Support debugger API on ARM.

runtime/vm/debugger_x64.cc

 // Copyright (c) 2011, 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/debugger.h"
 
 #include "vm/cpu.h"
@@ skipping 31 matching lines @@
          (code[9] == 0x90) && (code[10] == 0x90) &&
          (code[11] == 0x90) && (code[12] == 0x90));
          // Smash code with call instruction and relative target address.
   uword stub_addr = StubCode::BreakpointReturnEntryPoint();
   code[0] = 0x49;
   code[1] = 0xbb;
   *reinterpret_cast<uword*>(&code[2]) = stub_addr;
   code[10] = 0x41;
   code[11] = 0xff;
   code[12] = 0xd3;
-  CPU::FlushICache(pc_, 5);
+  CPU::FlushICache(pc_ - 13, 13);
 }
 
 
 void CodeBreakpoint::RestoreFunctionReturn() {
   uint8_t* code = reinterpret_cast<uint8_t*>(pc_ - 13);
   ASSERT((code[0] == 0x49) && (code[1] == 0xbb));
   code[0] = 0x48;  // movq %rbp,%rsp
   code[1] = 0x89;
   code[2] = 0xec;
   code[3] = 0x5d;  // popq %rbp
   code[4] = 0xc3;  // ret
   code[5] = 0x90;  // nop
   code[6] = 0x90;  // nop
   code[7] = 0x90;  // nop
   code[8] = 0x90;  // nop
   code[9] = 0x90;  // nop
   code[10] = 0x90;  // nop
   code[11] = 0x90;  // nop
   code[12] = 0x90;  // nop
-  CPU::FlushICache(pc_, 5);
+  CPU::FlushICache(pc_ - 13, 13);
 }
 
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_X64