Use the iOS ABI when running SIMARM on Mac or targeting iOS.

runtime/vm/constants_arm.h

 // 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.
 
 #ifndef VM_CONSTANTS_ARM_H_
 #define VM_CONSTANTS_ARM_H_
 
 #include "platform/globals.h"
 #include "platform/assert.h"
 
@@ skipping 13 matching lines @@
 #error "Exactly one of VFPv3_D16 or VFPv3_D32 can be defined at a time."
 #endif
 
 
 enum Register {
   R0  =  0,
   R1  =  1,
   R2  =  2,
   R3  =  3,
   R4  =  4,
-  R5  =  5,
-  R6  =  6,
-  R7  =  7,
-  R8  =  8,  // THR
-  R9  =  9,  // PP
-  R10 = 10,  // CTX
-  R11 = 11,  // FP
+  R5  =  5,  // PP
+  R6  =  6,  // CTX
+  R7  =  7,  // iOS FP
+  R8  =  8,
+  R9  =  9,
+  R10 = 10,  // THR
+  R11 = 11,  // Linux FP
   R12 = 12,  // IP aka TMP
   R13 = 13,  // SP
   R14 = 14,  // LR
   R15 = 15,  // PC
   kNumberOfCpuRegisters = 16,
   kNoRegister = -1,  // Signals an illegal register.
 
   // Aliases.
-  FP  = R11,
+#if defined(TARGET_OS_MACOS)
+  FP   = R7,
+  NOTFP = R11,
+#else
+  FP   = R11,
+  NOTFP = R7,
+#endif
   IP  = R12,
   SP  = R13,
   LR  = R14,
   PC  = R15,
 };
 
 
 // Values for single-precision floating point registers.
 enum SRegister {
   kNoSRegister = -1,
@@ skipping 194 matching lines @@
 
 
 // List of registers used in load/store multiple.
 typedef uint16_t RegList;
 const RegList kAllCpuRegistersList = 0xFFFF;
 
 
 // C++ ABI call registers.
 const RegList kAbiArgumentCpuRegs =
     (1 << R0) | (1 << R1) | (1 << R2) | (1 << R3);
+#if defined(TARGET_OS_MACOS)
+const RegList kAbiPreservedCpuRegs =
+    (1 << R4)  | (1 << R5) | (1 << R6) | (1 << R8) |
+    (1 << R10) | (1 << R11);
+const int kAbiPreservedCpuRegCount = 6;
+#else
 const RegList kAbiPreservedCpuRegs =
     (1 << R4) | (1 << R5) | (1 << R6) | (1 << R7) |
     (1 << R8) | (1 << R9) | (1 << R10);
 const int kAbiPreservedCpuRegCount = 7;
+#endif
 const QRegister kAbiFirstPreservedFpuReg = Q4;
 const QRegister kAbiLastPreservedFpuReg = Q7;
 const int kAbiPreservedFpuRegCount = 4;
 
 const RegList kReservedCpuRegisters =
     (1 << SPREG) |
     (1 << FPREG) |
     (1 << TMP)   |
     (1 << PP)    |
     (1 << THR)   |
     (1 << PC);
 // CPU registers available to Dart allocator.
 const RegList kDartAvailableCpuRegs =
     kAllCpuRegistersList & ~kReservedCpuRegisters;
 // Registers available to Dart that are not preserved by runtime calls.
 const RegList kDartVolatileCpuRegs =
     kDartAvailableCpuRegs & ~kAbiPreservedCpuRegs;
+#if defined(TARGET_OS_MACOS)
+const int kDartVolatileCpuRegCount = 6;
+#else
 const int kDartVolatileCpuRegCount = 5;
+#endif
 const QRegister kDartFirstVolatileFpuReg = Q0;
 const QRegister kDartLastVolatileFpuReg = Q3;
 const int kDartVolatileFpuRegCount = 4;
 
 
 // Values for the condition field as defined in section A3.2.
 enum Condition {
   kNoCondition = -1,
   EQ =  0,  // equal
   NE =  1,  // not equal
@@ skipping 415 matching lines @@
   static Instr* At(uword pc) { return reinterpret_cast<Instr*>(pc); }
 
  private:
   DISALLOW_ALLOCATION();
   DISALLOW_IMPLICIT_CONSTRUCTORS(Instr);
 };
 
 }  // namespace dart
 
 #endif  // VM_CONSTANTS_ARM_H_