process.cc revision 5981 
1/*
2 * Copyright (c) 2003-2005 The Regents of The University of Michigan
3 * All rights reserved.
4 *
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.
15 *
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
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 *
28 * Authors: Steve Reinhardt
29 *          Gabe Black
30 *          Ali Saidi
31 */
32
33#include "arch/sparc/isa_traits.hh"
34#include "arch/sparc/linux/process.hh"
35#include "arch/sparc/regfile.hh"
36
37#include "base/trace.hh"
38#include "cpu/thread_context.hh"
39#include "kern/linux/linux.hh"
40
41#include "sim/process.hh"
42#include "sim/syscall_emul.hh"
43
44using namespace std;
45using namespace SparcISA;
46
47SyscallDesc*
48SparcLinuxProcess::getDesc(int callnum)
49{
50    if (callnum < 0 || callnum >= Num_Syscall_Descs)
51        return NULL;
52    return &syscallDescs[callnum];
53}
54
55SyscallDesc*
56SparcLinuxProcess::getDesc32(int callnum)
57{
58    if (callnum < 0 || callnum >= Num_Syscall32_Descs)
59        return NULL;
60    return &syscall32Descs[callnum];
61}
62
63SparcLinuxProcess::SparcLinuxProcess() :
64    Num_Syscall_Descs(284), //sizeof(syscallDescs) / sizeof(SyscallDesc)),
65    Num_Syscall32_Descs(299) //sizeof(syscall32Descs) / sizeof(SyscallDesc))
66{
67    // The sparc syscall table must be <= 284 entries because that is all there
68    // is space for.
69    assert(Num_Syscall_Descs <= 284);
70    // The sparc 32 bit syscall table bust be <= 299 entries because that is
71    // all there is space for.
72    assert(Num_Syscall_Descs <= 299);
73}
74
75Sparc32LinuxProcess::Sparc32LinuxProcess(LiveProcessParams * params,
76                                         ObjectFile *objFile)
77    : Sparc32LiveProcess(params, objFile)
78{}
79
80void Sparc32LinuxProcess::handleTrap(int trapNum, ThreadContext *tc)
81{
82    switch(trapNum)
83    {
84      case 0x10: //Linux 32 bit syscall trap
85        tc->syscall(tc->readIntReg(1));
86        break;
87      default:
88        SparcLiveProcess::handleTrap(trapNum, tc);
89    }
90}
91
92Sparc64LinuxProcess::Sparc64LinuxProcess(LiveProcessParams * params,
93                                         ObjectFile *objFile)
94    : Sparc64LiveProcess(params, objFile)
95{}
96
97void Sparc64LinuxProcess::handleTrap(int trapNum, ThreadContext *tc)
98{
99    switch(trapNum)
100    {
101      //case 0x10: //Linux 32 bit syscall trap
102      case 0x6d: //Linux 64 bit syscall trap
103        tc->syscall(tc->readIntReg(1));
104        break;
105      default:
106        SparcLiveProcess::handleTrap(trapNum, tc);
107    }
108}
109