From: Rui Ueyama <ruiu@google.com>
Date: Tue, 28 Jul 2015 22:56:02 +0000 (+0000)
Subject: COFF: _tls_used is __tls_used on x86.
X-Git-Tag: studio-1.4~1338
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=506f6d1ae1015667077a56d5a112ae509c2228ed;p=platform%2Fupstream%2Fllvm.git

COFF: _tls_used is __tls_used on x86.

llvm-svn: 243495
---

diff --git a/lld/COFF/SymbolTable.cpp b/lld/COFF/SymbolTable.cpp
index d12c052..b476f69 100644
--- a/lld/COFF/SymbolTable.cpp
+++ b/lld/COFF/SymbolTable.cpp
@@ -274,6 +274,12 @@ Symbol *SymbolTable::find(StringRef Name) {
   return It->second;
 }
 
+Symbol *SymbolTable::findUnderscore(StringRef Name) {
+  if (Config->Machine == I386)
+    return find(("_" + Name).str());
+  return find(Name);
+}
+
 StringRef SymbolTable::findByPrefix(StringRef Prefix) {
   for (auto Pair : Symtab) {
     StringRef Name = Pair.first;
diff --git a/lld/COFF/SymbolTable.h b/lld/COFF/SymbolTable.h
index 479dce6..b465e50 100644
--- a/lld/COFF/SymbolTable.h
+++ b/lld/COFF/SymbolTable.h
@@ -56,6 +56,7 @@ public:
 
   // Returns a symbol for a given name. Returns a nullptr if not found.
   Symbol *find(StringRef Name);
+  Symbol *findUnderscore(StringRef Name);
 
   // Occasionally we have to resolve an undefined symbol to its
   // mangled symbol. This function tries to find a mangled name
diff --git a/lld/COFF/Writer.cpp b/lld/COFF/Writer.cpp
index 377dd2b..aca44ea 100644
--- a/lld/COFF/Writer.cpp
+++ b/lld/COFF/Writer.cpp
@@ -520,13 +520,13 @@ template <typename PEHeaderTy> void Writer::writeHeader() {
     Dir[EXCEPTION_TABLE].RelativeVirtualAddress = Sec->getRVA();
     Dir[EXCEPTION_TABLE].Size = Sec->getVirtualSize();
   }
-  if (Symbol *Sym = Symtab->find("_tls_used")) {
+  if (Symbol *Sym = Symtab->findUnderscore("_tls_used")) {
     if (Defined *B = dyn_cast<Defined>(Sym->Body)) {
       Dir[TLS_TABLE].RelativeVirtualAddress = B->getRVA();
       Dir[TLS_TABLE].Size = 40;
     }
   }
-  if (Symbol *Sym = Symtab->find("__load_config_used")) {
+  if (Symbol *Sym = Symtab->findUnderscore("_load_config_used")) {
     if (Defined *B = dyn_cast<Defined>(Sym->Body)) {
       Dir[LOAD_CONFIG_TABLE].RelativeVirtualAddress = B->getRVA();
       Dir[LOAD_CONFIG_TABLE].Size = 64;
diff --git a/lld/test/COFF/tls32.test b/lld/test/COFF/tls32.test
new file mode 100644
index 0000000..74bb7a8
--- /dev/null
+++ b/lld/test/COFF/tls32.test
@@ -0,0 +1,43 @@
+# RUN: yaml2obj < %s > %t.obj
+# RUN: lld -flavor link2 /out:%t.exe /entry:main %t.obj
+# RUN: llvm-readobj -file-headers %t.exe | FileCheck %s
+
+# CHECK: TLSTableRVA: 0x1000
+# CHECK: TLSTableSize: 0x28
+
+---
+header:
+  Machine:         IMAGE_FILE_MACHINE_I386
+  Characteristics: []
+sections:
+  - Name:            .text
+    Characteristics: [ IMAGE_SCN_CNT_CODE, IMAGE_SCN_MEM_EXECUTE, IMAGE_SCN_MEM_READ ]
+    Alignment:       4
+    SectionData:     00000000
+symbols:
+  - Name:            .text
+    Value:           0
+    SectionNumber:   1
+    SimpleType:      IMAGE_SYM_TYPE_NULL
+    ComplexType:     IMAGE_SYM_DTYPE_NULL
+    StorageClass:    IMAGE_SYM_CLASS_STATIC
+    SectionDefinition:
+      Length:          4
+      NumberOfRelocations: 0
+      NumberOfLinenumbers: 0
+      CheckSum:        0
+      Number:          0
+      Selection:       IMAGE_COMDAT_SELECT_ANY
+  - Name:            _main
+    Value:           0
+    SectionNumber:   1
+    SimpleType:      IMAGE_SYM_TYPE_NULL
+    ComplexType:     IMAGE_SYM_DTYPE_FUNCTION
+    StorageClass:    IMAGE_SYM_CLASS_EXTERNAL
+  - Name:            __tls_used
+    Value:           0
+    SectionNumber:   1
+    SimpleType:      IMAGE_SYM_TYPE_NULL
+    ComplexType:     IMAGE_SYM_DTYPE_FUNCTION
+    StorageClass:    IMAGE_SYM_CLASS_EXTERNAL
+...