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Editing: os2_aix.go

// 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.

// This file contains main runtime AIX syscalls.
// Pollset syscalls are in netpoll_aix.go.
// The implementation is based on Solaris and Windows.
// Each syscall is made by calling its libc symbol using asmcgocall and asmsyscall6
// assembly functions.

package runtime

import (
	"unsafe"
)

// Symbols imported for __start function.

//go:cgo_import_dynamic libc___n_pthreads __n_pthreads "libpthread.a/shr_xpg5_64.o"
//go:cgo_import_dynamic libc___mod_init __mod_init "libc.a/shr_64.o"
//go:linkname libc___n_pthreads libc___n_pthreads
//go:linkname libc___mod_init libc___mod_init

var (
	libc___n_pthreads,
	libc___mod_init libFunc
)

// Syscalls

//go:cgo_import_dynamic libc__Errno _Errno "libc.a/shr_64.o"
//go:cgo_import_dynamic libc_clock_gettime clock_gettime "libc.a/shr_64.o"
//go:cgo_import_dynamic libc_close close "libc.a/shr_64.o"
//go:cgo_import_dynamic libc_exit _exit "libc.a/shr_64.o"
//go:cgo_import_dynamic libc_getpid getpid "libc.a/shr_64.o"
//go:cgo_import_dynamic libc_getsystemcfg getsystemcfg "libc.a/shr_64.o"
//go:cgo_import_dynamic libc_kill kill "libc.a/shr_64.o"
//go:cgo_import_dynamic libc_madvise madvise "libc.a/shr_64.o"
//go:cgo_import_dynamic libc_malloc malloc "libc.a/shr_64.o"
//go:cgo_import_dynamic libc_mmap mmap "libc.a/shr_64.o"
//go:cgo_import_dynamic libc_mprotect mprotect "libc.a/shr_64.o"
//go:cgo_import_dynamic libc_munmap munmap "libc.a/shr_64.o"
//go:cgo_import_dynamic libc_open open "libc.a/shr_64.o"
//go:cgo_import_dynamic libc_pipe pipe "libc.a/shr_64.o"
//go:cgo_import_dynamic libc_raise raise "libc.a/shr_64.o"
//go:cgo_import_dynamic libc_read read "libc.a/shr_64.o"
//go:cgo_import_dynamic libc_sched_yield sched_yield "libc.a/shr_64.o"
//go:cgo_import_dynamic libc_sem_init sem_init "libc.a/shr_64.o"
//go:cgo_import_dynamic libc_sem_post sem_post "libc.a/shr_64.o"
//go:cgo_import_dynamic libc_sem_timedwait sem_timedwait "libc.a/shr_64.o"
//go:cgo_import_dynamic libc_sem_wait sem_wait "libc.a/shr_64.o"
//go:cgo_import_dynamic libc_setitimer setitimer "libc.a/shr_64.o"
//go:cgo_import_dynamic libc_sigaction sigaction "libc.a/shr_64.o"
//go:cgo_import_dynamic libc_sigaltstack sigaltstack "libc.a/shr_64.o"
//go:cgo_import_dynamic libc_sysconf sysconf "libc.a/shr_64.o"
//go:cgo_import_dynamic libc_usleep usleep "libc.a/shr_64.o"
//go:cgo_import_dynamic libc_write write "libc.a/shr_64.o"
//go:cgo_import_dynamic libc_getuid getuid "libc.a/shr_64.o"
//go:cgo_import_dynamic libc_geteuid geteuid "libc.a/shr_64.o"
//go:cgo_import_dynamic libc_getgid getgid "libc.a/shr_64.o"
//go:cgo_import_dynamic libc_getegid getegid "libc.a/shr_64.o"

//go:cgo_import_dynamic libpthread___pth_init __pth_init "libpthread.a/shr_xpg5_64.o"
//go:cgo_import_dynamic libpthread_attr_destroy pthread_attr_destroy "libpthread.a/shr_xpg5_64.o"
//go:cgo_import_dynamic libpthread_attr_init pthread_attr_init "libpthread.a/shr_xpg5_64.o"
//go:cgo_import_dynamic libpthread_attr_getstacksize pthread_attr_getstacksize "libpthread.a/shr_xpg5_64.o"
//go:cgo_import_dynamic libpthread_attr_setstacksize pthread_attr_setstacksize "libpthread.a/shr_xpg5_64.o"
//go:cgo_import_dynamic libpthread_attr_setdetachstate pthread_attr_setdetachstate "libpthread.a/shr_xpg5_64.o"
//go:cgo_import_dynamic libpthread_attr_setstackaddr pthread_attr_setstackaddr "libpthread.a/shr_xpg5_64.o"
//go:cgo_import_dynamic libpthread_create pthread_create "libpthread.a/shr_xpg5_64.o"
//go:cgo_import_dynamic libpthread_sigthreadmask sigthreadmask "libpthread.a/shr_xpg5_64.o"
//go:cgo_import_dynamic libpthread_self pthread_self "libpthread.a/shr_xpg5_64.o"
//go:cgo_import_dynamic libpthread_kill pthread_kill "libpthread.a/shr_xpg5_64.o"

//go:linkname libc__Errno libc__Errno
//go:linkname libc_clock_gettime libc_clock_gettime
//go:linkname libc_close libc_close
//go:linkname libc_exit libc_exit
//go:linkname libc_getpid libc_getpid
//go:linkname libc_getsystemcfg libc_getsystemcfg
//go:linkname libc_kill libc_kill
//go:linkname libc_madvise libc_madvise
//go:linkname libc_malloc libc_malloc
//go:linkname libc_mmap libc_mmap
//go:linkname libc_mprotect libc_mprotect
//go:linkname libc_munmap libc_munmap
//go:linkname libc_open libc_open
//go:linkname libc_pipe libc_pipe
//go:linkname libc_raise libc_raise
//go:linkname libc_read libc_read
//go:linkname libc_sched_yield libc_sched_yield
//go:linkname libc_sem_init libc_sem_init
//go:linkname libc_sem_post libc_sem_post
//go:linkname libc_sem_timedwait libc_sem_timedwait
//go:linkname libc_sem_wait libc_sem_wait
//go:linkname libc_setitimer libc_setitimer
//go:linkname libc_sigaction libc_sigaction
//go:linkname libc_sigaltstack libc_sigaltstack
//go:linkname libc_sysconf libc_sysconf
//go:linkname libc_usleep libc_usleep
//go:linkname libc_write libc_write
//go:linkname libc_getuid libc_getuid
//go:linkname libc_geteuid libc_geteuid
//go:linkname libc_getgid libc_getgid
//go:linkname libc_getegid libc_getegid

//go:linkname libpthread___pth_init libpthread___pth_init
//go:linkname libpthread_attr_destroy libpthread_attr_destroy
//go:linkname libpthread_attr_init libpthread_attr_init
//go:linkname libpthread_attr_getstacksize libpthread_attr_getstacksize
//go:linkname libpthread_attr_setstacksize libpthread_attr_setstacksize
//go:linkname libpthread_attr_setdetachstate libpthread_attr_setdetachstate
//go:linkname libpthread_attr_setstackaddr libpthread_attr_setstackaddr
//go:linkname libpthread_create libpthread_create
//go:linkname libpthread_sigthreadmask libpthread_sigthreadmask
//go:linkname libpthread_self libpthread_self
//go:linkname libpthread_kill libpthread_kill

var (
	//libc
	libc__Errno,
	libc_clock_gettime,
	libc_close,
	libc_exit,
	libc_getpid,
	libc_getsystemcfg,
	libc_kill,
	libc_madvise,
	libc_malloc,
	libc_mmap,
	libc_mprotect,
	libc_munmap,
	libc_open,
	libc_pipe,
	libc_raise,
	libc_read,
	libc_sched_yield,
	libc_sem_init,
	libc_sem_post,
	libc_sem_timedwait,
	libc_sem_wait,
	libc_setitimer,
	libc_sigaction,
	libc_sigaltstack,
	libc_sysconf,
	libc_usleep,
	libc_write,
	libc_getuid,
	libc_geteuid,
	libc_getgid,
	libc_getegid,
	//libpthread
	libpthread___pth_init,
	libpthread_attr_destroy,
	libpthread_attr_init,
	libpthread_attr_getstacksize,
	libpthread_attr_setstacksize,
	libpthread_attr_setdetachstate,
	libpthread_attr_setstackaddr,
	libpthread_create,
	libpthread_sigthreadmask,
	libpthread_self,
	libpthread_kill libFunc
)

type libFunc uintptr

// asmsyscall6 calls the libc symbol using a C convention.
// It's defined in sys_aix_ppc64.go.
var asmsyscall6 libFunc

// syscallX functions must always be called with g != nil and m != nil,
// as it relies on g.m.libcall to pass arguments to asmcgocall.
// The few cases where syscalls haven't a g or a m must call their equivalent
// function in sys_aix_ppc64.s to handle them.

//go:nowritebarrier
//go:nosplit
func syscall0(fn *libFunc) (r, err uintptr) {
	gp := getg()
	mp := gp.m
	resetLibcall := true
	if mp.libcallsp == 0 {
		mp.libcallg.set(gp)
		mp.libcallpc = getcallerpc()
		// sp must be the last, because once async cpu profiler finds
		// all three values to be non-zero, it will use them
		mp.libcallsp = getcallersp()
	} else {
		resetLibcall = false // See comment in sys_darwin.go:libcCall
	}

c := libcall{
		fn:   uintptr(unsafe.Pointer(fn)),
		n:    0,
		args: uintptr(unsafe.Pointer(&fn)), // it's unused but must be non-nil, otherwise crashes
	}

asmcgocall(unsafe.Pointer(&asmsyscall6), unsafe.Pointer(&c))