syscall_emul.hh revision 2680
1360SN/A/*
21458SN/A * Copyright (c) 2003-2005 The Regents of The University of Michigan
3360SN/A * All rights reserved.
4360SN/A *
5360SN/A * Redistribution and use in source and binary forms, with or without
6360SN/A * modification, are permitted provided that the following conditions are
7360SN/A * met: redistributions of source code must retain the above copyright
8360SN/A * notice, this list of conditions and the following disclaimer;
9360SN/A * redistributions in binary form must reproduce the above copyright
10360SN/A * notice, this list of conditions and the following disclaimer in the
11360SN/A * documentation and/or other materials provided with the distribution;
12360SN/A * neither the name of the copyright holders nor the names of its
13360SN/A * contributors may be used to endorse or promote products derived from
14360SN/A * this software without specific prior written permission.
15360SN/A *
16360SN/A * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
17360SN/A * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
18360SN/A * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
19360SN/A * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
20360SN/A * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
21360SN/A * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
22360SN/A * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23360SN/A * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24360SN/A * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25360SN/A * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
26360SN/A * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
272665Ssaidi@eecs.umich.edu *
282665Ssaidi@eecs.umich.edu * Authors: Steve Reinhardt
292665Ssaidi@eecs.umich.edu *          Kevin Lim
30360SN/A */
31360SN/A
321354SN/A#ifndef __SIM_SYSCALL_EMUL_HH__
331354SN/A#define __SIM_SYSCALL_EMUL_HH__
34360SN/A
352064SN/A#define BSD_HOST (defined(__APPLE__) || defined(__OpenBSD__) || \
362064SN/A                  defined(__FreeBSD__))
372064SN/A
38360SN/A///
39360SN/A/// @file syscall_emul.hh
40360SN/A///
41360SN/A/// This file defines objects used to emulate syscalls from the target
42360SN/A/// application on the host machine.
43360SN/A
441354SN/A#include <errno.h>
45360SN/A#include <string>
461809SN/A#ifdef __CYGWIN32__
471809SN/A#include <sys/fcntl.h>	// for O_BINARY
481809SN/A#endif
491999SN/A#include <sys/uio.h>
50360SN/A
512474SN/A#include "arch/isa_traits.hh"	// for Addr
522474SN/A#include "base/chunk_generator.hh"
53360SN/A#include "base/intmath.hh"	// for RoundUp
542462SN/A#include "base/misc.hh"
551354SN/A#include "base/trace.hh"
562474SN/A#include "cpu/base.hh"
572680Sktlim@umich.edu#include "cpu/thread_context.hh"
582474SN/A#include "mem/translating_port.hh"
592474SN/A#include "mem/page_table.hh"
601354SN/A#include "sim/process.hh"
61360SN/A
62360SN/A///
63360SN/A/// System call descriptor.
64360SN/A///
65360SN/Aclass SyscallDesc {
66360SN/A
67360SN/A  public:
68360SN/A
69378SN/A    /// Typedef for target syscall handler functions.
701450SN/A    typedef SyscallReturn (*FuncPtr)(SyscallDesc *, int num,
712680Sktlim@umich.edu                           Process *, ThreadContext *);
72360SN/A
73360SN/A    const char *name;	//!< Syscall name (e.g., "open").
74360SN/A    FuncPtr funcPtr;	//!< Pointer to emulation function.
75360SN/A    int flags;		//!< Flags (see Flags enum).
76360SN/A
77360SN/A    /// Flag values for controlling syscall behavior.
78360SN/A    enum Flags {
79360SN/A        /// Don't set return regs according to funcPtr return value.
80360SN/A        /// Used for syscalls with non-standard return conventions
812680Sktlim@umich.edu        /// that explicitly set the ThreadContext regs (e.g.,
82360SN/A        /// sigreturn).
83360SN/A        SuppressReturnValue = 1
84360SN/A    };
85360SN/A
86360SN/A    /// Constructor.
87360SN/A    SyscallDesc(const char *_name, FuncPtr _funcPtr, int _flags = 0)
88360SN/A        : name(_name), funcPtr(_funcPtr), flags(_flags)
89360SN/A    {
90360SN/A    }
91360SN/A
92360SN/A    /// Emulate the syscall.  Public interface for calling through funcPtr.
932680Sktlim@umich.edu    void doSyscall(int callnum, Process *proc, ThreadContext *tc);
94360SN/A};
95360SN/A
96360SN/A
97360SN/Aclass BaseBufferArg {
98360SN/A
99360SN/A  public:
100360SN/A
101360SN/A    BaseBufferArg(Addr _addr, int _size) : addr(_addr), size(_size)
102360SN/A    {
103360SN/A        bufPtr = new uint8_t[size];
104360SN/A        // clear out buffer: in case we only partially populate this,
105360SN/A        // and then do a copyOut(), we want to make sure we don't
106360SN/A        // introduce any random junk into the simulated address space
107360SN/A        memset(bufPtr, 0, size);
108360SN/A    }
109360SN/A
110360SN/A    virtual ~BaseBufferArg() { delete [] bufPtr; }
111360SN/A
112360SN/A    //
113360SN/A    // copy data into simulator space (read from target memory)
114360SN/A    //
1152400SN/A    virtual bool copyIn(TranslatingPort *memport)
116360SN/A    {
1172461SN/A        memport->readBlob(addr, bufPtr, size);
118360SN/A        return true;	// no EFAULT detection for now
119360SN/A    }
120360SN/A
121360SN/A    //
122360SN/A    // copy data out of simulator space (write to target memory)
123360SN/A    //
1242400SN/A    virtual bool copyOut(TranslatingPort *memport)
125360SN/A    {
1262461SN/A        memport->writeBlob(addr, bufPtr, size);
127360SN/A        return true;	// no EFAULT detection for now
128360SN/A    }
129360SN/A
130360SN/A  protected:
131360SN/A    Addr addr;
132360SN/A    int size;
133360SN/A    uint8_t *bufPtr;
134360SN/A};
135360SN/A
136360SN/A
137360SN/Aclass BufferArg : public BaseBufferArg
138360SN/A{
139360SN/A  public:
140360SN/A    BufferArg(Addr _addr, int _size) : BaseBufferArg(_addr, _size) { }
141360SN/A    void *bufferPtr()	{ return bufPtr; }
142360SN/A};
143360SN/A
144360SN/Atemplate <class T>
145360SN/Aclass TypedBufferArg : public BaseBufferArg
146360SN/A{
147360SN/A  public:
148360SN/A    // user can optionally specify a specific number of bytes to
149360SN/A    // allocate to deal with those structs that have variable-size
150360SN/A    // arrays at the end
151360SN/A    TypedBufferArg(Addr _addr, int _size = sizeof(T))
152360SN/A        : BaseBufferArg(_addr, _size)
153360SN/A    { }
154360SN/A
155360SN/A    // type case
156360SN/A    operator T*() { return (T *)bufPtr; }
157360SN/A
158360SN/A    // dereference operators
159502SN/A    T &operator*()	 { return *((T *)bufPtr); }
160360SN/A    T* operator->()	 { return (T *)bufPtr; }
161502SN/A    T &operator[](int i) { return ((T *)bufPtr)[i]; }
162360SN/A};
163360SN/A
164360SN/A//////////////////////////////////////////////////////////////////////
165360SN/A//
166360SN/A// The following emulation functions are generic enough that they
167360SN/A// don't need to be recompiled for different emulated OS's.  They are
168360SN/A// defined in sim/syscall_emul.cc.
169360SN/A//
170360SN/A//////////////////////////////////////////////////////////////////////
171360SN/A
172360SN/A
173378SN/A/// Handler for unimplemented syscalls that we haven't thought about.
1741706SN/ASyscallReturn unimplementedFunc(SyscallDesc *desc, int num,
1752680Sktlim@umich.edu                                Process *p, ThreadContext *tc);
176378SN/A
177378SN/A/// Handler for unimplemented syscalls that we never intend to
178378SN/A/// implement (signal handling, etc.) and should not affect the correct
179378SN/A/// behavior of the program.  Print a warning only if the appropriate
180378SN/A/// trace flag is enabled.  Return success to the target program.
1811706SN/ASyscallReturn ignoreFunc(SyscallDesc *desc, int num,
1822680Sktlim@umich.edu                         Process *p, ThreadContext *tc);
183360SN/A
184378SN/A/// Target exit() handler: terminate simulation.
1851706SN/ASyscallReturn exitFunc(SyscallDesc *desc, int num,
1862680Sktlim@umich.edu                       Process *p, ThreadContext *tc);
187378SN/A
188378SN/A/// Target getpagesize() handler.
1891706SN/ASyscallReturn getpagesizeFunc(SyscallDesc *desc, int num,
1902680Sktlim@umich.edu                              Process *p, ThreadContext *tc);
191378SN/A
192378SN/A/// Target obreak() handler: set brk address.
1931706SN/ASyscallReturn obreakFunc(SyscallDesc *desc, int num,
1942680Sktlim@umich.edu                         Process *p, ThreadContext *tc);
195378SN/A
196378SN/A/// Target close() handler.
1971706SN/ASyscallReturn closeFunc(SyscallDesc *desc, int num,
1982680Sktlim@umich.edu                        Process *p, ThreadContext *tc);
199378SN/A
200378SN/A/// Target read() handler.
2011706SN/ASyscallReturn readFunc(SyscallDesc *desc, int num,
2022680Sktlim@umich.edu                       Process *p, ThreadContext *tc);
203378SN/A
204378SN/A/// Target write() handler.
2051706SN/ASyscallReturn writeFunc(SyscallDesc *desc, int num,
2062680Sktlim@umich.edu                        Process *p, ThreadContext *tc);
207378SN/A
208378SN/A/// Target lseek() handler.
2091706SN/ASyscallReturn lseekFunc(SyscallDesc *desc, int num,
2102680Sktlim@umich.edu                        Process *p, ThreadContext *tc);
211378SN/A
212378SN/A/// Target munmap() handler.
2131706SN/ASyscallReturn munmapFunc(SyscallDesc *desc, int num,
2142680Sktlim@umich.edu                         Process *p, ThreadContext *tc);
215378SN/A
216378SN/A/// Target gethostname() handler.
2171706SN/ASyscallReturn gethostnameFunc(SyscallDesc *desc, int num,
2182680Sktlim@umich.edu                              Process *p, ThreadContext *tc);
219360SN/A
220511SN/A/// Target unlink() handler.
2211706SN/ASyscallReturn unlinkFunc(SyscallDesc *desc, int num,
2222680Sktlim@umich.edu                         Process *p, ThreadContext *tc);
223511SN/A
224511SN/A/// Target rename() handler.
2251706SN/ASyscallReturn renameFunc(SyscallDesc *desc, int num,
2262680Sktlim@umich.edu                         Process *p, ThreadContext *tc);
2271706SN/A
2281706SN/A
2291706SN/A/// Target truncate() handler.
2301706SN/ASyscallReturn truncateFunc(SyscallDesc *desc, int num,
2312680Sktlim@umich.edu                           Process *p, ThreadContext *tc);
2321706SN/A
2331706SN/A
2341706SN/A/// Target ftruncate() handler.
2351706SN/ASyscallReturn ftruncateFunc(SyscallDesc *desc, int num,
2362680Sktlim@umich.edu                            Process *p, ThreadContext *tc);
2371706SN/A
238511SN/A
2391999SN/A/// Target chown() handler.
2401999SN/ASyscallReturn chownFunc(SyscallDesc *desc, int num,
2412680Sktlim@umich.edu                        Process *p, ThreadContext *tc);
2421999SN/A
2431999SN/A
2441999SN/A/// Target fchown() handler.
2451999SN/ASyscallReturn fchownFunc(SyscallDesc *desc, int num,
2462680Sktlim@umich.edu                         Process *p, ThreadContext *tc);
2471999SN/A
2482093SN/A/// Target fnctl() handler.
2492093SN/ASyscallReturn fcntlFunc(SyscallDesc *desc, int num,
2502680Sktlim@umich.edu                        Process *process, ThreadContext *tc);
2512093SN/A
2522238SN/A/// Target setuid() handler.
2532238SN/ASyscallReturn setuidFunc(SyscallDesc *desc, int num,
2542680Sktlim@umich.edu                               Process *p, ThreadContext *tc);
2552238SN/A
2562238SN/A/// Target getpid() handler.
2572238SN/ASyscallReturn getpidFunc(SyscallDesc *desc, int num,
2582680Sktlim@umich.edu                               Process *p, ThreadContext *tc);
2592238SN/A
2602238SN/A/// Target getuid() handler.
2612238SN/ASyscallReturn getuidFunc(SyscallDesc *desc, int num,
2622680Sktlim@umich.edu                               Process *p, ThreadContext *tc);
2632238SN/A
2642238SN/A/// Target getgid() handler.
2652238SN/ASyscallReturn getgidFunc(SyscallDesc *desc, int num,
2662680Sktlim@umich.edu                               Process *p, ThreadContext *tc);
2672238SN/A
2682238SN/A/// Target getppid() handler.
2692238SN/ASyscallReturn getppidFunc(SyscallDesc *desc, int num,
2702680Sktlim@umich.edu                               Process *p, ThreadContext *tc);
2712238SN/A
2722238SN/A/// Target geteuid() handler.
2732238SN/ASyscallReturn geteuidFunc(SyscallDesc *desc, int num,
2742680Sktlim@umich.edu                               Process *p, ThreadContext *tc);
2752238SN/A
2762238SN/A/// Target getegid() handler.
2772238SN/ASyscallReturn getegidFunc(SyscallDesc *desc, int num,
2782680Sktlim@umich.edu                               Process *p, ThreadContext *tc);
2792238SN/A
2802238SN/A
2812238SN/A
2822238SN/A/// Pseudo Funcs  - These functions use a different return convension,
2832238SN/A/// returning a second value in a register other than the normal return register
2842238SN/ASyscallReturn pipePseudoFunc(SyscallDesc *desc, int num,
2852680Sktlim@umich.edu                             Process *process, ThreadContext *tc);
2862238SN/A
2872238SN/A/// Target getpidPseudo() handler.
2882238SN/ASyscallReturn getpidPseudoFunc(SyscallDesc *desc, int num,
2892680Sktlim@umich.edu                               Process *p, ThreadContext *tc);
2902238SN/A
2912238SN/A/// Target getuidPseudo() handler.
2922238SN/ASyscallReturn getuidPseudoFunc(SyscallDesc *desc, int num,
2932680Sktlim@umich.edu                               Process *p, ThreadContext *tc);
2942238SN/A
2952238SN/A/// Target getgidPseudo() handler.
2962238SN/ASyscallReturn getgidPseudoFunc(SyscallDesc *desc, int num,
2972680Sktlim@umich.edu                               Process *p, ThreadContext *tc);
2982238SN/A
2992238SN/A
3001354SN/A/// This struct is used to build an target-OS-dependent table that
3011354SN/A/// maps the target's open() flags to the host open() flags.
3021354SN/Astruct OpenFlagTransTable {
3031354SN/A    int tgtFlag;	//!< Target system flag value.
3041354SN/A    int hostFlag;	//!< Corresponding host system flag value.
3051354SN/A};
3061354SN/A
3071354SN/A
3081354SN/A
3091354SN/A/// A readable name for 1,000,000, for converting microseconds to seconds.
3101354SN/Aconst int one_million = 1000000;
3111354SN/A
3121354SN/A/// Approximate seconds since the epoch (1/1/1970).  About a billion,
3131354SN/A/// by my reckoning.  We want to keep this a constant (not use the
3141354SN/A/// real-world time) to keep simulations repeatable.
3151354SN/Aconst unsigned seconds_since_epoch = 1000000000;
3161354SN/A
3171354SN/A/// Helper function to convert current elapsed time to seconds and
3181354SN/A/// microseconds.
3191354SN/Atemplate <class T1, class T2>
3201354SN/Avoid
3211354SN/AgetElapsedTime(T1 &sec, T2 &usec)
3221354SN/A{
3231609SN/A    int elapsed_usecs = curTick / Clock::Int::us;
3241354SN/A    sec = elapsed_usecs / one_million;
3251354SN/A    usec = elapsed_usecs % one_million;
3261354SN/A}
3271354SN/A
328360SN/A//////////////////////////////////////////////////////////////////////
329360SN/A//
330360SN/A// The following emulation functions are generic, but need to be
331360SN/A// templated to account for differences in types, constants, etc.
332360SN/A//
333360SN/A//////////////////////////////////////////////////////////////////////
334360SN/A
335378SN/A/// Target ioctl() handler.  For the most part, programs call ioctl()
336378SN/A/// only to find out if their stdout is a tty, to determine whether to
337378SN/A/// do line or block buffering.
338360SN/Atemplate <class OS>
3391450SN/ASyscallReturn
340360SN/AioctlFunc(SyscallDesc *desc, int callnum, Process *process,
3412680Sktlim@umich.edu          ThreadContext *tc)
342360SN/A{
3432680Sktlim@umich.edu    int fd = tc->getSyscallArg(0);
3442680Sktlim@umich.edu    unsigned req = tc->getSyscallArg(1);
345360SN/A
3461969SN/A    DPRINTF(SyscallVerbose, "ioctl(%d, 0x%x, ...)\n", fd, req);
347360SN/A
348360SN/A    if (fd < 0 || process->sim_fd(fd) < 0) {
349360SN/A        // doesn't map to any simulator fd: not a valid target fd
3501458SN/A        return -EBADF;
351360SN/A    }
352360SN/A
353360SN/A    switch (req) {
3542553SN/A      case OS::TIOCISATTY:
3552553SN/A      case OS::TIOCGETP:
3562553SN/A      case OS::TIOCSETP:
3572553SN/A      case OS::TIOCSETN:
3582553SN/A      case OS::TIOCSETC:
3592553SN/A      case OS::TIOCGETC:
3602553SN/A      case OS::TIOCGETS:
3612553SN/A      case OS::TIOCGETA:
3621458SN/A        return -ENOTTY;
363360SN/A
364360SN/A      default:
3651706SN/A        fatal("Unsupported ioctl call: ioctl(%d, 0x%x, ...) @ 0x%llx\n",
3662680Sktlim@umich.edu              fd, req, tc->readPC());
367360SN/A    }
368360SN/A}
369360SN/A
370378SN/A/// Target open() handler.
371360SN/Atemplate <class OS>
3721450SN/ASyscallReturn
373360SN/AopenFunc(SyscallDesc *desc, int callnum, Process *process,
3742680Sktlim@umich.edu         ThreadContext *tc)
375360SN/A{
376360SN/A    std::string path;
377360SN/A
3782680Sktlim@umich.edu    if (!tc->getMemPort()->tryReadString(path, tc->getSyscallArg(0)))
3791458SN/A        return -EFAULT;
380360SN/A
381360SN/A    if (path == "/dev/sysdev0") {
382360SN/A        // This is a memory-mapped high-resolution timer device on Alpha.
383360SN/A        // We don't support it, so just punt.
3841706SN/A        warn("Ignoring open(%s, ...)\n", path);
3851458SN/A        return -ENOENT;
386360SN/A    }
387360SN/A
3882680Sktlim@umich.edu    int tgtFlags = tc->getSyscallArg(1);
3892680Sktlim@umich.edu    int mode = tc->getSyscallArg(2);
390360SN/A    int hostFlags = 0;
391360SN/A
392360SN/A    // translate open flags
393360SN/A    for (int i = 0; i < OS::NUM_OPEN_FLAGS; i++) {
394360SN/A        if (tgtFlags & OS::openFlagTable[i].tgtFlag) {
395360SN/A            tgtFlags &= ~OS::openFlagTable[i].tgtFlag;
396360SN/A            hostFlags |= OS::openFlagTable[i].hostFlag;
397360SN/A        }
398360SN/A    }
399360SN/A
400360SN/A    // any target flags left?
401360SN/A    if (tgtFlags != 0)
4021706SN/A        warn("Syscall: open: cannot decode flags 0x%x", tgtFlags);
403360SN/A
404360SN/A#ifdef __CYGWIN32__
405360SN/A    hostFlags |= O_BINARY;
406360SN/A#endif
407360SN/A
4081706SN/A    DPRINTF(SyscallVerbose, "opening file %s\n", path.c_str());
4091706SN/A
410360SN/A    // open the file
411360SN/A    int fd = open(path.c_str(), hostFlags, mode);
412360SN/A
4131970SN/A    return (fd == -1) ? -errno : process->alloc_fd(fd);
414360SN/A}
415360SN/A
416360SN/A
4171999SN/A/// Target chmod() handler.
4181999SN/Atemplate <class OS>
4191999SN/ASyscallReturn
4201999SN/AchmodFunc(SyscallDesc *desc, int callnum, Process *process,
4212680Sktlim@umich.edu          ThreadContext *tc)
4221999SN/A{
4231999SN/A    std::string path;
4241999SN/A
4252680Sktlim@umich.edu    if (!tc->getMemPort()->tryReadString(path, tc->getSyscallArg(0)))
4261999SN/A        return -EFAULT;
4271999SN/A
4282680Sktlim@umich.edu    uint32_t mode = tc->getSyscallArg(1);
4291999SN/A    mode_t hostMode = 0;
4301999SN/A
4311999SN/A    // XXX translate mode flags via OS::something???
4321999SN/A    hostMode = mode;
4331999SN/A
4341999SN/A    // do the chmod
4351999SN/A    int result = chmod(path.c_str(), hostMode);
4361999SN/A    if (result < 0)
4372218SN/A        return -errno;
4381999SN/A
4391999SN/A    return 0;
4401999SN/A}
4411999SN/A
4421999SN/A
4431999SN/A/// Target fchmod() handler.
4441999SN/Atemplate <class OS>
4451999SN/ASyscallReturn
4461999SN/AfchmodFunc(SyscallDesc *desc, int callnum, Process *process,
4472680Sktlim@umich.edu           ThreadContext *tc)
4481999SN/A{
4492680Sktlim@umich.edu    int fd = tc->getSyscallArg(0);
4501999SN/A    if (fd < 0 || process->sim_fd(fd) < 0) {
4511999SN/A        // doesn't map to any simulator fd: not a valid target fd
4521999SN/A        return -EBADF;
4531999SN/A    }
4541999SN/A
4552680Sktlim@umich.edu    uint32_t mode = tc->getSyscallArg(1);
4561999SN/A    mode_t hostMode = 0;
4571999SN/A
4581999SN/A    // XXX translate mode flags via OS::someting???
4591999SN/A    hostMode = mode;
4601999SN/A
4611999SN/A    // do the fchmod
4621999SN/A    int result = fchmod(process->sim_fd(fd), hostMode);
4631999SN/A    if (result < 0)
4642218SN/A        return -errno;
4651999SN/A
4661999SN/A    return 0;
4671999SN/A}
4681999SN/A
4691999SN/A
470378SN/A/// Target stat() handler.
471360SN/Atemplate <class OS>
4721450SN/ASyscallReturn
473360SN/AstatFunc(SyscallDesc *desc, int callnum, Process *process,
4742680Sktlim@umich.edu         ThreadContext *tc)
475360SN/A{
476360SN/A    std::string path;
477360SN/A
4782680Sktlim@umich.edu    if (!tc->getMemPort()->tryReadString(path, tc->getSyscallArg(0)))
4792400SN/A    return -EFAULT;
480360SN/A
481360SN/A    struct stat hostBuf;
482360SN/A    int result = stat(path.c_str(), &hostBuf);
483360SN/A
484360SN/A    if (result < 0)
4852218SN/A        return -errno;
486360SN/A
4872680Sktlim@umich.edu    OS::copyOutStatBuf(tc->getMemPort(), tc->getSyscallArg(1), &hostBuf);
488360SN/A
4891458SN/A    return 0;
490360SN/A}
491360SN/A
492360SN/A
4931999SN/A/// Target fstat64() handler.
4941999SN/Atemplate <class OS>
4951999SN/ASyscallReturn
4961999SN/Afstat64Func(SyscallDesc *desc, int callnum, Process *process,
4972680Sktlim@umich.edu            ThreadContext *tc)
4981999SN/A{
4992680Sktlim@umich.edu    int fd = tc->getSyscallArg(0);
5001999SN/A    if (fd < 0 || process->sim_fd(fd) < 0) {
5011999SN/A        // doesn't map to any simulator fd: not a valid target fd
5021999SN/A        return -EBADF;
5031999SN/A    }
5041999SN/A
5052067SN/A#if BSD_HOST
5062064SN/A    struct stat  hostBuf;
5072064SN/A    int result = fstat(process->sim_fd(fd), &hostBuf);
5082064SN/A#else
5092064SN/A    struct stat64  hostBuf;
5101999SN/A    int result = fstat64(process->sim_fd(fd), &hostBuf);
5112064SN/A#endif
5121999SN/A
5131999SN/A    if (result < 0)
5142218SN/A        return -errno;
5151999SN/A
5162680Sktlim@umich.edu    OS::copyOutStat64Buf(tc->getMemPort(), fd, tc->getSyscallArg(1), &hostBuf);
5171999SN/A
5181999SN/A    return 0;
5191999SN/A}
5201999SN/A
5211999SN/A
522378SN/A/// Target lstat() handler.
523360SN/Atemplate <class OS>
5241450SN/ASyscallReturn
525360SN/AlstatFunc(SyscallDesc *desc, int callnum, Process *process,
5262680Sktlim@umich.edu          ThreadContext *tc)
527360SN/A{
528360SN/A    std::string path;
529360SN/A
5302680Sktlim@umich.edu    if (!tc->getMemPort()->tryReadString(path, tc->getSyscallArg(0)))
5312400SN/A      return -EFAULT;
532360SN/A
533360SN/A    struct stat hostBuf;
534360SN/A    int result = lstat(path.c_str(), &hostBuf);
535360SN/A
536360SN/A    if (result < 0)
5371458SN/A        return -errno;
538360SN/A
5392680Sktlim@umich.edu    OS::copyOutStatBuf(tc->getMemPort(), tc->getSyscallArg(1), &hostBuf);
540360SN/A
5411458SN/A    return 0;
542360SN/A}
543360SN/A
5441999SN/A/// Target lstat64() handler.
5451999SN/Atemplate <class OS>
5461999SN/ASyscallReturn
5471999SN/Alstat64Func(SyscallDesc *desc, int callnum, Process *process,
5482680Sktlim@umich.edu            ThreadContext *tc)
5491999SN/A{
5501999SN/A    std::string path;
5511999SN/A
5522680Sktlim@umich.edu    if (!tc->getMemPort()->tryReadString(path, tc->getSyscallArg(0)))
5532400SN/A      return -EFAULT;
5541999SN/A
5552067SN/A#if BSD_HOST
5562064SN/A    struct stat hostBuf;
5572064SN/A    int result = lstat(path.c_str(), &hostBuf);
5582064SN/A#else
5591999SN/A    struct stat64 hostBuf;
5601999SN/A    int result = lstat64(path.c_str(), &hostBuf);
5612064SN/A#endif
5621999SN/A
5631999SN/A    if (result < 0)
5641999SN/A        return -errno;
5651999SN/A
5662680Sktlim@umich.edu    OS::copyOutStat64Buf(tc->getMemPort(), -1, tc->getSyscallArg(1), &hostBuf);
5671999SN/A
5681999SN/A    return 0;
5691999SN/A}
5701999SN/A
571378SN/A/// Target fstat() handler.
572360SN/Atemplate <class OS>
5731450SN/ASyscallReturn
574360SN/AfstatFunc(SyscallDesc *desc, int callnum, Process *process,
5752680Sktlim@umich.edu          ThreadContext *tc)
576360SN/A{
5772680Sktlim@umich.edu    int fd = process->sim_fd(tc->getSyscallArg(0));
578360SN/A
5791969SN/A    DPRINTF(SyscallVerbose, "fstat(%d, ...)\n", fd);
580360SN/A
581360SN/A    if (fd < 0)
5821458SN/A        return -EBADF;
583360SN/A
584360SN/A    struct stat hostBuf;
585360SN/A    int result = fstat(fd, &hostBuf);
586360SN/A
587360SN/A    if (result < 0)
5881458SN/A        return -errno;
589360SN/A
5902680Sktlim@umich.edu    OS::copyOutStatBuf(tc->getMemPort(), tc->getSyscallArg(1), &hostBuf);
5912021SN/A
5921458SN/A    return 0;
593360SN/A}
594360SN/A
595360SN/A
5961706SN/A/// Target statfs() handler.
5971706SN/Atemplate <class OS>
5981706SN/ASyscallReturn
5991706SN/AstatfsFunc(SyscallDesc *desc, int callnum, Process *process,
6002680Sktlim@umich.edu           ThreadContext *tc)
6011706SN/A{
6021706SN/A    std::string path;
6031706SN/A
6042680Sktlim@umich.edu    if (!tc->getMemPort()->tryReadString(path, tc->getSyscallArg(0)))
6052400SN/A      return -EFAULT;
6061706SN/A
6071706SN/A    struct statfs hostBuf;
6081706SN/A    int result = statfs(path.c_str(), &hostBuf);
6091706SN/A
6101706SN/A    if (result < 0)
6112218SN/A        return -errno;
6121706SN/A
6132680Sktlim@umich.edu    OS::copyOutStatfsBuf(tc->getMemPort(), tc->getSyscallArg(1), &hostBuf);
6141706SN/A
6151706SN/A    return 0;
6161706SN/A}
6171706SN/A
6181706SN/A
6191706SN/A/// Target fstatfs() handler.
6201706SN/Atemplate <class OS>
6211706SN/ASyscallReturn
6221706SN/AfstatfsFunc(SyscallDesc *desc, int callnum, Process *process,
6232680Sktlim@umich.edu            ThreadContext *tc)
6241706SN/A{
6252680Sktlim@umich.edu    int fd = process->sim_fd(tc->getSyscallArg(0));
6261706SN/A
6271706SN/A    if (fd < 0)
6281706SN/A        return -EBADF;
6291706SN/A
6301706SN/A    struct statfs hostBuf;
6311706SN/A    int result = fstatfs(fd, &hostBuf);
6321706SN/A
6331706SN/A    if (result < 0)
6342218SN/A        return -errno;
6351706SN/A
6362680Sktlim@umich.edu    OS::copyOutStatfsBuf(tc->getMemPort(), tc->getSyscallArg(1), &hostBuf);
6371706SN/A
6381706SN/A    return 0;
6391706SN/A}
6401706SN/A
6411706SN/A
6421999SN/A/// Target writev() handler.
6431999SN/Atemplate <class OS>
6441999SN/ASyscallReturn
6451999SN/AwritevFunc(SyscallDesc *desc, int callnum, Process *process,
6462680Sktlim@umich.edu           ThreadContext *tc)
6471999SN/A{
6482680Sktlim@umich.edu    int fd = tc->getSyscallArg(0);
6491999SN/A    if (fd < 0 || process->sim_fd(fd) < 0) {
6501999SN/A        // doesn't map to any simulator fd: not a valid target fd
6511999SN/A        return -EBADF;
6521999SN/A    }
6531999SN/A
6542680Sktlim@umich.edu    TranslatingPort *p = tc->getMemPort();
6552680Sktlim@umich.edu    uint64_t tiov_base = tc->getSyscallArg(1);
6562680Sktlim@umich.edu    size_t count = tc->getSyscallArg(2);
6571999SN/A    struct iovec hiov[count];
6581999SN/A    for (int i = 0; i < count; ++i)
6591999SN/A    {
6601999SN/A        typename OS::tgt_iovec tiov;
6612461SN/A
6622461SN/A        p->readBlob(tiov_base + i*sizeof(typename OS::tgt_iovec),
6632461SN/A                    (uint8_t*)&tiov, sizeof(typename OS::tgt_iovec));
6642091SN/A        hiov[i].iov_len = gtoh(tiov.iov_len);
6651999SN/A        hiov[i].iov_base = new char [hiov[i].iov_len];
6662461SN/A        p->readBlob(gtoh(tiov.iov_base), (uint8_t *)hiov[i].iov_base,
6672461SN/A                    hiov[i].iov_len);
6681999SN/A    }
6691999SN/A
6701999SN/A    int result = writev(process->sim_fd(fd), hiov, count);
6711999SN/A
6721999SN/A    for (int i = 0; i < count; ++i)
6731999SN/A    {
6741999SN/A        delete [] (char *)hiov[i].iov_base;
6751999SN/A    }
6761999SN/A
6771999SN/A    if (result < 0)
6782218SN/A        return -errno;
6791999SN/A
6801999SN/A    return 0;
6811999SN/A}
6821999SN/A
6831999SN/A
684378SN/A/// Target mmap() handler.
685378SN/A///
686378SN/A/// We don't really handle mmap().  If the target is mmaping an
687378SN/A/// anonymous region or /dev/zero, we can get away with doing basically
688378SN/A/// nothing (since memory is initialized to zero and the simulator
689378SN/A/// doesn't really check addresses anyway).  Always print a warning,
690378SN/A/// since this could be seriously broken if we're not mapping
691378SN/A/// /dev/zero.
692360SN/A//
693378SN/A/// Someday we should explicitly check for /dev/zero in open, flag the
694378SN/A/// file descriptor, and fail (or implement!) a non-anonymous mmap to
695378SN/A/// anything else.
696360SN/Atemplate <class OS>
6971450SN/ASyscallReturn
6982680Sktlim@umich.edummapFunc(SyscallDesc *desc, int num, Process *p, ThreadContext *tc)
699360SN/A{
7002680Sktlim@umich.edu    Addr start = tc->getSyscallArg(0);
7012680Sktlim@umich.edu    uint64_t length = tc->getSyscallArg(1);
7022680Sktlim@umich.edu    // int prot = tc->getSyscallArg(2);
7032680Sktlim@umich.edu    int flags = tc->getSyscallArg(3);
7042680Sktlim@umich.edu    // int fd = p->sim_fd(tc->getSyscallArg(4));
7052680Sktlim@umich.edu    // int offset = tc->getSyscallArg(5);
706360SN/A
7072544SN/A    if ((start  % TheISA::VMPageSize) != 0 ||
7082544SN/A        (length % TheISA::VMPageSize) != 0) {
7092544SN/A        warn("mmap failing: arguments not page-aligned: "
7102544SN/A             "start 0x%x length 0x%x",
7112544SN/A             start, length);
7122544SN/A        return -EINVAL;
713360SN/A    }
714360SN/A
7152544SN/A    if (start != 0) {
7162544SN/A        warn("mmap: ignoring suggested map address 0x%x, using 0x%x",
7172544SN/A             start, p->mmap_end);
7182544SN/A    }
7192544SN/A
7202544SN/A    // pick next address from our "mmap region"
7212544SN/A    start = p->mmap_end;
7222544SN/A    p->pTable->allocate(start, length);
7232544SN/A    p->mmap_end += length;
7242544SN/A
7252553SN/A    if (!(flags & OS::TGT_MAP_ANONYMOUS)) {
7261969SN/A        warn("allowing mmap of file @ fd %d. "
7272680Sktlim@umich.edu             "This will break if not /dev/zero.", tc->getSyscallArg(4));
728360SN/A    }
729360SN/A
7301458SN/A    return start;
731360SN/A}
732360SN/A
733378SN/A/// Target getrlimit() handler.
734360SN/Atemplate <class OS>
7351450SN/ASyscallReturn
736360SN/AgetrlimitFunc(SyscallDesc *desc, int callnum, Process *process,
7372680Sktlim@umich.edu        ThreadContext *tc)
738360SN/A{
7392680Sktlim@umich.edu    unsigned resource = tc->getSyscallArg(0);
7402680Sktlim@umich.edu    TypedBufferArg<typename OS::rlimit> rlp(tc->getSyscallArg(1));
741360SN/A
742360SN/A    switch (resource) {
7432064SN/A        case OS::TGT_RLIMIT_STACK:
7442064SN/A            // max stack size in bytes: make up a number (2MB for now)
7452064SN/A            rlp->rlim_cur = rlp->rlim_max = 8 * 1024 * 1024;
7462091SN/A            rlp->rlim_cur = htog(rlp->rlim_cur);
7472091SN/A            rlp->rlim_max = htog(rlp->rlim_max);
7482064SN/A            break;
749360SN/A
7502064SN/A        default:
7512064SN/A            std::cerr << "getrlimitFunc: unimplemented resource " << resource
7522064SN/A                << std::endl;
7532064SN/A            abort();
7542064SN/A            break;
755360SN/A    }
756360SN/A
7572680Sktlim@umich.edu    rlp.copyOut(tc->getMemPort());
7581458SN/A    return 0;
759360SN/A}
760360SN/A
761378SN/A/// Target gettimeofday() handler.
762360SN/Atemplate <class OS>
7631450SN/ASyscallReturn
764360SN/AgettimeofdayFunc(SyscallDesc *desc, int callnum, Process *process,
7652680Sktlim@umich.edu        ThreadContext *tc)
766360SN/A{
7672680Sktlim@umich.edu    TypedBufferArg<typename OS::timeval> tp(tc->getSyscallArg(0));
768360SN/A
769360SN/A    getElapsedTime(tp->tv_sec, tp->tv_usec);
770360SN/A    tp->tv_sec += seconds_since_epoch;
7712091SN/A    tp->tv_sec = htog(tp->tv_sec);
7722091SN/A    tp->tv_usec = htog(tp->tv_usec);
773360SN/A
7742680Sktlim@umich.edu    tp.copyOut(tc->getMemPort());
775360SN/A
7761458SN/A    return 0;
777360SN/A}
778360SN/A
779360SN/A
7801999SN/A/// Target utimes() handler.
7811999SN/Atemplate <class OS>
7821999SN/ASyscallReturn
7831999SN/AutimesFunc(SyscallDesc *desc, int callnum, Process *process,
7842680Sktlim@umich.edu           ThreadContext *tc)
7851999SN/A{
7861999SN/A    std::string path;
7871999SN/A
7882680Sktlim@umich.edu    if (!tc->getMemPort()->tryReadString(path, tc->getSyscallArg(0)))
7892400SN/A      return -EFAULT;
7901999SN/A
7912680Sktlim@umich.edu    TypedBufferArg<typename OS::timeval [2]> tp(tc->getSyscallArg(1));
7922680Sktlim@umich.edu    tp.copyIn(tc->getMemPort());
7931999SN/A
7941999SN/A    struct timeval hostTimeval[2];
7951999SN/A    for (int i = 0; i < 2; ++i)
7961999SN/A    {
7972091SN/A        hostTimeval[i].tv_sec = gtoh((*tp)[i].tv_sec);
7982091SN/A        hostTimeval[i].tv_usec = gtoh((*tp)[i].tv_usec);
7991999SN/A    }
8001999SN/A    int result = utimes(path.c_str(), hostTimeval);
8011999SN/A
8021999SN/A    if (result < 0)
8031999SN/A        return -errno;
8041999SN/A
8051999SN/A    return 0;
8061999SN/A}
807378SN/A/// Target getrusage() function.
808360SN/Atemplate <class OS>
8091450SN/ASyscallReturn
810360SN/AgetrusageFunc(SyscallDesc *desc, int callnum, Process *process,
8112680Sktlim@umich.edu              ThreadContext *tc)
812360SN/A{
8132680Sktlim@umich.edu    int who = tc->getSyscallArg(0);	// THREAD, SELF, or CHILDREN
8142680Sktlim@umich.edu    TypedBufferArg<typename OS::rusage> rup(tc->getSyscallArg(1));
815360SN/A
8162553SN/A    if (who != OS::TGT_RUSAGE_SELF) {
817360SN/A        // don't really handle THREAD or CHILDREN, but just warn and
818360SN/A        // plow ahead
8191969SN/A        warn("getrusage() only supports RUSAGE_SELF.  Parameter %d ignored.",
8201969SN/A             who);
821360SN/A    }
822360SN/A
823360SN/A    getElapsedTime(rup->ru_utime.tv_sec, rup->ru_utime.tv_usec);
8242091SN/A    rup->ru_utime.tv_sec = htog(rup->ru_utime.tv_sec);
8252091SN/A    rup->ru_utime.tv_usec = htog(rup->ru_utime.tv_usec);
8262091SN/A
827360SN/A    rup->ru_stime.tv_sec = 0;
828360SN/A    rup->ru_stime.tv_usec = 0;
829360SN/A    rup->ru_maxrss = 0;
830360SN/A    rup->ru_ixrss = 0;
831360SN/A    rup->ru_idrss = 0;
832360SN/A    rup->ru_isrss = 0;
833360SN/A    rup->ru_minflt = 0;
834360SN/A    rup->ru_majflt = 0;
835360SN/A    rup->ru_nswap = 0;
836360SN/A    rup->ru_inblock = 0;
837360SN/A    rup->ru_oublock = 0;
838360SN/A    rup->ru_msgsnd = 0;
839360SN/A    rup->ru_msgrcv = 0;
840360SN/A    rup->ru_nsignals = 0;
841360SN/A    rup->ru_nvcsw = 0;
842360SN/A    rup->ru_nivcsw = 0;
843360SN/A
8442680Sktlim@umich.edu    rup.copyOut(tc->getMemPort());
845360SN/A
8461458SN/A    return 0;
847360SN/A}
848360SN/A
8492553SN/A
8502553SN/A
8512553SN/A
8521354SN/A#endif // __SIM_SYSCALL_EMUL_HH__
853