toolkit/crashreporter/google-breakpad/src/common/linux/elfutils.h@129ffea94266 (annotated)
toolkit/crashreporter/google-breakpad/src/common/linux/elfutils.h
Sat, 03 Jan 2015 20:18:00 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Sat, 03 Jan 2015 20:18:00 +0100
- branch
- TOR_BUG_3246
- changeset 7
- 129ffea94266
- permissions
- -rw-r--r--
Conditionally enable double key logic according to:
private browsing mode or privacy.thirdparty.isolate preference and
implement in GetCookieStringCommon and FindCookie where it counts...
With some reservations of how to convince FindCookie users to test
condition and pass a nullptr when disabling double key logic.
| michael@0 | 1 | // Copyright (c) 2012, Google Inc. |
| michael@0 | 2 | // All rights reserved. |
| michael@0 | 3 | // |
| michael@0 | 4 | // Redistribution and use in source and binary forms, with or without |
| michael@0 | 5 | // modification, are permitted provided that the following conditions are |
| michael@0 | 6 | // met: |
| michael@0 | 7 | // |
| michael@0 | 8 | // * Redistributions of source code must retain the above copyright |
| michael@0 | 9 | // notice, this list of conditions and the following disclaimer. |
| michael@0 | 10 | // * Redistributions in binary form must reproduce the above |
| michael@0 | 11 | // copyright notice, this list of conditions and the following disclaimer |
| michael@0 | 12 | // in the documentation and/or other materials provided with the |
| michael@0 | 13 | // distribution. |
| michael@0 | 14 | // * Neither the name of Google Inc. nor the names of its |
| michael@0 | 15 | // contributors may be used to endorse or promote products derived from |
| michael@0 | 16 | // this software without specific prior written permission. |
| michael@0 | 17 | // |
| michael@0 | 18 | // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| michael@0 | 19 | // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| michael@0 | 20 | // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| michael@0 | 21 | // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| michael@0 | 22 | // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| michael@0 | 23 | // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| michael@0 | 24 | // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| michael@0 | 25 | // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| michael@0 | 26 | // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| michael@0 | 27 | // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| michael@0 | 28 | // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| michael@0 | 29 | // |
| michael@0 | 30 | // elfutils.h: Utilities for dealing with ELF files. |
| michael@0 | 31 | // |
| michael@0 | 32 | |
| michael@0 | 33 | #ifndef COMMON_LINUX_ELFUTILS_H__ |
| michael@0 | 34 | #define COMMON_LINUX_ELFUTILS_H__ |
| michael@0 | 35 | |
| michael@0 | 36 | #include <elf.h> |
| michael@0 | 37 | #include <link.h> |
| michael@0 | 38 | #include <stdint.h> |
| michael@0 | 39 | |
| michael@0 | 40 | namespace google_breakpad { |
| michael@0 | 41 | |
| michael@0 | 42 | // Traits classes so consumers can write templatized code to deal |
| michael@0 | 43 | // with specific ELF bits. |
| michael@0 | 44 | struct ElfClass32 { |
| michael@0 | 45 | typedef Elf32_Addr Addr; |
| michael@0 | 46 | typedef Elf32_Ehdr Ehdr; |
| michael@0 | 47 | typedef Elf32_Nhdr Nhdr; |
| michael@0 | 48 | typedef Elf32_Phdr Phdr; |
| michael@0 | 49 | typedef Elf32_Shdr Shdr; |
| michael@0 | 50 | typedef Elf32_Half Half; |
| michael@0 | 51 | typedef Elf32_Off Off; |
| michael@0 | 52 | typedef Elf32_Word Word; |
| michael@0 | 53 | static const int kClass = ELFCLASS32; |
| michael@0 | 54 | static const size_t kAddrSize = sizeof(Elf32_Addr); |
| michael@0 | 55 | }; |
| michael@0 | 56 | |
| michael@0 | 57 | struct ElfClass64 { |
| michael@0 | 58 | typedef Elf64_Addr Addr; |
| michael@0 | 59 | typedef Elf64_Ehdr Ehdr; |
| michael@0 | 60 | typedef Elf64_Nhdr Nhdr; |
| michael@0 | 61 | typedef Elf64_Phdr Phdr; |
| michael@0 | 62 | typedef Elf64_Shdr Shdr; |
| michael@0 | 63 | typedef Elf64_Half Half; |
| michael@0 | 64 | typedef Elf64_Off Off; |
| michael@0 | 65 | typedef Elf64_Word Word; |
| michael@0 | 66 | static const int kClass = ELFCLASS64; |
| michael@0 | 67 | static const size_t kAddrSize = sizeof(Elf64_Addr); |
| michael@0 | 68 | }; |
| michael@0 | 69 | |
| michael@0 | 70 | bool IsValidElf(const void* elf_header); |
| michael@0 | 71 | int ElfClass(const void* elf_base); |
| michael@0 | 72 | |
| michael@0 | 73 | // Attempt to find a section named |section_name| of type |section_type| |
| michael@0 | 74 | // in the ELF binary data at |elf_mapped_base|. On success, returns true |
| michael@0 | 75 | // and sets |*section_start| to point to the start of the section data, |
| michael@0 | 76 | // and |*section_size| to the size of the section's data. If |elfclass| |
| michael@0 | 77 | // is not NULL, set |*elfclass| to the ELF file class. |
| michael@0 | 78 | bool FindElfSection(const void *elf_mapped_base, |
| michael@0 | 79 | const char *section_name, |
| michael@0 | 80 | uint32_t section_type, |
| michael@0 | 81 | const void **section_start, |
| michael@0 | 82 | int *section_size, |
| michael@0 | 83 | int *elfclass); |
| michael@0 | 84 | |
| michael@0 | 85 | // Internal helper method, exposed for convenience for callers |
| michael@0 | 86 | // that already have more info. |
| michael@0 | 87 | template<typename ElfClass> |
| michael@0 | 88 | const typename ElfClass::Shdr* |
| michael@0 | 89 | FindElfSectionByName(const char* name, |
| michael@0 | 90 | typename ElfClass::Word section_type, |
| michael@0 | 91 | const typename ElfClass::Shdr* sections, |
| michael@0 | 92 | const char* section_names, |
| michael@0 | 93 | const char* names_end, |
| michael@0 | 94 | int nsection); |
| michael@0 | 95 | |
| michael@0 | 96 | // Attempt to find the first segment of type |segment_type| in the ELF |
| michael@0 | 97 | // binary data at |elf_mapped_base|. On success, returns true and sets |
| michael@0 | 98 | // |*segment_start| to point to the start of the segment data, and |
| michael@0 | 99 | // and |*segment_size| to the size of the segment's data. If |elfclass| |
| michael@0 | 100 | // is not NULL, set |*elfclass| to the ELF file class. |
| michael@0 | 101 | bool FindElfSegment(const void *elf_mapped_base, |
| michael@0 | 102 | uint32_t segment_type, |
| michael@0 | 103 | const void **segment_start, |
| michael@0 | 104 | int *segment_size, |
| michael@0 | 105 | int *elfclass); |
| michael@0 | 106 | |
| michael@0 | 107 | // Convert an offset from an Elf header into a pointer to the mapped |
| michael@0 | 108 | // address in the current process. Takes an extra template parameter |
| michael@0 | 109 | // to specify the return type to avoid having to dynamic_cast the |
| michael@0 | 110 | // result. |
| michael@0 | 111 | template<typename ElfClass, typename T> |
| michael@0 | 112 | const T* |
| michael@0 | 113 | GetOffset(const typename ElfClass::Ehdr* elf_header, |
| michael@0 | 114 | typename ElfClass::Off offset); |
| michael@0 | 115 | |
| michael@0 | 116 | } // namespace google_breakpad |
| michael@0 | 117 | |
| michael@0 | 118 | #endif // COMMON_LINUX_ELFUTILS_H__ |
