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
35namespace JSC {
36
37#if USE(MASM_PROBE)
38
39void 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
59void 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
77extern "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
83void 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
105