2 * Copyright (c) 2003 The Regents of The University of Michigan
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are
7 * met: redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer;
9 * redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution;
12 * neither the name of the copyright holders nor the names of its
13 * contributors may be used to endorse or promote products derived from
14 * this software without specific prior written permission.
16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
17 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
18 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
19 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
20 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
21 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
22 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
34 #include "sim/syscall_emul.hh"
35 #include "base/trace.hh"
36 #include "cpu/exec_context.hh"
37 #include "cpu/base_cpu.hh"
38 #include "sim/process.hh"
40 #include "sim/sim_events.hh"
45 SyscallDesc::doSyscall(int callnum
, Process
*process
, ExecContext
*xc
)
47 DPRINTFR(SyscallVerbose
, "%s: syscall %s called\n",
48 xc
->cpu
->name(), name
);
50 int retval
= (*funcPtr
)(this, callnum
, process
, xc
);
52 DPRINTFR(SyscallVerbose
, "%s: syscall %s returns %d\n",
53 xc
->cpu
->name(), name
, retval
);
55 if (!((flags
& SyscallDesc::SuppressReturnValue
) && retval
== 0))
56 xc
->setSyscallReturn(retval
);
61 unimplementedFunc(SyscallDesc
*desc
, int callnum
, Process
*process
,
64 cerr
<< "Error: syscall " << desc
->name
65 << " (#" << callnum
<< ") unimplemented.";
66 cerr
<< " Args: " << xc
->getSyscallArg(0) << ", " << xc
->getSyscallArg(1)
74 ignoreFunc(SyscallDesc
*desc
, int callnum
, Process
*process
,
77 DCOUT(SyscallWarnings
) << "Warning: ignoring syscall " << desc
->name
78 << "(" << xc
->getSyscallArg(0)
79 << ", " << xc
->getSyscallArg(1)
87 exitFunc(SyscallDesc
*desc
, int callnum
, Process
*process
,
90 new SimExitEvent("syscall caused exit", xc
->getSyscallArg(0) & 0xff);
97 getpagesizeFunc(SyscallDesc
*desc
, int num
, Process
*p
, ExecContext
*xc
)
104 obreakFunc(SyscallDesc
*desc
, int num
, Process
*p
, ExecContext
*xc
)
106 // change brk addr to first arg
107 p
->brk_point
= xc
->getSyscallArg(0);
113 closeFunc(SyscallDesc
*desc
, int num
, Process
*p
, ExecContext
*xc
)
115 int fd
= p
->sim_fd(xc
->getSyscallArg(0));
121 readFunc(SyscallDesc
*desc
, int num
, Process
*p
, ExecContext
*xc
)
123 int fd
= p
->sim_fd(xc
->getSyscallArg(0));
124 int nbytes
= xc
->getSyscallArg(2);
125 BufferArg
bufArg(xc
->getSyscallArg(1), nbytes
);
127 int bytes_read
= read(fd
, bufArg
.bufferPtr(), nbytes
);
129 if (bytes_read
!= -1)
130 bufArg
.copyOut(xc
->mem
);
136 writeFunc(SyscallDesc
*desc
, int num
, Process
*p
, ExecContext
*xc
)
138 int fd
= p
->sim_fd(xc
->getSyscallArg(0));
139 int nbytes
= xc
->getSyscallArg(2);
140 BufferArg
bufArg(xc
->getSyscallArg(1), nbytes
);
142 bufArg
.copyIn(xc
->mem
);
144 int bytes_written
= write(fd
, bufArg
.bufferPtr(), nbytes
);
148 return bytes_written
;
153 lseekFunc(SyscallDesc
*desc
, int num
, Process
*p
, ExecContext
*xc
)
155 int fd
= p
->sim_fd(xc
->getSyscallArg(0));
156 uint64_t offs
= xc
->getSyscallArg(1);
157 int whence
= xc
->getSyscallArg(2);
159 off_t result
= lseek(fd
, offs
, whence
);
161 return (result
== (off_t
)-1) ? -errno
: result
;
166 munmapFunc(SyscallDesc
*desc
, int num
, Process
*p
, ExecContext
*xc
)
168 // given that we don't really implement mmap, munmap is really easy
173 const char *hostname
= "m5.eecs.umich.edu";
176 gethostnameFunc(SyscallDesc
*desc
, int num
, Process
*p
, ExecContext
*xc
)
178 int name_len
= xc
->getSyscallArg(1);
179 BufferArg
name(xc
->getSyscallArg(0), name_len
);
181 strncpy((char *)name
.bufferPtr(), hostname
, name_len
);
183 name
.copyOut(xc
->mem
);