Fix absolute recording of differences of symbols in two sections. Reduced from ctor_d...

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@121152 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/MC/MachObjectWriter.cpp b/lib/MC/MachObjectWriter.cpp
index d31ecef27a8411e7a78bf12962f45ae6b25d8e19..1eb7c1ceead92349015da3b66c3a88f18321d21b 100644 (file)
--- a/lib/MC/MachObjectWriter.cpp
+++ b/lib/MC/MachObjectWriter.cpp
@@ -884,6 +884,17 @@ public:
       // FIXME: Currently, these are never generated (see code below). I cannot
       // find a case where they are actually emitted.
       Type = macho::RIT_Vanilla;
+    } else if (SD->getSymbol().isVariable()) {
+      const MCExpr *Value = SD->getSymbol().getVariableValue();
+      int64_t Res;
+      bool isAbs = Value->EvaluateAsAbsolute(Res, Layout, SectionAddress);
+      if (isAbs) {
+        FixedValue = Res;
+        return;
+      } else {
+        report_fatal_error("unsupported relocation of variable '" +
+                           SD->getSymbol().getName() + "'");
+      }
     } else {
       // Check whether we need an external or internal relocation.
       if (doesSymbolRequireExternRelocation(SD)) {

diff --git a/test/MC/MachO/diff-with-two-sections.s b/test/MC/MachO/diff-with-two-sections.s
new file mode 100644 (file)
index 0000000..b5e0988
--- /dev/null
+++ b/test/MC/MachO/diff-with-two-sections.s
@@ -0,0 +1,64 @@
+// RUN: llvm-mc -triple i386-apple-darwin9 %s -filetype=obj -o - | macho-dump --dump-section-data | FileCheck %s
+
+       .section        __TEXT,__text,regular,pure_instructions
+Leh_func_begin0:
+       .section        __TEXT,__eh_frame,coalesced,no_toc+strip_static_syms+live_support
+Ltmp3:
+Ltmp4 = Leh_func_begin0-Ltmp3
+       .long   Ltmp4
+
+// CHECK:      ('cputype', 7)
+// CHECK-NEXT: ('cpusubtype', 3)
+// CHECK-NEXT: ('filetype', 1)
+// CHECK-NEXT: ('num_load_commands', 1)
+// CHECK-NEXT: ('load_commands_size', 192)
+// CHECK-NEXT: ('flag', 0)
+// CHECK-NEXT: ('load_commands', [
+// CHECK-NEXT:   # Load Command 0
+// CHECK-NEXT:  (('command', 1)
+// CHECK-NEXT:   ('size', 192)
+// CHECK-NEXT:   ('segment_name', '\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00')
+// CHECK-NEXT:   ('vm_addr', 0)
+// CHECK-NEXT:   ('vm_size', 4)
+// CHECK-NEXT:   ('file_offset', 220)
+// CHECK-NEXT:   ('file_size', 4)
+// CHECK-NEXT:   ('maxprot', 7)
+// CHECK-NEXT:   ('initprot', 7)
+// CHECK-NEXT:   ('num_sections', 2)
+// CHECK-NEXT:   ('flags', 0)
+// CHECK-NEXT:   ('sections', [
+// CHECK-NEXT:     # Section 0
+// CHECK-NEXT:    (('section_name', '__text\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00')
+// CHECK-NEXT:     ('segment_name', '__TEXT\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00')
+// CHECK-NEXT:     ('address', 0)
+// CHECK-NEXT:     ('size', 0)
+// CHECK-NEXT:     ('offset', 220)
+// CHECK-NEXT:     ('alignment', 0)
+// CHECK-NEXT:     ('reloc_offset', 0)
+// CHECK-NEXT:     ('num_reloc', 0)
+// CHECK-NEXT:     ('flags', 0x80000000)
+// CHECK-NEXT:     ('reserved1', 0)
+// CHECK-NEXT:     ('reserved2', 0)
+// CHECK-NEXT:    ),
+// CHECK-NEXT:   ('_relocations', [
+// CHECK-NEXT:   ])
+// CHECK-NEXT:   ('_section_data', '')
+// CHECK-NEXT:     # Section 1
+// CHECK-NEXT:    (('section_name', '__eh_frame\x00\x00\x00\x00\x00\x00')
+// CHECK-NEXT:     ('segment_name', '__TEXT\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00')
+// CHECK-NEXT:     ('address', 0)
+// CHECK-NEXT:     ('size', 4)
+// CHECK-NEXT:     ('offset', 220)
+// CHECK-NEXT:     ('alignment', 0)
+// CHECK-NEXT:     ('reloc_offset', 0)
+// CHECK-NEXT:     ('num_reloc', 0)
+// CHECK-NEXT:     ('flags', 0x6800000b)
+// CHECK-NEXT:     ('reserved1', 0)
+// CHECK-NEXT:     ('reserved2', 0)
+// CHECK-NEXT:    ),
+// CHECK-NEXT:   ('_relocations', [
+// CHECK-NEXT:   ])
+// CHECK-NEXT:   ('_section_data', '00000000')
+// CHECK-NEXT:   ])
+// CHECK-NEXT:  ),
+// CHECK-NEXT: ])