Added support for sigreturn() and rt_sigreturn(). On x86-32, this is...

sandbox/linux/seccomp/sandbox_impl.h

 // Copyright (c) 2010 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef SANDBOX_IMPL_H__
 #define SANDBOX_IMPL_H__
 
 #include <asm/ldt.h>
 #include <errno.h>
 #include <fcntl.h>
@@ skipping 580 matching lines @@
   // Thread local data available from each sandboxed thread.
   enum { TLS_COOKIE, TLS_TID, TLS_THREAD_FD };
   static long long cookie() { return TLS::getTLSValue<long long>(TLS_COOKIE); }
   static int tid()          { return TLS::getTLSValue<int>(TLS_TID); }
   static int threadFdPub()  { return TLS::getTLSValue<int>(TLS_THREAD_FD); }
   static int processFdPub() { return processFdPub_; }
   static kernel_sigset_t* signalMask() { return &getSecureMem()->signalMask; }
 
   // The SEGV handler knows how to handle RDTSC instructions
   static void setupSignalHandlers();
-  static void (*segv())(int signo);
+  static void (*segv())(int signo, SysCalls::siginfo *context, void *unused);
 
   // If no specific handler has been registered for a system call, call this
   // function which asks the trusted thread to perform the call. This is used
   // for system calls that are not restricted.
   static void* defaultSystemCallHandler(int syscallNum, void* arg0,
                                         void* arg1, void* arg2, void* arg3,
                                         void* arg4, void* arg5)
                                     asm("playground$defaultSystemCallHandler")
   #if defined(__x86_64__)
                                     __attribute__((visibility("internal")))
@@ skipping 58 matching lines @@
   static ProtectedMap                  protectedMap_;
   static std::vector<SecureMem::Args*> secureMemPool_;
 };
 
 } // namespace
 
 using playground::Sandbox;
 #endif // __cplusplus
 
 #endif // SANDBOX_IMPL_H__