[llvm-objcopy][MachO] Add support for LC_THREAD/LC_UNIXTHREAD

Add support for LC_THREAD/LC_UNIXTHREAD
(these load commands can be copied over without any modifications).

Test plan: make check-all

Differential revision: https://reviews.llvm.org/D101384

diff --git a/llvm/test/tools/llvm-objcopy/MachO/lc-thread.test b/llvm/test/tools/llvm-objcopy/MachO/lc-thread.test
new file mode 100644 (file)
index 0000000..5da0bd6
--- /dev/null
+++ b/llvm/test/tools/llvm-objcopy/MachO/lc-thread.test
@@ -0,0 +1,44 @@
+## This test verifies that the load commands LC_THREAD/LC_UNIXTHREAD
+## are copied correctly.
+
+# RUN: yaml2obj -D LC_NAME=LC_THREAD %s -o  %t.lc_thread.exe
+# RUN: llvm-objcopy %t.lc_thread.exe %t.lc_thread.exe.copy
+# RUN: cmp %t.lc_thread.exe %t.lc_thread.exe.copy
+
+# RUN: yaml2obj -D LC_NAME=LC_UNIXTHREAD %s -o %t.lc_unixthread.exe
+# RUN: llvm-objcopy %t.lc_unixthread.exe %t.lc_unixthread.exe.copy
+# RUN: cmp %t.lc_unixthread.exe %t.lc_unixthread.exe.copy
+
+--- !mach-o
+IsLittleEndian:  true
+FileHeader:
+  magic:           0xFEEDFACF
+  cputype:         0x1000007
+  cpusubtype:      0x3
+  filetype:        0x2
+  ncmds:           1
+  sizeofcmds:      184
+  flags:           0x18085
+  reserved:        0x0
+LoadCommands:
+  - cmd:             [[LC_NAME]]
+    cmdsize:         184
+    PayloadBytes:    [ 0x4, 0x0, 0x0, 0x0, 0x2A, 0x0, 0x0, 0x0, 0x0, 0x0,
+                       0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
+                       0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
+                       0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
+                       0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
+                       0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
+                       0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
+                       0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
+                       0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
+                       0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
+                       0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
+                       0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
+                       0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
+                       0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x5C, 0xB, 0x0, 0x0,
+                       0x1, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
+                       0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
+                       0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
+                       0x0, 0x0, 0x0, 0x0, 0x0, 0x0 ]
+...

diff --git a/llvm/tools/llvm-objcopy/MachO/MachOLayoutBuilder.cpp b/llvm/tools/llvm-objcopy/MachO/MachOLayoutBuilder.cpp
index 8e2bf36..c6cbfee 100644 (file)
--- a/llvm/tools/llvm-objcopy/MachO/MachOLayoutBuilder.cpp
+++ b/llvm/tools/llvm-objcopy/MachO/MachOLayoutBuilder.cpp
@@ -371,6 +371,8 @@ Error MachOLayoutBuilder::layoutTail(uint64_t Offset) {
     case MachO::LC_LOAD_WEAK_DYLIB:
     case MachO::LC_UUID:
     case MachO::LC_SOURCE_VERSION:
+    case MachO::LC_THREAD:
+    case MachO::LC_UNIXTHREAD:
       // Nothing to update.
       break;
     default: