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[/] [open8_urisc/] [trunk/] [gnu/] [binutils/] [gold/] [target-select.cc] - Diff between revs 27 and 159

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// target-select.cc -- select a target for an object file
// target-select.cc -- select a target for an object file
 
 
// Copyright 2006, 2007, 2008, 2009, 2010 Free Software Foundation, Inc.
// Copyright 2006, 2007, 2008, 2009, 2010, 2011 Free Software Foundation, Inc.
// Written by Ian Lance Taylor <iant@google.com>.
// Written by Ian Lance Taylor <iant@google.com>.
 
 
// This file is part of gold.
// This file is part of gold.
 
 
// This program is free software; you can redistribute it and/or modify
// This program is free software; you can redistribute it and/or modify
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// Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
// Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
// MA 02110-1301, USA.
// MA 02110-1301, USA.
 
 
#include "gold.h"
#include "gold.h"
 
 
 
#include <cstdio>
#include <cstring>
#include <cstring>
 
 
#include "elfcpp.h"
#include "elfcpp.h"
 
#include "options.h"
 
#include "parameters.h"
#include "target-select.h"
#include "target-select.h"
 
 
namespace
namespace
{
{
 
 
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// Construct a Target_selector, which means adding it to the linked
// Construct a Target_selector, which means adding it to the linked
// list.  This runs at global constructor time, so we want it to be
// list.  This runs at global constructor time, so we want it to be
// fast.
// fast.
 
 
Target_selector::Target_selector(int machine, int size, bool is_big_endian,
Target_selector::Target_selector(int machine, int size, bool is_big_endian,
                                 const char* bfd_name)
                                 const char* bfd_name, const char* emulation)
  : machine_(machine), size_(size), is_big_endian_(is_big_endian),
  : machine_(machine), size_(size), is_big_endian_(is_big_endian),
    bfd_name_(bfd_name), instantiated_target_(NULL), set_target_once_(this)
    bfd_name_(bfd_name), emulation_(emulation), instantiated_target_(NULL),
 
    set_target_once_(this)
{
{
  this->next_ = target_selectors;
  this->next_ = target_selectors;
  target_selectors = this;
  target_selectors = this;
}
}
 
 
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{
{
  gold_assert(this->instantiated_target_ == NULL);
  gold_assert(this->instantiated_target_ == NULL);
  this->instantiated_target_ = this->do_instantiate_target();
  this->instantiated_target_ = this->do_instantiate_target();
}
}
 
 
 
// If we instantiated TARGET, return the corresponding BFD name.
 
 
 
const char*
 
Target_selector::do_target_bfd_name(const Target* target)
 
{
 
  if (!this->is_our_target(target))
 
    return NULL;
 
  const char* my_bfd_name = this->bfd_name();
 
  gold_assert(my_bfd_name != NULL);
 
  return my_bfd_name;
 
}
 
 
// Find the target for an ELF file.
// Find the target for an ELF file.
 
 
Target*
Target*
select_target(int machine, int size, bool is_big_endian, int osabi,
select_target(int machine, int size, bool is_big_endian, int osabi,
              int abiversion)
              int abiversion)
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// Find a target using a BFD name.  This is used to support the
// Find a target using a BFD name.  This is used to support the
// --oformat option.
// --oformat option.
 
 
Target*
Target*
select_target_by_name(const char* name)
select_target_by_bfd_name(const char* name)
{
{
  for (Target_selector* p = target_selectors; p != NULL; p = p->next())
  for (Target_selector* p = target_selectors; p != NULL; p = p->next())
    {
    {
      const char* pname = p->bfd_name();
      const char* pname = p->bfd_name();
      if (pname == NULL || strcmp(pname, name) == 0)
      if (pname == NULL || strcmp(pname, name) == 0)
        {
        {
          Target* ret = p->recognize_by_name(name);
          Target* ret = p->recognize_by_bfd_name(name);
 
          if (ret != NULL)
 
            return ret;
 
        }
 
    }
 
  return NULL;
 
}
 
 
 
// Find a target using a GNU linker emulation.  This is used to
 
// support the -m option.
 
 
 
Target*
 
select_target_by_emulation(const char* name)
 
{
 
  for (Target_selector* p = target_selectors; p != NULL; p = p->next())
 
    {
 
      const char* pname = p->emulation();
 
      if (pname == NULL || strcmp(pname, name) == 0)
 
        {
 
          Target* ret = p->recognize_by_emulation(name);
          if (ret != NULL)
          if (ret != NULL)
            return ret;
            return ret;
        }
        }
    }
    }
  return NULL;
  return NULL;
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void
void
supported_target_names(std::vector<const char*>* names)
supported_target_names(std::vector<const char*>* names)
{
{
  for (Target_selector* p = target_selectors; p != NULL; p = p->next())
  for (Target_selector* p = target_selectors; p != NULL; p = p->next())
    p->supported_names(names);
    p->supported_bfd_names(names);
 
}
 
 
 
// Push all the supported emulations onto a vector.
 
 
 
void
 
supported_emulation_names(std::vector<const char*>* names)
 
{
 
  for (Target_selector* p = target_selectors; p != NULL; p = p->next())
 
    p->supported_emulations(names);
 
}
 
 
 
// Implement the --print-output-format option.
 
 
 
void
 
print_output_format()
 
{
 
  if (!parameters->target_valid())
 
    {
 
      // This case arises when --print-output-format is used with no
 
      // input files.  We need to come up with the right string to
 
      // print based on the other options.  If the user specified the
 
      // format using a --oformat option, use that.  That saves each
 
      // target from having to remember the name that was used to
 
      // select it.  In other cases, we will just have to ask the
 
      // target.
 
      if (parameters->options().user_set_oformat())
 
        {
 
          const char* bfd_name = parameters->options().oformat();
 
          Target* target = select_target_by_bfd_name(bfd_name);
 
          if (target != NULL)
 
            printf("%s\n", bfd_name);
 
          else
 
            gold_error(_("unrecognized output format %s"), bfd_name);
 
          return;
 
        }
 
 
 
      parameters_force_valid_target();
 
    }
 
 
 
  const Target* target = &parameters->target();
 
  for (Target_selector* p = target_selectors; p != NULL; p = p->next())
 
    {
 
      const char* bfd_name = p->target_bfd_name(target);
 
      if (bfd_name != NULL)
 
        {
 
          printf("%s\n", bfd_name);
 
          return;
 
        }
 
    }
 
 
 
  gold_unreachable();
}
}
 
 
} // End namespace gold.
} // End namespace gold.
 
 
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