github.com/orangeji11/golang-sys-sw64@v0.0.0-20221228054527-b72799809e00/unix/mkpost_sw64.go (about) 1 // Copyright 2016 The Go Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style 3 // license that can be found in the LICENSE file. 4 5 // +build ignore 6 7 // mkpost processes the output of cgo -godefs to 8 // modify the generated types. It is used to clean up 9 // the sys API in an architecture specific manner. 10 // 11 // mkpost is run after cgo -godefs; see README.md. 12 package main 13 14 import ( 15 "bytes" 16 "fmt" 17 "go/format" 18 "io/ioutil" 19 "log" 20 "os" 21 "regexp" 22 ) 23 24 func main() { 25 // Get the OS and architecture (using GOARCH_TARGET if it exists) 26 goos := "linux" 27 goarch := "sw64" 28 b, err := ioutil.ReadAll(os.Stdin) 29 if err != nil { 30 log.Fatal(err) 31 } 32 33 // Intentionally export __val fields in Fsid and Sigset_t 34 valRegex := regexp.MustCompile(`type (Fsid|Sigset_t) struct {(\s+)X__val(\s+\S+\s+)}`) 35 b = valRegex.ReplaceAll(b, []byte("type $1 struct {${2}Val$3}")) 36 37 // Intentionally export __fds_bits field in FdSet 38 fdSetRegex := regexp.MustCompile(`type (FdSet) struct {(\s+)X__fds_bits(\s+\S+\s+)}`) 39 b = fdSetRegex.ReplaceAll(b, []byte("type $1 struct {${2}Bits$3}")) 40 41 // If we have empty Ptrace structs, we should delete them. Only s390x emits 42 // nonempty Ptrace structs. 43 ptraceRexexp := regexp.MustCompile(`type Ptrace((Psw|Fpregs|Per) struct {\s*})`) 44 b = ptraceRexexp.ReplaceAll(b, nil) 45 46 // Replace the control_regs union with a blank identifier for now. 47 controlRegsRegex := regexp.MustCompile(`(Control_regs)\s+\[0\]uint64`) 48 b = controlRegsRegex.ReplaceAll(b, []byte("_ [0]uint64")) 49 50 // Remove fields that are added by glibc 51 // Note that this is unstable as the identifers are private. 52 removeFieldsRegex := regexp.MustCompile(`X__glibc\S*`) 53 b = removeFieldsRegex.ReplaceAll(b, []byte("_")) 54 55 // Convert [65]int8 to [65]byte in Utsname members to simplify 56 // conversion to string; see golang.org/issue/20753 57 convertUtsnameRegex := regexp.MustCompile(`((Sys|Node|Domain)name|Release|Version|Machine)(\s+)\[(\d+)\]u?int8`) 58 b = convertUtsnameRegex.ReplaceAll(b, []byte("$1$3[$4]byte")) 59 60 // Convert [1024]int8 to [1024]byte in Ptmget members 61 convertPtmget := regexp.MustCompile(`([SC]n)(\s+)\[(\d+)\]u?int8`) 62 b = convertPtmget.ReplaceAll(b, []byte("$1[$3]byte")) 63 64 // Remove spare fields (e.g. in Statx_t) 65 spareFieldsRegex := regexp.MustCompile(`X__spare\S*`) 66 b = spareFieldsRegex.ReplaceAll(b, []byte("_")) 67 68 // Remove cgo padding fields 69 removePaddingFieldsRegex := regexp.MustCompile(`Pad_cgo_\d+`) 70 b = removePaddingFieldsRegex.ReplaceAll(b, []byte("_")) 71 72 // Remove padding, hidden, or unused fields 73 removeFieldsRegex = regexp.MustCompile(`\b(X_\S+|Padding)`) 74 b = removeFieldsRegex.ReplaceAll(b, []byte("_")) 75 76 // Remove the first line of warning from cgo 77 b = b[bytes.IndexByte(b, '\n')+1:] 78 // Modify the command in the header to include: 79 // mkpost, our own warning, and a build tag. 80 replacement := fmt.Sprintf(`$1 | go run mkpost.go 81 // Code generated by the command above; see README.md. DO NOT EDIT. 82 83 // +build %s,%s`, goarch, goos) 84 cgoCommandRegex := regexp.MustCompile(`(cgo -godefs .*)`) 85 b = cgoCommandRegex.ReplaceAll(b, []byte(replacement)) 86 87 // gofmt 88 b, err = format.Source(b) 89 if err != nil { 90 log.Fatal(err) 91 } 92 93 os.Stdout.Write(b) 94 }