This file defines objects used to emulate syscalls from the target application on the host machine. More...

#include <sys/mount.h>
#include <fcntl.h>
#include <net/if.h>
#include <poll.h>
#include <sys/ioctl.h>
#include <sys/mman.h>
#include <sys/socket.h>
#include <sys/stat.h>
#include <sys/time.h>
#include <sys/types.h>
#include <sys/uio.h>
#include <unistd.h>
#include <cerrno>
#include <memory>
#include <string>
#include "arch/generic/tlb.hh"
#include "arch/utility.hh"
#include "base/intmath.hh"
#include "base/loader/object_file.hh"
#include "base/logging.hh"
#include "base/trace.hh"
#include "base/types.hh"
#include "config/the_isa.hh"
#include "cpu/base.hh"
#include "cpu/thread_context.hh"
#include "mem/page_table.hh"
#include "params/Process.hh"
#include "sim/emul_driver.hh"
#include "sim/futex_map.hh"
#include "sim/guest_abi.hh"
#include "sim/process.hh"
#include "sim/syscall_debug_macros.hh"
#include "sim/syscall_desc.hh"
#include "sim/syscall_emul_buf.hh"
#include "sim/syscall_return.hh"

Macros
#define	NO_STAT64 0

Typedefs
typedef struct statfs	hst_statfs

typedef struct stat	hst_stat

typedef struct stat64	hst_stat64

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...

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

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	setTidAddressFunc (SyscallDesc desc, ThreadContext tc, uint64_t tidPtr)
	Target set_tid_address() handler. 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	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	shutdownFunc (SyscallDesc desc, ThreadContext tc, int tgt_fd, int how)
	Target shutdown() 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, 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	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	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	gettidFunc (SyscallDesc desc, ThreadContext tc)
	Target gettid() handler. More...

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

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

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

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

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	getuidFunc (SyscallDesc desc, ThreadContext tc)

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

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

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

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

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

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

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

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

template<class OS >
SyscallReturn	futexFunc (SyscallDesc desc, ThreadContext tc, Addr uaddr, int op, int val, int timeout, Addr uaddr2, int val3)
	Futex system call Implemented by Daniel Sanchez Used by printf's in multi-threaded apps. 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...

template<class T1 , class T2 >
void	getElapsedTimeMicro (T1 &sec, T2 &usec)
	Helper function to convert current elapsed time to seconds and microseconds. More...

template<class T1 , class T2 >
void	getElapsedTimeNano (T1 &sec, T2 &nsec)
	Helper function to convert current elapsed time to seconds and nanoseconds. More...

template<typename target_stat , typename host_stat >
void	convertStatBuf (target_stat &tgt, host_stat *host, ByteOrder bo, bool fakeTTY=false)

template<typename target_stat , typename host_stat64 >
void	convertStat64Buf (target_stat &tgt, host_stat64 *host, ByteOrder bo, bool fakeTTY=false)

template<class OS >
void	copyOutStatBuf (PortProxy &mem, Addr addr, hst_stat *host, bool fakeTTY=false)

template<class OS >
void	copyOutStat64Buf (PortProxy &mem, Addr addr, hst_stat64 *host, bool fakeTTY=false)

template<class OS >
void	copyOutStatfsBuf (PortProxy &mem, Addr addr, hst_statfs *host)

template<class OS >
SyscallReturn	ioctlFunc (SyscallDesc desc, ThreadContext tc, int tgt_fd, unsigned req, Addr addr)
	Target ioctl() handler. More...

template<class OS >
SyscallReturn	openatFunc (SyscallDesc desc, ThreadContext tc, int tgt_dirfd, Addr pathname, int tgt_flags, int mode)
	Target open() handler. More...

template<class OS >
SyscallReturn	openFunc (SyscallDesc desc, ThreadContext tc, Addr pathname, int tgt_flags, int mode)
	Target open() handler. More...

template<class OS >
SyscallReturn	unlinkatFunc (SyscallDesc desc, ThreadContext tc, int dirfd, Addr pathname)
	Target unlinkat() handler. More...

template<class OS >
SyscallReturn	faccessatFunc (SyscallDesc desc, ThreadContext tc, int dirfd, Addr pathname, int mode)
	Target facessat() handler. More...

template<class OS >
SyscallReturn	readlinkatFunc (SyscallDesc desc, ThreadContext tc, int dirfd, Addr pathname, Addr buf, size_t bufsiz)
	Target readlinkat() handler. More...

template<class OS >
SyscallReturn	renameatFunc (SyscallDesc desc, ThreadContext tc, int olddirfd, Addr oldpath, int newdirfd, Addr newpath)
	Target renameat() handler. More...

template<class OS >
SyscallReturn	sysinfoFunc (SyscallDesc desc, ThreadContext tc, Addr info)
	Target sysinfo() handler. More...

template<class OS >
SyscallReturn	chmodFunc (SyscallDesc desc, ThreadContext tc, Addr pathname, mode_t mode)
	Target chmod() handler. More...

template<class OS >
SyscallReturn	pollFunc (SyscallDesc desc, ThreadContext tc, Addr fdsPtr, int nfds, int tmout)

template<class OS >
SyscallReturn	fchmodFunc (SyscallDesc desc, ThreadContext tc, int tgt_fd, uint32_t mode)
	Target fchmod() handler. More...

template<class OS >
SyscallReturn	mremapFunc (SyscallDesc desc, ThreadContext tc, Addr start, uint64_t old_length, uint64_t new_length, uint64_t flags, GuestABI::VarArgs< uint64_t > varargs)
	Target mremap() handler. More...

template<class OS >
SyscallReturn	statFunc (SyscallDesc desc, ThreadContext tc, Addr pathname, Addr bufPtr)
	Target stat() handler. More...

template<class OS >
SyscallReturn	stat64Func (SyscallDesc desc, ThreadContext tc, Addr pathname, Addr bufPtr)
	Target stat64() handler. More...

template<class OS >
SyscallReturn	fstatat64Func (SyscallDesc desc, ThreadContext tc, int dirfd, Addr pathname, Addr bufPtr)
	Target fstatat64() handler. More...

template<class OS >
SyscallReturn	fstat64Func (SyscallDesc desc, ThreadContext tc, int tgt_fd, Addr bufPtr)
	Target fstat64() handler. More...

template<class OS >
SyscallReturn	lstatFunc (SyscallDesc desc, ThreadContext tc, Addr pathname, Addr bufPtr)
	Target lstat() handler. More...

template<class OS >
SyscallReturn	lstat64Func (SyscallDesc desc, ThreadContext tc, Addr pathname, Addr bufPtr)
	Target lstat64() handler. More...

template<class OS >
SyscallReturn	fstatFunc (SyscallDesc desc, ThreadContext tc, int tgt_fd, Addr bufPtr)
	Target fstat() handler. More...

template<class OS >
SyscallReturn	statfsFunc (SyscallDesc desc, ThreadContext tc, Addr pathname, Addr bufPtr)
	Target statfs() handler. More...

template<class OS >
SyscallReturn	cloneFunc (SyscallDesc desc, ThreadContext tc, RegVal flags, RegVal newStack, Addr ptidPtr, Addr ctidPtr, Addr tlsPtr)

template<class OS >
SyscallReturn	cloneBackwardsFunc (SyscallDesc desc, ThreadContext tc, RegVal flags, RegVal newStack, Addr ptidPtr, Addr tlsPtr, Addr ctidPtr)

template<class OS >
SyscallReturn	fstatfsFunc (SyscallDesc desc, ThreadContext tc, int tgt_fd, Addr bufPtr)
	Target fstatfs() handler. More...

template<class OS >
SyscallReturn	readvFunc (SyscallDesc desc, ThreadContext tc, int tgt_fd, uint64_t tiov_base, size_t count)
	Target readv() handler. More...

template<class OS >
SyscallReturn	writevFunc (SyscallDesc desc, ThreadContext tc, int tgt_fd, uint64_t tiov_base, size_t count)
	Target writev() handler. More...

template<class OS >
SyscallReturn	mmapFunc (SyscallDesc desc, ThreadContext tc, Addr start, typename OS::size_t length, int prot, int tgt_flags, int tgt_fd, typename OS::off_t offset)
	Target mmap() handler. More...

template<class OS >
SyscallReturn	pread64Func (SyscallDesc desc, ThreadContext tc, int tgt_fd, Addr bufPtr, int nbytes, int offset)

template<class OS >
SyscallReturn	pwrite64Func (SyscallDesc desc, ThreadContext tc, int tgt_fd, Addr bufPtr, int nbytes, int offset)

template<class OS >
SyscallReturn	mmap2Func (SyscallDesc desc, ThreadContext tc, Addr start, typename OS::size_t length, int prot, int tgt_flags, int tgt_fd, typename OS::off_t offset)
	Target mmap2() handler. More...

template<class OS >
SyscallReturn	getrlimitFunc (SyscallDesc desc, ThreadContext tc, unsigned resource, Addr rlim)
	Target getrlimit() handler. More...

template<class OS >
SyscallReturn	prlimitFunc (SyscallDesc desc, ThreadContext tc, int pid, int resource, Addr n, Addr o)

template<class OS >
SyscallReturn	clock_gettimeFunc (SyscallDesc desc, ThreadContext tc, int clk_id, Addr tp_ptr)
	Target clock_gettime() function. More...

template<class OS >
SyscallReturn	clock_getresFunc (SyscallDesc desc, ThreadContext tc, int clk_id, Addr tp_ptr)
	Target clock_getres() function. More...

template<class OS >
SyscallReturn	gettimeofdayFunc (SyscallDesc desc, ThreadContext tc, Addr tv_ptr, Addr tz_ptr)
	Target gettimeofday() handler. More...

template<class OS >
SyscallReturn	utimesFunc (SyscallDesc desc, ThreadContext tc, Addr pathname, Addr times)
	Target utimes() handler. More...

template<class OS >
SyscallReturn	execveFunc (SyscallDesc desc, ThreadContext tc, Addr pathname, Addr argv_mem_loc, Addr envp_mem_loc)

template<class OS >
SyscallReturn	getrusageFunc (SyscallDesc desc, ThreadContext tc, int who, Addr usage)
	Target getrusage() function. More...

template<class OS >
SyscallReturn	timesFunc (SyscallDesc desc, ThreadContext tc, Addr bufPtr)
	Target times() function. More...

template<class OS >
SyscallReturn	timeFunc (SyscallDesc desc, ThreadContext tc, Addr taddr)
	Target time() function. More...

template<class OS >
SyscallReturn	tgkillFunc (SyscallDesc desc, ThreadContext tc, int tgid, int tid, int sig)

template<class OS >
SyscallReturn	socketFunc (SyscallDesc desc, ThreadContext tc, int domain, int type, int prot)

template<class OS >
SyscallReturn	socketpairFunc (SyscallDesc desc, ThreadContext tc, int domain, int type, int prot, Addr svPtr)

template<class OS >
SyscallReturn	selectFunc (SyscallDesc desc, ThreadContext tc, int nfds_t, Addr fds_read_ptr, Addr fds_writ_ptr, Addr fds_excp_ptr, Addr time_val_ptr)

template<class OS >
SyscallReturn	readFunc (SyscallDesc desc, ThreadContext tc, int tgt_fd, Addr buf_ptr, int nbytes)

template<class OS >
SyscallReturn	writeFunc (SyscallDesc desc, ThreadContext tc, int tgt_fd, Addr buf_ptr, int nbytes)

template<class OS >
SyscallReturn	wait4Func (SyscallDesc desc, ThreadContext tc, pid_t pid, Addr statPtr, int options, Addr rusagePtr)

template<class OS >
SyscallReturn	acceptFunc (SyscallDesc desc, ThreadContext tc, int tgt_fd, Addr addrPtr, Addr lenPtr)

template<class OS >
SyscallReturn	eventfdFunc (SyscallDesc desc, ThreadContext tc, unsigned initval, int in_flags)
	Target eventfd() function. More...

Variables
const unsigned	seconds_since_epoch = 1000 * 1000 * 1000
	Approximate seconds since the epoch (1/1/1970). More...

Detailed Description

This file defines objects used to emulate syscalls from the target application on the host machine.

Definition in file syscall_emul.hh.

Macro Definition Documentation

◆ NO_STAT64

#define NO_STAT64 0

Definition at line 50 of file syscall_emul.hh.

Typedef Documentation

◆ hst_stat

typedef struct stat hst_stat

Definition at line 545 of file syscall_emul.hh.

◆ hst_stat64

typedef struct stat64 hst_stat64

Definition at line 546 of file syscall_emul.hh.

◆ hst_statfs

typedef struct statfs hst_statfs

Definition at line 540 of file syscall_emul.hh.

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().

◆ acceptFunc()

template<class OS >

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

We poll the socket file descriptor first to guarantee that we do not block on our accept call. The socket can be opened without the non-blocking flag (it blocks). This will cause deadlocks between communicating processes.

Definition at line 2579 of file syscall_emul.hh.

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

◆ 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().

◆ chmodFunc()

template<class OS >

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

Target chmod() handler.

Definition at line 995 of file syscall_emul.hh.

References ThreadContext::getProcessPtr(), ThreadContext::getVirtProxy(), ArmISA::mode, 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().

◆ clock_getresFunc()

template<class OS >

SyscallReturn clock_getresFunc	(	SyscallDesc *	desc,
		ThreadContext *	tc,
		int	clk_id,
		Addr	tp_ptr
	)

Target clock_getres() function.

Definition at line 1933 of file syscall_emul.hh.

References BaseBufferArg::copyOut(), and ThreadContext::getVirtProxy().

◆ clock_gettimeFunc()

template<class OS >

SyscallReturn clock_gettimeFunc	(	SyscallDesc *	desc,
		ThreadContext *	tc,
		int	clk_id,
		Addr	tp_ptr
	)

Target clock_gettime() function.

Definition at line 1915 of file syscall_emul.hh.

References ArmISA::byteOrder(), BaseBufferArg::copyOut(), getElapsedTimeNano(), ThreadContext::getVirtProxy(), htog(), and seconds_since_epoch.

◆ cloneBackwardsFunc()

template<class OS >

SyscallReturn cloneBackwardsFunc	(	SyscallDesc *	desc,
		ThreadContext *	tc,
		RegVal	flags,
		RegVal	newStack,
		Addr	ptidPtr,
		Addr	tlsPtr,
		Addr	ctidPtr
	)

Definition at line 1540 of file syscall_emul.hh.

◆ cloneFunc()

template<class OS >

SyscallReturn cloneFunc	(	SyscallDesc *	desc,
		ThreadContext *	tc,
		RegVal	flags,
		RegVal	newStack,
		Addr	ptidPtr,
		Addr	ctidPtr,
		Addr	tlsPtr
	)

Note that ProcessParams is generated by swig and there are no other examples of how to create anything but this default constructor. The fields are manually initialized instead of passing parameters to the constructor.

Definition at line 1425 of file syscall_emul.hh.

References ThreadContext::activate(), Process::assignThreadContext(), BufferArg::bufferPtr(), Process::childClearTID, ThreadContext::clearArchRegs(), ThreadContext::contextId(), BaseBufferArg::copyOut(), ThreadContext::cpuId(), DPRINTF_SYSCALL, fatal, System::findFreeContext(), ThreadContext::getProcessPtr(), ThreadContext::getSystemPtr(), ThreadContext::getVirtProxy(), Process::initState(), System::maxPID, MipsISA::p, ThreadContext::pcState(), Process::pid(), Process::pTable, SyscallDesc::returnInto(), Process::revokeThreadContext(), ThreadContext::setIntReg(), ThreadContext::setProcessPtr(), EmulationPageTable::shared, Process::sigchld, ArmISA::SyscallPseudoReturnReg, ThreadContext::threadId(), and Process::useForClone.

◆ 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.

◆ convertStat64Buf()

template<typename target_stat , typename host_stat64 >

void convertStat64Buf	(	target_stat &	tgt,
		host_stat64 *	host,
		ByteOrder	bo,
		bool	fakeTTY = `false`
	)

Definition at line 603 of file syscall_emul.hh.

References PowerISA::bo, and htog().

◆ convertStatBuf()

template<typename target_stat , typename host_stat >

void convertStatBuf	(	target_stat &	tgt,
		host_stat *	host,
		ByteOrder	bo,
		bool	fakeTTY = `false`
	)

Definition at line 555 of file syscall_emul.hh.

References htog().

◆ copyOutStat64Buf()

template<class OS >

void copyOutStat64Buf	(	PortProxy &	mem,
		Addr	addr,
		hst_stat64 *	host,
		bool	fakeTTY = `false`
	)

Definition at line 635 of file syscall_emul.hh.

References ArmISA::byteOrder().

◆ copyOutStatBuf()

template<class OS >

void copyOutStatBuf	(	PortProxy &	mem,
		Addr	addr,
		hst_stat *	host,
		bool	fakeTTY = `false`
	)

Definition at line 624 of file syscall_emul.hh.

References ArmISA::byteOrder().

◆ copyOutStatfsBuf()

template<class OS >

void copyOutStatfsBuf	(	PortProxy &	mem,
		Addr	addr,
		hst_statfs *	host
	)

Definition at line 647 of file syscall_emul.hh.

References PowerISA::bo, ArmISA::byteOrder(), BaseBufferArg::copyOut(), and htog().

◆ 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
	)

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().

◆ eventfdFunc()

template<class OS >

SyscallReturn eventfdFunc	(	SyscallDesc *	desc,
		ThreadContext *	tc,
		unsigned	initval,
		int	in_flags
	)

Target eventfd() function.

Definition at line 2646 of file syscall_emul.hh.

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

◆ execveFunc()

template<class OS >

SyscallReturn execveFunc	(	SyscallDesc *	desc,
		ThreadContext *	tc,
		Addr	pathname,
		Addr	argv_mem_loc,
		Addr	envp_mem_loc
	)

Note that ProcessParams is generated by swig and there are no other examples of how to create anything but this default constructor. The fields are manually initialized instead of passing parameters to the constructor.

Prevent process object creation with identical PIDs (which will trip a fatal check in Process constructor). The execve call is supposed to take over the currently executing process' identity but replace whatever it is doing with a new process image. Instead of hijacking the process object in the simulator, we create a new process object and bind to the previous process' thread below (hijacking the thread).

Work through the file descriptor array and close any files marked close-on-exec.

Definition at line 1998 of file syscall_emul.hh.

References ThreadContext::activate(), Process::assignThreadContext(), ArmISA::b, BufferArg::bufferPtr(), ThreadContext::clearArchRegs(), ThreadContext::contextId(), BaseBufferArg::copyIn(), Process::fds, ThreadContext::getProcessPtr(), ThreadContext::getVirtProxy(), ArmISA::i, sc_dt::inc(), Process::initState(), MipsISA::p, ThreadContext::pcState(), ThreadContext::setNPC(), ThreadContext::setProcessPtr(), Process::sigchld, and PortProxy::tryReadString().

◆ 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().

◆ 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().

◆ faccessatFunc()

template<class OS >

SyscallReturn faccessatFunc	(	SyscallDesc *	desc,
		ThreadContext *	tc,
		int	dirfd,
		Addr	pathname,
		int	mode
	)

Target facessat() handler.

Definition at line 940 of file syscall_emul.hh.

References accessFunc(), and warn.

◆ 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().

◆ fchmodFunc()

template<class OS >

SyscallReturn fchmodFunc	(	SyscallDesc *	desc,
		ThreadContext *	tc,
		int	tgt_fd,
		uint32_t	mode
	)

Target fchmod() handler.

Definition at line 1095 of file syscall_emul.hh.

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

◆ 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().

◆ fstat64Func()

template<class OS >

SyscallReturn fstat64Func	(	SyscallDesc *	desc,
		ThreadContext *	tc,
		int	tgt_fd,
		Addr	bufPtr
	)

Target fstat64() handler.

Definition at line 1288 of file syscall_emul.hh.

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

◆ fstatat64Func()

template<class OS >

SyscallReturn fstatat64Func	(	SyscallDesc *	desc,
		ThreadContext *	tc,
		int	dirfd,
		Addr	pathname,
		Addr	bufPtr
	)

Target fstatat64() handler.

Definition at line 1254 of file syscall_emul.hh.

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

◆ fstatfsFunc()

template<class OS >

SyscallReturn fstatfsFunc	(	SyscallDesc *	desc,
		ThreadContext *	tc,
		int	tgt_fd,
		Addr	bufPtr
	)

Target fstatfs() handler.

Definition at line 1549 of file syscall_emul.hh.

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

◆ fstatFunc()

template<class OS >

SyscallReturn fstatFunc	(	SyscallDesc *	desc,
		ThreadContext *	tc,
		int	tgt_fd,
		Addr	bufPtr
	)

Target fstat() handler.

Definition at line 1372 of file syscall_emul.hh.

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

◆ 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().

◆ futexFunc()

template<class OS >

SyscallReturn futexFunc	(	SyscallDesc *	desc,
		ThreadContext *	tc,
		Addr	uaddr,
		int	op,
		int	val,
		int	timeout,
		Addr	uaddr2,
		int	val3
	)

Futex system call Implemented by Daniel Sanchez Used by printf's in multi-threaded apps.

Definition at line 366 of file syscall_emul.hh.

References BufferArg::bufferPtr(), BaseBufferArg::copyIn(), BaseBufferArg::copyOut(), System::futexMap, ThreadContext::getProcessPtr(), ThreadContext::getSystemPtr(), ThreadContext::getVirtProxy(), pipePseudoFunc(), FutexMap::requeue(), FutexMap::suspend(), FutexMap::suspend_bitset(), X86ISA::val, FutexMap::wakeup(), FutexMap::wakeup_bitset(), and warn.

◆ 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().

◆ getElapsedTimeMicro()

template<class T1 , class T2 >

void getElapsedTimeMicro	(	T1 &	sec,
		T2 &	usec
	)

Helper function to convert current elapsed time to seconds and microseconds.

Definition at line 511 of file syscall_emul.hh.

References curTick(), and SimClock::Int::us.

Referenced by getrusageFunc(), gettimeofdayFunc(), and timeFunc().

◆ getElapsedTimeNano()

template<class T1 , class T2 >

void getElapsedTimeNano	(	T1 &	sec,
		T2 &	nsec
	)

Helper function to convert current elapsed time to seconds and nanoseconds.

Definition at line 524 of file syscall_emul.hh.

References curTick(), and SimClock::Int::ns.

Referenced by clock_gettimeFunc().

◆ 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().

◆ getrlimitFunc()

template<class OS >

SyscallReturn getrlimitFunc	(	SyscallDesc *	desc,
		ThreadContext *	tc,
		unsigned	resource,
		Addr	rlim
	)

Target getrlimit() handler.

Definition at line 1838 of file syscall_emul.hh.

References PowerISA::bo, ArmISA::byteOrder(), BaseBufferArg::copyOut(), ThreadContext::getSystemPtr(), ThreadContext::getVirtProxy(), htog(), System::numContexts(), and warn.

◆ getrusageFunc()

template<class OS >

SyscallReturn getrusageFunc	(	SyscallDesc *	desc,
		ThreadContext *	tc,
		int	who,
		Addr	usage
	)

Target getrusage() function.

Definition at line 2087 of file syscall_emul.hh.

References ArmISA::byteOrder(), BaseBufferArg::copyOut(), getElapsedTimeMicro(), ThreadContext::getVirtProxy(), htog(), and warn.

◆ 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().

◆ gettimeofdayFunc()

template<class OS >

SyscallReturn gettimeofdayFunc	(	SyscallDesc *	desc,
		ThreadContext *	tc,
		Addr	tv_ptr,
		Addr	tz_ptr
	)

Target gettimeofday() handler.

Definition at line 1949 of file syscall_emul.hh.

References ArmISA::byteOrder(), BaseBufferArg::copyOut(), getElapsedTimeMicro(), ThreadContext::getVirtProxy(), htog(), and seconds_since_epoch.

◆ 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().

◆ ioctlFunc()

template<class OS >

SyscallReturn ioctlFunc	(	SyscallDesc *	desc,
		ThreadContext *	tc,
		int	tgt_fd,
		unsigned	req,
		Addr	addr
	)

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.

For lack of a better return code, return ENOTTY. Ideally, we should return something better here, but at least we issue the warning.

Definition at line 695 of file syscall_emul.hh.

References BufferArg::bufferPtr(), BaseBufferArg::copyIn(), BaseBufferArg::copyOut(), DPRINTF_SYSCALL, ThreadContext::getProcessPtr(), ThreadContext::getVirtProxy(), EmulatedDriver::ioctl(), MipsISA::p, ThreadContext::pcState(), ArmISA::status, and warn.

◆ 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().

◆ lstat64Func()

template<class OS >

SyscallReturn lstat64Func	(	SyscallDesc *	desc,
		ThreadContext *	tc,
		Addr	pathname,
		Addr	bufPtr
	)

Target lstat64() handler.

Definition at line 1342 of file syscall_emul.hh.

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

◆ lstatFunc()

template<class OS >

SyscallReturn lstatFunc	(	SyscallDesc *	desc,
		ThreadContext *	tc,
		Addr	pathname,
		Addr	bufPtr
	)

Target lstat() handler.

Definition at line 1317 of file syscall_emul.hh.

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

◆ 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().

◆ mmap2Func()

template<class OS >

SyscallReturn mmap2Func	(	SyscallDesc *	desc,
		ThreadContext *	tc,
		Addr	start,
		typename OS::size_t	length,
		int	prot,
		int	tgt_flags,
		int	tgt_fd,
		typename OS::off_t	offset
	)

Target mmap2() handler.

Definition at line 1827 of file syscall_emul.hh.

References length, and X86ISA::prot.

◆ mmapFunc()

template<class OS >

SyscallReturn mmapFunc	(	SyscallDesc *	desc,
		ThreadContext *	tc,
		Addr	start,
		typename OS::size_t	length,
		int	prot,
		int	tgt_flags,
		int	tgt_fd,
		typename OS::off_t	offset
	)

Target mmap() handler.

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.

Not TGT_MAP_FIXED means we can start wherever we want.

If the application provides us with a hint, we should make some small amount of effort to accomodate it. Basically, we check if every single VA within the requested range is unused. If it is, we give the application the range. If not, we fall back to extending the global mmap region.

Extend global mmap region to give us some room for the app.

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.

We might already have some old VMAs mapped to this region, so make sure to clear em out!

Figure out a human-readable name for the mapping.

Setup the correct VMA for this region. The physical pages will be mapped lazily.

Definition at line 1643 of file syscall_emul.hh.

References Loader::createObjectFile(), Loader::debugSymbolTable, DPRINTF_SYSCALL, FileFDEntry::getFileName(), System::getPageBytes(), ThreadContext::getProcessPtr(), HBFDEntry::getSimFD(), ThreadContext::getSystemPtr(), EmulatedDriver::mmap(), MipsISA::p, ThreadContext::pcState(), roundUp(), and warn_once.

◆ mremapFunc()

template<class OS >

SyscallReturn mremapFunc	(	SyscallDesc *	desc,
		ThreadContext *	tc,
		Addr	start,
		uint64_t	old_length,
		uint64_t	new_length,
		uint64_t	flags,
		GuestABI::VarArgs< uint64_t >	varargs
	)

Target mremap() handler.

Definition at line 1114 of file syscall_emul.hh.

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

◆ 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().

◆ openatFunc()

template<class OS >

SyscallReturn openatFunc	(	SyscallDesc *	desc,
		ThreadContext *	tc,
		int	tgt_dirfd,
		Addr	pathname,
		int	tgt_flags,
		int	mode
	)

Target open() handler.

Retrieve the simulated process' memory proxy and then read in the path string from that memory space into the host's working memory space.

Translate target flags into host flags. Flags exist which are not ported between architectures which can cause check failures.

If the simulated process called open or openat with AT_FDCWD specified, take the current working directory value which was passed into the process class as a Python parameter and append the current path to create a full path. Otherwise, openat with a valid target directory file descriptor has been called. If the path option, which was passed in as a parameter, is not absolute, retrieve the directory file descriptor's path and prepend it to the path passed in as a parameter. In every case, we should have a full path (which is relevant to the host) to work with after this block has been passed.

Since this is an emulated environment, we create pseudo file descriptors for device requests that have been registered with the process class through Python; this allows us to create a file descriptor for subsequent ioctl or mmap calls.

Fall through here for pass through to host devices, such as /dev/zero

We make several attempts resolve a call to open.

1) Resolve any path redirection before hand. This will set the path up with variable 'redir_path' which may contain a modified path or the original path value. This should already be done in prior code. 2) Try to handle the access using 'special_paths'. Some special_paths and files cannot be called on the host and need to be handled as special cases inside the simulator. These special_paths are handled by C++ routines to provide output back to userspace. 3) If the full path that was created above does not match any of the special cases, pass it through to the open call on the HOST to let the host open the file on our behalf. Again, the openImpl tries to USE_THE_HOST_FILESYSTEM_OPEN (with a possible redirection to the faux-filesystem files). The faux-filesystem is dynamically created during simulator configuration using Python functions. 4) If the host cannot open the file, the open attempt failed in "3)". Return the host's error code back through the system call to the simulated process. If running a debug trace, also notify the user that the open call failed.

Any success will set sim_fd to something other than -1 and skip the next conditions effectively bypassing them.

The file was opened successfully and needs to be recorded in the process' file descriptor array so that it can be retrieved later. The target file descriptor that is chosen will be the lowest unused file descriptor. Return the indirect target file descriptor back to the simulated process to act as a handle for the opened file.

Definition at line 770 of file syscall_emul.hh.

References DPRINTF_SYSCALL, FileFDEntry::getFileName(), ThreadContext::getProcessPtr(), ThreadContext::getVirtProxy(), ArmISA::i, ArmISA::mode, SyscallDesc::name(), EmulatedDriver::open(), MipsISA::p, startswith(), PortProxy::tryReadString(), and warn.

◆ openFunc()

template<class OS >

SyscallReturn openFunc	(	SyscallDesc *	desc,
		ThreadContext *	tc,
		Addr	pathname,
		int	tgt_flags,
		int	mode
	)

Target open() handler.

Definition at line 919 of file syscall_emul.hh.

References ArmISA::mode.

◆ 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().

◆ pollFunc()

template<class OS >

SyscallReturn pollFunc	(	SyscallDesc *	desc,
		ThreadContext *	tc,
		Addr	fdsPtr,
		int	nfds,
		int	tmout
	)

Record the target file descriptors in a local variable. We need to replace them with host file descriptors but we need a temporary copy for later. Afterwards, replace each target file descriptor in the poll_fd array with its host_fd.

We cannot allow an infinite poll to occur or it will inevitably cause a deadlock in the gem5 simulator with clone. We must pass in tmout with a non-negative value, however it also makes no sense to poll on the underlying host for any other time than tmout a zero timeout.

If blocking indefinitely, check the signal list to see if a signal would break the poll out of the retry cycle and try to return the signal interrupt instead.

Replace each host_fd in the returned poll_fd array with its original target file descriptor.

Copy out the pollfd struct because the host may have updated fields in the structure.

Definition at line 1021 of file syscall_emul.hh.

References BufferArg::bufferPtr(), BaseBufferArg::copyIn(), BaseBufferArg::copyOut(), ArmISA::fd, ThreadContext::getProcessPtr(), ThreadContext::getSystemPtr(), ThreadContext::getVirtProxy(), MipsISA::index, MipsISA::p, SyscallReturn::retry(), System::signalList, and ArmISA::status.

◆ pread64Func()

template<class OS >

SyscallReturn pread64Func	(	SyscallDesc *	desc,
		ThreadContext *	tc,
		int	tgt_fd,
		Addr	bufPtr,
		int	nbytes,
		int	offset
	)

Definition at line 1785 of file syscall_emul.hh.

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

◆ prlimitFunc()

template<class OS >

SyscallReturn prlimitFunc	(	SyscallDesc *	desc,
		ThreadContext *	tc,
		int	pid,
		int	resource,
		Addr	n,
		Addr	o
	)

Definition at line 1877 of file syscall_emul.hh.

References PowerISA::bo, ArmISA::byteOrder(), BaseBufferArg::copyOut(), ThreadContext::getVirtProxy(), htog(), and warn.

◆ pwrite64Func()

template<class OS >

SyscallReturn pwrite64Func	(	SyscallDesc *	desc,
		ThreadContext *	tc,
		int	tgt_fd,
		Addr	bufPtr,
		int	nbytes,
		int	offset
	)

Definition at line 1806 of file syscall_emul.hh.

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

◆ readFunc()

template<class OS >

SyscallReturn readFunc	(	SyscallDesc *	desc,
		ThreadContext *	tc,
		int	tgt_fd,
		Addr	buf_ptr,
		int	nbytes
	)

Definition at line 2454 of file syscall_emul.hh.

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

◆ readlinkatFunc()

template<class OS >

SyscallReturn readlinkatFunc	(	SyscallDesc *	desc,
		ThreadContext *	tc,
		int	dirfd,
		Addr	pathname,
		Addr	buf,
		size_t	bufsiz
	)

Target readlinkat() handler.

Definition at line 951 of file syscall_emul.hh.

References readlinkFunc(), and warn.

◆ readlinkFunc()

SyscallReturn readlinkFunc	(	SyscallDesc *	desc,
		ThreadContext *	tc,
		Addr	pathname,
		Addr	buf,
		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().

◆ readvFunc()

template<class OS >

SyscallReturn readvFunc	(	SyscallDesc *	desc,
		ThreadContext *	tc,
		int	tgt_fd,
		uint64_t	tiov_base,
		size_t	count
	)

Target readv() handler.

Definition at line 1572 of file syscall_emul.hh.

References ArmISA::byteOrder(), X86ISA::count, ThreadContext::getProcessPtr(), ThreadContext::getVirtProxy(), gtoh(), htog(), ArmISA::i, MipsISA::p, PortProxy::readBlob(), and PortProxy::writeBlob().

◆ 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.

◆ renameatFunc()

template<class OS >

SyscallReturn renameatFunc	(	SyscallDesc *	desc,
		ThreadContext *	tc,
		int	olddirfd,
		Addr	oldpath,
		int	newdirfd,
		Addr	newpath
	)

Target renameat() handler.

Definition at line 962 of file syscall_emul.hh.

References renameFunc(), and warn.

◆ 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().

◆ selectFunc()

template<class OS >

SyscallReturn selectFunc	(	SyscallDesc *	desc,
		ThreadContext *	tc,
		int	nfds_t,
		Addr	fds_read_ptr,
		Addr	fds_writ_ptr,
		Addr	fds_excp_ptr,
		Addr	time_val_ptr
	)

Host fields. Notice that these use the definitions from the system headers instead of the gem5 headers and libraries. If the host and target have different header file definitions, this will not work.

Copy in the fd_set from the target.

We need to translate the target file descriptor set into a host file descriptor set. This involves both our internal process fd array and the fd_set defined in Linux header files. The nfds field also needs to be updated as it will be only target specific after retrieving it from the target; the nfds value is expected to be the highest file descriptor that needs to be checked, so we need to extend it out for nfds_h when we do the update.

By this point, we know that we are looking at a valid file descriptor set on the target. We need to check if the target file descriptor value passed in as iter is part of the set.

We know that the target file descriptor belongs to the set, but we do not yet know if the file descriptor is valid or that we have a host mapping. Check that now.

Add the sim_fd to tgt_fd translation into trans_map for use later when we need to zero the target fd_set structures and then update them with hits returned from the host select call.

We know that the host file descriptor exists so now we check if we need to update the max count for nfds_h before passing the duplicated structure into the host.

Add the host file descriptor to the set that we are going to pass into the host.

It might be possible to decrement the timeval based on some derivation of wall clock determined from elapsed simulator ticks but that seems like overkill. Rather, we just set the timeval with zero timeout. (There is no reason to block during the simulation as it only decreases simulator performance.)

If the timeval pointer is null, setup a new timeval structure to pass into the host select call. Unfortunately, we will need to manually check the return value and throw a retry fault if the return value is zero. Allowing the system call to block will likely deadlock the event queue.

If blocking indefinitely, check the signal list to see if a signal would break the poll out of the retry cycle and try to return the signal interrupt instead.

We need to translate the host file descriptor set into a target file descriptor set. This involves both our internal process fd array and the fd_set defined in header files.

Definition at line 2262 of file syscall_emul.hh.

References BaseBufferArg::copyIn(), BaseBufferArg::copyOut(), ThreadContext::getProcessPtr(), ThreadContext::getSystemPtr(), ThreadContext::getVirtProxy(), ArmISA::i, MipsISA::p, SyscallReturn::retry(), and System::signalList.

◆ 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.

◆ socketFunc()

template<class OS >

SyscallReturn socketFunc	(	SyscallDesc *	desc,
		ThreadContext *	tc,
		int	domain,
		int	type,
		int	prot
	)

Definition at line 2222 of file syscall_emul.hh.

References ArmISA::domain, ThreadContext::getProcessPtr(), MipsISA::p, X86ISA::prot, and type.

◆ socketpairFunc()

template<class OS >

SyscallReturn socketpairFunc	(	SyscallDesc *	desc,
		ThreadContext *	tc,
		int	domain,
		int	type,
		int	prot,
		Addr	svPtr
	)

Definition at line 2239 of file syscall_emul.hh.

References BufferArg::bufferPtr(), BaseBufferArg::copyOut(), ArmISA::domain, ThreadContext::getProcessPtr(), ThreadContext::getVirtProxy(), MipsISA::p, X86ISA::prot, ArmISA::status, and type.

◆ stat64Func()

template<class OS >

SyscallReturn stat64Func	(	SyscallDesc *	desc,
		ThreadContext *	tc,
		Addr	pathname,
		Addr	bufPtr
	)

Target stat64() handler.

Definition at line 1223 of file syscall_emul.hh.

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

◆ statfsFunc()

template<class OS >

SyscallReturn statfsFunc	(	SyscallDesc *	desc,
		ThreadContext *	tc,
		Addr	pathname,
		Addr	bufPtr
	)

Target statfs() handler.

Definition at line 1397 of file syscall_emul.hh.

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

◆ statFunc()

template<class OS >

SyscallReturn statFunc	(	SyscallDesc *	desc,
		ThreadContext *	tc,
		Addr	pathname,
		Addr	bufPtr
	)

Target stat() handler.

Definition at line 1197 of file syscall_emul.hh.

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

◆ 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.

◆ sysinfoFunc()

template<class OS >

SyscallReturn sysinfoFunc	(	SyscallDesc *	desc,
		ThreadContext *	tc,
		Addr	info
	)

Target sysinfo() handler.

Definition at line 977 of file syscall_emul.hh.

References BaseBufferArg::copyOut(), ThreadContext::getProcessPtr(), ThreadContext::getVirtProxy(), and seconds_since_epoch.

◆ tgkillFunc()

template<class OS >

SyscallReturn tgkillFunc	(	SyscallDesc *	desc,
		ThreadContext *	tc,
		int	tgid,
		int	tid,
		int	sig
	)

This system call is intended to allow killing a specific thread within an arbitrary thread group if sanctioned with permission checks. It's usually true that threads share the termination signal as pointed out by the pthread_kill man page and this seems to be the intended usage. Due to this being an emulated environment, assume the following: Threads are allowed to call tgkill because the EUID for all threads should be the same. There is no signal handling mechanism for kernel registration of signal handlers since signals are poorly supported in emulation mode. Since signal handlers cannot be registered, all threads within in a thread group must share the termination signal. We never exhaust PIDs so there's no chance of finding the wrong one due to PID rollover.

Definition at line 2178 of file syscall_emul.hh.

References exitGroupFunc(), ThreadContext::getSystemPtr(), ArmISA::i, System::numContexts(), Process::pid(), Process::tgid(), and System::threadContexts.

◆ timeFunc()

template<class OS >

SyscallReturn timeFunc	(	SyscallDesc *	desc,
		ThreadContext *	tc,
		Addr	taddr
	)

Target time() function.

Definition at line 2161 of file syscall_emul.hh.

References ArmISA::byteOrder(), getElapsedTimeMicro(), ThreadContext::getVirtProxy(), htog(), MipsISA::p, seconds_since_epoch, ArmISA::t, and PortProxy::writeBlob().

◆ timesFunc()

template<class OS >

SyscallReturn timesFunc	(	SyscallDesc *	desc,
		ThreadContext *	tc,
		Addr	bufPtr
	)

Target times() function.

Definition at line 2137 of file syscall_emul.hh.

References ArmISA::byteOrder(), BaseBufferArg::copyOut(), curTick(), ThreadContext::getVirtProxy(), htog(), and SimClock::Int::s.

◆ 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().

◆ unlinkatFunc()

template<class OS >

SyscallReturn unlinkatFunc	(	SyscallDesc *	desc,
		ThreadContext *	tc,
		int	dirfd,
		Addr	pathname
	)

Target unlinkat() handler.

Definition at line 929 of file syscall_emul.hh.

References unlinkFunc(), and warn.

◆ 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().

◆ utimesFunc()

template<class OS >

SyscallReturn utimesFunc	(	SyscallDesc *	desc,
		ThreadContext *	tc,
		Addr	pathname,
		Addr	times
	)

Target utimes() handler.

Definition at line 1968 of file syscall_emul.hh.

References ArmISA::byteOrder(), BaseBufferArg::copyIn(), ThreadContext::getProcessPtr(), ThreadContext::getVirtProxy(), gtoh(), ArmISA::i, and PortProxy::tryReadString().

◆ wait4Func()

template<class OS >

SyscallReturn wait4Func	(	SyscallDesc *	desc,
		ThreadContext *	tc,
		pid_t	pid,
		Addr	statPtr,
		int	options,
		Addr	rusagePtr
	)

Currently, wait4 is only implemented so that it will wait for children exit conditions which are denoted by a SIGCHLD signals posted into the system signal list. We return no additional information via any of the parameters supplied to wait4. If nothing is found in the system signal list, we will wait indefinitely for SIGCHLD to post by retrying the call.

Definition at line 2521 of file syscall_emul.hh.

References BufferArg::bufferPtr(), BaseBufferArg::copyOut(), DPRINTF_SYSCALL, ThreadContext::getProcessPtr(), ThreadContext::getSystemPtr(), ThreadContext::getVirtProxy(), MipsISA::p, SyscallReturn::retry(), and System::signalList.

◆ warnUnsupportedOS()

void warnUnsupportedOS ( std::string syscall_name )

Definition at line 59 of file syscall_emul.cc.

References warn.

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

◆ writeFunc()

template<class OS >

SyscallReturn writeFunc	(	SyscallDesc *	desc,
		ThreadContext *	tc,
		int	tgt_fd,
		Addr	buf_ptr,
		int	nbytes
	)

We don't want to poll on /dev/random. The kernel will not enable the file descriptor for writing unless the entropy in the system falls below write_wakeup_threshold. This is not guaranteed to happen depending on host settings.

Definition at line 2482 of file syscall_emul.hh.

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

◆ writevFunc()

template<class OS >

SyscallReturn writevFunc	(	SyscallDesc *	desc,
		ThreadContext *	tc,
		int	tgt_fd,
		uint64_t	tiov_base,
		size_t	count
	)

Target writev() handler.

Definition at line 1609 of file syscall_emul.hh.

References ArmISA::byteOrder(), X86ISA::count, ThreadContext::getProcessPtr(), ThreadContext::getVirtProxy(), gtoh(), ArmISA::i, MipsISA::p, and PortProxy::readBlob().

Variable Documentation

◆ seconds_since_epoch

const unsigned seconds_since_epoch = 1000 * 1000 * 1000

Approximate seconds since the epoch (1/1/1970).

About a billion, by my reckoning. We want to keep this a constant (not use the real-world time) to keep simulations repeatable.

Definition at line 505 of file syscall_emul.hh.

Referenced by clock_gettimeFunc(), gettimeofdayFunc(), sysinfoFunc(), and timeFunc().

Macros

Typedefs

Functions

Variables

Detailed Description

Macro Definition Documentation

◆ NO_STAT64

Typedef Documentation

◆ hst_stat

◆ hst_stat64

◆ hst_statfs

Function Documentation

◆ _llseekFunc()

◆ acceptFunc()

◆ accessFunc()

◆ bindFunc()

◆ brkFunc()

◆ chdirFunc()

◆ chmodFunc()

◆ chownFunc()

◆ clock_getresFunc()

◆ clock_gettimeFunc()

◆ cloneBackwardsFunc()

◆ cloneFunc()

◆ closeFunc()

◆ connectFunc()

◆ convertStat64Buf()

◆ convertStatBuf()

◆ copyOutStat64Buf()

◆ copyOutStatBuf()

◆ copyOutStatfsBuf()

◆ dup2Func()

◆ dupFunc()

◆ eventfdFunc()

◆ execveFunc()

◆ exitFunc()

◆ exitGroupFunc()

◆ faccessatFunc()

◆ fallocateFunc()

◆ fchmodFunc()

◆ fchownFunc()

◆ fcntl64Func()

◆ fcntlFunc()

◆ fstat64Func()

◆ fstatat64Func()

◆ fstatfsFunc()

◆ fstatFunc()

◆ ftruncate64Func()

◆ ftruncateFunc()

◆ futexFunc()

◆ getcwdFunc()

◆ getegidFunc()

◆ getElapsedTimeMicro()

◆ getElapsedTimeNano()

◆ geteuidFunc()

◆ getgidFunc()

◆ gethostnameFunc()

◆ getpagesizeFunc()

◆ getpeernameFunc()

◆ getpgrpFunc()

◆ getpidFunc()

◆ getppidFunc()

◆ getrlimitFunc()

◆ getrusageFunc()

◆ getsocknameFunc()

◆ getsockoptFunc()

◆ gettidFunc()

◆ gettimeofdayFunc()

◆ getuidFunc()

◆ ignoreFunc()

◆ ignoreWarnOnceFunc()

◆ ioctlFunc()

◆ linkFunc()

◆ listenFunc()

◆ lseekFunc()

◆ lstat64Func()

◆ lstatFunc()

◆ mkdirFunc()

◆ mknodFunc()

◆ mmap2Func()