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path: root/vendor/golang.org/x/sys/unix/mksyscall.go
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Diffstat (limited to 'vendor/golang.org/x/sys/unix/mksyscall.go')
-rw-r--r--vendor/golang.org/x/sys/unix/mksyscall.go367
1 files changed, 0 insertions, 367 deletions
diff --git a/vendor/golang.org/x/sys/unix/mksyscall.go b/vendor/golang.org/x/sys/unix/mksyscall.go
deleted file mode 100644
index 36c0b5a..0000000
--- a/vendor/golang.org/x/sys/unix/mksyscall.go
+++ /dev/null
@@ -1,367 +0,0 @@
-// Copyright 2018 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.
-
-// +build ignore
-
-/*
-This program reads a file containing function prototypes
-(like syscall_darwin.go) and generates system call bodies.
-The prototypes are marked by lines beginning with "//sys"
-and read like func declarations if //sys is replaced by func, but:
- * The parameter lists must give a name for each argument.
- This includes return parameters.
- * The parameter lists must give a type for each argument:
- the (x, y, z int) shorthand is not allowed.
- * If the return parameter is an error number, it must be named errno.
-
-A line beginning with //sysnb is like //sys, except that the
-goroutine will not be suspended during the execution of the system
-call. This must only be used for system calls which can never
-block, as otherwise the system call could cause all goroutines to
-hang.
-*/
-package main
-
-import (
- "bufio"
- "flag"
- "fmt"
- "os"
- "regexp"
- "strings"
-)
-
-var (
- b32 = flag.Bool("b32", false, "32bit big-endian")
- l32 = flag.Bool("l32", false, "32bit little-endian")
- plan9 = flag.Bool("plan9", false, "plan9")
- openbsd = flag.Bool("openbsd", false, "openbsd")
- netbsd = flag.Bool("netbsd", false, "netbsd")
- dragonfly = flag.Bool("dragonfly", false, "dragonfly")
- arm = flag.Bool("arm", false, "arm") // 64-bit value should use (even, odd)-pair
- tags = flag.String("tags", "", "build tags")
- filename = flag.String("output", "", "output file name (standard output if omitted)")
-)
-
-// cmdLine returns this programs's commandline arguments
-func cmdLine() string {
- return "go run mksyscall.go " + strings.Join(os.Args[1:], " ")
-}
-
-// buildTags returns build tags
-func buildTags() string {
- return *tags
-}
-
-// Param is function parameter
-type Param struct {
- Name string
- Type string
-}
-
-// usage prints the program usage
-func usage() {
- fmt.Fprintf(os.Stderr, "usage: go run mksyscall.go [-b32 | -l32] [-tags x,y] [file ...]\n")
- os.Exit(1)
-}
-
-// parseParamList parses parameter list and returns a slice of parameters
-func parseParamList(list string) []string {
- list = strings.TrimSpace(list)
- if list == "" {
- return []string{}
- }
- return regexp.MustCompile(`\s*,\s*`).Split(list, -1)
-}
-
-// parseParam splits a parameter into name and type
-func parseParam(p string) Param {
- ps := regexp.MustCompile(`^(\S*) (\S*)$`).FindStringSubmatch(p)
- if ps == nil {
- fmt.Fprintf(os.Stderr, "malformed parameter: %s\n", p)
- os.Exit(1)
- }
- return Param{ps[1], ps[2]}
-}
-
-func main() {
- // Get the OS and architecture (using GOARCH_TARGET if it exists)
- goos := os.Getenv("GOOS")
- goarch := os.Getenv("GOARCH_TARGET")
- if goarch == "" {
- goarch = os.Getenv("GOARCH")
- }
-
- // Check that we are using the new build system if we should
- if goos == "linux" && goarch != "sparc64" {
- if os.Getenv("GOLANG_SYS_BUILD") != "docker" {
- fmt.Fprintf(os.Stderr, "In the new build system, mksyscall should not be called directly.\n")
- fmt.Fprintf(os.Stderr, "See README.md\n")
- os.Exit(1)
- }
- }
-
- flag.Usage = usage
- flag.Parse()
- if len(flag.Args()) <= 0 {
- fmt.Fprintf(os.Stderr, "no files to parse provided\n")
- usage()
- }
-
- endianness := ""
- if *b32 {
- endianness = "big-endian"
- } else if *l32 {
- endianness = "little-endian"
- }
-
- text := ""
- for _, path := range flag.Args() {
- file, err := os.Open(path)
- if err != nil {
- fmt.Fprintf(os.Stderr, err.Error())
- os.Exit(1)
- }
- s := bufio.NewScanner(file)
- for s.Scan() {
- t := s.Text()
- t = strings.TrimSpace(t)
- t = regexp.MustCompile(`\s+`).ReplaceAllString(t, ` `)
- nonblock := regexp.MustCompile(`^\/\/sysnb `).FindStringSubmatch(t)
- if regexp.MustCompile(`^\/\/sys `).FindStringSubmatch(t) == nil && nonblock == nil {
- continue
- }
-
- // Line must be of the form
- // func Open(path string, mode int, perm int) (fd int, errno error)
- // Split into name, in params, out params.
- f := regexp.MustCompile(`^\/\/sys(nb)? (\w+)\(([^()]*)\)\s*(?:\(([^()]+)\))?\s*(?:=\s*((?i)SYS_[A-Z0-9_]+))?$`).FindStringSubmatch(t)
- if f == nil {
- fmt.Fprintf(os.Stderr, "%s:%s\nmalformed //sys declaration\n", path, t)
- os.Exit(1)
- }
- funct, inps, outps, sysname := f[2], f[3], f[4], f[5]
-
- // Split argument lists on comma.
- in := parseParamList(inps)
- out := parseParamList(outps)
-
- // Try in vain to keep people from editing this file.
- // The theory is that they jump into the middle of the file
- // without reading the header.
- text += "// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT\n\n"
-
- // Go function header.
- outDecl := ""
- if len(out) > 0 {
- outDecl = fmt.Sprintf(" (%s)", strings.Join(out, ", "))
- }
- text += fmt.Sprintf("func %s(%s)%s {\n", funct, strings.Join(in, ", "), outDecl)
-
- // Check if err return available
- errvar := ""
- for _, param := range out {
- p := parseParam(param)
- if p.Type == "error" {
- errvar = p.Name
- break
- }
- }
-
- // Prepare arguments to Syscall.
- var args []string
- n := 0
- for _, param := range in {
- p := parseParam(param)
- if regexp.MustCompile(`^\*`).FindStringSubmatch(p.Type) != nil {
- args = append(args, "uintptr(unsafe.Pointer("+p.Name+"))")
- } else if p.Type == "string" && errvar != "" {
- text += fmt.Sprintf("\tvar _p%d *byte\n", n)
- text += fmt.Sprintf("\t_p%d, %s = BytePtrFromString(%s)\n", n, errvar, p.Name)
- text += fmt.Sprintf("\tif %s != nil {\n\t\treturn\n\t}\n", errvar)
- args = append(args, fmt.Sprintf("uintptr(unsafe.Pointer(_p%d))", n))
- n++
- } else if p.Type == "string" {
- fmt.Fprintf(os.Stderr, path+":"+funct+" uses string arguments, but has no error return\n")
- text += fmt.Sprintf("\tvar _p%d *byte\n", n)
- text += fmt.Sprintf("\t_p%d, _ = BytePtrFromString(%s)\n", n, p.Name)
- args = append(args, fmt.Sprintf("uintptr(unsafe.Pointer(_p%d))", n))
- n++
- } else if regexp.MustCompile(`^\[\](.*)`).FindStringSubmatch(p.Type) != nil {
- // Convert slice into pointer, length.
- // Have to be careful not to take address of &a[0] if len == 0:
- // pass dummy pointer in that case.
- // Used to pass nil, but some OSes or simulators reject write(fd, nil, 0).
- text += fmt.Sprintf("\tvar _p%d unsafe.Pointer\n", n)
- text += fmt.Sprintf("\tif len(%s) > 0 {\n\t\t_p%d = unsafe.Pointer(&%s[0])\n\t}", p.Name, n, p.Name)
- text += fmt.Sprintf(" else {\n\t\t_p%d = unsafe.Pointer(&_zero)\n\t}\n", n)
- args = append(args, fmt.Sprintf("uintptr(_p%d)", n), fmt.Sprintf("uintptr(len(%s))", p.Name))
- n++
- } else if p.Type == "int64" && (*openbsd || *netbsd) {
- args = append(args, "0")
- if endianness == "big-endian" {
- args = append(args, fmt.Sprintf("uintptr(%s>>32)", p.Name), fmt.Sprintf("uintptr(%s)", p.Name))
- } else if endianness == "little-endian" {
- args = append(args, fmt.Sprintf("uintptr(%s)", p.Name), fmt.Sprintf("uintptr(%s>>32)", p.Name))
- } else {
- args = append(args, fmt.Sprintf("uintptr(%s)", p.Name))
- }
- } else if p.Type == "int64" && *dragonfly {
- if regexp.MustCompile(`^(?i)extp(read|write)`).FindStringSubmatch(funct) == nil {
- args = append(args, "0")
- }
- if endianness == "big-endian" {
- args = append(args, fmt.Sprintf("uintptr(%s>>32)", p.Name), fmt.Sprintf("uintptr(%s)", p.Name))
- } else if endianness == "little-endian" {
- args = append(args, fmt.Sprintf("uintptr(%s)", p.Name), fmt.Sprintf("uintptr(%s>>32)", p.Name))
- } else {
- args = append(args, fmt.Sprintf("uintptr(%s)", p.Name))
- }
- } else if p.Type == "int64" && endianness != "" {
- if len(args)%2 == 1 && *arm {
- // arm abi specifies 64-bit argument uses
- // (even, odd) pair
- args = append(args, "0")
- }
- if endianness == "big-endian" {
- args = append(args, fmt.Sprintf("uintptr(%s>>32)", p.Name), fmt.Sprintf("uintptr(%s)", p.Name))
- } else {
- args = append(args, fmt.Sprintf("uintptr(%s)", p.Name), fmt.Sprintf("uintptr(%s>>32)", p.Name))
- }
- } else {
- args = append(args, fmt.Sprintf("uintptr(%s)", p.Name))
- }
- }
-
- // Determine which form to use; pad args with zeros.
- asm := "Syscall"
- if nonblock != nil {
- if errvar == "" && goos == "linux" {
- asm = "RawSyscallNoError"
- } else {
- asm = "RawSyscall"
- }
- } else {
- if errvar == "" && goos == "linux" {
- asm = "SyscallNoError"
- }
- }
- if len(args) <= 3 {
- for len(args) < 3 {
- args = append(args, "0")
- }
- } else if len(args) <= 6 {
- asm += "6"
- for len(args) < 6 {
- args = append(args, "0")
- }
- } else if len(args) <= 9 {
- asm += "9"
- for len(args) < 9 {
- args = append(args, "0")
- }
- } else {
- fmt.Fprintf(os.Stderr, "%s:%s too many arguments to system call\n", path, funct)
- }
-
- // System call number.
- if sysname == "" {
- sysname = "SYS_" + funct
- sysname = regexp.MustCompile(`([a-z])([A-Z])`).ReplaceAllString(sysname, `${1}_$2`)
- sysname = strings.ToUpper(sysname)
- }
-
- // Actual call.
- arglist := strings.Join(args, ", ")
- call := fmt.Sprintf("%s(%s, %s)", asm, sysname, arglist)
-
- // Assign return values.
- body := ""
- ret := []string{"_", "_", "_"}
- doErrno := false
- for i := 0; i < len(out); i++ {
- p := parseParam(out[i])
- reg := ""
- if p.Name == "err" && !*plan9 {
- reg = "e1"
- ret[2] = reg
- doErrno = true
- } else if p.Name == "err" && *plan9 {
- ret[0] = "r0"
- ret[2] = "e1"
- break
- } else {
- reg = fmt.Sprintf("r%d", i)
- ret[i] = reg
- }
- if p.Type == "bool" {
- reg = fmt.Sprintf("%s != 0", reg)
- }
- if p.Type == "int64" && endianness != "" {
- // 64-bit number in r1:r0 or r0:r1.
- if i+2 > len(out) {
- fmt.Fprintf(os.Stderr, "%s:%s not enough registers for int64 return\n", path, funct)
- }
- if endianness == "big-endian" {
- reg = fmt.Sprintf("int64(r%d)<<32 | int64(r%d)", i, i+1)
- } else {
- reg = fmt.Sprintf("int64(r%d)<<32 | int64(r%d)", i+1, i)
- }
- ret[i] = fmt.Sprintf("r%d", i)
- ret[i+1] = fmt.Sprintf("r%d", i+1)
- }
- if reg != "e1" || *plan9 {
- body += fmt.Sprintf("\t%s = %s(%s)\n", p.Name, p.Type, reg)
- }
- }
- if ret[0] == "_" && ret[1] == "_" && ret[2] == "_" {
- text += fmt.Sprintf("\t%s\n", call)
- } else {
- if errvar == "" && goos == "linux" {
- // raw syscall without error on Linux, see golang.org/issue/22924
- text += fmt.Sprintf("\t%s, %s := %s\n", ret[0], ret[1], call)
- } else {
- text += fmt.Sprintf("\t%s, %s, %s := %s\n", ret[0], ret[1], ret[2], call)
- }
- }
- text += body
-
- if *plan9 && ret[2] == "e1" {
- text += "\tif int32(r0) == -1 {\n"
- text += "\t\terr = e1\n"
- text += "\t}\n"
- } else if doErrno {
- text += "\tif e1 != 0 {\n"
- text += "\t\terr = errnoErr(e1)\n"
- text += "\t}\n"
- }
- text += "\treturn\n"
- text += "}\n\n"
-
- }
- if err := s.Err(); err != nil {
- fmt.Fprintf(os.Stderr, err.Error())
- os.Exit(1)
- }
- file.Close()
- }
- fmt.Printf(srcTemplate, cmdLine(), buildTags(), text)
-}
-
-const srcTemplate = `// %s
-// Code generated by the command above; see README.md. DO NOT EDIT.
-
-// +build %s
-
-package unix
-
-import (
- "syscall"
- "unsafe"
-)
-
-var _ syscall.Errno
-
-%s
-`
generated by cgit v1.2.3 (git 2.39.1) at 2024-05-18 21:28:13 +0000