diff options
Diffstat (limited to 'vendor/golang.org/x/sys/unix/mksyscall_aix_ppc.go')
-rw-r--r-- | vendor/golang.org/x/sys/unix/mksyscall_aix_ppc.go | 415 |
1 files changed, 415 insertions, 0 deletions
diff --git a/vendor/golang.org/x/sys/unix/mksyscall_aix_ppc.go b/vendor/golang.org/x/sys/unix/mksyscall_aix_ppc.go new file mode 100644 index 000000000..3be3cdfc3 --- /dev/null +++ b/vendor/golang.org/x/sys/unix/mksyscall_aix_ppc.go @@ -0,0 +1,415 @@ +// Copyright 2019 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_aix.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 err. + * If go func name needs to be different than its libc name, + * or the function is not in libc, name could be specified + * at the end, after "=" sign, like + //sys getsockopt(s int, level int, name int, val uintptr, vallen *_Socklen) (err error) = libsocket.getsockopt +*/ +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") + aix = flag.Bool("aix", false, "aix") + tags = flag.String("tags", "", "build tags") +) + +// cmdLine returns this programs's commandline arguments +func cmdLine() string { + return "go run mksyscall_aix_ppc.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_aix_ppc.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*)$`).FindStringSubmatch(p) + if ps == nil { + fmt.Fprintf(os.Stderr, "malformed parameter: %s\n", p) + os.Exit(1) + } + return Param{ps[1], ps[2]} +} + +func main() { + flag.Usage = usage + flag.Parse() + if len(flag.Args()) <= 0 { + fmt.Fprintf(os.Stderr, "no files to parse provided\n") + usage() + } + + endianness := "" + if *b32 { + endianness = "big-endian" + } else if *l32 { + endianness = "little-endian" + } + + pack := "" + text := "" + cExtern := "/*\n#include <stdint.h>\n#include <stddef.h>\n" + for _, path := range flag.Args() { + file, err := os.Open(path) + if err != nil { + fmt.Fprintf(os.Stderr, err.Error()) + os.Exit(1) + } + s := bufio.NewScanner(file) + for s.Scan() { + t := s.Text() + t = strings.TrimSpace(t) + t = regexp.MustCompile(`\s+`).ReplaceAllString(t, ` `) + if p := regexp.MustCompile(`^package (\S+)$`).FindStringSubmatch(t); p != nil && pack == "" { + pack = p[1] + } + 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, err error) + // Split into name, in params, out params. + f := regexp.MustCompile(`^\/\/sys(nb)? (\w+)\(([^()]*)\)\s*(?:\(([^()]+)\))?\s*(?:=\s*(?:(\w*)\.)?(\w*))?$`).FindStringSubmatch(t) + if f == nil { + fmt.Fprintf(os.Stderr, "%s:%s\nmalformed //sys declaration\n", path, t) + os.Exit(1) + } + funct, inps, outps, modname, sysname := f[2], f[3], f[4], f[5], f[6] + + // Split argument lists on comma. + in := parseParamList(inps) + out := parseParamList(outps) + + inps = strings.Join(in, ", ") + outps = strings.Join(out, ", ") + + // Try in vain to keep people from editing this file. + // The theory is that they jump into the middle of the file + // without reading the header. + text += "// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT\n\n" + + // Check if value return, err return available + errvar := "" + retvar := "" + rettype := "" + for _, param := range out { + p := parseParam(param) + if p.Type == "error" { + errvar = p.Name + } else { + retvar = p.Name + rettype = p.Type + } + } + + // System call name. + if sysname == "" { + sysname = funct + } + sysname = regexp.MustCompile(`([a-z])([A-Z])`).ReplaceAllString(sysname, `${1}_$2`) + sysname = strings.ToLower(sysname) // All libc functions are lowercase. + + cRettype := "" + if rettype == "unsafe.Pointer" { + cRettype = "uintptr_t" + } else if rettype == "uintptr" { + cRettype = "uintptr_t" + } else if regexp.MustCompile(`^_`).FindStringSubmatch(rettype) != nil { + cRettype = "uintptr_t" + } else if rettype == "int" { + cRettype = "int" + } else if rettype == "int32" { + cRettype = "int" + } else if rettype == "int64" { + cRettype = "long long" + } else if rettype == "uint32" { + cRettype = "unsigned int" + } else if rettype == "uint64" { + cRettype = "unsigned long long" + } else { + cRettype = "int" + } + if sysname == "exit" { + cRettype = "void" + } + + // Change p.Types to c + var cIn []string + for _, param := range in { + p := parseParam(param) + if regexp.MustCompile(`^\*`).FindStringSubmatch(p.Type) != nil { + cIn = append(cIn, "uintptr_t") + } else if p.Type == "string" { + cIn = append(cIn, "uintptr_t") + } else if regexp.MustCompile(`^\[\](.*)`).FindStringSubmatch(p.Type) != nil { + cIn = append(cIn, "uintptr_t", "size_t") + } else if p.Type == "unsafe.Pointer" { + cIn = append(cIn, "uintptr_t") + } else if p.Type == "uintptr" { + cIn = append(cIn, "uintptr_t") + } else if regexp.MustCompile(`^_`).FindStringSubmatch(p.Type) != nil { + cIn = append(cIn, "uintptr_t") + } else if p.Type == "int" { + cIn = append(cIn, "int") + } else if p.Type == "int32" { + cIn = append(cIn, "int") + } else if p.Type == "int64" { + cIn = append(cIn, "long long") + } else if p.Type == "uint32" { + cIn = append(cIn, "unsigned int") + } else if p.Type == "uint64" { + cIn = append(cIn, "unsigned long long") + } else { + cIn = append(cIn, "int") + } + } + + if funct != "fcntl" && funct != "FcntlInt" && funct != "readlen" && funct != "writelen" { + if sysname == "select" { + // select is a keyword of Go. Its name is + // changed to c_select. + cExtern += "#define c_select select\n" + } + // Imports of system calls from libc + cExtern += fmt.Sprintf("%s %s", cRettype, sysname) + cIn := strings.Join(cIn, ", ") + cExtern += fmt.Sprintf("(%s);\n", cIn) + } + + // So file name. + if *aix { + if modname == "" { + modname = "libc.a/shr_64.o" + } else { + fmt.Fprintf(os.Stderr, "%s: only syscall using libc are available\n", funct) + os.Exit(1) + } + } + + strconvfunc := "C.CString" + + // Go function header. + if outps != "" { + outps = fmt.Sprintf(" (%s)", outps) + } + if text != "" { + text += "\n" + } + + text += fmt.Sprintf("func %s(%s)%s {\n", funct, strings.Join(in, ", "), outps) + + // Prepare arguments to Syscall. + var args []string + n := 0 + argN := 0 + for _, param := range in { + p := parseParam(param) + if regexp.MustCompile(`^\*`).FindStringSubmatch(p.Type) != nil { + args = append(args, "C.uintptr_t(uintptr(unsafe.Pointer("+p.Name+")))") + } else if p.Type == "string" && errvar != "" { + text += fmt.Sprintf("\t_p%d := uintptr(unsafe.Pointer(%s(%s)))\n", n, strconvfunc, p.Name) + args = append(args, fmt.Sprintf("C.uintptr_t(_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("\t_p%d := uintptr(unsafe.Pointer(%s(%s)))\n", n, strconvfunc, p.Name) + args = append(args, fmt.Sprintf("C.uintptr_t(_p%d)", n)) + n++ + } else if m := regexp.MustCompile(`^\[\](.*)`).FindStringSubmatch(p.Type); m != nil { + // Convert slice into pointer, length. + // Have to be careful not to take address of &a[0] if len == 0: + // pass nil in that case. + text += fmt.Sprintf("\tvar _p%d *%s\n", n, m[1]) + text += fmt.Sprintf("\tif len(%s) > 0 {\n\t\t_p%d = &%s[0]\n\t}\n", p.Name, n, p.Name) + args = append(args, fmt.Sprintf("C.uintptr_t(uintptr(unsafe.Pointer(_p%d)))", n)) + n++ + text += fmt.Sprintf("\tvar _p%d int\n", n) + text += fmt.Sprintf("\t_p%d = len(%s)\n", n, p.Name) + args = append(args, fmt.Sprintf("C.size_t(_p%d)", n)) + n++ + } else if p.Type == "int64" && endianness != "" { + 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)) + } + n++ + } else if p.Type == "bool" { + text += fmt.Sprintf("\tvar _p%d uint32\n", n) + text += fmt.Sprintf("\tif %s {\n\t\t_p%d = 1\n\t} else {\n\t\t_p%d = 0\n\t}\n", p.Name, n, n) + args = append(args, fmt.Sprintf("_p%d", n)) + } else if regexp.MustCompile(`^_`).FindStringSubmatch(p.Type) != nil { + args = append(args, fmt.Sprintf("C.uintptr_t(uintptr(%s))", p.Name)) + } else if p.Type == "unsafe.Pointer" { + args = append(args, fmt.Sprintf("C.uintptr_t(uintptr(%s))", p.Name)) + } else if p.Type == "int" { + if (argN == 2) && ((funct == "readlen") || (funct == "writelen")) { + args = append(args, fmt.Sprintf("C.size_t(%s)", p.Name)) + } else if argN == 0 && funct == "fcntl" { + args = append(args, fmt.Sprintf("C.uintptr_t(%s)", p.Name)) + } else if (argN == 2) && ((funct == "fcntl") || (funct == "FcntlInt")) { + args = append(args, fmt.Sprintf("C.uintptr_t(%s)", p.Name)) + } else { + args = append(args, fmt.Sprintf("C.int(%s)", p.Name)) + } + } else if p.Type == "int32" { + args = append(args, fmt.Sprintf("C.int(%s)", p.Name)) + } else if p.Type == "int64" { + args = append(args, fmt.Sprintf("C.longlong(%s)", p.Name)) + } else if p.Type == "uint32" { + args = append(args, fmt.Sprintf("C.uint(%s)", p.Name)) + } else if p.Type == "uint64" { + args = append(args, fmt.Sprintf("C.ulonglong(%s)", p.Name)) + } else if p.Type == "uintptr" { + args = append(args, fmt.Sprintf("C.uintptr_t(%s)", p.Name)) + } else { + args = append(args, fmt.Sprintf("C.int(%s)", p.Name)) + } + argN++ + } + + // Actual call. + arglist := strings.Join(args, ", ") + call := "" + if sysname == "exit" { + if errvar != "" { + call += "er :=" + } else { + call += "" + } + } else if errvar != "" { + call += "r0,er :=" + } else if retvar != "" { + call += "r0,_ :=" + } else { + call += "" + } + if sysname == "select" { + // select is a keyword of Go. Its name is + // changed to c_select. + call += fmt.Sprintf("C.c_%s(%s)", sysname, arglist) + } else { + call += fmt.Sprintf("C.%s(%s)", sysname, arglist) + } + + // Assign return values. + body := "" + for i := 0; i < len(out); i++ { + p := parseParam(out[i]) + reg := "" + if p.Name == "err" { + reg = "e1" + } else { + reg = "r0" + } + if reg != "e1" { + body += fmt.Sprintf("\t%s = %s(%s)\n", p.Name, p.Type, reg) + } + } + + // verify return + if sysname != "exit" && errvar != "" { + if regexp.MustCompile(`^uintptr`).FindStringSubmatch(cRettype) != nil { + body += "\tif (uintptr(r0) ==^uintptr(0) && er != nil) {\n" + body += fmt.Sprintf("\t\t%s = er\n", errvar) + body += "\t}\n" + } else { + body += "\tif (r0 ==-1 && er != nil) {\n" + body += fmt.Sprintf("\t\t%s = er\n", errvar) + body += "\t}\n" + } + } else if errvar != "" { + body += "\tif (er != nil) {\n" + body += fmt.Sprintf("\t\t%s = er\n", errvar) + body += "\t}\n" + } + + text += fmt.Sprintf("\t%s\n", call) + text += body + + text += "\treturn\n" + text += "}\n" + } + if err := s.Err(); err != nil { + fmt.Fprintf(os.Stderr, err.Error()) + os.Exit(1) + } + file.Close() + } + imp := "" + if pack != "unix" { + imp = "import \"golang.org/x/sys/unix\"\n" + + } + fmt.Printf(srcTemplate, cmdLine(), buildTags(), pack, cExtern, imp, text) +} + +const srcTemplate = `// %s +// Code generated by the command above; see README.md. DO NOT EDIT. + +// +build %s + +package %s + + +%s +*/ +import "C" +import ( + "unsafe" +) + + +%s + +%s +` |