1 // Copyright (c) 2013 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #ifndef SANDBOX_LINUX_SECCOMP_BPF_HELPERS_SIGSYS_HANDLERS_H_ 6 #define SANDBOX_LINUX_SECCOMP_BPF_HELPERS_SIGSYS_HANDLERS_H_ 7 8 #include "base/basictypes.h" 9 #include "build/build_config.h" 10 #include "sandbox/sandbox_export.h" 11 12 // The handlers are suitable for use in Trap() error codes. They are 13 // guaranteed to be async-signal safe. 14 // See sandbox/linux/seccomp-bpf/trap.h to see how they work. 15 16 namespace sandbox { 17 18 struct arch_seccomp_data; 19 20 // This handler will crash the currently running process. The crashing address 21 // will be the number of the current system call, extracted from |args|. 22 // This handler will also print to stderr the number of the crashing syscall. 23 SANDBOX_EXPORT intptr_t 24 CrashSIGSYS_Handler(const struct arch_seccomp_data& args, void* aux); 25 26 // The following three handlers are suitable to report failures with the 27 // clone(), prctl() and ioctl() system calls respectively. 28 29 // The crashing address will be (clone_flags & 0xFFFFFF), where clone_flags is 30 // the clone(2) argument, extracted from |args|. 31 SANDBOX_EXPORT intptr_t 32 SIGSYSCloneFailure(const struct arch_seccomp_data& args, void* aux); 33 // The crashing address will be (option & 0xFFF), where option is the prctl(2) 34 // argument. 35 SANDBOX_EXPORT intptr_t 36 SIGSYSPrctlFailure(const struct arch_seccomp_data& args, void* aux); 37 // The crashing address will be request & 0xFFFF, where request is the ioctl(2) 38 // argument. 39 SANDBOX_EXPORT intptr_t 40 SIGSYSIoctlFailure(const struct arch_seccomp_data& args, void* aux); 41 // The crashing address will be (pid & 0xFFF), where pid is the first 42 // argument (and can be a tid). 43 SANDBOX_EXPORT intptr_t 44 SIGSYSKillFailure(const struct arch_seccomp_data& args, void* aux); 45 // The crashing address will be (op & 0xFFF), where op is the second 46 // argument. 47 SANDBOX_EXPORT intptr_t 48 SIGSYSFutexFailure(const struct arch_seccomp_data& args, void* aux); 49 50 // Following four functions return substrings of error messages used 51 // in the above four functions. They are useful in death tests. 52 SANDBOX_EXPORT const char* GetErrorMessageContentForTests(); 53 SANDBOX_EXPORT const char* GetCloneErrorMessageContentForTests(); 54 SANDBOX_EXPORT const char* GetPrctlErrorMessageContentForTests(); 55 SANDBOX_EXPORT const char* GetIoctlErrorMessageContentForTests(); 56 SANDBOX_EXPORT const char* GetKillErrorMessageContentForTests(); 57 SANDBOX_EXPORT const char* GetFutexErrorMessageContentForTests(); 58 59 } // namespace sandbox. 60 61 #endif // SANDBOX_LINUX_SECCOMP_BPF_HELPERS_SIGSYS_HANDLERS_H_ 62