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.
5 #ifndef SANDBOX_LINUX_SECCOMP_BPF_HELPERS_SIGSYS_HANDLERS_H_
6 #define SANDBOX_LINUX_SECCOMP_BPF_HELPERS_SIGSYS_HANDLERS_H_
8 #include "base/basictypes.h"
9 #include "build/build_config.h"
10 #include "sandbox/linux/sandbox_export.h"
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.
18 struct arch_seccomp_data;
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);
26 // The following three handlers are suitable to report failures with the
27 // clone(), prctl() and ioctl() system calls respectively.
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)
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)
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 intptr_t SIGSYSKillFailure(const struct arch_seccomp_data& args, void* aux);
45 // Following four functions return substrings of error messages used
46 // in the above four functions. They are useful in death tests.
47 SANDBOX_EXPORT const char* GetErrorMessageContentForTests();
48 SANDBOX_EXPORT const char* GetCloneErrorMessageContentForTests();
49 SANDBOX_EXPORT const char* GetPrctlErrorMessageContentForTests();
50 SANDBOX_EXPORT const char* GetIoctlErrorMessageContentForTests();
52 } // namespace sandbox.
54 #endif // SANDBOX_LINUX_SECCOMP_BPF_HELPERS_SIGSYS_HANDLERS_H_