// readsyms.cc -- read input file symbols for gold
+// Copyright 2006, 2007 Free Software Foundation, Inc.
+// Written by Ian Lance Taylor <iant@google.com>.
+
+// This file is part of gold.
+
+// This program 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 of the License, or
+// (at your option) any later version.
+
+// This program 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 this program; if not, write to the Free Software
+// Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
+// MA 02110-1301, USA.
+
#include "gold.h"
#include <cstring>
// Read enough of the file to pick up the entire ELF header.
- int ehdr_size = elfcpp::Elf_sizes<64>::ehdr_size;
- off_t bytes;
- const unsigned char* p = input_file->file().get_view(0, ehdr_size, &bytes);
- if (bytes >= 4)
+ off_t filesize = input_file->file().filesize();
+
+ if (filesize == 0)
+ {
+ fprintf(stderr, _("%s: %s: file is empty\n"),
+ program_name, input_file->file().filename().c_str());
+ gold_exit(false);
+ }
+
+ unsigned char ehdr_buf[elfcpp::Elf_sizes<64>::ehdr_size];
+
+ int read_size = elfcpp::Elf_sizes<64>::ehdr_size;
+ if (filesize < read_size)
+ read_size = filesize;
+
+ input_file->file().read(0, read_size, ehdr_buf);
+
+ if (read_size >= 4)
{
static unsigned char elfmagic[4] =
{
elfcpp::ELFMAG0, elfcpp::ELFMAG1,
elfcpp::ELFMAG2, elfcpp::ELFMAG3
};
- if (memcmp(p, elfmagic, 4) == 0)
+ if (memcmp(ehdr_buf, elfmagic, 4) == 0)
{
// This is an ELF object.
Object* obj = make_elf_object(input_file->filename(),
- input_file, 0, p, bytes);
+ input_file, 0, ehdr_buf, read_size);
// We don't have a way to record a non-archive in an input
// group. If this is an ordinary object file, we can't
}
}
- if (bytes >= Archive::sarmag)
+ if (read_size >= Archive::sarmag)
{
- if (memcmp(p, Archive::armag, Archive::sarmag) == 0)
+ if (memcmp(ehdr_buf, Archive::armag, Archive::sarmag) == 0)
{
// This is an archive.
Archive* arch = new Archive(this->input_argument_->file().name(),
}
}
- if (bytes == 0)
- {
- fprintf(stderr, _("%s: %s: file is empty\n"),
- program_name, input_file->file().filename().c_str());
- gold_exit(false);
- }
-
// Try to parse this file as a script.
if (read_input_script(workqueue, this->options_, this->symtab_,
this->layout_, this->dirpath_, this->input_objects_,
this->input_group_, this->input_argument_, input_file,
- p, bytes, this->this_blocker_, this->next_blocker_))
+ ehdr_buf, read_size, this->this_blocker_,
+ this->next_blocker_))
return;
// Here we have to handle any other input file types we need.