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Don't export __heap_base and __data_end on wasm32-wasi.

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`__heap_base` and `__data_end` are exported for use by wasm-bindgen, which
uses the wasm32-unknown-unknown target. On wasm32-wasi, as a step toward
implementing the Canonical ABI, and as an aid to building speicalized WASI
API polyfill wrappers, don't export `__heap_base` and `__data_end` on
wasm32-wasi.
This commit is contained in:
Dan Gohman 2022-09-27 17:33:59 -07:00
parent 470e518c4b
commit 7f06d513fb
1 changed files with 6 additions and 4 deletions
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10
compiler/rustc_codegen_ssa/src/back/linker.rs
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@ -1320,10 +1320,12 @@ impl<'a> Linker for WasmLd<'a> {
// LLD will hide these otherwise-internal symbols since it only exports
// symbols explicitly passed via the `--export` flags above and hides all
// others. Various bits and pieces of tooling use this, so be sure these
// symbols make their way out of the linker as well.
self.cmd.arg("--export=__heap_base");
self.cmd.arg("--export=__data_end");
// others. Various bits and pieces of wasm32-unknown-unknown tooling use
// this, so be sure these symbols make their way out of the linker as well.
if self.sess.target.os == "unknown" {
self.cmd.arg("--export=__heap_base");
self.cmd.arg("--export=__data_end");
}
}
fn subsystem(&mut self, _subsystem: &str) {}