Add MASM_PROBE support for ARM64.
https://bugs.webkit.org/show_bug.cgi?id=150128
Reviewed by Michael Saboff.
- JavaScriptCore.xcodeproj/project.pbxproj:
- assembler/ARM64Assembler.h:
- Convert the ARM64 registers enum list into a macro list so that we can use
it elsewhere e.g. to declare fields in the probe CPUState.
Also de-tabbed the contents of the ARM64Registers namespace since the enum
list change touches almost all of it anyway. This reduces the amount of
complaints from the style checker.
- assembler/AbstractMacroAssembler.h:
(JSC::AbstractMacroAssembler::CPUState::registerName):
(JSC::AbstractMacroAssembler::CPUState::registerValue):
- Change CPUState methods to allow for registers ID that do not map to one of
its fields. This is needed because ARM64's registers include aliases for some
register names. The CPUState will not allocate separate storage for the
aliases.
- assembler/MacroAssemblerARM64.cpp: Added.
(JSC::arm64ProbeTrampoline):
- Unlike the probe mechanism for other CPUs, the ARM64 implementation does not
allow the probe function to modify the sp and pc registers. We insert this
wrapper function between ctiMasmProbeTrampoline() and the user's probe function
so that we can check if the user tried to modify sp and pc. If so, we will
print an error message so that we can alert the user that we don't support
that on ARM64.
See the comment in ctiMasmProbeTrampoline() in JITStubsARM64.h for details
on why we cannot support sp and pc modifications by the probe function.
(JSC::MacroAssemblerARM64::probe):
- assembler/MacroAssemblerARM64.h:
(JSC::MacroAssemblerARM64::repatchCall):
(JSC::MacroAssemblerARM64::makeBranch):
- jit/JITStubs.cpp:
- jit/JITStubsARM64.h: Added.
