a928a438b8
Used cppclean to help identify useless includes and removed them. This involved erroneously included headers, but also cases where forward declarations could have been used rather than a full include.
1662 lines
52 KiB
C++
1662 lines
52 KiB
C++
/*
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* Copyright (c) 2012-2013, 2015 ARM Limited
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* Copyright (c) 2015 Advanced Micro Devices, Inc.
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* All rights reserved
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*
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* The license below extends only to copyright in the software and shall
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* not be construed as granting a license to any other intellectual
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* property including but not limited to intellectual property relating
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* to a hardware implementation of the functionality of the software
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* licensed hereunder. You may use the software subject to the license
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* terms below provided that you ensure that this notice is replicated
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* unmodified and in its entirety in all distributions of the software,
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* modified or unmodified, in source code or in binary form.
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*
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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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* Authors: Steve Reinhardt
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* Kevin Lim
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*/
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#ifndef __SIM_SYSCALL_EMUL_HH__
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#define __SIM_SYSCALL_EMUL_HH__
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#define NO_STAT64 (defined(__APPLE__) || defined(__OpenBSD__) || \
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defined(__FreeBSD__) || defined(__CYGWIN__) || \
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defined(__NetBSD__))
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#define NO_STATFS (defined(__APPLE__) || defined(__OpenBSD__) || \
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defined(__FreeBSD__) || defined(__NetBSD__))
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#define NO_FALLOCATE (defined(__APPLE__) || defined(__OpenBSD__) || \
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defined(__FreeBSD__) || defined(__NetBSD__))
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///
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/// @file syscall_emul.hh
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///
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/// This file defines objects used to emulate syscalls from the target
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/// application on the host machine.
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#ifdef __CYGWIN32__
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#include <sys/fcntl.h>
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#endif
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#include <fcntl.h>
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#include <sys/mman.h>
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#include <sys/stat.h>
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#if (NO_STATFS == 0)
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#include <sys/statfs.h>
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#endif
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#include <sys/time.h>
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#include <sys/uio.h>
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#include <unistd.h>
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#include <cerrno>
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#include <string>
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#include "base/intmath.hh"
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#include "base/loader/object_file.hh"
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#include "base/misc.hh"
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#include "base/trace.hh"
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#include "base/types.hh"
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#include "config/the_isa.hh"
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#include "cpu/base.hh"
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#include "cpu/thread_context.hh"
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#include "mem/page_table.hh"
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#include "sim/emul_driver.hh"
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#include "sim/process.hh"
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#include "sim/syscall_debug_macros.hh"
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#include "sim/syscall_emul_buf.hh"
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#include "sim/syscall_return.hh"
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class SyscallDesc;
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//////////////////////////////////////////////////////////////////////
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//
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// The following emulation functions are generic enough that they
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// don't need to be recompiled for different emulated OS's. They are
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// defined in sim/syscall_emul.cc.
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//
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//////////////////////////////////////////////////////////////////////
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/// Handler for unimplemented syscalls that we haven't thought about.
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SyscallReturn unimplementedFunc(SyscallDesc *desc, int num,
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LiveProcess *p, ThreadContext *tc);
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/// Handler for unimplemented syscalls that we never intend to
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/// implement (signal handling, etc.) and should not affect the correct
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/// behavior of the program. Print a warning only if the appropriate
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/// trace flag is enabled. Return success to the target program.
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SyscallReturn ignoreFunc(SyscallDesc *desc, int num,
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LiveProcess *p, ThreadContext *tc);
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// Target fallocateFunc() handler.
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SyscallReturn fallocateFunc(SyscallDesc *desc, int num,
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LiveProcess *p, ThreadContext *tc);
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/// Target exit() handler: terminate current context.
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SyscallReturn exitFunc(SyscallDesc *desc, int num,
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LiveProcess *p, ThreadContext *tc);
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/// Target exit_group() handler: terminate simulation. (exit all threads)
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SyscallReturn exitGroupFunc(SyscallDesc *desc, int num,
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LiveProcess *p, ThreadContext *tc);
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/// Target getpagesize() handler.
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SyscallReturn getpagesizeFunc(SyscallDesc *desc, int num,
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LiveProcess *p, ThreadContext *tc);
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/// Target brk() handler: set brk address.
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SyscallReturn brkFunc(SyscallDesc *desc, int num,
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LiveProcess *p, ThreadContext *tc);
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/// Target close() handler.
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SyscallReturn closeFunc(SyscallDesc *desc, int num,
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LiveProcess *p, ThreadContext *tc);
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/// Target read() handler.
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SyscallReturn readFunc(SyscallDesc *desc, int num,
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LiveProcess *p, ThreadContext *tc);
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/// Target write() handler.
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SyscallReturn writeFunc(SyscallDesc *desc, int num,
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LiveProcess *p, ThreadContext *tc);
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/// Target lseek() handler.
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SyscallReturn lseekFunc(SyscallDesc *desc, int num,
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LiveProcess *p, ThreadContext *tc);
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/// Target _llseek() handler.
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SyscallReturn _llseekFunc(SyscallDesc *desc, int num,
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LiveProcess *p, ThreadContext *tc);
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/// Target munmap() handler.
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SyscallReturn munmapFunc(SyscallDesc *desc, int num,
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LiveProcess *p, ThreadContext *tc);
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/// Target gethostname() handler.
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SyscallReturn gethostnameFunc(SyscallDesc *desc, int num,
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LiveProcess *p, ThreadContext *tc);
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/// Target getcwd() handler.
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SyscallReturn getcwdFunc(SyscallDesc *desc, int num,
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LiveProcess *p, ThreadContext *tc);
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/// Target readlink() handler.
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SyscallReturn readlinkFunc(SyscallDesc *desc, int num,
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LiveProcess *p, ThreadContext *tc,
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int index = 0);
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SyscallReturn readlinkFunc(SyscallDesc *desc, int num,
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LiveProcess *p, ThreadContext *tc);
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/// Target unlink() handler.
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SyscallReturn unlinkHelper(SyscallDesc *desc, int num,
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LiveProcess *p, ThreadContext *tc,
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int index);
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SyscallReturn unlinkFunc(SyscallDesc *desc, int num,
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LiveProcess *p, ThreadContext *tc);
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/// Target mkdir() handler.
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SyscallReturn mkdirFunc(SyscallDesc *desc, int num,
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LiveProcess *p, ThreadContext *tc);
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/// Target rename() handler.
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SyscallReturn renameFunc(SyscallDesc *desc, int num,
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LiveProcess *p, ThreadContext *tc);
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/// Target truncate() handler.
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SyscallReturn truncateFunc(SyscallDesc *desc, int num,
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LiveProcess *p, ThreadContext *tc);
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/// Target ftruncate() handler.
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SyscallReturn ftruncateFunc(SyscallDesc *desc, int num,
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LiveProcess *p, ThreadContext *tc);
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/// Target truncate64() handler.
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SyscallReturn truncate64Func(SyscallDesc *desc, int num,
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LiveProcess *p, ThreadContext *tc);
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/// Target ftruncate64() handler.
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SyscallReturn ftruncate64Func(SyscallDesc *desc, int num,
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LiveProcess *p, ThreadContext *tc);
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/// Target umask() handler.
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SyscallReturn umaskFunc(SyscallDesc *desc, int num,
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LiveProcess *p, ThreadContext *tc);
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/// Target chown() handler.
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SyscallReturn chownFunc(SyscallDesc *desc, int num,
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LiveProcess *p, ThreadContext *tc);
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/// Target fchown() handler.
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SyscallReturn fchownFunc(SyscallDesc *desc, int num,
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LiveProcess *p, ThreadContext *tc);
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/// Target dup() handler.
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SyscallReturn dupFunc(SyscallDesc *desc, int num,
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LiveProcess *process, ThreadContext *tc);
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/// Target fnctl() handler.
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SyscallReturn fcntlFunc(SyscallDesc *desc, int num,
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LiveProcess *process, ThreadContext *tc);
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/// Target fcntl64() handler.
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SyscallReturn fcntl64Func(SyscallDesc *desc, int num,
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LiveProcess *process, ThreadContext *tc);
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/// Target setuid() handler.
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SyscallReturn setuidFunc(SyscallDesc *desc, int num,
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LiveProcess *p, ThreadContext *tc);
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/// Target getpid() handler.
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SyscallReturn getpidFunc(SyscallDesc *desc, int num,
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LiveProcess *p, ThreadContext *tc);
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/// Target getuid() handler.
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SyscallReturn getuidFunc(SyscallDesc *desc, int num,
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LiveProcess *p, ThreadContext *tc);
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/// Target getgid() handler.
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SyscallReturn getgidFunc(SyscallDesc *desc, int num,
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LiveProcess *p, ThreadContext *tc);
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/// Target getppid() handler.
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SyscallReturn getppidFunc(SyscallDesc *desc, int num,
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LiveProcess *p, ThreadContext *tc);
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/// Target geteuid() handler.
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SyscallReturn geteuidFunc(SyscallDesc *desc, int num,
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LiveProcess *p, ThreadContext *tc);
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/// Target getegid() handler.
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SyscallReturn getegidFunc(SyscallDesc *desc, int num,
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LiveProcess *p, ThreadContext *tc);
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/// Target clone() handler.
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SyscallReturn cloneFunc(SyscallDesc *desc, int num,
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LiveProcess *p, ThreadContext *tc);
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/// Target access() handler
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SyscallReturn accessFunc(SyscallDesc *desc, int num,
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LiveProcess *p, ThreadContext *tc);
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SyscallReturn accessFunc(SyscallDesc *desc, int num,
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LiveProcess *p, ThreadContext *tc,
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int index);
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/// Futex system call
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/// Implemented by Daniel Sanchez
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/// Used by printf's in multi-threaded apps
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template <class OS>
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SyscallReturn
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futexFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
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ThreadContext *tc)
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{
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int index_uaddr = 0;
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int index_op = 1;
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int index_val = 2;
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int index_timeout = 3;
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uint64_t uaddr = process->getSyscallArg(tc, index_uaddr);
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int op = process->getSyscallArg(tc, index_op);
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int val = process->getSyscallArg(tc, index_val);
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uint64_t timeout = process->getSyscallArg(tc, index_timeout);
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std::map<uint64_t, std::list<ThreadContext *> * >
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&futex_map = tc->getSystemPtr()->futexMap;
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DPRINTF(SyscallVerbose, "In sys_futex: Address=%llx, op=%d, val=%d\n",
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uaddr, op, val);
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op &= ~OS::TGT_FUTEX_PRIVATE_FLAG;
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if (op == OS::TGT_FUTEX_WAIT) {
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if (timeout != 0) {
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warn("sys_futex: FUTEX_WAIT with non-null timeout unimplemented;"
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"we'll wait indefinitely");
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}
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uint8_t *buf = new uint8_t[sizeof(int)];
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tc->getMemProxy().readBlob((Addr)uaddr, buf, (int)sizeof(int));
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int mem_val = *((int *)buf);
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delete[] buf;
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if (val != mem_val) {
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DPRINTF(SyscallVerbose, "sys_futex: FUTEX_WAKE, read: %d, "
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"expected: %d\n", mem_val, val);
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return -OS::TGT_EWOULDBLOCK;
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}
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// Queue the thread context
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std::list<ThreadContext *> * tcWaitList;
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if (futex_map.count(uaddr)) {
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tcWaitList = futex_map.find(uaddr)->second;
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} else {
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tcWaitList = new std::list<ThreadContext *>();
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futex_map.insert(std::pair< uint64_t,
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std::list<ThreadContext *> * >(uaddr, tcWaitList));
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}
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tcWaitList->push_back(tc);
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DPRINTF(SyscallVerbose, "sys_futex: FUTEX_WAIT, suspending calling "
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"thread context\n");
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tc->suspend();
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return 0;
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} else if (op == OS::TGT_FUTEX_WAKE){
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int wokenUp = 0;
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std::list<ThreadContext *> * tcWaitList;
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if (futex_map.count(uaddr)) {
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tcWaitList = futex_map.find(uaddr)->second;
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while (tcWaitList->size() > 0 && wokenUp < val) {
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tcWaitList->front()->activate();
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tcWaitList->pop_front();
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wokenUp++;
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}
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if (tcWaitList->empty()) {
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futex_map.erase(uaddr);
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delete tcWaitList;
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}
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}
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DPRINTF(SyscallVerbose, "sys_futex: FUTEX_WAKE, activated %d waiting "
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"thread contexts\n", wokenUp);
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return wokenUp;
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} else {
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warn("sys_futex: op %d is not implemented, just returning...", op);
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return 0;
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}
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}
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/// Pseudo Funcs - These functions use a different return convension,
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/// returning a second value in a register other than the normal return register
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SyscallReturn pipePseudoFunc(SyscallDesc *desc, int num,
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LiveProcess *process, ThreadContext *tc);
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/// Target getpidPseudo() handler.
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SyscallReturn getpidPseudoFunc(SyscallDesc *desc, int num,
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LiveProcess *p, ThreadContext *tc);
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/// Target getuidPseudo() handler.
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SyscallReturn getuidPseudoFunc(SyscallDesc *desc, int num,
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LiveProcess *p, ThreadContext *tc);
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/// Target getgidPseudo() handler.
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SyscallReturn getgidPseudoFunc(SyscallDesc *desc, int num,
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LiveProcess *p, ThreadContext *tc);
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/// A readable name for 1,000,000, for converting microseconds to seconds.
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const int one_million = 1000000;
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/// A readable name for 1,000,000,000, for converting nanoseconds to seconds.
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const int one_billion = 1000000000;
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/// Approximate seconds since the epoch (1/1/1970). About a billion,
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/// by my reckoning. We want to keep this a constant (not use the
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/// real-world time) to keep simulations repeatable.
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const unsigned seconds_since_epoch = 1000000000;
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/// Helper function to convert current elapsed time to seconds and
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/// microseconds.
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template <class T1, class T2>
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void
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getElapsedTimeMicro(T1 &sec, T2 &usec)
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{
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uint64_t elapsed_usecs = curTick() / SimClock::Int::us;
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sec = elapsed_usecs / one_million;
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usec = elapsed_usecs % one_million;
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}
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/// Helper function to convert current elapsed time to seconds and
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/// nanoseconds.
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template <class T1, class T2>
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void
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getElapsedTimeNano(T1 &sec, T2 &nsec)
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{
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uint64_t elapsed_nsecs = curTick() / SimClock::Int::ns;
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sec = elapsed_nsecs / one_billion;
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nsec = elapsed_nsecs % one_billion;
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}
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//////////////////////////////////////////////////////////////////////
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//
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// The following emulation functions are generic, but need to be
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// templated to account for differences in types, constants, etc.
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//
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//////////////////////////////////////////////////////////////////////
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typedef struct statfs hst_statfs;
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#if NO_STAT64
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typedef struct stat hst_stat;
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typedef struct stat hst_stat64;
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#else
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typedef struct stat hst_stat;
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typedef struct stat64 hst_stat64;
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#endif
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//// Helper function to convert a host stat buffer to a target stat
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//// buffer. Also copies the target buffer out to the simulated
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//// memory space. Used by stat(), fstat(), and lstat().
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template <typename target_stat, typename host_stat>
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static void
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convertStatBuf(target_stat &tgt, host_stat *host, bool fakeTTY = false)
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{
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using namespace TheISA;
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if (fakeTTY)
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tgt->st_dev = 0xA;
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else
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tgt->st_dev = host->st_dev;
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tgt->st_dev = TheISA::htog(tgt->st_dev);
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tgt->st_ino = host->st_ino;
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tgt->st_ino = TheISA::htog(tgt->st_ino);
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tgt->st_mode = host->st_mode;
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if (fakeTTY) {
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// Claim to be a character device
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tgt->st_mode &= ~S_IFMT; // Clear S_IFMT
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tgt->st_mode |= S_IFCHR; // Set S_IFCHR
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}
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tgt->st_mode = TheISA::htog(tgt->st_mode);
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tgt->st_nlink = host->st_nlink;
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tgt->st_nlink = TheISA::htog(tgt->st_nlink);
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tgt->st_uid = host->st_uid;
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tgt->st_uid = TheISA::htog(tgt->st_uid);
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tgt->st_gid = host->st_gid;
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tgt->st_gid = TheISA::htog(tgt->st_gid);
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if (fakeTTY)
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tgt->st_rdev = 0x880d;
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else
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tgt->st_rdev = host->st_rdev;
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tgt->st_rdev = TheISA::htog(tgt->st_rdev);
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tgt->st_size = host->st_size;
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tgt->st_size = TheISA::htog(tgt->st_size);
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tgt->st_atimeX = host->st_atime;
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tgt->st_atimeX = TheISA::htog(tgt->st_atimeX);
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tgt->st_mtimeX = host->st_mtime;
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tgt->st_mtimeX = TheISA::htog(tgt->st_mtimeX);
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tgt->st_ctimeX = host->st_ctime;
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tgt->st_ctimeX = TheISA::htog(tgt->st_ctimeX);
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// Force the block size to be 8k. This helps to ensure buffered io works
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// consistently across different hosts.
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tgt->st_blksize = 0x2000;
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tgt->st_blksize = TheISA::htog(tgt->st_blksize);
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tgt->st_blocks = host->st_blocks;
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tgt->st_blocks = TheISA::htog(tgt->st_blocks);
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}
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// Same for stat64
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template <typename target_stat, typename host_stat64>
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static void
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convertStat64Buf(target_stat &tgt, host_stat64 *host, bool fakeTTY = false)
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{
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using namespace TheISA;
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convertStatBuf<target_stat, host_stat64>(tgt, host, fakeTTY);
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#if defined(STAT_HAVE_NSEC)
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tgt->st_atime_nsec = host->st_atime_nsec;
|
|
tgt->st_atime_nsec = TheISA::htog(tgt->st_atime_nsec);
|
|
tgt->st_mtime_nsec = host->st_mtime_nsec;
|
|
tgt->st_mtime_nsec = TheISA::htog(tgt->st_mtime_nsec);
|
|
tgt->st_ctime_nsec = host->st_ctime_nsec;
|
|
tgt->st_ctime_nsec = TheISA::htog(tgt->st_ctime_nsec);
|
|
#else
|
|
tgt->st_atime_nsec = 0;
|
|
tgt->st_mtime_nsec = 0;
|
|
tgt->st_ctime_nsec = 0;
|
|
#endif
|
|
}
|
|
|
|
//Here are a couple convenience functions
|
|
template<class OS>
|
|
static void
|
|
copyOutStatBuf(SETranslatingPortProxy &mem, Addr addr,
|
|
hst_stat *host, bool fakeTTY = false)
|
|
{
|
|
typedef TypedBufferArg<typename OS::tgt_stat> tgt_stat_buf;
|
|
tgt_stat_buf tgt(addr);
|
|
convertStatBuf<tgt_stat_buf, hst_stat>(tgt, host, fakeTTY);
|
|
tgt.copyOut(mem);
|
|
}
|
|
|
|
template<class OS>
|
|
static void
|
|
copyOutStat64Buf(SETranslatingPortProxy &mem, Addr addr,
|
|
hst_stat64 *host, bool fakeTTY = false)
|
|
{
|
|
typedef TypedBufferArg<typename OS::tgt_stat64> tgt_stat_buf;
|
|
tgt_stat_buf tgt(addr);
|
|
convertStat64Buf<tgt_stat_buf, hst_stat64>(tgt, host, fakeTTY);
|
|
tgt.copyOut(mem);
|
|
}
|
|
|
|
template <class OS>
|
|
static void
|
|
copyOutStatfsBuf(SETranslatingPortProxy &mem, Addr addr,
|
|
hst_statfs *host)
|
|
{
|
|
TypedBufferArg<typename OS::tgt_statfs> tgt(addr);
|
|
|
|
#if defined(__OpenBSD__) || defined(__APPLE__) || defined(__FreeBSD__)
|
|
tgt->f_type = 0;
|
|
#else
|
|
tgt->f_type = TheISA::htog(host->f_type);
|
|
#endif
|
|
tgt->f_bsize = TheISA::htog(host->f_bsize);
|
|
tgt->f_blocks = TheISA::htog(host->f_blocks);
|
|
tgt->f_bfree = TheISA::htog(host->f_bfree);
|
|
tgt->f_bavail = TheISA::htog(host->f_bavail);
|
|
tgt->f_files = TheISA::htog(host->f_files);
|
|
tgt->f_ffree = TheISA::htog(host->f_ffree);
|
|
memcpy(&tgt->f_fsid, &host->f_fsid, sizeof(host->f_fsid));
|
|
tgt->f_namelen = TheISA::htog(host->f_namelen);
|
|
tgt->f_frsize = TheISA::htog(host->f_frsize);
|
|
memcpy(&tgt->f_spare, &host->f_spare, sizeof(host->f_spare));
|
|
|
|
tgt.copyOut(mem);
|
|
}
|
|
|
|
/// Target ioctl() handler. For the most part, programs call ioctl()
|
|
/// only to find out if their stdout is a tty, to determine whether to
|
|
/// do line or block buffering. We always claim that output fds are
|
|
/// not TTYs to provide repeatable results.
|
|
template <class OS>
|
|
SyscallReturn
|
|
ioctlFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
|
|
ThreadContext *tc)
|
|
{
|
|
int index = 0;
|
|
int tgt_fd = process->getSyscallArg(tc, index);
|
|
unsigned req = process->getSyscallArg(tc, index);
|
|
|
|
DPRINTF(SyscallVerbose, "ioctl(%d, 0x%x, ...)\n", tgt_fd, req);
|
|
|
|
FDEntry *fde = process->getFDEntry(tgt_fd);
|
|
|
|
if (fde == NULL) {
|
|
// doesn't map to any simulator fd: not a valid target fd
|
|
return -EBADF;
|
|
}
|
|
|
|
if (fde->driver != NULL) {
|
|
return fde->driver->ioctl(process, tc, req);
|
|
}
|
|
|
|
if (OS::isTtyReq(req)) {
|
|
return -ENOTTY;
|
|
}
|
|
|
|
warn("Unsupported ioctl call: ioctl(%d, 0x%x, ...) @ \n",
|
|
tgt_fd, req, tc->pcState());
|
|
return -ENOTTY;
|
|
}
|
|
|
|
template <class OS>
|
|
static SyscallReturn
|
|
openFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
|
|
ThreadContext *tc, int index)
|
|
{
|
|
std::string path;
|
|
|
|
if (!tc->getMemProxy().tryReadString(path,
|
|
process->getSyscallArg(tc, index)))
|
|
return -EFAULT;
|
|
|
|
int tgtFlags = process->getSyscallArg(tc, index);
|
|
int mode = process->getSyscallArg(tc, index);
|
|
int hostFlags = 0;
|
|
|
|
// translate open flags
|
|
for (int i = 0; i < OS::NUM_OPEN_FLAGS; i++) {
|
|
if (tgtFlags & OS::openFlagTable[i].tgtFlag) {
|
|
tgtFlags &= ~OS::openFlagTable[i].tgtFlag;
|
|
hostFlags |= OS::openFlagTable[i].hostFlag;
|
|
}
|
|
}
|
|
|
|
// any target flags left?
|
|
if (tgtFlags != 0)
|
|
warn("Syscall: open: cannot decode flags 0x%x", tgtFlags);
|
|
|
|
#ifdef __CYGWIN32__
|
|
hostFlags |= O_BINARY;
|
|
#endif
|
|
|
|
// Adjust path for current working directory
|
|
path = process->fullPath(path);
|
|
|
|
DPRINTF(SyscallVerbose, "opening file %s\n", path.c_str());
|
|
|
|
if (startswith(path, "/dev/")) {
|
|
std::string filename = path.substr(strlen("/dev/"));
|
|
if (filename == "sysdev0") {
|
|
// This is a memory-mapped high-resolution timer device on Alpha.
|
|
// We don't support it, so just punt.
|
|
warn("Ignoring open(%s, ...)\n", path);
|
|
return -ENOENT;
|
|
}
|
|
|
|
EmulatedDriver *drv = process->findDriver(filename);
|
|
if (drv != NULL) {
|
|
// the driver's open method will allocate a fd from the
|
|
// process if necessary.
|
|
return drv->open(process, tc, mode, hostFlags);
|
|
}
|
|
|
|
// fall through here for pass through to host devices, such as
|
|
// /dev/zero
|
|
}
|
|
|
|
int fd;
|
|
int local_errno;
|
|
if (startswith(path, "/proc/") || startswith(path, "/system/") ||
|
|
startswith(path, "/platform/") || startswith(path, "/sys/")) {
|
|
// It's a proc/sys entry and requires special handling
|
|
fd = OS::openSpecialFile(path, process, tc);
|
|
local_errno = ENOENT;
|
|
} else {
|
|
// open the file
|
|
fd = open(path.c_str(), hostFlags, mode);
|
|
local_errno = errno;
|
|
}
|
|
|
|
if (fd == -1)
|
|
return -local_errno;
|
|
|
|
return process->allocFD(fd, path.c_str(), hostFlags, mode, false);
|
|
}
|
|
|
|
/// Target open() handler.
|
|
template <class OS>
|
|
SyscallReturn
|
|
openFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
|
|
ThreadContext *tc)
|
|
{
|
|
return openFunc<OS>(desc, callnum, process, tc, 0);
|
|
}
|
|
|
|
/// Target openat() handler.
|
|
template <class OS>
|
|
SyscallReturn
|
|
openatFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
|
|
ThreadContext *tc)
|
|
{
|
|
int index = 0;
|
|
int dirfd = process->getSyscallArg(tc, index);
|
|
if (dirfd != OS::TGT_AT_FDCWD)
|
|
warn("openat: first argument not AT_FDCWD; unlikely to work");
|
|
return openFunc<OS>(desc, callnum, process, tc, 1);
|
|
}
|
|
|
|
/// Target unlinkat() handler.
|
|
template <class OS>
|
|
SyscallReturn
|
|
unlinkatFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
|
|
ThreadContext *tc)
|
|
{
|
|
int index = 0;
|
|
int dirfd = process->getSyscallArg(tc, index);
|
|
if (dirfd != OS::TGT_AT_FDCWD)
|
|
warn("unlinkat: first argument not AT_FDCWD; unlikely to work");
|
|
|
|
return unlinkHelper(desc, callnum, process, tc, 1);
|
|
}
|
|
|
|
/// Target facessat() handler
|
|
template <class OS>
|
|
SyscallReturn
|
|
faccessatFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
|
|
ThreadContext *tc)
|
|
{
|
|
int index = 0;
|
|
int dirfd = process->getSyscallArg(tc, index);
|
|
if (dirfd != OS::TGT_AT_FDCWD)
|
|
warn("faccessat: first argument not AT_FDCWD; unlikely to work");
|
|
return accessFunc(desc, callnum, process, tc, 1);
|
|
}
|
|
|
|
/// Target readlinkat() handler
|
|
template <class OS>
|
|
SyscallReturn
|
|
readlinkatFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
|
|
ThreadContext *tc)
|
|
{
|
|
int index = 0;
|
|
int dirfd = process->getSyscallArg(tc, index);
|
|
if (dirfd != OS::TGT_AT_FDCWD)
|
|
warn("openat: first argument not AT_FDCWD; unlikely to work");
|
|
return readlinkFunc(desc, callnum, process, tc, 1);
|
|
}
|
|
|
|
/// Target renameat() handler.
|
|
template <class OS>
|
|
SyscallReturn
|
|
renameatFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
|
|
ThreadContext *tc)
|
|
{
|
|
int index = 0;
|
|
|
|
int olddirfd = process->getSyscallArg(tc, index);
|
|
if (olddirfd != OS::TGT_AT_FDCWD)
|
|
warn("renameat: first argument not AT_FDCWD; unlikely to work");
|
|
|
|
std::string old_name;
|
|
|
|
if (!tc->getMemProxy().tryReadString(old_name,
|
|
process->getSyscallArg(tc, index)))
|
|
return -EFAULT;
|
|
|
|
int newdirfd = process->getSyscallArg(tc, index);
|
|
if (newdirfd != OS::TGT_AT_FDCWD)
|
|
warn("renameat: third argument not AT_FDCWD; unlikely to work");
|
|
|
|
std::string new_name;
|
|
|
|
if (!tc->getMemProxy().tryReadString(new_name,
|
|
process->getSyscallArg(tc, index)))
|
|
return -EFAULT;
|
|
|
|
// Adjust path for current working directory
|
|
old_name = process->fullPath(old_name);
|
|
new_name = process->fullPath(new_name);
|
|
|
|
int result = rename(old_name.c_str(), new_name.c_str());
|
|
return (result == -1) ? -errno : result;
|
|
}
|
|
|
|
/// Target sysinfo() handler.
|
|
template <class OS>
|
|
SyscallReturn
|
|
sysinfoFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
|
|
ThreadContext *tc)
|
|
{
|
|
|
|
int index = 0;
|
|
TypedBufferArg<typename OS::tgt_sysinfo>
|
|
sysinfo(process->getSyscallArg(tc, index));
|
|
|
|
sysinfo->uptime = seconds_since_epoch;
|
|
sysinfo->totalram = process->system->memSize();
|
|
sysinfo->mem_unit = 1;
|
|
|
|
sysinfo.copyOut(tc->getMemProxy());
|
|
|
|
return 0;
|
|
}
|
|
|
|
/// Target chmod() handler.
|
|
template <class OS>
|
|
SyscallReturn
|
|
chmodFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
|
|
ThreadContext *tc)
|
|
{
|
|
std::string path;
|
|
|
|
int index = 0;
|
|
if (!tc->getMemProxy().tryReadString(path,
|
|
process->getSyscallArg(tc, index))) {
|
|
return -EFAULT;
|
|
}
|
|
|
|
uint32_t mode = process->getSyscallArg(tc, index);
|
|
mode_t hostMode = 0;
|
|
|
|
// XXX translate mode flags via OS::something???
|
|
hostMode = mode;
|
|
|
|
// Adjust path for current working directory
|
|
path = process->fullPath(path);
|
|
|
|
// do the chmod
|
|
int result = chmod(path.c_str(), hostMode);
|
|
if (result < 0)
|
|
return -errno;
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
/// Target fchmod() handler.
|
|
template <class OS>
|
|
SyscallReturn
|
|
fchmodFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
|
|
ThreadContext *tc)
|
|
{
|
|
int index = 0;
|
|
int tgt_fd = process->getSyscallArg(tc, index);
|
|
uint32_t mode = process->getSyscallArg(tc, index);
|
|
|
|
int sim_fd = process->getSimFD(tgt_fd);
|
|
if (sim_fd < 0)
|
|
return -EBADF;
|
|
|
|
mode_t hostMode = 0;
|
|
|
|
// XXX translate mode flags via OS::someting???
|
|
hostMode = mode;
|
|
|
|
// do the fchmod
|
|
int result = fchmod(sim_fd, hostMode);
|
|
if (result < 0)
|
|
return -errno;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/// Target mremap() handler.
|
|
template <class OS>
|
|
SyscallReturn
|
|
mremapFunc(SyscallDesc *desc, int callnum, LiveProcess *process, ThreadContext *tc)
|
|
{
|
|
int index = 0;
|
|
Addr start = process->getSyscallArg(tc, index);
|
|
uint64_t old_length = process->getSyscallArg(tc, index);
|
|
uint64_t new_length = process->getSyscallArg(tc, index);
|
|
uint64_t flags = process->getSyscallArg(tc, index);
|
|
uint64_t provided_address = 0;
|
|
bool use_provided_address = flags & OS::TGT_MREMAP_FIXED;
|
|
|
|
if (use_provided_address)
|
|
provided_address = process->getSyscallArg(tc, index);
|
|
|
|
if ((start % TheISA::PageBytes != 0) ||
|
|
(provided_address % TheISA::PageBytes != 0)) {
|
|
warn("mremap failing: arguments not page aligned");
|
|
return -EINVAL;
|
|
}
|
|
|
|
new_length = roundUp(new_length, TheISA::PageBytes);
|
|
|
|
if (new_length > old_length) {
|
|
if ((start + old_length) == process->mmap_end &&
|
|
(!use_provided_address || provided_address == start)) {
|
|
uint64_t diff = new_length - old_length;
|
|
process->allocateMem(process->mmap_end, diff);
|
|
process->mmap_end += diff;
|
|
return start;
|
|
} else {
|
|
if (!use_provided_address && !(flags & OS::TGT_MREMAP_MAYMOVE)) {
|
|
warn("can't remap here and MREMAP_MAYMOVE flag not set\n");
|
|
return -ENOMEM;
|
|
} else {
|
|
uint64_t new_start = use_provided_address ?
|
|
provided_address : process->mmap_end;
|
|
process->pTable->remap(start, old_length, new_start);
|
|
warn("mremapping to new vaddr %08p-%08p, adding %d\n",
|
|
new_start, new_start + new_length,
|
|
new_length - old_length);
|
|
// add on the remaining unallocated pages
|
|
process->allocateMem(new_start + old_length,
|
|
new_length - old_length,
|
|
use_provided_address /* clobber */);
|
|
if (!use_provided_address)
|
|
process->mmap_end += new_length;
|
|
if (use_provided_address &&
|
|
new_start + new_length > process->mmap_end) {
|
|
// something fishy going on here, at least notify the user
|
|
// @todo: increase mmap_end?
|
|
warn("mmap region limit exceeded with MREMAP_FIXED\n");
|
|
}
|
|
warn("returning %08p as start\n", new_start);
|
|
return new_start;
|
|
}
|
|
}
|
|
} else {
|
|
if (use_provided_address && provided_address != start)
|
|
process->pTable->remap(start, new_length, provided_address);
|
|
process->pTable->unmap(start + new_length, old_length - new_length);
|
|
return use_provided_address ? provided_address : start;
|
|
}
|
|
}
|
|
|
|
/// Target stat() handler.
|
|
template <class OS>
|
|
SyscallReturn
|
|
statFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
|
|
ThreadContext *tc)
|
|
{
|
|
std::string path;
|
|
|
|
int index = 0;
|
|
if (!tc->getMemProxy().tryReadString(path,
|
|
process->getSyscallArg(tc, index))) {
|
|
return -EFAULT;
|
|
}
|
|
Addr bufPtr = process->getSyscallArg(tc, index);
|
|
|
|
// Adjust path for current working directory
|
|
path = process->fullPath(path);
|
|
|
|
struct stat hostBuf;
|
|
int result = stat(path.c_str(), &hostBuf);
|
|
|
|
if (result < 0)
|
|
return -errno;
|
|
|
|
copyOutStatBuf<OS>(tc->getMemProxy(), bufPtr, &hostBuf);
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
/// Target stat64() handler.
|
|
template <class OS>
|
|
SyscallReturn
|
|
stat64Func(SyscallDesc *desc, int callnum, LiveProcess *process,
|
|
ThreadContext *tc)
|
|
{
|
|
std::string path;
|
|
|
|
int index = 0;
|
|
if (!tc->getMemProxy().tryReadString(path,
|
|
process->getSyscallArg(tc, index)))
|
|
return -EFAULT;
|
|
Addr bufPtr = process->getSyscallArg(tc, index);
|
|
|
|
// Adjust path for current working directory
|
|
path = process->fullPath(path);
|
|
|
|
#if NO_STAT64
|
|
struct stat hostBuf;
|
|
int result = stat(path.c_str(), &hostBuf);
|
|
#else
|
|
struct stat64 hostBuf;
|
|
int result = stat64(path.c_str(), &hostBuf);
|
|
#endif
|
|
|
|
if (result < 0)
|
|
return -errno;
|
|
|
|
copyOutStat64Buf<OS>(tc->getMemProxy(), bufPtr, &hostBuf);
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
/// Target fstatat64() handler.
|
|
template <class OS>
|
|
SyscallReturn
|
|
fstatat64Func(SyscallDesc *desc, int callnum, LiveProcess *process,
|
|
ThreadContext *tc)
|
|
{
|
|
int index = 0;
|
|
int dirfd = process->getSyscallArg(tc, index);
|
|
if (dirfd != OS::TGT_AT_FDCWD)
|
|
warn("fstatat64: first argument not AT_FDCWD; unlikely to work");
|
|
|
|
std::string path;
|
|
if (!tc->getMemProxy().tryReadString(path,
|
|
process->getSyscallArg(tc, index)))
|
|
return -EFAULT;
|
|
Addr bufPtr = process->getSyscallArg(tc, index);
|
|
|
|
// Adjust path for current working directory
|
|
path = process->fullPath(path);
|
|
|
|
#if NO_STAT64
|
|
struct stat hostBuf;
|
|
int result = stat(path.c_str(), &hostBuf);
|
|
#else
|
|
struct stat64 hostBuf;
|
|
int result = stat64(path.c_str(), &hostBuf);
|
|
#endif
|
|
|
|
if (result < 0)
|
|
return -errno;
|
|
|
|
copyOutStat64Buf<OS>(tc->getMemProxy(), bufPtr, &hostBuf);
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
/// Target fstat64() handler.
|
|
template <class OS>
|
|
SyscallReturn
|
|
fstat64Func(SyscallDesc *desc, int callnum, LiveProcess *process,
|
|
ThreadContext *tc)
|
|
{
|
|
int index = 0;
|
|
int tgt_fd = process->getSyscallArg(tc, index);
|
|
Addr bufPtr = process->getSyscallArg(tc, index);
|
|
|
|
int sim_fd = process->getSimFD(tgt_fd);
|
|
if (sim_fd < 0)
|
|
return -EBADF;
|
|
|
|
#if NO_STAT64
|
|
struct stat hostBuf;
|
|
int result = fstat(sim_fd, &hostBuf);
|
|
#else
|
|
struct stat64 hostBuf;
|
|
int result = fstat64(sim_fd, &hostBuf);
|
|
#endif
|
|
|
|
if (result < 0)
|
|
return -errno;
|
|
|
|
copyOutStat64Buf<OS>(tc->getMemProxy(), bufPtr, &hostBuf, (sim_fd == 1));
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
/// Target lstat() handler.
|
|
template <class OS>
|
|
SyscallReturn
|
|
lstatFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
|
|
ThreadContext *tc)
|
|
{
|
|
std::string path;
|
|
|
|
int index = 0;
|
|
if (!tc->getMemProxy().tryReadString(path,
|
|
process->getSyscallArg(tc, index))) {
|
|
return -EFAULT;
|
|
}
|
|
Addr bufPtr = process->getSyscallArg(tc, index);
|
|
|
|
// Adjust path for current working directory
|
|
path = process->fullPath(path);
|
|
|
|
struct stat hostBuf;
|
|
int result = lstat(path.c_str(), &hostBuf);
|
|
|
|
if (result < 0)
|
|
return -errno;
|
|
|
|
copyOutStatBuf<OS>(tc->getMemProxy(), bufPtr, &hostBuf);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/// Target lstat64() handler.
|
|
template <class OS>
|
|
SyscallReturn
|
|
lstat64Func(SyscallDesc *desc, int callnum, LiveProcess *process,
|
|
ThreadContext *tc)
|
|
{
|
|
std::string path;
|
|
|
|
int index = 0;
|
|
if (!tc->getMemProxy().tryReadString(path,
|
|
process->getSyscallArg(tc, index))) {
|
|
return -EFAULT;
|
|
}
|
|
Addr bufPtr = process->getSyscallArg(tc, index);
|
|
|
|
// Adjust path for current working directory
|
|
path = process->fullPath(path);
|
|
|
|
#if NO_STAT64
|
|
struct stat hostBuf;
|
|
int result = lstat(path.c_str(), &hostBuf);
|
|
#else
|
|
struct stat64 hostBuf;
|
|
int result = lstat64(path.c_str(), &hostBuf);
|
|
#endif
|
|
|
|
if (result < 0)
|
|
return -errno;
|
|
|
|
copyOutStat64Buf<OS>(tc->getMemProxy(), bufPtr, &hostBuf);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/// Target fstat() handler.
|
|
template <class OS>
|
|
SyscallReturn
|
|
fstatFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
|
|
ThreadContext *tc)
|
|
{
|
|
int index = 0;
|
|
int tgt_fd = process->getSyscallArg(tc, index);
|
|
Addr bufPtr = process->getSyscallArg(tc, index);
|
|
|
|
DPRINTF_SYSCALL(Verbose, "fstat(%d, ...)\n", tgt_fd);
|
|
|
|
int sim_fd = process->getSimFD(tgt_fd);
|
|
if (sim_fd < 0)
|
|
return -EBADF;
|
|
|
|
struct stat hostBuf;
|
|
int result = fstat(sim_fd, &hostBuf);
|
|
|
|
if (result < 0)
|
|
return -errno;
|
|
|
|
copyOutStatBuf<OS>(tc->getMemProxy(), bufPtr, &hostBuf, (sim_fd == 1));
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
/// Target statfs() handler.
|
|
template <class OS>
|
|
SyscallReturn
|
|
statfsFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
|
|
ThreadContext *tc)
|
|
{
|
|
#if NO_STATFS
|
|
warn("Host OS cannot support calls to statfs. Ignoring syscall");
|
|
#else
|
|
std::string path;
|
|
|
|
int index = 0;
|
|
if (!tc->getMemProxy().tryReadString(path,
|
|
process->getSyscallArg(tc, index))) {
|
|
return -EFAULT;
|
|
}
|
|
Addr bufPtr = process->getSyscallArg(tc, index);
|
|
|
|
// Adjust path for current working directory
|
|
path = process->fullPath(path);
|
|
|
|
struct statfs hostBuf;
|
|
int result = statfs(path.c_str(), &hostBuf);
|
|
|
|
if (result < 0)
|
|
return -errno;
|
|
|
|
copyOutStatfsBuf<OS>(tc->getMemProxy(), bufPtr, &hostBuf);
|
|
#endif
|
|
return 0;
|
|
}
|
|
|
|
|
|
/// Target fstatfs() handler.
|
|
template <class OS>
|
|
SyscallReturn
|
|
fstatfsFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
|
|
ThreadContext *tc)
|
|
{
|
|
int index = 0;
|
|
int tgt_fd = process->getSyscallArg(tc, index);
|
|
Addr bufPtr = process->getSyscallArg(tc, index);
|
|
|
|
int sim_fd = process->getSimFD(tgt_fd);
|
|
if (sim_fd < 0)
|
|
return -EBADF;
|
|
|
|
struct statfs hostBuf;
|
|
int result = fstatfs(sim_fd, &hostBuf);
|
|
|
|
if (result < 0)
|
|
return -errno;
|
|
|
|
copyOutStatfsBuf<OS>(tc->getMemProxy(), bufPtr, &hostBuf);
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
/// Target writev() handler.
|
|
template <class OS>
|
|
SyscallReturn
|
|
writevFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
|
|
ThreadContext *tc)
|
|
{
|
|
int index = 0;
|
|
int tgt_fd = process->getSyscallArg(tc, index);
|
|
|
|
int sim_fd = process->getSimFD(tgt_fd);
|
|
if (sim_fd < 0)
|
|
return -EBADF;
|
|
|
|
SETranslatingPortProxy &p = tc->getMemProxy();
|
|
uint64_t tiov_base = process->getSyscallArg(tc, index);
|
|
size_t count = process->getSyscallArg(tc, index);
|
|
struct iovec hiov[count];
|
|
for (size_t i = 0; i < count; ++i) {
|
|
typename OS::tgt_iovec tiov;
|
|
|
|
p.readBlob(tiov_base + i*sizeof(typename OS::tgt_iovec),
|
|
(uint8_t*)&tiov, sizeof(typename OS::tgt_iovec));
|
|
hiov[i].iov_len = TheISA::gtoh(tiov.iov_len);
|
|
hiov[i].iov_base = new char [hiov[i].iov_len];
|
|
p.readBlob(TheISA::gtoh(tiov.iov_base), (uint8_t *)hiov[i].iov_base,
|
|
hiov[i].iov_len);
|
|
}
|
|
|
|
int result = writev(sim_fd, hiov, count);
|
|
|
|
for (size_t i = 0; i < count; ++i)
|
|
delete [] (char *)hiov[i].iov_base;
|
|
|
|
if (result < 0)
|
|
return -errno;
|
|
|
|
return result;
|
|
}
|
|
|
|
/// Real mmap handler.
|
|
template <class OS>
|
|
SyscallReturn
|
|
mmapImpl(SyscallDesc *desc, int num, LiveProcess *p, ThreadContext *tc,
|
|
bool is_mmap2)
|
|
{
|
|
int index = 0;
|
|
Addr start = p->getSyscallArg(tc, index);
|
|
uint64_t length = p->getSyscallArg(tc, index);
|
|
int prot = p->getSyscallArg(tc, index);
|
|
int tgt_flags = p->getSyscallArg(tc, index);
|
|
int tgt_fd = p->getSyscallArg(tc, index);
|
|
int offset = p->getSyscallArg(tc, index);
|
|
|
|
if (is_mmap2)
|
|
offset *= TheISA::PageBytes;
|
|
|
|
if (start & (TheISA::PageBytes - 1) ||
|
|
offset & (TheISA::PageBytes - 1) ||
|
|
(tgt_flags & OS::TGT_MAP_PRIVATE &&
|
|
tgt_flags & OS::TGT_MAP_SHARED) ||
|
|
(!(tgt_flags & OS::TGT_MAP_PRIVATE) &&
|
|
!(tgt_flags & OS::TGT_MAP_SHARED)) ||
|
|
!length) {
|
|
return -EINVAL;
|
|
}
|
|
|
|
if ((prot & PROT_WRITE) && (tgt_flags & OS::TGT_MAP_SHARED)) {
|
|
// With shared mmaps, there are two cases to consider:
|
|
// 1) anonymous: writes should modify the mapping and this should be
|
|
// visible to observers who share the mapping. Currently, it's
|
|
// difficult to update the shared mapping because there's no
|
|
// structure which maintains information about the which virtual
|
|
// memory areas are shared. If that structure existed, it would be
|
|
// possible to make the translations point to the same frames.
|
|
// 2) file-backed: writes should modify the mapping and the file
|
|
// which is backed by the mapping. The shared mapping problem is the
|
|
// same as what was mentioned about the anonymous mappings. For
|
|
// file-backed mappings, the writes to the file are difficult
|
|
// because it requires syncing what the mapping holds with the file
|
|
// that resides on the host system. So, any write on a real system
|
|
// would cause the change to be propagated to the file mapping at
|
|
// some point in the future (the inode is tracked along with the
|
|
// mapping). This isn't guaranteed to always happen, but it usually
|
|
// works well enough. The guarantee is provided by the msync system
|
|
// call. We could force the change through with shared mappings with
|
|
// a call to msync, but that again would require more information
|
|
// than we currently maintain.
|
|
warn("mmap: writing to shared mmap region is currently "
|
|
"unsupported. The write succeeds on the target, but it "
|
|
"will not be propagated to the host or shared mappings");
|
|
}
|
|
|
|
length = roundUp(length, TheISA::PageBytes);
|
|
|
|
int sim_fd = -1;
|
|
uint8_t *pmap = nullptr;
|
|
if (!(tgt_flags & OS::TGT_MAP_ANONYMOUS)) {
|
|
// Check for EmulatedDriver mmap
|
|
FDEntry *fde = p->getFDEntry(tgt_fd);
|
|
if (fde == NULL)
|
|
return -EBADF;
|
|
|
|
if (fde->driver != NULL) {
|
|
return fde->driver->mmap(p, tc, start, length, prot,
|
|
tgt_flags, tgt_fd, offset);
|
|
}
|
|
sim_fd = fde->fd;
|
|
|
|
if (sim_fd < 0)
|
|
return -EBADF;
|
|
|
|
pmap = (decltype(pmap))mmap(NULL, length, PROT_READ, MAP_PRIVATE,
|
|
sim_fd, offset);
|
|
|
|
if (pmap == (decltype(pmap))-1) {
|
|
warn("mmap: failed to map file into host address space");
|
|
return -errno;
|
|
}
|
|
}
|
|
|
|
// Extend global mmap region if necessary. Note that we ignore the
|
|
// start address unless MAP_FIXED is specified.
|
|
if (!(tgt_flags & OS::TGT_MAP_FIXED)) {
|
|
start = p->mmapGrowsDown() ? p->mmap_end - length : p->mmap_end;
|
|
p->mmap_end = p->mmapGrowsDown() ? start : p->mmap_end + length;
|
|
}
|
|
|
|
DPRINTF_SYSCALL(Verbose, " mmap range is 0x%x - 0x%x\n",
|
|
start, start + length - 1);
|
|
|
|
// We only allow mappings to overwrite existing mappings if
|
|
// TGT_MAP_FIXED is set. Otherwise it shouldn't be a problem
|
|
// because we ignore the start hint if TGT_MAP_FIXED is not set.
|
|
int clobber = tgt_flags & OS::TGT_MAP_FIXED;
|
|
if (clobber) {
|
|
for (auto tc : p->system->threadContexts) {
|
|
// If we might be overwriting old mappings, we need to
|
|
// invalidate potentially stale mappings out of the TLBs.
|
|
tc->getDTBPtr()->flushAll();
|
|
tc->getITBPtr()->flushAll();
|
|
}
|
|
}
|
|
|
|
// Allocate physical memory and map it in. If the page table is already
|
|
// mapped and clobber is not set, the simulator will issue throw a
|
|
// fatal and bail out of the simulation.
|
|
p->allocateMem(start, length, clobber);
|
|
|
|
// Transfer content into target address space.
|
|
SETranslatingPortProxy &tp = tc->getMemProxy();
|
|
if (tgt_flags & OS::TGT_MAP_ANONYMOUS) {
|
|
// In general, we should zero the mapped area for anonymous mappings,
|
|
// with something like:
|
|
// tp.memsetBlob(start, 0, length);
|
|
// However, given that we don't support sparse mappings, and
|
|
// some applications can map a couple of gigabytes of space
|
|
// (intending sparse usage), that can get painfully expensive.
|
|
// Fortunately, since we don't properly implement munmap either,
|
|
// there's no danger of remapping used memory, so for now all
|
|
// newly mapped memory should already be zeroed so we can skip it.
|
|
} else {
|
|
// It is possible to mmap an area larger than a file, however
|
|
// accessing unmapped portions the system triggers a "Bus error"
|
|
// on the host. We must know when to stop copying the file from
|
|
// the host into the target address space.
|
|
struct stat file_stat;
|
|
if (fstat(sim_fd, &file_stat) > 0)
|
|
fatal("mmap: cannot stat file");
|
|
|
|
// Copy the portion of the file that is resident. This requires
|
|
// checking both the mmap size and the filesize that we are
|
|
// trying to mmap into this space; the mmap size also depends
|
|
// on the specified offset into the file.
|
|
uint64_t size = std::min((uint64_t)file_stat.st_size - offset,
|
|
length);
|
|
tp.writeBlob(start, pmap, size);
|
|
|
|
// Cleanup the mmap region before exiting this function.
|
|
munmap(pmap, length);
|
|
|
|
// Maintain the symbol table for dynamic executables.
|
|
// The loader will call mmap to map the images into its address
|
|
// space and we intercept that here. We can verify that we are
|
|
// executing inside the loader by checking the program counter value.
|
|
// XXX: with multiprogrammed workloads or multi-node configurations,
|
|
// this will not work since there is a single global symbol table.
|
|
ObjectFile *interpreter = p->getInterpreter();
|
|
if (interpreter) {
|
|
Addr text_start = interpreter->textBase();
|
|
Addr text_end = text_start + interpreter->textSize();
|
|
|
|
Addr pc = tc->pcState().pc();
|
|
|
|
if (pc >= text_start && pc < text_end) {
|
|
FDEntry *fde = p->getFDEntry(tgt_fd);
|
|
|
|
ObjectFile *lib = createObjectFile(fde->filename);
|
|
|
|
if (lib) {
|
|
lib->loadAllSymbols(debugSymbolTable,
|
|
lib->textBase(), start);
|
|
}
|
|
}
|
|
}
|
|
|
|
// Note that we do not zero out the remainder of the mapping. This
|
|
// is done by a real system, but it probably will not affect
|
|
// execution (hopefully).
|
|
}
|
|
|
|
return start;
|
|
}
|
|
|
|
template <class OS>
|
|
SyscallReturn
|
|
pwrite64Func(SyscallDesc *desc, int num, LiveProcess *p, ThreadContext *tc)
|
|
{
|
|
int index = 0;
|
|
int tgt_fd = p->getSyscallArg(tc, index);
|
|
Addr bufPtr = p->getSyscallArg(tc, index);
|
|
int nbytes = p->getSyscallArg(tc, index);
|
|
int offset = p->getSyscallArg(tc, index);
|
|
|
|
int sim_fd = p->getSimFD(tgt_fd);
|
|
if (sim_fd < 0)
|
|
return -EBADF;
|
|
|
|
BufferArg bufArg(bufPtr, nbytes);
|
|
bufArg.copyIn(tc->getMemProxy());
|
|
|
|
int bytes_written = pwrite(sim_fd, bufArg.bufferPtr(), nbytes, offset);
|
|
|
|
return (bytes_written == -1) ? -errno : bytes_written;
|
|
}
|
|
|
|
/// Target mmap() handler.
|
|
template <class OS>
|
|
SyscallReturn
|
|
mmapFunc(SyscallDesc *desc, int num, LiveProcess *p, ThreadContext *tc)
|
|
{
|
|
return mmapImpl<OS>(desc, num, p, tc, false);
|
|
}
|
|
|
|
/// Target mmap2() handler.
|
|
template <class OS>
|
|
SyscallReturn
|
|
mmap2Func(SyscallDesc *desc, int num, LiveProcess *p, ThreadContext *tc)
|
|
{
|
|
return mmapImpl<OS>(desc, num, p, tc, true);
|
|
}
|
|
|
|
/// Target getrlimit() handler.
|
|
template <class OS>
|
|
SyscallReturn
|
|
getrlimitFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
|
|
ThreadContext *tc)
|
|
{
|
|
int index = 0;
|
|
unsigned resource = process->getSyscallArg(tc, index);
|
|
TypedBufferArg<typename OS::rlimit> rlp(process->getSyscallArg(tc, index));
|
|
|
|
switch (resource) {
|
|
case OS::TGT_RLIMIT_STACK:
|
|
// max stack size in bytes: make up a number (8MB for now)
|
|
rlp->rlim_cur = rlp->rlim_max = 8 * 1024 * 1024;
|
|
rlp->rlim_cur = TheISA::htog(rlp->rlim_cur);
|
|
rlp->rlim_max = TheISA::htog(rlp->rlim_max);
|
|
break;
|
|
|
|
case OS::TGT_RLIMIT_DATA:
|
|
// max data segment size in bytes: make up a number
|
|
rlp->rlim_cur = rlp->rlim_max = 256 * 1024 * 1024;
|
|
rlp->rlim_cur = TheISA::htog(rlp->rlim_cur);
|
|
rlp->rlim_max = TheISA::htog(rlp->rlim_max);
|
|
break;
|
|
|
|
default:
|
|
warn("getrlimit: unimplemented resource %d", resource);
|
|
return -EINVAL;
|
|
break;
|
|
}
|
|
|
|
rlp.copyOut(tc->getMemProxy());
|
|
return 0;
|
|
}
|
|
|
|
/// Target clock_gettime() function.
|
|
template <class OS>
|
|
SyscallReturn
|
|
clock_gettimeFunc(SyscallDesc *desc, int num, LiveProcess *p, ThreadContext *tc)
|
|
{
|
|
int index = 1;
|
|
//int clk_id = p->getSyscallArg(tc, index);
|
|
TypedBufferArg<typename OS::timespec> tp(p->getSyscallArg(tc, index));
|
|
|
|
getElapsedTimeNano(tp->tv_sec, tp->tv_nsec);
|
|
tp->tv_sec += seconds_since_epoch;
|
|
tp->tv_sec = TheISA::htog(tp->tv_sec);
|
|
tp->tv_nsec = TheISA::htog(tp->tv_nsec);
|
|
|
|
tp.copyOut(tc->getMemProxy());
|
|
|
|
return 0;
|
|
}
|
|
|
|
/// Target clock_getres() function.
|
|
template <class OS>
|
|
SyscallReturn
|
|
clock_getresFunc(SyscallDesc *desc, int num, LiveProcess *p, ThreadContext *tc)
|
|
{
|
|
int index = 1;
|
|
TypedBufferArg<typename OS::timespec> tp(p->getSyscallArg(tc, index));
|
|
|
|
// Set resolution at ns, which is what clock_gettime() returns
|
|
tp->tv_sec = 0;
|
|
tp->tv_nsec = 1;
|
|
|
|
tp.copyOut(tc->getMemProxy());
|
|
|
|
return 0;
|
|
}
|
|
|
|
/// Target gettimeofday() handler.
|
|
template <class OS>
|
|
SyscallReturn
|
|
gettimeofdayFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
|
|
ThreadContext *tc)
|
|
{
|
|
int index = 0;
|
|
TypedBufferArg<typename OS::timeval> tp(process->getSyscallArg(tc, index));
|
|
|
|
getElapsedTimeMicro(tp->tv_sec, tp->tv_usec);
|
|
tp->tv_sec += seconds_since_epoch;
|
|
tp->tv_sec = TheISA::htog(tp->tv_sec);
|
|
tp->tv_usec = TheISA::htog(tp->tv_usec);
|
|
|
|
tp.copyOut(tc->getMemProxy());
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
/// Target utimes() handler.
|
|
template <class OS>
|
|
SyscallReturn
|
|
utimesFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
|
|
ThreadContext *tc)
|
|
{
|
|
std::string path;
|
|
|
|
int index = 0;
|
|
if (!tc->getMemProxy().tryReadString(path,
|
|
process->getSyscallArg(tc, index))) {
|
|
return -EFAULT;
|
|
}
|
|
|
|
TypedBufferArg<typename OS::timeval [2]>
|
|
tp(process->getSyscallArg(tc, index));
|
|
tp.copyIn(tc->getMemProxy());
|
|
|
|
struct timeval hostTimeval[2];
|
|
for (int i = 0; i < 2; ++i)
|
|
{
|
|
hostTimeval[i].tv_sec = TheISA::gtoh((*tp)[i].tv_sec);
|
|
hostTimeval[i].tv_usec = TheISA::gtoh((*tp)[i].tv_usec);
|
|
}
|
|
|
|
// Adjust path for current working directory
|
|
path = process->fullPath(path);
|
|
|
|
int result = utimes(path.c_str(), hostTimeval);
|
|
|
|
if (result < 0)
|
|
return -errno;
|
|
|
|
return 0;
|
|
}
|
|
/// Target getrusage() function.
|
|
template <class OS>
|
|
SyscallReturn
|
|
getrusageFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
|
|
ThreadContext *tc)
|
|
{
|
|
int index = 0;
|
|
int who = process->getSyscallArg(tc, index); // THREAD, SELF, or CHILDREN
|
|
TypedBufferArg<typename OS::rusage> rup(process->getSyscallArg(tc, index));
|
|
|
|
rup->ru_utime.tv_sec = 0;
|
|
rup->ru_utime.tv_usec = 0;
|
|
rup->ru_stime.tv_sec = 0;
|
|
rup->ru_stime.tv_usec = 0;
|
|
rup->ru_maxrss = 0;
|
|
rup->ru_ixrss = 0;
|
|
rup->ru_idrss = 0;
|
|
rup->ru_isrss = 0;
|
|
rup->ru_minflt = 0;
|
|
rup->ru_majflt = 0;
|
|
rup->ru_nswap = 0;
|
|
rup->ru_inblock = 0;
|
|
rup->ru_oublock = 0;
|
|
rup->ru_msgsnd = 0;
|
|
rup->ru_msgrcv = 0;
|
|
rup->ru_nsignals = 0;
|
|
rup->ru_nvcsw = 0;
|
|
rup->ru_nivcsw = 0;
|
|
|
|
switch (who) {
|
|
case OS::TGT_RUSAGE_SELF:
|
|
getElapsedTimeMicro(rup->ru_utime.tv_sec, rup->ru_utime.tv_usec);
|
|
rup->ru_utime.tv_sec = TheISA::htog(rup->ru_utime.tv_sec);
|
|
rup->ru_utime.tv_usec = TheISA::htog(rup->ru_utime.tv_usec);
|
|
break;
|
|
|
|
case OS::TGT_RUSAGE_CHILDREN:
|
|
// do nothing. We have no child processes, so they take no time.
|
|
break;
|
|
|
|
default:
|
|
// don't really handle THREAD or CHILDREN, but just warn and
|
|
// plow ahead
|
|
warn("getrusage() only supports RUSAGE_SELF. Parameter %d ignored.",
|
|
who);
|
|
}
|
|
|
|
rup.copyOut(tc->getMemProxy());
|
|
|
|
return 0;
|
|
}
|
|
|
|
/// Target times() function.
|
|
template <class OS>
|
|
SyscallReturn
|
|
timesFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
|
|
ThreadContext *tc)
|
|
{
|
|
int index = 0;
|
|
TypedBufferArg<typename OS::tms> bufp(process->getSyscallArg(tc, index));
|
|
|
|
// Fill in the time structure (in clocks)
|
|
int64_t clocks = curTick() * OS::M5_SC_CLK_TCK / SimClock::Int::s;
|
|
bufp->tms_utime = clocks;
|
|
bufp->tms_stime = 0;
|
|
bufp->tms_cutime = 0;
|
|
bufp->tms_cstime = 0;
|
|
|
|
// Convert to host endianness
|
|
bufp->tms_utime = TheISA::htog(bufp->tms_utime);
|
|
|
|
// Write back
|
|
bufp.copyOut(tc->getMemProxy());
|
|
|
|
// Return clock ticks since system boot
|
|
return clocks;
|
|
}
|
|
|
|
/// Target time() function.
|
|
template <class OS>
|
|
SyscallReturn
|
|
timeFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
|
|
ThreadContext *tc)
|
|
{
|
|
typename OS::time_t sec, usec;
|
|
getElapsedTimeMicro(sec, usec);
|
|
sec += seconds_since_epoch;
|
|
|
|
int index = 0;
|
|
Addr taddr = (Addr)process->getSyscallArg(tc, index);
|
|
if (taddr != 0) {
|
|
typename OS::time_t t = sec;
|
|
t = TheISA::htog(t);
|
|
SETranslatingPortProxy &p = tc->getMemProxy();
|
|
p.writeBlob(taddr, (uint8_t*)&t, (int)sizeof(typename OS::time_t));
|
|
}
|
|
return sec;
|
|
}
|
|
|
|
|
|
#endif // __SIM_SYSCALL_EMUL_HH__
|