github.com/megatontech/mynoteforgo@v0.0.0-20200507084910-5d0c6ea6e890/源码/syscall/mkall.sh (about)

     1  #!/usr/bin/env bash
     2  # Copyright 2009 The Go Authors. All rights reserved.
     3  # Use of this source code is governed by a BSD-style
     4  # license that can be found in the LICENSE file.
     5  
     6  # The syscall package provides access to the raw system call
     7  # interface of the underlying operating system.  Porting Go to
     8  # a new architecture/operating system combination requires
     9  # some manual effort, though there are tools that automate
    10  # much of the process.  The auto-generated files have names
    11  # beginning with z.
    12  #
    13  # This script runs or (given -n) prints suggested commands to generate z files
    14  # for the current system.  Running those commands is not automatic.
    15  # This script is documentation more than anything else.
    16  #
    17  # * asm_${GOOS}_${GOARCH}.s
    18  #
    19  # This hand-written assembly file implements system call dispatch.
    20  # There are three entry points:
    21  #
    22  # 	func Syscall(trap, a1, a2, a3 uintptr) (r1, r2, err uintptr);
    23  # 	func Syscall6(trap, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2, err uintptr);
    24  # 	func RawSyscall(trap, a1, a2, a3 uintptr) (r1, r2, err uintptr);
    25  #
    26  # The first and second are the standard ones; they differ only in
    27  # how many arguments can be passed to the kernel.
    28  # The third is for low-level use by the ForkExec wrapper;
    29  # unlike the first two, it does not call into the scheduler to
    30  # let it know that a system call is running.
    31  #
    32  # * syscall_${GOOS}.go
    33  #
    34  # This hand-written Go file implements system calls that need
    35  # special handling and lists "//sys" comments giving prototypes
    36  # for ones that can be auto-generated.  Mksyscall reads those
    37  # comments to generate the stubs.
    38  #
    39  # * syscall_${GOOS}_${GOARCH}.go
    40  #
    41  # Same as syscall_${GOOS}.go except that it contains code specific
    42  # to ${GOOS} on one particular architecture.
    43  #
    44  # * types_${GOOS}.c
    45  #
    46  # This hand-written C file includes standard C headers and then
    47  # creates typedef or enum names beginning with a dollar sign
    48  # (use of $ in variable names is a gcc extension).  The hardest
    49  # part about preparing this file is figuring out which headers to
    50  # include and which symbols need to be #defined to get the
    51  # actual data structures that pass through to the kernel system calls.
    52  # Some C libraries present alternate versions for binary compatibility
    53  # and translate them on the way in and out of system calls, but
    54  # there is almost always a #define that can get the real ones.
    55  # See types_darwin.c and types_linux.c for examples.
    56  #
    57  # * zerror_${GOOS}_${GOARCH}.go
    58  #
    59  # This machine-generated file defines the system's error numbers,
    60  # error strings, and signal numbers.  The generator is "mkerrors.sh".
    61  # Usually no arguments are needed, but mkerrors.sh will pass its
    62  # arguments on to godefs.
    63  #
    64  # * zsyscall_${GOOS}_${GOARCH}.go
    65  #
    66  # Generated by mksyscall.pl; see syscall_${GOOS}.go above.
    67  #
    68  # * zsysnum_${GOOS}_${GOARCH}.go
    69  #
    70  # Generated by mksysnum_${GOOS}.
    71  #
    72  # * ztypes_${GOOS}_${GOARCH}.go
    73  #
    74  # Generated by godefs; see types_${GOOS}.c above.
    75  
    76  GOOSARCH="${GOOS}_${GOARCH}"
    77  
    78  # defaults
    79  mksyscall="./mksyscall.pl"
    80  mkerrors="./mkerrors.sh"
    81  zerrors="zerrors_$GOOSARCH.go"
    82  mksysctl=""
    83  zsysctl="zsysctl_$GOOSARCH.go"
    84  mksysnum=
    85  mktypes=
    86  mkasm=
    87  run="sh"
    88  
    89  case "$1" in
    90  -syscalls)
    91  	for i in zsyscall*go
    92  	do
    93  		# Run the command line that appears in the first line
    94  		# of the generated file to regenerate it.
    95  		sed 1q $i | sed 's;^// ;;' | sh > _$i && gofmt < _$i > $i
    96  		rm _$i
    97  	done
    98  	exit 0
    99  	;;
   100  -n)
   101  	run="cat"
   102  	shift
   103  esac
   104  
   105  case "$#" in
   106  0)
   107  	;;
   108  *)
   109  	echo 'usage: mkall.sh [-n]' 1>&2
   110  	exit 2
   111  esac
   112  
   113  GOOSARCH_in=syscall_$GOOSARCH.go
   114  case "$GOOSARCH" in
   115  _* | *_ | _)
   116  	echo 'undefined $GOOS_$GOARCH:' "$GOOSARCH" 1>&2
   117  	exit 1
   118  	;;
   119  aix_ppc64)
   120  	mkerrors="$mkerrors -maix64"
   121  	mksyscall="./mksyscall_libc.pl -aix"
   122  	mktypes="GOARCH=$GOARCH go tool cgo -godefs"
   123  	;;
   124  darwin_386)
   125  	mkerrors="$mkerrors -m32"
   126  	mksyscall="./mksyscall.pl -l32 -darwin"
   127  	mksysnum="./mksysnum_darwin.pl /usr/include/sys/syscall.h"
   128  	mktypes="GOARCH=$GOARCH go tool cgo -godefs"
   129  	mkasm="go run mkasm_darwin.go"
   130  	;;
   131  darwin_amd64)
   132  	mkerrors="$mkerrors -m64"
   133  	mksyscall="./mksyscall.pl -darwin"
   134  	mksysnum="./mksysnum_darwin.pl /usr/include/sys/syscall.h"
   135  	mktypes="GOARCH=$GOARCH go tool cgo -godefs"
   136  	mkasm="go run mkasm_darwin.go"
   137  	;;
   138  darwin_arm64)
   139  	mkerrors="$mkerrors -m64"
   140  	mksyscall="./mksyscall.pl -darwin"
   141  	mksysnum="./mksysnum_darwin.pl /usr/include/sys/syscall.h"
   142  	mktypes="GOARCH=$GOARCH go tool cgo -godefs"
   143  	mkasm="go run mkasm_darwin.go"
   144  	;;
   145  darwin_arm)
   146  	mkerrors="$mkerrors -m32"
   147  	mksyscall="./mksyscall.pl -l32 -darwin"
   148  	mksysnum="./mksysnum_darwin.pl /usr/include/sys/syscall.h"
   149  	mktypes="GOARCH=$GOARCH go tool cgo -godefs"
   150  	mkasm="go run mkasm_darwin.go"
   151  	;;
   152  dragonfly_amd64)
   153  	mkerrors="$mkerrors -m64"
   154  	mksyscall="./mksyscall.pl -dragonfly"
   155  	mksysnum="curl -s 'http://gitweb.dragonflybsd.org/dragonfly.git/blob_plain/HEAD:/sys/kern/syscalls.master' | ./mksysnum_dragonfly.pl"
   156  	mktypes="GOARCH=$GOARCH go tool cgo -godefs"
   157  	;;
   158  freebsd_386)
   159  	mkerrors="$mkerrors -m32"
   160  	mksyscall="./mksyscall.pl -l32"
   161  	mksysnum="curl -s 'http://svn.freebsd.org/base/stable/10/sys/kern/syscalls.master' | ./mksysnum_freebsd.pl"
   162  	mktypes="GOARCH=$GOARCH go tool cgo -godefs"
   163  	;;
   164  freebsd_amd64)
   165  	mkerrors="$mkerrors -m64"
   166  	mksysnum="curl -s 'http://svn.freebsd.org/base/stable/10/sys/kern/syscalls.master' | ./mksysnum_freebsd.pl"
   167  	mktypes="GOARCH=$GOARCH go tool cgo -godefs"
   168  	;;
   169  freebsd_arm)
   170  	mkerrors="$mkerrors"
   171  	mksyscall="./mksyscall.pl -l32 -arm"
   172  	mksysnum="curl -s 'http://svn.freebsd.org/base/stable/10/sys/kern/syscalls.master' | ./mksysnum_freebsd.pl"
   173  	# Let the type of C char be signed to make the bare syscall
   174  	# API consistent between platforms.
   175  	mktypes="GOARCH=$GOARCH go tool cgo -godefs -- -fsigned-char"
   176  	;;
   177  linux_386)
   178  	mkerrors="$mkerrors -m32"
   179  	mksyscall="./mksyscall.pl -l32"
   180  	mksysnum="./mksysnum_linux.pl /usr/include/asm/unistd_32.h"
   181  	mktypes="GOARCH=$GOARCH go tool cgo -godefs"
   182  	;;
   183  linux_amd64)
   184  	unistd_h=$(ls -1 /usr/include/asm/unistd_64.h /usr/include/x86_64-linux-gnu/asm/unistd_64.h 2>/dev/null | head -1)
   185  	if [ "$unistd_h" = "" ]; then
   186  		echo >&2 cannot find unistd_64.h
   187  		exit 1
   188  	fi
   189  	mkerrors="$mkerrors -m64"
   190  	mksysnum="./mksysnum_linux.pl $unistd_h"
   191  	mktypes="GOARCH=$GOARCH go tool cgo -godefs"
   192  	;;
   193  linux_arm)
   194  	mkerrors="$mkerrors"
   195  	mksyscall="./mksyscall.pl -l32 -arm"
   196  	mksysnum="curl -s 'http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/plain/arch/arm/include/uapi/asm/unistd.h' | ./mksysnum_linux.pl -"
   197  	mktypes="GOARCH=$GOARCH go tool cgo -godefs"
   198  	;;
   199  linux_arm64)
   200  	unistd_h=$(ls -1 /usr/include/asm/unistd.h /usr/include/asm-generic/unistd.h 2>/dev/null | head -1)
   201  	if [ "$unistd_h" = "" ]; then
   202  		echo >&2 cannot find unistd_64.h
   203  		exit 1
   204  	fi
   205  	mksysnum="./mksysnum_linux.pl $unistd_h"
   206  	# Let the type of C char be signed to make the bare syscall
   207  	# API consistent between platforms.
   208  	mktypes="GOARCH=$GOARCH go tool cgo -godefs -- -fsigned-char"
   209  	;;
   210  linux_mips)
   211  	GOOSARCH_in=syscall_linux_mipsx.go
   212  	unistd_h=/usr/include/asm/unistd.h
   213  	mksyscall="./mksyscall.pl -b32 -arm"
   214  	mkerrors="$mkerrors"
   215  	mksysnum="./mksysnum_linux.pl $unistd_h"
   216  	mktypes="GOARCH=$GOARCH go tool cgo -godefs"
   217  	;;
   218  linux_mipsle)
   219  	GOOSARCH_in=syscall_linux_mipsx.go
   220  	unistd_h=/usr/include/asm/unistd.h
   221  	mksyscall="./mksyscall.pl -l32 -arm"
   222  	mkerrors="$mkerrors"
   223  	mksysnum="./mksysnum_linux.pl $unistd_h"
   224  	mktypes="GOARCH=$GOARCH go tool cgo -godefs"
   225  	;;
   226  linux_mips64)
   227  	GOOSARCH_in=syscall_linux_mips64x.go
   228  	unistd_h=/usr/include/asm/unistd.h
   229  	mkerrors="$mkerrors -m64"
   230  	mksysnum="./mksysnum_linux.pl $unistd_h"
   231  	mktypes="GOARCH=$GOARCH go tool cgo -godefs"
   232  	;;
   233  linux_mips64le)
   234  	GOOSARCH_in=syscall_linux_mips64x.go
   235  	unistd_h=/usr/include/asm/unistd.h
   236  	mkerrors="$mkerrors -m64"
   237  	mksysnum="./mksysnum_linux.pl $unistd_h"
   238  	mktypes="GOARCH=$GOARCH go tool cgo -godefs"
   239  	;;
   240  linux_ppc64)
   241  	GOOSARCH_in=syscall_linux_ppc64x.go
   242  	unistd_h=/usr/include/asm/unistd.h
   243  	mkerrors="$mkerrors -m64"
   244  	mksysnum="./mksysnum_linux.pl $unistd_h"
   245  	mktypes="GOARCH=$GOARCH go tool cgo -godefs"
   246  	;;
   247  linux_ppc64le)
   248  	GOOSARCH_in=syscall_linux_ppc64x.go
   249  	unistd_h=/usr/include/powerpc64le-linux-gnu/asm/unistd.h
   250  	mkerrors="$mkerrors -m64"
   251  	mksysnum="./mksysnum_linux.pl $unistd_h"
   252  	mktypes="GOARCH=$GOARCH go tool cgo -godefs"
   253  	;;
   254  linux_s390x)
   255  	GOOSARCH_in=syscall_linux_s390x.go
   256  	unistd_h=/usr/include/asm/unistd.h
   257  	mkerrors="$mkerrors -m64"
   258  	mksysnum="./mksysnum_linux.pl $unistd_h"
   259  	mktypes="GOARCH=$GOARCH go tool cgo -godefs"
   260  	;;
   261  nacl_386)
   262  	mkerrors=""
   263  	mksyscall="./mksyscall.pl -l32 -nacl"
   264  	mksysnum=""
   265  	mktypes=""
   266  	;;
   267  nacl_amd64p32)
   268  	mkerrors=""
   269  	mksyscall="./mksyscall.pl -nacl"
   270  	mksysnum=""
   271  	mktypes=""
   272  	;;
   273  netbsd_386)
   274  	mkerrors="$mkerrors -m32"
   275  	mksyscall="./mksyscall.pl -l32 -netbsd"
   276  	mksysnum="curl -s 'http://cvsweb.netbsd.org/bsdweb.cgi/~checkout~/src/sys/kern/syscalls.master' | ./mksysnum_netbsd.pl"
   277  	mktypes="GOARCH=$GOARCH go tool cgo -godefs"
   278  	;;
   279  netbsd_amd64)
   280  	mkerrors="$mkerrors -m64"
   281  	mksyscall="./mksyscall.pl -netbsd"
   282  	mksysnum="curl -s 'http://cvsweb.netbsd.org/bsdweb.cgi/~checkout~/src/sys/kern/syscalls.master' | ./mksysnum_netbsd.pl"
   283  	mktypes="GOARCH=$GOARCH go tool cgo -godefs"
   284  	;;
   285  netbsd_arm)
   286  	mkerrors="$mkerrors -m32"
   287  	mksyscall="./mksyscall.pl -l32 -netbsd -arm"
   288  	mksysnum="curl -s 'http://cvsweb.netbsd.org/bsdweb.cgi/~checkout~/src/sys/kern/syscalls.master' | ./mksysnum_netbsd.pl"
   289  	mktypes="GOARCH=$GOARCH go tool cgo -godefs"
   290  	;;
   291  openbsd_386)
   292  	mkerrors="$mkerrors -m32"
   293  	mksyscall="./mksyscall.pl -l32 -openbsd"
   294  	mksysctl="./mksysctl_openbsd.pl"
   295  	zsysctl="zsysctl_openbsd.go"
   296  	mksysnum="curl -s 'http://cvsweb.openbsd.org/cgi-bin/cvsweb/~checkout~/src/sys/kern/syscalls.master' | ./mksysnum_openbsd.pl"
   297  	mktypes="GOARCH=$GOARCH go tool cgo -godefs"
   298  	;;
   299  openbsd_amd64)
   300  	mkerrors="$mkerrors -m64"
   301  	mksyscall="./mksyscall.pl -openbsd"
   302  	mksysctl="./mksysctl_openbsd.pl"
   303  	zsysctl="zsysctl_openbsd.go"
   304  	mksysnum="curl -s 'http://cvsweb.openbsd.org/cgi-bin/cvsweb/~checkout~/src/sys/kern/syscalls.master' | ./mksysnum_openbsd.pl"
   305  	mktypes="GOARCH=$GOARCH go tool cgo -godefs"
   306  	;;
   307  openbsd_arm)
   308  	mkerrors="$mkerrors"
   309  	mksyscall="./mksyscall.pl -l32 -openbsd -arm"
   310  	mksysctl="./mksysctl_openbsd.pl"
   311  	zsysctl="zsysctl_openbsd.go"
   312  	mksysnum="curl -s 'http://cvsweb.openbsd.org/cgi-bin/cvsweb/~checkout~/src/sys/kern/syscalls.master' | ./mksysnum_openbsd.pl"
   313  	# Let the type of C char be signed to make the bare syscall
   314  	# API consistent between platforms.
   315  	mktypes="GOARCH=$GOARCH go tool cgo -godefs -- -fsigned-char"
   316  	;;
   317  plan9_386)
   318  	mkerrors=
   319  	mksyscall="./mksyscall.pl -l32 -plan9"
   320  	mksysnum="./mksysnum_plan9.sh /n/sources/plan9/sys/src/libc/9syscall/sys.h"
   321  	mktypes="XXX"
   322  	;;
   323  solaris_amd64)
   324  	mksyscall="./mksyscall_libc.pl -solaris"
   325  	mkerrors="$mkerrors -m64"
   326  	mksysnum=
   327  	mktypes="GOARCH=$GOARCH go tool cgo -godefs"
   328  	;;
   329  windows_*)
   330  	echo 'run "go generate" instead' 1>&2
   331  	exit 1
   332  	;;
   333  *)
   334  	echo 'unrecognized $GOOS_$GOARCH: ' "$GOOSARCH" 1>&2
   335  	exit 1
   336  	;;
   337  esac
   338  
   339  (
   340  	if [ -n "$mkerrors" ]; then echo "$mkerrors |gofmt >$zerrors"; fi
   341  	syscall_goos="syscall_$GOOS.go"
   342   	case "$GOOS" in
   343  	darwin | dragonfly | freebsd | netbsd | openbsd)
   344  		syscall_goos="syscall_bsd.go $syscall_goos"
   345   		;;
   346   	esac
   347  	if [ -n "$mksyscall" ]; then echo "$mksyscall -tags $GOOS,$GOARCH $syscall_goos $GOOSARCH_in |gofmt >zsyscall_$GOOSARCH.go"; fi
   348  	if [ -n "$mksysctl" ]; then echo "$mksysctl |gofmt >$zsysctl"; fi
   349  	if [ -n "$mksysnum" ]; then echo "$mksysnum |gofmt >zsysnum_$GOOSARCH.go"; fi
   350  	if [ -n "$mktypes" ]; then
   351  		# ztypes_$GOOSARCH.go could be erased before "go run mkpost.go" is called.
   352  		# Therefore, "go run" tries to recompile syscall package but ztypes is empty and it fails.
   353  		echo "$mktypes types_$GOOS.go |go run mkpost.go >ztypes_$GOOSARCH.go.NEW && mv ztypes_$GOOSARCH.go.NEW ztypes_$GOOSARCH.go";
   354  	fi
   355  	if [ -n "$mkasm" ]; then echo "$mkasm $GOARCH"; fi
   356  ) | $run