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
5package main
6
7import (
8	"cmd/internal/sys"
9	"cmd/link/internal/amd64"
10	"cmd/link/internal/arm"
11	"cmd/link/internal/arm64"
12	"cmd/link/internal/ld"
13	"cmd/link/internal/loong64"
14	"cmd/link/internal/mips"
15	"cmd/link/internal/mips64"
16	"cmd/link/internal/ppc64"
17	"cmd/link/internal/riscv64"
18	"cmd/link/internal/s390x"
19	"cmd/link/internal/wasm"
20	"cmd/link/internal/x86"
21	"fmt"
22	"internal/buildcfg"
23	"os"
24)
25
26// The bulk of the linker implementation lives in cmd/link/internal/ld.
27// Architecture-specific code lives in cmd/link/internal/GOARCH.
28//
29// Program initialization:
30//
31// Before any argument parsing is done, the Init function of relevant
32// architecture package is called. The only job done in Init is
33// configuration of the architecture-specific variables.
34//
35// Then control flow passes to ld.Main, which parses flags, makes
36// some configuration decisions, and then gives the architecture
37// packages a second chance to modify the linker's configuration
38// via the ld.Arch.Archinit function.
39
40func main() {
41	var arch *sys.Arch
42	var theArch ld.Arch
43
44	buildcfg.Check()
45	switch buildcfg.GOARCH {
46	default:
47		fmt.Fprintf(os.Stderr, "link: unknown architecture %q\n", buildcfg.GOARCH)
48		os.Exit(2)
49	case "386":
50		arch, theArch = x86.Init()
51	case "amd64":
52		arch, theArch = amd64.Init()
53	case "arm":
54		arch, theArch = arm.Init()
55	case "arm64":
56		arch, theArch = arm64.Init()
57	case "loong64":
58		arch, theArch = loong64.Init()
59	case "mips", "mipsle":
60		arch, theArch = mips.Init()
61	case "mips64", "mips64le":
62		arch, theArch = mips64.Init()
63	case "ppc64", "ppc64le":
64		arch, theArch = ppc64.Init()
65	case "riscv64":
66		arch, theArch = riscv64.Init()
67	case "s390x":
68		arch, theArch = s390x.Init()
69	case "wasm":
70		arch, theArch = wasm.Init()
71	}
72	ld.Main(arch, theArch)
73}
74