1/*
2 * Copyright (c) 2012-2013 ARM Limited
3 * Copyright (c) 2015 Advanced Micro Devices, Inc.
4 * All rights reserved
5 *
6 * The license below extends only to copyright in the software and shall
7 * not be construed as granting a license to any other intellectual
8 * property including but not limited to intellectual property relating

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92
93 /// Typedef for target syscall handler functions.
94 typedef SyscallReturn (*FuncPtr)(SyscallDesc *, int num,
95 LiveProcess *, ThreadContext *);
96
97 const char *name; //!< Syscall name (e.g., "open").
98 FuncPtr funcPtr; //!< Pointer to emulation function.
99 int flags; //!< Flags (see Flags enum).
100 bool warned; //!< Have we warned about unimplemented syscall?
101
102 /// Flag values for controlling syscall behavior.
103 enum Flags {
104 /// Don't set return regs according to funcPtr return value.
105 /// Used for syscalls with non-standard return conventions
106 /// that explicitly set the ThreadContext regs (e.g.,
107 /// sigreturn).
108 SuppressReturnValue = 1,
109 WarnOnce = 2
110 };
111
112 /// Constructor.
113 SyscallDesc(const char *_name, FuncPtr _funcPtr, int _flags = 0)
114 : name(_name), funcPtr(_funcPtr), flags(_flags), warned(false)
115 {
116 }
117
118 /// Emulate the syscall. Public interface for calling through funcPtr.
119 void doSyscall(int callnum, LiveProcess *proc, ThreadContext *tc);
120
121 /// Is the WarnOnce flag set?
122 bool warnOnce() const { return (flags & WarnOnce); }
123};
124
125
126//////////////////////////////////////////////////////////////////////
127//
128// The following emulation functions are generic enough that they
129// don't need to be recompiled for different emulated OS's. They are
130// defined in sim/syscall_emul.cc.

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137 LiveProcess *p, ThreadContext *tc);
138
139/// Handler for unimplemented syscalls that we never intend to
140/// implement (signal handling, etc.) and should not affect the correct
141/// behavior of the program. Print a warning only if the appropriate
142/// trace flag is enabled. Return success to the target program.
143SyscallReturn ignoreFunc(SyscallDesc *desc, int num,
144 LiveProcess *p, ThreadContext *tc);
145
146/// Target exit() handler: terminate current context.
147SyscallReturn exitFunc(SyscallDesc *desc, int num,
148 LiveProcess *p, ThreadContext *tc);
149
150/// Target exit_group() handler: terminate simulation. (exit all threads)
151SyscallReturn exitGroupFunc(SyscallDesc *desc, int num,
152 LiveProcess *p, ThreadContext *tc);

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