ld/macho: add all missing load commands

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: 655e3f488a4c1a89896a40edb0e1f715a5d3f734
GitHub-Pull-Request: golang/go#25906
Reviewed-on: https://go-review.googlesource.com/119115
Reviewed-by: Ian Lance Taylor <iant@golang.org>

diff --git a/src/cmd/link/internal/ld/macho.go b/src/cmd/link/internal/ld/macho.go
index d804dc83b3428af7977c9321a07e9387f8bd6ed2..8315de5152d044746e81c55a9984a75c6f6969e7 100644 (file)
--- a/src/cmd/link/internal/ld/macho.go
+++ b/src/cmd/link/internal/ld/macho.go
@@ -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 (

diff --git a/src/cmd/link/internal/ld/macho_combine_dwarf.go b/src/cmd/link/internal/ld/macho_combine_dwarf.go
index 82228faa8d1a27cde05c34cd0e1d6391d517de61..06aa3c6f4c9e3a702420e3ba83ea49e1231c2ce1 100644 (file)
--- a/src/cmd/link/internal/ld/macho_combine_dwarf.go
+++ b/src/cmd/link/internal/ld/macho_combine_dwarf.go
@@ -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)