bjoernager/rust
bjoernager/rust
1
Fork 0
Code Issues Pull requests Activity

Improve generating Custom entry function

Browse source 
This commit is aimed at making compiler generated entry functions
(Basically just C `main` right now) more generic so other targets can do
similar things for custom entry. This was initially implemented as part
of https://github.com/rust-lang/rust/pull/100316.

Currently, this moves the entry function name and Call convention to the
target spec.

Signed-off-by: Ayush Singh <ayushsingh1325@gmail.com>
This commit is contained in:
Ayush Singh 2022-11-05 14:36:38 +05:30
parent 5b3e909075
commit 9f0a8620bd
No known key found for this signature in database
GPG key ID: 05CEF5C789E55A74
7 changed files with 135 additions and 20 deletions
Download patch file Download diff file Expand all files Collapse all files

10
compiler/rustc_codegen_llvm/src/context.rs
View file

@ -570,8 +570,14 @@ impl<'ll, 'tcx> MiscMethods<'tcx> for CodegenCx<'ll, 'tcx> {
}
fn declare_c_main(&self, fn_type: Self::Type) -> Option<Self::Function> {
if self.get_declared_value("main").is_none() {
Some(self.declare_cfn("main", llvm::UnnamedAddr::Global, fn_type))
let entry_name = self.sess().target.entry_name.as_ref();
if self.get_declared_value(entry_name).is_none() {
Some(self.declare_entry_fn(
entry_name,
self.sess().target.entry_abi.into(),
llvm::UnnamedAddr::Global,
fn_type,
))
} else {
// If the symbol already exists, it is an error: for example, the user wrote
// #[no_mangle] extern "C" fn main(..) {..}