signal_handler_macos.cc

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// Copyright (c) 2013, 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/globals.h"
#include "vm/instructions.h"
#include "vm/signal_handler.h"
#include "vm/simulator.h"
#if defined(DART_HOST_OS_MACOS)
 
namespace dart {
 
uintptr_t SignalHandler::GetProgramCounter(const mcontext_t& mcontext) {
  uintptr_t pc = 0;
 
#if defined(HOST_ARCH_IA32)
  pc = static_cast<uintptr_t>(mcontext->__ss.__eip);
#elif defined(HOST_ARCH_X64)
  pc = static_cast<uintptr_t>(mcontext->__ss.__rip);
#elif defined(HOST_ARCH_ARM)
  pc = static_cast<uintptr_t>(mcontext->__ss.__pc);
#elif defined(HOST_ARCH_ARM64)
  pc = static_cast<uintptr_t>(mcontext->__ss.__pc);
#else
#error Unsupported architecture.
#endif  // HOST_ARCH_...
 
  return pc;
}
 
uintptr_t SignalHandler::GetFramePointer(const mcontext_t& mcontext) {
  uintptr_t fp = 0;
 
#if defined(HOST_ARCH_IA32)
  fp = static_cast<uintptr_t>(mcontext->__ss.__ebp);
#elif defined(HOST_ARCH_X64)
  fp = static_cast<uintptr_t>(mcontext->__ss.__rbp);
#elif defined(HOST_ARCH_ARM)
  fp = static_cast<uintptr_t>(mcontext->__ss.__r[7]);
#elif defined(HOST_ARCH_ARM64)
  fp = static_cast<uintptr_t>(mcontext->__ss.__fp);
#else
#error Unsupported architecture.
#endif  // HOST_ARCH_...
 
  return fp;
}
 
uintptr_t SignalHandler::GetCStackPointer(const mcontext_t& mcontext) {
  uintptr_t sp = 0;
 
#if defined(HOST_ARCH_IA32)
  sp = static_cast<uintptr_t>(mcontext->__ss.__esp);
#elif defined(HOST_ARCH_X64)
  sp = static_cast<uintptr_t>(mcontext->__ss.__rsp);
#elif defined(HOST_ARCH_ARM)
  sp = static_cast<uintptr_t>(mcontext->__ss.__sp);
#elif defined(HOST_ARCH_ARM64)
  sp = static_cast<uintptr_t>(mcontext->__ss.__sp);
#else
  UNIMPLEMENTED();
#endif  // HOST_ARCH_...
 
  return sp;
}
 
uintptr_t SignalHandler::GetDartStackPointer(const mcontext_t& mcontext) {
#if defined(TARGET_ARCH_ARM64) && !defined(USING_SIMULATOR)
  return static_cast<uintptr_t>(mcontext->__ss.__x[SPREG]);
#else
  return GetCStackPointer(mcontext);
#endif
}
 
uintptr_t SignalHandler::GetLinkRegister(const mcontext_t& mcontext) {
  uintptr_t lr = 0;
 
#if defined(HOST_ARCH_IA32)
  lr = 0;
#elif defined(HOST_ARCH_X64)
  lr = 0;
#elif defined(HOST_ARCH_ARM)
  lr = static_cast<uintptr_t>(mcontext->__ss.__lr);
#elif defined(HOST_ARCH_ARM64)
  lr = static_cast<uintptr_t>(mcontext->__ss.__lr);
#else
#error Unsupported architecture.
#endif  // HOST_ARCH_...
 
  return lr;
}
 
void SignalHandler::Install(SignalAction action) {
  // Nothing to do on MacOS.
}
 
void SignalHandler::Remove() {
  // Nothing to do on MacOS.
}
 
}  // namespace dart
 
#endif  // defined(DART_HOST_OS_MACOS)