diff options
Diffstat (limited to 'toolkit/crashreporter/google-breakpad/src/common/dwarf/cfi_assembler.cc')
| -rw-r--r-- | toolkit/crashreporter/google-breakpad/src/common/dwarf/cfi_assembler.cc | 198 |
1 files changed, 0 insertions, 198 deletions
diff --git a/toolkit/crashreporter/google-breakpad/src/common/dwarf/cfi_assembler.cc b/toolkit/crashreporter/google-breakpad/src/common/dwarf/cfi_assembler.cc deleted file mode 100644 index dbc2efae6..000000000 --- a/toolkit/crashreporter/google-breakpad/src/common/dwarf/cfi_assembler.cc +++ /dev/null @@ -1,198 +0,0 @@ -// 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) { - 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); - 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 |