#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, int callnum, ThreadContext tc)
	Handler for unimplemented syscalls that we haven't thought about. More...

SyscallReturn	ignoreFunc (SyscallDesc desc, int callnum, 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, int num, 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, int callnum, ThreadContext tc, bool group, int status)

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

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

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

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

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

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

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

SyscallReturn	_llseekFunc (SyscallDesc desc, int num, 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, int num, ThreadContext tc)
	Target munmap() handler. More...

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

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

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

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

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

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

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

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

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

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

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

SyscallReturn	ftruncate64Func (SyscallDesc desc, int num, ThreadContext tc)
	Target ftruncate64() handler. More...

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

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

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

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

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

SyscallReturn	fcntlFunc (SyscallDesc desc, int num, ThreadContext tc)
	Target fcntl() handler. More...

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

SyscallReturn	pipeImpl (SyscallDesc desc, int callnum, ThreadContext tc, bool pseudo_pipe, bool is_pipe2)
	Internal pipe() handler. More...

SyscallReturn	pipePseudoFunc (SyscallDesc desc, int callnum, 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, int callnum, ThreadContext tc)
	Target pipe() handler. More...

SyscallReturn	pipe2Func (SyscallDesc desc, int callnum, ThreadContext tc)
	Target pipe() handler. More...

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

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

SyscallReturn	getpidPseudoFunc (SyscallDesc desc, int callnum, ThreadContext tc)
	Target getpidPseudo() handler. More...

SyscallReturn	getuidPseudoFunc (SyscallDesc desc, int callnum, ThreadContext tc)
	Target getuidPseudo() handler. More...

SyscallReturn	getgidPseudoFunc (SyscallDesc desc, int callnum, ThreadContext tc)
	Target getgidPseudo() handler. More...

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

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

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

SyscallReturn	getuidFunc (SyscallDesc desc, int callnum, ThreadContext tc)

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

Target _llseek() handler.

Definition at line 335 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(), and unameFunc().

◆ accessFunc()

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

Target access() handler.

Definition at line 1088 of file syscall_emul.cc.

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

Referenced by faccessatFunc(), and unameFunc32().

◆ bindFunc()

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

Definition at line 1253 of file syscall_emul.cc.

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

◆ brkFunc()

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

Target brk() handler: set brk address.

Definition at line 253 of file syscall_emul.cc.

References ChunkGenerator::done(), DPRINTF_SYSCALL, ThreadContext::getProcessPtr(), ThreadContext::getVirtProxy(), PortProxy::memsetBlob(), MipsISA::p, AlphaISA::PageBytes, roundDown(), and roundUp().

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

◆ chdirFunc()

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

Target chdir() handler.

Definition at line 1119 of file syscall_emul.cc.

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

◆ chownFunc()

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

Target chown() handler.

Definition at line 651 of file syscall_emul.cc.

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

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

◆ closeFunc()

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

Target close() handler.

Definition at line 311 of file syscall_emul.cc.

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

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

◆ connectFunc()

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

Definition at line 1290 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,
		int	num,
		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 717 of file syscall_emul.cc.

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

Referenced by unameFunc32().

◆ dupFunc()

SyscallReturn dupFunc	(	SyscallDesc *	desc,
		int	num,
		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 697 of file syscall_emul.cc.

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

Referenced by osf_setsysinfoFunc(), unameFunc(), and unameFunc32().

◆ exitFunc()

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

Target exit() handler: terminate current context.

Definition at line 234 of file syscall_emul.cc.

References exitImpl().

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

◆ exitFutexWake()

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

static

Definition at line 99 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,
		int	callnum,
		ThreadContext *	tc,
		int	status
	)

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

Definition at line 240 of file syscall_emul.cc.

References exitImpl().

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

◆ exitImpl()

static SyscallReturn exitImpl	(	SyscallDesc *	desc,
		int	callnum,
		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 113 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,
		int	callnum,
		ThreadContext *	tc,
		int	tgt_fd,
		int	mode,
		off_t	offset,
		off_t	len
	)

Definition at line 1066 of file syscall_emul.cc.

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

Referenced by unameFunc32().

◆ fchownFunc()

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

Target fchown() handler.

Definition at line 672 of file syscall_emul.cc.

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

Referenced by osf_setsysinfoFunc(), setThreadAreaFunc(), and unameFunc32().

◆ fcntl64Func()

SyscallReturn fcntl64Func	(	SyscallDesc *	desc,
		int	num,
		ThreadContext *	tc
	)

Target fcntl64() handler.

Definition at line 791 of file syscall_emul.cc.

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

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

◆ fcntlFunc()

SyscallReturn fcntlFunc	(	SyscallDesc *	desc,
		int	num,
		ThreadContext *	tc
	)

Target fcntl() handler.

Definition at line 746 of file syscall_emul.cc.

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

Referenced by osf_setsysinfoFunc(), setThreadAreaFunc(), unameFunc(), and unameFunc32().

◆ ftruncate64Func()

SyscallReturn ftruncate64Func	(	SyscallDesc *	desc,
		int	num,
		ThreadContext *	tc
	)

Target ftruncate64() handler.

Definition at line 619 of file syscall_emul.cc.

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

Referenced by unameFunc(), and unameFunc32().

◆ ftruncateFunc()

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

Target ftruncate() handler.

Definition at line 583 of file syscall_emul.cc.

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

Referenced by osf_setsysinfoFunc(), setThreadAreaFunc(), unameFunc(), and unameFunc32().

◆ getcwdFunc()

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

Target getcwd() handler.

Definition at line 384 of file syscall_emul.cc.

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

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

◆ getegidFunc()

SyscallReturn getegidFunc	(	SyscallDesc *	desc,
		int	callnum,
		ThreadContext *	tc
	)

Target getegid() handler.

Definition at line 1059 of file syscall_emul.cc.

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

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

◆ geteuidFunc()

SyscallReturn geteuidFunc	(	SyscallDesc *	desc,
		int	callnum,
		ThreadContext *	tc
	)

Target geteuid() handler.

Definition at line 1045 of file syscall_emul.cc.

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

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

◆ getgidFunc()

SyscallReturn getgidFunc	(	SyscallDesc *	desc,
		int	callnum,
		ThreadContext *	tc
	)

Target getgid() handler.

Definition at line 1052 of file syscall_emul.cc.

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

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

◆ getgidPseudoFunc()

SyscallReturn getgidPseudoFunc	(	SyscallDesc *	desc,
		int	callnum,
		ThreadContext *	tc
	)

Target getgidPseudo() handler.

Definition at line 1007 of file syscall_emul.cc.

References ThreadContext::getProcessPtr(), ThreadContext::setIntReg(), and AlphaISA::SyscallPseudoReturnReg.

Referenced by futexFunc(), and osf_setsysinfoFunc().

◆ gethostnameFunc()

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

Target gethostname() handler.

Definition at line 374 of file syscall_emul.cc.

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

Referenced by osf_setsysinfoFunc(), setThreadAreaFunc(), and unameFunc().

◆ getpagesizeFunc()

SyscallReturn getpagesizeFunc	(	SyscallDesc *	desc,
		int	num,
		ThreadContext *	tc
	)

Target getpagesize() handler.

Definition at line 246 of file syscall_emul.cc.

References AlphaISA::PageBytes.

Referenced by osf_setsysinfoFunc(), setThreadAreaFunc(), and unameFunc().

◆ getpeernameFunc()

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

Definition at line 1683 of file syscall_emul.cc.

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

◆ getpgrpFunc()

SyscallReturn getpgrpFunc	(	SyscallDesc *	desc,
		int	callnum,
		ThreadContext *	tc
	)

Target getpgrpFunc() handler.

Definition at line 940 of file syscall_emul.cc.

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

◆ getpidFunc()

SyscallReturn getpidFunc	(	SyscallDesc *	desc,
		int	callnum,
		ThreadContext *	tc
	)

Target getpid() handler.

Definition at line 1017 of file syscall_emul.cc.

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

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

◆ getpidPseudoFunc()

SyscallReturn getpidPseudoFunc	(	SyscallDesc *	desc,
		int	callnum,
		ThreadContext *	tc
	)

Target getpidPseudo() handler.

Definition at line 981 of file syscall_emul.cc.

References ThreadContext::getProcessPtr(), ThreadContext::setIntReg(), and AlphaISA::SyscallPseudoReturnReg.

Referenced by futexFunc(), and osf_setsysinfoFunc().

◆ getppidFunc()

SyscallReturn getppidFunc	(	SyscallDesc *	desc,
		int	callnum,
		ThreadContext *	tc
	)

Target getppid() handler.

Definition at line 1031 of file syscall_emul.cc.

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

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

◆ getsocknameFunc()

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

Definition at line 1646 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,
		int	num,
		ThreadContext *	tc,
		int	tgt_fd,
		int	level,
		int	optname,
		Addr	valPtr,
		Addr	lenPtr
	)

Definition at line 1608 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,
		int	callnum,
		ThreadContext *	tc
	)

Target gettid() handler.

Definition at line 1024 of file syscall_emul.cc.

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

Referenced by unameFunc32().

◆ getuidFunc()

SyscallReturn getuidFunc	(	SyscallDesc *	desc,
		int	callnum,
		ThreadContext *	tc
	)

Definition at line 1038 of file syscall_emul.cc.

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

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

◆ getuidPseudoFunc()

SyscallReturn getuidPseudoFunc	(	SyscallDesc *	desc,
		int	callnum,
		ThreadContext *	tc
	)

Target getuidPseudo() handler.

Definition at line 994 of file syscall_emul.cc.

References ThreadContext::getProcessPtr(), ThreadContext::setIntReg(), and AlphaISA::SyscallPseudoReturnReg.

Referenced by futexFunc(), and osf_setsysinfoFunc().

◆ ignoreFunc()

SyscallReturn ignoreFunc	(	SyscallDesc *	desc,
		int	num,
		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 77 of file syscall_emul.cc.

References SyscallDesc::name(), and warn.

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

◆ ignoreWarnOnceFunc()

SyscallReturn ignoreWarnOnceFunc	(	SyscallDesc *	desc,
		int	num,
		ThreadContext *	tc
	)

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

Definition at line 84 of file syscall_emul.cc.

References SyscallDesc::name(), and warn.

Referenced by unameFunc32().

◆ linkFunc()

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

Target link() handler.

Definition at line 487 of file syscall_emul.cc.

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

◆ listenFunc()

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

Definition at line 1274 of file syscall_emul.cc.

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

◆ lseekFunc()

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

Target lseek() handler.

Definition at line 318 of file syscall_emul.cc.

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

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

◆ mkdirFunc()

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

Target mkdir() handler.

Definition at line 529 of file syscall_emul.cc.

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

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

◆ mknodFunc()

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

Target mknod() handler.

Definition at line 1104 of file syscall_emul.cc.

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

◆ munmapFunc()

SyscallReturn munmapFunc	(	SyscallDesc *	desc,
		int	num,
		ThreadContext *	tc
	)

Target munmap() handler.

Definition at line 362 of file syscall_emul.cc.

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

◆ pipe2Func()

SyscallReturn pipe2Func	(	SyscallDesc *	desc,
		int	callnum,
		ThreadContext *	tc
	)

Target pipe() handler.

Definition at line 932 of file syscall_emul.cc.

References pipeImpl().

◆ pipeFunc()

SyscallReturn pipeFunc	(	SyscallDesc *	desc,
		int	callnum,
		ThreadContext *	tc
	)

Target pipe() handler.

Definition at line 926 of file syscall_emul.cc.

References pipeImpl().

Referenced by unameFunc32().

◆ pipeImpl()

SyscallReturn pipeImpl	(	SyscallDesc *	desc,
		int	callnum,
		ThreadContext *	tc,
		bool	pseudo_pipe,
		bool	is_pipe2
	)

Internal pipe() handler.

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

Alpha Linux convention for pipe() is that fd[0] is returned as the return value of the function, and fd[1] is returned in r20.

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

Definition at line 823 of file syscall_emul.cc.

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

Referenced by pipe2Func(), pipeFunc(), and pipePseudoFunc().

◆ pipePseudoFunc()

SyscallReturn pipePseudoFunc	(	SyscallDesc *	desc,
		int	callnum,
		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 920 of file syscall_emul.cc.

References pipeImpl().

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

◆ readlinkFunc()

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

Target readlink() handler.

Definition at line 414 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(), osf_setsysinfoFunc(), readlinkatFunc(), setThreadAreaFunc(), unameFunc(), and unameFunc32().

◆ recvfromFunc()

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

Definition at line 1311 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,
		int	num,
		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 1403 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,
		int	num,
		ThreadContext *	tc,
		Addr	oldpath,
		Addr	newpath
	)

Target rename() handler.

Definition at line 544 of file syscall_emul.cc.

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

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

◆ rmdirFunc()

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

Definition at line 1146 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,
		int	num,
		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 1541 of file syscall_emul.cc.

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

◆ sendtoFunc()

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

Definition at line 1371 of file syscall_emul.cc.

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

◆ setpgidFunc()

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

Target setpgid() handler.

Definition at line 947 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,
		int	num,
		ThreadContext *	tc,
		int	tgt_fd,
		int	level,
		int	optname,
		Addr	valPtr,
		socklen_t	len
	)

Definition at line 1710 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,
		int	callnum,
		ThreadContext *	tc,
		uint64_t	tidPtr
	)

Target set_tid_address() handler.

Definition at line 301 of file syscall_emul.cc.

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

Referenced by unameFunc32().

◆ shutdownFunc()

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

Target shutdown() handler.

Definition at line 1237 of file syscall_emul.cc.

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

◆ symlinkFunc()

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

Target symlink() handler.

Definition at line 508 of file syscall_emul.cc.

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

◆ truncate64Func()

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

Target truncate64() handler.

Definition at line 598 of file syscall_emul.cc.

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

Referenced by unameFunc32().

◆ truncateFunc()

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

Target truncate() handler.

Definition at line 566 of file syscall_emul.cc.

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

Referenced by osf_setsysinfoFunc(), setThreadAreaFunc(), unameFunc(), and unameFunc32().

◆ umaskFunc()

SyscallReturn umaskFunc	(	SyscallDesc *	desc,
		int	num,
		ThreadContext *	tc
	)

Target umask() handler.

Definition at line 640 of file syscall_emul.cc.

Referenced by osf_setsysinfoFunc(), setThreadAreaFunc(), unameFunc(), and unameFunc32().

◆ unimplementedFunc()

SyscallReturn unimplementedFunc	(	SyscallDesc *	desc,
		int	callnum,
		ThreadContext *	tc
	)

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

Definition at line 68 of file syscall_emul.cc.

References fatal, and SyscallDesc::name().

◆ unlinkFunc()

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

Target unlink() handler.

Definition at line 472 of file syscall_emul.cc.

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

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

◆ warnUnsupportedOS()

void warnUnsupportedOS ( std::string syscall_name )

Definition at line 62 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 371 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()

◆ getgidPseudoFunc()

◆ gethostnameFunc()

◆ getpagesizeFunc()

◆ getpeernameFunc()

◆ getpgrpFunc()

◆ getpidFunc()

◆ getpidPseudoFunc()

◆ getppidFunc()

◆ getsocknameFunc()

◆ getsockoptFunc()

◆ gettidFunc()

◆ getuidFunc()

◆ getuidPseudoFunc()

◆ ignoreFunc()

◆ ignoreWarnOnceFunc()

◆ linkFunc()

◆ listenFunc()

◆ lseekFunc()

◆ mkdirFunc()

◆ mknodFunc()

◆ munmapFunc()

◆ pipe2Func()

◆ pipeFunc()

◆ pipeImpl()

◆ pipePseudoFunc()

◆ readlinkFunc()

◆ recvfromFunc()

◆ recvmsgFunc()

◆ renameFunc()

◆ rmdirFunc()

◆ sendmsgFunc()

◆ sendtoFunc()

◆ setpgidFunc()

◆ setsockoptFunc()

◆ setTidAddressFunc()

◆ shutdownFunc()

◆ symlinkFunc()

◆ truncate64Func()

◆ truncateFunc()

◆ umaskFunc()

◆ unimplementedFunc()

◆ unlinkFunc()

◆ warnUnsupportedOS()

Variable Documentation

◆ hostname