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#include "config.h" 27#include "Syscall.h" 28 29#if ENABLE(SECCOMP_FILTERS) 30 31#include "ArgumentCoders.h" 32#include "OpenSyscall.h" 33#include "SigactionSyscall.h" 34#include "SigprocmaskSyscall.h" 35#include <seccomp.h> 36 37namespace WebKit { 38 39std::unique_ptr<Syscall> Syscall::createFromContext(ucontext_t* ucontext) 40{ 41 mcontext_t* mcontext = &ucontext->uc_mcontext; 42 43 switch (mcontext->gregs[REG_SYSCALL]) { 44 case __NR_open: 45 return std::make_unique<OpenSyscall>(mcontext); 46 case __NR_openat: 47 return OpenSyscall::createFromOpenatContext(mcontext); 48 case __NR_creat: 49 return OpenSyscall::createFromCreatContext(mcontext); 50 case __NR_sigprocmask: 51 case __NR_rt_sigprocmask: 52 return SigprocmaskSyscall::createFromContext(ucontext); 53 case __NR_sigaction: 54 case __NR_rt_sigaction: 55 return SigactionSyscall::createFromContext(mcontext); 56 default: 57 CRASH(); 58 } 59 60 return nullptr; 61} 62 63std::unique_ptr<Syscall> Syscall::createFromDecoder(IPC::ArgumentDecoder* decoder) 64{ 65 int type; 66 if (!decoder->decode(type)) 67 return nullptr; 68 69 std::unique_ptr<Syscall> syscall; 70 if (type == __NR_open) 71 syscall = std::make_unique<OpenSyscall>(nullptr); 72 73 if (!syscall->decode(decoder)) 74 return nullptr; 75 76 return syscall; 77} 78 79Syscall::Syscall(int type, mcontext_t* context) 80 : m_type(type) 81 , m_context(context) 82{ 83} 84 85std::unique_ptr<SyscallResult> SyscallResult::createFromDecoder(IPC::ArgumentDecoder* decoder, int fd) 86{ 87 int type; 88 if (!decoder->decode(type)) 89 return nullptr; 90 91 std::unique_ptr<SyscallResult> result; 92 if (type == __NR_open) 93 result = std::make_unique<OpenSyscallResult>(-1, 0); 94 95 if (!result->decode(decoder, fd)) 96 return nullptr; 97 98 return result; 99} 100 101SyscallResult::SyscallResult(int type) 102 : m_type(type) 103{ 104} 105 106} // namespace WebKit 107 108#endif // ENABLE(SECCOMP_FILTERS) 109