[llvm-commits] [llvm] r115454 - in /llvm/trunk: lib/MC/ELFObjectWriter.cpp test/MC/ELF/pic-diff.s

[Rafael Espindola]

Author: rafael
Date: Sat Oct  2 19:46:57 2010
New Revision: 115454

URL: http://llvm.org/viewvc/llvm-project?rev=115454&view=rev
Log:
Implement a very basic PIC case.

Added:
    llvm/trunk/test/MC/ELF/pic-diff.s
Modified:
    llvm/trunk/lib/MC/ELFObjectWriter.cpp

Modified: llvm/trunk/lib/MC/ELFObjectWriter.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/MC/ELFObjectWriter.cpp?rev=115454&r1=115453&r2=115454&view=diff
==============================================================================
--- llvm/trunk/lib/MC/ELFObjectWriter.cpp (original)
+++ llvm/trunk/lib/MC/ELFObjectWriter.cpp Sat Oct  2 19:46:57 2010
@@ -535,6 +535,13 @@
     MCSymbolData &SD = Asm.getSymbolData(*Symbol);
     MCFragment *F = SD.getFragment();
 
+    if (const MCSymbolRefExpr *RefB = Target.getSymB()) {
+      const MCSymbol &SymbolB = RefB->getSymbol();
+      MCSymbolData &SDB = Asm.getSymbolData(SymbolB);
+      IsPCRel = true;
+      Value += Fixup.getOffset() - Layout.getSymbolAddress(&SDB);
+    }
+
     // Check that this case has already been fully resolved before we get
     // here.
     if (Symbol->isDefined() && !SD.isExternal() &&

Added: llvm/trunk/test/MC/ELF/pic-diff.s
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/MC/ELF/pic-diff.s?rev=115454&view=auto
==============================================================================
--- llvm/trunk/test/MC/ELF/pic-diff.s (added)
+++ llvm/trunk/test/MC/ELF/pic-diff.s Sat Oct  2 19:46:57 2010
@@ -0,0 +1,25 @@
+// RUN: llvm-mc -filetype=obj -triple x86_64-pc-linux-gnu %s -o - | elf-dump  | FileCheck %s
+
+// CHECK:         # Symbol 5
+// CHECK-NEXT:    (('st_name', 5) # 'baz'
+// CHECK-NEXT:     ('st_bind', 1)
+// CHECK-NEXT:     ('st_type', 0)
+// CHECK-NEXT:     ('st_other', 0)
+// CHECK-NEXT:     ('st_shndx', 0)
+// CHECK-NEXT:     ('st_value', 0)
+// CHECK-NEXT:     ('st_size', 0)
+// CHECK-NEXT:    ),
+
+// CHECK:       ('_relocations', [
+// CHECK-NEXT:    # Relocation 0
+// CHECK-NEXT:    (('r_offset', 12)
+// CHECK-NEXT:     ('r_sym', 5)
+// CHECK-NEXT:     ('r_type', 2)
+// CHECK-NEXT:     ('r_addend', 8)
+// CHECK-NEXT:    ),
+// CHECK-NEXT:   ])
+
+.zero 4
+foo:
+.zero 8
+.long baz - foo