1/* 2 * Copyright (C) 2013 Intel Corporation. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * 2. 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 * 13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' 14 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 15 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS 17 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 18 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 19 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 20 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 21 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 22 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 23 * THE POSSIBILITY OF SUCH DAMAGE. 24 */ 25 26#ifndef Syscall_h 27#define Syscall_h 28 29#if ENABLE(SECCOMP_FILTERS) 30 31#if CPU(X86_64) 32#define REG_SYSCALL REG_RAX 33#define REG_ARG0 REG_RDI 34#define REG_ARG1 REG_RSI 35#define REG_ARG2 REG_RDX 36#define REG_ARG3 REG_R10 37#elif CPU(X86) 38#define REG_SYSCALL REG_EAX 39#define REG_ARG0 REG_EBX 40#define REG_ARG1 REG_ECX 41#define REG_ARG2 REG_EDX 42#define REG_ARG3 REG_ESI 43#else 44#error "CPU not supported." 45#endif 46 47#include <signal.h> 48#include <sys/types.h> 49#include <wtf/Noncopyable.h> 50#include <wtf/PassOwnPtr.h> 51 52namespace CoreIPC { 53class ArgumentDecoder; 54class ArgumentEncoder; 55} 56 57namespace WebKit { 58 59class SyscallResult; 60class SyscallPolicy; 61 62class Syscall { 63 WTF_MAKE_NONCOPYABLE(Syscall); 64 65public: 66 virtual ~Syscall() { } 67 68 static PassOwnPtr<Syscall> createFromContext(ucontext_t*); 69 static PassOwnPtr<Syscall> createFromDecoder(CoreIPC::ArgumentDecoder*); 70 71 int type() const { return m_type; } 72 73 void setContext(mcontext_t* context) { m_context = context; } 74 mcontext_t* context() const { return m_context; } 75 76 virtual void setResult(const SyscallResult*) = 0; 77 virtual PassOwnPtr<SyscallResult> execute(const SyscallPolicy&) = 0; 78 virtual void encode(CoreIPC::ArgumentEncoder&) const = 0; 79 virtual bool decode(CoreIPC::ArgumentDecoder*) = 0; 80 81protected: 82 Syscall(int type, mcontext_t*); 83 84private: 85 int m_type; 86 mcontext_t* m_context; 87}; 88 89class SyscallResult { 90 WTF_MAKE_NONCOPYABLE(SyscallResult); 91 92public: 93 virtual ~SyscallResult() { } 94 95 static PassOwnPtr<SyscallResult> createFromDecoder(CoreIPC::ArgumentDecoder*, int fd); 96 97 int type() const { return m_type; } 98 99 virtual void encode(CoreIPC::ArgumentEncoder&) const = 0; 100 virtual bool decode(CoreIPC::ArgumentDecoder*, int fd=-1) = 0; 101 102protected: 103 SyscallResult(int type); 104 105private: 106 int m_type; 107}; 108 109} // namespace WebKit 110 111#endif // ENABLE(SECCOMP_FILTERS) 112 113#endif // Syscall_h 114