1 // Copyright 2015 The Go Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style 3 // license that can be found in the LICENSE file. 4 5 package main 6 7 import ( 8 "cmd/internal/obj" 9 "cmd/link/internal/amd64" 10 "cmd/link/internal/arm" 11 "cmd/link/internal/arm64" 12 "cmd/link/internal/ld" 13 "cmd/link/internal/mips" 14 "cmd/link/internal/mips64" 15 "cmd/link/internal/ppc64" 16 "cmd/link/internal/s390x" 17 "cmd/link/internal/x86" 18 "fmt" 19 "os" 20 ) 21 22 // The bulk of the linker implementation lives in cmd/link/internal/ld. 23 // Architecture-specific code lives in cmd/link/internal/GOARCH. 24 // 25 // Program initialization: 26 // 27 // Before any argument parsing is done, the Init function of relevant 28 // architecture package is called. The only job done in Init is 29 // configuration of the ld.Thearch and ld.SysArch variables. 30 // 31 // Then control flow passes to ld.Main, which parses flags, makes 32 // some configuration decisions, and then gives the architecture 33 // packages a second chance to modify the linker's configuration 34 // via the ld.Thearch.Archinit function. 35 36 func main() { 37 switch obj.GOARCH { 38 default: 39 fmt.Fprintf(os.Stderr, "link: unknown architecture %q\n", obj.GOARCH) 40 os.Exit(2) 41 case "386": 42 x86.Init() 43 case "amd64", "amd64p32": 44 amd64.Init() 45 case "arm": 46 arm.Init() 47 case "arm64": 48 arm64.Init() 49 case "mips", "mipsle": 50 mips.Init() 51 case "mips64", "mips64le": 52 mips64.Init() 53 case "ppc64", "ppc64le": 54 ppc64.Init() 55 case "s390x": 56 s390x.Init() 57 } 58 ld.Main() 59 } 60
