assembler/MacroAssemblerARMv7.cpp

   1 /*
   2  * Copyright (C) 2013, 2014 Apple Inc. All rights reserved.
   3  *
   4  * Redistribution and use in source and binary forms, with or without
   5  * modification, are permitted provided that the following conditions
   6  * are met:
   7  * 1. Redistributions of source code must retain the above copyright
   8  *    notice, this list of conditions and the following disclaimer.
   9  * 2. Redistributions in binary form must reproduce the above copyright
  10  *    notice, this list of conditions and the following disclaimer in the
  11  *    documentation and/or other materials provided with the distribution.
  12  *
  13  * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
  14  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  15  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  16  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
  17  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  18  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  19  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  20  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
  21  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  22  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  23  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  24  */
  25
  26 #include "config.h"
  27
  28 #if ENABLE(ASSEMBLER) && CPU(ARM_THUMB2)
  29 #include "MacroAssemblerARMv7.h"
  30
  31 namespace JSC {
  32
  33 #if ENABLE(MASM_PROBE)
  34
  35 #define INDENT printIndent(indentation)
  36
  37 void MacroAssemblerARMv7::printCPURegisters(CPUState& cpu, int indentation)
  38 {
  39     #define PRINT_GPREGISTER(_type, _regName) { \
  40         int32_t value = reinterpret_cast<int32_t>(cpu._regName); \
  41         INDENT, dataLogF("%5s: 0x%08x  %d\n", #_regName, value, value) ; \
  42     }
  43     FOR_EACH_CPU_GPREGISTER(PRINT_GPREGISTER)
  44     FOR_EACH_CPU_SPECIAL_REGISTER(PRINT_GPREGISTER)
  45     #undef PRINT_GPREGISTER
  46
  47     #define PRINT_FPREGISTER(_type, _regName) { \
  48         uint64_t* u = reinterpret_cast<uint64_t*>(&cpu._regName); \
  49         double* d = reinterpret_cast<double*>(&cpu._regName); \
  50         INDENT, dataLogF("%5s: 0x%016llx  %.13g\n", #_regName, *u, *d); \
  51     }
  52     FOR_EACH_CPU_FPREGISTER(PRINT_FPREGISTER)
  53     #undef PRINT_FPREGISTER
  54 }
  55
  56 #undef INDENT
  57
  58 void MacroAssemblerARMv7::printRegister(MacroAssemblerARMv7::CPUState& cpu, RegisterID regID)
  59 {
  60     const char* name = CPUState::registerName(regID);
  61     union {
  62         void* voidPtr;
  63         intptr_t intptrValue;
  64     } u;
  65     u.voidPtr = cpu.registerValue(regID);
  66     dataLogF("%s:<%p %ld>", name, u.voidPtr, u.intptrValue);
  67 }
  68
  69 void MacroAssemblerARMv7::printRegister(MacroAssemblerARMv7::CPUState& cpu, FPRegisterID regID)
  70 {
  71     const char* name = CPUState::registerName(regID);
  72     union {
  73         double doubleValue;
  74         uint64_t uint64Value;
  75     } u;
  76     u.doubleValue = cpu.registerValue(regID);
  77     dataLogF("%s:<0x%016llx %.13g>", name, u.uint64Value, u.doubleValue);
  78 }
  79
  80 extern "C" void ctiMasmProbeTrampoline();
  81
  82 // For details on "What code is emitted for the probe?" and "What values are in
  83 // the saved registers?", see comment for MacroAssemblerX86Common::probe() in
  84 // MacroAssemblerX86Common.cpp.
  85
  86 void MacroAssemblerARMv7::probe(MacroAssemblerARMv7::ProbeFunction function, void* arg1, void* arg2)
  87 {
  88     push(RegisterID::lr);
  89     push(RegisterID::lr);
  90     add32(TrustedImm32(8), RegisterID::sp, RegisterID::lr);
  91     store32(RegisterID::lr, ArmAddress(RegisterID::sp, 4));
  92     push(RegisterID::ip);
  93     push(RegisterID::r0);
  94     // The following uses RegisterID::ip. So, they must come after we push ip above.
  95     push(trustedImm32FromPtr(arg2));
  96     push(trustedImm32FromPtr(arg1));
  97     push(trustedImm32FromPtr(function));
  98
  99     move(trustedImm32FromPtr(ctiMasmProbeTrampoline), RegisterID::ip);
 100     m_assembler.blx(RegisterID::ip);
 101 }
 102 #endif // ENABLE(MASM_PROBE)
 103
 104 } // namespace JSC
 105
 106 #endif // ENABLE(ASSEMBLER)
 107