gold/target.cc

   1 // target.cc
   2
   3 // Copyright 2009 Free Software Foundation, Inc.
   4 // Written by Doug Kwan <dougkwan@google.com>.
   5
   6 // This file is part of gold.
   7
   8 // This program is free software; you can redistribute it and/or modify
   9 // it under the terms of the GNU General Public License as published by
  10 // the Free Software Foundation; either version 3 of the License, or
  11 // (at your option) any later version.
  12
  13 // This program is distributed in the hope that it will be useful,
  14 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 // GNU General Public License for more details.
  17
  18 // You should have received a copy of the GNU General Public License
  19 // along with this program; if not, write to the Free Software
  20 // Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
  21 // MA 02110-1301, USA.
  22
  23 #include "gold.h"
  24 #include "target.h"
  25
  26 namespace gold
  27 {
  28
  29 // Return whether NAME is a local label name.  This is used to implement the
  30 // --discard-locals options and can be overriden by children classes to
  31 // implement system-specific behaviour.  The logic here is the same as that
  32 // in _bfd_elf_is_local_label_name().
  33
  34 bool
  35 Target::do_is_local_label_name (const char* name) const
  36 {
  37   // Normal local symbols start with ``.L''.
  38   if (name[0] == '.' && name[1] == 'L')
  39     return true;
  40
  41   // At least some SVR4 compilers (e.g., UnixWare 2.1 cc) generate
  42   // DWARF debugging symbols starting with ``..''.
  43   if (name[0] == '.' && name[1] == '.')
  44     return true;
  45
  46   // gcc will sometimes generate symbols beginning with ``_.L_'' when
  47   // emitting DWARF debugging output.  I suspect this is actually a
  48   // small bug in gcc (it calls ASM_OUTPUT_LABEL when it should call
  49   // ASM_GENERATE_INTERNAL_LABEL, and this causes the leading
  50   // underscore to be emitted on some ELF targets).  For ease of use,
  51   // we treat such symbols as local.
  52   if (name[0] == '_' && name[1] == '.' && name[2] == 'L' && name[3] == '_')
  53     return true;
  54
  55   return false;
  56 }
  57
  58 } // End namespace gold.