[mips] Initial framework support for MIPS32

src/vm/tick_sampler_posix.cc

 // Copyright (c) 2015, the Dartino 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.md file.
 
 #if defined(DARTINO_TARGET_OS_POSIX)
 
 #include "src/vm/tick_sampler.h"
 
 #include <errno.h>
 #include <stdio.h>
@@ skipping 38 matching lines @@
 #elif defined(DARTINO_TARGET_X64)
   sample->pc = bit_cast<word>(mcontext.gregs[REG_RIP]);
   sample->sp = bit_cast<word>(mcontext.gregs[REG_RSP]);
   sample->fp = bit_cast<word>(mcontext.gregs[REG_RBP]);
   ip = bit_cast<word>(mcontext.gregs[REG_RSI]);
 #elif defined(DARTINO_TARGET_ARM)
   sample->pc = bit_cast<word>(mcontext.arm_pc);
   sample->sp = bit_cast<word>(mcontext.arm_sp);
   sample->fp = bit_cast<word>(mcontext.arm_fp);
   ip = bit_cast<word>(mcontext.arm_r5);
+#elif defined(DARTINO_TARGET_MIPS)
+  sample->pc = (word)mcontext.pc;
+  sample->sp = (word)mcontext.gregs[29];
+  sample->fp = (word)mcontext.gregs[30];
+  ip = (word)mcontext.gregs[17];
 #else
   FATAL("HandleSignal not support on this platform");
 #endif
 #endif
 #if defined(DARTINO_TARGET_OS_MACOS)
 #if defined(DARTINO_TARGET_IA32)
   sample->pc = bit_cast<word>(mcontext->__ss.__eip);
   sample->sp = bit_cast<word>(mcontext->__ss.__esp);
   sample->fp = bit_cast<word>(mcontext->__ss.__ebp);
   ip = bit_cast<word>(mcontext->__ss.__esi);
@@ skipping 157 matching lines @@
   }
 
   processor->Join();
   delete queue;
   delete processor;
 }
 
 }  // namespace dartino
 
 #endif  // DARTINO_TARGET_OS_POSIX