[ELF] - Make __start_/__stop_<section_name> symbols STV_PROTECTED

There are no reasons for them to be STV_DEFAULT,
recently bfd did the same change.

Differential revision: https://reviews.llvm.org/D44566

git-svn-id: https://llvm.org/svn/llvm-project/lld/trunk@327983 91177308-0d34-0410-b5e6-96231b3b80d8

Author: George Rimar

ELF/Writer.cpp

@@ -1629,8 +1629,8 @@ void Writer<ELFT>::addStartStopSymbols(OutputSection *Sec) {
   StringRef S = Sec->Name;
   if (!isValidCIdentifier(S))
     return;
-  addOptionalRegular(Saver.save("__start_" + S), Sec, 0, STV_DEFAULT);
-  addOptionalRegular(Saver.save("__stop_" + S), Sec, -1, STV_DEFAULT);
+  addOptionalRegular(Saver.save("__start_" + S), Sec, 0, STV_PROTECTED);
+  addOptionalRegular(Saver.save("__stop_" + S), Sec, -1, STV_PROTECTED);
 }
 
 static bool needsPtLoad(OutputSection *Sec) {

test/ELF/startstop-shared.s

@@ -11,18 +11,30 @@
         .quad __start_bar
         .section bar,"a"
 
-// Test that we are able to hide the symbol.
-// CHECK:      R_X86_64_RELATIVE - 0x[[ADDR:.*]]
+// CHECK:      Relocations [
+// CHECK-NEXT:   Section {{.*}} .rela.dyn {
+// CHECK-NEXT:     R_X86_64_RELATIVE
+// CHECK-NEXT:     R_X86_64_RELATIVE
+// CHECK-NEXT:   }
+// CHECK-NEXT: ]
 
-// By default the symbol is visible and we need a dynamic reloc.
-// CHECK:  R_X86_64_64 __start_foo 0x0
+// Test that we are able to hide the symbol.
+// By default the symbol is protected.
 
 // CHECK:      Name: __start_bar
-// CHECK-NEXT: Value: 0x[[ADDR]]
+// CHECK-NEXT: Value:
 // CHECK-NEXT: Size:
 // CHECK-NEXT: Binding: Local
+// CHECK-NEXT: Type: None
+// CHECK-NEXT: Other [
+// CHECK-NEXT:   STV_HIDDEN
+// CHECK-NEXT: ]
 
 // CHECK:      Name: __start_foo
 // CHECK-NEXT: Value:
 // CHECK-NEXT: Size:
 // CHECK-NEXT: Binding: Global
+// CHECK-NEXT: Type: None
+// CHECK-NEXT: Other [
+// CHECK-NEXT:   STV_PROTECTED
+// CHECK-NEXT: ]

test/ELF/startstop.s

@@ -19,13 +19,12 @@
 // DISASM:    1013:       90      nop
 // DISASM:    1014:       90      nop
 
-
 // SYMBOL:      Relocations [
 // SYMBOL-NEXT:   Section ({{.*}}) .rela.dyn {
-// SYMBOL-NEXT:     0x2010 R_X86_64_64 __stop_zed1 0x0
-// SYMBOL-NEXT:     0x2018 R_X86_64_64 __stop_zed1 0x1
-// SYMBOL-NEXT:     0x2000 R_X86_64_64 __stop_zed2 0x0
-// SYMBOL-NEXT:     0x2008 R_X86_64_64 __stop_zed2 0x1
+// SYMBOL-NEXT:     R_X86_64_RELATIVE
+// SYMBOL-NEXT:     R_X86_64_RELATIVE
+// SYMBOL-NEXT:     R_X86_64_RELATIVE
+// SYMBOL-NEXT:     R_X86_64_RELATIVE
 // SYMBOL-NEXT:   }
 // SYMBOL-NEXT: ]
 
@@ -45,20 +44,20 @@
 // SYMBOL: Symbol {
 // SYMBOL:   Name: __stop_foo
 // SYMBOL:   Value: 0x1012
-// STMBOL:   STV_HIDDEN
+// SYMBOL:   STV_HIDDEN
 // SYMBOL:   Section: foo
 // SYMBOL: }
 
 // SYMBOL: Symbol {
 // SYMBOL:   Name: __stop_zed1
 // SYMBOL:   Value: 0x2010
-// STMBOL:   Other: 0
+// SYMBOL:   STV_PROTECTED
 // SYMBOL:   Section: zed1
 // SYMBOL: }
 // SYMBOL: Symbol {
 // SYMBOL:   Name: __stop_zed2
 // SYMBOL:   Value: 0x2020
-// STMBOL:   Other: 0
+// SYMBOL:   STV_PROTECTED
 // SYMBOL:   Section: zed2
 // SYMBOL: }