cc3d75ad72
This namespace has gone through the deprecation period and can now be removed. Change-Id: I87b763fccfcdf720909dfbda9c3fc8f6dea36a61 Signed-off-by: Daniel R. Carvalho <odanrc@yahoo.com.br> Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/67362 Tested-by: kokoro <noreply+kokoro@google.com>
139 lines
4.1 KiB
C++
139 lines
4.1 KiB
C++
/*
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* Copyright (c) 2002-2004 The Regents of The University of Michigan
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met: redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer;
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* redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution;
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* neither the name of the copyright holders nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "base/loader/image_file_data.hh"
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#include <fcntl.h>
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#include <sys/mman.h>
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#include <sys/types.h>
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#include <unistd.h>
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#include <zlib.h>
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#include <cstdio>
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#include <vector>
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#include "base/logging.hh"
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namespace gem5
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{
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namespace loader
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{
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static bool
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hasGzipMagic(int fd)
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{
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uint8_t buf[2] = {0};
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size_t sz = pread(fd, buf, 2, 0);
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panic_if(sz != 2, "Couldn't read magic bytes from object file");
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return ((buf[0] == 0x1f) && (buf[1] == 0x8b));
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}
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static int
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doGzipLoad(int fd)
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{
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const size_t blk_sz = 4096;
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gzFile fdz = gzdopen(fd, "rb");
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if (!fdz) {
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return -1;
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}
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size_t tmp_len = strlen(P_tmpdir);
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char *tmpnam = (char*) malloc(tmp_len + 20);
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strcpy(tmpnam, P_tmpdir);
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strcpy(tmpnam+tmp_len, "/gem5-gz-obj-XXXXXX"); // 19 chars
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fd = mkstemp(tmpnam); // repurposing fd variable for output
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if (fd < 0) {
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free(tmpnam);
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gzclose(fdz);
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return fd;
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}
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if (unlink(tmpnam) != 0)
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warn("couldn't remove temporary file %s\n", tmpnam);
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free(tmpnam);
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auto buf = new uint8_t[blk_sz];
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int r; // size of (r)emaining uncopied data in (buf)fer
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while ((r = gzread(fdz, buf, blk_sz)) > 0) {
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auto p = buf; // pointer into buffer
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while (r > 0) {
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auto sz = write(fd, p, r);
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assert(sz <= r);
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r -= sz;
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p += sz;
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}
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}
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delete[] buf;
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gzclose(fdz);
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if (r < 0) { // error
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close(fd);
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return -1;
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}
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assert(r == 0); // finished successfully
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return fd; // return fd to decompressed temporary file for mmap()'ing
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}
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ImageFileData::ImageFileData(const std::string &fname)
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{
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_filename = fname;
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// Open the file.
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int fd = open(fname.c_str(), O_RDONLY);
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fatal_if(fd < 0, "Failed to open file %s.\n"
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"This error typically occurs when the file path specified is "
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"incorrect.\n", fname);
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// Decompress GZ files.
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if (hasGzipMagic(fd)) {
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fd = doGzipLoad(fd);
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panic_if(fd < 0, "Failed to unzip file %s.\n", fname);
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}
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// Find the length of the file by seeking to the end.
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off_t off = lseek(fd, 0, SEEK_END);
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fatal_if(off < 0, "Failed to determine size of file %s.\n", fname);
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_len = static_cast<size_t>(off);
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// Mmap the whole shebang.
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_data = (uint8_t *)mmap(NULL, _len, PROT_READ, MAP_SHARED, fd, 0);
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close(fd);
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panic_if(_data == MAP_FAILED, "Failed to mmap file %s.\n", fname);
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}
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ImageFileData::~ImageFileData()
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{
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munmap((void *)_data, _len);
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}
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} // namespace loader
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} // namespace gem5
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