diff options
Diffstat (limited to 'vendor/github.com/twitchyliquid64/golang-asm/objabi/util.go')
| -rw-r--r-- | vendor/github.com/twitchyliquid64/golang-asm/objabi/util.go | 203 |
1 files changed, 0 insertions, 203 deletions
diff --git a/vendor/github.com/twitchyliquid64/golang-asm/objabi/util.go b/vendor/github.com/twitchyliquid64/golang-asm/objabi/util.go deleted file mode 100644 index 2c7b66e4d..000000000 --- a/vendor/github.com/twitchyliquid64/golang-asm/objabi/util.go +++ /dev/null @@ -1,203 +0,0 @@ -// Copyright 2015 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 objabi - -import ( - "fmt" - "log" - "os" - "strings" -) - -func envOr(key, value string) string { - if x := os.Getenv(key); x != "" { - return x - } - return value -} - -var ( - defaultGOROOT string // set by linker - - GOROOT = envOr("GOROOT", defaultGOROOT) - GOARCH = envOr("GOARCH", "amd64") - GOOS = envOr("GOOS", "linux") - GO386 = envOr("GO386", "") - GOAMD64 = goamd64() - GOARM = goarm() - GOMIPS = gomips() - GOMIPS64 = gomips64() - GOPPC64 = goppc64() - GOWASM = gowasm() - GO_LDSO = "" - Version = "" -) - -const ( - ElfRelocOffset = 256 - MachoRelocOffset = 2048 // reserve enough space for ELF relocations - Go115AMD64 = "alignedjumps" // Should be "alignedjumps" or "normaljumps"; this replaces environment variable introduced in CL 219357. -) - -// TODO(1.16): assuming no issues in 1.15 release, remove this and related constant. -func goamd64() string { - return Go115AMD64 -} - -func goarm() int { - switch v := envOr("GOARM", "7"); v { - case "5": - return 5 - case "6": - return 6 - case "7": - return 7 - } - // Fail here, rather than validate at multiple call sites. - log.Fatalf("Invalid GOARM value. Must be 5, 6, or 7.") - panic("unreachable") -} - -func gomips() string { - switch v := envOr("GOMIPS", "hardfloat"); v { - case "hardfloat", "softfloat": - return v - } - log.Fatalf("Invalid GOMIPS value. Must be hardfloat or softfloat.") - panic("unreachable") -} - -func gomips64() string { - switch v := envOr("GOMIPS64", "hardfloat"); v { - case "hardfloat", "softfloat": - return v - } - log.Fatalf("Invalid GOMIPS64 value. Must be hardfloat or softfloat.") - panic("unreachable") -} - -func goppc64() int { - switch v := envOr("GOPPC64", "power8"); v { - case "power8": - return 8 - case "power9": - return 9 - } - log.Fatalf("Invalid GOPPC64 value. Must be power8 or power9.") - panic("unreachable") -} - -type gowasmFeatures struct { - SignExt bool - SatConv bool -} - -func (f gowasmFeatures) String() string { - var flags []string - if f.SatConv { - flags = append(flags, "satconv") - } - if f.SignExt { - flags = append(flags, "signext") - } - return strings.Join(flags, ",") -} - -func gowasm() (f gowasmFeatures) { - for _, opt := range strings.Split(envOr("GOWASM", ""), ",") { - switch opt { - case "satconv": - f.SatConv = true - case "signext": - f.SignExt = true - case "": - // ignore - default: - log.Fatalf("Invalid GOWASM value. No such feature: " + opt) - } - } - return -} - -func Getgoextlinkenabled() string { - return envOr("GO_EXTLINK_ENABLED", "") -} - -func init() { - for _, f := range strings.Split("", ",") { - if f != "" { - addexp(f) - } - } - - // regabi is only supported on amd64. - if GOARCH != "amd64" { - Regabi_enabled = 0 - } -} - -// Note: must agree with runtime.framepointer_enabled. -var Framepointer_enabled = GOARCH == "amd64" || GOARCH == "arm64" && (GOOS == "linux" || GOOS == "darwin") - -func addexp(s string) { - // Could do general integer parsing here, but the runtime copy doesn't yet. - v := 1 - name := s - if len(name) > 2 && name[:2] == "no" { - v = 0 - name = name[2:] - } - for i := 0; i < len(exper); i++ { - if exper[i].name == name { - if exper[i].val != nil { - *exper[i].val = v - } - return - } - } - - fmt.Printf("unknown experiment %s\n", s) - os.Exit(2) -} - -var ( - Fieldtrack_enabled int - Preemptibleloops_enabled int - Staticlockranking_enabled int - Regabi_enabled int -) - -// Toolchain experiments. -// These are controlled by the GOEXPERIMENT environment -// variable recorded when the toolchain is built. -// This list is also known to cmd/gc. -var exper = []struct { - name string - val *int -}{ - {"fieldtrack", &Fieldtrack_enabled}, - {"preemptibleloops", &Preemptibleloops_enabled}, - {"staticlockranking", &Staticlockranking_enabled}, - {"regabi", &Regabi_enabled}, -} - -var defaultExpstring = Expstring() - -func DefaultExpstring() string { - return defaultExpstring -} - -func Expstring() string { - buf := "X" - for i := range exper { - if *exper[i].val != 0 { - buf += "," + exper[i].name - } - } - if buf == "X" { - buf += ",none" - } - return "X:" + buf[2:] -} |