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plan9: replace "mksyscall.pl" with Go program
Modify unix/mksyscall.go to support plan9. This does not generate any git diff besides the command name in comments of generated files and addition of +build tags. Updates golang/go#27779 Change-Id: I359a80d1c08837d92a7095e5235867c29a2d2a60 Reviewed-on: https://go-review.googlesource.com/c/156157 Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Tobias Klauser <tobias.klauser@gmail.com>
This commit is contained in:
Visweswara R
committed by
Tobias Klauser
Tobias Klauser
parent
1775db3f06
commit
cb59ee3660
@@ -0,0 +1,393 @@
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// Copyright 2018 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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// +build ignore
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/*
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This program reads a file containing function prototypes
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(like syscall_plan9.go) and generates system call bodies.
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The prototypes are marked by lines beginning with "//sys"
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and read like func declarations if //sys is replaced by func, but:
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* The parameter lists must give a name for each argument.
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This includes return parameters.
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* The parameter lists must give a type for each argument:
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the (x, y, z int) shorthand is not allowed.
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* If the return parameter is an error number, it must be named errno.
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A line beginning with //sysnb is like //sys, except that the
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goroutine will not be suspended during the execution of the system
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call. This must only be used for system calls which can never
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block, as otherwise the system call could cause all goroutines to
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hang.
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*/
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package main
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import (
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"bufio"
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"flag"
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"fmt"
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"os"
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"regexp"
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"strings"
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)
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var (
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b32 = flag.Bool("b32", false, "32bit big-endian")
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l32 = flag.Bool("l32", false, "32bit little-endian")
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plan9 = flag.Bool("plan9", false, "plan9")
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openbsd = flag.Bool("openbsd", false, "openbsd")
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netbsd = flag.Bool("netbsd", false, "netbsd")
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dragonfly = flag.Bool("dragonfly", false, "dragonfly")
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arm = flag.Bool("arm", false, "arm") // 64-bit value should use (even, odd)-pair
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tags = flag.String("tags", "", "build tags")
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filename = flag.String("output", "", "output file name (standard output if omitted)")
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)
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// cmdLine returns this programs's commandline arguments
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func cmdLine() string {
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return "go run mksyscall.go " + strings.Join(os.Args[1:], " ")
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}
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// buildTags returns build tags
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func buildTags() string {
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return *tags
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}
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// Param is function parameter
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type Param struct {
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Name string
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Type string
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}
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// usage prints the program usage
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func usage() {
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fmt.Fprintf(os.Stderr, "usage: go run mksyscall.go [-b32 | -l32] [-tags x,y] [file ...]\n")
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os.Exit(1)
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}
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// parseParamList parses parameter list and returns a slice of parameters
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func parseParamList(list string) []string {
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list = strings.TrimSpace(list)
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if list == "" {
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return []string{}
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}
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return regexp.MustCompile(`\s*,\s*`).Split(list, -1)
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}
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// parseParam splits a parameter into name and type
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func parseParam(p string) Param {
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ps := regexp.MustCompile(`^(\S*) (\S*)$`).FindStringSubmatch(p)
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if ps == nil {
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fmt.Fprintf(os.Stderr, "malformed parameter: %s\n", p)
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os.Exit(1)
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}
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return Param{ps[1], ps[2]}
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}
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func main() {
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// Get the OS and architecture (using GOARCH_TARGET if it exists)
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goos := os.Getenv("GOOS")
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goarch := os.Getenv("GOARCH_TARGET")
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if goarch == "" {
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goarch = os.Getenv("GOARCH")
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}
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// Check that we are using the Docker-based build system if we should
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if goos == "linux" {
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if os.Getenv("GOLANG_SYS_BUILD") != "docker" {
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fmt.Fprintf(os.Stderr, "In the Docker-based build system, mksyscall should not be called directly.\n")
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fmt.Fprintf(os.Stderr, "See README.md\n")
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os.Exit(1)
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}
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}
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flag.Usage = usage
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flag.Parse()
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if len(flag.Args()) <= 0 {
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fmt.Fprintf(os.Stderr, "no files to parse provided\n")
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usage()
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}
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endianness := ""
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if *b32 {
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endianness = "big-endian"
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} else if *l32 {
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endianness = "little-endian"
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}
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libc := false
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if goos == "darwin" && strings.Contains(buildTags(), ",go1.12") {
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libc = true
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}
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trampolines := map[string]bool{}
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text := ""
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for _, path := range flag.Args() {
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file, err := os.Open(path)
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if err != nil {
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fmt.Fprintf(os.Stderr, err.Error())
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os.Exit(1)
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}
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s := bufio.NewScanner(file)
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for s.Scan() {
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t := s.Text()
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t = strings.TrimSpace(t)
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t = regexp.MustCompile(`\s+`).ReplaceAllString(t, ` `)
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nonblock := regexp.MustCompile(`^\/\/sysnb `).FindStringSubmatch(t)
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if regexp.MustCompile(`^\/\/sys `).FindStringSubmatch(t) == nil && nonblock == nil {
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continue
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}
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// Line must be of the form
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// func Open(path string, mode int, perm int) (fd int, errno error)
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// Split into name, in params, out params.
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f := regexp.MustCompile(`^\/\/sys(nb)? (\w+)\(([^()]*)\)\s*(?:\(([^()]+)\))?\s*(?:=\s*((?i)SYS_[A-Z0-9_]+))?$`).FindStringSubmatch(t)
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if f == nil {
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fmt.Fprintf(os.Stderr, "%s:%s\nmalformed //sys declaration\n", path, t)
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os.Exit(1)
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}
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funct, inps, outps, sysname := f[2], f[3], f[4], f[5]
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// Split argument lists on comma.
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in := parseParamList(inps)
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out := parseParamList(outps)
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// Try in vain to keep people from editing this file.
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// The theory is that they jump into the middle of the file
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// without reading the header.
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text += "// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT\n\n"
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// Go function header.
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outDecl := ""
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if len(out) > 0 {
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outDecl = fmt.Sprintf(" (%s)", strings.Join(out, ", "))
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}
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text += fmt.Sprintf("func %s(%s)%s {\n", funct, strings.Join(in, ", "), outDecl)
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// Check if err return available
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errvar := ""
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for _, param := range out {
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p := parseParam(param)
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if p.Type == "error" {
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errvar = p.Name
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break
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}
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}
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// Prepare arguments to Syscall.
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var args []string
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n := 0
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for _, param := range in {
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p := parseParam(param)
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if regexp.MustCompile(`^\*`).FindStringSubmatch(p.Type) != nil {
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args = append(args, "uintptr(unsafe.Pointer("+p.Name+"))")
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} else if p.Type == "string" && errvar != "" {
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text += fmt.Sprintf("\tvar _p%d *byte\n", n)
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text += fmt.Sprintf("\t_p%d, %s = BytePtrFromString(%s)\n", n, errvar, p.Name)
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text += fmt.Sprintf("\tif %s != nil {\n\t\treturn\n\t}\n", errvar)
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args = append(args, fmt.Sprintf("uintptr(unsafe.Pointer(_p%d))", n))
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n++
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} else if p.Type == "string" {
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fmt.Fprintf(os.Stderr, path+":"+funct+" uses string arguments, but has no error return\n")
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text += fmt.Sprintf("\tvar _p%d *byte\n", n)
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text += fmt.Sprintf("\t_p%d, _ = BytePtrFromString(%s)\n", n, p.Name)
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args = append(args, fmt.Sprintf("uintptr(unsafe.Pointer(_p%d))", n))
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n++
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} else if regexp.MustCompile(`^\[\](.*)`).FindStringSubmatch(p.Type) != nil {
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// Convert slice into pointer, length.
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// Have to be careful not to take address of &a[0] if len == 0:
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// pass dummy pointer in that case.
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// Used to pass nil, but some OSes or simulators reject write(fd, nil, 0).
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text += fmt.Sprintf("\tvar _p%d unsafe.Pointer\n", n)
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text += fmt.Sprintf("\tif len(%s) > 0 {\n\t\t_p%d = unsafe.Pointer(&%s[0])\n\t}", p.Name, n, p.Name)
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text += fmt.Sprintf(" else {\n\t\t_p%d = unsafe.Pointer(&_zero)\n\t}\n", n)
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args = append(args, fmt.Sprintf("uintptr(_p%d)", n), fmt.Sprintf("uintptr(len(%s))", p.Name))
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n++
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} else if p.Type == "int64" && (*openbsd || *netbsd) {
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args = append(args, "0")
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if endianness == "big-endian" {
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args = append(args, fmt.Sprintf("uintptr(%s>>32)", p.Name), fmt.Sprintf("uintptr(%s)", p.Name))
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} else if endianness == "little-endian" {
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args = append(args, fmt.Sprintf("uintptr(%s)", p.Name), fmt.Sprintf("uintptr(%s>>32)", p.Name))
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} else {
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args = append(args, fmt.Sprintf("uintptr(%s)", p.Name))
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}
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} else if p.Type == "int64" && *dragonfly {
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if regexp.MustCompile(`^(?i)extp(read|write)`).FindStringSubmatch(funct) == nil {
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args = append(args, "0")
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}
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if endianness == "big-endian" {
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args = append(args, fmt.Sprintf("uintptr(%s>>32)", p.Name), fmt.Sprintf("uintptr(%s)", p.Name))
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} else if endianness == "little-endian" {
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args = append(args, fmt.Sprintf("uintptr(%s)", p.Name), fmt.Sprintf("uintptr(%s>>32)", p.Name))
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} else {
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args = append(args, fmt.Sprintf("uintptr(%s)", p.Name))
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}
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} else if p.Type == "int64" && endianness != "" {
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if len(args)%2 == 1 && *arm {
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// arm abi specifies 64-bit argument uses
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// (even, odd) pair
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args = append(args, "0")
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}
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if endianness == "big-endian" {
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args = append(args, fmt.Sprintf("uintptr(%s>>32)", p.Name), fmt.Sprintf("uintptr(%s)", p.Name))
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} else {
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args = append(args, fmt.Sprintf("uintptr(%s)", p.Name), fmt.Sprintf("uintptr(%s>>32)", p.Name))
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}
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} else {
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args = append(args, fmt.Sprintf("uintptr(%s)", p.Name))
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}
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}
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// Determine which form to use; pad args with zeros.
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asm := "Syscall"
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if nonblock != nil {
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if errvar == "" && goos == "linux" {
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asm = "RawSyscallNoError"
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} else {
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asm = "RawSyscall"
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}
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} else {
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if errvar == "" && goos == "linux" {
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asm = "SyscallNoError"
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}
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}
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if len(args) <= 3 {
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for len(args) < 3 {
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args = append(args, "0")
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}
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} else if len(args) <= 6 {
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asm += "6"
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for len(args) < 6 {
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args = append(args, "0")
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}
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} else if len(args) <= 9 {
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asm += "9"
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for len(args) < 9 {
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args = append(args, "0")
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}
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} else {
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fmt.Fprintf(os.Stderr, "%s:%s too many arguments to system call\n", path, funct)
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}
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// System call number.
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if sysname == "" {
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sysname = "SYS_" + funct
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sysname = regexp.MustCompile(`([a-z])([A-Z])`).ReplaceAllString(sysname, `${1}_$2`)
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sysname = strings.ToUpper(sysname)
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}
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var libcFn string
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if libc {
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asm = "syscall_" + strings.ToLower(asm[:1]) + asm[1:] // internal syscall call
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sysname = strings.TrimPrefix(sysname, "SYS_") // remove SYS_
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sysname = strings.ToLower(sysname) // lowercase
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if sysname == "getdirentries64" {
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// Special case - libSystem name and
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// raw syscall name don't match.
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sysname = "__getdirentries64"
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}
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libcFn = sysname
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sysname = "funcPC(libc_" + sysname + "_trampoline)"
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}
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// Actual call.
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arglist := strings.Join(args, ", ")
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call := fmt.Sprintf("%s(%s, %s)", asm, sysname, arglist)
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// Assign return values.
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body := ""
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ret := []string{"_", "_", "_"}
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doErrno := false
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for i := 0; i < len(out); i++ {
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p := parseParam(out[i])
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reg := ""
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|
if p.Name == "err" && !*plan9 {
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|
reg = "e1"
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|
ret[2] = reg
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doErrno = true
|
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|
} else if p.Name == "err" && *plan9 {
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|
ret[0] = "r0"
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|
ret[2] = "e1"
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|
break
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|
} else {
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|
reg = fmt.Sprintf("r%d", i)
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|
ret[i] = reg
|
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|
}
|
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|
if p.Type == "bool" {
|
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|
reg = fmt.Sprintf("%s != 0", reg)
|
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|
}
|
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|
if p.Type == "int64" && endianness != "" {
|
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|
// 64-bit number in r1:r0 or r0:r1.
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|
if i+2 > len(out) {
|
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|
fmt.Fprintf(os.Stderr, "%s:%s not enough registers for int64 return\n", path, funct)
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|
}
|
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|
if endianness == "big-endian" {
|
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|
reg = fmt.Sprintf("int64(r%d)<<32 | int64(r%d)", i, i+1)
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|
} else {
|
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|
reg = fmt.Sprintf("int64(r%d)<<32 | int64(r%d)", i+1, i)
|
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|
}
|
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|
ret[i] = fmt.Sprintf("r%d", i)
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|
ret[i+1] = fmt.Sprintf("r%d", i+1)
|
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|
}
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|
if reg != "e1" || *plan9 {
|
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|
body += fmt.Sprintf("\t%s = %s(%s)\n", p.Name, p.Type, reg)
|
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|
}
|
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|
}
|
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|
if ret[0] == "_" && ret[1] == "_" && ret[2] == "_" {
|
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|
text += fmt.Sprintf("\t%s\n", call)
|
||||||
|
} else {
|
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|
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 {
|
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|
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 libc && !trampolines[libcFn] {
|
||||||
|
// some system calls share a trampoline, like read and readlen.
|
||||||
|
trampolines[libcFn] = true
|
||||||
|
// Declare assembly trampoline.
|
||||||
|
text += fmt.Sprintf("func libc_%s_trampoline()\n", libcFn)
|
||||||
|
// Assembly trampoline calls the libc_* function, which this magic
|
||||||
|
// redirects to use the function from libSystem.
|
||||||
|
text += fmt.Sprintf("//go:linkname libc_%s libc_%s\n", libcFn, libcFn)
|
||||||
|
text += fmt.Sprintf("//go:cgo_import_dynamic libc_%s %s \"/usr/lib/libSystem.B.dylib\"\n", libcFn, libcFn)
|
||||||
|
text += "\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 plan9
|
||||||
|
|
||||||
|
import "unsafe"
|
||||||
|
|
||||||
|
%s
|
||||||
|
`
|
||||||
@@ -1,313 +0,0 @@
|
|||||||
#!/usr/bin/env perl
|
|
||||||
# Copyright 2009 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.
|
|
||||||
|
|
||||||
# This program reads a file containing function prototypes
|
|
||||||
# (like syscall_plan9.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.
|
|
||||||
|
|
||||||
use strict;
|
|
||||||
|
|
||||||
my $cmdline = "mksyscall.pl " . join(' ', @ARGV);
|
|
||||||
my $errors = 0;
|
|
||||||
my $_32bit = "";
|
|
||||||
my $plan9 = 0;
|
|
||||||
my $openbsd = 0;
|
|
||||||
my $netbsd = 0;
|
|
||||||
my $dragonfly = 0;
|
|
||||||
my $nacl = 0;
|
|
||||||
my $arm = 0; # 64-bit value should use (even, odd)-pair
|
|
||||||
|
|
||||||
if($ARGV[0] eq "-b32") {
|
|
||||||
$_32bit = "big-endian";
|
|
||||||
shift;
|
|
||||||
} elsif($ARGV[0] eq "-l32") {
|
|
||||||
$_32bit = "little-endian";
|
|
||||||
shift;
|
|
||||||
}
|
|
||||||
if($ARGV[0] eq "-plan9") {
|
|
||||||
$plan9 = 1;
|
|
||||||
shift;
|
|
||||||
}
|
|
||||||
if($ARGV[0] eq "-openbsd") {
|
|
||||||
$openbsd = 1;
|
|
||||||
shift;
|
|
||||||
}
|
|
||||||
if($ARGV[0] eq "-netbsd") {
|
|
||||||
$netbsd = 1;
|
|
||||||
shift;
|
|
||||||
}
|
|
||||||
if($ARGV[0] eq "-dragonfly") {
|
|
||||||
$dragonfly = 1;
|
|
||||||
shift;
|
|
||||||
}
|
|
||||||
if($ARGV[0] eq "-nacl") {
|
|
||||||
$nacl = 1;
|
|
||||||
shift;
|
|
||||||
}
|
|
||||||
if($ARGV[0] eq "-arm") {
|
|
||||||
$arm = 1;
|
|
||||||
shift;
|
|
||||||
}
|
|
||||||
|
|
||||||
if($ARGV[0] =~ /^-/) {
|
|
||||||
print STDERR "usage: mksyscall.pl [-b32 | -l32] [file ...]\n";
|
|
||||||
exit 1;
|
|
||||||
}
|
|
||||||
|
|
||||||
sub parseparamlist($) {
|
|
||||||
my ($list) = @_;
|
|
||||||
$list =~ s/^\s*//;
|
|
||||||
$list =~ s/\s*$//;
|
|
||||||
if($list eq "") {
|
|
||||||
return ();
|
|
||||||
}
|
|
||||||
return split(/\s*,\s*/, $list);
|
|
||||||
}
|
|
||||||
|
|
||||||
sub parseparam($) {
|
|
||||||
my ($p) = @_;
|
|
||||||
if($p !~ /^(\S*) (\S*)$/) {
|
|
||||||
print STDERR "$ARGV:$.: malformed parameter: $p\n";
|
|
||||||
$errors = 1;
|
|
||||||
return ("xx", "int");
|
|
||||||
}
|
|
||||||
return ($1, $2);
|
|
||||||
}
|
|
||||||
|
|
||||||
my $text = "";
|
|
||||||
while(<>) {
|
|
||||||
chomp;
|
|
||||||
s/\s+/ /g;
|
|
||||||
s/^\s+//;
|
|
||||||
s/\s+$//;
|
|
||||||
my $nonblock = /^\/\/sysnb /;
|
|
||||||
next if !/^\/\/sys / && !$nonblock;
|
|
||||||
|
|
||||||
# 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.
|
|
||||||
if(!/^\/\/sys(nb)? (\w+)\(([^()]*)\)\s*(?:\(([^()]+)\))?\s*(?:=\s*((?i)SYS_[A-Z0-9_]+))?$/) {
|
|
||||||
print STDERR "$ARGV:$.: malformed //sys declaration\n";
|
|
||||||
$errors = 1;
|
|
||||||
next;
|
|
||||||
}
|
|
||||||
my ($func, $in, $out, $sysname) = ($2, $3, $4, $5);
|
|
||||||
|
|
||||||
# Split argument lists on comma.
|
|
||||||
my @in = parseparamlist($in);
|
|
||||||
my @out = parseparamlist($out);
|
|
||||||
|
|
||||||
# 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.
|
|
||||||
my $out_decl = @out ? sprintf(" (%s)", join(', ', @out)) : "";
|
|
||||||
$text .= sprintf "func %s(%s)%s {\n", $func, join(', ', @in), $out_decl;
|
|
||||||
|
|
||||||
# Check if err return available
|
|
||||||
my $errvar = "";
|
|
||||||
foreach my $p (@out) {
|
|
||||||
my ($name, $type) = parseparam($p);
|
|
||||||
if($type eq "error") {
|
|
||||||
$errvar = $name;
|
|
||||||
last;
|
|
||||||
}
|
|
||||||
}
|
|
||||||
|
|
||||||
# Prepare arguments to Syscall.
|
|
||||||
my @args = ();
|
|
||||||
my $n = 0;
|
|
||||||
foreach my $p (@in) {
|
|
||||||
my ($name, $type) = parseparam($p);
|
|
||||||
if($type =~ /^\*/) {
|
|
||||||
push @args, "uintptr(unsafe.Pointer($name))";
|
|
||||||
} elsif($type eq "string" && $errvar ne "") {
|
|
||||||
$text .= "\tvar _p$n *byte\n";
|
|
||||||
$text .= "\t_p$n, $errvar = BytePtrFromString($name)\n";
|
|
||||||
$text .= "\tif $errvar != nil {\n\t\treturn\n\t}\n";
|
|
||||||
push @args, "uintptr(unsafe.Pointer(_p$n))";
|
|
||||||
$n++;
|
|
||||||
} elsif($type eq "string") {
|
|
||||||
print STDERR "$ARGV:$.: $func uses string arguments, but has no error return\n";
|
|
||||||
$text .= "\tvar _p$n *byte\n";
|
|
||||||
$text .= "\t_p$n, _ = BytePtrFromString($name)\n";
|
|
||||||
push @args, "uintptr(unsafe.Pointer(_p$n))";
|
|
||||||
$n++;
|
|
||||||
} elsif($type =~ /^\[\](.*)/) {
|
|
||||||
# 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).
|
|
||||||
$text .= "\tvar _p$n unsafe.Pointer\n";
|
|
||||||
$text .= "\tif len($name) > 0 {\n\t\t_p$n = unsafe.Pointer(\&${name}[0])\n\t}";
|
|
||||||
$text .= " else {\n\t\t_p$n = unsafe.Pointer(&_zero)\n\t}";
|
|
||||||
$text .= "\n";
|
|
||||||
push @args, "uintptr(_p$n)", "uintptr(len($name))";
|
|
||||||
$n++;
|
|
||||||
} elsif($type eq "int64" && ($openbsd || $netbsd)) {
|
|
||||||
push @args, "0";
|
|
||||||
if($_32bit eq "big-endian") {
|
|
||||||
push @args, "uintptr($name>>32)", "uintptr($name)";
|
|
||||||
} elsif($_32bit eq "little-endian") {
|
|
||||||
push @args, "uintptr($name)", "uintptr($name>>32)";
|
|
||||||
} else {
|
|
||||||
push @args, "uintptr($name)";
|
|
||||||
}
|
|
||||||
} elsif($type eq "int64" && $dragonfly) {
|
|
||||||
if ($func !~ /^extp(read|write)/i) {
|
|
||||||
push @args, "0";
|
|
||||||
}
|
|
||||||
if($_32bit eq "big-endian") {
|
|
||||||
push @args, "uintptr($name>>32)", "uintptr($name)";
|
|
||||||
} elsif($_32bit eq "little-endian") {
|
|
||||||
push @args, "uintptr($name)", "uintptr($name>>32)";
|
|
||||||
} else {
|
|
||||||
push @args, "uintptr($name)";
|
|
||||||
}
|
|
||||||
} elsif($type eq "int64" && $_32bit ne "") {
|
|
||||||
if(@args % 2 && $arm) {
|
|
||||||
# arm abi specifies 64-bit argument uses
|
|
||||||
# (even, odd) pair
|
|
||||||
push @args, "0"
|
|
||||||
}
|
|
||||||
if($_32bit eq "big-endian") {
|
|
||||||
push @args, "uintptr($name>>32)", "uintptr($name)";
|
|
||||||
} else {
|
|
||||||
push @args, "uintptr($name)", "uintptr($name>>32)";
|
|
||||||
}
|
|
||||||
} else {
|
|
||||||
push @args, "uintptr($name)";
|
|
||||||
}
|
|
||||||
}
|
|
||||||
|
|
||||||
# Determine which form to use; pad args with zeros.
|
|
||||||
my $asm = "Syscall";
|
|
||||||
if ($nonblock) {
|
|
||||||
$asm = "RawSyscall";
|
|
||||||
}
|
|
||||||
if(@args <= 3) {
|
|
||||||
while(@args < 3) {
|
|
||||||
push @args, "0";
|
|
||||||
}
|
|
||||||
} elsif(@args <= 6) {
|
|
||||||
$asm .= "6";
|
|
||||||
while(@args < 6) {
|
|
||||||
push @args, "0";
|
|
||||||
}
|
|
||||||
} elsif(@args <= 9) {
|
|
||||||
$asm .= "9";
|
|
||||||
while(@args < 9) {
|
|
||||||
push @args, "0";
|
|
||||||
}
|
|
||||||
} else {
|
|
||||||
print STDERR "$ARGV:$.: too many arguments to system call\n";
|
|
||||||
}
|
|
||||||
|
|
||||||
# System call number.
|
|
||||||
if($sysname eq "") {
|
|
||||||
$sysname = "SYS_$func";
|
|
||||||
$sysname =~ s/([a-z])([A-Z])/${1}_$2/g; # turn FooBar into Foo_Bar
|
|
||||||
$sysname =~ y/a-z/A-Z/;
|
|
||||||
if($nacl) {
|
|
||||||
$sysname =~ y/A-Z/a-z/;
|
|
||||||
}
|
|
||||||
}
|
|
||||||
|
|
||||||
# Actual call.
|
|
||||||
my $args = join(', ', @args);
|
|
||||||
my $call = "$asm($sysname, $args)";
|
|
||||||
|
|
||||||
# Assign return values.
|
|
||||||
my $body = "";
|
|
||||||
my @ret = ("_", "_", "_");
|
|
||||||
my $do_errno = 0;
|
|
||||||
for(my $i=0; $i<@out; $i++) {
|
|
||||||
my $p = $out[$i];
|
|
||||||
my ($name, $type) = parseparam($p);
|
|
||||||
my $reg = "";
|
|
||||||
if($name eq "err" && !$plan9) {
|
|
||||||
$reg = "e1";
|
|
||||||
$ret[2] = $reg;
|
|
||||||
$do_errno = 1;
|
|
||||||
} elsif($name eq "err" && $plan9) {
|
|
||||||
$ret[0] = "r0";
|
|
||||||
$ret[2] = "e1";
|
|
||||||
next;
|
|
||||||
} else {
|
|
||||||
$reg = sprintf("r%d", $i);
|
|
||||||
$ret[$i] = $reg;
|
|
||||||
}
|
|
||||||
if($type eq "bool") {
|
|
||||||
$reg = "$reg != 0";
|
|
||||||
}
|
|
||||||
if($type eq "int64" && $_32bit ne "") {
|
|
||||||
# 64-bit number in r1:r0 or r0:r1.
|
|
||||||
if($i+2 > @out) {
|
|
||||||
print STDERR "$ARGV:$.: not enough registers for int64 return\n";
|
|
||||||
}
|
|
||||||
if($_32bit eq "big-endian") {
|
|
||||||
$reg = sprintf("int64(r%d)<<32 | int64(r%d)", $i, $i+1);
|
|
||||||
} else {
|
|
||||||
$reg = sprintf("int64(r%d)<<32 | int64(r%d)", $i+1, $i);
|
|
||||||
}
|
|
||||||
$ret[$i] = sprintf("r%d", $i);
|
|
||||||
$ret[$i+1] = sprintf("r%d", $i+1);
|
|
||||||
}
|
|
||||||
if($reg ne "e1" || $plan9) {
|
|
||||||
$body .= "\t$name = $type($reg)\n";
|
|
||||||
}
|
|
||||||
}
|
|
||||||
if ($ret[0] eq "_" && $ret[1] eq "_" && $ret[2] eq "_") {
|
|
||||||
$text .= "\t$call\n";
|
|
||||||
} else {
|
|
||||||
$text .= "\t$ret[0], $ret[1], $ret[2] := $call\n";
|
|
||||||
}
|
|
||||||
$text .= $body;
|
|
||||||
|
|
||||||
if ($plan9 && $ret[2] eq "e1") {
|
|
||||||
$text .= "\tif int32(r0) == -1 {\n";
|
|
||||||
$text .= "\t\terr = e1\n";
|
|
||||||
$text .= "\t}\n";
|
|
||||||
} elsif ($do_errno) {
|
|
||||||
$text .= "\tif e1 != 0 {\n";
|
|
||||||
$text .= "\t\terr = e1\n";
|
|
||||||
$text .= "\t}\n";
|
|
||||||
}
|
|
||||||
$text .= "\treturn\n";
|
|
||||||
$text .= "}\n\n";
|
|
||||||
}
|
|
||||||
|
|
||||||
chomp $text;
|
|
||||||
chomp $text;
|
|
||||||
|
|
||||||
if($errors) {
|
|
||||||
exit 1;
|
|
||||||
}
|
|
||||||
|
|
||||||
print <<EOF;
|
|
||||||
// $cmdline
|
|
||||||
// Code generated by the command above; DO NOT EDIT.
|
|
||||||
|
|
||||||
package plan9
|
|
||||||
|
|
||||||
import "unsafe"
|
|
||||||
|
|
||||||
$text
|
|
||||||
EOF
|
|
||||||
exit 0;
|
|
||||||
@@ -1,5 +1,7 @@
|
|||||||
// mksyscall.pl -l32 -plan9 syscall_plan9.go
|
// go run mksyscall.go -l32 -plan9 -tags plan9,386 syscall_plan9.go
|
||||||
// Code generated by the command above; DO NOT EDIT.
|
// Code generated by the command above; see README.md. DO NOT EDIT.
|
||||||
|
|
||||||
|
// +build plan9,386
|
||||||
|
|
||||||
package plan9
|
package plan9
|
||||||
|
|
||||||
|
|||||||
@@ -1,5 +1,7 @@
|
|||||||
// mksyscall.pl -l32 -plan9 syscall_plan9.go
|
// go run mksyscall.go -l32 -plan9 -tags plan9,amd64 syscall_plan9.go
|
||||||
// Code generated by the command above; DO NOT EDIT.
|
// Code generated by the command above; see README.md. DO NOT EDIT.
|
||||||
|
|
||||||
|
// +build plan9,amd64
|
||||||
|
|
||||||
package plan9
|
package plan9
|
||||||
|
|
||||||
|
|||||||
@@ -1,5 +1,5 @@
|
|||||||
// mksyscall.pl -l32 -plan9 -tags plan9,arm syscall_plan9.go
|
// go run mksyscall.go -l32 -plan9 -tags plan9,arm syscall_plan9.go
|
||||||
// Code generated by the command above; DO NOT EDIT.
|
// Code generated by the command above; see README.md. DO NOT EDIT.
|
||||||
|
|
||||||
// +build plan9,arm
|
// +build plan9,arm
|
||||||
|
|
||||||
|
|||||||
Reference in New Issue
Block a user