| // 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. |
| |
| // GNU/Linux library calls. |
| |
| package syscall |
| |
| import ( |
| "unsafe" |
| ) |
| |
| //sys ptrace(request int, pid int, addr uintptr, data uintptr) (err Errno) |
| //__go_ptrace(request _C_int, pid Pid_t, addr *byte, data *byte) _C_long |
| |
| //sysnb raw_ptrace(request int, pid int, addr uintptr, data uintptr) (err Errno) |
| //__go_ptrace(request _C_int, pid Pid_t, addr *byte, data *byte) _C_long |
| |
| func ptracePeek(req int, pid int, addr uintptr, out []byte) (count int, err error) { |
| // The peek requests are machine-size oriented, so we wrap it |
| // to retrieve arbitrary-length data. |
| |
| // The ptrace syscall differs from glibc's ptrace. |
| // Peeks returns the word in *data, not as the return value. |
| |
| var buf [sizeofPtr]byte |
| |
| // Leading edge. PEEKTEXT/PEEKDATA don't require aligned |
| // access (PEEKUSER warns that it might), but if we don't |
| // align our reads, we might straddle an unmapped page |
| // boundary and not get the bytes leading up to the page |
| // boundary. |
| n := 0 |
| if addr%sizeofPtr != 0 { |
| err = ptrace(req, pid, addr-addr%sizeofPtr, uintptr(unsafe.Pointer(&buf[0]))) |
| if err != nil { |
| return 0, err |
| } |
| n += copy(out, buf[addr%sizeofPtr:]) |
| out = out[n:] |
| } |
| |
| // Remainder. |
| for len(out) > 0 { |
| // We use an internal buffer to gaurantee alignment. |
| // It's not documented if this is necessary, but we're paranoid. |
| err = ptrace(req, pid, addr+uintptr(n), uintptr(unsafe.Pointer(&buf[0]))) |
| if err != nil { |
| return n, err |
| } |
| copied := copy(out, buf[0:]) |
| n += copied |
| out = out[copied:] |
| } |
| |
| return n, nil |
| } |
| |
| func PtracePeekText(pid int, addr uintptr, out []byte) (count int, err error) { |
| return ptracePeek(PTRACE_PEEKTEXT, pid, addr, out) |
| } |
| |
| func PtracePeekData(pid int, addr uintptr, out []byte) (count int, err error) { |
| return ptracePeek(PTRACE_PEEKDATA, pid, addr, out) |
| } |
| |
| func ptracePoke(pokeReq int, peekReq int, pid int, addr uintptr, data []byte) (count int, err error) { |
| // As for ptracePeek, we need to align our accesses to deal |
| // with the possibility of straddling an invalid page. |
| |
| // Leading edge. |
| n := 0 |
| if addr%sizeofPtr != 0 { |
| var buf [sizeofPtr]byte |
| err = ptrace(peekReq, pid, addr-addr%sizeofPtr, uintptr(unsafe.Pointer(&buf[0]))) |
| if err != nil { |
| return 0, err |
| } |
| n += copy(buf[addr%sizeofPtr:], data) |
| word := *((*uintptr)(unsafe.Pointer(&buf[0]))) |
| err = ptrace(pokeReq, pid, addr-addr%sizeofPtr, word) |
| if err != nil { |
| return 0, err |
| } |
| data = data[n:] |
| } |
| |
| // Interior. |
| for len(data) > int(sizeofPtr) { |
| word := *((*uintptr)(unsafe.Pointer(&data[0]))) |
| err = ptrace(pokeReq, pid, addr+uintptr(n), word) |
| if err != nil { |
| return n, err |
| } |
| n += int(sizeofPtr) |
| data = data[sizeofPtr:] |
| } |
| |
| // Trailing edge. |
| if len(data) > 0 { |
| var buf [sizeofPtr]byte |
| err = ptrace(peekReq, pid, addr+uintptr(n), uintptr(unsafe.Pointer(&buf[0]))) |
| if err != nil { |
| return n, err |
| } |
| copy(buf[0:], data) |
| word := *((*uintptr)(unsafe.Pointer(&buf[0]))) |
| err = ptrace(pokeReq, pid, addr+uintptr(n), word) |
| if err != nil { |
| return n, err |
| } |
| n += len(data) |
| } |
| |
| return n, nil |
| } |
| |
| func PtracePokeText(pid int, addr uintptr, data []byte) (count int, err error) { |
| return ptracePoke(PTRACE_POKETEXT, PTRACE_PEEKTEXT, pid, addr, data) |
| } |
| |
| func PtracePokeData(pid int, addr uintptr, data []byte) (count int, err error) { |
| return ptracePoke(PTRACE_POKEDATA, PTRACE_PEEKDATA, pid, addr, data) |
| } |
| |
| func PtraceSetOptions(pid int, options int) (err error) { |
| return ptrace(PTRACE_SETOPTIONS, pid, 0, uintptr(options)) |
| } |
| |
| func PtraceGetEventMsg(pid int) (msg uint, err error) { |
| var data _C_long |
| err = ptrace(PTRACE_GETEVENTMSG, pid, 0, uintptr(unsafe.Pointer(&data))) |
| msg = uint(data) |
| return |
| } |
| |
| func PtraceCont(pid int, signal int) (err error) { |
| return ptrace(PTRACE_CONT, pid, 0, uintptr(signal)) |
| } |
| |
| func PtraceSingleStep(pid int) (err error) { return ptrace(PTRACE_SINGLESTEP, pid, 0, 0) } |
| |
| func PtraceAttach(pid int) (err error) { return ptrace(PTRACE_ATTACH, pid, 0, 0) } |
| |
| func PtraceDetach(pid int) (err error) { return ptrace(PTRACE_DETACH, pid, 0, 0) } |
| |
| //sys reboot(magic1 uint, magic2 uint, cmd int, arg string) (err error) |
| //reboot(magic1 _C_uint, magic2 _C_uint, cmd _C_int, arg *byte) _C_int |
| |
| func Reboot(cmd int) (err error) { |
| return reboot(LINUX_REBOOT_MAGIC1, LINUX_REBOOT_MAGIC2, cmd, "") |
| } |
| |
| //sys Acct(path string) (err error) |
| //acct(path *byte) _C_int |
| |
| //sys Adjtimex(buf *Timex) (state int, err error) |
| //adjtimex(buf *Timex) _C_int |
| |
| //sys Fstatfs(fd int, buf *Statfs_t) (err error) |
| //fstatfs64(fd _C_int, buf *Statfs_t) _C_int |
| |
| func Gettid() (tid int) { |
| r1, _, _ := Syscall(SYS_GETTID, 0, 0, 0) |
| return int(r1) |
| } |
| |
| //sys Getxattr(path string, attr string, dest []byte) (sz int, err error) |
| //getxattr(path *byte, attr *byte, buf *byte, count Size_t) Ssize_t |
| |
| //sys InotifyAddWatch(fd int, pathname string, mask uint32) (watchdesc int, err error) |
| //inotify_add_watch(fd _C_int, pathname *byte, mask uint32) _C_int |
| |
| //sysnb InotifyInit() (fd int, err error) |
| //inotify_init() _C_int |
| |
| //sysnb InotifyInit1(flags int) (fd int, err error) |
| //inotify_init1(flags _C_int) _C_int |
| |
| //sysnb InotifyRmWatch(fd int, watchdesc uint32) (success int, err error) |
| //inotify_rm_watch(fd _C_int, wd uint32) _C_int |
| |
| //sys Klogctl(typ int, buf []byte) (n int, err error) |
| //klogctl(typ _C_int, bufp *byte, len _C_int) _C_int |
| |
| //sys Listxattr(path string, dest []byte) (sz int, err error) |
| //listxattr(path *byte, list *byte, size Size_t) Ssize_t |
| |
| //sys PivotRoot(newroot string, putold string) (err error) |
| //pivot_root(newroot *byte, putold *byte) _C_int |
| |
| //sys Removexattr(path string, attr string) (err error) |
| //removexattr(path *byte, name *byte) _C_int |
| |
| //sys Renameat(olddirfd int, oldpath string, newdirfd int, newpath string) (err error) |
| //renameat(olddirfd _C_int, oldpath *byte, newdirfd _C_int, newpath *byte) _C_int |
| |
| //sys Setfsgid(gid int) (err error) |
| //setfsgid(gid Gid_t) _C_int |
| |
| //sys Setfsuid(uid int) (err error) |
| //setfsuid(uid Uid_t) _C_int |
| |
| //sysnb Setresgid(rgid int, egid int, sgid int) (err error) |
| //setresgid(rgid Gid_t, egid Gid_t, sgid Gid_t) _C_int |
| |
| //sysnb Setresuid(ruid int, eguid int, suid int) (err error) |
| //setresuid(ruid Uid_t, euid Uid_t, suid Uid_t) _C_int |
| |
| //sys Setxattr(path string, attr string, data []byte, flags int) (err error) |
| //setxattr(path *byte, name *byte, value *byte, size Size_t, flags _C_int) _C_int |
| |
| //sys splice(rfd int, roff *_libgo_loff_t_type, wfd int, woff *_libgo_loff_t_type, len int, flags int) (n int64, err error) |
| //splice(rfd _C_int, roff *_libgo_loff_t_type, wfd _C_int, woff *_libgo_loff_t_type, len Size_t, flags _C_uint) Ssize_t |
| |
| func Splice(rfd int, roff *int64, wfd int, woff *int64, len int, flags int) (n int64, err error) { |
| var lroff _libgo_loff_t_type |
| var plroff *_libgo_loff_t_type |
| if roff != nil { |
| lroff = _libgo_loff_t_type(*roff) |
| plroff = &lroff |
| } |
| var lwoff _libgo_loff_t_type |
| var plwoff *_libgo_loff_t_type |
| if woff != nil { |
| lwoff = _libgo_loff_t_type(*woff) |
| plwoff = &lwoff |
| } |
| n, err = splice(rfd, plroff, wfd, plwoff, len, flags) |
| if roff != nil { |
| *roff = int64(lroff) |
| } |
| if woff != nil { |
| *woff = int64(lwoff) |
| } |
| return |
| } |
| |
| //sys Statfs(path string, buf *Statfs_t) (err error) |
| //statfs64(path *byte, buf *Statfs_t) _C_int |
| |
| //sysnb Sysinfo(info *Sysinfo_t) (err error) |
| //sysinfo(info *Sysinfo_t) _C_int |
| |
| //sys Tee(rfd int, wfd int, len int, flags int) (n int64, err error) |
| //tee(rfd _C_int, wfd _C_int, len Size_t, flags _C_uint) Ssize_t |
| |
| func Tgkill(tgid int, tid int, sig Signal) error { |
| r1, _, errno := Syscall(SYS_TGKILL, uintptr(tgid), uintptr(tid), uintptr(sig)) |
| if r1 < 0 { |
| return errno |
| } |
| return nil |
| } |
| |
| //sys unlinkat(dirfd int, path string, flags int) (err error) |
| //unlinkat(dirfd _C_int, path *byte, flags _C_int) _C_int |
| |
| func Unlinkat(dirfd int, path string) (err error) { |
| return unlinkat(dirfd, path, 0) |
| } |
| |
| //sys Unmount(target string, flags int) (err error) = SYS_UMOUNT2 |
| //umount2(target *byte, flags _C_int) _C_int |
| |
| //sys Unshare(flags int) (err error) |
| //unshare(flags _C_int) _C_int |