Changeset 225301 in webkit for trunk/Source/JavaScriptCore/assembler/ProbeContext.cpp

Timestamp:

Nov 29, 2017, 4:16:19 PM (8 years ago)

Author:

[email protected]

Message:

Source/JavaScriptCore:
[MIPS][JSC] Implement MacroAssembler::probe support on MIPS
​https://bugs.webkit.org/show_bug.cgi?id=175447

Patch by Stanislav Ocovaj <​[email protected]> on 2017-11-29
Reviewed by Carlos Alberto Lopez Perez.

This patch allows DFG JIT to be enabled on MIPS platforms.

• Sources.txt:
• assembler/MIPSAssembler.h:

(JSC::MIPSAssembler::lastSPRegister):
(JSC::MIPSAssembler::numberOfSPRegisters):
(JSC::MIPSAssembler::sprName):

• assembler/MacroAssemblerMIPS.cpp: Added.

(JSC::MacroAssembler::probe):

• assembler/ProbeContext.cpp:

(JSC::Probe::executeProbe):

• assembler/ProbeContext.h:

(JSC::Probe::CPUState::pc):

• assembler/testmasm.cpp:

(JSC::isSpecialGPR):
(JSC::testProbePreservesGPRS):
(JSC::testProbeModifiesStackPointer):
(JSC::testProbeModifiesStackValues):

Source/WTF:
[DFG][MIPS] Enable DFG JIT on MIPS.
​https://bugs.webkit.org/show_bug.cgi?id=175447

Patch by Stanislav Ocovaj <​[email protected]> on 2017-11-29
Reviewed by Carlos Alberto Lopez Perez.

• wtf/Platform.h:

File:

• trunk/Source/JavaScriptCore/assembler/ProbeContext.cpp (modified) (2 diffs)

trunk/Source/JavaScriptCore/assembler/ProbeContext.cpp

@@ -41 +41 @@
     void* originalLR = cpu.gpr<void*>(ARM64Registers::lr);
     void* originalPC = cpu.pc();
+#elif CPU(MIPS)
+    auto& cpu = context.cpu;
+    void* originalRA = cpu.gpr<void*>(MIPSRegisters::ra);
+    void* originalPC = cpu.pc();
 #endif
 
@@ -50 +54 @@
     // The ARM64 probe trampoline does not support changing both lr and pc.
     RELEASE_ASSERT(originalPC == cpu.pc() || originalLR == cpu.gpr<void*>(ARM64Registers::lr));
+#elif CPU(MIPS)
+    // The MIPS probe trampoline does not support changing both ra and pc.
+    RELEASE_ASSERT(originalPC == cpu.pc() || originalRA == cpu.gpr<void*>(MIPSRegisters::ra));
 #endif