1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
|
# Generate an ELF symbol version map a-la Solaris and GNU ld.
# Copyright (C) 2007-2016 Free Software Foundation, Inc.
# Contributed by Richard Henderson <rth@cygnus.com>
#
# This file is part of GCC.
#
# GCC is free software; you can redistribute it and/or modify it under
# the terms of the GNU General Public License as published by the Free
# Software Foundation; either version 3, or (at your option) any later
# version.
#
# GCC is distributed in the hope that it will be useful, but WITHOUT
# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
# or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
# License for more details.
#
# You should have received a copy of the GNU General Public License
# along with GCC; see the file COPYING3. If not see
# <http://www.gnu.org/licenses/>.
BEGIN {
state = "nm";
sawsymbol = 0;
if (leading_underscore)
prefix = "_";
else
prefix = "";
}
# Remove comment and blank lines.
/^ *#/ || /^ *$/ {
next;
}
# We begin with nm input. Collect the set of symbols that are present
# so that we can not emit them into the final version script -- Solaris
# complains at us if we do.
state == "nm" && /^%%/ {
state = "ver";
next;
}
state == "nm" && ($1 == "U" || $2 == "U") {
next;
}
state == "nm" && NF == 3 {
split ($3, s, "@")
def[s[1]] = 1;
sawsymbol = 1;
next;
}
state == "nm" {
next;
}
# Now we process a simplified variant of the Solaris symbol version
# script. We have one symbol per line, no semicolons, simple markers
# for beginning and ending each section, and %inherit markers for
# describing version inheritance. A symbol may appear in more than
# one symbol version, and the last seen takes effect.
# The magic version name '%exclude' causes all the symbols given that
# version to be dropped from the output (unless a later version overrides).
NF == 3 && $1 == "%inherit" {
inherit[$2] = $3;
next;
}
NF == 2 && $2 == "{" {
if ($1 != "%exclude")
libs[$1] = 1;
thislib = $1;
next;
}
$1 == "}" {
thislib = "";
next;
}
{
sym = prefix $1;
symbols[sym] = 1
if (thislib != "%exclude")
ver[sym, thislib] = 1;
else {
for (l in libs)
ver[sym, l] = 0;
}
next;
}
END {
if (!sawsymbol)
{
print "No symbols seen -- broken or mis-installed nm?" | "cat 1>&2";
exit 1;
}
for (l in libs)
output(l);
}
function output(lib) {
if (done[lib])
return;
done[lib] = 1;
if (inherit[lib])
output(inherit[lib]);
empty=1
for (sym in symbols)
if ((ver[sym, lib] != 0) && (sym in def))
{
if (empty)
{
printf("%s {\n", lib);
printf(" global:\n");
empty = 0;
}
printf("\t%s;\n", sym);
}
if (empty)
{
for (l in libs)
if (inherit[l] == lib)
inherit[l] = inherit[lib];
}
else if (inherit[lib])
printf("} %s;\n", inherit[lib]);
else
printf ("\n local:\n\t*;\n};\n");
}
|
