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-rw-r--r--base/loader/object_file.cc115
1 files changed, 115 insertions, 0 deletions
diff --git a/base/loader/object_file.cc b/base/loader/object_file.cc
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+++ b/base/loader/object_file.cc
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+/*
+ * Copyright (c) 2003 The Regents of The University of Michigan
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met: redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer;
+ * redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution;
+ * neither the name of the copyright holders nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <list>
+#include <string>
+
+#include <sys/types.h>
+#include <sys/mman.h>
+#include <fcntl.h>
+#include <stdio.h>
+#include <unistd.h>
+
+#include "cprintf.hh"
+#include "object_file.hh"
+#include "symtab.hh"
+
+#include "ecoff_object.hh"
+#include "aout_object.hh"
+#include "elf_object.hh"
+
+using namespace std;
+
+ObjectFile::ObjectFile(const string &_filename, int _fd,
+ size_t _len, uint8_t *_data)
+ : filename(_filename), descriptor(_fd), fileData(_data), len(_len)
+{
+}
+
+
+ObjectFile::~ObjectFile()
+{
+ close();
+}
+
+
+void
+ObjectFile::close()
+{
+ if (descriptor >= 0) {
+ ::close(descriptor);
+ descriptor = -1;
+ }
+
+ if (fileData) {
+ ::munmap(fileData, len);
+ fileData = NULL;
+ }
+}
+
+
+ObjectFile *
+createObjectFile(const string &fname)
+{
+ // open the file
+ int fd = open(fname.c_str(), O_RDONLY);
+ if (fd < 0) {
+ return NULL;
+ }
+
+ // find the length of the file by seeking to the end
+ size_t len = (size_t)lseek(fd, 0, SEEK_END);
+
+ // mmap the whole shebang
+ uint8_t *fileData =
+ (uint8_t *)mmap(NULL, len, PROT_READ, MAP_SHARED, fd, 0);
+ if (fileData == MAP_FAILED) {
+ close(fd);
+ return NULL;
+ }
+
+ ObjectFile *fileObj = NULL;
+
+ // figure out what we have here
+ if ((fileObj = EcoffObject::tryFile(fname, fd, len, fileData)) != NULL) {
+ return fileObj;
+ }
+
+ if ((fileObj = AoutObject::tryFile(fname, fd, len, fileData)) != NULL) {
+ return fileObj;
+ }
+
+ if ((fileObj = ElfObject::tryFile(fname, fd, len, fileData)) != NULL) {
+ return fileObj;
+ }
+
+ // don't know what it is
+ close(fd);
+ munmap(fileData, len);
+ return NULL;
+}