[ObjectYAML] Basic support for chained fixups.

Add basic binary support for chained fixups. This allows basic tests
with chained fixups without trying to create a format for them until the
work on the Object library is considered finished.

Reviewed By: pete

Differential Revision: https://reviews.llvm.org/D134250

1 files changed, 227 insertions, 0 deletions

diff --git a/llvm/test/ObjectYAML/MachO/chained-fixups.yaml b/llvm/test/ObjectYAML/MachO/chained-fixups.yaml
new file mode 100644
index 0000000..a9d025c
--- /dev/null
+++ b/llvm/test/ObjectYAML/MachO/chained-fixups.yaml
@@ -0,0 +1,227 @@
+--- !mach-o
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+  FunctionStarts:  [ 0x3FB0 ]
+  ChainedFixups:   [ 0x0, 0x0, 0x0, 0x0, 0x20, 0x0, 0x0, 0x0, 0x30, 0x0,
+                     0x0, 0x0, 0x30, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
+                     0x1, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
+                     0x0, 0x0, 0x3, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
+                     0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
+                     0x0, 0x0, 0x0, 0x0, 0x0, 0x0 ]
+...
+
+# RUN: yaml2obj %s | obj2yaml | FileCheck %s
+
+# CHECK:      cmd:             LC_DYLD_CHAINED_FIXUPS
+# CHECK-NEXT: cmdsize:         16
+# CHECK-NEXT: dataoff:         [[#CHAINED_FIXUPS_OFF:]]
+# CHECK-NEXT: datasize:        [[#CHAINED_FIXUPS_SIZE: 56]]
+
+# CHECK:      cmd:             LC_DYLD_EXPORTS_TRIE
+# CHECK-NEXT: cmdsize:         16
+# CHECK-NEXT: dataoff:         [[#EXPORTS_TRIE_OFF: CHAINED_FIXUPS_OFF + CHAINED_FIXUPS_SIZE]]
+# CHECK-NEXT: datasize:        48
+
+## TODO: Need D134571 to check for export trie in LC_DYLD_EXPORTS_TRIE.
+
+# CHECK: ChainedFixups:
+# CHECK-SAME: [ 0x0, 0x0, 0x0, 0x0, 0x20, 0x0, 0x0, 0x0, 0x30, 0x0,
+# CHECK-NEXT:   0x0, 0x0, 0x30, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
+# CHECK-NEXT:   0x1, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
+# CHECK-NEXT:   0x0, 0x0, 0x3, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
+# CHECK-NEXT:   0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
+# CHECK-NEXT:   0x0, 0x0, 0x0, 0x0, 0x0, 0x0 ]