rust-lang/rust
1
0
Fork 0
Code Issues Pull Requests Actions 1 Packages Projects Releases Wiki Activity

Add pie as another relocation-model value

Browse Source
This commit is contained in:
Marcel Hlopko
2021-09-10 15:11:56 +02:00
parent 497ee321af
commit 198d90786b
11 changed files with 147 additions and 8 deletions
Download Patch File Download Diff File Expand all files Collapse all files

7
compiler/rustc_codegen_llvm/src/context.rs
View File

@@ -190,11 +190,14 @@ pub unsafe fn create_module(
let llvm_target = SmallCStr::new(&sess.target.llvm_target);
llvm::LLVMRustSetNormalizedTarget(llmod, llvm_target.as_ptr());
if sess.relocation_model() == RelocModel::Pic {
let reloc_model = sess.relocation_model();
if matches!(reloc_model, RelocModel::Pic | RelocModel::Pie) {
llvm::LLVMRustSetModulePICLevel(llmod);
// PIE is potentially more effective than PIC, but can only be used in executables.
// If all our outputs are executables, then we can relax PIC to PIE.
if sess.crate_types().iter().all(|ty| *ty == CrateType::Executable) {
if reloc_model == RelocModel::Pie
|| sess.crate_types().iter().all(|ty| *ty == CrateType::Executable)
{
llvm::LLVMRustSetModulePIELevel(llmod);
}
}