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- // Copyright (c) 2011 The Chromium Authors. All rights reserved.
- // Use of this source code is governed by a BSD-style license that can be
- // found in the LICENSE file.
- #include "courgette/disassembler_win32_x86.h"
- #include <algorithm>
- #include "base/check.h"
- #include "courgette/assembly_program.h"
- #include "courgette/courgette.h"
- #include "courgette/rel32_finder_x86.h"
- #if COURGETTE_HISTOGRAM_TARGETS
- #include <iostream>
- #endif
- namespace courgette {
- DisassemblerWin32X86::DisassemblerWin32X86(const uint8_t* start, size_t length)
- : DisassemblerWin32(start, length) {}
- RVA DisassemblerWin32X86::PointerToTargetRVA(const uint8_t* p) const {
- return Address32ToRVA(Read32LittleEndian(p));
- }
- RVA DisassemblerWin32X86::Address32ToRVA(uint32_t address) const {
- if (address < image_base() || address >= image_base() + size_of_image_)
- return kNoRVA;
- return static_cast<RVA>(address - image_base());
- }
- CheckBool DisassemblerWin32X86::EmitAbs(Label* label,
- InstructionReceptor* receptor) const {
- return receptor->EmitAbs32(label);
- }
- void DisassemblerWin32X86::ParseRel32RelocsFromSection(const Section* section) {
- // TODO(sra): use characteristic.
- bool isCode = strcmp(section->name, ".text") == 0;
- if (!isCode)
- return;
- FileOffset start_file_offset = section->file_offset_of_raw_data;
- // |virtual_size < size_of_raw_data| is possible. In this case, disassembly
- // should not proceed beyond |virtual_size|, so rel32 location RVAs remain
- // translatable to file offsets.
- FileOffset end_file_offset =
- start_file_offset +
- std::min(section->virtual_size, section->size_of_raw_data);
- const uint8_t* start_pointer = FileOffsetToPointer(start_file_offset);
- const uint8_t* end_pointer = FileOffsetToPointer(end_file_offset);
- RVA start_rva = FileOffsetToRVA(start_file_offset);
- RVA end_rva = start_rva + section->virtual_size;
- Rel32FinderX86 finder(
- base_relocation_table().address_,
- base_relocation_table().address_ + base_relocation_table().size_);
- finder.Find(start_pointer, end_pointer, start_rva, end_rva, abs32_locations_);
- finder.SwapRel32Locations(&rel32_locations_);
- #if COURGETTE_HISTOGRAM_TARGETS
- DCHECK(rel32_target_rvas_.empty());
- finder.SwapRel32TargetRVAs(&rel32_target_rvas_);
- #endif
- }
- } // namespace courgette
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