[ELF] Linkerscript: support hidden symbols assignments
This add support for HIDDEN command which can be used to define
a symbol that will be hidden and won't be exported.
Differential Revision: https://reviews.llvm.org/D23534
llvm-svn: 278770
diff --git a/lld/ELF/LinkerScript.cpp b/lld/ELF/LinkerScript.cpp
index d5748f8..dd9ef6a 100644
--- a/lld/ELF/LinkerScript.cpp
+++ b/lld/ELF/LinkerScript.cpp
@@ -602,7 +602,7 @@
InputSectionDescription *readInputSectionRules();
unsigned readPhdrType();
SortKind readSortKind();
- SymbolAssignment *readProvide(bool Hidden);
+ SymbolAssignment *readProvideHidden(bool Provide, bool Hidden);
SymbolAssignment *readProvideOrAssignment(StringRef Tok);
Expr readAlign();
void readSort();
@@ -969,10 +969,10 @@
return { uint8_t(V >> 24), uint8_t(V >> 16), uint8_t(V >> 8), uint8_t(V) };
}
-SymbolAssignment *ScriptParser::readProvide(bool Hidden) {
+SymbolAssignment *ScriptParser::readProvideHidden(bool Provide, bool Hidden) {
expect("(");
SymbolAssignment *Cmd = readAssignment(next());
- Cmd->Provide = true;
+ Cmd->Provide = Provide;
Cmd->Hidden = Hidden;
expect(")");
expect(";");
@@ -985,9 +985,11 @@
Cmd = readAssignment(Tok);
expect(";");
} else if (Tok == "PROVIDE") {
- Cmd = readProvide(false);
+ Cmd = readProvideHidden(true, false);
+ } else if (Tok == "HIDDEN") {
+ Cmd = readProvideHidden(false, true);
} else if (Tok == "PROVIDE_HIDDEN") {
- Cmd = readProvide(true);
+ Cmd = readProvideHidden(true, true);
}
return Cmd;
}