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c79a742fd1381a2ee32d28c5d97bbc19de34d54a
sys/unix/mkall.sh
Joel Sing 7c6badcd7c unix: convert openbsd/mips64 to direct libc calls 
The current code has continued to work on OpenBSD, since it has been using
syscall(2) via libc. However, the system call numbers are still hardcoded in
golang.org/x/sys/unix. Various system call changes have been made in OpenBSD,
resulting in changes to the system call numbers and arguments, which now
fail when this package is used.

Switch to calling various system calls directly via libc, rather than calling
via libc using syscall(2).

Unfortunately, this will no longer work on upstream Go since the changes
needed to convert it to libc are still blocked pending review. This means
that we're in a less than ideal situation where upstream Go openbsd/mips64
does not work on any supported OpenBSD release (in fact has not since
OpenBSD 6.8, which was EOL over a year ago), however golang.org/x/sys/unix
is now unusable with the Go package that ships with supported releases via
OpenBSD ports. It would seem that being able to actually use Go software on
a supported OpenBSD release trumps maintaining compatibility with the
unusable upstream Go source.

Updates golang/go#36435

Change-Id: Id8947cd0e4e05709e96c3d4478ac8789b924d416
Reviewed-on: https://go-review.googlesource.com/c/sys/+/459497
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
Reviewed-by: Tobias Klauser <tobias.klauser@gmail.com>
Reviewed-by: Ian Lance Taylor <iant@google.com>
Run-TryBot: Ian Lance Taylor <iant@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
2022-12-30 16:58:14 +00:00

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#!/usr/bin/env bash
# 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 script runs or (given -n) prints suggested commands to generate files for
# the Architecture/OS specified by the GOARCH and GOOS environment variables.
# See README.md for more information about how the build system works.
GOOSARCH="${GOOS}_${GOARCH}"
# defaults
mksyscall="go run mksyscall.go"
mkerrors="./mkerrors.sh"
zerrors="zerrors_$GOOSARCH.go"
mksysctl=""
zsysctl="zsysctl_$GOOSARCH.go"
mksysnum=
mktypes=
mkasm=
run="sh"
cmd=""
case "$1" in
-syscalls)
for i in zsyscall*go
do
# Run the command line that appears in the first line
# of the generated file to regenerate it.
sed 1q $i | sed 's;^// ;;' | sh > _$i && gofmt < _$i > $i
rm _$i
done
exit 0
;;
-n)
run="cat"
cmd="echo"
shift
esac
case "$#" in
0)
;;
*)
echo 'usage: mkall.sh [-n]' 1>&2
exit 2
esac
if [[ "$GOOS" = "linux" ]]; then
# Use the Docker-based build system
# Files generated through docker (use $cmd so you can Ctl-C the build or run)
$cmd docker build --tag generate:$GOOS $GOOS
$cmd docker run --interactive --tty --volume $(cd -- "$(dirname -- "$0")/.." && /bin/pwd):/build generate:$GOOS
exit
fi
GOOSARCH_in=syscall_$GOOSARCH.go
case "$GOOSARCH" in
_* | *_ | _)
echo 'undefined $GOOS_$GOARCH:' "$GOOSARCH" 1>&2
exit 1
;;
aix_ppc)
mkerrors="$mkerrors -maix32"
mksyscall="go run mksyscall_aix_ppc.go -aix"
mktypes="GOARCH=$GOARCH go tool cgo -godefs"
;;
aix_ppc64)
mkerrors="$mkerrors -maix64"
mksyscall="go run mksyscall_aix_ppc64.go -aix"
mktypes="GOARCH=$GOARCH go tool cgo -godefs"
;;
darwin_amd64)
mkerrors="$mkerrors -m64"
mktypes="GOARCH=$GOARCH go tool cgo -godefs"
mkasm="go run mkasm.go"
;;
darwin_arm64)
mkerrors="$mkerrors -m64"
mktypes="GOARCH=$GOARCH go tool cgo -godefs"
mkasm="go run mkasm.go"
;;
dragonfly_amd64)
mkerrors="$mkerrors -m64"
mksyscall="go run mksyscall.go -dragonfly"
mksysnum="go run mksysnum.go 'https://gitweb.dragonflybsd.org/dragonfly.git/blob_plain/HEAD:/sys/kern/syscalls.master'"
mktypes="GOARCH=$GOARCH go tool cgo -godefs"
;;
freebsd_386)
mkerrors="$mkerrors -m32"
mksyscall="go run mksyscall.go -l32"
mksysnum="go run mksysnum.go 'https://cgit.freebsd.org/src/plain/sys/kern/syscalls.master?h=stable/12'"
mktypes="GOARCH=$GOARCH go tool cgo -godefs"
;;
freebsd_amd64)
mkerrors="$mkerrors -m64"
mksysnum="go run mksysnum.go 'https://cgit.freebsd.org/src/plain/sys/kern/syscalls.master?h=stable/12'"
mktypes="GOARCH=$GOARCH go tool cgo -godefs"
;;
freebsd_arm)
mkerrors="$mkerrors"
mksyscall="go run mksyscall.go -l32 -arm"
mksysnum="go run mksysnum.go 'https://cgit.freebsd.org/src/plain/sys/kern/syscalls.master?h=stable/12'"
# Let the type of C char be signed for making the bare syscall
# API consistent across platforms.
mktypes="GOARCH=$GOARCH go tool cgo -godefs -- -fsigned-char"
;;
freebsd_arm64)
mkerrors="$mkerrors -m64"
mksysnum="go run mksysnum.go 'https://cgit.freebsd.org/src/plain/sys/kern/syscalls.master?h=stable/12'"
mktypes="GOARCH=$GOARCH go tool cgo -godefs -- -fsigned-char"
;;
freebsd_riscv64)
mkerrors="$mkerrors -m64"
mksysnum="go run mksysnum.go 'https://cgit.freebsd.org/src/plain/sys/kern/syscalls.master?h=stable/12'"
mktypes="GOARCH=$GOARCH go tool cgo -godefs -- -fsigned-char"
;;
netbsd_386)
mkerrors="$mkerrors -m32"
mksyscall="go run mksyscall.go -l32 -netbsd"
mksysnum="go run mksysnum.go 'http://cvsweb.netbsd.org/bsdweb.cgi/~checkout~/src/sys/kern/syscalls.master'"
mktypes="GOARCH=$GOARCH go tool cgo -godefs"
;;
netbsd_amd64)
mkerrors="$mkerrors -m64"
mksyscall="go run mksyscall.go -netbsd"
mksysnum="go run mksysnum.go 'http://cvsweb.netbsd.org/bsdweb.cgi/~checkout~/src/sys/kern/syscalls.master'"
mktypes="GOARCH=$GOARCH go tool cgo -godefs"
;;
netbsd_arm)
mkerrors="$mkerrors"
mksyscall="go run mksyscall.go -l32 -netbsd -arm"
mksysnum="go run mksysnum.go 'http://cvsweb.netbsd.org/bsdweb.cgi/~checkout~/src/sys/kern/syscalls.master'"
# Let the type of C char be signed for making the bare syscall
# API consistent across platforms.
mktypes="GOARCH=$GOARCH go tool cgo -godefs -- -fsigned-char"
;;
netbsd_arm64)
mkerrors="$mkerrors -m64"
mksyscall="go run mksyscall.go -netbsd"
mksysnum="go run mksysnum.go 'http://cvsweb.netbsd.org/bsdweb.cgi/~checkout~/src/sys/kern/syscalls.master'"
mktypes="GOARCH=$GOARCH go tool cgo -godefs"
;;
openbsd_386)
mkasm="go run mkasm.go"
mkerrors="$mkerrors -m32"
mksyscall="go run mksyscall.go -l32 -openbsd -libc"
mksysctl="go run mksysctl_openbsd.go"
mktypes="GOARCH=$GOARCH go tool cgo -godefs"
;;
openbsd_amd64)
mkasm="go run mkasm.go"
mkerrors="$mkerrors -m64"
mksyscall="go run mksyscall.go -openbsd -libc"
mksysctl="go run mksysctl_openbsd.go"
mktypes="GOARCH=$GOARCH go tool cgo -godefs"
;;
openbsd_arm)
mkasm="go run mkasm.go"
mkerrors="$mkerrors"
mksyscall="go run mksyscall.go -l32 -openbsd -arm -libc"
mksysctl="go run mksysctl_openbsd.go"
# Let the type of C char be signed for making the bare syscall
# API consistent across platforms.
mktypes="GOARCH=$GOARCH go tool cgo -godefs -- -fsigned-char"
;;
openbsd_arm64)
mkasm="go run mkasm.go"
mkerrors="$mkerrors -m64"
mksyscall="go run mksyscall.go -openbsd -libc"
mksysctl="go run mksysctl_openbsd.go"
# Let the type of C char be signed for making the bare syscall
# API consistent across platforms.
mktypes="GOARCH=$GOARCH go tool cgo -godefs -- -fsigned-char"
;;
openbsd_mips64)
mkasm="go run mkasm.go"
mkerrors="$mkerrors -m64"
mksyscall="go run mksyscall.go -openbsd -libc"
mksysctl="go run mksysctl_openbsd.go"
# Let the type of C char be signed for making the bare syscall
# API consistent across platforms.
mktypes="GOARCH=$GOARCH go tool cgo -godefs -- -fsigned-char"
;;
openbsd_ppc64)
mkasm="go run mkasm.go"
mkerrors="$mkerrors -m64"
mksyscall="go run mksyscall.go -openbsd -libc"
mksysctl="go run mksysctl_openbsd.go"
# Let the type of C char be signed for making the bare syscall
# API consistent across platforms.
mktypes="GOARCH=$GOARCH go tool cgo -godefs -- -fsigned-char"
;;
openbsd_riscv64)
mkasm="go run mkasm.go"
mkerrors="$mkerrors -m64"
mksyscall="go run mksyscall.go -openbsd -libc"
mksysctl="go run mksysctl_openbsd.go"
# Let the type of C char be signed for making the bare syscall
# API consistent across platforms.
mktypes="GOARCH=$GOARCH go tool cgo -godefs -- -fsigned-char"
;;
solaris_amd64)
mksyscall="go run mksyscall_solaris.go"
mkerrors="$mkerrors -m64"
mksysnum=
mktypes="GOARCH=$GOARCH go tool cgo -godefs"
;;
illumos_amd64)
mksyscall="go run mksyscall_solaris.go"
mkerrors=
mksysnum=
mktypes="GOARCH=$GOARCH go tool cgo -godefs"
;;
*)
echo 'unrecognized $GOOS_$GOARCH: ' "$GOOSARCH" 1>&2
exit 1
;;
esac
(
if [ -n "$mkerrors" ]; then echo "$mkerrors |gofmt >$zerrors"; fi
case "$GOOS" in
*)
syscall_goos="syscall_$GOOS.go"
case "$GOOS" in
darwin | dragonfly | freebsd | netbsd | openbsd)
syscall_goos="syscall_bsd.go $syscall_goos"
;;
esac
if [ -n "$mksyscall" ]; then
if [ "$GOOSARCH" == "aix_ppc64" ]; then
# aix/ppc64 script generates files instead of writing to stdin.
echo "$mksyscall -tags $GOOS,$GOARCH $syscall_goos $GOOSARCH_in && gofmt -w zsyscall_$GOOSARCH.go && gofmt -w zsyscall_"$GOOSARCH"_gccgo.go && gofmt -w zsyscall_"$GOOSARCH"_gc.go " ;
elif [ "$GOOS" == "illumos" ]; then
# illumos code generation requires a --illumos switch
echo "$mksyscall -illumos -tags illumos,$GOARCH syscall_illumos.go |gofmt > zsyscall_illumos_$GOARCH.go";
# illumos implies solaris, so solaris code generation is also required
echo "$mksyscall -tags solaris,$GOARCH syscall_solaris.go syscall_solaris_$GOARCH.go |gofmt >zsyscall_solaris_$GOARCH.go";
else
echo "$mksyscall -tags $GOOS,$GOARCH $syscall_goos $GOOSARCH_in |gofmt >zsyscall_$GOOSARCH.go";
fi
fi
esac
if [ -n "$mksysctl" ]; then echo "$mksysctl |gofmt >$zsysctl"; fi
if [ -n "$mksysnum" ]; then echo "$mksysnum |gofmt >zsysnum_$GOOSARCH.go"; fi
if [ -n "$mktypes" ]; then echo "$mktypes types_$GOOS.go | go run mkpost.go > ztypes_$GOOSARCH.go"; fi
if [ -n "$mkasm" ]; then echo "$mkasm $GOOS $GOARCH"; fi
) | $run
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