[llvm-objdump] Fix jumptable detection when disassembling Mach-O binaries

- Add LC_SEGMENT_64 handling in getSectionsAndSymbols to be able to find the base segment address from 64-bit Mach-O binaries.
- Add "data in code" detection into the !symbolTableWorked case, extract it into a separate function.
- Fix uninitialized variable usage on BaseSegmentAddress (initialize to 0).
- Add test.

Differential Revision: https://reviews.llvm.org/D65491

llvm-svn: 367578

1 files changed, 45 insertions, 0 deletions

diff --git a/llvm/test/tools/llvm-objdump/macho-data-in-code.ll b/llvm/test/tools/llvm-objdump/macho-data-in-code.ll
new file mode 100644
index 00000000000..57877da09f3
--- /dev/null
+++ b/llvm/test/tools/llvm-objdump/macho-data-in-code.ll
@@ -0,0 +1,45 @@
+; RUN: llc -mtriple x86_64-apple-darwin -filetype=obj -O0 %s -o %t.o
+; RUN: llvm-objdump -macho -disassemble -no-show-raw-insn %t.o | FileCheck %s
+
+; CHECK: .long {{[0-9]+}}	@ KIND_JUMP_TABLE32
+; CHECK: .long {{[0-9]+}}	@ KIND_JUMP_TABLE32
+; CHECK: .long {{[0-9]+}}	@ KIND_JUMP_TABLE32
+; CHECK: .long {{[0-9]+}}	@ KIND_JUMP_TABLE32
+; CHECK-NOT: invalid instruction encoding
+; CHECK-NOT: <unknown>
+
+; ModuleID = '-'
+target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
+target triple = "x86_64-apple-macosx10.12.0"
+
+; Function Attrs: noinline nounwind optnone ssp uwtable
+define void @switchfunc(i32 %i) {
+  switch i32 %i, label %out [
+    i32 0, label %case1
+    i32 1, label %case2
+    i32 2, label %case3
+    i32 3, label %case4
+  ]
+
+case1:
+  call void @foo()
+  br label %out
+
+case2:
+  call void @bar()
+  br label %out
+
+case3:
+  call void @foo()
+  br label %out
+
+case4:
+  call void @bar()
+  br label %out
+
+out:
+  ret void
+}
+
+declare void @foo()
+declare void @bar()