OpenCores
URL https://opencores.org/ocsvn/openrisc/openrisc/trunk

Subversion Repositories openrisc

[/] [openrisc/] [trunk/] [gnu-stable/] [gcc-4.5.1/] [gcc/] [mkmap-symver.awk] - Blame information for rev 859

Go to most recent revision | Details | Compare with Previous | View Log

Line No. Rev Author Line
1 280 jeremybenn
# Generate an ELF symbol version map a-la Solaris and GNU ld.
2
#       Copyright (C) 2007, 2008  Free Software Foundation, Inc.
3
#       Contributed by Richard Henderson <rth@cygnus.com>
4
#
5
# This file is part of GCC.
6
#
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
9
# Software Foundation; either version 3, or (at your option) any later
10
# version.
11
#
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.
16
#
17
# You should have received a copy of the GNU General Public License
18
# along with GCC; see the file COPYING3.  If not see
19
# <http://www.gnu.org/licenses/>.
20
 
21
BEGIN {
22
  state = "nm";
23
  sawsymbol = 0;
24
  if (leading_underscore)
25
    prefix = "_";
26
  else
27
    prefix = "";
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
36
# so that we can not emit them into the final version script -- Solaris
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 {
49
  split ($3, s, "@")
50
  def[s[1]] = 1;
51
  sawsymbol = 1;
52
  next;
53
}
54
 
55
state == "nm" {
56
  next;
57
}
58
 
59
# Now we process a simplified variant of the Solaris symbol version
60
# script.  We have one symbol per line, no semicolons, simple markers
61
# for beginning and ending each section, and %inherit markers for
62
# describing version inheritance.  A symbol may appear in more than
63
# one symbol version, and the last seen takes effect.
64
# The magic version name '%exclude' causes all the symbols given that
65
# version to be dropped from the output (unless a later version overrides).
66
 
67
NF == 3 && $1 == "%inherit" {
68
  inherit[$2] = $3;
69
  next;
70
}
71
 
72
NF == 2 && $2 == "{" {
73
  if ($1 != "%exclude")
74
    libs[$1] = 1;
75
  thislib = $1;
76
  next;
77
}
78
 
79
$1 == "}" {
80
  thislib = "";
81
  next;
82
}
83
 
84
{
85
  sym = prefix $1;
86
  symbols[sym] = 1
87
  if (thislib != "%exclude")
88
    ver[sym, thislib] = 1;
89
  else {
90
    for (l in libs)
91
      ver[sym, l] = 0;
92
  }
93
  next;
94
}
95
 
96
END {
97
  if (!sawsymbol)
98
    {
99
      print "No symbols seen -- broken or mis-installed nm?" | "cat 1>&2";
100
      exit 1;
101
    }
102
  for (l in libs)
103
    output(l);
104
}
105
 
106
function output(lib) {
107
  if (done[lib])
108
    return;
109
  done[lib] = 1;
110
  if (inherit[lib])
111
    output(inherit[lib]);
112
 
113
  empty=1
114
  for (sym in symbols)
115
    if ((ver[sym, lib] != 0) && (sym in def))
116
      {
117
        if (empty)
118
          {
119
            printf("%s {\n", lib);
120
            printf("  global:\n");
121
            empty = 0;
122
          }
123
        printf("\t%s;\n", sym);
124
      }
125
 
126
  if (empty)
127
    {
128
      for (l in libs)
129
        if (inherit[l] == lib)
130
          inherit[l] = inherit[lib];
131
    }
132
  else if (inherit[lib])
133
    printf("} %s;\n", inherit[lib]);
134
  else
135
    printf ("\n  local:\n\t*;\n};\n");
136
}

powered by: WebSVN 2.1.0

© copyright 1999-2024 OpenCores.org, equivalent to Oliscience, all rights reserved. OpenCores®, registered trademark.