Fix issue 1968, replace usage of inline 'asm' constructs in 'stack alignment', 'jump to exception h…

vm/cpu_x64.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/globals.h"
 
 #if defined(TARGET_ARCH_X64)
 
 #include "vm/cpu.h"
 
 #include "vm/constants_x64.h"
 #include "vm/heap.h"
 #include "vm/isolate.h"
 #include "vm/object.h"
 
 namespace dart {
 
 void CPU::FlushICache(uword start, uword size) {
   // Nothing to be done here.
 }
 
 
-void CPU::JumpToExceptionHandler(uword program_counter,
-                                 uword stack_pointer,
-                                 uword frame_pointer,
-                                 const Instance& exception_object,
-                                 const Instance& stacktrace_object) {
-  // The no_gc StackResource is unwound through the tear down of
-  // stack resources below.
-  NoGCScope no_gc;
-  RawInstance* exception = exception_object.raw();
-  RawInstance* stacktrace = stacktrace_object.raw();
-
-  // Prepare for unwinding frames by destroying all the stack resources
-  // in the previous frames.
-  Isolate* isolate = Isolate::Current();
-  while (isolate->top_resource() != NULL &&
-         (reinterpret_cast<uword>(isolate->top_resource()) < stack_pointer)) {
-    isolate->top_resource()->~StackResource();
-  }
-
-  // Set up the appropriate register state and jump to the handler.
-  ASSERT(kExceptionObjectReg == RAX);
-  ASSERT(kStackTraceObjectReg == RDX);
-#if defined(TARGET_OS_WINDOWS)
-  UNIMPLEMENTED();
-#else
-  asm volatile("mov %[exception], %%rax;"
-               "mov %[stacktrace], %%rdx;"
-               "mov %[pc], %%rbx;"
-               "mov %[fp], %%rcx;"
-               "mov %[sp], %%rdi;"
-               "mov %%rcx, %%rbp;"
-               "mov %%rdi, %%rsp;"
-               "jmp *%%rbx;"
-               :
-               : [exception] "m" (exception),
-                 [stacktrace] "m" (stacktrace),
-                 [pc] "m" (program_counter),
-                 [sp] "m" (stack_pointer),
-                 [fp] "m" (frame_pointer));
-#endif
-  UNREACHABLE();
-}
-
-
-void CPU::JumpToErrorHandler(
-    uword program_counter,
-    uword stack_pointer,
-    uword frame_pointer,
-    const Error& error) {
-  // The no_gc StackResource is unwound through the tear down of
-  // stack resources below.
-  NoGCScope no_gc;
-  ASSERT(!error.IsNull());
-  RawError* raw_error = error.raw();
-
-  // Prepare for unwinding frames by destroying all the stack resources
-  // in the previous frames.
-  Isolate* isolate = Isolate::Current();
-  while (isolate->top_resource() != NULL &&
-         (reinterpret_cast<uword>(isolate->top_resource()) < stack_pointer)) {
-    isolate->top_resource()->~StackResource();
-  }
-
-  // Set up the error object as the return value in RAX and continue
-  // from the invocation stub.
-#if defined(TARGET_OS_WINDOWS)
-  UNIMPLEMENTED();
-#else
-  asm volatile("mov %[raw_error], %%rax;"
-               "mov %[pc], %%rbx;"
-               "mov %[fp], %%rcx;"
-               "mov %[sp], %%rdi;"
-               "mov %%rcx, %%rbp;"
-               "mov %%rdi, %%rsp;"
-               "jmp *%%rbx;"
-               :
-               : [raw_error] "m" (raw_error),
-                 [pc] "m" (program_counter),
-                 [sp] "m" (stack_pointer),
-                 [fp] "m" (frame_pointer));
-#endif
-  UNREACHABLE();
-}
-
-
 const char* CPU::Id() {
   return "x64";
 }
 
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_X64