summaryrefslogtreecommitdiffstats
diff options
context:
space:
mode:
-rw-r--r--lld/ELF/Writer.cpp28
1 files changed, 17 insertions, 11 deletions
diff --git a/lld/ELF/Writer.cpp b/lld/ELF/Writer.cpp
index 0c33b439e5f..fe5c7e6fd45 100644
--- a/lld/ELF/Writer.cpp
+++ b/lld/ELF/Writer.cpp
@@ -56,6 +56,7 @@ private:
void maybeAddThunks();
void sortInputSections();
void finalizeSections();
+ void checkExecuteOnly();
void setReservedSymbolSections();
std::vector<PhdrEntry *> createPhdrs();
@@ -458,6 +459,7 @@ template <class ELFT> void Writer<ELFT>::run() {
// to the string table, and add entries to .got and .plt.
// finalizeSections does that.
finalizeSections();
+ checkExecuteOnly();
if (errorCount())
return;
@@ -483,10 +485,9 @@ template <class ELFT> void Writer<ELFT>::run() {
setPhdrs();
- if (Config->Relocatable) {
+ if (Config->Relocatable)
for (OutputSection *Sec : OutputSections)
Sec->Addr = 0;
- }
if (Config->CheckSections)
checkSections();
@@ -1654,15 +1655,6 @@ template <class ELFT> void Writer<ELFT>::finalizeSections() {
if (auto *Sec = dyn_cast<OutputSection>(Base))
OutputSections.push_back(Sec);
- // Ensure data sections are not mixed with executable sections when
- // -execute-only is used.
- if (Config->ExecuteOnly)
- for (OutputSection *OS : OutputSections)
- if (OS->Flags & SHF_EXECINSTR)
- for (InputSection *IS : getInputSections(OS))
- if (!(IS->Flags & SHF_EXECINSTR))
- error("-execute-only does not support intermingling data and code");
-
// Prefer command line supplied address over other constraints.
for (OutputSection *Sec : OutputSections) {
auto I = Config->SectionStartMap.find(Sec->Name);
@@ -1756,6 +1748,20 @@ template <class ELFT> void Writer<ELFT>::finalizeSections() {
Sec->finalize<ELFT>();
}
+// Ensure data sections are not mixed with executable sections when
+// -execute-only is used. -execute-only is a feature to make pages executable
+// but not readable, and the feature is currently supported only on AArch64.
+template <class ELFT> void Writer<ELFT>::checkExecuteOnly() {
+ if (!Config->ExecuteOnly)
+ return;
+
+ for (OutputSection *OS : OutputSections)
+ if (OS->Flags & SHF_EXECINSTR)
+ for (InputSection *IS : getInputSections(OS))
+ if (!(IS->Flags & SHF_EXECINSTR))
+ error("-execute-only does not support intermingling data and code");
+}
+
// The linker is expected to define SECNAME_start and SECNAME_end
// symbols for a few sections. This function defines them.
template <class ELFT> void Writer<ELFT>::addStartEndSymbols() {
OpenPOWER on IntegriCloud