Add ARM target for CoreCLR on Linux.

c_runtime/vprintf/test1 is disabled as casting NULL to va_list is
against the C specification.

Fix SetFilePointer tests on 32 bit platforms.

Define _FILE_OFFSET_BITS=64 so that we have long file support on 32 bit
platforms.

Implement context capture/restore for ARM.

Link libgcc_s before libunwind on ARM so C++ exceptions work.

Translate armasm to gas syntax.

Specify Thumb, VFPv3, ARMv7 for the ARM target.

Add ARM configuration to mscorlib build

Implement GetLogicalProcessorCacheSizeFromOS in PAL.

Set UNWIND_CONTEXT_IS_UCONTEXT_T from configure check.

3 files changed, 55 insertions, 14 deletions

diff --git a/src/ToolBox/SOS/Strike/CMakeLists.txt b/src/ToolBox/SOS/Strike/CMakeLists.txt
index 9e9ef54ca0..ce909d7989 100644
--- a/src/ToolBox/SOS/Strike/CMakeLists.txt
+++ b/src/ToolBox/SOS/Strike/CMakeLists.txt
@@ -1,7 +1,14 @@
-add_definitions(-DSOS_TARGET_AMD64=1)
-add_definitions(-D_TARGET_WIN64_=1)
-add_definitions(-DDBG_TARGET_64BIT)
-add_definitions(-DDBG_TARGET_WIN64=1)
+if(CLR_CMAKE_PLATFORM_ARCH_AMD64)
+  add_definitions(-DSOS_TARGET_AMD64=1)
+  add_definitions(-D_TARGET_WIN64_=1)
+  add_definitions(-DDBG_TARGET_64BIT)
+  add_definitions(-DDBG_TARGET_WIN64=1)
+elseif(CLR_CMAKE_PLATFORM_ARCH_ARM)
+  add_definitions(-DSOS_TARGET_ARM=1)
+  add_definitions(-D_TARGET_WIN32_=1)
+  add_definitions(-DDBG_TARGET_32BIT)
+  add_definitions(-DDBG_TARGET_WIN32=1)
+endif()
 add_definitions(-DSTRIKE)  
 
 remove_definitions(-DUNICODE)
@@ -38,12 +45,18 @@ if(WIN32)
     WatchCmd.cpp
     Native.rc
   )
-
-  set(SOS_SOURCES_AMD64
-    disasmX86.cpp
-  )
-
-  list(APPEND SOS_SOURCES ${SOS_SOURCES_AMD64})
+  
+  if(CLR_CMAKE_PLATFORM_ARCH_AMD64)
+      set(SOS_SOURCES_ARCH
+        disasmX86.cpp
+      )
+  elseif(CLR_CMAKE_PLATFORM_ARCH_ARM)
+      set(SOS_SOURCES_ARCH
+        disasmARM.cpp
+      )
+  endif()
+  
+  list(APPEND SOS_SOURCES ${SOS_SOURCES_ARCH})
 
   add_definitions(-DFX_VER_INTERNALNAME_STR=SOS.dll)
 
diff --git a/src/ToolBox/SOS/lldbplugin/CMakeLists.txt b/src/ToolBox/SOS/lldbplugin/CMakeLists.txt
index 945c23acf8..798c91a142 100644
--- a/src/ToolBox/SOS/lldbplugin/CMakeLists.txt
+++ b/src/ToolBox/SOS/lldbplugin/CMakeLists.txt
@@ -2,10 +2,17 @@ project(sosplugin)
 
 set(CMAKE_INCLUDE_CURRENT_DIR ON)
 
-add_definitions(-D_TARGET_AMD64_=1)
-add_definitions(-DDBG_TARGET_64BIT=1)
-add_definitions(-DDBG_TARGET_AMD64=1)
-add_definitions(-DDBG_TARGET_WIN64=1)
+if(CLR_CMAKE_PLATFORM_ARCH_AMD64)
+    add_definitions(-D_TARGET_AMD64_=1)
+    add_definitions(-DDBG_TARGET_64BIT=1)
+    add_definitions(-DDBG_TARGET_AMD64=1)
+    add_definitions(-DDBG_TARGET_WIN64=1)
+elseif(CLR_CMAKE_PLATFORM_ARCH_ARM)
+    add_definitions(-D_TARGET_ARM_=1)
+    add_definitions(-DDBG_TARGET_32BIT=1)
+    add_definitions(-DDBG_TARGET_ARM=1)
+    add_definitions(-DDBG_TARGET_WIN32=1)
+endif()
 
 set(ENABLE_LLDBPLUGIN ${CLR_CMAKE_PLATFORM_UNIX} CACHE BOOL "Enable building the SOS plugin for LLDB.")
 set(REQUIRE_LLDBPLUGIN ${CLR_CMAKE_PLATFORM_LINUX} CACHE BOOL "Require building the SOS plugin for LLDB.")
diff --git a/src/ToolBox/SOS/lldbplugin/debugclient.cpp b/src/ToolBox/SOS/lldbplugin/debugclient.cpp
index 75d5cee594..f2a690b73b 100644
--- a/src/ToolBox/SOS/lldbplugin/debugclient.cpp
+++ b/src/ToolBox/SOS/lldbplugin/debugclient.cpp
@@ -849,6 +849,7 @@ DebugClient::GetThreadContextById(
     dtcontext = (DT_CONTEXT*)context;
     dtcontext->ContextFlags = contextFlags;
 
+#ifdef DBG_TARGET_AMD64
     dtcontext->Rip = frame.GetPC();
     dtcontext->Rsp = frame.GetSP();
     dtcontext->Rbp = frame.GetFP();
@@ -875,6 +876,26 @@ DebugClient::GetThreadContextById(
     dtcontext->SegEs = GetRegister(frame, "es");
     dtcontext->SegFs = GetRegister(frame, "fs");
     dtcontext->SegGs = GetRegister(frame, "gs");
+#elif DBG_TARGET_ARM
+    dtcontext->Pc = frame.GetPC();
+    dtcontext->Sp = frame.GetSP();
+    dtcontext->Lr = GetRegister(frame, "lr");
+    dtcontext->Cpsr = GetRegister(frame, "cpsr");
+
+    dtcontext->R0 = GetRegister(frame, "r0");
+    dtcontext->R1 = GetRegister(frame, "r1");
+    dtcontext->R2 = GetRegister(frame, "r2");
+    dtcontext->R3 = GetRegister(frame, "r3");
+    dtcontext->R4 = GetRegister(frame, "r4");
+    dtcontext->R5 = GetRegister(frame, "r5");
+    dtcontext->R6 = GetRegister(frame, "r6");
+    dtcontext->R7 = GetRegister(frame, "r7");
+    dtcontext->R8 = GetRegister(frame, "r8");
+    dtcontext->R9 = GetRegister(frame, "r9");
+    dtcontext->R10 = GetRegister(frame, "r10");
+    dtcontext->R11 = GetRegister(frame, "r11");
+    dtcontext->R12 = GetRegister(frame, "r12");
+#endif
 
     hr = S_OK;