assembler/MacroAssemblerARMv7.cpp

   1 /*
   2  * Copyright (C) 2013 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 #if USE(MASM_PROBE)
  32 #include <wtf/StdLibExtras.h>
  33 #endif
  34
  35 namespace JSC {
  36
  37 #if USE(MASM_PROBE)
  38
  39 void MacroAssemblerARMv7::ProbeContext::dumpCPURegisters(const char* indentation)
  40 {
  41     #define DUMP_GPREGISTER(_type, _regName) { \
  42         int32_t value = reinterpret_cast<int32_t>(cpu._regName); \
  43         dataLogF("%s    %5s: 0x%08x   %d\n", indentation, #_regName, value, value) ; \
  44     }
  45     FOR_EACH_CPU_GPREGISTER(DUMP_GPREGISTER)
  46     FOR_EACH_CPU_SPECIAL_REGISTER(DUMP_GPREGISTER)
  47     #undef DUMP_GPREGISTER
  48
  49     #define DUMP_FPREGISTER(_type, _regName) { \
  50         uint32_t* u = reinterpret_cast<uint32_t*>(&cpu._regName); \
  51         double* d = reinterpret_cast<double*>(&cpu._regName); \
  52         dataLogF("%s    %5s: 0x %08x %08x   %12g\n", \
  53             indentation, #_regName, u[1], u[0], d[0]); \
  54     }
  55     FOR_EACH_CPU_FPREGISTER(DUMP_FPREGISTER)
  56     #undef DUMP_FPREGISTER
  57 }
  58
  59 void MacroAssemblerARMv7::ProbeContext::dump(const char* indentation)
  60 {
  61     if (!indentation)
  62         indentation = "";
  63
  64     dataLogF("%sProbeContext %p {\n", indentation, this);
  65     dataLogF("%s  probeFunction: %p\n", indentation, probeFunction);
  66     dataLogF("%s  arg1: %p %llu\n", indentation, arg1, reinterpret_cast<int64_t>(arg1));
  67     dataLogF("%s  arg2: %p %llu\n", indentation, arg2, reinterpret_cast<int64_t>(arg2));
  68     dataLogF("%s  cpu: {\n", indentation);
  69
  70     dumpCPURegisters(indentation);
  71
  72     dataLogF("%s  }\n", indentation);
  73     dataLogF("%s}\n", indentation);
  74 }
  75
  76
  77 extern "C" void ctiMasmProbeTrampoline();
  78
  79 // For details on "What code is emitted for the probe?" and "What values are in
  80 // the saved registers?", see comment for MacroAssemblerX86::probe() in
  81 // MacroAssemblerX86_64.h.
  82
  83 void MacroAssemblerARMv7::probe(MacroAssemblerARMv7::ProbeFunction function, void* arg1, void* arg2)
  84 {
  85     push(RegisterID::lr);
  86     push(RegisterID::lr);
  87     add32(TrustedImm32(8), RegisterID::sp, RegisterID::lr);
  88     store32(RegisterID::lr, ArmAddress(RegisterID::sp, 4));
  89     push(RegisterID::ip);
  90     push(RegisterID::r0);
  91     // The following uses RegisterID::ip. So, they must come after we push ip above.
  92     push(trustedImm32FromPtr(arg2));
  93     push(trustedImm32FromPtr(arg1));
  94     push(trustedImm32FromPtr(function));
  95
  96     move(trustedImm32FromPtr(ctiMasmProbeTrampoline), RegisterID::ip);
  97     m_assembler.blx(RegisterID::ip);
  98 }
  99 #endif // USE(MASM_PROBE)
 100
 101 } // namespace JSC
 102
 103 #endif // ENABLE(ASSEMBLER)
 104