1 files changed, 82 insertions, 0 deletions
diff --git a/src/syscall/mkpost.go b/src/syscall/mkpost.go
new file mode 100644
index 0000000..48d3511
--- /dev/null
+++ b/src/syscall/mkpost.go
@@ -0,0 +1,82 @@
+// Copyright 2016 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
+
+// mkpost processes the output of cgo -godefs to
+// modify the generated types. It is used to clean up
+// the syscall API in an architecture specific manner.
+//
+// mkpost is run after cgo -godefs by mkall.sh.
+package main
+
+import (
+	"fmt"
+	"go/format"
+	"io"
+	"log"
+	"os"
+	"regexp"
+	"strings"
+)
+
+func main() {
+	b, err := io.ReadAll(os.Stdin)
+	if err != nil {
+		log.Fatal(err)
+	}
+	s := string(b)
+
+	goarch := os.Getenv("GOARCH")
+	goos := os.Getenv("GOOS")
+	switch {
+	case goarch == "s390x" && goos == "linux":
+		// Export the types of PtraceRegs fields.
+		re := regexp.MustCompile("ptrace(Psw|Fpregs|Per)")
+		s = re.ReplaceAllString(s, "Ptrace$1")
+
+		// Replace padding fields inserted by cgo with blank identifiers.
+		re = regexp.MustCompile("Pad_cgo[A-Za-z0-9_]*")
+		s = re.ReplaceAllString(s, "_")
+
+		// We want to keep the X_ fields that are already consistently exported
+		// for the other linux GOARCH settings.
+		// Hide them and restore later.
+		s = strings.Replace(s, "X__val", "MKPOSTFSIDVAL", 1)
+		s = strings.Replace(s, "X__ifi_pad", "MKPOSTIFIPAD", 1)
+		s = strings.Replace(s, "X_f", "MKPOSTSYSINFOTF", 1)
+
+		// Replace other unwanted fields with blank identifiers.
+		re = regexp.MustCompile("X_[A-Za-z0-9_]*")
+		s = re.ReplaceAllString(s, "_")
+
+		// Restore preserved fields.
+		s = strings.Replace(s, "MKPOSTFSIDVAL", "X__val", 1)
+		s = strings.Replace(s, "MKPOSTIFIPAD", "X__ifi_pad", 1)
+		s = strings.Replace(s, "MKPOSTSYSINFOTF", "X_f", 1)
+
+		// Force the type of RawSockaddr.Data to [14]int8 to match
+		// the existing gccgo API.
+		re = regexp.MustCompile("(Data\\s+\\[14\\])uint8")
+		s = re.ReplaceAllString(s, "${1}int8")
+
+	case goos == "freebsd":
+		// Keep pre-FreeBSD 10 / non-POSIX 2008 names for timespec fields
+		re := regexp.MustCompile("(A|M|C|Birth)tim\\s+Timespec")
+		s = re.ReplaceAllString(s, "${1}timespec Timespec")
+	}
+
+	// gofmt
+	b, err = format.Source([]byte(s))
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	// Append this command to the header to show where the new file
+	// came from.
+	re := regexp.MustCompile("(cgo -godefs [a-zA-Z0-9_]+\\.go.*)")
+	s = re.ReplaceAllString(string(b), "$1 | go run mkpost.go")
+
+	fmt.Print(s)
+}