port this to arm64, and maybe fix the other ports in the

MachineStackMarker.cpp.  i didn't compile i386, arm or
mips with this, but it has a chance of working vs the
existing freebsd-derived patch.

XXX: someone extend this to all our CPUs, please.  i
     only fixed the existing maybe claimed support.

x11/qt5-qtwebkit/distinfo

@@ -1,14 +1,15 @@
-$NetBSD: distinfo,v 1.14 2019/07/20 18:29:33 nia Exp $
+$NetBSD: distinfo,v 1.15 2019/12/13 09:48:02 mrg Exp $
 
 SHA1 (qtwebkit-5.212.0-alpha3.tar.xz) = dd17b3884ccc20c9fce0f151738f923ec8cd147b
 RMD160 (qtwebkit-5.212.0-alpha3.tar.xz) = 5a28f56735b7d3e98dd82f0a2566d9e31e0c37a3
 SHA512 (qtwebkit-5.212.0-alpha3.tar.xz) = 38794514b886de3fa63a41277c2bcbb970e87a12070962b527e3898466cf7ad3b65ce4588669498415d365310b37729e81aabb457808fe11120558ef8e35445f
 Size (qtwebkit-5.212.0-alpha3.tar.xz) = 12457896 bytes
 SHA1 (patch-Source_JavaScriptCore_API_ObjCCallbackFunction.h) = be77c4b19f5f97c12180c1b7d3b72968364f3229
+SHA1 (patch-Source_JavaScriptCore_assembler_ARM64Assembler.h) = 8b502d6960e5b52000dd6e67f65c2fbaf6e9d1f2
 SHA1 (patch-Source_JavaScriptCore_assembler_ARMAssembler.h) = 7bbb0a59a0c087abaaddda08fc31aa24809acb70
 SHA1 (patch-Source_JavaScriptCore_assembler_MacroAssemblerARM.cpp) = 79b54cb1d03d976a0629fbd8ee9ac1881951ba10
 SHA1 (patch-Source_JavaScriptCore_dfg_DFGNode.h) = a3eba122c7226a80dacf1b762747fe0a7408b849
-SHA1 (patch-Source_JavaScriptCore_heap_MachineStackMarker.cpp) = a5815dd5794d9ffbd49e5793198a06535ad89d3c
+SHA1 (patch-Source_JavaScriptCore_heap_MachineStackMarker.cpp) = 35f2ba0cc3fe0d76c28a3a244621291a17a5334a
 SHA1 (patch-Source_JavaScriptCore_jit_ThunkGenerators.cpp) = f0ca56e4b4060c0a8d756289d7c25d1ead6b07be
 SHA1 (patch-Source_JavaScriptCore_tools_CodeProfiling.cpp) = 94c139413eecb875bba98c7749bba24cfcc16632
 SHA1 (patch-Source_ThirdParty_gtest_include_gtest_internal_gtest-port.h) = 1e4b8cffbd7ec0a6130a0ec2112023bed5c0b78e

x11/qt5-qtwebkit/patches/patch-Source_JavaScriptCore_assembler_ARM64Assembler.h

@@ -0,0 +1,15 @@
+$NetBSD: patch-Source_JavaScriptCore_assembler_ARM64Assembler.h,v 1.1 2019/12/13 09:48:02 mrg Exp $
+
+find a valid clear cache for netbsd/arm64.
+
+--- Source/JavaScriptCore/assembler/ARM64Assembler.h.orig	2019-12-07 02:31:00.900806242 -0800
++++ Source/JavaScriptCore/assembler/ARM64Assembler.h	2019-12-07 02:30:09.650436008 -0800
+@@ -2666,6 +2666,8 @@
+     {
+ #if OS(IOS)
+         sys_cache_control(kCacheFunctionPrepareForExecution, code, size);
++#elif OS(NETBSD)
++	__builtin___clear_cache(code, reinterpret_cast<char*>(code) + size);
+ #elif OS(LINUX)
+         size_t page = pageSize();
+         uintptr_t current = reinterpret_cast<uintptr_t>(code);

x11/qt5-qtwebkit/patches/patch-Source_JavaScriptCore_heap_MachineStackMarker.cpp

@@ -1,28 +1,25 @@
-$NetBSD: patch-Source_JavaScriptCore_heap_MachineStackMarker.cpp,v 1.2 2018/01/17 19:37:33 markd Exp $
+$NetBSD: patch-Source_JavaScriptCore_heap_MachineStackMarker.cpp,v 1.3 2019/12/13 09:48:02 mrg Exp $
 
-Support NetBSD
+Support NetBSD on x86, arm, arm64 and mips.
 
-XXXX - currently only did CPU(X86_64) and guessed those values.
-    rest are currently jsut copied from FreeBSD
-
---- Source/JavaScriptCore/heap/MachineStackMarker.cpp.orig	2017-06-04 20:16:05.000000000 +0000
-+++ Source/JavaScriptCore/heap/MachineStackMarker.cpp
-@@ -665,6 +665,22 @@ void* MachineThreads::Thread::Registers:
+--- Source/JavaScriptCore/heap/MachineStackMarker.cpp.orig	2019-06-26 09:25:02.000000000 -0700
++++ Source/JavaScriptCore/heap/MachineStackMarker.cpp	2019-12-12 19:40:05.519044971 -0800
+@@ -665,6 +665,22 @@
  #error Unknown Architecture
  #endif
  
 +#elif OS(NETBSD)
 +
 +#if CPU(X86)
-+    return reinterpret_cast<void*>((uintptr_t) regs.machineContext.mc_ebp);
++    return reinterpret_cast<void*>((uintptr_t) regs.machineContext.__gregs[_REG_EBP]);
 +#elif CPU(X86_64)
 +    return reinterpret_cast<void*>((uintptr_t) regs.machineContext.__gregs[_REG_RBP]);
 +#elif CPU(ARM)
 +    return reinterpret_cast<void*>((uintptr_t) regs.machineContext.__gregs[_REG_FP]);
 +#elif CPU(ARM64)
-+    return reinterpret_cast<void*>((uintptr_t) regs.machineContext.mc_gpregs.gp_x[29]);
++    return reinterpret_cast<void*>((uintptr_t) regs.machineContext.__gregs[_REG_X29]);
 +#elif CPU(MIPS)
-+    return reinterpret_cast<void*>((uintptr_t) regs.machineContext.mc_regs[30]);
++    return reinterpret_cast<void*>((uintptr_t) regs.machineContext.__gregs[_REG_S8]);
 +#else
 +#error Unknown Architecture
 +#endif
@@ -30,22 +27,22 @@ XXXX - currently only did CPU(X86_64) and guessed those values.
  #elif defined(__GLIBC__)
  
  // The following sequence depends on glibc's sys/ucontext.h.
-@@ -747,6 +763,22 @@ void* MachineThreads::Thread::Registers:
+@@ -747,6 +763,22 @@
  #error Unknown Architecture
  #endif
  
 +#elif OS(NETBSD)
 +
 +#if CPU(X86)
-+    return reinterpret_cast<void*>((uintptr_t) regs.machineContext.mc_eip);
++    return reinterpret_cast<void*>((uintptr_t) regs.machineContext.__gregs[_REG_EIP]);
 +#elif CPU(X86_64)
 +    return reinterpret_cast<void*>((uintptr_t) regs.machineContext.__gregs[_REG_RIP]);
 +#elif CPU(ARM)
 +    return reinterpret_cast<void*>((uintptr_t) regs.machineContext.__gregs[_REG_PC]);
 +#elif CPU(ARM64)
-+    return reinterpret_cast<void*>((uintptr_t) regs.machineContext.mc_gpregs.gp_elr);
++    return reinterpret_cast<void*>((uintptr_t) regs.machineContext.__gregs[_REG_ELR]);
 +#elif CPU(MIPS)
-+    return reinterpret_cast<void*>((uintptr_t) regs.machineContext.mc_pc);
++    return reinterpret_cast<void*>((uintptr_t) regs.machineContext.__gregs[_REG_EPC]);
 +#else
 +#error Unknown Architecture
 +#endif
@@ -53,22 +50,22 @@ XXXX - currently only did CPU(X86_64) and guessed those values.
  #elif defined(__GLIBC__)
  
  // The following sequence depends on glibc's sys/ucontext.h.
-@@ -838,6 +870,22 @@ void* MachineThreads::Thread::Registers:
+@@ -838,6 +870,22 @@
  #error Unknown Architecture
  #endif
  
 +#elif OS(NETBSD)
 +
 +#if CPU(X86)
-+    return reinterpret_cast<void*>((uintptr_t) regs.machineContext.mc_esi);
++    return reinterpret_cast<void*>((uintptr_t) regs.machineContext.__gregs[_REG_ESI]);
 +#elif CPU(X86_64)
 +    return reinterpret_cast<void*>((uintptr_t) regs.machineContext.__gregs[_REG_R8]);
 +#elif CPU(ARM)
 +    return reinterpret_cast<void*>((uintptr_t) regs.machineContext.__gregs[_REG_R8]);
 +#elif CPU(ARM64)
-+    return reinterpret_cast<void*>((uintptr_t) regs.machineContext.mc_gpregs.gp_x[4]);
++    return reinterpret_cast<void*>((uintptr_t) regs.machineContext.__gregs[_REG_R4]);
 +#elif CPU(MIPS)
-+    return reinterpret_cast<void*>((uintptr_t) regs.machineContext.mc_regs[12]);
++    return reinterpret_cast<void*>((uintptr_t) regs.machineContext.__gregs[_REG_T4]);
 +#else
 +#error Unknown Architecture
 +#endif