libgo: change build procedure to use build tags

Previously the libgo Makefile explicitly listed the set of files to
    compile for each package.  For packages that use build tags, this
    required a lot of awkward automake conditionals in the Makefile.
    
    This CL changes the build to look at the build tags in the files.
    The new shell script libgo/match.sh does the matching.  This required
    adjusting a lot of build tags, and removing some files that are never
    used.  I verified that the exact same sets of files are compiled on
    amd64 GNU/Linux.  I also tested the build on i386 Solaris.
    
    Writing match.sh revealed some bugs in the build tag handling that
    already exists, in a slightly different form, in the gotest shell
    script.  This CL fixes those problems as well.
    
    The old code used automake conditionals to handle systems that were
    missing strerror_r and wait4.  Rather than deal with those in Go, those
    functions are now implemented in runtime/go-nosys.c when necessary, so
    the Go code can simply assume that they exist.
    
    The os testsuite looked for dir_unix.go, which was never built for gccgo
    and has now been removed.  I changed the testsuite to look for dir.go
    instead.
    
    Reviewed-on: https://go-review.googlesource.com/25546

From-SVN: r239189

gcc/go/gofrontend/MERGE

@@ -1,4 +1,4 @@
-ae44ca35b0b1c2ab925cadbcd7d47b334be5a318
+8473b709ebd46c03c0e36e140656bd8c5d32d883
 
 The first line of this file holds the git revision number of the last
 merge done from the gofrontend repository.

libgo/go/crypto/aes/aes_gcm.go

@@ -2,7 +2,8 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// +build amd64
+// +build ignore
+// -build amd64
 
 package aes
 

libgo/go/crypto/aes/cipher_amd64.go

@@ -2,6 +2,8 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+// +build ignore
+
 package aes
 
 import (

libgo/go/crypto/aes/cipher_generic.go

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// +build !amd64,!s390x
+// -build !amd64,!s390x
 
 package aes
 

libgo/go/crypto/aes/cipher_s390x.go

@@ -2,6 +2,8 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+// +build ignore
+
 package aes
 
 import (

libgo/go/crypto/elliptic/p256.go

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// +build !amd64
+// -build !amd64
 
 package elliptic
 

libgo/go/crypto/elliptic/p256_amd64.go

@@ -10,6 +10,7 @@
 // http://link.springer.com/article/10.1007%2Fs13389-014-0090-x
 // https://eprint.iacr.org/2013/816.pdf
 
+// +build ignore
 // +build amd64
 
 package elliptic

libgo/go/crypto/md5/md5block_decl.go

@@ -2,7 +2,8 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// +build amd64 amd64p32 386 arm ppc64le s390x
+// +build ignore
+// -build amd64 amd64p32 386 arm ppc64le s390x
 
 package md5
 

libgo/go/crypto/md5/md5block_generic.go

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// +build !amd64,!amd64p32,!386,!arm,!ppc64le,!s390x
+// -build !amd64,!amd64p32,!386,!arm,!ppc64le,!s390x
 
 package md5
 

libgo/go/crypto/rc4/rc4_asm.go

@@ -2,6 +2,8 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+// +build ignore
+
 // +build amd64 amd64p32 arm,!nacl 386
 
 package rc4

libgo/go/crypto/rc4/rc4_ref.go

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// +build !amd64,!amd64p32,!arm,!386 arm,nacl
+// -build !amd64,!amd64p32,!arm,!386 arm,nacl
 
 package rc4
 

libgo/go/crypto/sha1/fallback_test.go

@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+// +build ignore
 // +build s390x
 
 package sha1

libgo/go/crypto/sha1/sha1block_amd64.go

@@ -2,6 +2,8 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+// +build ignore
+
 package sha1
 
 //go:noescape

libgo/go/crypto/sha1/sha1block_decl.go

@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+// +build ignore
 // +build amd64p32 arm 386 s390x
 
 package sha1

libgo/go/crypto/sha1/sha1block_generic.go

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// +build !amd64,!amd64p32,!386,!arm,!s390x
+// -build !amd64,!amd64p32,!386,!arm,!s390x
 
 package sha1
 

libgo/go/crypto/sha1/sha1block_s390x.go

@@ -2,6 +2,8 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+// +build ignore
+
 package sha1
 
 // featureCheck reports whether the CPU supports the

libgo/go/crypto/sha256/sha256block_decl.go

@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+// +build ignore
 // +build 386 amd64 s390x
 
 package sha256

libgo/go/crypto/sha256/sha256block_generic.go

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// +build !amd64,!386,!s390x
+// -build !amd64,!386,!s390x
 
 package sha256
 

libgo/go/crypto/sha256/sha256block_s390x.go

@@ -2,6 +2,8 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+// +build ignore
+
 package sha256
 
 // featureCheck reports whether the CPU supports the

libgo/go/crypto/sha512/fallback_test.go

@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+// +build ignore
 // +build s390x
 
 package sha512

libgo/go/crypto/sha512/sha512block_decl.go

@@ -2,7 +2,8 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// +build amd64 s390x
+// +build ignore
+// -build amd64 s390x
 
 package sha512
 

libgo/go/crypto/sha512/sha512block_generic.go

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// +build !amd64,!s390x
+// -build !amd64,!s390x
 
 package sha512
 

libgo/go/crypto/sha512/sha512block_s390x.go

@@ -2,6 +2,8 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+// +build ignore
+
 package sha512
 
 // featureCheck reports whether the CPU supports the

libgo/go/hash/crc32/crc32_amd64.go

@@ -2,6 +2,8 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+// +build ignore
+
 package crc32
 
 // This file contains the code to call the SSE 4.2 version of the Castagnoli

libgo/go/hash/crc32/crc32_generic.go

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// +build !amd64,!amd64p32,!s390x
+// -build !amd64,!amd64p32,!s390x
 
 package crc32
 

libgo/go/log/syslog/syslog_libc.go

@@ -2,6 +2,8 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+// +build solaris irix
+
 // gccgo specific implementation of syslog for Solaris.  Solaris uses
 // STREAMS to communicate with syslogd.  That is enough of a pain that
 // we just call the libc function.

libgo/go/log/syslog/syslog_unix.go

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// +build !windows,!nacl,!plan9
+// +build !windows,!nacl,!plan9,!solaris,!irix
 
 package syslog
 

libgo/go/math/big/arith_decl.go

@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+// +build ignore
 // +build !math_big_pure_go
 
 package big

libgo/go/math/big/arith_decl_pure.go

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// +build math_big_pure_go
+// -build math_big_pure_go
 
 package big
 

libgo/go/math/floor_asm.go

@@ -2,7 +2,8 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// +build amd64 amd64p32
+// +build ignore
+// -build amd64 amd64p32
 
 package math
 

libgo/go/net/fd_select.go

@@ -1,182 +0,0 @@
-// Copyright 2010 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.
-
-// Waiting for FDs via select(2).
-
-package net
-
-import (
-	"errors"
-	"os"
-	"syscall"
-)
-
-type pollster struct {
-	readFds, writeFds, repeatFds *syscall.FdSet
-	maxFd                        int
-	readyReadFds, readyWriteFds  *syscall.FdSet
-	nReady                       int
-	lastFd                       int
-	closed                       bool
-}
-
-func newpollster() (p *pollster, err error) {
-	p = new(pollster)
-	p.readFds = new(syscall.FdSet)
-	p.writeFds = new(syscall.FdSet)
-	p.repeatFds = new(syscall.FdSet)
-	p.readyReadFds = new(syscall.FdSet)
-	p.readyWriteFds = new(syscall.FdSet)
-	p.maxFd = -1
-	p.nReady = 0
-	p.lastFd = 0
-	return p, nil
-}
-
-func (p *pollster) AddFD(fd int, mode int, repeat bool) (bool, error) {
-	// pollServer is locked.
-
-	if p.closed {
-		return false, errors.New("pollster closed")
-	}
-
-	if mode == 'r' {
-		syscall.FDSet(fd, p.readFds)
-	} else {
-		syscall.FDSet(fd, p.writeFds)
-	}
-
-	if repeat {
-		syscall.FDSet(fd, p.repeatFds)
-	}
-
-	if fd > p.maxFd {
-		p.maxFd = fd
-	}
-
-	return true, nil
-}
-
-func (p *pollster) DelFD(fd int, mode int) bool {
-	// pollServer is locked.
-
-	if p.closed {
-		return false
-	}
-
-	if mode == 'r' {
-		if !syscall.FDIsSet(fd, p.readFds) {
-			print("Select unexpected fd=", fd, " for read\n")
-			return false
-		}
-		syscall.FDClr(fd, p.readFds)
-	} else {
-		if !syscall.FDIsSet(fd, p.writeFds) {
-			print("Select unexpected fd=", fd, " for write\n")
-			return false
-		}
-		syscall.FDClr(fd, p.writeFds)
-	}
-
-	// Doesn't matter if not already present.
-	syscall.FDClr(fd, p.repeatFds)
-
-	// We don't worry about maxFd here.
-
-	return true
-}
-
-func (p *pollster) WaitFD(s *pollServer, nsec int64) (fd int, mode int, err error) {
-	if p.nReady == 0 {
-		var timeout *syscall.Timeval
-		var tv syscall.Timeval
-		timeout = nil
-		if nsec > 0 {
-			tv = syscall.NsecToTimeval(nsec)
-			timeout = &tv
-		}
-
-		var n int
-		var e error
-		var tmpReadFds, tmpWriteFds syscall.FdSet
-		for {
-			if p.closed {
-				return -1, 0, errors.New("pollster closed")
-			}
-
-			// Temporary syscall.FdSet's into which the values are copied
-			// because select mutates the values.
-			tmpReadFds = *p.readFds
-			tmpWriteFds = *p.writeFds
-
-			s.Unlock()
-			n, e = syscall.Select(p.maxFd+1, &tmpReadFds, &tmpWriteFds, nil, timeout)
-			s.Lock()
-
-			if e != syscall.EINTR {
-				break
-			}
-		}
-		if e == syscall.EBADF {
-			// Some file descriptor has been closed.
-			tmpReadFds = syscall.FdSet{}
-			tmpWriteFds = syscall.FdSet{}
-			n = 0
-			for i := 0; i < p.maxFd+1; i++ {
-				if syscall.FDIsSet(i, p.readFds) {
-					var s syscall.Stat_t
-					if syscall.Fstat(i, &s) == syscall.EBADF {
-						syscall.FDSet(i, &tmpReadFds)
-						n++
-					}
-				} else if syscall.FDIsSet(i, p.writeFds) {
-					var s syscall.Stat_t
-					if syscall.Fstat(i, &s) == syscall.EBADF {
-						syscall.FDSet(i, &tmpWriteFds)
-						n++
-					}
-				}
-			}
-		} else if e != nil {
-			return -1, 0, os.NewSyscallError("select", e)
-		}
-		if n == 0 {
-			return -1, 0, nil
-		}
-
-		p.nReady = n
-		*p.readyReadFds = tmpReadFds
-		*p.readyWriteFds = tmpWriteFds
-		p.lastFd = 0
-	}
-
-	flag := false
-	for i := p.lastFd; i < p.maxFd+1; i++ {
-		if syscall.FDIsSet(i, p.readyReadFds) {
-			flag = true
-			mode = 'r'
-			syscall.FDClr(i, p.readyReadFds)
-		} else if syscall.FDIsSet(i, p.readyWriteFds) {
-			flag = true
-			mode = 'w'
-			syscall.FDClr(i, p.readyWriteFds)
-		}
-		if flag {
-			if !syscall.FDIsSet(i, p.repeatFds) {
-				p.DelFD(i, mode)
-			}
-			p.nReady--
-			p.lastFd = i
-			return i, mode, nil
-		}
-	}
-
-	// Will not reach here.  Just to shut up the compiler.
-	return -1, 0, nil
-}
-
-func (p *pollster) Close() error {
-	p.closed = true
-	return nil
-}

libgo/go/net/newpollserver_rtems.go

@@ -2,6 +2,8 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+// +build rtems
+
 package net
 
 import (

libgo/go/os/dir_largefile.go

@@ -5,6 +5,8 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+// +build linux solaris,386 solaris,sparc
+
 package os
 
 import "syscall"

libgo/go/os/dir_regfile.go

@@ -5,6 +5,10 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+// +build !linux
+// +build !solaris,386
+// +build !solaris,sparc
+
 package os
 
 import "syscall"

libgo/go/os/dir_unix.go

@@ -1,58 +0,0 @@
-// 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.
-
-// +build darwin dragonfly freebsd linux nacl netbsd openbsd solaris
-
-package os
-
-import (
-	"io"
-	"syscall"
-)
-
-const (
-	blockSize = 4096
-)
-
-func (f *File) readdirnames(n int) (names []string, err error) {
-	// If this file has no dirinfo, create one.
-	if f.dirinfo == nil {
-		f.dirinfo = new(dirInfo)
-		// The buffer must be at least a block long.
-		f.dirinfo.buf = make([]byte, blockSize)
-	}
-	d := f.dirinfo
-
-	size := n
-	if size <= 0 {
-		size = 100
-		n = -1
-	}
-
-	names = make([]string, 0, size) // Empty with room to grow.
-	for n != 0 {
-		// Refill the buffer if necessary
-		if d.bufp >= d.nbuf {
-			d.bufp = 0
-			var errno error
-			d.nbuf, errno = fixCount(syscall.ReadDirent(f.fd, d.buf))
-			if errno != nil {
-				return names, NewSyscallError("readdirent", errno)
-			}
-			if d.nbuf <= 0 {
-				break // EOF
-			}
-		}
-
-		// Drain the buffer
-		var nb, nc int
-		nb, nc, names = syscall.ParseDirent(d.buf[d.bufp:d.nbuf], n, names)
-		d.bufp += nb
-		n -= nc
-	}
-	if n >= 0 && len(names) == 0 {
-		return names, io.EOF
-	}
-	return names, nil
-}

libgo/go/os/os_test.go

@@ -28,7 +28,7 @@ import (
 var supportsSymlinks = true
 
 var dot = []string{
-	"dir_unix.go",
+	"dir.go",
 	"env.go",
 	"error.go",
 	"file.go",

libgo/go/os/stat.go

@@ -2,6 +2,13 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+// +build !darwin
+// +build !freebsd
+// +build !linux
+// +build !netbsd
+// +build !openbsd
+// +build !solaris
+
 package os
 
 import (

libgo/go/os/stat_atim.go

@@ -2,6 +2,8 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+// +build linux openbsd solaristag
+
 package os
 
 import (

libgo/go/os/stat_atimespec.go

@@ -2,6 +2,8 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+// +build darwin freebsd netbsd
+
 package os
 
 import (

libgo/go/os/stat_solaris.go

@@ -2,6 +2,8 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+// +build !solaristag
+
 package os
 
 import (

libgo/go/os/sys_uname.go

@@ -4,6 +4,8 @@
 
 // For systems which only store the hostname in uname (Solaris).
 
+// +build solaris irix rtems
+
 package os
 
 import "syscall"

libgo/go/runtime/cgo_mips64x.go

@@ -1,12 +0,0 @@
-// Copyright 2016 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.
-
-// +build mips64 mips64le
-
-package runtime
-
-// crosscall1 calls into the runtime to set up the registers the
-// Go runtime expects and so the symbol it calls needs to be exported
-// for external linking to work.
-//go:cgo_export_static _cgo_reginit

libgo/go/runtime/cgo_mmap.go

@@ -2,6 +2,8 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+// +build ignore
+
 // Support for memory sanitizer. See runtime/cgo/mmap.go.
 
 // +build linux,amd64

libgo/go/runtime/cgo_ppc64x.go

@@ -1,12 +0,0 @@
-// Copyright 2015 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.
-
-// +build ppc64 ppc64le
-
-package runtime
-
-// crosscall_ppc64 calls into the runtime to set up the registers the
-// Go runtime expects and so the symbol it calls needs to be exported
-// for external linking to work.
-//go:cgo_export_static _cgo_reginit

libgo/go/runtime/cgocheck.go

@@ -2,6 +2,8 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+// +build ignore
+
 // Code to check that pointer writes follow the cgo rules.
 // These functions are invoked via the write barrier when debug.cgocheck > 1.
 

libgo/go/runtime/defs_linux_mips64x.go

@@ -1,183 +0,0 @@
-// +build mips64 mips64le
-// +build linux
-
-package runtime
-
-const (
-	_EINTR  = 0x4
-	_EAGAIN = 0xb
-	_ENOMEM = 0xc
-
-	_PROT_NONE  = 0x0
-	_PROT_READ  = 0x1
-	_PROT_WRITE = 0x2
-	_PROT_EXEC  = 0x4
-
-	_MAP_ANON    = 0x800
-	_MAP_PRIVATE = 0x2
-	_MAP_FIXED   = 0x10
-
-	_MADV_DONTNEED   = 0x4
-	_MADV_HUGEPAGE   = 0xe
-	_MADV_NOHUGEPAGE = 0xf
-
-	_SA_RESTART = 0x10000000
-	_SA_ONSTACK = 0x8000000
-	_SA_SIGINFO = 0x8
-
-	_SIGHUP    = 0x1
-	_SIGINT    = 0x2
-	_SIGQUIT   = 0x3
-	_SIGILL    = 0x4
-	_SIGTRAP   = 0x5
-	_SIGABRT   = 0x6
-	_SIGEMT    = 0x7
-	_SIGFPE    = 0x8
-	_SIGKILL   = 0x9
-	_SIGBUS    = 0xa
-	_SIGSEGV   = 0xb
-	_SIGSYS    = 0xc
-	_SIGPIPE   = 0xd
-	_SIGALRM   = 0xe
-	_SIGUSR1   = 0x10
-	_SIGUSR2   = 0x11
-	_SIGCHLD   = 0x12
-	_SIGPWR    = 0x13
-	_SIGWINCH  = 0x14
-	_SIGURG    = 0x15
-	_SIGIO     = 0x16
-	_SIGSTOP   = 0x17
-	_SIGTSTP   = 0x18
-	_SIGCONT   = 0x19
-	_SIGTTIN   = 0x1a
-	_SIGTTOU   = 0x1b
-	_SIGVTALRM = 0x1c
-	_SIGPROF   = 0x1d
-	_SIGXCPU   = 0x1e
-	_SIGXFSZ   = 0x1f
-
-	_FPE_INTDIV = 0x1
-	_FPE_INTOVF = 0x2
-	_FPE_FLTDIV = 0x3
-	_FPE_FLTOVF = 0x4
-	_FPE_FLTUND = 0x5
-	_FPE_FLTRES = 0x6
-	_FPE_FLTINV = 0x7
-	_FPE_FLTSUB = 0x8
-
-	_BUS_ADRALN = 0x1
-	_BUS_ADRERR = 0x2
-	_BUS_OBJERR = 0x3
-
-	_SEGV_MAPERR = 0x1
-	_SEGV_ACCERR = 0x2
-
-	_ITIMER_REAL    = 0x0
-	_ITIMER_VIRTUAL = 0x1
-	_ITIMER_PROF    = 0x2
-
-	_EPOLLIN       = 0x1
-	_EPOLLOUT      = 0x4
-	_EPOLLERR      = 0x8
-	_EPOLLHUP      = 0x10
-	_EPOLLRDHUP    = 0x2000
-	_EPOLLET       = 0x80000000
-	_EPOLL_CLOEXEC = 0x80000
-	_EPOLL_CTL_ADD = 0x1
-	_EPOLL_CTL_DEL = 0x2
-	_EPOLL_CTL_MOD = 0x3
-)
-
-//struct Sigset {
-//	uint64	sig[1];
-//};
-//typedef uint64 Sigset;
-
-type timespec struct {
-	tv_sec  int64
-	tv_nsec int64
-}
-
-func (ts *timespec) set_sec(x int64) {
-	ts.tv_sec = x
-}
-
-func (ts *timespec) set_nsec(x int32) {
-	ts.tv_nsec = int64(x)
-}
-
-type timeval struct {
-	tv_sec  int64
-	tv_usec int64
-}
-
-func (tv *timeval) set_usec(x int32) {
-	tv.tv_usec = int64(x)
-}
-
-type sigactiont struct {
-	sa_flags   uint32
-	sa_handler uintptr
-	sa_mask    [2]uint64
-	// linux header does not have sa_restorer field,
-	// but it is used in setsig(). it is no harm to put it here
-	sa_restorer uintptr
-}
-
-type siginfo struct {
-	si_signo int32
-	si_code  int32
-	si_errno int32
-	__pad0   [1]int32
-	// below here is a union; si_addr is the only field we use
-	si_addr uint64
-}
-
-type itimerval struct {
-	it_interval timeval
-	it_value    timeval
-}
-
-type epollevent struct {
-	events    uint32
-	pad_cgo_0 [4]byte
-	data      [8]byte // unaligned uintptr
-}
-
-const (
-	_O_RDONLY    = 0x0
-	_O_CLOEXEC   = 0x80000
-	_SA_RESTORER = 0
-)
-
-type sigaltstackt struct {
-	ss_sp    *byte
-	ss_size  uintptr
-	ss_flags int32
-}
-
-type sigcontext struct {
-	sc_regs      [32]uint64
-	sc_fpregs    [32]uint64
-	sc_mdhi      uint64
-	sc_hi1       uint64
-	sc_hi2       uint64
-	sc_hi3       uint64
-	sc_mdlo      uint64
-	sc_lo1       uint64
-	sc_lo2       uint64
-	sc_lo3       uint64
-	sc_pc        uint64
-	sc_fpc_csr   uint32
-	sc_used_math uint32
-	sc_dsp       uint32
-	sc_reserved  uint32
-}
-
-type ucontext struct {
-	uc_flags    uint64
-	uc_link     *ucontext
-	uc_stack    sigaltstackt
-	uc_mcontext sigcontext
-	uc_sigmask  uint64
-}

libgo/go/runtime/defs_linux_s390x.go

@@ -1,167 +0,0 @@
-// Copyright 2016 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.
-
-package runtime
-
-const (
-	_EINTR  = 0x4
-	_EAGAIN = 0xb
-	_ENOMEM = 0xc
-
-	_PROT_NONE  = 0x0
-	_PROT_READ  = 0x1
-	_PROT_WRITE = 0x2
-	_PROT_EXEC  = 0x4
-
-	_MAP_ANON    = 0x20
-	_MAP_PRIVATE = 0x2
-	_MAP_FIXED   = 0x10
-
-	_MADV_DONTNEED   = 0x4
-	_MADV_HUGEPAGE   = 0xe
-	_MADV_NOHUGEPAGE = 0xf
-
-	_SA_RESTART = 0x10000000
-	_SA_ONSTACK = 0x8000000
-	_SA_SIGINFO = 0x4
-
-	_SIGHUP    = 0x1
-	_SIGINT    = 0x2
-	_SIGQUIT   = 0x3
-	_SIGILL    = 0x4
-	_SIGTRAP   = 0x5
-	_SIGABRT   = 0x6
-	_SIGBUS    = 0x7
-	_SIGFPE    = 0x8
-	_SIGKILL   = 0x9
-	_SIGUSR1   = 0xa
-	_SIGSEGV   = 0xb
-	_SIGUSR2   = 0xc
-	_SIGPIPE   = 0xd
-	_SIGALRM   = 0xe
-	_SIGSTKFLT = 0x10
-	_SIGCHLD   = 0x11
-	_SIGCONT   = 0x12
-	_SIGSTOP   = 0x13
-	_SIGTSTP   = 0x14
-	_SIGTTIN   = 0x15
-	_SIGTTOU   = 0x16
-	_SIGURG    = 0x17
-	_SIGXCPU   = 0x18
-	_SIGXFSZ   = 0x19
-	_SIGVTALRM = 0x1a
-	_SIGPROF   = 0x1b
-	_SIGWINCH  = 0x1c
-	_SIGIO     = 0x1d
-	_SIGPWR    = 0x1e
-	_SIGSYS    = 0x1f
-
-	_FPE_INTDIV = 0x1
-	_FPE_INTOVF = 0x2
-	_FPE_FLTDIV = 0x3
-	_FPE_FLTOVF = 0x4
-	_FPE_FLTUND = 0x5
-	_FPE_FLTRES = 0x6
-	_FPE_FLTINV = 0x7
-	_FPE_FLTSUB = 0x8
-
-	_BUS_ADRALN = 0x1
-	_BUS_ADRERR = 0x2
-	_BUS_OBJERR = 0x3
-
-	_SEGV_MAPERR = 0x1
-	_SEGV_ACCERR = 0x2
-
-	_ITIMER_REAL    = 0x0
-	_ITIMER_VIRTUAL = 0x1
-	_ITIMER_PROF    = 0x2
-
-	_EPOLLIN       = 0x1
-	_EPOLLOUT      = 0x4
-	_EPOLLERR      = 0x8
-	_EPOLLHUP      = 0x10
-	_EPOLLRDHUP    = 0x2000
-	_EPOLLET       = 0x80000000
-	_EPOLL_CLOEXEC = 0x80000
-	_EPOLL_CTL_ADD = 0x1
-	_EPOLL_CTL_DEL = 0x2
-	_EPOLL_CTL_MOD = 0x3
-)
-
-type timespec struct {
-	tv_sec  int64
-	tv_nsec int64
-}
-
-func (ts *timespec) set_sec(x int64) {
-	ts.tv_sec = x
-}
-
-func (ts *timespec) set_nsec(x int32) {
-	ts.tv_nsec = int64(x)
-}
-
-type timeval struct {
-	tv_sec  int64
-	tv_usec int64
-}
-
-func (tv *timeval) set_usec(x int32) {
-	tv.tv_usec = int64(x)
-}
-
-type sigactiont struct {
-	sa_handler  uintptr
-	sa_flags    uint64
-	sa_restorer uintptr
-	sa_mask     uint64
-}
-
-type siginfo struct {
-	si_signo int32
-	si_errno int32
-	si_code  int32
-	// below here is a union; si_addr is the only field we use
-	si_addr uint64
-}
-
-type itimerval struct {
-	it_interval timeval
-	it_value    timeval
-}
-
-type epollevent struct {
-	events    uint32
-	pad_cgo_0 [4]byte
-	data      [8]byte // unaligned uintptr
-}
-
-const (
-	_O_RDONLY    = 0x0
-	_O_CLOEXEC   = 0x80000
-	_SA_RESTORER = 0
-)
-
-type sigaltstackt struct {
-	ss_sp    *byte
-	ss_flags int32
-	ss_size  uintptr
-}
-
-type sigcontext struct {
-	psw_mask uint64
-	psw_addr uint64
-	gregs    [16]uint64
-	aregs    [16]uint32
-	fpc      uint32
-	fpregs   [16]uint64
-}
-
-type ucontext struct {
-	uc_flags    uint64
-	uc_link     *ucontext
-	uc_stack    sigaltstackt
-	uc_mcontext sigcontext
-	uc_sigmask  uint64
-}

libgo/go/runtime/defs_plan9_arm.go

@@ -1,63 +0,0 @@
-// Copyright 2015 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.
-
-package runtime
-
-const _PAGESIZE = 0x1000
-
-type ureg struct {
-	r0   uint32 /* general registers */
-	r1   uint32 /* ... */
-	r2   uint32 /* ... */
-	r3   uint32 /* ... */
-	r4   uint32 /* ... */
-	r5   uint32 /* ... */
-	r6   uint32 /* ... */
-	r7   uint32 /* ... */
-	r8   uint32 /* ... */
-	r9   uint32 /* ... */
-	r10  uint32 /* ... */
-	r11  uint32 /* ... */
-	r12  uint32 /* ... */
-	sp   uint32
-	link uint32 /* ... */
-	trap uint32 /* trap type */
-	psr  uint32
-	pc   uint32 /* interrupted addr */
-}
-
-type sigctxt struct {
-	u *ureg
-}
-
-func (c *sigctxt) pc() uintptr { return uintptr(c.u.pc) }
-func (c *sigctxt) sp() uintptr { return uintptr(c.u.sp) }
-func (c *sigctxt) lr() uintptr { return uintptr(c.u.link) }
-
-func (c *sigctxt) setpc(x uintptr)  { c.u.pc = uint32(x) }
-func (c *sigctxt) setsp(x uintptr)  { c.u.sp = uint32(x) }
-func (c *sigctxt) setlr(x uintptr)  { c.u.link = uint32(x) }
-func (c *sigctxt) savelr(x uintptr) { c.u.r0 = uint32(x) }
-
-func dumpregs(u *ureg) {
-	print("r0    ", hex(u.r0), "\n")
-	print("r1    ", hex(u.r1), "\n")
-	print("r2    ", hex(u.r2), "\n")
-	print("r3    ", hex(u.r3), "\n")
-	print("r4    ", hex(u.r4), "\n")
-	print("r5    ", hex(u.r5), "\n")
-	print("r6    ", hex(u.r6), "\n")
-	print("r7    ", hex(u.r7), "\n")
-	print("r8    ", hex(u.r8), "\n")
-	print("r9    ", hex(u.r9), "\n")
-	print("r10   ", hex(u.r10), "\n")
-	print("r11   ", hex(u.r11), "\n")
-	print("r12   ", hex(u.r12), "\n")
-	print("sp    ", hex(u.sp), "\n")
-	print("link  ", hex(u.link), "\n")
-	print("pc    ", hex(u.pc), "\n")
-	print("psr   ", hex(u.psr), "\n")
-}
-
-func sigpanictramp()

libgo/go/runtime/fastlog2.go

@@ -2,6 +2,8 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+// +build ignore
+
 package runtime
 
 import "unsafe"

libgo/go/runtime/fastlog2table.go

@@ -2,6 +2,8 @@
 // Run go generate from src/runtime to update.
 // See mkfastlog2table.go for comments.
 
+// +build ignore
+
 package runtime
 
 const fastlogNumBits = 5

libgo/go/runtime/lfstack_64bit.go

@@ -2,6 +2,8 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+// +build ignore
+
 // +build amd64 arm64 mips64 mips64le ppc64 ppc64le s390x
 
 package runtime

libgo/go/runtime/mmap.go

@@ -2,6 +2,8 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+// +build ignore
+
 // +build !plan9
 // +build !solaris
 // +build !windows

libgo/go/runtime/msan.go

@@ -1,55 +0,0 @@
-// Copyright 2015 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.
-
-// +build msan
-
-package runtime
-
-import (
-	"unsafe"
-)
-
-// Public memory sanitizer API.
-
-func MSanRead(addr unsafe.Pointer, len int) {
-	msanread(addr, uintptr(len))
-}
-
-func MSanWrite(addr unsafe.Pointer, len int) {
-	msanwrite(addr, uintptr(len))
-}
-
-// Private interface for the runtime.
-const msanenabled = true
-
-// If we are running on the system stack, the C program may have
-// marked part of that stack as uninitialized. We don't instrument
-// the runtime, but operations like a slice copy can call msanread
-// anyhow for values on the stack. Just ignore msanread when running
-// on the system stack. The other msan functions are fine.
-func msanread(addr unsafe.Pointer, sz uintptr) {
-	g := getg()
-	if g == g.m.g0 || g == g.m.gsignal {
-		return
-	}
-	domsanread(addr, sz)
-}
-
-//go:noescape
-func domsanread(addr unsafe.Pointer, sz uintptr)
-
-//go:noescape
-func msanwrite(addr unsafe.Pointer, sz uintptr)
-
-//go:noescape
-func msanmalloc(addr unsafe.Pointer, sz uintptr)
-
-//go:noescape
-func msanfree(addr unsafe.Pointer, sz uintptr)
-
-// These are called from msan_amd64.s
-//go:cgo_import_static __msan_read_go
-//go:cgo_import_static __msan_write_go
-//go:cgo_import_static __msan_malloc_go
-//go:cgo_import_static __msan_free_go

libgo/go/runtime/msan0.go

@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+// +build ignore
 // +build !msan
 
 // Dummy MSan support API, used when not built with -msan.

libgo/go/runtime/mstkbar.go

@@ -2,6 +2,8 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+// +build ignore
+
 // Garbage collector: stack barriers
 //
 // Stack barriers enable the garbage collector to determine how much

libgo/go/runtime/os_android.go

@@ -1,15 +0,0 @@
-// Copyright 2014 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.
-
-package runtime
-
-import _ "unsafe" // for go:cgo_export_static and go:cgo_export_dynamic
-
-// Export the main function.
-//
-// Used by the app package to start all-Go Android apps that are
-// loaded via JNI. See golang.org/x/mobile/app.
-
-//go:cgo_export_static main.main
-//go:cgo_export_dynamic main.main

libgo/go/runtime/os_linux_generic.go

@@ -1,48 +0,0 @@
-// 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.
-
-// +build !mips64
-// +build !mips64le
-// +build !s390x
-// +build linux
-
-package runtime
-
-const (
-	_SS_DISABLE  = 2
-	_NSIG        = 65
-	_SI_USER     = 0
-	_SIG_BLOCK   = 0
-	_SIG_UNBLOCK = 1
-	_SIG_SETMASK = 2
-	_RLIMIT_AS   = 9
-)
-
-// It's hard to tease out exactly how big a Sigset is, but
-// rt_sigprocmask crashes if we get it wrong, so if binaries
-// are running, this is right.
-type sigset [2]uint32
-
-type rlimit struct {
-	rlim_cur uintptr
-	rlim_max uintptr
-}
-
-var sigset_all = sigset{^uint32(0), ^uint32(0)}
-
-func sigaddset(mask *sigset, i int) {
-	(*mask)[(i-1)/32] |= 1 << ((uint32(i) - 1) & 31)
-}
-
-func sigdelset(mask *sigset, i int) {
-	(*mask)[(i-1)/32] &^= 1 << ((uint32(i) - 1) & 31)
-}
-
-func sigfillset(mask *uint64) {
-	*mask = ^uint64(0)
-}
-
-func sigcopyset(mask *sigset, m sigmask) {
-	copy((*mask)[:], m[:])
-}

libgo/go/runtime/os_linux_mips64x.go

@@ -1,64 +0,0 @@
-// Copyright 2015 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.
-
-// +build linux
-// +build mips64 mips64le
-
-package runtime
-
-var randomNumber uint32
-
-func archauxv(tag, val uintptr) {
-	switch tag {
-	case _AT_RANDOM:
-		// sysargs filled in startupRandomData, but that
-		// pointer may not be word aligned, so we must treat
-		// it as a byte array.
-		randomNumber = uint32(startupRandomData[4]) | uint32(startupRandomData[5])<<8 |
-			uint32(startupRandomData[6])<<16 | uint32(startupRandomData[7])<<24
-	}
-}
-
-//go:nosplit
-func cputicks() int64 {
-	// Currently cputicks() is used in blocking profiler and to seed fastrand1().
-	// nanotime() is a poor approximation of CPU ticks that is enough for the profiler.
-	// randomNumber provides better seeding of fastrand1.
-	return nanotime() + int64(randomNumber)
-}
-
-const (
-	_SS_DISABLE  = 2
-	_NSIG        = 65
-	_SI_USER     = 0
-	_SIG_BLOCK   = 1
-	_SIG_UNBLOCK = 2
-	_SIG_SETMASK = 3
-	_RLIMIT_AS   = 6
-)
-
-type sigset [2]uint64
-
-type rlimit struct {
-	rlim_cur uintptr
-	rlim_max uintptr
-}
-
-var sigset_all = sigset{^uint64(0), ^uint64(0)}
-
-func sigaddset(mask *sigset, i int) {
-	(*mask)[(i-1)/64] |= 1 << ((uint32(i) - 1) & 63)
-}
-
-func sigdelset(mask *sigset, i int) {
-	(*mask)[(i-1)/64] &^= 1 << ((uint32(i) - 1) & 63)
-}
-
-func sigfillset(mask *[2]uint64) {
-	(*mask)[0], (*mask)[1] = ^uint64(0), ^uint64(0)
-}
-
-func sigcopyset(mask *sigset, m sigmask) {
-	(*mask)[0] = uint64(m[0]) | uint64(m[1])<<32
-}

libgo/go/runtime/os_linux_noauxv.go

@@ -1,10 +0,0 @@
-// Copyright 2014 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.
-
-// +build !amd64,!arm,!arm64,!mips64,!mips64le
-
-package runtime
-
-func archauxv(tag, val uintptr) {
-}

libgo/go/runtime/os_linux_s390x.go

@@ -1,46 +0,0 @@
-// Copyright 2016 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.
-
-package runtime
-
-const (
-	_SS_DISABLE  = 2
-	_NSIG        = 65
-	_SI_USER     = 0
-	_SIG_BLOCK   = 0
-	_SIG_UNBLOCK = 1
-	_SIG_SETMASK = 2
-	_RLIMIT_AS   = 9
-)
-
-type sigset uint64
-
-type rlimit struct {
-	rlim_cur uintptr
-	rlim_max uintptr
-}
-
-var sigset_all = sigset(^uint64(0))
-
-func sigaddset(mask *sigset, i int) {
-	if i > 64 {
-		throw("unexpected signal greater than 64")
-	}
-	*mask |= 1 << (uint(i) - 1)
-}
-
-func sigdelset(mask *sigset, i int) {
-	if i > 64 {
-		throw("unexpected signal greater than 64")
-	}
-	*mask &^= 1 << (uint(i) - 1)
-}
-
-func sigfillset(mask *uint64) {
-	*mask = ^uint64(0)
-}
-
-func sigcopyset(mask *sigset, m sigmask) {
-	*mask = sigset(uint64(m[0]) | uint64(m[1])<<32)
-}

libgo/go/runtime/os_netbsd_386.go

@@ -1,16 +0,0 @@
-// 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.
-
-package runtime
-
-import "unsafe"
-
-func lwp_mcontext_init(mc *mcontextt, stk unsafe.Pointer, mp *m, gp *g, fn uintptr) {
-	// Machine dependent mcontext initialisation for LWP.
-	mc.__gregs[_REG_EIP] = uint32(funcPC(lwp_tramp))
-	mc.__gregs[_REG_UESP] = uint32(uintptr(stk))
-	mc.__gregs[_REG_EBX] = uint32(uintptr(unsafe.Pointer(mp)))
-	mc.__gregs[_REG_EDX] = uint32(uintptr(unsafe.Pointer(gp)))
-	mc.__gregs[_REG_ESI] = uint32(fn)
-}

libgo/go/runtime/os_netbsd_amd64.go

@@ -1,16 +0,0 @@
-// 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.
-
-package runtime
-
-import "unsafe"
-
-func lwp_mcontext_init(mc *mcontextt, stk unsafe.Pointer, mp *m, gp *g, fn uintptr) {
-	// Machine dependent mcontext initialisation for LWP.
-	mc.__gregs[_REG_RIP] = uint64(funcPC(lwp_tramp))
-	mc.__gregs[_REG_RSP] = uint64(uintptr(stk))
-	mc.__gregs[_REG_R8] = uint64(uintptr(unsafe.Pointer(mp)))
-	mc.__gregs[_REG_R9] = uint64(uintptr(unsafe.Pointer(gp)))
-	mc.__gregs[_REG_R12] = uint64(fn)
-}

libgo/go/runtime/os_plan9_arm.go

@@ -1,17 +0,0 @@
-// Copyright 2015 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.
-
-package runtime
-
-func checkgoarm() {
-	return // TODO(minux)
-}
-
-//go:nosplit
-func cputicks() int64 {
-	// Currently cputicks() is used in blocking profiler and to seed runtime·fastrand1().
-	// runtime·nanotime() is a poor approximation of CPU ticks that is enough for the profiler.
-	// TODO: need more entropy to better seed fastrand1.
-	return nanotime()
-}

libgo/go/runtime/print.go

@@ -2,6 +2,8 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+// +build ignore
+
 package runtime
 
 import "unsafe"

libgo/go/runtime/signal2_unix.go

@@ -2,6 +2,8 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+// +build ignore
+
 // +build darwin dragonfly freebsd linux netbsd openbsd
 
 package runtime

libgo/go/runtime/signal_linux_mips64x.go

@@ -1,70 +0,0 @@
-// Copyright 2015 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.
-
-// +build linux
-// +build mips64 mips64le
-
-package runtime
-
-import (
-	"runtime/internal/sys"
-	"unsafe"
-)
-
-type sigctxt struct {
-	info *siginfo
-	ctxt unsafe.Pointer
-}
-
-func (c *sigctxt) regs() *sigcontext { return &(*ucontext)(c.ctxt).uc_mcontext }
-func (c *sigctxt) r0() uint64        { return c.regs().sc_regs[0] }
-func (c *sigctxt) r1() uint64        { return c.regs().sc_regs[1] }
-func (c *sigctxt) r2() uint64        { return c.regs().sc_regs[2] }
-func (c *sigctxt) r3() uint64        { return c.regs().sc_regs[3] }
-func (c *sigctxt) r4() uint64        { return c.regs().sc_regs[4] }
-func (c *sigctxt) r5() uint64        { return c.regs().sc_regs[5] }
-func (c *sigctxt) r6() uint64        { return c.regs().sc_regs[6] }
-func (c *sigctxt) r7() uint64        { return c.regs().sc_regs[7] }
-func (c *sigctxt) r8() uint64        { return c.regs().sc_regs[8] }
-func (c *sigctxt) r9() uint64        { return c.regs().sc_regs[9] }
-func (c *sigctxt) r10() uint64       { return c.regs().sc_regs[10] }
-func (c *sigctxt) r11() uint64       { return c.regs().sc_regs[11] }
-func (c *sigctxt) r12() uint64       { return c.regs().sc_regs[12] }
-func (c *sigctxt) r13() uint64       { return c.regs().sc_regs[13] }
-func (c *sigctxt) r14() uint64       { return c.regs().sc_regs[14] }
-func (c *sigctxt) r15() uint64       { return c.regs().sc_regs[15] }
-func (c *sigctxt) r16() uint64       { return c.regs().sc_regs[16] }
-func (c *sigctxt) r17() uint64       { return c.regs().sc_regs[17] }
-func (c *sigctxt) r18() uint64       { return c.regs().sc_regs[18] }
-func (c *sigctxt) r19() uint64       { return c.regs().sc_regs[19] }
-func (c *sigctxt) r20() uint64       { return c.regs().sc_regs[20] }
-func (c *sigctxt) r21() uint64       { return c.regs().sc_regs[21] }
-func (c *sigctxt) r22() uint64       { return c.regs().sc_regs[22] }
-func (c *sigctxt) r23() uint64       { return c.regs().sc_regs[23] }
-func (c *sigctxt) r24() uint64       { return c.regs().sc_regs[24] }
-func (c *sigctxt) r25() uint64       { return c.regs().sc_regs[25] }
-func (c *sigctxt) r26() uint64       { return c.regs().sc_regs[26] }
-func (c *sigctxt) r27() uint64       { return c.regs().sc_regs[27] }
-func (c *sigctxt) r28() uint64       { return c.regs().sc_regs[28] }
-func (c *sigctxt) r29() uint64       { return c.regs().sc_regs[29] }
-func (c *sigctxt) r30() uint64       { return c.regs().sc_regs[30] }
-func (c *sigctxt) r31() uint64       { return c.regs().sc_regs[31] }
-func (c *sigctxt) sp() uint64        { return c.regs().sc_regs[29] }
-func (c *sigctxt) pc() uint64        { return c.regs().sc_pc }
-func (c *sigctxt) link() uint64      { return c.regs().sc_regs[31] }
-func (c *sigctxt) lo() uint64        { return c.regs().sc_mdlo }
-func (c *sigctxt) hi() uint64        { return c.regs().sc_mdhi }
-
-func (c *sigctxt) sigcode() uint32 { return uint32(c.info.si_code) }
-func (c *sigctxt) sigaddr() uint64 { return c.info.si_addr }
-
-func (c *sigctxt) set_r30(x uint64)  { c.regs().sc_regs[30] = x }
-func (c *sigctxt) set_pc(x uint64)   { c.regs().sc_pc = x }
-func (c *sigctxt) set_sp(x uint64)   { c.regs().sc_regs[29] = x }
-func (c *sigctxt) set_link(x uint64) { c.regs().sc_regs[31] = x }
-
-func (c *sigctxt) set_sigcode(x uint32) { c.info.si_code = int32(x) }
-func (c *sigctxt) set_sigaddr(x uint64) {
-	*(*uintptr)(add(unsafe.Pointer(c.info), 2*sys.PtrSize)) = uintptr(x)
-}

libgo/go/runtime/signal_linux_s390x.go

@@ -1,208 +0,0 @@
-// Copyright 2016 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.
-
-package runtime
-
-import (
-	"runtime/internal/sys"
-	"unsafe"
-)
-
-type sigctxt struct {
-	info *siginfo
-	ctxt unsafe.Pointer
-}
-
-func (c *sigctxt) regs() *sigcontext {
-	return (*sigcontext)(unsafe.Pointer(&(*ucontext)(c.ctxt).uc_mcontext))
-}
-func (c *sigctxt) r0() uint64      { return c.regs().gregs[0] }
-func (c *sigctxt) r1() uint64      { return c.regs().gregs[1] }
-func (c *sigctxt) r2() uint64      { return c.regs().gregs[2] }
-func (c *sigctxt) r3() uint64      { return c.regs().gregs[3] }
-func (c *sigctxt) r4() uint64      { return c.regs().gregs[4] }
-func (c *sigctxt) r5() uint64      { return c.regs().gregs[5] }
-func (c *sigctxt) r6() uint64      { return c.regs().gregs[6] }
-func (c *sigctxt) r7() uint64      { return c.regs().gregs[7] }
-func (c *sigctxt) r8() uint64      { return c.regs().gregs[8] }
-func (c *sigctxt) r9() uint64      { return c.regs().gregs[9] }
-func (c *sigctxt) r10() uint64     { return c.regs().gregs[10] }
-func (c *sigctxt) r11() uint64     { return c.regs().gregs[11] }
-func (c *sigctxt) r12() uint64     { return c.regs().gregs[12] }
-func (c *sigctxt) r13() uint64     { return c.regs().gregs[13] }
-func (c *sigctxt) r14() uint64     { return c.regs().gregs[14] }
-func (c *sigctxt) r15() uint64     { return c.regs().gregs[15] }
-func (c *sigctxt) link() uint64    { return c.regs().gregs[14] }
-func (c *sigctxt) sp() uint64      { return c.regs().gregs[15] }
-func (c *sigctxt) pc() uint64      { return c.regs().psw_addr }
-func (c *sigctxt) sigcode() uint32 { return uint32(c.info.si_code) }
-func (c *sigctxt) sigaddr() uint64 { return c.info.si_addr }
-
-func (c *sigctxt) set_r0(x uint64)      { c.regs().gregs[0] = x }
-func (c *sigctxt) set_r13(x uint64)     { c.regs().gregs[13] = x }
-func (c *sigctxt) set_link(x uint64)    { c.regs().gregs[14] = x }
-func (c *sigctxt) set_sp(x uint64)      { c.regs().gregs[15] = x }
-func (c *sigctxt) set_pc(x uint64)      { c.regs().psw_addr = x }
-func (c *sigctxt) set_sigcode(x uint32) { c.info.si_code = int32(x) }
-func (c *sigctxt) set_sigaddr(x uint64) {
-	*(*uintptr)(add(unsafe.Pointer(c.info), 2*sys.PtrSize)) = uintptr(x)
-}
-
-func dumpregs(c *sigctxt) {
-	print("r0   ", hex(c.r0()), "\t")
-	print("r1   ", hex(c.r1()), "\n")
-	print("r2   ", hex(c.r2()), "\t")
-	print("r3   ", hex(c.r3()), "\n")
-	print("r4   ", hex(c.r4()), "\t")
-	print("r5   ", hex(c.r5()), "\n")
-	print("r6   ", hex(c.r6()), "\t")
-	print("r7   ", hex(c.r7()), "\n")
-	print("r8   ", hex(c.r8()), "\t")
-	print("r9   ", hex(c.r9()), "\n")
-	print("r10  ", hex(c.r10()), "\t")
-	print("r11  ", hex(c.r11()), "\n")
-	print("r12  ", hex(c.r12()), "\t")
-	print("r13  ", hex(c.r13()), "\n")
-	print("r14  ", hex(c.r14()), "\t")
-	print("r15  ", hex(c.r15()), "\n")
-	print("pc   ", hex(c.pc()), "\t")
-	print("link ", hex(c.link()), "\n")
-}
-
-var crashing int32
-
-// May run during STW, so write barriers are not allowed.
-//
-//go:nowritebarrierrec
-func sighandler(sig uint32, info *siginfo, ctxt unsafe.Pointer, gp *g) {
-	_g_ := getg()
-	c := &sigctxt{info, ctxt}
-
-	if sig == _SIGPROF {
-		sigprof(uintptr(c.pc()), uintptr(c.sp()), uintptr(c.link()), gp, _g_.m)
-		return
-	}
-	flags := int32(_SigThrow)
-	if sig < uint32(len(sigtable)) {
-		flags = sigtable[sig].flags
-	}
-	if c.sigcode() != _SI_USER && flags&_SigPanic != 0 {
-		// Make it look like a call to the signal func.
-		// Have to pass arguments out of band since
-		// augmenting the stack frame would break
-		// the unwinding code.
-		gp.sig = sig
-		gp.sigcode0 = uintptr(c.sigcode())
-		gp.sigcode1 = uintptr(c.sigaddr())
-		gp.sigpc = uintptr(c.pc())
-
-		// We arrange link, and pc to pretend the panicking
-		// function calls sigpanic directly.
-		// Always save LINK to stack so that panics in leaf
-		// functions are correctly handled. This smashes
-		// the stack frame but we're not going back there
-		// anyway.
-		sp := c.sp() - sys.MinFrameSize
-		c.set_sp(sp)
-		*(*uint64)(unsafe.Pointer(uintptr(sp))) = c.link()
-
-		pc := uintptr(gp.sigpc)
-
-		// If we don't recognize the PC as code
-		// but we do recognize the link register as code,
-		// then assume this was a call to non-code and treat like
-		// pc == 0, to make unwinding show the context.
-		if pc != 0 && findfunc(pc) == nil && findfunc(uintptr(c.link())) != nil {
-			pc = 0
-		}
-
-		// Don't bother saving PC if it's zero, which is
-		// probably a call to a nil func: the old link register
-		// is more useful in the stack trace.
-		if pc != 0 {
-			c.set_link(uint64(pc))
-		}
-
-		// In case we are panicking from external C code
-		c.set_r0(0)
-		c.set_r13(uint64(uintptr(unsafe.Pointer(gp))))
-		c.set_pc(uint64(funcPC(sigpanic)))
-		return
-	}
-
-	if c.sigcode() == _SI_USER || flags&_SigNotify != 0 {
-		if sigsend(sig) {
-			return
-		}
-	}
-
-	if c.sigcode() == _SI_USER && signal_ignored(sig) {
-		return
-	}
-
-	if flags&_SigKill != 0 {
-		dieFromSignal(int32(sig))
-	}
-
-	if flags&_SigThrow == 0 {
-		return
-	}
-
-	_g_.m.throwing = 1
-	_g_.m.caughtsig.set(gp)
-
-	if crashing == 0 {
-		startpanic()
-	}
-
-	if sig < uint32(len(sigtable)) {
-		print(sigtable[sig].name, "\n")
-	} else {
-		print("Signal ", sig, "\n")
-	}
-
-	print("PC=", hex(c.pc()), " m=", _g_.m.id, "\n")
-	if _g_.m.lockedg != nil && _g_.m.ncgo > 0 && gp == _g_.m.g0 {
-		print("signal arrived during cgo execution\n")
-		gp = _g_.m.lockedg
-	}
-	print("\n")
-
-	level, _, docrash := gotraceback()
-	if level > 0 {
-		goroutineheader(gp)
-		tracebacktrap(uintptr(c.pc()), uintptr(c.sp()), uintptr(c.link()), gp)
-		if crashing > 0 && gp != _g_.m.curg && _g_.m.curg != nil && readgstatus(_g_.m.curg)&^_Gscan == _Grunning {
-			// tracebackothers on original m skipped this one; trace it now.
-			goroutineheader(_g_.m.curg)
-			traceback(^uintptr(0), ^uintptr(0), 0, gp)
-		} else if crashing == 0 {
-			tracebackothers(gp)
-			print("\n")
-		}
-		dumpregs(c)
-	}
-
-	if docrash {
-		crashing++
-		if crashing < sched.mcount {
-			// There are other m's that need to dump their stacks.
-			// Relay SIGQUIT to the next m by sending it to the current process.
-			// All m's that have already received SIGQUIT have signal masks blocking
-			// receipt of any signals, so the SIGQUIT will go to an m that hasn't seen it yet.
-			// When the last m receives the SIGQUIT, it will fall through to the call to
-			// crash below. Just in case the relaying gets botched, each m involved in
-			// the relay sleeps for 5 seconds and then does the crash/exit itself.
-			// In expected operation, the last m has received the SIGQUIT and run
-			// crash/exit and the process is gone, all long before any of the
-			// 5-second sleeps have finished.
-			print("\n-----\n\n")
-			raiseproc(_SIGQUIT)
-			usleep(5 * 1000 * 1000)
-		}
-		crash()
-	}
-
-	exit(2)
-}

libgo/go/runtime/signal_mips64x.go

@@ -1,188 +0,0 @@
-// Copyright 2015 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.
-
-// +build linux
-// +build mips64 mips64le
-
-package runtime
-
-import (
-	"runtime/internal/sys"
-	"unsafe"
-)
-
-func dumpregs(c *sigctxt) {
-	print("r0   ", hex(c.r0()), "\t")
-	print("r1   ", hex(c.r1()), "\n")
-	print("r2   ", hex(c.r2()), "\t")
-	print("r3   ", hex(c.r3()), "\n")
-	print("r4   ", hex(c.r4()), "\t")
-	print("r5   ", hex(c.r5()), "\n")
-	print("r6   ", hex(c.r6()), "\t")
-	print("r7   ", hex(c.r7()), "\n")
-	print("r8   ", hex(c.r8()), "\t")
-	print("r9   ", hex(c.r9()), "\n")
-	print("r10  ", hex(c.r10()), "\t")
-	print("r11  ", hex(c.r11()), "\n")
-	print("r12  ", hex(c.r12()), "\t")
-	print("r13  ", hex(c.r13()), "\n")
-	print("r14  ", hex(c.r14()), "\t")
-	print("r15  ", hex(c.r15()), "\n")
-	print("r16  ", hex(c.r16()), "\t")
-	print("r17  ", hex(c.r17()), "\n")
-	print("r18  ", hex(c.r18()), "\t")
-	print("r19  ", hex(c.r19()), "\n")
-	print("r20  ", hex(c.r20()), "\t")
-	print("r21  ", hex(c.r21()), "\n")
-	print("r22  ", hex(c.r22()), "\t")
-	print("r23  ", hex(c.r23()), "\n")
-	print("r24  ", hex(c.r24()), "\t")
-	print("r25  ", hex(c.r25()), "\n")
-	print("r26  ", hex(c.r26()), "\t")
-	print("r27  ", hex(c.r27()), "\n")
-	print("r28  ", hex(c.r28()), "\t")
-	print("r29  ", hex(c.r29()), "\n")
-	print("r30  ", hex(c.r30()), "\t")
-	print("r31  ", hex(c.r31()), "\n")
-	print("pc   ", hex(c.pc()), "\t")
-	print("link ", hex(c.link()), "\n")
-	print("lo   ", hex(c.lo()), "\t")
-	print("hi   ", hex(c.hi()), "\n")
-}
-
-var crashing int32
-
-// May run during STW, so write barriers are not allowed.
-//
-//go:nowritebarrierrec
-func sighandler(sig uint32, info *siginfo, ctxt unsafe.Pointer, gp *g) {
-	_g_ := getg()
-	c := &sigctxt{info, ctxt}
-
-	if sig == _SIGPROF {
-		sigprof(uintptr(c.pc()), uintptr(c.sp()), uintptr(c.link()), gp, _g_.m)
-		return
-	}
-	flags := int32(_SigThrow)
-	if sig < uint32(len(sigtable)) {
-		flags = sigtable[sig].flags
-	}
-	if c.sigcode() != _SI_USER && flags&_SigPanic != 0 {
-		// Make it look like a call to the signal func.
-		// Have to pass arguments out of band since
-		// augmenting the stack frame would break
-		// the unwinding code.
-		gp.sig = sig
-		gp.sigcode0 = uintptr(c.sigcode())
-		gp.sigcode1 = uintptr(c.sigaddr())
-		gp.sigpc = uintptr(c.pc())
-
-		// We arrange link, and pc to pretend the panicking
-		// function calls sigpanic directly.
-		// Always save LINK to stack so that panics in leaf
-		// functions are correctly handled. This smashes
-		// the stack frame but we're not going back there
-		// anyway.
-		sp := c.sp() - sys.PtrSize
-		c.set_sp(sp)
-		*(*uint64)(unsafe.Pointer(uintptr(sp))) = c.link()
-
-		pc := gp.sigpc
-
-		// If we don't recognize the PC as code
-		// but we do recognize the link register as code,
-		// then assume this was a call to non-code and treat like
-		// pc == 0, to make unwinding show the context.
-		if pc != 0 && findfunc(pc) == nil && findfunc(uintptr(c.link())) != nil {
-			pc = 0
-		}
-
-		// Don't bother saving PC if it's zero, which is
-		// probably a call to a nil func: the old link register
-		// is more useful in the stack trace.
-		if pc != 0 {
-			c.set_link(uint64(pc))
-		}
-
-		// In case we are panicking from external C code
-		c.set_r30(uint64(uintptr(unsafe.Pointer(gp))))
-		c.set_pc(uint64(funcPC(sigpanic)))
-		return
-	}
-
-	if c.sigcode() == _SI_USER || flags&_SigNotify != 0 {
-		if sigsend(sig) {
-			return
-		}
-	}
-
-	if c.sigcode() == _SI_USER && signal_ignored(sig) {
-		return
-	}
-
-	if flags&_SigKill != 0 {
-		dieFromSignal(int32(sig))
-	}
-
-	if flags&_SigThrow == 0 {
-		return
-	}
-
-	_g_.m.throwing = 1
-	_g_.m.caughtsig.set(gp)
-
-	if crashing == 0 {
-		startpanic()
-	}
-
-	if sig < uint32(len(sigtable)) {
-		print(sigtable[sig].name, "\n")
-	} else {
-		print("Signal ", sig, "\n")
-	}
-
-	print("PC=", hex(c.pc()), " m=", _g_.m.id, "\n")
-	if _g_.m.lockedg != nil && _g_.m.ncgo > 0 && gp == _g_.m.g0 {
-		print("signal arrived during cgo execution\n")
-		gp = _g_.m.lockedg
-	}
-	print("\n")
-
-	level, _, docrash := gotraceback()
-	if level > 0 {
-		goroutineheader(gp)
-		tracebacktrap(uintptr(c.pc()), uintptr(c.sp()), uintptr(c.link()), gp)
-		if crashing > 0 && gp != _g_.m.curg && _g_.m.curg != nil && readgstatus(_g_.m.curg)&^_Gscan == _Grunning {
-			// tracebackothers on original m skipped this one; trace it now.
-			goroutineheader(_g_.m.curg)
-			traceback(^uintptr(0), ^uintptr(0), 0, gp)
-		} else if crashing == 0 {
-			tracebackothers(gp)
-			print("\n")
-		}
-		dumpregs(c)
-	}
-
-	if docrash {
-		crashing++
-		if crashing < sched.mcount {
-			// There are other m's that need to dump their stacks.
-			// Relay SIGQUIT to the next m by sending it to the current process.
-			// All m's that have already received SIGQUIT have signal masks blocking
-			// receipt of any signals, so the SIGQUIT will go to an m that hasn't seen it yet.
-			// When the last m receives the SIGQUIT, it will fall through to the call to
-			// crash below. Just in case the relaying gets botched, each m involved in
-			// the relay sleeps for 5 seconds and then does the crash/exit itself.
-			// In expected operation, the last m has received the SIGQUIT and run
-			// crash/exit and the process is gone, all long before any of the
-			// 5-second sleeps have finished.
-			print("\n-----\n\n")
-			raiseproc(_SIGQUIT)
-			usleep(5 * 1000 * 1000)
-		}
-		crash()
-	}
-
-	exit(2)
-}

libgo/go/runtime/signal_sigtramp.go

@@ -2,6 +2,8 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+// +build ignore
+
 // +build dragonfly linux netbsd
 
 package runtime

libgo/go/runtime/sigtab_linux_generic.go

@@ -1,82 +0,0 @@
-// 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.
-
-// +build !mips64
-// +build !mips64le
-// +build linux
-
-package runtime
-
-type sigTabT struct {
-	flags int32
-	name  string
-}
-
-var sigtable = [...]sigTabT{
-	/* 0 */ {0, "SIGNONE: no trap"},
-	/* 1 */ {_SigNotify + _SigKill, "SIGHUP: terminal line hangup"},
-	/* 2 */ {_SigNotify + _SigKill, "SIGINT: interrupt"},
-	/* 3 */ {_SigNotify + _SigThrow, "SIGQUIT: quit"},
-	/* 4 */ {_SigThrow + _SigUnblock, "SIGILL: illegal instruction"},
-	/* 5 */ {_SigThrow + _SigUnblock, "SIGTRAP: trace trap"},
-	/* 6 */ {_SigNotify + _SigThrow, "SIGABRT: abort"},
-	/* 7 */ {_SigPanic + _SigUnblock, "SIGBUS: bus error"},
-	/* 8 */ {_SigPanic + _SigUnblock, "SIGFPE: floating-point exception"},
-	/* 9 */ {0, "SIGKILL: kill"},
-	/* 10 */ {_SigNotify, "SIGUSR1: user-defined signal 1"},
-	/* 11 */ {_SigPanic + _SigUnblock, "SIGSEGV: segmentation violation"},
-	/* 12 */ {_SigNotify, "SIGUSR2: user-defined signal 2"},
-	/* 13 */ {_SigNotify, "SIGPIPE: write to broken pipe"},
-	/* 14 */ {_SigNotify, "SIGALRM: alarm clock"},
-	/* 15 */ {_SigNotify + _SigKill, "SIGTERM: termination"},
-	/* 16 */ {_SigThrow + _SigUnblock, "SIGSTKFLT: stack fault"},
-	/* 17 */ {_SigNotify + _SigUnblock, "SIGCHLD: child status has changed"},
-	/* 18 */ {_SigNotify + _SigDefault, "SIGCONT: continue"},
-	/* 19 */ {0, "SIGSTOP: stop, unblockable"},
-	/* 20 */ {_SigNotify + _SigDefault, "SIGTSTP: keyboard stop"},
-	/* 21 */ {_SigNotify + _SigDefault, "SIGTTIN: background read from tty"},
-	/* 22 */ {_SigNotify + _SigDefault, "SIGTTOU: background write to tty"},
-	/* 23 */ {_SigNotify, "SIGURG: urgent condition on socket"},
-	/* 24 */ {_SigNotify, "SIGXCPU: cpu limit exceeded"},
-	/* 25 */ {_SigNotify, "SIGXFSZ: file size limit exceeded"},
-	/* 26 */ {_SigNotify, "SIGVTALRM: virtual alarm clock"},
-	/* 27 */ {_SigNotify + _SigUnblock, "SIGPROF: profiling alarm clock"},
-	/* 28 */ {_SigNotify, "SIGWINCH: window size change"},
-	/* 29 */ {_SigNotify, "SIGIO: i/o now possible"},
-	/* 30 */ {_SigNotify, "SIGPWR: power failure restart"},
-	/* 31 */ {_SigThrow, "SIGSYS: bad system call"},
-	/* 32 */ {_SigSetStack + _SigUnblock, "signal 32"}, /* SIGCANCEL; see issue 6997 */
-	/* 33 */ {_SigSetStack + _SigUnblock, "signal 33"}, /* SIGSETXID; see issues 3871, 9400, 12498 */
-	/* 34 */ {_SigNotify, "signal 34"},
-	/* 35 */ {_SigNotify, "signal 35"},
-	/* 36 */ {_SigNotify, "signal 36"},
-	/* 37 */ {_SigNotify, "signal 37"},
-	/* 38 */ {_SigNotify, "signal 38"},
-	/* 39 */ {_SigNotify, "signal 39"},
-	/* 40 */ {_SigNotify, "signal 40"},
-	/* 41 */ {_SigNotify, "signal 41"},
-	/* 42 */ {_SigNotify, "signal 42"},
-	/* 43 */ {_SigNotify, "signal 43"},
-	/* 44 */ {_SigNotify, "signal 44"},
-	/* 45 */ {_SigNotify, "signal 45"},
-	/* 46 */ {_SigNotify, "signal 46"},
-	/* 47 */ {_SigNotify, "signal 47"},
-	/* 48 */ {_SigNotify, "signal 48"},
-	/* 49 */ {_SigNotify, "signal 49"},
-	/* 50 */ {_SigNotify, "signal 50"},
-	/* 51 */ {_SigNotify, "signal 51"},
-	/* 52 */ {_SigNotify, "signal 52"},
-	/* 53 */ {_SigNotify, "signal 53"},
-	/* 54 */ {_SigNotify, "signal 54"},
-	/* 55 */ {_SigNotify, "signal 55"},
-	/* 56 */ {_SigNotify, "signal 56"},
-	/* 57 */ {_SigNotify, "signal 57"},
-	/* 58 */ {_SigNotify, "signal 58"},
-	/* 59 */ {_SigNotify, "signal 59"},
-	/* 60 */ {_SigNotify, "signal 60"},
-	/* 61 */ {_SigNotify, "signal 61"},
-	/* 62 */ {_SigNotify, "signal 62"},
-	/* 63 */ {_SigNotify, "signal 63"},
-	/* 64 */ {_SigNotify, "signal 64"},
-}

libgo/go/runtime/sigtab_linux_mips64x.go

@@ -1,81 +0,0 @@
-// Copyright 2015 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.
-
-// +build mips64 mips64le
-// +build linux
-
-package runtime
-
-type sigTabT struct {
-	flags int32
-	name  string
-}
-
-var sigtable = [...]sigTabT{
-	/* 0 */ {0, "SIGNONE: no trap"},
-	/* 1 */ {_SigNotify + _SigKill, "SIGHUP: terminal line hangup"},
-	/* 2 */ {_SigNotify + _SigKill, "SIGINT: interrupt"},
-	/* 3 */ {_SigNotify + _SigThrow, "SIGQUIT: quit"},
-	/* 4 */ {_SigThrow + _SigUnblock, "SIGILL: illegal instruction"},
-	/* 5 */ {_SigThrow + _SigUnblock, "SIGTRAP: trace trap"},
-	/* 6 */ {_SigNotify + _SigThrow, "SIGABRT: abort"},
-	/* 7 */ {_SigThrow, "SIGEMT"},
-	/* 8 */ {_SigPanic + _SigUnblock, "SIGFPE: floating-point exception"},
-	/* 9 */ {0, "SIGKILL: kill"},
-	/* 10 */ {_SigPanic + _SigUnblock, "SIGBUS: bus error"},
-	/* 11 */ {_SigPanic + _SigUnblock, "SIGSEGV: segmentation violation"},
-	/* 12 */ {_SigThrow, "SIGSYS: bad system call"},
-	/* 13 */ {_SigNotify, "SIGPIPE: write to broken pipe"},
-	/* 14 */ {_SigNotify, "SIGALRM: alarm clock"},
-	/* 15 */ {_SigNotify + _SigKill, "SIGTERM: termination"},
-	/* 16 */ {_SigNotify, "SIGUSR1: user-defined signal 1"},
-	/* 17 */ {_SigNotify, "SIGUSR2: user-defined signal 2"},
-	/* 18 */ {_SigNotify + _SigUnblock, "SIGCHLD: child status has changed"},
-	/* 19 */ {_SigNotify, "SIGPWR: power failure restart"},
-	/* 20 */ {_SigNotify, "SIGWINCH: window size change"},
-	/* 21 */ {_SigNotify, "SIGURG: urgent condition on socket"},
-	/* 22 */ {_SigNotify, "SIGIO: i/o now possible"},
-	/* 23 */ {0, "SIGSTOP: stop, unblockable"},
-	/* 24 */ {_SigNotify + _SigDefault, "SIGTSTP: keyboard stop"},
-	/* 25 */ {_SigNotify + _SigDefault, "SIGCONT: continue"},
-	/* 26 */ {_SigNotify + _SigDefault, "SIGTTIN: background read from tty"},
-	/* 27 */ {_SigNotify + _SigDefault, "SIGTTOU: background write to tty"},
-	/* 28 */ {_SigNotify, "SIGVTALRM: virtual alarm clock"},
-	/* 29 */ {_SigNotify + _SigUnblock, "SIGPROF: profiling alarm clock"},
-	/* 30 */ {_SigNotify, "SIGXCPU: cpu limit exceeded"},
-	/* 31 */ {_SigNotify, "SIGXFSZ: file size limit exceeded"},
-	/* 32 */ {_SigSetStack + _SigUnblock, "signal 32"}, /* SIGCANCEL; see issue 6997 */
-	/* 33 */ {_SigSetStack + _SigUnblock, "signal 33"}, /* SIGSETXID; see issues 3871, 9400, 12498 */
-	/* 34 */ {_SigNotify, "signal 34"},
-	/* 35 */ {_SigNotify, "signal 35"},
-	/* 36 */ {_SigNotify, "signal 36"},
-	/* 37 */ {_SigNotify, "signal 37"},
-	/* 38 */ {_SigNotify, "signal 38"},
-	/* 39 */ {_SigNotify, "signal 39"},
-	/* 40 */ {_SigNotify, "signal 40"},
-	/* 41 */ {_SigNotify, "signal 41"},
-	/* 42 */ {_SigNotify, "signal 42"},
-	/* 43 */ {_SigNotify, "signal 43"},
-	/* 44 */ {_SigNotify, "signal 44"},
-	/* 45 */ {_SigNotify, "signal 45"},
-	/* 46 */ {_SigNotify, "signal 46"},
-	/* 47 */ {_SigNotify, "signal 47"},
-	/* 48 */ {_SigNotify, "signal 48"},
-	/* 49 */ {_SigNotify, "signal 49"},
-	/* 50 */ {_SigNotify, "signal 50"},
-	/* 51 */ {_SigNotify, "signal 51"},
-	/* 52 */ {_SigNotify, "signal 52"},
-	/* 53 */ {_SigNotify, "signal 53"},
-	/* 54 */ {_SigNotify, "signal 54"},
-	/* 55 */ {_SigNotify, "signal 55"},
-	/* 56 */ {_SigNotify, "signal 56"},
-	/* 57 */ {_SigNotify, "signal 57"},
-	/* 58 */ {_SigNotify, "signal 58"},
-	/* 59 */ {_SigNotify, "signal 59"},
-	/* 60 */ {_SigNotify, "signal 60"},
-	/* 61 */ {_SigNotify, "signal 61"},
-	/* 62 */ {_SigNotify, "signal 62"},
-	/* 63 */ {_SigNotify, "signal 63"},
-	/* 64 */ {_SigNotify, "signal 64"},
-}

libgo/go/runtime/stack.go

@@ -2,6 +2,8 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+// +build ignore
+
 package runtime
 
 import (

libgo/go/runtime/sys_mips64x.go

@@ -1,43 +0,0 @@
-// Copyright 2015 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.
-
-// +build mips64 mips64le
-
-package runtime
-
-import "unsafe"
-
-// adjust Gobuf as if it executed a call to fn with context ctxt
-// and then did an immediate Gosave.
-func gostartcall(buf *gobuf, fn, ctxt unsafe.Pointer) {
-	if buf.lr != 0 {
-		throw("invalid use of gostartcall")
-	}
-	buf.lr = buf.pc
-	buf.pc = uintptr(fn)
-	buf.ctxt = ctxt
-}
-
-// Called to rewind context saved during morestack back to beginning of function.
-// To help us, the linker emits a jmp back to the beginning right after the
-// call to morestack. We just have to decode and apply that jump.
-func rewindmorestack(buf *gobuf) {
-	var inst uint32
-	if buf.pc&3 == 0 && buf.pc != 0 {
-		inst = *(*uint32)(unsafe.Pointer(buf.pc))
-		if inst>>26 == 2 { // JMP addr
-			//print("runtime: rewind pc=", hex(buf.pc), " to pc=", hex(buf.pc &^ uintptr(1<<28-1) | uintptr((inst&^0xfc000000)<<2)), "\n");
-			buf.pc &^= 1<<28 - 1
-			buf.pc |= uintptr((inst &^ 0xfc000000) << 2)
-			return
-		}
-		if inst>>16 == 0x1000 { // BEQ	R0, R0, offset
-			//print("runtime: rewind pc=", hex(buf.pc), " to pc=", hex(buf.pc + uintptr(int32(int16(inst&0xffff))<<2 + 4)), "\n");
-			buf.pc += uintptr(int32(int16(inst&0xffff))<<2 + 4)
-			return
-		}
-	}
-	print("runtime: pc=", hex(buf.pc), " ", hex(inst), "\n")
-	throw("runtime: misuse of rewindmorestack")
-}

libgo/go/runtime/sys_nonppc64x.go

@@ -1,10 +0,0 @@
-// Copyright 2015 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.
-
-// +build !ppc64,!ppc64le
-
-package runtime
-
-func prepGoExitFrame(sp uintptr) {
-}

libgo/go/runtime/sys_s390x.go

@@ -1,45 +0,0 @@
-// Copyright 2016 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.
-
-package runtime
-
-import "unsafe"
-
-// adjust Gobuf as if it executed a call to fn with context ctxt
-// and then did an immediate Gosave.
-func gostartcall(buf *gobuf, fn, ctxt unsafe.Pointer) {
-	if buf.lr != 0 {
-		throw("invalid use of gostartcall")
-	}
-	buf.lr = buf.pc
-	buf.pc = uintptr(fn)
-	buf.ctxt = ctxt
-}
-
-// Called to rewind context saved during morestack back to beginning of function.
-// To help us, the linker emits a jmp back to the beginning right after the
-// call to morestack. We just have to decode and apply that jump.
-func rewindmorestack(buf *gobuf) {
-	var inst uint64
-	if buf.pc&1 == 0 && buf.pc != 0 {
-		inst = *(*uint64)(unsafe.Pointer(buf.pc))
-		switch inst >> 48 {
-		case 0xa7f4: // BRC (branch relative on condition) instruction.
-			inst >>= 32
-			inst &= 0xFFFF
-			offset := int64(int16(inst))
-			offset <<= 1
-			buf.pc += uintptr(offset)
-			return
-		case 0xc0f4: // BRCL (branch relative on condition long) instruction.
-			inst >>= 16
-			inst = inst & 0xFFFFFFFF
-			inst = (inst << 1) & 0xFFFFFFFF
-			buf.pc += uintptr(int32(inst))
-			return
-		}
-	}
-	print("runtime: pc=", hex(buf.pc), " ", hex(inst), "\n")
-	throw("runtime: misuse of rewindmorestack")
-}

libgo/go/runtime/vlrt.go

@@ -1,257 +0,0 @@
-// Inferno's libkern/vlrt-arm.c
-// http://code.google.com/p/inferno-os/source/browse/libkern/vlrt-arm.c
-//
-//         Copyright © 1994-1999 Lucent Technologies Inc. All rights reserved.
-//         Revisions Copyright © 2000-2007 Vita Nuova Holdings Limited (www.vitanuova.com).  All rights reserved.
-//         Portions Copyright 2009 The Go Authors. All rights reserved.
-//
-// Permission is hereby granted, free of charge, to any person obtaining a copy
-// of this software and associated documentation files (the "Software"), to deal
-// in the Software without restriction, including without limitation the rights
-// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-// copies of the Software, and to permit persons to whom the Software is
-// furnished to do so, subject to the following conditions:
-//
-// The above copyright notice and this permission notice shall be included in
-// all copies or substantial portions of the Software.
-//
-// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
-// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
-// THE SOFTWARE.
-
-// +build arm 386
-
-package runtime
-
-import "unsafe"
-
-const (
-	sign32 = 1 << (32 - 1)
-	sign64 = 1 << (64 - 1)
-)
-
-func float64toint64(d float64) (y uint64) {
-	_d2v(&y, d)
-	return
-}
-
-func float64touint64(d float64) (y uint64) {
-	_d2v(&y, d)
-	return
-}
-
-func int64tofloat64(y int64) float64 {
-	if y < 0 {
-		return -uint64tofloat64(-uint64(y))
-	}
-	return uint64tofloat64(uint64(y))
-}
-
-func uint64tofloat64(y uint64) float64 {
-	hi := float64(uint32(y >> 32))
-	lo := float64(uint32(y))
-	d := hi*(1<<32) + lo
-	return d
-}
-
-func _d2v(y *uint64, d float64) {
-	x := *(*uint64)(unsafe.Pointer(&d))
-
-	xhi := uint32(x>>32)&0xfffff | 0x100000
-	xlo := uint32(x)
-	sh := 1075 - int32(uint32(x>>52)&0x7ff)
-
-	var ylo, yhi uint32
-	if sh >= 0 {
-		sh := uint32(sh)
-		/* v = (hi||lo) >> sh */
-		if sh < 32 {
-			if sh == 0 {
-				ylo = xlo
-				yhi = xhi
-			} else {
-				ylo = xlo>>sh | xhi<<(32-sh)
-				yhi = xhi >> sh
-			}
-		} else {
-			if sh == 32 {
-				ylo = xhi
-			} else if sh < 64 {
-				ylo = xhi >> (sh - 32)
-			}
-		}
-	} else {
-		/* v = (hi||lo) << -sh */
-		sh := uint32(-sh)
-		if sh <= 11 {
-			ylo = xlo << sh
-			yhi = xhi<<sh | xlo>>(32-sh)
-		} else {
-			/* overflow */
-			yhi = uint32(d) /* causes something awful */
-		}
-	}
-	if x&sign64 != 0 {
-		if ylo != 0 {
-			ylo = -ylo
-			yhi = ^yhi
-		} else {
-			yhi = -yhi
-		}
-	}
-
-	*y = uint64(yhi)<<32 | uint64(ylo)
-}
-
-func uint64div(n, d uint64) uint64 {
-	// Check for 32 bit operands
-	if uint32(n>>32) == 0 && uint32(d>>32) == 0 {
-		if uint32(d) == 0 {
-			panicdivide()
-		}
-		return uint64(uint32(n) / uint32(d))
-	}
-	q, _ := dodiv(n, d)
-	return q
-}
-
-func uint64mod(n, d uint64) uint64 {
-	// Check for 32 bit operands
-	if uint32(n>>32) == 0 && uint32(d>>32) == 0 {
-		if uint32(d) == 0 {
-			panicdivide()
-		}
-		return uint64(uint32(n) % uint32(d))
-	}
-	_, r := dodiv(n, d)
-	return r
-}
-
-func int64div(n, d int64) int64 {
-	// Check for 32 bit operands
-	if int64(int32(n)) == n && int64(int32(d)) == d {
-		if int32(n) == -0x80000000 && int32(d) == -1 {
-			// special case: 32-bit -0x80000000 / -1 = -0x80000000,
-			// but 64-bit -0x80000000 / -1 = 0x80000000.
-			return 0x80000000
-		}
-		if int32(d) == 0 {
-			panicdivide()
-		}
-		return int64(int32(n) / int32(d))
-	}
-
-	nneg := n < 0
-	dneg := d < 0
-	if nneg {
-		n = -n
-	}
-	if dneg {
-		d = -d
-	}
-	uq, _ := dodiv(uint64(n), uint64(d))
-	q := int64(uq)
-	if nneg != dneg {
-		q = -q
-	}
-	return q
-}
-
-func int64mod(n, d int64) int64 {
-	// Check for 32 bit operands
-	if int64(int32(n)) == n && int64(int32(d)) == d {
-		if int32(d) == 0 {
-			panicdivide()
-		}
-		return int64(int32(n) % int32(d))
-	}
-
-	nneg := n < 0
-	if nneg {
-		n = -n
-	}
-	if d < 0 {
-		d = -d
-	}
-	_, ur := dodiv(uint64(n), uint64(d))
-	r := int64(ur)
-	if nneg {
-		r = -r
-	}
-	return r
-}
-
-//go:noescape
-func _mul64by32(lo64 *uint64, a uint64, b uint32) (hi32 uint32)
-
-//go:noescape
-func _div64by32(a uint64, b uint32, r *uint32) (q uint32)
-
-func dodiv(n, d uint64) (q, r uint64) {
-	if GOARCH == "arm" {
-		// arm doesn't have a division instruction, so
-		// slowdodiv is the best that we can do.
-		return slowdodiv(n, d)
-	}
-
-	if d > n {
-		return 0, n
-	}
-
-	if uint32(d>>32) != 0 {
-		t := uint32(n>>32) / uint32(d>>32)
-		var lo64 uint64
-		hi32 := _mul64by32(&lo64, d, t)
-		if hi32 != 0 || lo64 > n {
-			return slowdodiv(n, d)
-		}
-		return uint64(t), n - lo64
-	}
-
-	// d is 32 bit
-	var qhi uint32
-	if uint32(n>>32) >= uint32(d) {
-		if uint32(d) == 0 {
-			panicdivide()
-		}
-		qhi = uint32(n>>32) / uint32(d)
-		n -= uint64(uint32(d)*qhi) << 32
-	} else {
-		qhi = 0
-	}
-
-	var rlo uint32
-	qlo := _div64by32(n, uint32(d), &rlo)
-	return uint64(qhi)<<32 + uint64(qlo), uint64(rlo)
-}
-
-func slowdodiv(n, d uint64) (q, r uint64) {
-	if d == 0 {
-		panicdivide()
-	}
-
-	// Set up the divisor and find the number of iterations needed.
-	capn := n
-	if n >= sign64 {
-		capn = sign64
-	}
-	i := 0
-	for d < capn {
-		d <<= 1
-		i++
-	}
-
-	for ; i >= 0; i-- {
-		q <<= 1
-		if n >= d {
-			n -= d
-			q |= 1
-		}
-		d >>= 1
-	}
-	return q, n
-}

libgo/go/runtime/write_err.go

@@ -1,13 +0,0 @@
-// 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.
-
-// +build !android
-
-package runtime
-
-import "unsafe"
-
-func writeErr(b []byte) {
-	write(2, unsafe.Pointer(&b[0]), int32(len(b)))
-}

libgo/go/runtime/write_err_android.go

@@ -1,160 +0,0 @@
-// Copyright 2014 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.
-
-package runtime
-
-import "unsafe"
-
-var (
-	writeHeader = []byte{6 /* ANDROID_LOG_ERROR */, 'G', 'o', 0}
-	writePath   = []byte("/dev/log/main\x00")
-	writeLogd   = []byte("/dev/socket/logdw\x00")
-
-	// guarded by printlock/printunlock.
-	writeFD  uintptr
-	writeBuf [1024]byte
-	writePos int
-)
-
-// Prior to Android-L, logging was done through writes to /dev/log files implemented
-// in kernel ring buffers. In Android-L, those /dev/log files are no longer
-// accessible and logging is done through a centralized user-mode logger, logd.
-//
-// https://android.googlesource.com/platform/system/core/+/master/liblog/logd_write.c
-type loggerType int32
-
-const (
-	unknown loggerType = iota
-	legacy
-	logd
-	// TODO(hakim): logging for emulator?
-)
-
-var logger loggerType
-
-func writeErr(b []byte) {
-	if logger == unknown {
-		// Use logd if /dev/socket/logdw is available.
-		if v := uintptr(access(&writeLogd[0], 0x02 /* W_OK */)); v == 0 {
-			logger = logd
-			initLogd()
-		} else {
-			logger = legacy
-			initLegacy()
-		}
-	}
-
-	// Write to stderr for command-line programs.
-	write(2, unsafe.Pointer(&b[0]), int32(len(b)))
-
-	// Log format: "<header>\x00<message m bytes>\x00"
-	//
-	// <header>
-	//   In legacy mode: "<priority 1 byte><tag n bytes>".
-	//   In logd mode: "<android_log_header_t 11 bytes><priority 1 byte><tag n bytes>"
-	//
-	// The entire log needs to be delivered in a single syscall (the NDK
-	// does this with writev). Each log is its own line, so we need to
-	// buffer writes until we see a newline.
-	var hlen int
-	switch logger {
-	case logd:
-		hlen = writeLogdHeader()
-	case legacy:
-		hlen = len(writeHeader)
-	}
-
-	dst := writeBuf[hlen:]
-	for _, v := range b {
-		if v == 0 { // android logging won't print a zero byte
-			v = '0'
-		}
-		dst[writePos] = v
-		writePos++
-		if v == '\n' || writePos == len(dst)-1 {
-			dst[writePos] = 0
-			write(writeFD, unsafe.Pointer(&writeBuf[0]), int32(hlen+writePos))
-			memclrBytes(dst)
-			writePos = 0
-		}
-	}
-}
-
-func initLegacy() {
-	// In legacy mode, logs are written to /dev/log/main
-	writeFD = uintptr(open(&writePath[0], 0x1 /* O_WRONLY */, 0))
-	if writeFD == 0 {
-		// It is hard to do anything here. Write to stderr just
-		// in case user has root on device and has run
-		//	adb shell setprop log.redirect-stdio true
-		msg := []byte("runtime: cannot open /dev/log/main\x00")
-		write(2, unsafe.Pointer(&msg[0]), int32(len(msg)))
-		exit(2)
-	}
-
-	// Prepopulate the invariant header part.
-	copy(writeBuf[:len(writeHeader)], writeHeader)
-}
-
-// used in initLogdWrite but defined here to avoid heap allocation.
-var logdAddr sockaddr_un
-
-func initLogd() {
-	// In logd mode, logs are sent to the logd via a unix domain socket.
-	logdAddr.family = _AF_UNIX
-	copy(logdAddr.path[:], writeLogd)
-
-	// We are not using non-blocking I/O because writes taking this path
-	// are most likely triggered by panic, we cannot think of the advantage of
-	// non-blocking I/O for panic but see disadvantage (dropping panic message),
-	// and blocking I/O simplifies the code a lot.
-	fd := socket(_AF_UNIX, _SOCK_DGRAM|_O_CLOEXEC, 0)
-	if fd < 0 {
-		msg := []byte("runtime: cannot create a socket for logging\x00")
-		write(2, unsafe.Pointer(&msg[0]), int32(len(msg)))
-		exit(2)
-	}
-
-	errno := connect(fd, unsafe.Pointer(&logdAddr), int32(unsafe.Sizeof(logdAddr)))
-	if errno < 0 {
-		msg := []byte("runtime: cannot connect to /dev/socket/logdw\x00")
-		write(2, unsafe.Pointer(&msg[0]), int32(len(msg)))
-		// TODO(hakim): or should we just close fd and hope for better luck next time?
-		exit(2)
-	}
-	writeFD = uintptr(fd)
-
-	// Prepopulate invariant part of the header.
-	// The first 11 bytes will be populated later in writeLogdHeader.
-	copy(writeBuf[11:11+len(writeHeader)], writeHeader)
-}
-
-// writeLogdHeader populates the header and returns the length of the payload.
-func writeLogdHeader() int {
-	hdr := writeBuf[:11]
-
-	// The first 11 bytes of the header corresponds to android_log_header_t
-	// as defined in system/core/include/private/android_logger.h
-	//   hdr[0] log type id (unsigned char), defined in <log/log.h>
-	//   hdr[1:2] tid (uint16_t)
-	//   hdr[3:11] log_time defined in <log/log_read.h>
-	//      hdr[3:7] sec unsigned uint32, little endian.
-	//      hdr[7:11] nsec unsigned uint32, little endian.
-	hdr[0] = 0 // LOG_ID_MAIN
-	sec, nsec := time_now()
-	packUint32(hdr[3:7], uint32(sec))
-	packUint32(hdr[7:11], uint32(nsec))
-
-	// TODO(hakim):  hdr[1:2] = gettid?
-
-	return 11 + len(writeHeader)
-}
-
-func packUint32(b []byte, v uint32) {
-	// little-endian.
-	b[0] = byte(v)
-	b[1] = byte(v >> 8)
-	b[2] = byte(v >> 16)
-	b[3] = byte(v >> 24)
-}

libgo/go/strings/strings_amd64.go

@@ -2,6 +2,8 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+// +build ignore
+
 package strings
 
 // indexShortStr returns the index of the first instance of c in s, or -1 if c is not present in s.

libgo/go/strings/strings_generic.go

@@ -2,8 +2,6 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// +build !amd64
-
 package strings
 
 // TODO: implements short string optimization on non amd64 platforms

libgo/go/syscall/errstr.go

@@ -4,6 +4,8 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+// +build !linux
+
 package syscall
 
 //sysnb	strerror_r(errnum int, buf []byte) (err Errno)

libgo/go/syscall/errstr_linux.go

@@ -1,9 +1,12 @@
-// errstr_rtems.go -- RTEMS specific error strings.
+// errstr_linux.go -- GNU/Linux specific error strings.
 
 // Copyright 2010 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.
 
+// We use this rather than errstr.go because on GNU/Linux sterror_r
+// returns a pointer to the error message, and may not use buf at all.
+
 package syscall
 
 import "unsafe"

libgo/go/syscall/errstr_nor.go

@@ -1,41 +0,0 @@
-// errstr.go -- Error strings when there is no strerror_r.
-
-// Copyright 2011 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.
-
-package syscall
-
-import (
-	"sync"
-	"unsafe"
-)
-
-//sysnb	strerror(errnum int) (buf *byte)
-//strerror(errnum _C_int) *byte
-
-var errstr_lock sync.Mutex
-
-func Errstr(errno int) string {
-	errstr_lock.Lock()
-
-	bp := strerror(errno)
-	b := (*[1000]byte)(unsafe.Pointer(bp))
-	i := 0
-	for b[i] != 0 {
-		i++
-	}
-
-	// Lowercase first letter: Bad -> bad, but STREAM -> STREAM.
-	var s string
-	if i > 1 && 'A' <= b[0] && b[0] <= 'Z' && 'a' <= b[1] && b[1] <= 'z' {
-		c := b[0] + 'a' - 'A'
-		s = string(c) + string(b[1:i])
-	} else {
-		s = string(b[:i])
-	}
-
-	errstr_lock.Unlock()
-
-	return s
-}

libgo/go/syscall/exec_bsd.go

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// +build darwin dragonfly freebsd netbsd openbsd
+// +build darwin dragonfly freebsd netbsd openbsd solaris
 
 package syscall
 

libgo/go/syscall/exec_stubs.go

@@ -2,6 +2,8 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+// +build rtems
+
 // Stubs for fork, exec and wait.
 
 package syscall

libgo/go/syscall/libcall_bsd.go

@@ -2,6 +2,8 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+// +build darwin dragonfly freebsd netbsd openbsd solaris
+
 // BSD library calls.
 
 package syscall

libgo/go/syscall/libcall_irix.go

@@ -2,6 +2,8 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+// +build irix
+
 package syscall
 
 //sysnb raw_ptrace(request int, pid int, addr *byte, data *byte) (err Errno)

libgo/go/syscall/libcall_linux_ustat.go

@@ -4,6 +4,7 @@
 
 // GNU/Linux library ustat call.
 // This is not supported on some kernels, such as arm64.
+// +build !arm64
 
 package syscall
 

libgo/go/syscall/libcall_posix_largefile.go

@@ -2,6 +2,8 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+// +build linux solaris,386 solaris,sparc
+
 // POSIX library calls on systems which use the largefile interface.
 
 package syscall

libgo/go/syscall/libcall_posix_regfile.go

@@ -2,6 +2,10 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+// +build !linux
+// +build !solaris !386
+// +build !solaris !sparc
+
 // POSIX library calls on systems which do not use the largefile
 // interface.
 

libgo/go/syscall/libcall_posix_utimesnano.go

@@ -2,6 +2,8 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+// +build darwin dragonfly freebsd openbsd netbsd solaris
+
 // General POSIX version of UtimesNano.
 
 package syscall

libgo/go/syscall/libcall_uname.go

@@ -2,6 +2,10 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+// Build on all systems other than solaris/386.
+// 32-bit Solaris 2/x86 needs _nuname, handled in libcall_solaris_386.go.
+// +build !386 !solaris
+
 package syscall
 
 //sysnb	Uname(buf *Utsname) (err error)

libgo/go/syscall/libcall_waitpid.go

@@ -1,20 +0,0 @@
-// 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.
-
-// For systems with the waitpid library call.
-
-package syscall
-
-//sys	waitpid(pid Pid_t, status *_C_int, options int) (wpid Pid_t, err error)
-//waitpid(pid Pid_t, status *_C_int, options _C_int) Pid_t
-
-func Wait4(pid int, wstatus *WaitStatus, options int, rusage *Rusage) (wpid int, err error) {
-	var status _C_int
-	r, err := waitpid(Pid_t(pid), &status, options)
-	wpid = int(r)
-	if wstatus != nil {
-		*wstatus = WaitStatus(status)
-	}
-	return
-}

libgo/go/syscall/msan.go

@@ -1,22 +0,0 @@
-// Copyright 2015 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.
-
-// +build msan
-
-package syscall
-
-import (
-	"runtime"
-	"unsafe"
-)
-
-const msanenabled = true
-
-func msanRead(addr unsafe.Pointer, len int) {
-	runtime.MSanRead(addr, len)
-}
-
-func msanWrite(addr unsafe.Pointer, len int) {
-	runtime.MSanWrite(addr, len)
-}

libgo/go/syscall/sleep_rtems.go

@@ -4,6 +4,8 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+// +build rtems
+
 package syscall
 
 func Sleep(nsec int64) (err error) {

libgo/go/syscall/sleep_select.go

@@ -4,10 +4,12 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+// +build !rtems
+
 package syscall
 
 func Sleep(nsec int64) (err error) {
-	tv := NsecToTimeval(nsec);
+	tv := NsecToTimeval(nsec)
-	_, err = Select(0, nil, nil, nil, &tv);
+	_, err = Select(0, nil, nil, nil, &tv)
-	return err;
+	return err
 }

libgo/go/syscall/socket_bsd.go

@@ -4,6 +4,8 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+// +build darwin dragonfly freebsd openbsd netbsd
+
 package syscall
 
 const SizeofSockaddrInet4 = 16

libgo/go/syscall/socket_irix.go

@@ -4,6 +4,8 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+// +build irix
+
 package syscall
 
 const SizeofSockaddrInet4 = 16