Keep only base/extractor.[cc|h].

base/exception_utils.cc

-// Copyright 2006-2009 Google Inc.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-// ========================================================================
-
-#include "exception_utils.h"
-
-
-// Capture a CONTEXT that represents machine state at callsite
-// TODO(omaha): 64 bit platforms can pass through to
-//      RtlCaptureContext (or can they?)
-__declspec(naked) PCONTEXT WINAPI CaptureContext(PCONTEXT runner) {
-  runner;   // unreferenced formal parameter
-  __asm {
-    // set up a call frame
-    push ebp
-    mov ebp, esp
-
-    // save ecx for later
-    push ecx
-
-    // fetch the context record pointer argument into ecx
-    // which we use as pointer to context throughout the rest
-    // of this function
-    mov ecx, DWORD PTR [ebp + 8]
-
-    // set flags
-    mov [ecx]CONTEXT.ContextFlags, CONTEXT_SEGMENTS | CONTEXT_INTEGER | \
-                                   CONTEXT_CONTROL | CONTEXT_FLOATING_POINT
-
-    // stash the integer registers away
-    mov [ecx]CONTEXT.Edi, edi
-    mov [ecx]CONTEXT.Ebx, ebx
-    mov [ecx]CONTEXT.Edx, edx
-    mov [ecx]CONTEXT.Eax, eax
-    mov [ecx]CONTEXT.Esi, esi
-    // get the saved ecx
-    pop eax
-    mov [ecx]CONTEXT.Ecx, eax
-
-    // now control registers
-    pushfd
-    pop eax
-    mov [ecx]CONTEXT.EFlags, eax
-
-    // get the old ebp, our FP points to it
-    mov eax, [ebp]
-    mov [ecx]CONTEXT.Ebp, eax
-
-    // get return address and record as eip
-    mov eax, [ebp + 4]
-    mov [ecx]CONTEXT.Eip, eax
-
-    // esp post-return is ...
-    lea eax, [ebp + 0xC]
-    mov [ecx]CONTEXT.Esp, eax
-
-    // snarf segment registers
-    mov word ptr [ecx]CONTEXT.SegSs, ss
-    mov word ptr [ecx]CONTEXT.SegCs, cs
-    mov word ptr [ecx]CONTEXT.SegGs, gs
-    mov word ptr [ecx]CONTEXT.SegFs, fs
-    mov word ptr [ecx]CONTEXT.SegEs, es
-    mov word ptr [ecx]CONTEXT.SegDs, ds
-
-    // and lastly grab floating point state
-    fnsave [ecx]CONTEXT.FloatSave
-
-    // return the CONTEXT pointer
-    mov eax, ecx
-
-    // and return
-    pop ebp
-    ret 4
-  }
-}