runtime: add AIX operating system

This commit adds AIX operating system to runtime package for ppc64
architecture.

Only new files and minor changes are in this commit. Others
modifications in files like asm_ppc64.s  will be in separate commits.

Updates: #25893

Change-Id: I9c5e073f5f3debb43b004ad1167694a5afd31cfd
Reviewed-on: https://go-review.googlesource.com/c/138716
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>

src/runtime/crash_unix_test.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 linux netbsd openbsd solaris
+// +build aix darwin dragonfly freebsd linux netbsd openbsd solaris
 
 package runtime_test
 

src/runtime/defs_aix.go

@@ -0,0 +1,170 @@
+// Copyright 2018 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 ignore
+
+/*
+Input to cgo -godefs
+GOARCH=ppc64 go tool cgo -godefs defs_aix.go > defs_aix_ppc64_tmp.go
+
+This is only an helper to create defs_aix_ppc64.go
+Go runtime functions require the "linux" name of fields (ss_sp, si_addr, etc)
+However, AIX structures don't provide such names and must be modified.
+
+TODO(aix): create a script to automatise defs_aix creation.
+
+Modifications made:
+ - sigset replaced by a [4]uint64 array
+ - add sigset_all variable
+ - siginfo.si_addr uintptr instead of *byte
+ - add (*timeval) set_usec
+ - stackt.ss_sp uintptr instead of *byte
+ - stackt.ss_size uintptr instead of uint64
+ - sigcontext.sc_jmpbuf context64 instead of jumbuf
+ - ucontext.__extctx is a uintptr because we don't need extctx struct
+ - ucontext.uc_mcontext: replace jumbuf structure by context64 structure
+ - sigaction.sa_handler represents union field as both are uintptr
+ - tstate.* replace *byte by uintptr
+
+
+*/
+
+package runtime
+
+/*
+
+#include <sys/types.h>
+#include <sys/errno.h>
+#include <sys/time.h>
+#include <sys/signal.h>
+#include <sys/mman.h>
+#include <sys/thread.h>
+#include <sys/resource.h>
+
+#include <unistd.h>
+#include <fcntl.h>
+#include <pthread.h>
+#include <semaphore.h>
+*/
+import "C"
+
+const (
+	_EPERM     = C.EPERM
+	_ENOENT    = C.ENOENT
+	_EINTR     = C.EINTR
+	_EAGAIN    = C.EAGAIN
+	_ENOMEM    = C.ENOMEM
+	_EACCES    = C.EACCES
+	_EFAULT    = C.EFAULT
+	_EINVAL    = C.EINVAL
+	_ETIMEDOUT = C.ETIMEDOUT
+
+	_PROT_NONE  = C.PROT_NONE
+	_PROT_READ  = C.PROT_READ
+	_PROT_WRITE = C.PROT_WRITE
+	_PROT_EXEC  = C.PROT_EXEC
+
+	_MAP_ANONYMOUS = C.MAP_ANONYMOUS
+	_MAP_PRIVATE   = C.MAP_PRIVATE
+	_MAP_FIXED     = C.MAP_FIXED
+	_MADV_DONTNEED = C.MADV_DONTNEED
+
+	_SIGHUP     = C.SIGHUP
+	_SIGINT     = C.SIGINT
+	_SIGQUIT    = C.SIGQUIT
+	_SIGILL     = C.SIGILL
+	_SIGTRAP    = C.SIGTRAP
+	_SIGABRT    = C.SIGABRT
+	_SIGBUS     = C.SIGBUS
+	_SIGFPE     = C.SIGFPE
+	_SIGKILL    = C.SIGKILL
+	_SIGUSR1    = C.SIGUSR1
+	_SIGSEGV    = C.SIGSEGV
+	_SIGUSR2    = C.SIGUSR2
+	_SIGPIPE    = C.SIGPIPE
+	_SIGALRM    = C.SIGALRM
+	_SIGCHLD    = C.SIGCHLD
+	_SIGCONT    = C.SIGCONT
+	_SIGSTOP    = C.SIGSTOP
+	_SIGTSTP    = C.SIGTSTP
+	_SIGTTIN    = C.SIGTTIN
+	_SIGTTOU    = C.SIGTTOU
+	_SIGURG     = C.SIGURG
+	_SIGXCPU    = C.SIGXCPU
+	_SIGXFSZ    = C.SIGXFSZ
+	_SIGVTALRM  = C.SIGVTALRM
+	_SIGPROF    = C.SIGPROF
+	_SIGWINCH   = C.SIGWINCH
+	_SIGIO      = C.SIGIO
+	_SIGPWR     = C.SIGPWR
+	_SIGSYS     = C.SIGSYS
+	_SIGTERM    = C.SIGTERM
+	_SIGEMT     = C.SIGEMT
+	_SIGWAITING = C.SIGWAITING
+
+	_FPE_INTDIV = C.FPE_INTDIV
+	_FPE_INTOVF = C.FPE_INTOVF
+	_FPE_FLTDIV = C.FPE_FLTDIV
+	_FPE_FLTOVF = C.FPE_FLTOVF
+	_FPE_FLTUND = C.FPE_FLTUND
+	_FPE_FLTRES = C.FPE_FLTRES
+	_FPE_FLTINV = C.FPE_FLTINV
+	_FPE_FLTSUB = C.FPE_FLTSUB
+
+	_BUS_ADRALN = C.BUS_ADRALN
+	_BUS_ADRERR = C.BUS_ADRERR
+	_BUS_OBJERR = C.BUS_OBJERR
+
+	_SEGV_MAPERR = C.SEGV_MAPERR
+	_SEGV_ACCERR = C.SEGV_ACCERR
+
+	_ITIMER_REAL    = C.ITIMER_REAL
+	_ITIMER_VIRTUAL = C.ITIMER_VIRTUAL
+	_ITIMER_PROF    = C.ITIMER_PROF
+
+	_O_RDONLY = C.O_RDONLY
+
+	_SS_DISABLE  = C.SS_DISABLE
+	_SI_USER     = C.SI_USER
+	_SIG_BLOCK   = C.SIG_BLOCK
+	_SIG_UNBLOCK = C.SIG_UNBLOCK
+	_SIG_SETMASK = C.SIG_SETMASK
+
+	_SA_SIGINFO = C.SA_SIGINFO
+	_SA_RESTART = C.SA_RESTART
+	_SA_ONSTACK = C.SA_ONSTACK
+
+	_PTHREAD_CREATE_DETACHED = C.PTHREAD_CREATE_DETACHED
+
+	__SC_PAGE_SIZE        = C._SC_PAGE_SIZE
+	__SC_NPROCESSORS_ONLN = C._SC_NPROCESSORS_ONLN
+
+	_F_SETFD    = C.F_SETFD
+	_F_SETFL    = C.F_SETFL
+	_F_GETFD    = C.F_GETFD
+	_F_GETFL    = C.F_GETFL
+	_FD_CLOEXEC = C.FD_CLOEXEC
+)
+
+type sigset C.sigset_t
+type siginfo C.siginfo_t
+type timespec C.struct_timespec
+type timestruc C.struct_timestruc_t
+type timeval C.struct_timeval
+type itimerval C.struct_itimerval
+
+type stackt C.stack_t
+type sigcontext C.struct_sigcontext
+type ucontext C.ucontext_t
+type _Ctype_struct___extctx uint64 // ucontext use a pointer to this structure but it shouldn't be used
+type jmpbuf C.struct___jmpbuf
+type context64 C.struct___context64
+type sigactiont C.struct_sigaction
+type tstate C.struct_tstate
+type rusage C.struct_rusage
+
+type pthread C.pthread_t
+type pthread_attr C.pthread_attr_t
+
+type semt C.sem_t

src/runtime/defs_aix_ppc64.go

@@ -0,0 +1,203 @@
+// Copyright 2018 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 aix
+
+package runtime
+
+const (
+	_EPERM     = 0x1
+	_ENOENT    = 0x2
+	_EINTR     = 0x4
+	_EAGAIN    = 0xb
+	_ENOMEM    = 0xc
+	_EACCES    = 0xd
+	_EFAULT    = 0xe
+	_EINVAL    = 0x16
+	_ETIMEDOUT = 0x4e
+
+	_PROT_NONE  = 0x0
+	_PROT_READ  = 0x1
+	_PROT_WRITE = 0x2
+	_PROT_EXEC  = 0x4
+
+	_MAP_ANONYMOUS = 0x10
+	_MAP_PRIVATE   = 0x2
+	_MAP_FIXED     = 0x100
+	_MADV_DONTNEED = 0x4
+
+	_SIGHUP     = 0x1
+	_SIGINT     = 0x2
+	_SIGQUIT    = 0x3
+	_SIGILL     = 0x4
+	_SIGTRAP    = 0x5
+	_SIGABRT    = 0x6
+	_SIGBUS     = 0xa
+	_SIGFPE     = 0x8
+	_SIGKILL    = 0x9
+	_SIGUSR1    = 0x1e
+	_SIGSEGV    = 0xb
+	_SIGUSR2    = 0x1f
+	_SIGPIPE    = 0xd
+	_SIGALRM    = 0xe
+	_SIGCHLD    = 0x14
+	_SIGCONT    = 0x13
+	_SIGSTOP    = 0x11
+	_SIGTSTP    = 0x12
+	_SIGTTIN    = 0x15
+	_SIGTTOU    = 0x16
+	_SIGURG     = 0x10
+	_SIGXCPU    = 0x18
+	_SIGXFSZ    = 0x19
+	_SIGVTALRM  = 0x22
+	_SIGPROF    = 0x20
+	_SIGWINCH   = 0x1c
+	_SIGIO      = 0x17
+	_SIGPWR     = 0x1d
+	_SIGSYS     = 0xc
+	_SIGTERM    = 0xf
+	_SIGEMT     = 0x7
+	_SIGWAITING = 0x27
+
+	_FPE_INTDIV = 0x14
+	_FPE_INTOVF = 0x15
+	_FPE_FLTDIV = 0x16
+	_FPE_FLTOVF = 0x17
+	_FPE_FLTUND = 0x18
+	_FPE_FLTRES = 0x19
+	_FPE_FLTINV = 0x1a
+	_FPE_FLTSUB = 0x1b
+
+	_BUS_ADRALN = 0x1
+	_BUS_ADRERR = 0x2
+	_BUS_OBJERR = 0x3
+	_
+	_SEGV_MAPERR = 0x32
+	_SEGV_ACCERR = 0x33
+
+	_ITIMER_REAL    = 0x0
+	_ITIMER_VIRTUAL = 0x1
+	_ITIMER_PROF    = 0x2
+
+	_O_RDONLY = 0x0
+
+	_SS_DISABLE  = 0x2
+	_SI_USER     = 0x0
+	_SIG_BLOCK   = 0x0
+	_SIG_UNBLOCK = 0x1
+	_SIG_SETMASK = 0x2
+
+	_SA_SIGINFO = 0x100
+	_SA_RESTART = 0x8
+	_SA_ONSTACK = 0x1
+
+	_PTHREAD_CREATE_DETACHED = 0x1
+
+	__SC_PAGE_SIZE        = 0x30
+	__SC_NPROCESSORS_ONLN = 0x48
+
+	_F_SETFD    = 0x2
+	_F_SETFL    = 0x4
+	_F_GETFD    = 0x1
+	_F_GETFL    = 0x3
+	_FD_CLOEXEC = 0x1
+)
+
+type sigset [4]uint64
+
+var sigset_all = sigset{^uint64(0), ^uint64(0), ^uint64(0), ^uint64(0)}
+
+type siginfo struct {
+	si_signo   int32
+	si_errno   int32
+	si_code    int32
+	si_pid     int32
+	si_uid     uint32
+	si_status  int32
+	si_addr    uintptr
+	si_band    int64
+	si_value   [2]int32 // [8]byte
+	__si_flags int32
+	__pad      [3]int32
+}
+
+type timespec struct {
+	tv_sec  int64
+	tv_nsec int64
+}
+type timeval struct {
+	tv_sec    int64
+	tv_usec   int32
+	pad_cgo_0 [4]byte
+}
+
+func (tv *timeval) set_usec(x int32) {
+	tv.tv_usec = x
+}
+
+type itimerval struct {
+	it_interval timeval
+	it_value    timeval
+}
+
+type stackt struct {
+	ss_sp     uintptr
+	ss_size   uintptr
+	ss_flags  int32
+	__pad     [4]int32
+	pas_cgo_0 [4]byte
+}
+
+type sigcontext struct {
+	sc_onstack int32
+	pad_cgo_0  [4]byte
+	sc_mask    sigset
+	sc_uerror  int32
+	sc_jmpbuf  context64
+}
+
+type ucontext struct {
+	__sc_onstack   int32
+	pad_cgo_0      [4]byte
+	uc_sigmask     sigset
+	__sc_error     int32
+	pad_cgo_1      [4]byte
+	uc_mcontext    context64
+	uc_link        *ucontext
+	uc_stack       stackt
+	__extctx       uintptr // pointer to struct __extctx but we don't use it
+	__extctx_magic int32
+	__pad          int32
+}
+
+type context64 struct {
+	gpr        [32]uint64
+	msr        uint64
+	iar        uint64
+	lr         uint64
+	ctr        uint64
+	cr         uint32
+	xer        uint32
+	fpscr      uint32
+	fpscrx     uint32
+	except     [1]uint64
+	fpr        [32]float64
+	fpeu       uint8
+	fpinfo     uint8
+	fpscr24_31 uint8
+	pad        [1]uint8
+	excp_type  int32
+}
+
+type sigactiont struct {
+	sa_handler uintptr // a union of two pointer
+	sa_mask    sigset
+	sa_flags   int32
+	pad_cgo_0  [4]byte
+}
+
+type pthread uint32
+type pthread_attr *byte
+
+type semt int32

src/runtime/env_posix.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 js,wasm linux nacl netbsd openbsd solaris windows
+// +build aix darwin dragonfly freebsd js,wasm linux nacl netbsd openbsd solaris windows
 
 package runtime