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ld/macho: add all missing load commands

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The ld/macho code currently understands a subset of the mach-o load
commands. I've encountered one of these in the wild in a Go-produced
binary, which tripped up the Go linker because its switch statement
expects its list of load commands to be exhaustive; the rest I've
added for the sake of completion.

The ruby-macho library is a good non-Darwin header resource for these:
https://github.com/homebrew/ruby-macho

Fixes #25908

Change-Id: Ib54c065d27e87d8726a9870df05a2bae24828b98
GitHub-Last-Rev: 655e3f488a
GitHub-Pull-Request: golang/go#25906
Reviewed-on: https://go-review.googlesource.com/119115
Reviewed-by: Ian Lance Taylor <iant@golang.org>
This commit is contained in:
Misty De Meo 2018-06-15 18:15:50 +00:00 committed by Ian Lance Taylor
parent 534ddf741f
commit 1a92cdbfc1
2 changed files with 52 additions and 27 deletions
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77
src/cmd/link/internal/ld/macho.go
View File

@ -103,32 +103,57 @@ const (
)
const (
LC_SEGMENT = 0x1
LC_SYMTAB = 0x2
LC_UNIXTHREAD = 0x5
LC_DYSYMTAB = 0xb
LC_LOAD_DYLIB = 0xc
LC_ID_DYLIB = 0xd
LC_LOAD_DYLINKER = 0xe
LC_PREBOUND_DYLIB = 0x10
LC_LOAD_WEAK_DYLIB = 0x18
LC_SEGMENT_64 = 0x19
LC_UUID = 0x1b
LC_RPATH = 0x8000001c
LC_CODE_SIGNATURE = 0x1d
LC_SEGMENT_SPLIT_INFO = 0x1e
LC_REEXPORT_DYLIB = 0x8000001f
LC_ENCRYPTION_INFO = 0x21
LC_DYLD_INFO = 0x22
LC_DYLD_INFO_ONLY = 0x80000022
LC_VERSION_MIN_MACOSX = 0x24
LC_VERSION_MIN_IPHONEOS = 0x25
LC_FUNCTION_STARTS = 0x26
LC_MAIN = 0x80000028
LC_DATA_IN_CODE = 0x29
LC_SOURCE_VERSION = 0x2A
LC_DYLIB_CODE_SIGN_DRS = 0x2B
LC_ENCRYPTION_INFO_64 = 0x2C
LC_SEGMENT = 0x1
LC_SYMTAB = 0x2
LC_SYMSEG = 0x3
LC_THREAD = 0x4
LC_UNIXTHREAD = 0x5
LC_LOADFVMLIB = 0x6
LC_IDFVMLIB = 0x7
LC_IDENT = 0x8
LC_FVMFILE = 0x9
LC_PREPAGE = 0xa
LC_DYSYMTAB = 0xb
LC_LOAD_DYLIB = 0xc
LC_ID_DYLIB = 0xd
LC_LOAD_DYLINKER = 0xe
LC_ID_DYLINKER = 0xf
LC_PREBOUND_DYLIB = 0x10
LC_ROUTINES = 0x11
LC_SUB_FRAMEWORK = 0x12
LC_SUB_UMBRELLA = 0x13
LC_SUB_CLIENT = 0x14
LC_SUB_LIBRARY = 0x15
LC_TWOLEVEL_HINTS = 0x16
LC_PREBIND_CKSUM = 0x17
LC_LOAD_WEAK_DYLIB = 0x18
LC_SEGMENT_64 = 0x19
LC_ROUTINES_64 = 0x1a
LC_UUID = 0x1b
LC_RPATH = 0x8000001c
LC_CODE_SIGNATURE = 0x1d
LC_SEGMENT_SPLIT_INFO = 0x1e
LC_REEXPORT_DYLIB = 0x8000001f
LC_LAZY_LOAD_DYLIB = 0x20
LC_ENCRYPTION_INFO = 0x21
LC_DYLD_INFO = 0x22
LC_DYLD_INFO_ONLY = 0x80000022
LC_LOAD_UPWARD_DYLIB = 0x80000023
LC_VERSION_MIN_MACOSX = 0x24
LC_VERSION_MIN_IPHONEOS = 0x25
LC_FUNCTION_STARTS = 0x26
LC_DYLD_ENVIRONMENT = 0x27
LC_MAIN = 0x80000028
LC_DATA_IN_CODE = 0x29
LC_SOURCE_VERSION = 0x2A
LC_DYLIB_CODE_SIGN_DRS = 0x2B
LC_ENCRYPTION_INFO_64 = 0x2C
LC_LINKER_OPTION = 0x2D
LC_LINKER_OPTIMIZATION_HINT = 0x2E
LC_VERSION_MIN_TVOS = 0x2F
LC_VERSION_MIN_WATCHOS = 0x30
LC_VERSION_NOTE = 0x31
LC_BUILD_VERSION = 0x32
)
const (

2
src/cmd/link/internal/ld/macho_combine_dwarf.go
View File

@ -235,7 +235,7 @@ func machoCombineDwarf(inexe, dsym, outexe string, buildmode BuildMode) (bool, e
err = machoUpdateLoadCommand(reader, &linkEditDataCmd{}, "DataOff")
case LC_ENCRYPTION_INFO, LC_ENCRYPTION_INFO_64:
err = machoUpdateLoadCommand(reader, &encryptionInfoCmd{}, "CryptOff")
case macho.LoadCmdDylib, macho.LoadCmdThread, macho.LoadCmdUnixThread, LC_PREBOUND_DYLIB, LC_UUID, LC_VERSION_MIN_MACOSX, LC_VERSION_MIN_IPHONEOS, LC_SOURCE_VERSION, LC_MAIN, LC_LOAD_DYLINKER, LC_LOAD_WEAK_DYLIB, LC_REEXPORT_DYLIB, LC_RPATH, LC_ID_DYLIB:
case macho.LoadCmdDylib, macho.LoadCmdThread, macho.LoadCmdUnixThread, LC_PREBOUND_DYLIB, LC_UUID, LC_VERSION_MIN_MACOSX, LC_VERSION_MIN_IPHONEOS, LC_SOURCE_VERSION, LC_MAIN, LC_LOAD_DYLINKER, LC_LOAD_WEAK_DYLIB, LC_REEXPORT_DYLIB, LC_RPATH, LC_ID_DYLIB, LC_SYMSEG, LC_LOADFVMLIB, LC_IDFVMLIB, LC_IDENT, LC_FVMFILE, LC_PREPAGE, LC_ID_DYLINKER, LC_ROUTINES, LC_SUB_FRAMEWORK, LC_SUB_UMBRELLA, LC_SUB_CLIENT, LC_SUB_LIBRARY, LC_TWOLEVEL_HINTS, LC_PREBIND_CKSUM, LC_ROUTINES_64, LC_LAZY_LOAD_DYLIB, LC_LOAD_UPWARD_DYLIB, LC_DYLD_ENVIRONMENT, LC_LINKER_OPTION, LC_LINKER_OPTIMIZATION_HINT, LC_VERSION_MIN_TVOS, LC_VERSION_MIN_WATCHOS, LC_VERSION_NOTE, LC_BUILD_VERSION:
// Nothing to update
default:
err = fmt.Errorf("Unknown load command 0x%x (%s)\n", int(cmd.Cmd), cmd.Cmd)