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/*
* Copyright (C) 2008, 2009, 2013 Apple Inc. All rights reserved.
* Copyright (C) 2008 Cameron Zwarich <cwzwarich@uwaterloo.ca>
* Copyright (C) Research In Motion Limited 2010, 2011. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of Apple Computer, Inc. ("Apple") nor the names of
* its contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef JITStubsX86_h
#define JITStubsX86_h
#include "JITStubsX86Common.h"
#if !CPU(X86)
#error "JITStubsX86.h should only be #included if CPU(X86)"
#endif
#if !USE(JSVALUE32_64)
#error "JITStubsX86.h only implements USE(JSVALUE32_64)"
#endif
namespace JSC {
#if COMPILER(GCC)
#if USE(MASM_PROBE)
asm (
".globl " SYMBOL_STRING(ctiMasmProbeTrampoline) "\n"
HIDE_SYMBOL(ctiMasmProbeTrampoline) "\n"
SYMBOL_STRING(ctiMasmProbeTrampoline) ":" "\n"
"pushfd" "\n"
// MacroAssembler::probe() has already generated code to store some values.
// Together with the eflags pushed above, the top of stack now looks like
// this:
// esp[0 * ptrSize]: eflags
// esp[1 * ptrSize]: return address / saved eip
// esp[2 * ptrSize]: probeFunction
// esp[3 * ptrSize]: arg1
// esp[4 * ptrSize]: arg2
// esp[5 * ptrSize]: saved eax
// esp[6 * ptrSize]: saved esp
"movl %esp, %eax" "\n"
"subl $" STRINGIZE_VALUE_OF(PROBE_SIZE) ", %esp" "\n"
// The X86_64 ABI specifies that the worse case stack alignment requirement
// is 32 bytes.
"andl $~0x1f, %esp" "\n"
"movl %ebp, " STRINGIZE_VALUE_OF(PROBE_CPU_EBP_OFFSET) "(%esp)" "\n"
"movl %esp, %ebp" "\n" // Save the ProbeContext*.
"movl %ecx, " STRINGIZE_VALUE_OF(PROBE_CPU_ECX_OFFSET) "(%ebp)" "\n"
"movl %edx, " STRINGIZE_VALUE_OF(PROBE_CPU_EDX_OFFSET) "(%ebp)" "\n"
"movl %ebx, " STRINGIZE_VALUE_OF(PROBE_CPU_EBX_OFFSET) "(%ebp)" "\n"
"movl %esi, " STRINGIZE_VALUE_OF(PROBE_CPU_ESI_OFFSET) "(%ebp)" "\n"
"movl %edi, " STRINGIZE_VALUE_OF(PROBE_CPU_EDI_OFFSET) "(%ebp)" "\n"
"movl 0 * " STRINGIZE_VALUE_OF(PTR_SIZE) "(%eax), %ecx" "\n"
"movl %ecx, " STRINGIZE_VALUE_OF(PROBE_CPU_EFLAGS_OFFSET) "(%ebp)" "\n"
"movl 1 * " STRINGIZE_VALUE_OF(PTR_SIZE) "(%eax), %ecx" "\n"
"movl %ecx, " STRINGIZE_VALUE_OF(PROBE_CPU_EIP_OFFSET) "(%ebp)" "\n"
"movl 2 * " STRINGIZE_VALUE_OF(PTR_SIZE) "(%eax), %ecx" "\n"
"movl %ecx, " STRINGIZE_VALUE_OF(PROBE_PROBE_FUNCTION_OFFSET) "(%ebp)" "\n"
"movl 3 * " STRINGIZE_VALUE_OF(PTR_SIZE) "(%eax), %ecx" "\n"
"movl %ecx, " STRINGIZE_VALUE_OF(PROBE_ARG1_OFFSET) "(%ebp)" "\n"
"movl 4 * " STRINGIZE_VALUE_OF(PTR_SIZE) "(%eax), %ecx" "\n"
"movl %ecx, " STRINGIZE_VALUE_OF(PROBE_ARG2_OFFSET) "(%ebp)" "\n"
"movl 5 * " STRINGIZE_VALUE_OF(PTR_SIZE) "(%eax), %ecx" "\n"
"movl %ecx, " STRINGIZE_VALUE_OF(PROBE_CPU_EAX_OFFSET) "(%ebp)" "\n"
"movl 6 * " STRINGIZE_VALUE_OF(PTR_SIZE) "(%eax), %ecx" "\n"
"movl %ecx, " STRINGIZE_VALUE_OF(PROBE_CPU_ESP_OFFSET) "(%ebp)" "\n"
"movdqa %xmm0, " STRINGIZE_VALUE_OF(PROBE_CPU_XMM0_OFFSET) "(%ebp)" "\n"
"movdqa %xmm1, " STRINGIZE_VALUE_OF(PROBE_CPU_XMM1_OFFSET) "(%ebp)" "\n"
"movdqa %xmm2, " STRINGIZE_VALUE_OF(PROBE_CPU_XMM2_OFFSET) "(%ebp)" "\n"
"movdqa %xmm3, " STRINGIZE_VALUE_OF(PROBE_CPU_XMM3_OFFSET) "(%ebp)" "\n"
"movdqa %xmm4, " STRINGIZE_VALUE_OF(PROBE_CPU_XMM4_OFFSET) "(%ebp)" "\n"
"movdqa %xmm5, " STRINGIZE_VALUE_OF(PROBE_CPU_XMM5_OFFSET) "(%ebp)" "\n"
"movdqa %xmm6, " STRINGIZE_VALUE_OF(PROBE_CPU_XMM6_OFFSET) "(%ebp)" "\n"
"movdqa %xmm7, " STRINGIZE_VALUE_OF(PROBE_CPU_XMM7_OFFSET) "(%ebp)" "\n"
// Reserve stack space for the arg while maintaining the required stack
// pointer 32 byte alignment:
"subl $0x20, %esp" "\n"
"movl %ebp, 0(%esp)" "\n" // the ProbeContext* arg.
"call *" STRINGIZE_VALUE_OF(PROBE_PROBE_FUNCTION_OFFSET) "(%ebp)" "\n"
// To enable probes to modify register state, we copy all registers
// out of the ProbeContext before returning.
"movl " STRINGIZE_VALUE_OF(PROBE_CPU_EDX_OFFSET) "(%ebp), %edx" "\n"
"movl " STRINGIZE_VALUE_OF(PROBE_CPU_EBX_OFFSET) "(%ebp), %ebx" "\n"
"movl " STRINGIZE_VALUE_OF(PROBE_CPU_ESI_OFFSET) "(%ebp), %esi" "\n"
"movl " STRINGIZE_VALUE_OF(PROBE_CPU_EDI_OFFSET) "(%ebp), %edi" "\n"
"movdqa " STRINGIZE_VALUE_OF(PROBE_CPU_XMM0_OFFSET) "(%ebp), %xmm0" "\n"
"movdqa " STRINGIZE_VALUE_OF(PROBE_CPU_XMM1_OFFSET) "(%ebp), %xmm1" "\n"
"movdqa " STRINGIZE_VALUE_OF(PROBE_CPU_XMM2_OFFSET) "(%ebp), %xmm2" "\n"
"movdqa " STRINGIZE_VALUE_OF(PROBE_CPU_XMM3_OFFSET) "(%ebp), %xmm3" "\n"
"movdqa " STRINGIZE_VALUE_OF(PROBE_CPU_XMM4_OFFSET) "(%ebp), %xmm4" "\n"
"movdqa " STRINGIZE_VALUE_OF(PROBE_CPU_XMM5_OFFSET) "(%ebp), %xmm5" "\n"
"movdqa " STRINGIZE_VALUE_OF(PROBE_CPU_XMM6_OFFSET) "(%ebp), %xmm6" "\n"
"movdqa " STRINGIZE_VALUE_OF(PROBE_CPU_XMM7_OFFSET) "(%ebp), %xmm7" "\n"
// There are 6 more registers left to restore:
// eax, ecx, ebp, esp, eip, and eflags.
// We need to handle these last few restores carefully because:
//
// 1. We need to push the return address on the stack for ret to use.
// That means we need to write to the stack.
// 2. The user probe function may have altered the restore value of esp to
// point to the vicinity of one of the restore values for the remaining
// registers left to be restored.
// That means, for requirement 1, we may end up writing over some of the
// restore values. We can check for this, and first copy the restore
// values to a "safe area" on the stack before commencing with the action
// for requirement 1.
// 3. For requirement 2, we need to ensure that the "safe area" is
// protected from interrupt handlers overwriting it. Hence, the esp needs
// to be adjusted to include the "safe area" before we start copying the
// the restore values.
"movl %ebp, %eax" "\n"
"addl $" STRINGIZE_VALUE_OF(PROBE_CPU_EFLAGS_OFFSET) ", %eax" "\n"
"cmpl %eax, " STRINGIZE_VALUE_OF(PROBE_CPU_ESP_OFFSET) "(%ebp)" "\n"
"jg " SYMBOL_STRING(ctiMasmProbeTrampolineEnd) "\n"
// Locate the "safe area" at 2x sizeof(ProbeContext) below where the new
// rsp will be. This time we don't have to 32-byte align it because we're
// not using to store any xmm regs.
"movl " STRINGIZE_VALUE_OF(PROBE_CPU_ESP_OFFSET) "(%ebp), %eax" "\n"
"subl $2 * " STRINGIZE_VALUE_OF(PROBE_SIZE) ", %eax" "\n"
"movl %eax, %esp" "\n"
"subl $" STRINGIZE_VALUE_OF(PROBE_CPU_EAX_OFFSET) ", %eax" "\n"
"movl " STRINGIZE_VALUE_OF(PROBE_CPU_EAX_OFFSET) "(%ebp), %ecx" "\n"
"movl %ecx, " STRINGIZE_VALUE_OF(PROBE_CPU_EAX_OFFSET) "(%eax)" "\n"
"movl " STRINGIZE_VALUE_OF(PROBE_CPU_ECX_OFFSET) "(%ebp), %ecx" "\n"
"movl %ecx, " STRINGIZE_VALUE_OF(PROBE_CPU_ECX_OFFSET) "(%eax)" "\n"
"movl " STRINGIZE_VALUE_OF(PROBE_CPU_EBP_OFFSET) "(%ebp), %ecx" "\n"
"movl %ecx, " STRINGIZE_VALUE_OF(PROBE_CPU_EBP_OFFSET) "(%eax)" "\n"
"movl " STRINGIZE_VALUE_OF(PROBE_CPU_ESP_OFFSET) "(%ebp), %ecx" "\n"
"movl %ecx, " STRINGIZE_VALUE_OF(PROBE_CPU_ESP_OFFSET) "(%eax)" "\n"
"movl " STRINGIZE_VALUE_OF(PROBE_CPU_EIP_OFFSET) "(%ebp), %ecx" "\n"
"movl %ecx, " STRINGIZE_VALUE_OF(PROBE_CPU_EIP_OFFSET) "(%eax)" "\n"
"movl " STRINGIZE_VALUE_OF(PROBE_CPU_EFLAGS_OFFSET) "(%ebp), %ecx" "\n"
"movl %ecx, " STRINGIZE_VALUE_OF(PROBE_CPU_EFLAGS_OFFSET) "(%eax)" "\n"
"movl %eax, %ebp" "\n"
SYMBOL_STRING(ctiMasmProbeTrampolineEnd) ":" "\n"
"movl " STRINGIZE_VALUE_OF(PROBE_CPU_ESP_OFFSET) "(%ebp), %eax" "\n"
"subl $5 * " STRINGIZE_VALUE_OF(PTR_SIZE) ", %eax" "\n"
// At this point, %esp should be < %eax.
"movl " STRINGIZE_VALUE_OF(PROBE_CPU_EFLAGS_OFFSET) "(%ebp), %ecx" "\n"
"movl %ecx, 0 * " STRINGIZE_VALUE_OF(PTR_SIZE) "(%eax)" "\n"
"movl " STRINGIZE_VALUE_OF(PROBE_CPU_EAX_OFFSET) "(%ebp), %ecx" "\n"
"movl %ecx, 1 * " STRINGIZE_VALUE_OF(PTR_SIZE) "(%eax)" "\n"
"movl " STRINGIZE_VALUE_OF(PROBE_CPU_ECX_OFFSET) "(%ebp), %ecx" "\n"
"movl %ecx, 2 * " STRINGIZE_VALUE_OF(PTR_SIZE) "(%eax)" "\n"
"movl " STRINGIZE_VALUE_OF(PROBE_CPU_EBP_OFFSET) "(%ebp), %ecx" "\n"
"movl %ecx, 3 * " STRINGIZE_VALUE_OF(PTR_SIZE) "(%eax)" "\n"
"movl " STRINGIZE_VALUE_OF(PROBE_CPU_EIP_OFFSET) "(%ebp), %ecx" "\n"
"movl %ecx, 4 * " STRINGIZE_VALUE_OF(PTR_SIZE) "(%eax)" "\n"
"movl %eax, %esp" "\n"
"popfd" "\n"
"popl %eax" "\n"
"popl %ecx" "\n"
"popl %ebp" "\n"
"ret" "\n"
);
#endif // USE(MASM_PROBE)
#endif // COMPILER(GCC)
#if COMPILER(MSVC)
extern "C" {
// FIXME: Since Windows doesn't use the LLInt, we have inline stubs here.
// Until the LLInt is changed to support Windows, these stub needs to be updated.
__declspec(naked) EncodedJSValue callToJavaScript(void* code, ExecState**, ProtoCallFrame*, Register*)
{
__asm {
mov edx, [esp]
push ebp;
mov eax, ebp;
mov ebp, esp;
push esi;
push edi;
push ebx;
sub esp, 0x1c;
mov ecx, dword ptr[esp + 0x34];
mov esi, dword ptr[esp + 0x38];
mov ebp, dword ptr[esp + 0x3c];
sub ebp, 0x20;
mov dword ptr[ebp + 0x24], 0;
mov dword ptr[ebp + 0x20], 0;
mov dword ptr[ebp + 0x1c], 0;
mov dword ptr[ebp + 0x18], ecx;
mov ebx, [ecx];
mov dword ptr[ebp + 0x14], 0;
mov dword ptr[ebp + 0x10], ebx;
mov dword ptr[ebp + 0xc], 0;
mov dword ptr[ebp + 0x8], 1;
mov dword ptr[ebp + 0x4], edx;
mov dword ptr[ebp], eax;
mov eax, ebp;
mov edx, dword ptr[esi + 0x28];
add edx, 5;
sal edx, 3;
sub ebp, edx;
mov dword ptr[ebp], eax;
mov eax, 5;
copyHeaderLoop:
sub eax, 1;
mov ecx, dword ptr[esi + eax * 8];
mov dword ptr 8[ebp + eax * 8], ecx;
mov ecx, dword ptr 4[esi + eax * 8];
mov dword ptr 12[ebp + eax * 8], ecx;
test eax, eax;
jnz copyHeaderLoop;
mov edx, dword ptr[esi + 0x18];
sub edx, 1;
mov ecx, dword ptr[esi + 0x28];
sub ecx, 1;
cmp edx, ecx;
je copyArgs;
xor eax, eax;
mov ebx, -4;
fillExtraArgsLoop:
sub ecx, 1;
mov dword ptr 0x30[ebp + ecx * 8], eax;
mov dword ptr 0x34[ebp + ecx * 8], ebx;
cmp edx, ecx;
jne fillExtraArgsLoop;
copyArgs:
mov eax, dword ptr[esi + 0x2c];
copyArgsLoop:
test edx, edx;
jz copyArgsDone;
sub edx, 1;
mov ecx, dword ptr 0[eax + edx * 8];
mov ebx, dword ptr 4[eax + edx * 8];
mov dword ptr 0x30[ebp + edx * 8], ecx;
mov dword ptr 0x34[ebp + edx * 8], ebx;
jmp copyArgsLoop;
copyArgsDone:
mov ecx, dword ptr[esp + 0x34];
mov dword ptr[ecx], ebp;
call dword ptr[esp + 0x30];
cmp dword ptr[ebp + 8], 1;
je calleeFramePopped;
mov ebp, dword ptr[ebp];
calleeFramePopped:
mov ecx, dword ptr[ebp + 0x18];
mov ebx, dword ptr[ebp + 0x10];
mov dword ptr[ecx], ebx;
add esp, 0x1c;
pop ebx;
pop edi;
pop esi;
pop ebp;
ret;
}
}
__declspec(naked) void returnFromJavaScript()
{
__asm {
add esp, 0x1c;
pop ebx;
pop edi;
pop esi;
pop ebp;
ret;
}
}
__declspec(naked) EncodedJSValue callToNativeFunction(void* code, ExecState**, ProtoCallFrame*, Register*)
{
__asm {
mov edx, [esp]
push ebp;
mov eax, ebp;
mov ebp, esp;
push esi;
push edi;
push ebx;
sub esp, 0x1c;
mov ecx, [esp + 0x34];
mov esi, [esp + 0x38];
mov ebp, [esp + 0x3c];
sub ebp, 0x20;
mov dword ptr[ebp + 0x24], 0;
mov dword ptr[ebp + 0x20], 0;
mov dword ptr[ebp + 0x1c], 0;
mov dword ptr[ebp + 0x18], ecx;
mov ebx, [ecx];
mov dword ptr[ebp + 0x14], 0;
mov dword ptr[ebp + 0x10], ebx;
mov dword ptr[ebp + 0xc], 0;
mov dword ptr[ebp + 0x8], 1;
mov dword ptr[ebp + 0x4], edx;
mov dword ptr[ebp], eax;
mov eax, ebp;
mov edx, dword ptr[esi + 0x28];
add edx, 5;
sal edx, 3;
sub ebp, edx;
mov dword ptr[ebp], eax;
mov eax, 5;
copyHeaderLoop:
sub eax, 1;
mov ecx, dword ptr[esi + eax * 8];
mov dword ptr 8[ebp + eax * 8], ecx;
mov ecx, dword ptr 4[esi + eax * 8];
mov dword ptr 12[ebp + eax * 8], ecx;
test eax, eax;
jnz copyHeaderLoop;
mov edx, dword ptr[esi + 0x18];
sub edx, 1;
mov ecx, dword ptr[esi + 0x28];
sub ecx, 1;
cmp edx, ecx;
je copyArgs;
xor eax, eax;
mov ebx, -4;
fillExtraArgsLoop:
sub ecx, 1;
mov dword ptr 0x30[ebp + ecx * 8], eax;
mov dword ptr 0x34[ebp + ecx * 8], ebx;
cmp edx, ecx;
jne fillExtraArgsLoop;
copyArgs:
mov eax, dword ptr[esi + 0x2c];
copyArgsLoop:
test edx, edx;
jz copyArgsDone;
sub edx, 1;
mov ecx, dword ptr 0[eax + edx * 8];
mov ebx, dword ptr 4[eax + edx * 8];
mov dword ptr 0x30[ebp + edx * 8], ecx;
mov dword ptr 0x34[ebp + edx * 8], ebx;
jmp copyArgsLoop;
copyArgsDone:
mov ecx, dword ptr[esp + 0x34];
mov dword ptr[ecx], ebp;
mov edi, dword ptr[esp + 0x30];
mov dword ptr[esp + 0x30], ebp;
mov ecx, ebp;
call edi;
cmp dword ptr[ebp + 8], 1;
je calleeFramePopped;
mov ebp, dword ptr[ebp];
calleeFramePopped:
mov ecx, dword ptr[ebp + 0x18];
mov ebx, dword ptr[ebp + 0x10];
mov dword ptr[ecx], ebx;
add esp, 0x1c;
pop ebx;
pop edi;
pop esi;
pop ebp;
ret;
}
}
}
#endif // COMPILER(MSVC)
} // namespace JSC
#endif // JITStubsX86_h
|
