#include "sim/syscall_emul.hh"
#include <fcntl.h>
#include <sys/syscall.h>
#include <unistd.h>
#include <csignal>
#include <iostream>
#include <mutex>
#include <string>
#include <unordered_map>
#include "arch/utility.hh"
#include "base/chunk_generator.hh"
#include "base/trace.hh"
#include "config/the_isa.hh"
#include "cpu/thread_context.hh"
#include "dev/net/dist_iface.hh"
#include "mem/page_table.hh"
#include "sim/byteswap.hh"
#include "sim/process.hh"
#include "sim/sim_exit.hh"
#include "sim/syscall_debug_macros.hh"
#include "sim/syscall_desc.hh"
#include "sim/system.hh"

Functions
void	warnUnsupportedOS (std::string syscall_name)

SyscallReturn	unimplementedFunc (SyscallDesc desc, ThreadContext tc)
	Handler for unimplemented syscalls that we haven't thought about. More...

SyscallReturn	ignoreFunc (SyscallDesc desc, ThreadContext tc)
	Handler for unimplemented syscalls that we never intend to implement (signal handling, etc.) and should not affect the correct behavior of the program. More...

SyscallReturn	ignoreWarnOnceFunc (SyscallDesc desc, ThreadContext tc)
	Like above, but only prints a warning once per syscall desc it's used with. More...

static void	exitFutexWake (ThreadContext *tc, Addr addr, uint64_t tgid)

static SyscallReturn	exitImpl (SyscallDesc desc, ThreadContext tc, bool group, int status)

SyscallReturn	exitFunc (SyscallDesc desc, ThreadContext tc, int status)
	Target exit() handler: terminate current context. More...

SyscallReturn	exitGroupFunc (SyscallDesc desc, ThreadContext tc, int status)
	Target exit_group() handler: terminate simulation. (exit all threads) More...

SyscallReturn	getpagesizeFunc (SyscallDesc desc, ThreadContext tc)
	Target getpagesize() handler. More...

SyscallReturn	brkFunc (SyscallDesc desc, ThreadContext tc, Addr new_brk)
	Target brk() handler: set brk address. More...

SyscallReturn	setTidAddressFunc (SyscallDesc desc, ThreadContext tc, uint64_t tidPtr)
	Target set_tid_address() handler. More...

SyscallReturn	closeFunc (SyscallDesc desc, ThreadContext tc, int tgt_fd)
	Target close() handler. More...

SyscallReturn	lseekFunc (SyscallDesc desc, ThreadContext tc, int tgt_fd, uint64_t offs, int whence)
	Target lseek() handler. More...

SyscallReturn	_llseekFunc (SyscallDesc desc, ThreadContext tc, int tgt_fd, uint64_t offset_high, uint32_t offset_low, Addr result_ptr, int whence)
	Target _llseek() handler. More...

SyscallReturn	munmapFunc (SyscallDesc desc, ThreadContext tc, Addr start, size_t length)
	Target munmap() handler. More...

SyscallReturn	gethostnameFunc (SyscallDesc desc, ThreadContext tc, Addr buf_ptr, int name_len)
	Target gethostname() handler. More...

SyscallReturn	getcwdFunc (SyscallDesc desc, ThreadContext tc, Addr buf_ptr, unsigned long size)
	Target getcwd() handler. More...

SyscallReturn	readlinkFunc (SyscallDesc desc, ThreadContext tc, Addr pathname, Addr buf_ptr, size_t bufsiz)
	Target readlink() handler. More...

SyscallReturn	unlinkFunc (SyscallDesc desc, ThreadContext tc, Addr pathname)
	Target unlink() handler. More...

SyscallReturn	linkFunc (SyscallDesc desc, ThreadContext tc, Addr pathname, Addr new_pathname)
	Target link() handler. More...

SyscallReturn	symlinkFunc (SyscallDesc desc, ThreadContext tc, Addr pathname, Addr new_pathname)
	Target symlink() handler. More...

SyscallReturn	mkdirFunc (SyscallDesc desc, ThreadContext tc, Addr pathname, mode_t mode)
	Target mkdir() handler. More...

SyscallReturn	renameFunc (SyscallDesc desc, ThreadContext tc, Addr oldpath, Addr newpath)
	Target rename() handler. More...

SyscallReturn	truncateFunc (SyscallDesc desc, ThreadContext tc, Addr pathname, off_t length)
	Target truncate() handler. More...

SyscallReturn	ftruncateFunc (SyscallDesc desc, ThreadContext tc, int tgt_fd, off_t length)
	Target ftruncate() handler. More...

SyscallReturn	truncate64Func (SyscallDesc desc, ThreadContext tc, Addr pathname, int64_t length)
	Target truncate64() handler. More...

SyscallReturn	ftruncate64Func (SyscallDesc desc, ThreadContext tc, int tgt_fd, int64_t length)
	Target ftruncate64() handler. More...

SyscallReturn	umaskFunc (SyscallDesc desc, ThreadContext tc)
	Target umask() handler. More...

SyscallReturn	chownFunc (SyscallDesc desc, ThreadContext tc, Addr pathname, uint32_t owner, uint32_t group)
	Target chown() handler. More...

SyscallReturn	fchownFunc (SyscallDesc desc, ThreadContext tc, int tgt_fd, uint32_t owner, uint32_t group)
	Target fchown() handler. More...

SyscallReturn	dupFunc (SyscallDesc desc, ThreadContext tc, int tgt_fd)
	FIXME: The file description is not shared among file descriptors created with dup. More...

SyscallReturn	dup2Func (SyscallDesc desc, ThreadContext tc, int old_tgt_fd, int new_tgt_fd)
	Target dup2() handler. More...

SyscallReturn	fcntlFunc (SyscallDesc desc, ThreadContext tc, int tgt_fd, int cmd, GuestABI::VarArgs< int > varargs)
	Target fcntl() handler. More...

SyscallReturn	fcntl64Func (SyscallDesc desc, ThreadContext tc, int tgt_fd, int cmd)
	Target fcntl64() handler. More...

SyscallReturn	pipePseudoFunc (SyscallDesc desc, ThreadContext tc)
	Pseudo Funcs - These functions use a different return convension, returning a second value in a register other than the normal return register. More...

SyscallReturn	pipeFunc (SyscallDesc desc, ThreadContext tc, Addr tgt_addr)
	Target pipe() handler. More...

SyscallReturn	pipe2Func (SyscallDesc desc, ThreadContext tc, Addr tgt_addr, int flags)
	Target pipe() handler. More...

SyscallReturn	getpgrpFunc (SyscallDesc desc, ThreadContext tc)
	Target getpgrpFunc() handler. More...

SyscallReturn	setpgidFunc (SyscallDesc desc, ThreadContext tc, int pid, int pgid)
	Target setpgid() handler. More...

SyscallReturn	getpidFunc (SyscallDesc desc, ThreadContext tc)
	Target getpid() handler. More...

SyscallReturn	gettidFunc (SyscallDesc desc, ThreadContext tc)
	Target gettid() handler. More...

SyscallReturn	getppidFunc (SyscallDesc desc, ThreadContext tc)
	Target getppid() handler. More...

SyscallReturn	getuidFunc (SyscallDesc desc, ThreadContext tc)

SyscallReturn	geteuidFunc (SyscallDesc desc, ThreadContext tc)
	Target geteuid() handler. More...

SyscallReturn	getgidFunc (SyscallDesc desc, ThreadContext tc)
	Target getgid() handler. More...

SyscallReturn	getegidFunc (SyscallDesc desc, ThreadContext tc)
	Target getegid() handler. More...

SyscallReturn	fallocateFunc (SyscallDesc desc, ThreadContext tc, int tgt_fd, int mode, off_t offset, off_t len)

SyscallReturn	accessFunc (SyscallDesc desc, ThreadContext tc, Addr pathname, mode_t mode)
	Target access() handler. More...

SyscallReturn	mknodFunc (SyscallDesc desc, ThreadContext tc, Addr pathname, mode_t mode, dev_t dev)
	Target mknod() handler. More...

SyscallReturn	chdirFunc (SyscallDesc desc, ThreadContext tc, Addr pathname)
	Target chdir() handler. More...

SyscallReturn	rmdirFunc (SyscallDesc desc, ThreadContext tc, Addr pathname)

SyscallReturn	shutdownFunc (SyscallDesc desc, ThreadContext tc, int tgt_fd, int how)
	Target shutdown() handler. More...

SyscallReturn	bindFunc (SyscallDesc desc, ThreadContext tc, int tgt_fd, Addr buf_ptr, int addrlen)

SyscallReturn	listenFunc (SyscallDesc desc, ThreadContext tc, int tgt_fd, int backlog)

SyscallReturn	connectFunc (SyscallDesc desc, ThreadContext tc, int tgt_fd, Addr buf_ptr, int addrlen)

SyscallReturn	recvfromFunc (SyscallDesc desc, ThreadContext tc, int tgt_fd, Addr bufrPtr, size_t bufrLen, int flags, Addr addrPtr, Addr addrlenPtr)

SyscallReturn	sendtoFunc (SyscallDesc desc, ThreadContext tc, int tgt_fd, Addr bufrPtr, size_t bufrLen, int flags, Addr addrPtr, socklen_t addrLen)

SyscallReturn	recvmsgFunc (SyscallDesc desc, ThreadContext tc, int tgt_fd, Addr msgPtr, int flags)

SyscallReturn	sendmsgFunc (SyscallDesc desc, ThreadContext tc, int tgt_fd, Addr msgPtr, int flags)

SyscallReturn	getsockoptFunc (SyscallDesc desc, ThreadContext tc, int tgt_fd, int level, int optname, Addr valPtr, Addr lenPtr)

SyscallReturn	getsocknameFunc (SyscallDesc desc, ThreadContext tc, int tgt_fd, Addr addrPtr, Addr lenPtr)

SyscallReturn	getpeernameFunc (SyscallDesc desc, ThreadContext tc, int tgt_fd, Addr sockAddrPtr, Addr addrlenPtr)

SyscallReturn	setsockoptFunc (SyscallDesc desc, ThreadContext tc, int tgt_fd, int level, int optname, Addr valPtr, socklen_t len)

Variables
const char *	hostname = "m5.eecs.umich.edu"

Function Documentation

◆ _llseekFunc()

SyscallReturn _llseekFunc	(	SyscallDesc *	desc,
		ThreadContext *	tc,
		int	tgt_fd,
		uint64_t	offset_high,
		uint32_t	offset_low,
		Addr	result_ptr,
		int	whence
	)

Target _llseek() handler.

Definition at line 302 of file syscall_emul.cc.

References BufferArg::bufferPtr(), BaseBufferArg::copyOut(), System::getGuestByteOrder(), ThreadContext::getProcessPtr(), ThreadContext::getSystemPtr(), ThreadContext::getVirtProxy(), htog(), ArmISA::offset, and MipsISA::p.

Referenced by SparcISA::getresuidFunc(), SyscallTable32::SyscallTable32(), and unameFunc().

◆ accessFunc()

SyscallReturn accessFunc	(	SyscallDesc *	desc,
		ThreadContext *	tc,
		Addr	pathname,
		mode_t	mode
	)

Target access() handler.

Definition at line 997 of file syscall_emul.cc.

References ThreadContext::getProcessPtr(), ThreadContext::getVirtProxy(), ArmISA::mode, MipsISA::p, and PortProxy::tryReadString().

Referenced by faccessatFunc(), SyscallTable32::SyscallTable32(), SyscallTable64::SyscallTable64(), and unameFunc32().

◆ bindFunc()

SyscallReturn bindFunc	(	SyscallDesc *	desc,
		ThreadContext *	tc,
		int	tgt_fd,
		Addr	buf_ptr,
		int	addrlen
	)

Definition at line 1161 of file syscall_emul.cc.

References BufferArg::bufferPtr(), BaseBufferArg::copyIn(), ThreadContext::getProcessPtr(), ThreadContext::getVirtProxy(), MipsISA::p, and ArmISA::status.

◆ brkFunc()

SyscallReturn brkFunc	(	SyscallDesc *	desc,
		ThreadContext *	tc,
		Addr	new_brk
	)

Target brk() handler: set brk address.

Definition at line 247 of file syscall_emul.cc.

References DPRINTF_SYSCALL, ThreadContext::getProcessPtr(), and MipsISA::p.

Referenced by SparcISA::getresuidFunc(), setThreadAreaFunc(), SyscallTable32::SyscallTable32(), SyscallTable64::SyscallTable64(), unameFunc(), and unameFunc32().

◆ chdirFunc()

SyscallReturn chdirFunc	(	SyscallDesc *	desc,
		ThreadContext *	tc,
		Addr	pathname
	)

Target chdir() handler.

Definition at line 1028 of file syscall_emul.cc.

References ThreadContext::getProcessPtr(), ThreadContext::getVirtProxy(), MipsISA::p, startswith(), and PortProxy::tryReadString().

◆ chownFunc()

SyscallReturn chownFunc	(	SyscallDesc *	desc,
		ThreadContext *	tc,
		Addr	pathname,
		uint32_t	owner,
		uint32_t	group
	)

Target chown() handler.

Definition at line 623 of file syscall_emul.cc.

References ThreadContext::getProcessPtr(), ThreadContext::getVirtProxy(), MipsISA::p, and PortProxy::tryReadString().

Referenced by SparcISA::getresuidFunc(), setThreadAreaFunc(), SyscallTable32::SyscallTable32(), unameFunc(), and unameFunc32().

◆ closeFunc()

SyscallReturn closeFunc	(	SyscallDesc *	desc,
		ThreadContext *	tc,
		int	tgt_fd
	)

Target close() handler.

Definition at line 278 of file syscall_emul.cc.

References ThreadContext::getProcessPtr(), and MipsISA::p.

Referenced by SparcISA::getresuidFunc(), setThreadAreaFunc(), SyscallTable32::SyscallTable32(), SyscallTable64::SyscallTable64(), unameFunc(), and unameFunc32().

◆ connectFunc()

SyscallReturn connectFunc	(	SyscallDesc *	desc,
		ThreadContext *	tc,
		int	tgt_fd,
		Addr	buf_ptr,
		int	addrlen
	)

Definition at line 1197 of file syscall_emul.cc.

References addr, BufferArg::bufferPtr(), BaseBufferArg::copyIn(), ThreadContext::getProcessPtr(), ThreadContext::getVirtProxy(), MipsISA::p, and ArmISA::status.

◆ dup2Func()

SyscallReturn dup2Func	(	SyscallDesc *	desc,
		ThreadContext *	tc,
		int	old_tgt_fd,
		int	new_tgt_fd
	)

Target dup2() handler.

We need a valid host file descriptor number to be able to pass into the second parameter for dup2 (newfd), but we don't know what the viable numbers are; we execute the open call to retrieve one.

Definition at line 689 of file syscall_emul.cc.

References ThreadContext::getProcessPtr(), and MipsISA::p.

Referenced by unameFunc32().

◆ dupFunc()

SyscallReturn dupFunc	(	SyscallDesc *	desc,
		ThreadContext *	tc,
		int	tgt_fd
	)

FIXME: The file description is not shared among file descriptors created with dup.

Target dup() handler.

Really, it's difficult to maintain fields like file offset or flags since an update to such a field won't be reflected in the metadata for the fd entries that we maintain for checkpoint restoration.

Definition at line 669 of file syscall_emul.cc.

References ThreadContext::getProcessPtr(), and MipsISA::p.

Referenced by SyscallTable32::SyscallTable32(), SyscallTable64::SyscallTable64(), unameFunc(), and unameFunc32().

◆ exitFunc()

SyscallReturn exitFunc	(	SyscallDesc *	desc,
		ThreadContext *	tc,
		int	status
	)

Target exit() handler: terminate current context.

Definition at line 228 of file syscall_emul.cc.

References exitImpl().

Referenced by SparcISA::getresuidFunc(), setThreadAreaFunc(), SyscallTable32::SyscallTable32(), SyscallTable64::SyscallTable64(), unameFunc(), and unameFunc32().

◆ exitFutexWake()

static void exitFutexWake	(	ThreadContext *	tc,
		Addr	addr,
		uint64_t	tgid
	)

static

Definition at line 94 of file syscall_emul.cc.

References BufferArg::bufferPtr(), BaseBufferArg::copyOut(), System::futexMap, ThreadContext::getSystemPtr(), ThreadContext::getVirtProxy(), and FutexMap::wakeup().

Referenced by exitImpl().

◆ exitGroupFunc()

SyscallReturn exitGroupFunc	(	SyscallDesc *	desc,
		ThreadContext *	tc,
		int	status
	)

Target exit_group() handler: terminate simulation. (exit all threads)

Definition at line 234 of file syscall_emul.cc.

References exitImpl().

Referenced by SparcISA::getresuidFunc(), SyscallTable32::SyscallTable32(), SyscallTable64::SyscallTable64(), tgkillFunc(), unameFunc(), and unameFunc32().

◆ exitImpl()

static SyscallReturn exitImpl	(	SyscallDesc *	desc,
		ThreadContext *	tc,
		bool	group,
		int	status
	)

static

Threads in a thread group require special handing. For instance, we send the SIGCHLD signal so that it appears that it came from the head of the group. We also only delete file descriptors if we are the last thread in the thread group.

Check if we share thread group with the pointer; this denotes that we are not the last thread active in the thread group. Note that setting this to false also prevents further iterations of the loop.

If p is trying to exit_group and both walk and p are in the same thread group (i.e., sharing the same tgid), we need to halt walk's thread context. After all threads except p are halted, p becomes the last thread in the group.

If p is not doing exit_group and there exists another active thread context in the group, last_thread is set to false to prevent the parent thread from killing all threads in the group.

A corner case exists which involves execve(). After execve(), the execve will enable SIGCHLD in the process. The problem occurs when the exiting process is the root process in the system; there is no parent to receive the signal. We obviate this problem by setting the root process' ppid to zero in the Python configuration files. We really should handle the root/execve specific case more gracefully.

Run though FD array of the exiting process and close all file descriptors except for the standard file descriptors. (The standard file descriptors are shared with gem5.)

check to see if there is no more active thread in the system. If so, exit the simulation loop

Even though we are terminating the final thread context, dist-gem5 requires the simulation to remain active and provide synchronization messages to the switch process. So we just halt the last thread context and return. The simulation will be terminated by dist-gem5 in a coordinated manner once all nodes have signaled their readiness to exit. For non dist-gem5 simulations, readyToExit() always returns true.

Definition at line 108 of file syscall_emul.cc.

References exitFutexWake(), exitSimLoop(), ThreadContext::getProcessPtr(), ThreadContext::getSystemPtr(), ThreadContext::halt(), ThreadContext::Halted, ThreadContext::Halting, ArmISA::i, System::numContexts(), MipsISA::p, Process::pid(), DistIface::readyToExit(), System::signalList, ArmISA::status, X86ISA::system, System::systemList, Process::tgid(), and System::threadContexts.

Referenced by exitFunc(), and exitGroupFunc().

◆ fallocateFunc()

SyscallReturn fallocateFunc	(	SyscallDesc *	desc,
		ThreadContext *	tc,
		int	tgt_fd,
		int	mode,
		off_t	offset,
		off_t	len
	)

Definition at line 975 of file syscall_emul.cc.

References ThreadContext::getProcessPtr(), MipsISA::p, and warnUnsupportedOS().

Referenced by unameFunc32().

◆ fchownFunc()

SyscallReturn fchownFunc	(	SyscallDesc *	desc,
		ThreadContext *	tc,
		int	tgt_fd,
		uint32_t	owner,
		uint32_t	group
	)

Target fchown() handler.

Definition at line 644 of file syscall_emul.cc.

References ThreadContext::getProcessPtr(), and MipsISA::p.

Referenced by setThreadAreaFunc(), and unameFunc32().

◆ fcntl64Func()

SyscallReturn fcntl64Func	(	SyscallDesc *	desc,
		ThreadContext *	tc,
		int	tgt_fd,
		int	cmd
	)

Target fcntl64() handler.

Definition at line 759 of file syscall_emul.cc.

References ThreadContext::getProcessPtr(), MipsISA::p, and warn.

Referenced by setThreadAreaFunc(), SyscallTable32::SyscallTable32(), SyscallTable64::SyscallTable64(), unameFunc(), and unameFunc32().

◆ fcntlFunc()

SyscallReturn fcntlFunc	(	SyscallDesc *	desc,
		ThreadContext *	tc,
		int	tgt_fd,
		int	cmd,
		GuestABI::VarArgs< int >	varargs
	)

Target fcntl() handler.

Definition at line 717 of file syscall_emul.cc.

References GuestABI::VarArgs< Types >::get(), ThreadContext::getProcessPtr(), MipsISA::p, and warn.

Referenced by setThreadAreaFunc(), SyscallTable32::SyscallTable32(), SyscallTable64::SyscallTable64(), unameFunc(), and unameFunc32().

◆ ftruncate64Func()

SyscallReturn ftruncate64Func	(	SyscallDesc *	desc,
		ThreadContext *	tc,
		int	tgt_fd,
		int64_t	length
	)

Target ftruncate64() handler.

Definition at line 593 of file syscall_emul.cc.

References ThreadContext::getProcessPtr(), and MipsISA::p.

Referenced by SyscallTable32::SyscallTable32(), SyscallTable64::SyscallTable64(), unameFunc(), and unameFunc32().

◆ ftruncateFunc()

SyscallReturn ftruncateFunc	(	SyscallDesc *	desc,
		ThreadContext *	tc,
		int	tgt_fd,
		off_t	length
	)

Target ftruncate() handler.

Definition at line 558 of file syscall_emul.cc.

References ThreadContext::getProcessPtr(), and MipsISA::p.

Referenced by setThreadAreaFunc(), SyscallTable32::SyscallTable32(), SyscallTable64::SyscallTable64(), unameFunc(), and unameFunc32().

◆ getcwdFunc()

SyscallReturn getcwdFunc	(	SyscallDesc *	desc,
		ThreadContext *	tc,
		Addr	buf_ptr,
		unsigned long	size
	)

Target getcwd() handler.

Definition at line 362 of file syscall_emul.cc.

References BufferArg::bufferPtr(), BaseBufferArg::copyOut(), ThreadContext::getProcessPtr(), ThreadContext::getVirtProxy(), and MipsISA::p.

Referenced by SparcISA::getresuidFunc(), setThreadAreaFunc(), SyscallTable32::SyscallTable32(), SyscallTable64::SyscallTable64(), and unameFunc32().

◆ getegidFunc()

SyscallReturn getegidFunc	(	SyscallDesc *	desc,
		ThreadContext *	tc
	)

Target getegid() handler.

Definition at line 968 of file syscall_emul.cc.

References Process::egid(), and ThreadContext::getProcessPtr().

Referenced by SparcISA::getresuidFunc(), setThreadAreaFunc(), SyscallTable32::SyscallTable32(), SyscallTable64::SyscallTable64(), unameFunc(), and unameFunc32().

◆ geteuidFunc()

SyscallReturn geteuidFunc	(	SyscallDesc *	desc,
		ThreadContext *	tc
	)

Target geteuid() handler.

Definition at line 954 of file syscall_emul.cc.

References Process::euid(), and ThreadContext::getProcessPtr().

Referenced by SparcISA::getresuidFunc(), setThreadAreaFunc(), SyscallTable32::SyscallTable32(), SyscallTable64::SyscallTable64(), unameFunc(), and unameFunc32().

◆ getgidFunc()

SyscallReturn getgidFunc	(	SyscallDesc *	desc,
		ThreadContext *	tc
	)

Target getgid() handler.

Definition at line 961 of file syscall_emul.cc.

References ThreadContext::getProcessPtr(), and Process::gid().

Referenced by SparcISA::getresuidFunc(), setThreadAreaFunc(), SyscallTable32::SyscallTable32(), SyscallTable64::SyscallTable64(), unameFunc(), and unameFunc32().

◆ gethostnameFunc()

SyscallReturn gethostnameFunc	(	SyscallDesc *	desc,
		ThreadContext *	tc,
		Addr	buf_ptr,
		int	name_len
	)

Target gethostname() handler.

Definition at line 352 of file syscall_emul.cc.

References BufferArg::bufferPtr(), BaseBufferArg::copyOut(), ThreadContext::getVirtProxy(), hostname, and name().

Referenced by setThreadAreaFunc(), and unameFunc().

◆ getpagesizeFunc()

SyscallReturn getpagesizeFunc	(	SyscallDesc *	desc,
		ThreadContext *	tc
	)

Target getpagesize() handler.

Definition at line 240 of file syscall_emul.cc.

References ArmISA::PageBytes.

Referenced by setThreadAreaFunc(), and unameFunc().

◆ getpeernameFunc()

SyscallReturn getpeernameFunc	(	SyscallDesc *	desc,
		ThreadContext *	tc,
		int	tgt_fd,
		Addr	sockAddrPtr,
		Addr	addrlenPtr
	)

Definition at line 1590 of file syscall_emul.cc.

References BufferArg::bufferPtr(), BaseBufferArg::copyIn(), BaseBufferArg::copyOut(), ThreadContext::getProcessPtr(), ThreadContext::getVirtProxy(), and MipsISA::p.

◆ getpgrpFunc()

SyscallReturn getpgrpFunc	(	SyscallDesc *	desc,
		ThreadContext *	tc
	)

Target getpgrpFunc() handler.

Definition at line 885 of file syscall_emul.cc.

References ThreadContext::getProcessPtr(), and Process::pgid().

◆ getpidFunc()

SyscallReturn getpidFunc	(	SyscallDesc *	desc,
		ThreadContext *	tc
	)

Target getpid() handler.

Definition at line 926 of file syscall_emul.cc.

References ThreadContext::getProcessPtr(), and Process::tgid().

Referenced by SparcISA::getresuidFunc(), setThreadAreaFunc(), SyscallTable32::SyscallTable32(), SyscallTable64::SyscallTable64(), unameFunc(), and unameFunc32().

◆ getppidFunc()

SyscallReturn getppidFunc	(	SyscallDesc *	desc,
		ThreadContext *	tc
	)

Target getppid() handler.

Definition at line 940 of file syscall_emul.cc.

References ThreadContext::getProcessPtr(), and Process::ppid().

Referenced by SparcISA::getresuidFunc(), SyscallTable32::SyscallTable32(), SyscallTable64::SyscallTable64(), and unameFunc32().

◆ getsocknameFunc()

SyscallReturn getsocknameFunc	(	SyscallDesc *	desc,
		ThreadContext *	tc,
		int	tgt_fd,
		Addr	addrPtr,
		Addr	lenPtr
	)

Definition at line 1553 of file syscall_emul.cc.

References BufferArg::bufferPtr(), BaseBufferArg::copyIn(), BaseBufferArg::copyOut(), ThreadContext::getProcessPtr(), ThreadContext::getVirtProxy(), ArmISA::len, MipsISA::p, ArmISA::sa, and ArmISA::status.

◆ getsockoptFunc()

SyscallReturn getsockoptFunc	(	SyscallDesc *	desc,
		ThreadContext *	tc,
		int	tgt_fd,
		int	level,
		int	optname,
		Addr	valPtr,
		Addr	lenPtr
	)

Definition at line 1515 of file syscall_emul.cc.

References BufferArg::bufferPtr(), BaseBufferArg::copyOut(), ThreadContext::getProcessPtr(), ThreadContext::getVirtProxy(), ArmISA::len, MipsISA::p, ArmISA::status, and X86ISA::val.

◆ gettidFunc()

SyscallReturn gettidFunc	(	SyscallDesc *	desc,
		ThreadContext *	tc
	)

Target gettid() handler.

Definition at line 933 of file syscall_emul.cc.

References ThreadContext::getProcessPtr(), and Process::pid().

Referenced by SyscallTable32::SyscallTable32(), SyscallTable64::SyscallTable64(), and unameFunc32().

◆ getuidFunc()

SyscallReturn getuidFunc	(	SyscallDesc *	desc,
		ThreadContext *	tc
	)

Definition at line 947 of file syscall_emul.cc.

References ThreadContext::getProcessPtr(), and Process::uid().

Referenced by SparcISA::getresuidFunc(), setThreadAreaFunc(), SyscallTable32::SyscallTable32(), SyscallTable64::SyscallTable64(), unameFunc(), and unameFunc32().

◆ ignoreFunc()

SyscallReturn ignoreFunc	(	SyscallDesc *	desc,
		ThreadContext *	tc
	)

Handler for unimplemented syscalls that we never intend to implement (signal handling, etc.) and should not affect the correct behavior of the program.

Prints a warning. Return success to the target program.

Definition at line 72 of file syscall_emul.cc.

References SyscallDesc::name(), and warn.

Referenced by SparcISA::getresuidFunc(), setThreadAreaFunc(), SyscallTable32::SyscallTable32(), SyscallTable64::SyscallTable64(), unameFunc(), and unameFunc32().

◆ ignoreWarnOnceFunc()

SyscallReturn ignoreWarnOnceFunc	(	SyscallDesc *	desc,
		ThreadContext *	tc
	)

Like above, but only prints a warning once per syscall desc it's used with.

Definition at line 79 of file syscall_emul.cc.

References SyscallDesc::name(), and warn.

Referenced by SyscallTable32::SyscallTable32(), SyscallTable64::SyscallTable64(), and unameFunc32().

◆ linkFunc()

SyscallReturn linkFunc	(	SyscallDesc *	desc,
		ThreadContext *	tc,
		Addr	pathname,
		Addr	new_pathname
	)

Target link() handler.

Definition at line 465 of file syscall_emul.cc.

References ThreadContext::getProcessPtr(), ThreadContext::getVirtProxy(), and MipsISA::p.

◆ listenFunc()

SyscallReturn listenFunc	(	SyscallDesc *	desc,
		ThreadContext *	tc,
		int	tgt_fd,
		int	backlog
	)

Definition at line 1182 of file syscall_emul.cc.

References ThreadContext::getProcessPtr(), MipsISA::p, and ArmISA::status.

◆ lseekFunc()

SyscallReturn lseekFunc	(	SyscallDesc *	desc,
		ThreadContext *	tc,
		int	tgt_fd,
		uint64_t	offs,
		int	whence
	)

Target lseek() handler.

Definition at line 285 of file syscall_emul.cc.

References ThreadContext::getProcessPtr(), and MipsISA::p.

Referenced by SparcISA::getresuidFunc(), setThreadAreaFunc(), SyscallTable32::SyscallTable32(), SyscallTable64::SyscallTable64(), unameFunc(), and unameFunc32().

◆ mkdirFunc()

SyscallReturn mkdirFunc	(	SyscallDesc *	desc,
		ThreadContext *	tc,
		Addr	pathname,
		mode_t	mode
	)

Target mkdir() handler.

Definition at line 507 of file syscall_emul.cc.

References ThreadContext::getProcessPtr(), ThreadContext::getVirtProxy(), ArmISA::mode, MipsISA::p, and PortProxy::tryReadString().

Referenced by SparcISA::getresuidFunc(), setThreadAreaFunc(), SyscallTable32::SyscallTable32(), SyscallTable64::SyscallTable64(), and unameFunc32().

◆ mknodFunc()

SyscallReturn mknodFunc	(	SyscallDesc *	desc,
		ThreadContext *	tc,
		Addr	pathname,
		mode_t	mode,
		dev_t	dev
	)

Target mknod() handler.

Definition at line 1013 of file syscall_emul.cc.

References ThreadContext::getProcessPtr(), ThreadContext::getVirtProxy(), ArmISA::mode, MipsISA::p, and PortProxy::tryReadString().

◆ munmapFunc()

SyscallReturn munmapFunc	(	SyscallDesc *	desc,
		ThreadContext *	tc,
		Addr	start,
		size_t	length
	)

Target munmap() handler.

Definition at line 329 of file syscall_emul.cc.

References System::getPageBytes(), ThreadContext::getProcessPtr(), ThreadContext::getSystemPtr(), MipsISA::p, and roundUp().

Referenced by SparcISA::getresuidFunc(), setThreadAreaFunc(), SyscallTable32::SyscallTable32(), SyscallTable64::SyscallTable64(), unameFunc(), and unameFunc32().

◆ pipe2Func()

SyscallReturn pipe2Func	(	SyscallDesc *	desc,
		ThreadContext *	tc,
		Addr	tgt_addr,
		int	flags
	)

Target pipe() handler.

Now patch the read object to record the target file descriptor chosen as the write end of the pipe.

On some architectures, it's possible to use more than one register for a return value. In those cases, pipe returns its values rather than write them into a buffer.

Copy the target file descriptors into buffer space and then copy the buffer space back into the target address space.

Definition at line 800 of file syscall_emul.cc.

References BufferArg::bufferPtr(), BaseBufferArg::copyOut(), ThreadContext::getProcessPtr(), ThreadContext::getVirtProxy(), and MipsISA::p.

Referenced by pipeFunc(), and pipePseudoFunc().

◆ pipeFunc()

SyscallReturn pipeFunc	(	SyscallDesc *	desc,
		ThreadContext *	tc,
		Addr	tgt_addr
	)

Target pipe() handler.

Definition at line 794 of file syscall_emul.cc.

References pipe2Func().

Referenced by unameFunc32().

◆ pipePseudoFunc()

SyscallReturn pipePseudoFunc	(	SyscallDesc *	desc,
		ThreadContext *	tc
	)

Pseudo Funcs - These functions use a different return convension, returning a second value in a register other than the normal return register.

Definition at line 788 of file syscall_emul.cc.

References pipe2Func().

Referenced by futexFunc(), SparcISA::getresuidFunc(), setThreadAreaFunc(), SyscallTable32::SyscallTable32(), SyscallTable64::SyscallTable64(), and unameFunc().

◆ readlinkFunc()

SyscallReturn readlinkFunc	(	SyscallDesc *	desc,
		ThreadContext *	tc,
		Addr	pathname,
		Addr	buf_ptr,
		size_t	bufsiz
	)

Target readlink() handler.

Definition at line 392 of file syscall_emul.cc.

References BufferArg::bufferPtr(), BaseBufferArg::copyOut(), fatal, ThreadContext::getProcessPtr(), ThreadContext::getVirtProxy(), MipsISA::p, PortProxy::tryReadString(), and warn_once.

Referenced by SparcISA::getresuidFunc(), readlinkatFunc(), setThreadAreaFunc(), SyscallTable32::SyscallTable32(), SyscallTable64::SyscallTable64(), unameFunc(), and unameFunc32().

◆ recvfromFunc()

SyscallReturn recvfromFunc	(	SyscallDesc *	desc,
		ThreadContext *	tc,
		int	tgt_fd,
		Addr	bufrPtr,
		size_t	bufrLen,
		int	flags,
		Addr	addrPtr,
		Addr	addrlenPtr
	)

Definition at line 1218 of file syscall_emul.cc.

References BufferArg::bufferPtr(), BaseBufferArg::copyIn(), BaseBufferArg::copyOut(), ThreadContext::getProcessPtr(), ThreadContext::getVirtProxy(), MipsISA::p, and ArmISA::sa.

◆ recvmsgFunc()

SyscallReturn recvmsgFunc	(	SyscallDesc *	desc,
		ThreadContext *	tc,
		int	tgt_fd,
		Addr	msgPtr,
		int	flags
	)

struct msghdr { void *msg_name; // optional address socklen_t msg_namelen; // size of address struct iovec *msg_iov; // iovec array size_t msg_iovlen; // number entries in msg_iov i // entries correspond to buffer void *msg_control; // ancillary data size_t msg_controllen; // ancillary data buffer len int msg_flags; // flags on received message };

struct iovec { void *iov_base; // starting address size_t iov_len; // number of bytes to transfer };

The plan with this system call is to replace all of the pointers in the structure and the substructure with BufferArg class pointers. We will copy every field from the structures into our BufferArg classes.

We will use these address place holders to retain the pointers which we are going to replace with our own buffers in our simulator address space.

Record msg_name pointer then replace with buffer pointer.

Record msg_iov pointer then replace with buffer pointer. Also, setup an array of buffer pointers for the iovec structs record and replace their pointers with buffer pointers.

Record msg_control pointer then replace with buffer pointer.

Definition at line 1310 of file syscall_emul.cc.

References BufferArg::bufferPtr(), BaseBufferArg::copyIn(), BaseBufferArg::copyOut(), ThreadContext::getProcessPtr(), ThreadContext::getVirtProxy(), ArmISA::i, and MipsISA::p.

◆ renameFunc()

SyscallReturn renameFunc	(	SyscallDesc *	desc,
		ThreadContext *	tc,
		Addr	oldpath,
		Addr	newpath
	)

Target rename() handler.

Definition at line 521 of file syscall_emul.cc.

References ThreadContext::getProcessPtr(), ThreadContext::getVirtProxy(), MipsISA::p, and PortProxy::tryReadString().

Referenced by SparcISA::getresuidFunc(), renameatFunc(), SyscallTable32::SyscallTable32(), SyscallTable64::SyscallTable64(), unameFunc(), and unameFunc32().

◆ rmdirFunc()

SyscallReturn rmdirFunc	(	SyscallDesc *	desc,
		ThreadContext *	tc,
		Addr	pathname
	)

Definition at line 1055 of file syscall_emul.cc.

References PowerISA::bo, BufferArg::bufferPtr(), BaseBufferArg::copyOut(), X86ISA::count, System::getGuestByteOrder(), ThreadContext::getProcessPtr(), ThreadContext::getSystemPtr(), ThreadContext::getVirtProxy(), htog(), MipsISA::p, ArmISA::status, and PortProxy::tryReadString().

◆ sendmsgFunc()

SyscallReturn sendmsgFunc	(	SyscallDesc *	desc,
		ThreadContext *	tc,
		int	tgt_fd,
		Addr	msgPtr,
		int	flags
	)

Reserve buffer space.

Assuming msgHdr.msg_iovlen >= 1, then there is no point calling recvmsg without a buffer.

Cannot instantiate buffers till inside the loop. Create array to hold buffer addresses, to be used during copyIn of send data.

Iterate through the iovec structures: Get the base buffer addreses, reserve iov_len amount of space for each. Put the buf address into the bufferArray for later retrieval.

Free dynamically allocated memory.

Malloced above.

Definition at line 1448 of file syscall_emul.cc.

References BufferArg::bufferPtr(), BaseBufferArg::copyIn(), ThreadContext::getProcessPtr(), ThreadContext::getVirtProxy(), and MipsISA::p.

◆ sendtoFunc()

SyscallReturn sendtoFunc	(	SyscallDesc *	desc,
		ThreadContext *	tc,
		int	tgt_fd,
		Addr	bufrPtr,
		size_t	bufrLen,
		int	flags,
		Addr	addrPtr,
		socklen_t	addrLen
	)

Definition at line 1278 of file syscall_emul.cc.

References BufferArg::bufferPtr(), BaseBufferArg::copyIn(), ThreadContext::getProcessPtr(), ThreadContext::getVirtProxy(), MipsISA::p, and ArmISA::sa.

◆ setpgidFunc()

SyscallReturn setpgidFunc	(	SyscallDesc *	desc,
		ThreadContext *	tc,
		int	pid,
		int	pgid
	)

Target setpgid() handler.

Definition at line 892 of file syscall_emul.cc.

References ThreadContext::getProcessPtr(), ThreadContext::getSystemPtr(), ThreadContext::Halted, ArmISA::i, System::numContexts(), Process::pgid(), Process::pid(), and System::threadContexts.

Referenced by unameFunc32().

◆ setsockoptFunc()

SyscallReturn setsockoptFunc	(	SyscallDesc *	desc,
		ThreadContext *	tc,
		int	tgt_fd,
		int	level,
		int	optname,
		Addr	valPtr,
		socklen_t	len
	)

Definition at line 1617 of file syscall_emul.cc.

References BufferArg::bufferPtr(), BaseBufferArg::copyIn(), ThreadContext::getProcessPtr(), ThreadContext::getVirtProxy(), ArmISA::len, MipsISA::p, and ArmISA::status.

◆ setTidAddressFunc()

SyscallReturn setTidAddressFunc	(	SyscallDesc *	desc,
		ThreadContext *	tc,
		uint64_t	tidPtr
	)

Target set_tid_address() handler.

Definition at line 269 of file syscall_emul.cc.

References Process::childClearTID, and ThreadContext::getProcessPtr().

Referenced by SyscallTable32::SyscallTable32(), SyscallTable64::SyscallTable64(), and unameFunc32().

◆ shutdownFunc()

SyscallReturn shutdownFunc	(	SyscallDesc *	desc,
		ThreadContext *	tc,
		int	tgt_fd,
		int	how
	)

Target shutdown() handler.

Definition at line 1146 of file syscall_emul.cc.

References ThreadContext::getProcessPtr(), and MipsISA::p.

◆ symlinkFunc()

SyscallReturn symlinkFunc	(	SyscallDesc *	desc,
		ThreadContext *	tc,
		Addr	pathname,
		Addr	new_pathname
	)

Target symlink() handler.

Definition at line 486 of file syscall_emul.cc.

References ThreadContext::getProcessPtr(), ThreadContext::getVirtProxy(), and MipsISA::p.

◆ truncate64Func()

SyscallReturn truncate64Func	(	SyscallDesc *	desc,
		ThreadContext *	tc,
		Addr	pathname,
		int64_t	length
	)

Target truncate64() handler.

Definition at line 572 of file syscall_emul.cc.

References Process::checkPathRedirect(), ThreadContext::getProcessPtr(), ThreadContext::getVirtProxy(), length, and PortProxy::tryReadString().

Referenced by unameFunc32().

◆ truncateFunc()

SyscallReturn truncateFunc	(	SyscallDesc *	desc,
		ThreadContext *	tc,
		Addr	pathname,
		off_t	length
	)

Target truncate() handler.

Definition at line 542 of file syscall_emul.cc.

References ThreadContext::getProcessPtr(), ThreadContext::getVirtProxy(), length, MipsISA::p, and PortProxy::tryReadString().

Referenced by setThreadAreaFunc(), SyscallTable32::SyscallTable32(), SyscallTable64::SyscallTable64(), unameFunc(), and unameFunc32().

◆ umaskFunc()

SyscallReturn umaskFunc	(	SyscallDesc *	desc,
		ThreadContext *	tc
	)

Target umask() handler.

Definition at line 612 of file syscall_emul.cc.

Referenced by setThreadAreaFunc(), SyscallTable32::SyscallTable32(), unameFunc(), and unameFunc32().

◆ unimplementedFunc()

SyscallReturn unimplementedFunc	(	SyscallDesc *	desc,
		ThreadContext *	tc
	)

Handler for unimplemented syscalls that we haven't thought about.

Definition at line 65 of file syscall_emul.cc.

References fatal, SyscallDesc::name(), and SyscallDesc::num().

◆ unlinkFunc()

SyscallReturn unlinkFunc	(	SyscallDesc *	desc,
		ThreadContext *	tc,
		Addr	pathname
	)

Target unlink() handler.

Definition at line 450 of file syscall_emul.cc.

References ThreadContext::getProcessPtr(), ThreadContext::getVirtProxy(), MipsISA::p, and PortProxy::tryReadString().

Referenced by SparcISA::getresuidFunc(), setThreadAreaFunc(), SyscallTable32::SyscallTable32(), SyscallTable64::SyscallTable64(), unameFunc(), unameFunc32(), and unlinkatFunc().

◆ warnUnsupportedOS()

void warnUnsupportedOS ( std::string syscall_name )

Definition at line 59 of file syscall_emul.cc.

References warn.

Referenced by eventfdFunc(), fallocateFunc(), and statfsFunc().

Variable Documentation

◆ hostname

const char* hostname = "m5.eecs.umich.edu"

Definition at line 349 of file syscall_emul.cc.

Referenced by gethostnameFunc().

Functions

Variables

Function Documentation

◆ _llseekFunc()

◆ accessFunc()

◆ bindFunc()

◆ brkFunc()

◆ chdirFunc()

◆ chownFunc()

◆ closeFunc()

◆ connectFunc()

◆ dup2Func()

◆ dupFunc()

◆ exitFunc()

◆ exitFutexWake()

◆ exitGroupFunc()

◆ exitImpl()

◆ fallocateFunc()

◆ fchownFunc()

◆ fcntl64Func()

◆ fcntlFunc()

◆ ftruncate64Func()

◆ ftruncateFunc()

◆ getcwdFunc()

◆ getegidFunc()

◆ geteuidFunc()

◆ getgidFunc()

◆ gethostnameFunc()

◆ getpagesizeFunc()

◆ getpeernameFunc()

◆ getpgrpFunc()

◆ getpidFunc()

◆ getppidFunc()

◆ getsocknameFunc()

◆ getsockoptFunc()

◆ gettidFunc()

◆ getuidFunc()

◆ ignoreFunc()

◆ ignoreWarnOnceFunc()

◆ linkFunc()

◆ listenFunc()

◆ lseekFunc()

◆ mkdirFunc()

◆ mknodFunc()

◆ munmapFunc()

◆ pipe2Func()

◆ pipeFunc()

◆ pipePseudoFunc()

◆ readlinkFunc()

◆ recvfromFunc()

◆ recvmsgFunc()

◆ renameFunc()

◆ rmdirFunc()

◆ sendmsgFunc()

◆ sendtoFunc()

◆ setpgidFunc()

◆ setsockoptFunc()

◆ setTidAddressFunc()

◆ shutdownFunc()

◆ symlinkFunc()

◆ truncate64Func()

◆ truncateFunc()

◆ umaskFunc()

◆ unimplementedFunc()

◆ unlinkFunc()

◆ warnUnsupportedOS()

Variable Documentation

◆ hostname