Support for MIPS in architecture independent files....

src/platform-linux.cc

 // Copyright 2006-2008 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 72 matching lines @@
   srandom(static_cast<unsigned int>(seed));
 }
 
 
 double OS::nan_value() {
   return NAN;
 }
 
 
 int OS::ActivationFrameAlignment() {
-#ifdef V8_TARGET_ARCH_ARM
+#ifdef V8_TARGET_ARCH_ARM 
   // On EABI ARM targets this is required for fp correctness in the
   // runtime system.
   return 8;
 #else
+  #ifdef V8_TARGET_ARCH_MIPS 

[Søren Thygesen Gjesse, 2010/01/19 22:59:12]

Combine with #else above to #elif.

[Alexandre, 2010/01/22 23:08:42]

Fixed
On 2010/01/19 22:59:12, Søren Gjesse wrote:

+  return 8;
+  #endif
   // With gcc 4.4 the tree vectorization optimiser can generate code
   // that requires 16 byte alignment such as movdqa on x86.
   return 16;
 #endif
 }
 
 
 // We keep the lowest and highest addresses mapped as a quick way of
 // determining that pointers are outside the heap (used mostly in assertions
 // and verification).  The estimate is conservative, ie, not all addresses in
@@ skipping 72 matching lines @@
   // Redirect to std abort to signal abnormal program termination.
   abort();
 }
 
 
 void OS::DebugBreak() {
 // TODO(lrn): Introduce processor define for runtime system (!= V8_ARCH_x,
 //  which is the architecture of generated code).
 #if defined(__arm__) || defined(__thumb__)
   asm("bkpt 0");
+#elif defined(__mips__)
+  // The code field of the break instruction is available for use as software parameters.
+  asm("break");
 #else
   asm("int $3");
 #endif
 }
 
 
 class PosixMemoryMappedFile : public OS::MemoryMappedFile {
  public:
   PosixMemoryMappedFile(FILE* file, void* memory, int size)
     : file_(file), memory_(memory), size_(size) { }
@@ skipping 429 matching lines @@
   // we check Top's data. Having that ThreadManager::RestoreThread first
   // restores ThreadLocalTop from TLS, and only then erases the TLS value,
   // reading Top::thread_id() should not be affected by races.
   if (ThreadManager::HasId() && !ThreadManager::IsArchived() &&
       ThreadManager::CurrentId() == Top::thread_id()) {
     return true;
   }
   return false;
 }
 
-
 static void ProfilerSignalHandler(int signal, siginfo_t* info, void* context) {
+#ifndef V8_HOST_ARCH_MIPS
   USE(info);
   if (signal != SIGPROF) return;
   if (active_sampler_ == NULL) return;
 
   TickSample sample;
 
   // If profiling, we extract the current pc and sp.
   if (active_sampler_->IsProfiling()) {
     // Extracting the sample from the context is extremely machine dependent.
     ucontext_t* ucontext = reinterpret_cast<ucontext_t*>(context);
@@ skipping 10 matching lines @@
 // An undefined macro evaluates to 0, so this applies to Android's Bionic also.
 #if (__GLIBC__ < 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ <= 3))
     sample.pc = mcontext.gregs[R15];
     sample.sp = mcontext.gregs[R13];
     sample.fp = mcontext.gregs[R11];
 #else
     sample.pc = mcontext.arm_pc;
     sample.sp = mcontext.arm_sp;
     sample.fp = mcontext.arm_fp;
 #endif
+#elif V8_HOST_ARCH_MIPS
+// TODO Implement this on MIPS. 
 #endif
     if (IsVmThread())
       active_sampler_->SampleStack(&sample);
   }
 
   // We always sample the VM state.
   sample.state = Logger::state();
 
   active_sampler_->Tick(&sample);
+#endif
 }
 
 
 class Sampler::PlatformData : public Malloced {
  public:
   PlatformData() {
     signal_handler_installed_ = false;
   }
 
   bool signal_handler_installed_;
@@ skipping 52 matching lines @@
 
   // This sampler is no longer the active sampler.
   active_sampler_ = NULL;
   active_ = false;
 }
 
 
 #endif  // ENABLE_LOGGING_AND_PROFILING
 
 } }  // namespace v8::internal