process.cc revision 13988 
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/linux/process.hh"
34
35#include "arch/sparc/isa_traits.hh"
36#include "arch/sparc/registers.hh"
37#include "base/loader/object_file.hh"
38#include "base/trace.hh"
39#include "cpu/thread_context.hh"
40#include "kern/linux/linux.hh"
41#include "sim/process.hh"
42#include "sim/syscall_desc.hh"
43#include "sim/syscall_emul.hh"
44
45using namespace std;
46using namespace SparcISA;
47
48namespace
49{
50
51class SparcLinuxObjectFileLoader : public ObjectFile::Loader
52{
53  public:
54    Process *
55    load(ProcessParams *params, ObjectFile *obj_file) override
56    {
57        auto arch = obj_file->getArch();
58        auto opsys = obj_file->getOpSys();
59
60        if (arch != ObjectFile::SPARC64 && arch != ObjectFile::SPARC32)
61            return nullptr;
62
63        if (opsys == ObjectFile::UnknownOpSys) {
64            warn("Unknown operating system; assuming Linux.");
65            opsys = ObjectFile::Linux;
66        }
67
68        if (opsys != ObjectFile::Linux)
69            return nullptr;
70
71        if (arch == ObjectFile::SPARC64)
72            return new Sparc64LinuxProcess(params, obj_file);
73        else
74            return new Sparc32LinuxProcess(params, obj_file);
75    }
76};
77
78SparcLinuxObjectFileLoader loader;
79
80} // anonymous namespace
81
82SyscallDesc*
83SparcLinuxProcess::getDesc(int callnum)
84{
85    if (callnum < 0 || callnum >= Num_Syscall_Descs)
86        return NULL;
87    return &syscallDescs[callnum];
88}
89
90SyscallDesc*
91SparcLinuxProcess::getDesc32(int callnum)
92{
93    if (callnum < 0 || callnum >= Num_Syscall32_Descs)
94        return NULL;
95    return &syscall32Descs[callnum];
96}
97
98Sparc32LinuxProcess::Sparc32LinuxProcess(ProcessParams * params,
99                                         ObjectFile *objFile)
100    : Sparc32Process(params, objFile)
101{}
102
103void Sparc32LinuxProcess::handleTrap(int trapNum, ThreadContext *tc,
104                                     Fault *fault)
105{
106    switch (trapNum) {
107      case 0x10: //Linux 32 bit syscall trap
108        tc->syscall(tc->readIntReg(1), fault);
109        break;
110      default:
111        SparcProcess::handleTrap(trapNum, tc, fault);
112    }
113}
114
115Sparc64LinuxProcess::Sparc64LinuxProcess(ProcessParams * params,
116                                         ObjectFile *objFile)
117    : Sparc64Process(params, objFile)
118{}
119
120void Sparc64LinuxProcess::handleTrap(int trapNum, ThreadContext *tc,
121                                     Fault *fault)
122{
123    switch (trapNum) {
124      // case 0x10: // Linux 32 bit syscall trap
125      case 0x6d: // Linux 64 bit syscall trap
126        tc->syscall(tc->readIntReg(1), fault);
127        break;
128      default:
129        SparcProcess::handleTrap(trapNum, tc, fault);
130    }
131}
132