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alexander-shaposhnikovalexander-shaposhnikov
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[llvm-objcopy] Add ability to copy MachO object files
This diff implements first bits for copying (without modification) MachO object files. Test plan: make check-all Differential revision: https://reviews.llvm.org/D54674 llvm-svn: 352944
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16 files changed

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‎llvm/test/tools/llvm-objcopy/MachO/Inputs/macho.32.s

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.section __TEXT,__text,regular,pure_instructions
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.build_version macos, 10, 14
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.globl __Z1fi ## -- Begin function _Z1fi
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.p2align 4, 0x90
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__Z1fi: ## @_Z1fi
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.cfi_startproc
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## %bb.0:
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pushl %ebp
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.cfi_def_cfa_offset 8
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.cfi_offset %ebp, -8
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movl %esp, %ebp
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.cfi_def_cfa_register %ebp
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pushl %eax
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calll L0$pb
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L0$pb:
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popl %eax
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movl 8(%ebp), %ecx
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movl _x-L0$pb(%eax), %eax
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addl 8(%ebp), %eax
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movl %ecx, -4(%ebp) ## 4-byte Spill
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addl $4, %esp
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popl %ebp
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retl
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.cfi_endproc
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## -- End function
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.globl _main ## -- Begin function main
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.p2align 4, 0x90
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_main: ## @main
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.cfi_startproc
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## %bb.0:
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pushl %ebp
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.cfi_def_cfa_offset 8
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.cfi_offset %ebp, -8
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movl %esp, %ebp
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.cfi_def_cfa_register %ebp
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subl $24, %esp
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movl $2, %eax
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movl $0, -4(%ebp)
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movl $2, (%esp)
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movl %eax, -8(%ebp) ## 4-byte Spill
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calll __Z1fi
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addl $24, %esp
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popl %ebp
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retl
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.cfi_endproc
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## -- End function
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.section __DATA,__data
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.globl _x ## @x
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.p2align 2
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_x:
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.long 1 ## 0x1
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.subsections_via_symbols

‎llvm/test/tools/llvm-objcopy/MachO/Inputs/macho.64.s

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.section __TEXT,__text,regular,pure_instructions
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.build_version macos, 10, 14
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.globl __Z1fi ## -- Begin function _Z1fi
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.p2align 4, 0x90
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__Z1fi: ## @_Z1fi
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.cfi_startproc
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## %bb.0:
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pushq %rbp
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.cfi_def_cfa_offset 16
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.cfi_offset %rbp, -16
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movq %rsp, %rbp
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.cfi_def_cfa_register %rbp
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movl %edi, -4(%rbp)
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movl _x(%rip), %edi
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addl -4(%rbp), %edi
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movl %edi, %eax
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popq %rbp
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retq
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.cfi_endproc
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## -- End function
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.globl _main ## -- Begin function main
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.p2align 4, 0x90
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_main: ## @main
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.cfi_startproc
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## %bb.0:
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pushq %rbp
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.cfi_def_cfa_offset 16
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.cfi_offset %rbp, -16
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movq %rsp, %rbp
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.cfi_def_cfa_register %rbp
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subq $16, %rsp
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movl $2, %edi
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movl $0, -4(%rbp)
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callq __Z1fi
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addq $16, %rsp
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popq %rbp
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retq
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.cfi_endproc
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## -- End function
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.section __DATA,__data
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.globl _x ## @x
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.p2align 2
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_x:
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.long 1 ## 0x1
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.subsections_via_symbols

‎llvm/test/tools/llvm-objcopy/MachO/basic-big-endian-32-copy.test

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# RUN: yaml2obj %s > %t
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# RUN: llvm-objcopy %t %t2
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# RUN: cmp %t %t2
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--- !mach-o
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IsLittleEndian: false
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FileHeader:
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magic: 0xFEEDFACE
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cputype: 0x00000007
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cpusubtype: 0x00000003
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filetype: 0x00000001
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ncmds: 4
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sizeofcmds: 380
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flags: 0x00002000
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LoadCommands:
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- cmd: LC_SEGMENT
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cmdsize: 260
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segname: ''
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vmaddr: 0
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vmsize: 184
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fileoff: 408
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filesize: 184
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maxprot: 7
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initprot: 7
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nsects: 3
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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: 0x0000000000000000
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size: 61
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offset: 0x00000198
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align: 4
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reloff: 0x00000250
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nreloc: 1
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flags: 0x80000400
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reserved1: 0x00000000
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reserved2: 0x00000000
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reserved3: 0x00000000
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- sectname: __compact_unwind
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segname: __LD
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addr: 0x0000000000000040
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size: 40
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offset: 0x000001D8
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align: 2
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reloff: 0x00000258
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nreloc: 2
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flags: 0x02000000
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reserved1: 0x00000000
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reserved2: 0x00000000
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reserved3: 0x00000000
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- sectname: __eh_frame
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segname: __TEXT
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addr: 0x0000000000000068
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size: 80
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offset: 0x00000200
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align: 2
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reloff: 0x00000000
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nreloc: 0
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flags: 0x6800000B
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reserved1: 0x00000000
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reserved2: 0x00000000
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reserved3: 0x00000000
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- cmd: LC_VERSION_MIN_MACOSX
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cmdsize: 16
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version: 658688
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sdk: 0
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- cmd: LC_SYMTAB
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cmdsize: 24
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symoff: 616
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nsyms: 2
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stroff: 640
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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: 2
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iundefsym: 2
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nundefsym: 0
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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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LinkEditData:
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NameList:
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- n_strx: 1
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n_type: 0x0F
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n_sect: 1
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n_desc: 0
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n_value: 0
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- n_strx: 8
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n_type: 0x0F
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n_sect: 1
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n_desc: 0
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n_value: 32
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StringTable:
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- ''
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- __Z1fv
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- _main
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- ''
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- ''
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...

‎llvm/test/tools/llvm-objcopy/MachO/basic-big-endian-64-copy.test

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# RUN: yaml2obj %s > %t
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# RUN: llvm-objcopy %t %t2
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# RUN: cmp %t %t2
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--- !mach-o
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IsLittleEndian: false
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FileHeader:
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magic: 0xFEEDFACF
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cputype: 0x01000007
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cpusubtype: 0x00000003
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filetype: 0x00000001
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ncmds: 4
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sizeofcmds: 512
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flags: 0x00002000
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reserved: 0x00000000
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LoadCommands:
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- cmd: LC_SEGMENT_64
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cmdsize: 392
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segname: ''
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vmaddr: 0
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vmsize: 240
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fileoff: 544
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filesize: 240
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maxprot: 7
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initprot: 7
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nsects: 4
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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: 0x0000000000000000
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size: 93
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offset: 0x00000220
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align: 4
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reloff: 0x00000310
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nreloc: 3
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flags: 0x80000400
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reserved1: 0x00000000
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reserved2: 0x00000000
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reserved3: 0x00000000
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- sectname: __cstring
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segname: __TEXT
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addr: 0x000000000000005D
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size: 48
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offset: 0x0000027D
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align: 0
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reloff: 0x00000000
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nreloc: 0
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flags: 0x00000002
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reserved1: 0x00000000
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reserved2: 0x00000000
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reserved3: 0x00000000
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- sectname: __compact_unwind
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segname: __LD
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addr: 0x0000000000000090
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size: 32
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offset: 0x000002B0
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align: 3
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reloff: 0x00000328
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nreloc: 1
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flags: 0x02000000
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reserved1: 0x00000000
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reserved2: 0x00000000
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reserved3: 0x00000000
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- sectname: __eh_frame
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segname: __TEXT
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addr: 0x00000000000000B0
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size: 64
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offset: 0x000002D0
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align: 3
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reloff: 0x00000000
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nreloc: 0
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flags: 0x6800000B
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reserved1: 0x00000000
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reserved2: 0x00000000
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reserved3: 0x00000000
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- cmd: LC_VERSION_MIN_MACOSX
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cmdsize: 16
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version: 658432
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sdk: 0
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- cmd: LC_SYMTAB
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cmdsize: 24
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symoff: 816
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nsyms: 2
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stroff: 848
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strsize: 36
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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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LinkEditData:
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NameList:
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- n_strx: 24
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n_type: 0x0F
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n_sect: 1
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n_desc: 0
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n_value: 0
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- n_strx: 1
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n_type: 0x01
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n_sect: 0
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n_desc: 0
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n_value: 0
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StringTable:
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- ''
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- _compilerrt_abort_impl
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- ___absvdi2
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- ''
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...

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