mirror of
https://github.com/golang/go
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121 lines
4.0 KiB
Plaintext
121 lines
4.0 KiB
Plaintext
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#!/bin/sh
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# Copyright 2009 The Go Authors. All rights reserved.
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# Use of this source code is governed by a BSD-style
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# license that can be found in the LICENSE file.
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# The syscall package provides access to the raw system call
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# interface of the underlying operating system. Porting Go to
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# a new architecture/operating system combination requires
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# some manual effort, though there are tools that automate
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# much of the process. The auto-generated files have names
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# beginning with z.
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#
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# This script prints suggested commands to generate z files
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# for the current system. Running those commands is not automatic.
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# This script is documentation more than anything else.
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#
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# * asm_${GOOS}_${GOARCH}.s
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#
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# This hand-written assembly file implements system call dispatch.
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# There are three entry points:
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#
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# func Syscall(trap, a1, a2, a3 uintptr) (r1, r2, err uintptr);
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# func Syscall6(trap, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2, err uintptr);
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# func RawSyscall(trap, a1, a2, a3 uintptr) (r1, r2, err uintptr);
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#
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# The first and second are the standard ones; they differ only in
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# how many arguments can be passed to the kernel.
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# The third is for low-level use by the ForkExec wrapper;
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# unlike the first two, it does not call into the scheduler to
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# let it know that a system call is running.
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#
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# * syscall_${GOOS}.go
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#
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# This hand-written Go file implements system calls that need
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# special handling and lists "//sys" comments giving prototypes
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# for ones that can be auto-generated. Mksyscall reads those
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# comments to generate the stubs.
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#
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# * syscall_${GOOS}_${GOARCH}.go
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#
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# Same as syscall_${GOOS}.go except that it contains code specific
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# to ${GOOS} on one particular architecture.
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#
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# * types_${GOOS}.c
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#
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# This hand-written C file includes standard C headers and then
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# creates typedef or enum names beginning with a dollar sign
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# (use of $ in variable names is a gcc extension). The hardest
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# part about preparing this file is figuring out which headers to
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# include and which symbols need to be #defined to get the
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# actual data structures that pass through to the kernel system calls.
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# Some C libraries present alternate versions for binary compatibility
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# and translate them on the way in and out of system calls, but
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# there is almost always a #define that can get the real ones.
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# See types_darwin.c and types_linux.c for examples.
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#
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# * types_${GOOS}_${GOARCH}.c
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#
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# Same as types_${GOOS}_${GOARCH}.go except that it contains
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# definitions specific to ${GOOS} one one particular architecture.
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#
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# * zerror_${GOOS}_${GOARCH}.go
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#
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# This machine-generated file defines the system's error numbers,
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# error strings, and signal numbers. The generator is "mkerrors".
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# Usually no arguments are needed, but mkerrors will pass its
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# arguments on to godefs.
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#
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# * zsyscall_${GOOS}_${GOARCH}.go
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#
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# Generated by mksyscall; see syscall_${GOOS}.go above.
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#
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# * zsysnum_${GOOS}_${GOARCH}.go
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#
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# Generated by mksysnum_${GOOS}.
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#
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# * ztypes_${GOOS}_${GOARCH}.go
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#
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# Generated by godefs; see types_${GOOS}.c above.
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GOOSARCH="${GOOS}_${GOARCH}"
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# defaults
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mksyscall="mksyscall"
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mkerrors="mkerrors"
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case "$GOOSARCH" in
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_* | *_ | _)
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echo 'undefined $GOOS_$GOARCH:' "$GOOSARCH" 1>&2
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exit 1
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;;
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darwin_386)
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mksyscall="mksyscall -l32"
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mksysnum="mksysnum_darwin /home/rsc/pub/xnu-1228/bsd/kern/syscalls.master"
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mktypes="godefs -gsyscall -f-m32"
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;;
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darwin_amd64)
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mksysnum="mksysnum_darwin /home/rsc/pub/xnu-1228/bsd/kern/syscalls.master"
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mktypes="godefs -gsyscall -f-m64"
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mkerrors="mkerrors"
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;;
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linux_amd64)
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mksysnum="mksysnum_linux /usr/include/asm/unistd_64.h"
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mktypes="godefs -gsyscall -f-m64"
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;;
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*)
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echo 'unrecognized $GOOS_$GOARCH: ' "$GOOSARCH" 1>&2
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exit 1
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;;
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esac
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echo "$mkerrors >zerrors_$GOOSARCH.go"
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echo "$mksyscall syscall_$GOOS.go syscall_$GOOSARCH.go >zsyscall_$GOOSARCH.go"
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echo "$mksysnum >zsysnum_$GOOSARCH.go"
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echo "$mktypes types_$GOOS.c types_$GOOSARCH.c >ztypes_$GOOSARCH.go"
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port=$(ls *.go | grep -v _)
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arch=$(ls *_$GOOSARCH.s *_$GOOSARCH.go *_$GOOS.go)
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all=$(ls $port $arch) # sort them
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echo gobuild $all
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