Initial revision of ARM simulator and (empty) MIPS simulator.

runtime/vm/os_linux.cc

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/os.h"
 
 #include <errno.h>
 #include <limits.h>
 #include <malloc.h>
 #include <time.h>
@@ skipping 292 matching lines @@
   return sysconf(_SC_NPROCESSORS_ONLN);
 }
 
 
 void OS::Sleep(int64_t millis) {
   // TODO(5411554):  For now just use usleep we may have to revisit this.
   usleep(millis * 1000);
 }
 
 
+void OS::DebugBreak() {
+#if defined(HOST_ARCH_X64) || defined(HOST_ARCH_IA32)
+  asm("int $3");
+#elif defined(HOST_ARCH_ARM)
+  asm("svc #0x9f0001");  // __ARM_NR_breakpoint
+#elif defined(HOST_ARCH_MIPS)
+  UNIMPLEMENTED();
+#else
+#error Unsupported architecture.
+#endif
+}
+
+
 void OS::Print(const char* format, ...) {
   va_list args;
   va_start(args, format);
   VFPrint(stdout, format, args);
   va_end(args);
 }
 
 
 void OS::VFPrint(FILE* stream, const char* format, va_list args) {
   vfprintf(stream, format, args);
@@ skipping 79 matching lines @@
 void OS::Abort() {
   abort();
 }
 
 
 void OS::Exit(int code) {
   exit(code);
 }
 
 }  // namespace dart