From f5437632f486b7d0a0a181c58f113c86d032b02c Mon Sep 17 00:00:00 2001 From: Christopher Speller Date: Mon, 24 Apr 2017 20:11:36 -0400 Subject: Upgrading server dependancies (#6215) --- vendor/golang.org/x/sys/unix/linux/mkall.go | 379 ++++++++++++++++++++++++++++ 1 file changed, 379 insertions(+) create mode 100644 vendor/golang.org/x/sys/unix/linux/mkall.go (limited to 'vendor/golang.org/x/sys/unix/linux/mkall.go') diff --git a/vendor/golang.org/x/sys/unix/linux/mkall.go b/vendor/golang.org/x/sys/unix/linux/mkall.go new file mode 100644 index 000000000..429754f16 --- /dev/null +++ b/vendor/golang.org/x/sys/unix/linux/mkall.go @@ -0,0 +1,379 @@ +// Copyright 2017 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. + +// linux/mkall.go - Generates all Linux zsysnum, zsyscall, zerror, and ztype +// files for all 11 linux architectures supported by the go compiler. See +// README.md for more information about the build system. + +// To run it you must have a git checkout of the Linux kernel and glibc. Once +// the appropriate sources are ready, the program is run as: +// go run linux/mkall.go + +// +build ignore + +package main + +import ( + "fmt" + "os" + "os/exec" + "path/filepath" + "runtime" + "strings" +) + +// These will be paths to the appropriate source directories. +var LinuxDir string +var GlibcDir string + +const TempDir = "/tmp" +const IncludeDir = TempDir + "/include" // To hold our C headers +const BuildDir = TempDir + "/build" // To hold intermediate build files + +const GOOS = "linux" // Only for Linux targets +const BuildArch = "amd64" // Must be built on this architecture +const MinKernel = "2.6.23" // https://golang.org/doc/install#requirements + +type target struct { + GoArch string // Architecture name according to Go + LinuxArch string // Architecture name according to the Linux Kernel + GNUArch string // Architecture name according to GNU tools (https://wiki.debian.org/Multiarch/Tuples) + BigEndian bool // Default Little Endian + SignedChar bool // Is -fsigned-char needed (default no) + Bits int +} + +// List of the 11 Linux targets supported by the go compiler. sparc64 is not +// currently supported, though a port is in progress. +var targets = []target{ + { + GoArch: "386", + LinuxArch: "x86", + GNUArch: "i686-linux-gnu", // Note "i686" not "i386" + Bits: 32, + }, + { + GoArch: "amd64", + LinuxArch: "x86", + GNUArch: "x86_64-linux-gnu", + Bits: 64, + }, + { + GoArch: "arm64", + LinuxArch: "arm64", + GNUArch: "aarch64-linux-gnu", + SignedChar: true, + Bits: 64, + }, + { + GoArch: "arm", + LinuxArch: "arm", + GNUArch: "arm-linux-gnueabi", + Bits: 32, + }, + { + GoArch: "mips", + LinuxArch: "mips", + GNUArch: "mips-linux-gnu", + BigEndian: true, + Bits: 32, + }, + { + GoArch: "mipsle", + LinuxArch: "mips", + GNUArch: "mipsel-linux-gnu", + Bits: 32, + }, + { + GoArch: "mips64", + LinuxArch: "mips", + GNUArch: "mips64-linux-gnuabi64", + BigEndian: true, + Bits: 64, + }, + { + GoArch: "mips64le", + LinuxArch: "mips", + GNUArch: "mips64el-linux-gnuabi64", + Bits: 64, + }, + { + GoArch: "ppc64", + LinuxArch: "powerpc", + GNUArch: "powerpc64-linux-gnu", + BigEndian: true, + Bits: 64, + }, + { + GoArch: "ppc64le", + LinuxArch: "powerpc", + GNUArch: "powerpc64le-linux-gnu", + Bits: 64, + }, + { + GoArch: "s390x", + LinuxArch: "s390", + GNUArch: "s390x-linux-gnu", + BigEndian: true, + SignedChar: true, + Bits: 64, + }, + // { + // GoArch: "sparc64", + // LinuxArch: "sparc", + // GNUArch: "sparc64-linux-gnu", + // BigEndian: true, + // Bits: 64, + // }, +} + +func main() { + if runtime.GOOS != GOOS || runtime.GOARCH != BuildArch { + fmt.Printf("Build system has GOOS_GOARCH = %s_%s, need %s_%s\n", + runtime.GOOS, runtime.GOARCH, GOOS, BuildArch) + return + } + + // Check that we are using the new build system if we should + if os.Getenv("GOLANG_SYS_BUILD") != "docker" { + fmt.Println("In the new build system, mkall.go should not be called directly.") + fmt.Println("See README.md") + return + } + + // Parse the command line options + if len(os.Args) != 3 { + fmt.Println("USAGE: go run linux/mkall.go ") + return + } + LinuxDir = os.Args[1] + GlibcDir = os.Args[2] + + for _, t := range targets { + fmt.Printf("----- GENERATING: %s -----\n", t.GoArch) + if err := t.generateFiles(); err != nil { + fmt.Printf("%v\n***** FAILURE: %s *****\n\n", err, t.GoArch) + } else { + fmt.Printf("----- SUCCESS: %s -----\n\n", t.GoArch) + } + } +} + +// Makes an exec.Cmd with Stderr attached to os.Stderr +func makeCommand(name string, args ...string) *exec.Cmd { + cmd := exec.Command(name, args...) + cmd.Stderr = os.Stderr + return cmd +} + +// Runs the command, pipes output to a formatter, pipes that to an output file. +func (t *target) commandFormatOutput(formatter string, outputFile string, + name string, args ...string) (err error) { + mainCmd := makeCommand(name, args...) + + fmtCmd := makeCommand(formatter) + if formatter == "mkpost" { + fmtCmd = makeCommand("go", "run", "mkpost.go") + // Set GOARCH_TARGET so mkpost knows what GOARCH is.. + fmtCmd.Env = append(os.Environ(), "GOARCH_TARGET="+t.GoArch) + // Set GOARCH to host arch for mkpost, so it can run natively. + for i, s := range fmtCmd.Env { + if strings.HasPrefix(s, "GOARCH=") { + fmtCmd.Env[i] = "GOARCH=" + BuildArch + } + } + } + + // mainCmd | fmtCmd > outputFile + if fmtCmd.Stdin, err = mainCmd.StdoutPipe(); err != nil { + return + } + if fmtCmd.Stdout, err = os.Create(outputFile); err != nil { + return + } + + // Make sure the formatter eventually closes + if err = fmtCmd.Start(); err != nil { + return + } + defer func() { + fmtErr := fmtCmd.Wait() + if err == nil { + err = fmtErr + } + }() + + return mainCmd.Run() +} + +// Generates all the files for a Linux target +func (t *target) generateFiles() error { + // Setup environment variables + os.Setenv("GOOS", GOOS) + os.Setenv("GOARCH", t.GoArch) + + // Get appropriate compiler and emulator (unless on x86) + if t.LinuxArch != "x86" { + // Check/Setup cross compiler + compiler := t.GNUArch + "-gcc" + if _, err := exec.LookPath(compiler); err != nil { + return err + } + os.Setenv("CC", compiler) + + // Check/Setup emulator (usually first component of GNUArch) + qemuArchName := t.GNUArch[:strings.Index(t.GNUArch, "-")] + if t.LinuxArch == "powerpc" { + qemuArchName = t.GoArch + } + os.Setenv("GORUN", "qemu-"+qemuArchName) + } else { + os.Setenv("CC", "gcc") + } + + // Make the include directory and fill it with headers + if err := os.MkdirAll(IncludeDir, os.ModePerm); err != nil { + return err + } + defer os.RemoveAll(IncludeDir) + if err := t.makeHeaders(); err != nil { + return fmt.Errorf("could not make header files: %v", err) + } + fmt.Println("header files generated") + + // Make each of the four files + if err := t.makeZSysnumFile(); err != nil { + return fmt.Errorf("could not make zsysnum file: %v", err) + } + fmt.Println("zsysnum file generated") + + if err := t.makeZSyscallFile(); err != nil { + return fmt.Errorf("could not make zsyscall file: %v", err) + } + fmt.Println("zsyscall file generated") + + if err := t.makeZTypesFile(); err != nil { + return fmt.Errorf("could not make ztypes file: %v", err) + } + fmt.Println("ztypes file generated") + + if err := t.makeZErrorsFile(); err != nil { + return fmt.Errorf("could not make zerrors file: %v", err) + } + fmt.Println("zerrors file generated") + + return nil +} + +// Create the Linux and glibc headers in the include directory. +func (t *target) makeHeaders() error { + // Make the Linux headers we need for this architecture + linuxMake := makeCommand("make", "headers_install", "ARCH="+t.LinuxArch, "INSTALL_HDR_PATH="+TempDir) + linuxMake.Dir = LinuxDir + if err := linuxMake.Run(); err != nil { + return err + } + + // A Temporary build directory for glibc + if err := os.MkdirAll(BuildDir, os.ModePerm); err != nil { + return err + } + defer os.RemoveAll(BuildDir) + + // Make the glibc headers we need for this architecture + confScript := filepath.Join(GlibcDir, "configure") + glibcConf := makeCommand(confScript, "--prefix="+TempDir, "--host="+t.GNUArch, "--enable-kernel="+MinKernel) + glibcConf.Dir = BuildDir + if err := glibcConf.Run(); err != nil { + return err + } + glibcMake := makeCommand("make", "install-headers") + glibcMake.Dir = BuildDir + if err := glibcMake.Run(); err != nil { + return err + } + // We only need an empty stubs file + stubsFile := filepath.Join(IncludeDir, "gnu/stubs.h") + if file, err := os.Create(stubsFile); err != nil { + return err + } else { + file.Close() + } + + return nil +} + +// makes the zsysnum_linux_$GOARCH.go file +func (t *target) makeZSysnumFile() error { + zsysnumFile := fmt.Sprintf("zsysnum_linux_%s.go", t.GoArch) + unistdFile := filepath.Join(IncludeDir, "asm/unistd.h") + + args := append(t.cFlags(), unistdFile) + return t.commandFormatOutput("gofmt", zsysnumFile, "linux/mksysnum.pl", args...) +} + +// makes the zsyscall_linux_$GOARCH.go file +func (t *target) makeZSyscallFile() error { + zsyscallFile := fmt.Sprintf("zsyscall_linux_%s.go", t.GoArch) + // Find the correct architecture syscall file (might end with x.go) + archSyscallFile := fmt.Sprintf("syscall_linux_%s.go", t.GoArch) + if _, err := os.Stat(archSyscallFile); os.IsNotExist(err) { + shortArch := strings.TrimSuffix(t.GoArch, "le") + archSyscallFile = fmt.Sprintf("syscall_linux_%sx.go", shortArch) + } + + args := append(t.mksyscallFlags(), "-tags", "linux,"+t.GoArch, + "syscall_linux.go", archSyscallFile) + return t.commandFormatOutput("gofmt", zsyscallFile, "./mksyscall.pl", args...) +} + +// makes the zerrors_linux_$GOARCH.go file +func (t *target) makeZErrorsFile() error { + zerrorsFile := fmt.Sprintf("zerrors_linux_%s.go", t.GoArch) + + return t.commandFormatOutput("gofmt", zerrorsFile, "./mkerrors.sh", t.cFlags()...) +} + +// makes the ztypes_linux_$GOARCH.go file +func (t *target) makeZTypesFile() error { + ztypesFile := fmt.Sprintf("ztypes_linux_%s.go", t.GoArch) + + args := []string{"tool", "cgo", "-godefs", "--"} + args = append(args, t.cFlags()...) + args = append(args, "linux/types.go") + return t.commandFormatOutput("mkpost", ztypesFile, "go", args...) +} + +// Flags that should be given to gcc and cgo for this target +func (t *target) cFlags() []string { + // Compile statically to avoid cross-architecture dynamic linking. + flags := []string{"-Wall", "-Werror", "-static", "-I" + IncludeDir} + + // Architecture-specific flags + if t.SignedChar { + flags = append(flags, "-fsigned-char") + } + if t.LinuxArch == "x86" { + flags = append(flags, fmt.Sprintf("-m%d", t.Bits)) + } + + return flags +} + +// Flags that should be given to mksyscall for this target +func (t *target) mksyscallFlags() (flags []string) { + if t.Bits == 32 { + if t.BigEndian { + flags = append(flags, "-b32") + } else { + flags = append(flags, "-l32") + } + } + + // This flag menas a 64-bit value should use (even, odd)-pair. + if t.GoArch == "arm" || (t.LinuxArch == "mips" && t.Bits == 32) { + flags = append(flags, "-arm") + } + return +} -- cgit v1.2.3-1-g7c22