golang link 代码
文件路径：/src/cmd/compile/internal/base/link.go
/ Copyright 2021 The Go Authors. All rights reserved.
/ Use of this source code is governed by a BSD-style
/ license that can be found in the LICENSE file.
package base
import (
"cmd/internal/obj"
)
var Ctxt *obj.Link
/ TODO(mdempsky): These should probably be obj.Link methods.
/ PkgLinksym returns the linker symbol for name within the given
/ package prefix. For user packages, prefix should be the package
/ path encoded with objabi.PathToPrefix.
func PkgLinksym(prefix, name string, abi obj.ABI) *obj.LSym {
if name == "_" {
/ TODO(mdempsky): Cleanup callers and Fatalf instead.
return linksym(prefix, "_", abi)
}
return linksym(prefix, prefix+"."+name, abi)
}
/ Linkname returns the linker symbol for the given name as it might
/ appear within a /go:linkname directive.
func Linkname(name string, abi obj.ABI) *obj.LSym {
return linksym("_", name, abi)
}
/ linksym is an internal helper function for implementing the above
/ exported APIs.
func linksym(pkg, name string, abi obj.ABI) *obj.LSym {
return Ctxt.LookupABIInit(name, abi, func(r *obj.LSym) { r.Pkg = pkg })
}