[ELF] - Linkerscript: implemented ADDR command.
ADDR(section)
Return the absolute address (the VMA) of the named section.
Used in the wild, eg.: https://searchcode.com/file/53617342/arch/x86/kernel/vmlinux.lds.S
Differential revision: https://reviews.llvm.org/D23913
llvm-svn: 280070
diff --git a/lld/ELF/LinkerScript.cpp b/lld/ELF/LinkerScript.cpp
index 16c3aef9..cd67d18 100644
--- a/lld/ELF/LinkerScript.cpp
+++ b/lld/ELF/LinkerScript.cpp
@@ -533,6 +533,16 @@
}
template <class ELFT>
+typename ELFT::uint
+LinkerScript<ELFT>::getOutputSectionAddress(StringRef Name) {
+ for (OutputSectionBase<ELFT> *Sec : *OutputSections)
+ if (Sec->getName() == Name)
+ return Sec->getVA();
+ error("undefined section " + Name);
+ return 0;
+}
+
+template <class ELFT>
typename ELFT::uint LinkerScript<ELFT>::getOutputSectionSize(StringRef Name) {
for (OutputSectionBase<ELFT> *Sec : *OutputSections)
if (Sec->getName() == Name)
@@ -1044,6 +1054,21 @@
}
}
+static uint64_t getSectionAddress(StringRef Name) {
+ switch (Config->EKind) {
+ case ELF32LEKind:
+ return Script<ELF32LE>::X->getOutputSectionAddress(Name);
+ case ELF32BEKind:
+ return Script<ELF32BE>::X->getOutputSectionAddress(Name);
+ case ELF64LEKind:
+ return Script<ELF64LE>::X->getOutputSectionAddress(Name);
+ case ELF64BEKind:
+ return Script<ELF64BE>::X->getOutputSectionAddress(Name);
+ default:
+ llvm_unreachable("unsupported target");
+ }
+}
+
static uint64_t getHeaderSize() {
switch (Config->EKind) {
case ELF32LEKind:
@@ -1154,6 +1179,12 @@
// Built-in functions are parsed here.
// https://sourceware.org/binutils/docs/ld/Builtin-Functions.html.
+ if (Tok == "ADDR") {
+ expect("(");
+ StringRef Name = next();
+ expect(")");
+ return [=](uint64_t Dot) { return getSectionAddress(Name); };
+ }
if (Tok == "ASSERT")
return readAssert();
if (Tok == "ALIGN") {