[PATCH] D14153: [ELF2] R_X86_64_64 plt relocation implemented.

[George Rimar via llvm-commits]

grimar created this revision.
grimar added reviewers: ruiu, rafael.
grimar added subscribers: grimar, llvm-commits.

This little patch is a final point in fix for https://llvm.org/bugs/show_bug.cgi?id=25175.

It`s make sample from issue description to work with -O0 optimization flag (with -O0 it generates R_X86_64_64 plt relocation).
Previous patch that implemented copy relocations (http://reviews.llvm.org/D14090) fixed -O1,2,3 cases.

http://reviews.llvm.org/D14153

Files:
  ELF/Target.cpp
  test/elf2/dynamic-reloc-index.s
  test/elf2/dynamic-reloc.s

Index: test/elf2/dynamic-reloc.s
===================================================================
--- test/elf2/dynamic-reloc.s
+++ test/elf2/dynamic-reloc.s
@@ -9,7 +9,7 @@
 // CHECK:      Index: 1
 // CHECK-NEXT: Name: .dynsym
 
-// CHECK:      Name: .rela.dyn
+// CHECK:      Name: .rela.plt
 // CHECK-NEXT: Type: SHT_RELA
 // CHECK-NEXT: Flags [
 // CHECK-NEXT:   SHF_ALLOC
@@ -28,24 +28,25 @@
 // CHECK-NEXT:   SHF_ALLOC
 // CHECK-NEXT:   SHF_EXECINSTR
 // CHECK-NEXT: ]
-// CHECK-NEXT: Address: [[ADDR:.*]]
+// CHECK-NEXT: Address: 0x11000
 
 // CHECK:      Relocations [
-// CHECK-NEXT:   Section ({{.*}}) .rela.dyn {
+// CHECK-NEXT:   Section ({{.*}}) .rela.plt {
 // CHECK-NEXT:     Relocation {
-// CHECK-NEXT:       Offset: [[ADDR]]
-// CHECK-NEXT:       Type: R_X86_64_64
+// CHECK-NEXT:       Offset: 0x120C8
+// CHECK-NEXT:       Type: R_X86_64_JUMP_SLOT
 // CHECK-NEXT:       Symbol: bar
-// CHECK-NEXT:       Addend: 0x42
+// CHECK-NEXT:       Addend: 0x0
 // CHECK-NEXT:     }
 // CHECK-NEXT:   }
 // CHECK-NEXT: ]
 
 // CHECK: DynamicSection [
 // CHECK-NEXT:  Tag                Type                 Name/Value
-// CHECK-NEXT:  0x0000000000000007 RELA                 [[RELAADDR]]
-// CHECK-NEXT:  0x0000000000000008 RELASZ               [[RELASIZE]] (bytes)
-// CHECK-NEXT:  0x0000000000000009 RELAENT              24 (bytes)
+// CHECK-NEXT:  0x0000000000000017 JMPREL               0x10200
+// CHECK-NEXT:  0x0000000000000002 PLTRELSZ             24 (bytes)
+// CHECK-NEXT:  0x0000000000000003 PLTGOT               0x120B0
+// CHECK-NEXT:  0x0000000000000014 PLTREL               RELA
 // CHECK-NEXT:  0x0000000000000006 SYMTAB
 // CHECK-NEXT:  0x000000000000000B SYMENT               24 (bytes)
 // CHECK-NEXT:  0x0000000000000005 STRTAB
@@ -55,7 +56,6 @@
 // CHECK-NEXT:  0x0000000000000000 NULL                 0x0
 // CHECK-NEXT: ]
 
-
 .global _start
 _start:
 .quad bar + 0x42
Index: test/elf2/dynamic-reloc-index.s
===================================================================
--- test/elf2/dynamic-reloc-index.s
+++ test/elf2/dynamic-reloc-index.s
@@ -7,8 +7,8 @@
 // We used to record the wrong symbol index for this test
 
 // CHECK:      Relocations [
-// CHECK-NEXT:   Section ({{.*}}) .rela.dyn {
-// CHECK-NEXT:     0x11000 R_X86_64_64 bar 0x0
+// CHECK-NEXT:   Section ({{.*}}) .rela.plt {
+// CHECK-NEXT:     0x120C8 R_X86_64_JUMP_SLOT bar 0x0
 // CHECK-NEXT:   }
 // CHECK-NEXT: ]
 
Index: ELF/Target.cpp
===================================================================
--- ELF/Target.cpp
+++ ELF/Target.cpp
@@ -265,6 +265,8 @@
   switch (Type) {
   case R_X86_64_32:
     return R_X86_64_32;
+  case R_X86_64_64:
+    return R_X86_64_64;
   case R_X86_64_PC32:
   case R_X86_64_PLT32:
     return R_X86_64_PC32;
@@ -280,6 +282,7 @@
   default:
     return false;
   case R_X86_64_32:
+  case R_X86_64_64:
   case R_X86_64_PC32:
     // This relocation is defined to have a value of (S + A - P).
     // The problems start when a non PIC program calls a function in a shared


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