DWARF and unwind support for AOT assembly output.

runtime/vm/assembler_arm.cc

 // 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"  // NOLINT
 #if defined(TARGET_ARCH_ARM)
 
 #include "vm/assembler.h"
 #include "vm/cpu.h"
 #include "vm/longjump.h"
@@ skipping 3172 matching lines @@
 
 void Assembler::EnterFrame(RegList regs, intptr_t frame_size) {
   if (prologue_offset_ == -1) {
     prologue_offset_ = CodeSize();
   }
   PushList(regs);
   if ((regs & (1 << FP)) != 0) {
     // Set FP to the saved previous FP.
     add(FP, SP, Operand(4 * NumRegsBelowFP(regs)));
   }
-  AddImmediate(SP, -frame_size);
+  if (frame_size != 0) {
+    AddImmediate(SP, -frame_size);
+  }
 }
 
 
 void Assembler::LeaveFrame(RegList regs) {
   ASSERT((regs & (1 << PC)) == 0);  // Must not pop PC.
   if ((regs & (1 << FP)) != 0) {
     // Use FP to set SP.
     sub(SP, FP, Operand(4 * NumRegsBelowFP(regs)));
   }
   PopList(regs);
@@ skipping 524 matching lines @@
 
 
 const char* Assembler::FpuRegisterName(FpuRegister reg) {
   ASSERT((0 <= reg) && (reg < kNumberOfFpuRegisters));
   return fpu_reg_names[reg];
 }
 
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_ARM