8bd8dd16e2
I am planning to upstream MachOObjectFile code to support Darwin chained fixups. In order to test the new parser features we need a way to produce correct (and incorrect) chained fixups. Right now the only tool that can produce them is the Darwin linker. To avoid having to check in binary files, this patch allows obj2yaml to print a hexdump of the raw LINKEDIT and DATA segment, which both allows to bootstrap the parser and enables us to easily create malformed inputs to test error handling in the parser. This patch adds two new options to obj2yaml: -raw-data-segment -raw-linkedit-segment Differential Revision: https://reviews.llvm.org/D113234
185 lines
5.8 KiB
YAML
185 lines
5.8 KiB
YAML
# Test that obj2yaml + yaml2obj can round-trip mach-o executables with
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# raw __LINKEDIT segments.
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#
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# RUN: yaml2obj %s | obj2yaml --raw-segment=data --raw-segment=linkedit | FileCheck %s
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#
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# This file was produced using:
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# echo "int ext;" > a.c
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# xcrun --sdk iphoneos clang -target arm64-apple-ios15.1 -o a.o a.c -c
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# xcrun --sdk iphoneos clang -target arm64-apple-ios15.1 -dynamiclib a.o -o liba.dylib -install_name @executable_path/liba.dylib
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# echo "extern int ext;" > b.c
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# echo "int padding;" >> b.c
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# echo "int *p = &ext + 4;" >> b.c
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# xcrun --sdk iphoneos clang -target arm64-apple-ios15.1 -o b.o b.c -c
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# xcrun --sdk iphoneos clang -target arm64-apple-ios15.1 -dynamiclib b.o -o libfixups.dylib -install_name @executable_path/libfixups.dylib -L. -la
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#
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# CHECK: - sectname: __data
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# CHECK: segname: __DATA
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# CHECK: content: '0000001000000080'
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# CHECK: __LINKEDIT: 0000000020000000480000004C000000010000000100000000000000000000000300000000000000100000000000000018000000004006000040000000000000000000000100000001020000005F6578740000000000000000015F700006040080800100000000000000000000000000020000000F02000000400000000000000500000001000001000000000000000020005F70005F65787400000000000000
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--- !mach-o
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FileHeader:
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magic: 0xFEEDFACF
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cputype: 0x100000C
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cpusubtype: 0x0
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filetype: 0x6
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ncmds: 16
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sizeofcmds: 816
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flags: 0x100085
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reserved: 0x0
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LoadCommands:
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- cmd: LC_SEGMENT_64
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cmdsize: 152
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segname: __TEXT
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vmaddr: 0
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vmsize: 16384
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fileoff: 0
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filesize: 16384
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maxprot: 5
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initprot: 5
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nsects: 1
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flags: 0
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Sections:
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- sectname: __text
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segname: __TEXT
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addr: 0x4000
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size: 0
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offset: 0x4000
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align: 0
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reloff: 0x0
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nreloc: 0
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flags: 0x80000400
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reserved1: 0x0
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reserved2: 0x0
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reserved3: 0x0
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content: ''
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- cmd: LC_SEGMENT_64
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cmdsize: 152
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segname: __DATA
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vmaddr: 16384
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vmsize: 16384
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fileoff: 16384
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filesize: 16384
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maxprot: 3
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initprot: 3
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nsects: 1
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flags: 0
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Sections:
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- sectname: __data
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segname: __DATA
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addr: 0x4000
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size: 8
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offset: 0x4000
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align: 3
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reloff: 0x0
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nreloc: 0
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flags: 0x0
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reserved1: 0x0
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reserved2: 0x0
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reserved3: 0x0
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content: '0000001000000080'
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- cmd: LC_SEGMENT_64
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cmdsize: 72
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segname: __LINKEDIT
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vmaddr: 32768
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vmsize: 16384
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fileoff: 32768
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filesize: 160
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maxprot: 1
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initprot: 1
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nsects: 0
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flags: 0
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- cmd: LC_ID_DYLIB
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cmdsize: 64
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dylib:
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name: 24
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timestamp: 1
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current_version: 0
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compatibility_version: 0
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Content: '@executable_path/libfixups.dylib'
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ZeroPadBytes: 8
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- cmd: LC_DYLD_CHAINED_FIXUPS
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cmdsize: 16
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dataoff: 32768
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datasize: 88
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- cmd: LC_DYLD_EXPORTS_TRIE
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cmdsize: 16
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dataoff: 32856
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datasize: 16
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- cmd: LC_SYMTAB
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cmdsize: 24
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symoff: 32880
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nsyms: 2
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stroff: 32912
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strsize: 16
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- cmd: LC_DYSYMTAB
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cmdsize: 80
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ilocalsym: 0
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nlocalsym: 0
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iextdefsym: 0
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nextdefsym: 1
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iundefsym: 1
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nundefsym: 1
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tocoff: 0
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ntoc: 0
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modtaboff: 0
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nmodtab: 0
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extrefsymoff: 0
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nextrefsyms: 0
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indirectsymoff: 0
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nindirectsyms: 0
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extreloff: 0
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nextrel: 0
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locreloff: 0
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nlocrel: 0
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- cmd: LC_UUID
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cmdsize: 24
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uuid: 56F7BCE0-C1A7-38E3-A90D-742D8E3D5FA9
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- cmd: LC_BUILD_VERSION
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cmdsize: 32
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platform: 2
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minos: 983296
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sdk: 983552
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ntools: 1
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Tools:
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- tool: 3
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version: 46596096
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- cmd: LC_SOURCE_VERSION
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cmdsize: 16
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version: 0
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- cmd: LC_ENCRYPTION_INFO_64
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cmdsize: 24
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cryptoff: 16384
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cryptsize: 0
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cryptid: 0
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pad: 0
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- cmd: LC_LOAD_DYLIB
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cmdsize: 56
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dylib:
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name: 24
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timestamp: 2
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current_version: 0
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compatibility_version: 0
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Content: '@executable_path/liba.dylib'
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ZeroPadBytes: 5
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- cmd: LC_LOAD_DYLIB
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cmdsize: 56
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dylib:
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name: 24
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timestamp: 2
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current_version: 85917696
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compatibility_version: 65536
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Content: '/usr/lib/libSystem.B.dylib'
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ZeroPadBytes: 6
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- cmd: LC_FUNCTION_STARTS
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cmdsize: 16
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dataoff: 32872
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datasize: 8
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- cmd: LC_DATA_IN_CODE
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cmdsize: 16
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dataoff: 32880
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datasize: 0
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__LINKEDIT: 0000000020000000480000004C000000010000000100000000000000000000000300000000000000100000000000000018000000004006000040000000000000000000000100000001020000005F6578740000000000000000015F700006040080800100000000000000000000000000020000000F02000000400000000000000500000001000001000000000000000020005F70005F65787400000000000000
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...
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