[ELF] - Linkerscript: implemented ALIGN modificatior of output sections.
Output section description can contain ALIGN modificator:
https://sourceware.org/binutils/docs/ld/Output-Section-Description.html#Output-Section-Description
Patch implements it.
Differential revision: https://reviews.llvm.org/D22674
llvm-svn: 276780
diff --git a/lld/ELF/LinkerScript.cpp b/lld/ELF/LinkerScript.cpp
index a9ca646..3889f10 100644
--- a/lld/ELF/LinkerScript.cpp
+++ b/lld/ELF/LinkerScript.cpp
@@ -226,6 +226,9 @@
if (Cmd->AddrExpr)
Dot = Cmd->AddrExpr(Dot);
+ if (Cmd->AlignExpr)
+ Sec->updateAlignment(Cmd->AlignExpr(Dot));
+
if ((Sec->getFlags() & SHF_TLS) && Sec->getType() == SHT_NOBITS) {
uintX_t TVA = Dot + ThreadBssOffset;
TVA = alignTo(TVA, Sec->getAlignment());
@@ -433,6 +436,7 @@
std::vector<StringRef> readOutputSectionPhdrs();
unsigned readPhdrType();
void readProvide(bool Hidden);
+ void readAlign(OutputSectionCommand *Cmd);
Expr readExpr();
Expr readExpr1(Expr Lhs, int MinPrec);
@@ -671,6 +675,12 @@
expect(")");
}
+void ScriptParser::readAlign(OutputSectionCommand *Cmd) {
+ expect("(");
+ Cmd->AlignExpr = readExpr();
+ expect(")");
+}
+
void ScriptParser::readOutputSectionDescription(StringRef OutSec) {
OutputSectionCommand *Cmd = new OutputSectionCommand(OutSec);
Opt.Commands.emplace_back(Cmd);
@@ -682,6 +692,9 @@
expect(":");
+ if (skip("ALIGN"))
+ readAlign(Cmd);
+
// Parse constraints.
if (skip("ONLY_IF_RO"))
Cmd->Constraint = ConstraintKind::ReadOnly;