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83dad10c | 1 | # Generate an ELF symbol version map a-la Solaris and GNU ld. |
83ffe9cd | 2 | # Copyright (C) 2007-2023 Free Software Foundation, Inc. |
83dad10c RH |
3 | # Contributed by Richard Henderson <rth@cygnus.com> |
4 | # | |
1322177d | 5 | # This file is part of GCC. |
83dad10c | 6 | # |
1322177d LB |
7 | # GCC is free software; you can redistribute it and/or modify it under |
8 | # the terms of the GNU General Public License as published by the Free | |
9dcd6f09 | 9 | # Software Foundation; either version 3, or (at your option) any later |
1322177d | 10 | # version. |
83dad10c | 11 | # |
1322177d LB |
12 | # GCC is distributed in the hope that it will be useful, but WITHOUT |
13 | # ANY WARRANTY; without even the implied warranty of MERCHANTABILITY | |
14 | # or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public | |
15 | # License for more details. | |
83dad10c RH |
16 | # |
17 | # You should have received a copy of the GNU General Public License | |
9dcd6f09 NC |
18 | # along with GCC; see the file COPYING3. If not see |
19 | # <http://www.gnu.org/licenses/>. | |
83dad10c RH |
20 | |
21 | BEGIN { | |
22 | state = "nm"; | |
5a5c00af | 23 | sawsymbol = 0; |
7c834753 ZW |
24 | if (leading_underscore) |
25 | prefix = "_"; | |
26 | else | |
27 | prefix = ""; | |
83dad10c RH |
28 | } |
29 | ||
30 | # Remove comment and blank lines. | |
31 | /^ *#/ || /^ *$/ { | |
32 | next; | |
33 | } | |
34 | ||
35 | # We begin with nm input. Collect the set of symbols that are present | |
67914693 | 36 | # so that we cannot emit them into the final version script -- Solaris |
83dad10c RH |
37 | # complains at us if we do. |
38 | ||
39 | state == "nm" && /^%%/ { | |
40 | state = "ver"; | |
41 | next; | |
42 | } | |
43 | ||
44 | state == "nm" && ($1 == "U" || $2 == "U") { | |
45 | next; | |
46 | } | |
47 | ||
48 | state == "nm" && NF == 3 { | |
ff473280 | 49 | split ($3, s, "@") |
7a0d2bce TP |
50 | if (skip_underscore && substr(s[1], 1, 1) == "_") |
51 | symname = substr(s[1], 2); | |
52 | else | |
53 | symname = s[1]; | |
54 | def[symname] = 1; | |
5a5c00af | 55 | sawsymbol = 1; |
83dad10c RH |
56 | next; |
57 | } | |
58 | ||
59 | state == "nm" { | |
60 | next; | |
61 | } | |
62 | ||
63 | # Now we process a simplified variant of the Solaris symbol version | |
64 | # script. We have one symbol per line, no semicolons, simple markers | |
65 | # for beginning and ending each section, and %inherit markers for | |
fa10beec | 66 | # describing version inheritance. A symbol may appear in more than |
83dad10c | 67 | # one symbol version, and the last seen takes effect. |
7c834753 ZW |
68 | # The magic version name '%exclude' causes all the symbols given that |
69 | # version to be dropped from the output (unless a later version overrides). | |
83dad10c RH |
70 | |
71 | NF == 3 && $1 == "%inherit" { | |
72 | inherit[$2] = $3; | |
73 | next; | |
74 | } | |
75 | ||
76 | NF == 2 && $2 == "{" { | |
7c834753 ZW |
77 | if ($1 != "%exclude") |
78 | libs[$1] = 1; | |
83dad10c RH |
79 | thislib = $1; |
80 | next; | |
81 | } | |
82 | ||
83 | $1 == "}" { | |
84 | thislib = ""; | |
85 | next; | |
86 | } | |
87 | ||
88 | { | |
7c834753 | 89 | sym = prefix $1; |
ff473280 | 90 | symbols[sym] = 1 |
7c834753 | 91 | if (thislib != "%exclude") |
ff473280 L |
92 | ver[sym, thislib] = 1; |
93 | else { | |
94 | for (l in libs) | |
95 | ver[sym, l] = 0; | |
96 | } | |
83dad10c RH |
97 | next; |
98 | } | |
99 | ||
100 | END { | |
5a5c00af RH |
101 | if (!sawsymbol) |
102 | { | |
103 | print "No symbols seen -- broken or mis-installed nm?" | "cat 1>&2"; | |
104 | exit 1; | |
105 | } | |
83dad10c RH |
106 | for (l in libs) |
107 | output(l); | |
108 | } | |
109 | ||
110 | function output(lib) { | |
111 | if (done[lib]) | |
112 | return; | |
113 | done[lib] = 1; | |
114 | if (inherit[lib]) | |
115 | output(inherit[lib]); | |
116 | ||
bc93e287 | 117 | empty=1 |
ff473280 L |
118 | for (sym in symbols) |
119 | if ((ver[sym, lib] != 0) && (sym in def)) | |
bac015e7 | 120 | { |
bc93e287 | 121 | if (empty) |
5a5c00af | 122 | { |
bc93e287 | 123 | printf("%s {\n", lib); |
5a5c00af | 124 | printf(" global:\n"); |
bc93e287 | 125 | empty = 0; |
5a5c00af | 126 | } |
bac015e7 | 127 | printf("\t%s;\n", sym); |
bac015e7 | 128 | } |
83dad10c | 129 | |
bc93e287 JJ |
130 | if (empty) |
131 | { | |
132 | for (l in libs) | |
133 | if (inherit[l] == lib) | |
134 | inherit[l] = inherit[lib]; | |
135 | } | |
136 | else if (inherit[lib]) | |
83dad10c RH |
137 | printf("} %s;\n", inherit[lib]); |
138 | else | |
139 | printf ("\n local:\n\t*;\n};\n"); | |
140 | } |