diff options
Diffstat (limited to '')
-rw-r--r-- | dependencies/pkg/mod/golang.org/x/sys@v0.1.0/unix/linux/mksysnum.go | 150 |
1 files changed, 150 insertions, 0 deletions
diff --git a/dependencies/pkg/mod/golang.org/x/sys@v0.1.0/unix/linux/mksysnum.go b/dependencies/pkg/mod/golang.org/x/sys@v0.1.0/unix/linux/mksysnum.go new file mode 100644 index 0000000..ed41ce9 --- /dev/null +++ b/dependencies/pkg/mod/golang.org/x/sys@v0.1.0/unix/linux/mksysnum.go @@ -0,0 +1,150 @@ +// 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. + +//go:build ignore +// +build ignore + +package main + +import ( + "bufio" + "fmt" + "os" + "os/exec" + "regexp" + "strconv" + "strings" +) + +var ( + goos, goarch string +) + +// cmdLine returns this programs's commandline arguments +func cmdLine() string { + return "go run linux/mksysnum.go " + strings.Join(os.Args[1:], " ") +} + +// goBuildTags returns build tags in the go:build format. +func goBuildTags() string { + return fmt.Sprintf("%s && %s", goarch, goos) +} + +// plusBuildTags returns build tags in the +build format. +func plusBuildTags() string { + return fmt.Sprintf("%s,%s", goarch, goos) +} + +func format(name string, num int, offset int) string { + if num > 999 { + // ignore deprecated syscalls that are no longer implemented + // https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/tree/include/uapi/asm-generic/unistd.h?id=refs/heads/master#n716 + return "" + } + name = strings.ToUpper(name) + num = num + offset + return fmt.Sprintf(" SYS_%s = %d;\n", name, num) +} + +func checkErr(err error) { + if err != nil { + fmt.Fprintf(os.Stderr, "%v\n", err) + os.Exit(1) + } +} + +// source string and substring slice for regexp +type re struct { + str string // source string + sub []string // matched sub-string +} + +// Match performs regular expression match +func (r *re) Match(exp string) bool { + r.sub = regexp.MustCompile(exp).FindStringSubmatch(r.str) + if r.sub != nil { + return true + } + return false +} + +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 if GOOS and GOARCH environment variables are defined + if goarch == "" || goos == "" { + fmt.Fprintf(os.Stderr, "GOARCH or GOOS not defined in environment\n") + os.Exit(1) + } + // Check that we are using the new build system if we should + if os.Getenv("GOLANG_SYS_BUILD") != "docker" { + fmt.Fprintf(os.Stderr, "In the new build system, mksysnum should not be called directly.\n") + fmt.Fprintf(os.Stderr, "See README.md\n") + os.Exit(1) + } + + cc := os.Getenv("CC") + if cc == "" { + fmt.Fprintf(os.Stderr, "CC is not defined in environment\n") + os.Exit(1) + } + args := os.Args[1:] + args = append([]string{"-E", "-dD"}, args...) + cmd, err := exec.Command(cc, args...).Output() // execute command and capture output + if err != nil { + fmt.Fprintf(os.Stderr, "can't run %s", cc) + os.Exit(1) + } + text := "" + s := bufio.NewScanner(strings.NewReader(string(cmd))) + var offset, prev int + for s.Scan() { + t := re{str: s.Text()} + if t.Match(`^#define __NR_Linux\s+([0-9]+)`) { + // mips/mips64: extract offset + offset, _ = strconv.Atoi(t.sub[1]) // Make offset=0 if empty or non-numeric + } else if t.Match(`^#define __NR(\w*)_SYSCALL_BASE\s+([0-9]+)`) { + // arm: extract offset + offset, _ = strconv.Atoi(t.sub[1]) // Make offset=0 if empty or non-numeric + } else if t.Match(`^#define __NR_syscalls\s+`) { + // ignore redefinitions of __NR_syscalls + } else if t.Match(`^#define __NR_(\w*)Linux_syscalls\s+`) { + // mips/mips64: ignore definitions about the number of syscalls + } else if t.Match(`^#define __NR_(\w+)\s+([0-9]+)`) { + prev, err = strconv.Atoi(t.sub[2]) + checkErr(err) + text += format(t.sub[1], prev, offset) + } else if t.Match(`^#define __NR3264_(\w+)\s+([0-9]+)`) { + prev, err = strconv.Atoi(t.sub[2]) + checkErr(err) + text += format(t.sub[1], prev, offset) + } else if t.Match(`^#define __NR_(\w+)\s+\(\w+\+\s*([0-9]+)\)`) { + r2, err := strconv.Atoi(t.sub[2]) + checkErr(err) + text += format(t.sub[1], prev+r2, offset) + } else if t.Match(`^#define __NR_(\w+)\s+\(__NR_(?:SYSCALL_BASE|Linux) \+ ([0-9]+)`) { + r2, err := strconv.Atoi(t.sub[2]) + checkErr(err) + text += format(t.sub[1], r2, offset) + } + } + err = s.Err() + checkErr(err) + fmt.Printf(template, cmdLine(), goBuildTags(), plusBuildTags(), text) +} + +const template = `// %s +// Code generated by the command above; see README.md. DO NOT EDIT. + +//go:build %s +// +build %s + +package unix + +const( +%s)` |