8a4fcdee4d
By delegating actually calling usage() elsewhere, we can remove a dependency from the commands themselves, and also make testing easier since we won't exit() every time we call a command with bad arguments. Change-Id: I6b8e2cb77ce0456b16673f10349362cc53218bba Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/27565 Reviewed-by: Gabe Black <gabeblack@google.com> Maintainer: Gabe Black <gabeblack@google.com> Tested-by: kokoro <noreply+kokoro@google.com>
81 lines
2.6 KiB
C++
81 lines
2.6 KiB
C++
/*
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* Copyright (c) 2003-2005 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 <cstring>
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#include <iostream>
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#include "args.hh"
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#include "command.hh"
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#include "dispatch_table.hh"
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namespace
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{
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int
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read_file(const DispatchTable &dt, std::ostream &os)
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{
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char buf[256 * 1024];
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// Touch all buffer pages to ensure they are mapped in the
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// page table. This is required in the case of X86_FS, where
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// Linux does demand paging.
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memset(buf, 0, sizeof(buf));
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int len;
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int offset = 0;
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while ((len = (*dt.m5_read_file)(buf, sizeof(buf), offset)) > 0) {
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os.write(buf, len);
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os.flush();
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if (!os) {
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std::cerr << "Failed to write file" << std::endl;
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exit(2);
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}
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offset += len;
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}
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return offset;
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}
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bool
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do_read_file(const DispatchTable &dt, Args &args)
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{
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if (args.size() > 0)
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return false;
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read_file(dt, std::cout);
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return true;
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}
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Command read_file_cmd = {
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"readfile", 0, 0, do_read_file, "\n"
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" read a preselected file from the host and write it to "
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"stdout" };
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} // anonymous namespace
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