diff options
Diffstat (limited to 'src/base/loader/object_file.cc')
-rw-r--r-- | src/base/loader/object_file.cc | 145 |
1 files changed, 145 insertions, 0 deletions
diff --git a/src/base/loader/object_file.cc b/src/base/loader/object_file.cc new file mode 100644 index 000000000..c6dfced1d --- /dev/null +++ b/src/base/loader/object_file.cc @@ -0,0 +1,145 @@ +/* + * Copyright (c) 2002-2004 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 "base/cprintf.hh" +#include "base/loader/object_file.hh" +#include "base/loader/symtab.hh" + +#include "base/loader/ecoff_object.hh" +#include "base/loader/aout_object.hh" +#include "base/loader/elf_object.hh" + +#include "mem/translating_port.hh" + +using namespace std; + +ObjectFile::ObjectFile(const string &_filename, int _fd, + size_t _len, uint8_t *_data, + Arch _arch, OpSys _opSys) + : filename(_filename), descriptor(_fd), fileData(_data), len(_len), + arch(_arch), opSys(_opSys) +{ +} + + +ObjectFile::~ObjectFile() +{ + close(); +} + + +bool +ObjectFile::loadSection(Section *sec, Port *memPort, Addr addrMask) +{ + if (sec->size != 0) { + Addr addr = sec->baseAddr & addrMask; + if (sec->fileImage) { + memPort->writeBlob(addr, sec->fileImage, sec->size); + } + else { + // no image: must be bss + memPort->memsetBlob(addr, 0, sec->size); + } + } + return true; +} + + +bool +ObjectFile::loadSections(Port *memPort, Addr addrMask) +{ + return (loadSection(&text, memPort, addrMask) + && loadSection(&data, memPort, addrMask) + && loadSection(&bss, memPort, addrMask)); +} + + +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; +} |