blob: 440421d94cc702f690c5bac6e07774aa7c61201b [file] [log] [blame]
// 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 (
libc_chdir,
libc_chroot,
libc_dlopen,
libc_dlclose,
libc_dlsym,
libc_execve,
libc_fcntl,
libc_forkx,
libc_gethostname,
libc_getpid,
libc_ioctl,
libc_pipe,
libc_setgid,
libc_setgroups,
libc_setsid,
libc_setuid,
libc_setpgid,
libc_syscall,
libc_wait4,
pipe1 libcFunc
)
//go:nosplit
func syscall_sysvicall6(fn, nargs, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2, err uintptr) {
call := libcall{
fn: fn,
n: nargs,
args: uintptr(unsafe.Pointer(&a1)),
}
entersyscallblock(0)
asmcgocall(unsafe.Pointer(&asmsysvicall6), unsafe.Pointer(&call))
exitsyscall(0)
return call.r1, call.r2, call.err
}
//go:nosplit
func syscall_rawsysvicall6(fn, nargs, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2, err uintptr) {
call := libcall{
fn: fn,
n: nargs,
args: uintptr(unsafe.Pointer(&a1)),
}
asmcgocall(unsafe.Pointer(&asmsysvicall6), unsafe.Pointer(&call))
return call.r1, call.r2, call.err
}
// TODO(aram): Once we remove all instances of C calling sysvicallN, make
// sysvicallN return errors and replace the body of the following functions
// with calls to sysvicallN.
//go:nosplit
func syscall_chdir(path uintptr) (err uintptr) {
call := libcall{
fn: uintptr(unsafe.Pointer(libc_chdir)),
n: 1,
args: uintptr(unsafe.Pointer(&path)),
}
asmcgocall(unsafe.Pointer(&asmsysvicall6), unsafe.Pointer(&call))
return call.err
}
//go:nosplit
func syscall_chroot(path uintptr) (err uintptr) {
call := libcall{
fn: uintptr(unsafe.Pointer(libc_chroot)),
n: 1,
args: uintptr(unsafe.Pointer(&path)),
}
asmcgocall(unsafe.Pointer(&asmsysvicall6), unsafe.Pointer(&call))
return call.err
}
// like close, but must not split stack, for forkx.
//go:nosplit
func syscall_close(fd int32) int32 {
return int32(sysvicall1(libc_close, uintptr(fd)))
}
func syscall_dlopen(name *byte, mode uintptr) (handle uintptr, err uintptr) {
call := libcall{
fn: uintptr(unsafe.Pointer(libc_dlopen)),
n: 2,
args: uintptr(unsafe.Pointer(&name)),
}
entersyscallblock(0)
asmcgocall(unsafe.Pointer(&asmsysvicall6), unsafe.Pointer(&call))
exitsyscall(0)
if call.r1 == 0 {
return call.r1, call.err
}
return call.r1, 0
}
func syscall_dlclose(handle uintptr) (err uintptr) {
call := libcall{
fn: uintptr(unsafe.Pointer(libc_dlclose)),
n: 1,
args: uintptr(unsafe.Pointer(&handle)),
}
entersyscallblock(0)
asmcgocall(unsafe.Pointer(&asmsysvicall6), unsafe.Pointer(&call))
exitsyscall(0)
return call.r1
}
func syscall_dlsym(handle uintptr, name *byte) (proc uintptr, err uintptr) {
call := libcall{
fn: uintptr(unsafe.Pointer(libc_dlsym)),
n: 2,
args: uintptr(unsafe.Pointer(&handle)),
}
entersyscallblock(0)
asmcgocall(unsafe.Pointer(&asmsysvicall6), unsafe.Pointer(&call))
exitsyscall(0)
if call.r1 == 0 {
return call.r1, call.err
}
return call.r1, 0
}
//go:nosplit
func syscall_execve(path, argv, envp uintptr) (err uintptr) {
call := libcall{
fn: uintptr(unsafe.Pointer(libc_execve)),
n: 3,
args: uintptr(unsafe.Pointer(&path)),
}
asmcgocall(unsafe.Pointer(&asmsysvicall6), unsafe.Pointer(&call))
return call.err
}
// like exit, but must not split stack, for forkx.
//go:nosplit
func syscall_exit(code uintptr) {
sysvicall1(libc_exit, code)
}
//go:nosplit
func syscall_fcntl(fd, cmd, arg uintptr) (val, err uintptr) {
call := libcall{
fn: uintptr(unsafe.Pointer(libc_fcntl)),
n: 3,
args: uintptr(unsafe.Pointer(&fd)),
}
asmcgocall(unsafe.Pointer(&asmsysvicall6), unsafe.Pointer(&call))
return call.r1, call.err
}
//go:nosplit
func syscall_forkx(flags uintptr) (pid uintptr, err uintptr) {
call := libcall{
fn: uintptr(unsafe.Pointer(libc_forkx)),
n: 1,
args: uintptr(unsafe.Pointer(&flags)),
}
asmcgocall(unsafe.Pointer(&asmsysvicall6), unsafe.Pointer(&call))
return call.r1, call.err
}
func syscall_gethostname() (name string, err uintptr) {
cname := new([_MAXHOSTNAMELEN]byte)
var args = [2]uintptr{uintptr(unsafe.Pointer(&cname[0])), _MAXHOSTNAMELEN}
call := libcall{
fn: uintptr(unsafe.Pointer(libc_gethostname)),
n: 2,
args: uintptr(unsafe.Pointer(&args[0])),
}
entersyscallblock(0)
asmcgocall(unsafe.Pointer(&asmsysvicall6), unsafe.Pointer(&call))
exitsyscall(0)
if call.r1 != 0 {
return "", call.err
}
cname[_MAXHOSTNAMELEN-1] = 0
return gostringnocopy(&cname[0]), 0
}
//go:nosplit
func syscall_getpid() (pid, err uintptr) {
call := libcall{
fn: uintptr(unsafe.Pointer(libc_getpid)),
n: 0,
args: uintptr(unsafe.Pointer(libc_getpid)), // it's unused but must be non-nil, otherwise crashes
}
asmcgocall(unsafe.Pointer(&asmsysvicall6), unsafe.Pointer(&call))
return call.r1, call.err
}
//go:nosplit
func syscall_ioctl(fd, req, arg uintptr) (err uintptr) {
call := libcall{
fn: uintptr(unsafe.Pointer(libc_ioctl)),
n: 3,
args: uintptr(unsafe.Pointer(&fd)),
}
asmcgocall(unsafe.Pointer(&asmsysvicall6), unsafe.Pointer(&call))
return call.err
}
func syscall_pipe() (r, w, err uintptr) {
call := libcall{
fn: uintptr(unsafe.Pointer(&pipe1)),
n: 0,
args: uintptr(unsafe.Pointer(&pipe1)), // it's unused but must be non-nil, otherwise crashes
}
entersyscallblock(0)
asmcgocall(unsafe.Pointer(&asmsysvicall6), unsafe.Pointer(&call))
exitsyscall(0)
return call.r1, call.r2, call.err
}
// This is syscall.RawSyscall, it exists to satisfy some build dependency,
// but it doesn't work correctly.
//
// DO NOT USE!
//
// TODO(aram): make this panic once we stop calling fcntl(2) in net using it.
func syscall_rawsyscall(trap, a1, a2, a3 uintptr) (r1, r2, err uintptr) {
call := libcall{
fn: uintptr(unsafe.Pointer(libc_syscall)),
n: 4,
args: uintptr(unsafe.Pointer(&trap)),
}
asmcgocall(unsafe.Pointer(&asmsysvicall6), unsafe.Pointer(&call))
return call.r1, call.r2, call.err
}
//go:nosplit
func syscall_setgid(gid uintptr) (err uintptr) {
call := libcall{
fn: uintptr(unsafe.Pointer(libc_setgid)),
n: 1,
args: uintptr(unsafe.Pointer(&gid)),
}
asmcgocall(unsafe.Pointer(&asmsysvicall6), unsafe.Pointer(&call))
return call.err
}
//go:nosplit
func syscall_setgroups(ngid, gid uintptr) (err uintptr) {
call := libcall{
fn: uintptr(unsafe.Pointer(libc_setgroups)),
n: 2,
args: uintptr(unsafe.Pointer(&ngid)),
}
asmcgocall(unsafe.Pointer(&asmsysvicall6), unsafe.Pointer(&call))
return call.err
}
//go:nosplit
func syscall_setsid() (pid, err uintptr) {
call := libcall{
fn: uintptr(unsafe.Pointer(libc_setsid)),
n: 0,
args: uintptr(unsafe.Pointer(libc_setsid)), // it's unused but must be non-nil, otherwise crashes
}
asmcgocall(unsafe.Pointer(&asmsysvicall6), unsafe.Pointer(&call))
return call.r1, call.err
}
//go:nosplit
func syscall_setuid(uid uintptr) (err uintptr) {
call := libcall{
fn: uintptr(unsafe.Pointer(libc_setuid)),
n: 1,
args: uintptr(unsafe.Pointer(&uid)),
}
asmcgocall(unsafe.Pointer(&asmsysvicall6), unsafe.Pointer(&call))
return call.err
}
//go:nosplit
func syscall_setpgid(pid, pgid uintptr) (err uintptr) {
call := libcall{
fn: uintptr(unsafe.Pointer(libc_setpgid)),
n: 2,
args: uintptr(unsafe.Pointer(&pid)),
}
asmcgocall(unsafe.Pointer(&asmsysvicall6), unsafe.Pointer(&call))
return call.err
}
// This is syscall.Syscall, it exists to satisfy some build dependency,
// but it doesn't work correctly.
//
// DO NOT USE!
//
// TODO(aram): make this panic once we stop calling fcntl(2) in net using it.
func syscall_syscall(trap, a1, a2, a3 uintptr) (r1, r2, err uintptr) {
call := libcall{
fn: uintptr(unsafe.Pointer(libc_syscall)),
n: 4,
args: uintptr(unsafe.Pointer(&trap)),
}
entersyscallblock(0)
asmcgocall(unsafe.Pointer(&asmsysvicall6), unsafe.Pointer(&call))
exitsyscall(0)
return call.r1, call.r2, call.err
}
func syscall_wait4(pid uintptr, wstatus *uint32, options uintptr, rusage unsafe.Pointer) (wpid int, err uintptr) {
call := libcall{
fn: uintptr(unsafe.Pointer(libc_wait4)),
n: 4,
args: uintptr(unsafe.Pointer(&pid)),
}
entersyscallblock(0)
asmcgocall(unsafe.Pointer(&asmsysvicall6), unsafe.Pointer(&call))
exitsyscall(0)
return int(call.r1), call.err
}
//go:nosplit
func syscall_write(fd, buf, nbyte uintptr) (n, err uintptr) {
call := libcall{
fn: uintptr(unsafe.Pointer(libc_write)),
n: 3,
args: uintptr(unsafe.Pointer(&fd)),
}
asmcgocall(unsafe.Pointer(&asmsysvicall6), unsafe.Pointer(&call))
return call.r1, call.err
}