syscall_emul.hh (10496:0a5a8ecd0ec6) syscall_emul.hh (10497:73a59d5e0923)
1/*
2 * Copyright (c) 2012-2013 ARM Limited
3 * All rights reserved
4 *
5 * The license below extends only to copyright in the software and shall
6 * not be construed as granting a license to any other intellectual
7 * property including but not limited to intellectual property relating
8 * to a hardware implementation of the functionality of the software

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70#include "base/misc.hh"
71#include "base/trace.hh"
72#include "base/types.hh"
73#include "config/the_isa.hh"
74#include "cpu/base.hh"
75#include "cpu/thread_context.hh"
76#include "debug/SyscallVerbose.hh"
77#include "mem/page_table.hh"
1/*
2 * Copyright (c) 2012-2013 ARM Limited
3 * All rights reserved
4 *
5 * The license below extends only to copyright in the software and shall
6 * not be construed as granting a license to any other intellectual
7 * property including but not limited to intellectual property relating
8 * to a hardware implementation of the functionality of the software

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70#include "base/misc.hh"
71#include "base/trace.hh"
72#include "base/types.hh"
73#include "config/the_isa.hh"
74#include "cpu/base.hh"
75#include "cpu/thread_context.hh"
76#include "debug/SyscallVerbose.hh"
77#include "mem/page_table.hh"
78#include "mem/se_translating_port_proxy.hh"
79#include "sim/byteswap.hh"
80#include "sim/emul_driver.hh"
81#include "sim/process.hh"
78#include "sim/byteswap.hh"
79#include "sim/emul_driver.hh"
80#include "sim/process.hh"
81#include "sim/syscall_emul_buf.hh"
82#include "sim/syscallreturn.hh"
83#include "sim/system.hh"
84
85///
86/// System call descriptor.
87///
88class SyscallDesc {
89

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112 {
113 }
114
115 /// Emulate the syscall. Public interface for calling through funcPtr.
116 void doSyscall(int callnum, LiveProcess *proc, ThreadContext *tc);
117};
118
119
82#include "sim/syscallreturn.hh"
83#include "sim/system.hh"
84
85///
86/// System call descriptor.
87///
88class SyscallDesc {
89

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112 {
113 }
114
115 /// Emulate the syscall. Public interface for calling through funcPtr.
116 void doSyscall(int callnum, LiveProcess *proc, ThreadContext *tc);
117};
118
119
120class BaseBufferArg {
121
122 public:
123
124 BaseBufferArg(Addr _addr, int _size) : addr(_addr), size(_size)
125 {
126 bufPtr = new uint8_t[size];
127 // clear out buffer: in case we only partially populate this,
128 // and then do a copyOut(), we want to make sure we don't
129 // introduce any random junk into the simulated address space
130 memset(bufPtr, 0, size);
131 }
132
133 virtual ~BaseBufferArg() { delete [] bufPtr; }
134
135 //
136 // copy data into simulator space (read from target memory)
137 //
138 virtual bool copyIn(SETranslatingPortProxy &memproxy)
139 {
140 memproxy.readBlob(addr, bufPtr, size);
141 return true; // no EFAULT detection for now
142 }
143
144 //
145 // copy data out of simulator space (write to target memory)
146 //
147 virtual bool copyOut(SETranslatingPortProxy &memproxy)
148 {
149 memproxy.writeBlob(addr, bufPtr, size);
150 return true; // no EFAULT detection for now
151 }
152
153 protected:
154 Addr addr;
155 int size;
156 uint8_t *bufPtr;
157};
158
159
160class BufferArg : public BaseBufferArg
161{
162 public:
163 BufferArg(Addr _addr, int _size) : BaseBufferArg(_addr, _size) { }
164 void *bufferPtr() { return bufPtr; }
165};
166
167template <class T>
168class TypedBufferArg : public BaseBufferArg
169{
170 public:
171 // user can optionally specify a specific number of bytes to
172 // allocate to deal with those structs that have variable-size
173 // arrays at the end
174 TypedBufferArg(Addr _addr, int _size = sizeof(T))
175 : BaseBufferArg(_addr, _size)
176 { }
177
178 // type case
179 operator T*() { return (T *)bufPtr; }
180
181 // dereference operators
182 T &operator*() { return *((T *)bufPtr); }
183 T* operator->() { return (T *)bufPtr; }
184 T &operator[](int i) { return ((T *)bufPtr)[i]; }
185};
186
187//////////////////////////////////////////////////////////////////////
188//
189// The following emulation functions are generic enough that they
190// don't need to be recompiled for different emulated OS's. They are
191// defined in sim/syscall_emul.cc.
192//
193//////////////////////////////////////////////////////////////////////
194

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121//
122// The following emulation functions are generic enough that they
123// don't need to be recompiled for different emulated OS's. They are
124// defined in sim/syscall_emul.cc.
125//
126//////////////////////////////////////////////////////////////////////
127

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