diff options
Diffstat (limited to 'src/cmd/link/internal/loader/loader.go')
| -rw-r--r-- | src/cmd/link/internal/loader/loader.go | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/src/cmd/link/internal/loader/loader.go b/src/cmd/link/internal/loader/loader.go index e3ee819a9d..fa8c0c6b20 100644 --- a/src/cmd/link/internal/loader/loader.go +++ b/src/cmd/link/internal/loader/loader.go @@ -1618,6 +1618,29 @@ func (l *Loader) Aux(i Sym, j int) Aux { return Aux{r.Aux(li, j), r, l} } +// WasmImportSym returns the auxiliary WebAssembly import symbol associated with +// a given function symbol. The aux sym only exists for Go function stubs that +// have been annotated with the //go:wasmimport directive. The aux sym +// contains the information necessary for the linker to add a WebAssembly +// import statement. +// (https://webassembly.github.io/spec/core/syntax/modules.html#imports) +func (l *Loader) WasmImportSym(fnSymIdx Sym) (Sym, bool) { + if l.SymType(fnSymIdx) != sym.STEXT { + log.Fatalf("error: non-function sym %d/%s t=%s passed to WasmImportSym", fnSymIdx, l.SymName(fnSymIdx), l.SymType(fnSymIdx).String()) + } + r, li := l.toLocal(fnSymIdx) + auxs := r.Auxs(li) + for i := range auxs { + a := &auxs[i] + switch a.Type() { + case goobj.AuxWasmImport: + return l.resolve(r, a.Sym()), true + } + } + + return 0, false +} + // GetFuncDwarfAuxSyms collects and returns the auxiliary DWARF // symbols associated with a given function symbol. Prior to the // introduction of the loader, this was done purely using name |