Support debugger API on ARM.

runtime/vm/debugger_ia32.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_IA32)
 
 #include "vm/debugger.h"
 
 #include "vm/code_patcher.h"
@@ skipping 28 matching lines @@
   uint8_t* code = reinterpret_cast<uint8_t*>(pc_ - 5);
   ASSERT((code[0] == 0x89) && (code[1] == 0xEC));  // mov esp,ebp
   ASSERT(code[2] == 0x5D);  // pop ebp
   ASSERT(code[3] == 0xC3);  // ret
   ASSERT(code[4] == 0x90);  // nop
 
   // Smash code with call instruction and relative target address.
   uword stub_addr = StubCode::BreakpointReturnEntryPoint();
   code[0] = 0xE8;
   *reinterpret_cast<uword*>(&code[1]) = stub_addr - pc_;
-  CPU::FlushICache(pc_, 5);
+  CPU::FlushICache(pc_ - 5, 5);
 }
 
 
 void CodeBreakpoint::RestoreFunctionReturn() {
   uint8_t* code = reinterpret_cast<uint8_t*>(pc_ - 5);
   ASSERT(code[0] == 0xE8);
   code[0] = 0x89;
   code[1] = 0xEC;  // mov esp,ebp
   code[2] = 0x5D;  // pop ebp
   code[3] = 0xC3;  // ret
   code[4] = 0x90;  // nop
-  CPU::FlushICache(pc_, 5);
+  CPU::FlushICache(pc_ - 5, 5);
 }
 
 
 
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_IA32