win: Implement exception snapshot

snapshot/win/cpu_context_win.cc

+// Copyright 2015 The Crashpad Authors. All rights reserved.
+//
+// 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 "snapshot/win/cpu_context_win.h"
+
+#include <string.h>
+
+#include "base/logging.h"
+#include "snapshot/cpu_context.h"
+
+namespace crashpad {
+
+#if defined(ARCH_CPU_64_BITS)
+
+void InitializeX86Context(const WOW64_CONTEXT& context, CPUContextX86* out) {
+  CHECK(false) << "TODO(scottmg) InitializeX86Context()";
+}
+
+void InitializeX64Context(const CONTEXT& context, CPUContextX86_64* out) {
+  out->rax = context.Rax;
+  out->rbx = context.Rbx;
+  out->rcx = context.Rcx;
+  out->rdx = context.Rdx;
+  out->rdi = context.Rdi;
+  out->rsi = context.Rsi;
+  out->rbp = context.Rbp;
+  out->rsp = context.Rsp;
+  out->r8 = context.R8;
+  out->r9 = context.R9;
+  out->r10 = context.R10;
+  out->r11 = context.R11;
+  out->r12 = context.R12;
+  out->r13 = context.R13;
+  out->r14 = context.R14;
+  out->r15 = context.R15;
+  out->rip = context.Rip;
+  out->rflags = context.EFlags;
+  out->cs = context.SegCs;
+  out->fs = context.SegFs;
+  out->gs = context.SegGs;
+
+  out->dr0 = context.Dr0;
+  out->dr1 = context.Dr1;
+  out->dr2 = context.Dr2;
+  out->dr3 = context.Dr3;
+  // DR4 and DR5 are obsolete synonyms for DR6 and DR7, see
+  // http://en.wikipedia.org/wiki/X86_debug_register.
+  out->dr4 = context.Dr6;
+  out->dr5 = context.Dr7;
+  out->dr6 = context.Dr6;
+  out->dr7 = context.Dr7;
+
+  static_assert(sizeof(out->fxsave) == sizeof(context.FltSave),
+                "types must be equivalent");
+  memcpy(&out->fxsave, &context.FltSave.ControlWord, sizeof(out->fxsave));
+}
+
+#else  // ARCH_CPU_64_BITS
+
+void InitializeX86Context(const CONTEXT& context, CPUContextX86* out) {
+  CHECK(false) << "TODO(scottmg) InitializeX86Context()";
+}
+
+#endif  // ARCH_CPU_64_BITS
+
+}  // namespace crashpad