fmt = MSG_ORIG(MSG_VERSYM_FMT);
74 	}
75 
76 	/* format as numeric */
77 	(void) snprintf(inv_buf->buf, sizeof (inv_buf->buf),
78 	    fmt, EC_HALF(verndx));
79 	return (inv_buf->buf);
80 }
81