source: code/trunk/vendor/golang.org/x/sys/plan9/mkall.sh@ 822

#!/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 plan9 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="go run mksyscall.go"
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

case "$GOOSARCH" in
_* | *_ | _)
        echo 'undefined $GOOS_$GOARCH:' "$GOOSARCH" 1>&2
        exit 1
        ;;
plan9_386)
        mkerrors=
        mksyscall="go run mksyscall.go -l32 -plan9 -tags plan9,386"
        mksysnum="./mksysnum_plan9.sh /n/sources/plan9/sys/src/libc/9syscall/sys.h"
        mktypes="XXX"
        ;;
plan9_amd64)
        mkerrors=
        mksyscall="go run mksyscall.go -l32 -plan9 -tags plan9,amd64"
        mksysnum="./mksysnum_plan9.sh /n/sources/plan9/sys/src/libc/9syscall/sys.h"
        mktypes="XXX"
        ;;
plan9_arm)
        mkerrors=
        mksyscall="go run mksyscall.go -l32 -plan9 -tags plan9,arm"
        mksysnum="./mksysnum_plan9.sh /n/sources/plan9/sys/src/libc/9syscall/sys.h"
        mktypes="XXX"
        ;;
*)
        echo 'unrecognized $GOOS_$GOARCH: ' "$GOOSARCH" 1>&2
        exit 1
        ;;
esac

(
        if [ -n "$mkerrors" ]; then echo "$mkerrors |gofmt >$zerrors"; fi
        case "$GOOS" in
        plan9)
                syscall_goos="syscall_$GOOS.go"
                if [ -n "$mksyscall" ]; then echo "$mksyscall $syscall_goos |gofmt >zsyscall_$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 "$mktypes" ]; then echo "$mktypes types_$GOOS.go |gofmt >ztypes_$GOOSARCH.go"; fi
) | $run