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33267e036fd93fcd26ea95b7bdaf2d8306cb743c
sys/unix/mkall.sh
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Michael Munday 33267e036f unix: add s390x support 
This commit adds linux/s390x support to the unix package. It is
based on the changes made to the syscall package in
https://golang.org/cl/20961/. It also adds mkpost.go which is
used to cleanup the API generated by cgo -godefs.

The biggest departure that is made with the syscall package is
the use of the -fsigned-char flag to force signed chars. We
couldn't do this in the syscall package because of the need to
maintain compatibility with the gccgo implementation of the syscall
package (gccgo has supported s390x for a longer time than the Go
toolchain). The unix package does not have this constraint.

Using the -fsigned-char flag makes the API look more like the one
generated on amd64 and arm64 and also more consistent with itself
(the syscall package represents chars using both int8 and uint8
types, the sys package will only ever use int8). Unfortunately it
also means that applications transitioning from the syscall package
to the unix package will see a different API on s390x which might
be confusing. I think the tradeoff is worth it though.

Change-Id: I40b90c18ed787e74ba7a2ebd004bd6bd1ba6279a
Reviewed-on: https://go-review.googlesource.com/23045
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2016-05-13 18:30:25 +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.
# The unix package provides access to the raw system call
# interface of the underlying operating system. Porting Go to
# a new architecture/operating system combination requires
# some manual effort, though there are tools that automate
# much of the process. The auto-generated files have names
# beginning with z.
#
# This script runs or (given -n) prints suggested commands to generate z files
# for the current system. Running those commands is not automatic.
# This script is documentation more than anything else.
#
# * asm_${GOOS}_${GOARCH}.s
#
# This hand-written assembly file implements system call dispatch.
# There are three entry points:
#
# func Syscall(trap, a1, a2, a3 uintptr) (r1, r2, err uintptr);
# func Syscall6(trap, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2, err uintptr);
# func RawSyscall(trap, a1, a2, a3 uintptr) (r1, r2, err uintptr);
#
# The first and second are the standard ones; they differ only in
# how many arguments can be passed to the kernel.
# The third is for low-level use by the ForkExec wrapper;
# unlike the first two, it does not call into the scheduler to
# let it know that a system call is running.
#
# * syscall_${GOOS}.go
#
# This hand-written Go file implements system calls that need
# special handling and lists "//sys" comments giving prototypes
# for ones that can be auto-generated. Mksyscall reads those
# comments to generate the stubs.
#
# * syscall_${GOOS}_${GOARCH}.go
#
# Same as syscall_${GOOS}.go except that it contains code specific
# to ${GOOS} on one particular architecture.
#
# * types_${GOOS}.c
#
# This hand-written C file includes standard C headers and then
# creates typedef or enum names beginning with a dollar sign
# (use of $ in variable names is a gcc extension). The hardest
# part about preparing this file is figuring out which headers to
# include and which symbols need to be #defined to get the
# actual data structures that pass through to the kernel system calls.
# Some C libraries present alternate versions for binary compatibility
# and translate them on the way in and out of system calls, but
# there is almost always a #define that can get the real ones.
# See types_darwin.c and types_linux.c for examples.
#
# * zerror_${GOOS}_${GOARCH}.go
#
# This machine-generated file defines the system's error numbers,
# error strings, and signal numbers. The generator is "mkerrors.sh".
# Usually no arguments are needed, but mkerrors.sh will pass its
# arguments on to godefs.
#
# * zsyscall_${GOOS}_${GOARCH}.go
#
# Generated by mksyscall.pl; see syscall_${GOOS}.go above.
#
# * zsysnum_${GOOS}_${GOARCH}.go
#
# Generated by mksysnum_${GOOS}.
#
# * ztypes_${GOOS}_${GOARCH}.go
#
# Generated by godefs; see types_${GOOS}.c above.
GOOSARCH="${GOOS}_${GOARCH}"
# defaults
mksyscall="./mksyscall.pl"
mkerrors="./mkerrors.sh"
zerrors="zerrors_$GOOSARCH.go"
mksysctl=""
zsysctl="zsysctl_$GOOSARCH.go"
mksysnum=
mktypes=
run="sh"
case "$1" in
-syscalls)
for i in zsyscall*go
do
sed 1q $i | sed 's;^// ;;' | sh > _$i && gofmt < _$i > $i
rm _$i
done
exit 0
;;
-n)
run="cat"
shift
esac
case "$#" in
0)
;;
*)
echo 'usage: mkall.sh [-n]' 1>&2
exit 2
esac
GOOSARCH_in=syscall_$GOOSARCH.go
case "$GOOSARCH" in
_* | *_ | _)
echo 'undefined $GOOS_$GOARCH:' "$GOOSARCH" 1>&2
exit 1
;;
darwin_386)
mkerrors="$mkerrors -m32"
mksyscall="./mksyscall.pl -l32"
mksysnum="./mksysnum_darwin.pl $(xcrun --show-sdk-path --sdk macosx)/usr/include/sys/syscall.h"
mktypes="GOARCH=$GOARCH go tool cgo -godefs"
;;
darwin_amd64)
mkerrors="$mkerrors -m64"
mksysnum="./mksysnum_darwin.pl $(xcrun --show-sdk-path --sdk macosx)/usr/include/sys/syscall.h"
mktypes="GOARCH=$GOARCH go tool cgo -godefs"
;;
darwin_arm)
mkerrors="$mkerrors"
mksysnum="./mksysnum_darwin.pl /usr/include/sys/syscall.h"
mktypes="GOARCH=$GOARCH go tool cgo -godefs"
;;
darwin_arm64)
mkerrors="$mkerrors -m64"
mksysnum="./mksysnum_darwin.pl $(xcrun --show-sdk-path --sdk iphoneos)/usr/include/sys/syscall.h"
mktypes="GOARCH=$GOARCH go tool cgo -godefs"
;;
dragonfly_386)
mkerrors="$mkerrors -m32"
mksyscall="./mksyscall.pl -l32 -dragonfly"
mksysnum="curl -s 'http://gitweb.dragonflybsd.org/dragonfly.git/blob_plain/HEAD:/sys/kern/syscalls.master' | ./mksysnum_dragonfly.pl"
mktypes="GOARCH=$GOARCH go tool cgo -godefs"
;;
dragonfly_amd64)
mkerrors="$mkerrors -m64"
mksyscall="./mksyscall.pl -dragonfly"
mksysnum="curl -s 'http://gitweb.dragonflybsd.org/dragonfly.git/blob_plain/HEAD:/sys/kern/syscalls.master' | ./mksysnum_dragonfly.pl"
mktypes="GOARCH=$GOARCH go tool cgo -godefs"
;;
freebsd_386)
mkerrors="$mkerrors -m32"
mksyscall="./mksyscall.pl -l32"
mksysnum="curl -s 'http://svn.freebsd.org/base/stable/10/sys/kern/syscalls.master' | ./mksysnum_freebsd.pl"
mktypes="GOARCH=$GOARCH go tool cgo -godefs"
;;
freebsd_amd64)
mkerrors="$mkerrors -m64"
mksysnum="curl -s 'http://svn.freebsd.org/base/stable/10/sys/kern/syscalls.master' | ./mksysnum_freebsd.pl"
mktypes="GOARCH=$GOARCH go tool cgo -godefs"
;;
freebsd_arm)
mkerrors="$mkerrors"
mksyscall="./mksyscall.pl -l32 -arm"
mksysnum="curl -s 'http://svn.freebsd.org/base/stable/10/sys/kern/syscalls.master' | ./mksysnum_freebsd.pl"
# Let the type of C char be singed for making the bare syscall
# API consistent across over platforms.
mktypes="GOARCH=$GOARCH go tool cgo -godefs -- -fsigned-char"
;;
linux_386)
mkerrors="$mkerrors -m32"
mksyscall="./mksyscall.pl -l32"
mksysnum="./mksysnum_linux.pl /usr/include/asm/unistd_32.h"
mktypes="GOARCH=$GOARCH go tool cgo -godefs"
;;
linux_amd64)
unistd_h=$(ls -1 /usr/include/asm/unistd_64.h /usr/include/x86_64-linux-gnu/asm/unistd_64.h 2>/dev/null | head -1)
if [ "$unistd_h" = "" ]; then
echo >&2 cannot find unistd_64.h
exit 1
fi
mkerrors="$mkerrors -m64"
mksysnum="./mksysnum_linux.pl $unistd_h"
mktypes="GOARCH=$GOARCH go tool cgo -godefs"
;;
linux_arm)
mkerrors="$mkerrors"
mksyscall="./mksyscall.pl -l32 -arm"
mksysnum="curl -s 'http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/plain/arch/arm/include/uapi/asm/unistd.h' | ./mksysnum_linux.pl -"
mktypes="GOARCH=$GOARCH go tool cgo -godefs"
;;
linux_arm64)
unistd_h=$(ls -1 /usr/include/asm/unistd.h /usr/include/asm-generic/unistd.h 2>/dev/null | head -1)
if [ "$unistd_h" = "" ]; then
echo >&2 cannot find unistd_64.h
exit 1
fi
mksysnum="./mksysnum_linux.pl $unistd_h"
# Let the type of C char be singed for making the bare syscall
# API consistent across over platforms.
mktypes="GOARCH=$GOARCH go tool cgo -godefs -- -fsigned-char"
;;
linux_ppc64)
GOOSARCH_in=syscall_linux_ppc64x.go
unistd_h=/usr/include/asm/unistd.h
mkerrors="$mkerrors -m64"
mksysnum="./mksysnum_linux.pl $unistd_h"
mktypes="GOARCH=$GOARCH go tool cgo -godefs"
;;
linux_ppc64le)
GOOSARCH_in=syscall_linux_ppc64x.go
unistd_h=/usr/include/powerpc64le-linux-gnu/asm/unistd.h
mkerrors="$mkerrors -m64"
mksysnum="./mksysnum_linux.pl $unistd_h"
mktypes="GOARCH=$GOARCH go tool cgo -godefs"
;;
linux_s390x)
GOOSARCH_in=syscall_linux_s390x.go
unistd_h=/usr/include/asm/unistd.h
mkerrors="$mkerrors -m64"
mksysnum="./mksysnum_linux.pl $unistd_h"
# Let the type of C char be signed to make the bare sys
# API more consistent between platforms.
# This is a deliberate departure from the way the syscall
# package generates its version of the types file.
mktypes="GOARCH=$GOARCH go tool cgo -godefs -- -fsigned-char"
;;
netbsd_386)
mkerrors="$mkerrors -m32"
mksyscall="./mksyscall.pl -l32 -netbsd"
mksysnum="curl -s 'http://cvsweb.netbsd.org/bsdweb.cgi/~checkout~/src/sys/kern/syscalls.master' | ./mksysnum_netbsd.pl"
mktypes="GOARCH=$GOARCH go tool cgo -godefs"
;;
netbsd_amd64)
mkerrors="$mkerrors -m64"
mksyscall="./mksyscall.pl -netbsd"
mksysnum="curl -s 'http://cvsweb.netbsd.org/bsdweb.cgi/~checkout~/src/sys/kern/syscalls.master' | ./mksysnum_netbsd.pl"
mktypes="GOARCH=$GOARCH go tool cgo -godefs"
;;
openbsd_386)
mkerrors="$mkerrors -m32"
mksyscall="./mksyscall.pl -l32 -openbsd"
mksysctl="./mksysctl_openbsd.pl"
zsysctl="zsysctl_openbsd.go"
mksysnum="curl -s 'http://cvsweb.openbsd.org/cgi-bin/cvsweb/~checkout~/src/sys/kern/syscalls.master' | ./mksysnum_openbsd.pl"
mktypes="GOARCH=$GOARCH go tool cgo -godefs"
;;
openbsd_amd64)
mkerrors="$mkerrors -m64"
mksyscall="./mksyscall.pl -openbsd"
mksysctl="./mksysctl_openbsd.pl"
zsysctl="zsysctl_openbsd.go"
mksysnum="curl -s 'http://cvsweb.openbsd.org/cgi-bin/cvsweb/~checkout~/src/sys/kern/syscalls.master' | ./mksysnum_openbsd.pl"
mktypes="GOARCH=$GOARCH go tool cgo -godefs"
;;
solaris_amd64)
mksyscall="./mksyscall_solaris.pl"
mkerrors="$mkerrors -m64"
mksysnum=
mktypes="GOARCH=$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 echo "$mksyscall $syscall_goos $GOOSARCH_in |gofmt >zsyscall_$GOOSARCH.go"; 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 "echo // +build $GOARCH,$GOOS > ztypes_$GOOSARCH.go";
echo "$mktypes types_$GOOS.go | go run mkpost.go >>ztypes_$GOOSARCH.go";
fi
) | $run
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