ARM: support FK_SecRel_2 relocations on WoA

This adds FK_SecRel_2 relocation support to ARM.  This enables the building of
object files for armv7-windows-msvc which enables CodeView line tables for
debugging as opposed to armv7-windows-itanium which currently uses DWARF.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@208273 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Target/ARM/MCTargetDesc/ARMAsmBackend.cpp b/lib/Target/ARM/MCTargetDesc/ARMAsmBackend.cpp
index 900c7ca5b4233aab81c044eff3729ff59ffc84ab..93ec46df07f396e59aebf41b1359e877dc549fae 100644 (file)
--- a/lib/Target/ARM/MCTargetDesc/ARMAsmBackend.cpp
+++ b/lib/Target/ARM/MCTargetDesc/ARMAsmBackend.cpp
@@ -344,6 +344,8 @@ static unsigned adjustFixupValue(const MCFixup &Fixup, uint64_t Value,
   case FK_Data_2:
   case FK_Data_4:
     return Value;
+  case FK_SecRel_2:
+    return Value;
   case FK_SecRel_4:
     return Value;
   case ARM::fixup_arm_movt_hi16:
@@ -674,6 +676,8 @@ static unsigned getFixupKindNumBytes(unsigned Kind) {
   case ARM::fixup_t2_movw_lo16:
     return 4;
 
+  case FK_SecRel_2:
+    return 2;
   case FK_SecRel_4:
     return 4;
   }

diff --git a/lib/Target/ARM/MCTargetDesc/ARMWinCOFFObjectWriter.cpp b/lib/Target/ARM/MCTargetDesc/ARMWinCOFFObjectWriter.cpp
index e3e6802fd3cee648d2c9be169a61377ff694bc7c..ba9df6e962c944873563e782e89517895137cfef 100644 (file)
--- a/lib/Target/ARM/MCTargetDesc/ARMWinCOFFObjectWriter.cpp
+++ b/lib/Target/ARM/MCTargetDesc/ARMWinCOFFObjectWriter.cpp
@@ -49,6 +49,8 @@ unsigned ARMWinCOFFObjectWriter::getRelocType(const MCValue &Target,
     default:
       return COFF::IMAGE_REL_ARM_ADDR32;
     }
+  case FK_SecRel_2:
+    return COFF::IMAGE_REL_ARM_SECTION;
   case FK_SecRel_4:
     return COFF::IMAGE_REL_ARM_SECREL;
   case ARM::fixup_t2_condbranch:

diff --git a/test/MC/ARM/coff-debugging-secrel.ll b/test/MC/ARM/coff-debugging-secrel.ll
index 928f4b119579eab082b46848d3fdef2e6be80149..a3db4e5f3d799b6119dc9c41e39c580589abc880 100644 (file)
--- a/test/MC/ARM/coff-debugging-secrel.ll
+++ b/test/MC/ARM/coff-debugging-secrel.ll
@@ -1,5 +1,8 @@
 ; RUN: llc -mtriple thumbv7--windows-itanium -filetype obj -o - %s \
-; RUN:     | llvm-readobj -r - | FileCheck %s
+; RUN:     | llvm-readobj -r - | FileCheck %s -check-prefix CHECK-ITANIUM
+
+; RUN: llc -mtriple thumbv7--windows-msvc -filetype obj -o - %s \
+; RUN:    | llvm-readobj -r - | Filecheck %s -check-prefix CHECK-MSVC
 
 ; ModuleID = '/Users/compnerd/work/llvm/test/MC/ARM/reduced.c'
 target datalayout = "e-m:e-p:32:32-i1:8:32-i8:8:32-i16:16:32-i64:64-v128:64:128-a:0:32-n32-S64"
@@ -25,17 +28,24 @@ entry:
 !9 = metadata !{i32 2, metadata !"Dwarf Version", i32 4}
 !10 = metadata !{i32 1, metadata !"Debug Info Version", i32 1}
 
-; CHECK: Relocations [
-; CHECK:   Section {{.*}} .debug_info {
-; CHECK:     0x6 IMAGE_REL_ARM_SECREL .debug_abbrev
-; CHECK:     0xC IMAGE_REL_ARM_SECREL .debug_str
-; CHECK:     0x12 IMAGE_REL_ARM_SECREL .debug_str
-; CHECK:     0x16 IMAGE_REL_ARM_SECREL .debug_line
-; CHECK:     0x1A IMAGE_REL_ARM_SECREL .debug_str
-; CHECK:     0x27 IMAGE_REL_ARM_SECREL .debug_str
-; CHECK:   }
-; CHECK:   Section {{.*}}.debug_pubnames {
-; CHECK:     0x6 IMAGE_REL_ARM_SECREL .debug_info
-; CHECK:   }
-; CHECK: ]
+; CHECK-ITANIUM: Relocations [
+; CHECK-ITANIUM:   Section {{.*}} .debug_info {
+; CHECK-ITANIUM:     0x6 IMAGE_REL_ARM_SECREL .debug_abbrev
+; CHECK-ITANIUM:     0xC IMAGE_REL_ARM_SECREL .debug_str
+; CHECK-ITANIUM:     0x12 IMAGE_REL_ARM_SECREL .debug_str
+; CHECK-ITANIUM:     0x16 IMAGE_REL_ARM_SECREL .debug_line
+; CHECK-ITANIUM:     0x1A IMAGE_REL_ARM_SECREL .debug_str
+; CHECK-ITANIUM:     0x27 IMAGE_REL_ARM_SECREL .debug_str
+; CHECK-ITANIUM:   }
+; CHECK-ITANIUM:   Section {{.*}}.debug_pubnames {
+; CHECK-ITANIUM:     0x6 IMAGE_REL_ARM_SECREL .debug_info
+; CHECK-ITANIUM:   }
+; CHECK-ITANIUM: ]
+
+; CHECK-MSVC: Relocations [
+; CHECK-MSVC:   Section {{.*}} .debug$S {
+; CHECK-MSVC:     0xC IMAGE_REL_ARM_SECREL function
+; CHECK-MSVC:     0x10 IMAGE_REL_ARM_SECTION function
+; CHECK-MSVC:   }
+; CHECK-MSVC: ]