1 files changed, 204 insertions, 0 deletions
diff --git a/3rdParty/Breakpad/src/common/dwarf/cfi_assembler.cc b/3rdParty/Breakpad/src/common/dwarf/cfi_assembler.cc
new file mode 100644
index 0000000..2dc2208
--- /dev/null
+++ b/3rdParty/Breakpad/src/common/dwarf/cfi_assembler.cc
@@ -0,0 +1,204 @@
+// Copyright (c) 2010, Google Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+// Original author: Jim Blandy <jimb@mozilla.com> <jimb@red-bean.com>
+
+// cfi_assembler.cc: Implementation of google_breakpad::CFISection class.
+// See cfi_assembler.h for details.
+
+#include "common/dwarf/cfi_assembler.h"
+
+#include <assert.h>
+#include <stdlib.h>
+
+namespace google_breakpad {
+
+using dwarf2reader::DwarfPointerEncoding;
+  
+CFISection &CFISection::CIEHeader(uint64_t code_alignment_factor,
+                                  int data_alignment_factor,
+                                  unsigned return_address_register,
+                                  uint8_t version,
+                                  const string &augmentation,
+                                  bool dwarf64,
+                                  uint8_t address_size,
+                                  uint8_t segment_size) {
+  assert(!entry_length_);
+  entry_length_ = new PendingLength();
+  in_fde_ = false;
+
+  if (dwarf64) {
+    D32(kDwarf64InitialLengthMarker);
+    D64(entry_length_->length);
+    entry_length_->start = Here();
+    D64(eh_frame_ ? kEHFrame64CIEIdentifier : kDwarf64CIEIdentifier);
+  } else {
+    D32(entry_length_->length);
+    entry_length_->start = Here();
+    D32(eh_frame_ ? kEHFrame32CIEIdentifier : kDwarf32CIEIdentifier);
+  }
+  D8(version);
+  AppendCString(augmentation);
+  if (version >= 4) {
+    D8(address_size);
+    D8(segment_size);
+  }
+  ULEB128(code_alignment_factor);
+  LEB128(data_alignment_factor);
+  if (version == 1)
+    D8(return_address_register);
+  else
+    ULEB128(return_address_register);
+  return *this;
+}
+
+CFISection &CFISection::FDEHeader(Label cie_pointer,
+                                  uint64_t initial_location,
+                                  uint64_t address_range,
+                                  bool dwarf64) {
+  assert(!entry_length_);
+  entry_length_ = new PendingLength();
+  in_fde_ = true;
+  fde_start_address_ = initial_location;
+
+  if (dwarf64) {
+    D32(0xffffffff);
+    D64(entry_length_->length);
+    entry_length_->start = Here();
+    if (eh_frame_)
+      D64(Here() - cie_pointer);
+    else
+      D64(cie_pointer);
+  } else {
+    D32(entry_length_->length);
+    entry_length_->start = Here();
+    if (eh_frame_)
+      D32(Here() - cie_pointer);
+    else
+      D32(cie_pointer);
+  }
+  EncodedPointer(initial_location);
+  // The FDE length in an .eh_frame section uses the same encoding as the
+  // initial location, but ignores the base address (selected by the upper
+  // nybble of the encoding), as it's a length, not an address that can be
+  // made relative.
+  EncodedPointer(address_range,
+                 DwarfPointerEncoding(pointer_encoding_ & 0x0f));
+  return *this;
+}
+
+CFISection &CFISection::FinishEntry() {
+  assert(entry_length_);
+  Align(address_size_, dwarf2reader::DW_CFA_nop);
+  entry_length_->length = Here() - entry_length_->start;
+  delete entry_length_;
+  entry_length_ = NULL;
+  in_fde_ = false;
+  return *this;
+}
+
+CFISection &CFISection::EncodedPointer(uint64_t address,
+                                       DwarfPointerEncoding encoding,
+                                       const EncodedPointerBases &bases) {
+  // Omitted data is extremely easy to emit.
+  if (encoding == dwarf2reader::DW_EH_PE_omit)
+    return *this;
+
+  // If (encoding & dwarf2reader::DW_EH_PE_indirect) != 0, then we assume
+  // that ADDRESS is the address at which the pointer is stored --- in
+  // other words, that bit has no effect on how we write the pointer.
+  encoding = DwarfPointerEncoding(encoding & ~dwarf2reader::DW_EH_PE_indirect);
+
+  // Find the base address to which this pointer is relative. The upper
+  // nybble of the encoding specifies this.
+  uint64_t base;
+  switch (encoding & 0xf0) {
+    case dwarf2reader::DW_EH_PE_absptr:  base = 0;                  break;
+    case dwarf2reader::DW_EH_PE_pcrel:   base = bases.cfi + Size(); break;
+    case dwarf2reader::DW_EH_PE_textrel: base = bases.text;         break;
+    case dwarf2reader::DW_EH_PE_datarel: base = bases.data;         break;
+    case dwarf2reader::DW_EH_PE_funcrel: base = fde_start_address_; break;
+    case dwarf2reader::DW_EH_PE_aligned: base = 0;                  break;
+    default: abort();
+  };
+
+  // Make ADDRESS relative. Yes, this is appropriate even for "absptr"
+  // values; see gcc/unwind-pe.h.
+  address -= base;
+
+  // Align the pointer, if required.
+  if ((encoding & 0xf0) == dwarf2reader::DW_EH_PE_aligned)
+    Align(AddressSize());
+
+  // Append ADDRESS to this section in the appropriate form. For the
+  // fixed-width forms, we don't need to differentiate between signed and
+  // unsigned encodings, because ADDRESS has already been extended to 64
+  // bits before it was passed to us.
+  switch (encoding & 0x0f) {
+    case dwarf2reader::DW_EH_PE_absptr:
+      Address(address);
+      break;
+
+    case dwarf2reader::DW_EH_PE_uleb128:
+      ULEB128(address);
+      break;
+
+    case dwarf2reader::DW_EH_PE_sleb128:
+      LEB128(address);
+      break;
+
+    case dwarf2reader::DW_EH_PE_udata2:
+    case dwarf2reader::DW_EH_PE_sdata2:
+      D16(address);
+      break;
+
+    case dwarf2reader::DW_EH_PE_udata4:
+    case dwarf2reader::DW_EH_PE_sdata4:
+      D32(address);
+      break;
+
+    case dwarf2reader::DW_EH_PE_udata8:
+    case dwarf2reader::DW_EH_PE_sdata8:
+      D64(address);
+      break;
+
+    default:
+      abort();
+  }
+
+  return *this;
+};
+
+const uint32_t CFISection::kDwarf64InitialLengthMarker;
+const uint32_t CFISection::kDwarf32CIEIdentifier;
+const uint64_t CFISection::kDwarf64CIEIdentifier;
+const uint32_t CFISection::kEHFrame32CIEIdentifier;
+const uint64_t CFISection::kEHFrame64CIEIdentifier;
+
+} // namespace google_breakpad