From f5c4671bfbad96bf346bd7e9a21fc4317b4959df Mon Sep 17 00:00:00 2001
From: Indrajith K L
Date: Sat, 3 Dec 2022 17:00:20 +0530
Subject: Adds most of the tools

---
 .../v/old/vlib/builtin/linux_bare/libc_impl.v      | 157 +++++
 .../v/old/vlib/builtin/linux_bare/linux_syscalls.v | 433 ++++++++++++
 .../old/vlib/builtin/linux_bare/memory_managment.v |  29 +
 .../vlib/builtin/linux_bare/old/.checks/.gitignore |   5 +
 .../vlib/builtin/linux_bare/old/.checks/checks.v   |  32 +
 .../builtin/linux_bare/old/.checks/consts/consts.v |  22 +
 .../linux_bare/old/.checks/forkedtest/forkedtest.v |  49 ++
 .../linux_bare/old/.checks/linuxsys/linuxsys.v     | 300 ++++++++
 .../vlib/builtin/linux_bare/old/.checks/readme.md  |   5 +
 .../linux_bare/old/.checks/sample_text1.txt        |   1 +
 .../builtin/linux_bare/old/.checks/string/string.v |  63 ++
 .../linux_bare/old/.checks/structs/structs.v       |  42 ++
 .../v/old/vlib/builtin/linux_bare/old/array_bare.v |  53 ++
 .../old/vlib/builtin/linux_bare/old/builtin_bare.v |  60 ++
 .../vlib/builtin/linux_bare/old/linuxsys_bare.v    | 759 +++++++++++++++++++++
 .../v/old/vlib/builtin/linux_bare/old/mm_bare.v    |  58 ++
 .../old/vlib/builtin/linux_bare/old/string_bare.v  | 150 ++++
 .../builtin/linux_bare/old/syscallwrapper_test.v   |  27 +
 18 files changed, 2245 insertions(+)
 create mode 100644 v_windows/v/old/vlib/builtin/linux_bare/libc_impl.v
 create mode 100644 v_windows/v/old/vlib/builtin/linux_bare/linux_syscalls.v
 create mode 100644 v_windows/v/old/vlib/builtin/linux_bare/memory_managment.v
 create mode 100644 v_windows/v/old/vlib/builtin/linux_bare/old/.checks/.gitignore
 create mode 100644 v_windows/v/old/vlib/builtin/linux_bare/old/.checks/checks.v
 create mode 100644 v_windows/v/old/vlib/builtin/linux_bare/old/.checks/consts/consts.v
 create mode 100644 v_windows/v/old/vlib/builtin/linux_bare/old/.checks/forkedtest/forkedtest.v
 create mode 100644 v_windows/v/old/vlib/builtin/linux_bare/old/.checks/linuxsys/linuxsys.v
 create mode 100644 v_windows/v/old/vlib/builtin/linux_bare/old/.checks/readme.md
 create mode 100644 v_windows/v/old/vlib/builtin/linux_bare/old/.checks/sample_text1.txt
 create mode 100644 v_windows/v/old/vlib/builtin/linux_bare/old/.checks/string/string.v
 create mode 100644 v_windows/v/old/vlib/builtin/linux_bare/old/.checks/structs/structs.v
 create mode 100644 v_windows/v/old/vlib/builtin/linux_bare/old/array_bare.v
 create mode 100644 v_windows/v/old/vlib/builtin/linux_bare/old/builtin_bare.v
 create mode 100644 v_windows/v/old/vlib/builtin/linux_bare/old/linuxsys_bare.v
 create mode 100644 v_windows/v/old/vlib/builtin/linux_bare/old/mm_bare.v
 create mode 100644 v_windows/v/old/vlib/builtin/linux_bare/old/string_bare.v
 create mode 100644 v_windows/v/old/vlib/builtin/linux_bare/old/syscallwrapper_test.v

(limited to 'v_windows/v/old/vlib/builtin/linux_bare')

diff --git a/v_windows/v/old/vlib/builtin/linux_bare/libc_impl.v b/v_windows/v/old/vlib/builtin/linux_bare/libc_impl.v
new file mode 100644
index 0000000..735cac6
--- /dev/null
+++ b/v_windows/v/old/vlib/builtin/linux_bare/libc_impl.v
@@ -0,0 +1,157 @@
+module builtin
+
+[unsafe]
+pub fn memcpy(dest &C.void, src &C.void, n size_t) &C.void {
+	dest_ := unsafe { &byte(dest) }
+	src_ := unsafe { &byte(src) }
+	unsafe {
+		for i in 0 .. int(n) {
+			dest_[i] = src_[i]
+		}
+	}
+	return unsafe { dest }
+}
+
+[export: 'malloc']
+[unsafe]
+fn __malloc(n size_t) &C.void {
+	return unsafe { malloc(int(n)) }
+}
+
+[unsafe]
+fn strlen(_s &C.void) size_t {
+	s := unsafe { &byte(_s) }
+	mut i := 0
+	for ; unsafe { s[i] } != 0; i++ {}
+	return size_t(i)
+}
+
+[unsafe]
+fn realloc(old_area &C.void, new_size size_t) &C.void {
+	if old_area == 0 {
+		return unsafe { malloc(int(new_size)) }
+	}
+	if new_size == size_t(0) {
+		unsafe { free(old_area) }
+		return 0
+	}
+	old_size := unsafe { *(&u64(old_area - sizeof(u64))) }
+	if u64(new_size) <= old_size {
+		return unsafe { old_area }
+	} else {
+		new_area := unsafe { malloc(int(new_size)) }
+		unsafe { memmove(new_area, old_area, size_t(old_size)) }
+		unsafe { free(old_area) }
+		return new_area
+	}
+}
+
+[unsafe]
+fn memset(s &C.void, c int, n size_t) &C.void {
+	mut s_ := unsafe { &char(s) }
+	for i in 0 .. int(n) {
+		unsafe {
+			s_[i] = char(c)
+		}
+	}
+	return unsafe { s }
+}
+
+[unsafe]
+fn memmove(dest &C.void, src &C.void, n size_t) &C.void {
+	dest_ := unsafe { &byte(dest) }
+	src_ := unsafe { &byte(src) }
+	mut temp_buf := unsafe { malloc(int(n)) }
+	for i in 0 .. int(n) {
+		unsafe {
+			temp_buf[i] = src_[i]
+		}
+	}
+
+	for i in 0 .. int(n) {
+		unsafe {
+			dest_[i] = temp_buf[i]
+		}
+	}
+	unsafe { free(temp_buf) }
+	return unsafe { dest }
+}
+
+[export: 'calloc']
+[unsafe]
+fn __calloc(nmemb size_t, size size_t) &C.void {
+	new_area := unsafe { malloc(int(nmemb) * int(size)) }
+	unsafe { memset(new_area, 0, nmemb * size) }
+	return new_area
+}
+
+fn getchar() int {
+	x := byte(0)
+	sys_read(0, &x, 1)
+	return int(x)
+}
+
+fn memcmp(a &C.void, b &C.void, n size_t) int {
+	a_ := unsafe { &byte(a) }
+	b_ := unsafe { &byte(b) }
+	for i in 0 .. int(n) {
+		if unsafe { a_[i] != b_[i] } {
+			unsafe {
+				return a_[i] - b_[i]
+			}
+		}
+	}
+	return 0
+}
+
+[export: 'free']
+[unsafe]
+fn __free(ptr &C.void) {
+	err := mm_free(ptr)
+	if err != .enoerror {
+		eprintln('free error:')
+		panic(err)
+	}
+}
+
+fn vsprintf(str &char, format &char, ap &byte) int {
+	panic('vsprintf(): string interpolation is not supported in `-freestanding`')
+}
+
+fn vsnprintf(str &char, size size_t, format &char, ap &byte) int {
+	panic('vsnprintf(): string interpolation is not supported in `-freestanding`')
+}
+
+// not really needed
+fn bare_read(buf &byte, count u64) (i64, Errno) {
+	return sys_read(0, buf, count)
+}
+
+fn bare_print(buf &byte, len u64) {
+	sys_write(1, buf, len)
+}
+
+fn bare_eprint(buf &byte, len u64) {
+	sys_write(2, buf, len)
+}
+
+pub fn write(fd i64, buf &byte, count u64) i64 {
+	x, _ := sys_write(fd, buf, count)
+	return x
+}
+
+[noreturn]
+fn bare_panic(msg string) {
+	println('V panic' + msg)
+	exit(1)
+}
+
+fn bare_backtrace() string {
+	return 'backtraces are not available with `-freestanding`'
+}
+
+[export: 'exit']
+[noreturn]
+fn __exit(code int) {
+	sys_exit(code)
+}
diff --git a/v_windows/v/old/vlib/builtin/linux_bare/linux_syscalls.v b/v_windows/v/old/vlib/builtin/linux_bare/linux_syscalls.v
new file mode 100644
index 0000000..b0b2c47
--- /dev/null
+++ b/v_windows/v/old/vlib/builtin/linux_bare/linux_syscalls.v
@@ -0,0 +1,433 @@
+module builtin
+
+enum SigIndex {
+	si_signo = 0x00
+	si_code = 0x02
+	si_pid = 0x04
+	si_uid = 0x05
+	si_status = 0x06
+	si_size = 0x80
+}
+
+enum Signo {
+	sighup = 1 // Hangup.
+	sigint = 2 // Interactive attention signal.
+	sigquit = 3 // Quit.
+	sigill = 4 // Illegal instruction.
+	sigtrap = 5 // Trace/breakpoint trap.
+	sigabrt = 6 // Abnormal termination.
+	sigbus = 7
+	sigfpe = 8 // Erroneous arithmetic operation.
+	sigkill = 9 // Killed.
+	sigusr1 = 10
+	sigsegv = 11 // Invalid access to memory.
+	sigusr2 = 12
+	sigpipe = 13 // Broken pipe.
+	sigalrm = 14 // Alarm clock.
+	sigterm = 15 // Termination request.
+	sigstkflt = 16
+	sigchld = 17
+	sigcont = 18
+	sigstop = 19
+	sigtstp = 20
+	sigttin = 21 // Background read from control terminal.
+	sigttou = 22 // Background write to control terminal.
+	sigurg = 23
+	sigxcpu = 24 // CPU time limit exceeded.
+	sigxfsz = 25 // File size limit exceeded.
+	sigvtalrm = 26 // Virtual timer expired.
+	sigprof = 27 // Profiling timer expired.
+	sigwinch = 28
+	sigpoll = 29
+	sigsys = 31
+}
+
+// List of all the errors returned by syscalls
+enum Errno {
+	enoerror = 0x00000000
+	eperm = 0x00000001
+	enoent = 0x00000002
+	esrch = 0x00000003
+	eintr = 0x00000004
+	eio = 0x00000005
+	enxio = 0x00000006
+	e2big = 0x00000007
+	enoexec = 0x00000008
+	ebadf = 0x00000009
+	echild = 0x0000000a
+	eagain = 0x0000000b
+	enomem = 0x0000000c
+	eacces = 0x0000000d
+	efault = 0x0000000e
+	enotblk = 0x0000000f
+	ebusy = 0x00000010
+	eexist = 0x00000011
+	exdev = 0x00000012
+	enodev = 0x00000013
+	enotdir = 0x00000014
+	eisdir = 0x00000015
+	einval = 0x00000016
+	enfile = 0x00000017
+	emfile = 0x00000018
+	enotty = 0x00000019
+	etxtbsy = 0x0000001a
+	efbig = 0x0000001b
+	enospc = 0x0000001c
+	espipe = 0x0000001d
+	erofs = 0x0000001e
+	emlink = 0x0000001f
+	epipe = 0x00000020
+	edom = 0x00000021
+	erange = 0x00000022
+}
+
+enum MemProt {
+	prot_read = 0x1
+	prot_write = 0x2
+	prot_exec = 0x4
+	prot_none = 0x0
+	prot_growsdown = 0x01000000
+	prot_growsup = 0x02000000
+}
+
+enum MapFlags {
+	map_shared = 0x01
+	map_private = 0x02
+	map_shared_validate = 0x03
+	map_type = 0x0f
+	map_fixed = 0x10
+	map_file = 0x00
+	map_anonymous = 0x20
+	map_huge_shift = 26
+	map_huge_mask = 0x3f
+}
+
+//   const (
+// 	fcntlf_dupfd         = 0x00000000
+// 	fcntlf_exlck         = 0x00000004
+// 	fcntlf_getfd         = 0x00000001
+// 	fcntlf_getfl         = 0x00000003
+// 	fcntlf_getlk         = 0x00000005
+// 	fcntlf_getlk64       = 0x0000000c
+// 	fcntlf_getown        = 0x00000009
+// 	fcntlf_getowner_uids = 0x00000011
+// 	fcntlf_getown_ex     = 0x00000010
+// 	fcntlf_getsig        = 0x0000000b
+// 	fcntlf_ofd_getlk     = 0x00000024
+// 	fcntlf_ofd_setlk     = 0x00000025
+// 	fcntlf_ofd_setlkw    = 0x00000026
+// 	fcntlf_owner_pgrp    = 0x00000002
+// 	fcntlf_owner_pid     = 0x00000001
+// 	fcntlf_owner_tid     = 0x00000000
+// 	fcntlf_rdlck         = 0x00000000
+// 	fcntlf_setfd         = 0x00000002
+// 	fcntlf_setfl         = 0x00000004
+// 	fcntlf_setlk         = 0x00000006
+// 	fcntlf_setlk64       = 0x0000000d
+// 	fcntlf_setlkw        = 0x00000007
+// 	fcntlf_setlkw64      = 0x0000000e
+// 	fcntlf_setown        = 0x00000008
+// 	fcntlf_setown_ex     = 0x0000000f
+// 	fcntlf_setsig        = 0x0000000a
+// 	fcntlf_shlck         = 0x00000008
+// 	fcntlf_unlck         = 0x00000002
+// 	fcntlf_wrlck         = 0x00000001
+// 	fcntllock_ex         = 0x00000002
+// 	fcntllock_mand       = 0x00000020
+// 	fcntllock_nb         = 0x00000004
+// 	fcntllock_read       = 0x00000040
+// 	fcntllock_rw         = 0x000000c0
+// 	fcntllock_sh         = 0x00000001
+// 	fcntllock_un         = 0x00000008
+// 	fcntllock_write      = 0x00000080
+// 	fcntlo_accmode       = 0x00000003
+// 	fcntlo_append        = 0x00000400
+// 	fcntlo_cloexec       = 0x00080000
+// 	fcntlo_creat         = 0x00000040
+// 	fcntlo_direct        = 0x00004000
+// 	fcntlo_directory     = 0x00010000
+// 	fcntlo_dsync         = 0x00001000
+// 	fcntlo_excl          = 0x00000080
+// 	fcntlo_largefile     = 0x00008000
+// 	fcntlo_ndelay        = 0x00000800
+// 	fcntlo_noatime       = 0x00040000
+// 	fcntlo_noctty        = 0x00000100
+// 	fcntlo_nofollow      = 0x00020000
+// 	fcntlo_nonblock      = 0x00000800
+// 	fcntlo_path          = 0x00200000
+// 	fcntlo_rdonly        = 0x00000000
+// 	fcntlo_rdwr          = 0x00000002
+// 	fcntlo_trunc         = 0x00000200
+// 	fcntlo_wronly        = 0x00000001
+// )
+
+/*
+Paraphrased from "man 2 waitid" on Linux
+
+	Upon successful return, waitid() fills in the
+	following fields of the siginfo_t structure
+	pointed to by infop:
+
+	si_pid, offset 0x10, int index 0x04:
+		The process ID of the child.
+
+	si_uid: offset 0x14, int index 0x05
+		The real user ID of the child.
+
+	si_signo: offset 0x00, int index 0x00
+		Always set to SIGCHLD.
+
+	si_status: ofset 0x18, int index 0x06
+		1 the exit status of the child, as given to _exit(2)
+			(or exit(3)) (sc_sys.cld_exited)
+		2 the signal that caused the child to terminate, stop,
+			or continue.
+		3 The si_code field can be used to determine how to
+			interpret this field.
+
+	si_code, set to one of (enum Wi_si_code), offset 0x08, int index 0x02:
+		CLD_EXITED (child called _exit(2));
+		CLD_KILLED (child killed by signal);
+		CLD_DUMPED (child  killed by signal, and dumped core);
+		CLD_STOPPED (child stopped by signal);
+		CLD_TRAPPED (traced child has trapped);
+		CLD_CONTINUED (child continued by SIGCONT).
+*/
+
+const (
+	wp_sys_wnohang     = u64(0x00000001)
+	wp_sys_wuntraced   = u64(0x00000002)
+	wp_sys_wstopped    = u64(0x00000002)
+	wp_sys_wexited     = u64(0x00000004)
+	wp_sys_wcontinued  = u64(0x00000008)
+	wp_sys_wnowait     = u64(0x01000000) // don't reap, just poll status.
+	wp_sys___wnothread = u64(0x20000000) // don't wait on children of other threads in this group
+	wp_sys___wall      = u64(0x40000000) // wait on all children, regardless of type
+	wp_sys___wclone    = u64(0x80000000) // wait only on non-sigchld children
+)
+
+// First argument to waitid:
+enum WiWhich {
+	p_all = 0
+	p_pid = 1
+	p_pgid = 2
+}
+
+enum WiSiCode {
+	cld_exited = 1 // child has exited
+	cld_killed = 2 // child was killed
+	cld_dumped = 3 // child terminated abnormally
+	cld_trapped = 4 // traced child has trapped
+	cld_stopped = 5 // child has stopped
+	cld_continued = 6 // stopped child has continued
+}
+
+fn split_int_errno(rc_in u64) (i64, Errno) {
+	rc := i64(rc_in)
+	if rc < 0 {
+		return i64(-1), Errno(-rc)
+	}
+	return rc, Errno.enoerror
+}
+
+// 0 sys_read
+fn sys_read(fd i64, buf &byte, count u64) (i64, Errno) {
+	return split_int_errno(sys_call3(0, u64(fd), u64(buf), count))
+}
+
+// 1 sys_write
+pub fn sys_write(fd i64, buf &byte, count u64) (i64, Errno) {
+	return split_int_errno(sys_call3(1, u64(fd), u64(buf), count))
+}
+
+// 2 sys_open
+fn sys_open(filename &byte, flags i64, mode int) (i64, Errno) {
+	return split_int_errno(sys_call3(2, u64(filename), u64(flags), u64(mode)))
+}
+
+// 3 sys_close
+fn sys_close(fd i64) Errno {
+	return Errno(-i64(sys_call1(3, u64(fd))))
+}
+
+// 9 sys_mmap
+fn sys_mmap(addr &byte, len u64, prot MemProt, flags MapFlags, fildes u64, off u64) (&byte, Errno) {
+	rc := sys_call6(9, u64(addr), len, u64(prot), u64(flags), fildes, off)
+	a, e := split_int_errno(rc)
+	return &byte(a), e
+}
+
+// 11 sys_munmap
+fn sys_munmap(addr voidptr, len u64) Errno {
+	return Errno(-sys_call2(11, u64(addr), len))
+}
+
+// 22  sys_pipe
+fn sys_pipe(filedes &int) Errno {
+	return Errno(sys_call1(22, u64(filedes)))
+}
+
+// 24 sys_sched_yield
+fn sys_sched_yield() Errno {
+	return Errno(sys_call0(24))
+}
+
+// 28 sys_madvise
+fn sys_madvise(addr voidptr, len u64, advice int) Errno {
+	return Errno(sys_call3(28, u64(addr), len, u64(advice)))
+}
+
+// 39 sys_getpid
+fn sys_getpid() int {
+	return int(sys_call0(39))
+}
+
+// 57 sys_fork
+fn sys_fork() int {
+	return int(sys_call0(57))
+}
+
+// 58 sys_vfork
+fn sys_vfork() int {
+	return int(sys_call0(58))
+}
+
+// 33  sys_dup2
+fn sys_dup2(oldfd int, newfd int) (i64, Errno) {
+	return split_int_errno(sys_call2(33, u64(oldfd), u64(newfd)))
+}
+
+// 59  sys_execve
+fn sys_execve(filename &byte, argv []&byte, envp []&byte) int {
+	return int(sys_call3(59, u64(filename), argv.data, envp.data))
+}
+
+// 60 sys_exit
+[noreturn]
+fn sys_exit(ec int) {
+	sys_call1(60, u64(ec))
+	for {}
+}
+
+// 102 sys_getuid
+fn sys_getuid() int {
+	return int(sys_call0(102))
+}
+
+// 247 sys_waitid
+fn sys_waitid(which WiWhich, pid int, infop &int, options int, ru voidptr) Errno {
+	return Errno(sys_call5(247, u64(which), u64(pid), u64(infop), u64(options), u64(ru)))
+}
+
+fn sys_call0(scn u64) u64 {
+	mut res := u64(0)
+	asm amd64 {
+		syscall
+		; =a (res)
+		; a (scn)
+	}
+	return res
+}
+
+fn sys_call1(scn u64, arg1 u64) u64 {
+	mut res := u64(0)
+	asm amd64 {
+		syscall
+		; =a (res)
+		; a (scn)
+		  D (arg1)
+	}
+	return res
+}
+
+fn sys_call2(scn u64, arg1 u64, arg2 u64) u64 {
+	mut res := u64(0)
+	asm amd64 {
+		syscall
+		; =a (res)
+		; a (scn)
+		  D (arg1)
+		  S (arg2)
+	}
+	return res
+}
+
+fn sys_call3(scn u64, arg1 u64, arg2 u64, arg3 u64) u64 {
+	mut res := u64(0)
+	asm amd64 {
+		syscall
+		; =a (res)
+		; a (scn)
+		  D (arg1)
+		  S (arg2)
+		  d (arg3)
+	}
+	return res
+}
+
+fn sys_call4(scn u64, arg1 u64, arg2 u64, arg3 u64, arg4 u64) u64 {
+	mut res := u64(0)
+	asm amd64 {
+		mov r10, arg4
+		syscall
+		; =a (res)
+		; a (scn)
+		  D (arg1)
+		  S (arg2)
+		  d (arg3)
+		  r (arg4)
+		; r10
+	}
+	return res
+}
+
+fn sys_call5(scn u64, arg1 u64, arg2 u64, arg3 u64, arg4 u64, arg5 u64) u64 {
+	mut res := u64(0)
+	asm amd64 {
+		mov r10, arg4
+		mov r8, arg5
+		syscall
+		; =a (res)
+		; a (scn)
+		  D (arg1)
+		  S (arg2)
+		  d (arg3)
+		  r (arg4)
+		  r (arg5)
+		; r10
+		  r8
+	}
+	return res
+}
+
+fn sys_call6(scn u64, arg1 u64, arg2 u64, arg3 u64, arg4 u64, arg5 u64, arg6 u64) u64 {
+	mut res := u64(0)
+	asm amd64 {
+		mov r10, arg4
+		mov r8, arg5
+		mov r9, arg6
+		syscall
+		; =a (res)
+		; a (scn)
+		  D (arg1)
+		  S (arg2)
+		  d (arg3)
+		  r (arg4)
+		  r (arg5)
+		  r (arg6)
+		; r10
+		  r8
+		  r9
+	}
+	return res
+}
+
+asm amd64 {
+	.globl _start
+	_start:
+	call main
+	mov rax, 60
+	xor rdi, rdi
+	syscall
+	ret
+}
diff --git a/v_windows/v/old/vlib/builtin/linux_bare/memory_managment.v b/v_windows/v/old/vlib/builtin/linux_bare/memory_managment.v
new file mode 100644
index 0000000..9c23dcf
--- /dev/null
+++ b/v_windows/v/old/vlib/builtin/linux_bare/memory_managment.v
@@ -0,0 +1,29 @@
+module builtin
+
+fn mm_alloc(size u64) (&byte, Errno) {
+	// BEGIN CONSTS
+	// the constants need to be here, since the initialization of other constants,
+	// which happen before these ones would, require malloc
+	mem_prot := MemProt(int(MemProt.prot_read) | int(MemProt.prot_write))
+	map_flags := MapFlags(int(MapFlags.map_private) | int(MapFlags.map_anonymous))
+	// END CONSTS
+
+	a, e := sys_mmap(&byte(0), size + sizeof(u64), mem_prot, map_flags, -1, 0)
+	if e == .enoerror {
+		unsafe {
+			mut ap := &u64(a)
+			*ap = size
+			x2 := &byte(a + sizeof(u64))
+			return x2, e
+		}
+	}
+	return &byte(0), e
+}
+
+fn mm_free(addr &byte) Errno {
+	unsafe {
+		ap := &u64(addr - sizeof(u64))
+		size := *ap
+		return sys_munmap(addr - sizeof(u64), size + sizeof(u64))
+	}
+}
diff --git a/v_windows/v/old/vlib/builtin/linux_bare/old/.checks/.gitignore b/v_windows/v/old/vlib/builtin/linux_bare/old/.checks/.gitignore
new file mode 100644
index 0000000..4132964
--- /dev/null
+++ b/v_windows/v/old/vlib/builtin/linux_bare/old/.checks/.gitignore
@@ -0,0 +1,5 @@
+checks
+linuxsys/linuxsys
+string/string
+consts/consts
+structs/structs
diff --git a/v_windows/v/old/vlib/builtin/linux_bare/old/.checks/checks.v b/v_windows/v/old/vlib/builtin/linux_bare/old/.checks/checks.v
new file mode 100644
index 0000000..8fd3575
--- /dev/null
+++ b/v_windows/v/old/vlib/builtin/linux_bare/old/.checks/checks.v
@@ -0,0 +1,32 @@
+module main
+
+import os
+
+fn failed (msg string) {
+	println ("!!! failed: $msg")
+}
+
+fn passed (msg string) {
+	println (">>> passed: $msg")
+}
+
+
+fn vcheck(vfile string) {
+	run_check := "v -user_mod_path . -freestanding run "
+	if 0 == os.system("$run_check $vfile/${vfile}.v") {
+		passed(run_check)
+	} else {
+		failed(run_check)
+	}
+	os.system("ls -lh $vfile/$vfile")
+	os.system("rm -f $vfile/$vfile")
+}
+
+fn main() {
+	vcheck("linuxsys")
+	vcheck("string")
+	vcheck("consts")
+	vcheck("structs")
+	exit(0)
+}
+
diff --git a/v_windows/v/old/vlib/builtin/linux_bare/old/.checks/consts/consts.v b/v_windows/v/old/vlib/builtin/linux_bare/old/.checks/consts/consts.v
new file mode 100644
index 0000000..eee2c61
--- /dev/null
+++ b/v_windows/v/old/vlib/builtin/linux_bare/old/.checks/consts/consts.v
@@ -0,0 +1,22 @@
+module main
+import forkedtest
+
+const (
+	integer1 = 111
+	integer2 = 222
+	integer3 = integer1+integer2
+	integer9 = integer3 * 3
+	abc = "123"
+)
+
+fn check_const_initialization() {
+	assert abc == "123"
+	assert integer9 == 999
+}
+
+fn main(){
+	mut fails := 0
+	fails += forkedtest.normal_run(check_const_initialization, "check_const_initialization")
+	assert fails == 0
+	sys_exit(0)
+}
diff --git a/v_windows/v/old/vlib/builtin/linux_bare/old/.checks/forkedtest/forkedtest.v b/v_windows/v/old/vlib/builtin/linux_bare/old/.checks/forkedtest/forkedtest.v
new file mode 100644
index 0000000..6d9272c
--- /dev/null
+++ b/v_windows/v/old/vlib/builtin/linux_bare/old/.checks/forkedtest/forkedtest.v
@@ -0,0 +1,49 @@
+module forkedtest
+
+pub fn run (op fn(), label string, code Wi_si_code, status int) int {
+	child := sys_fork()
+	if child == 0 {
+		op()
+		sys_exit(0)
+	}
+
+	siginfo := []int{len:int(Sig_index.si_size)}
+
+	e := sys_waitid(.p_pid, child, intptr(&siginfo[0]), .wexited, 0)
+
+	assert e == .enoerror
+	assert siginfo[int(Sig_index.si_pid)] == child
+	assert siginfo[int(Sig_index.si_signo)] == int(Signo.sigchld)
+	assert siginfo[int(Sig_index.si_uid)] == sys_getuid()
+
+	r_code := siginfo[Sig_index.si_code]
+	r_status := siginfo[Sig_index.si_status]
+
+	print("+++ ")
+	print(label)
+	if (int(code) == r_code) && (status == r_status) {
+		println(" PASSED")
+		return 0
+	}
+	println(" FAILED")
+
+	if int(code) != r_code {
+		print(">> Expecting si_code 0x")
+		println(i64_str(int(code),16))
+		print(">> Got 0x")
+		println(i64_str(r_code,16))
+	}
+
+	if status != r_status {
+		print(">> Expecting status 0x")
+		println(i64_str(status,16))
+		print(">> Got 0x")
+		println(i64_str(r_status,16))
+	}
+
+	return 1
+}
+
+pub fn normal_run (op fn(), label string) int {
+	return run (op, label, .cld_exited, 0)
+}
diff --git a/v_windows/v/old/vlib/builtin/linux_bare/old/.checks/linuxsys/linuxsys.v b/v_windows/v/old/vlib/builtin/linux_bare/old/.checks/linuxsys/linuxsys.v
new file mode 100644
index 0000000..cca5cb6
--- /dev/null
+++ b/v_windows/v/old/vlib/builtin/linux_bare/old/.checks/linuxsys/linuxsys.v
@@ -0,0 +1,300 @@
+module main
+import forkedtest
+
+const (
+	sample_text_file1 = ""
+)
+
+fn check_fork_minimal () {
+	child := sys_fork()
+	ec := 100
+	if child == 0 {
+		println("child")
+		sys_exit(ec)
+	}
+	siginfo := [
+		0, 0, 0, 0, 0, 0, 0, 0,
+		0, 0, 0, 0, 0, 0, 0, 0,
+		0, 0, 0, 0, 0, 0, 0, 0,
+		0, 0, 0, 0, 0, 0, 0, 0,
+		0, 0, 0, 0, 0, 0, 0, 0,
+		0, 0, 0, 0, 0, 0, 0, 0,
+		0, 0, 0, 0, 0, 0, 0, 0,
+		0, 0, 0, 0, 0, 0, 0, 0]
+
+	e := sys_waitid(.p_pid, child, intptr(siginfo.data) , .wexited, 0)
+
+	assert e == .enoerror
+	//println(i64_tos(buffer0,80,siginfo[Sig_index.si_code],16))
+	assert siginfo[Sig_index.si_code] == int(Wi_si_code.cld_exited)
+	assert siginfo[Sig_index.si_pid] == child
+	assert siginfo[Sig_index.si_status] == ec
+	assert siginfo[Sig_index.si_signo] == int(Signo.sigchld)
+	assert siginfo[Sig_index.si_uid] == sys_getuid()
+}
+
+fn check_read_write_pipe() {
+	//	Checks the following system calls:
+	//		sys_pipe
+	//		sys_write
+	//		sys_read
+	//		sys_close
+	//
+	buffer0 := []byte{len:(128)}
+	buffer := byteptr(buffer0.data)
+
+	fd := [-1, -1]
+
+	assert fd[0] == -1
+	assert fd[1] == -1
+
+	a := sys_pipe(intptr(&fd[0]))
+
+	assert a == .enoerror
+
+	assert fd[0] != -1
+	assert fd[1] != -1
+
+	test_data := "test_data"
+	b := test_data.len + 1
+	c1, e1 := sys_write (fd[1], test_data.str, u64(b))
+
+	assert e1 == .enoerror
+	assert c1 == b
+
+	c2, e2 := sys_read(fd[0], buffer, u64(b))
+
+	assert e2 == .enoerror
+	assert c2 == b
+
+	assert buffer[b-1] == 0
+
+	for i in 0..b {
+		assert test_data[i] == buffer[i]
+	}
+
+	assert sys_close(fd[0]) == .enoerror
+	assert sys_close(fd[1]) == .enoerror
+
+	assert sys_close(-1) == .ebadf
+}
+
+fn check_read_file() {
+	/*
+		Checks the following system calls:
+			sys_read
+			sys_write
+			sys_close
+			sys_open
+	*/
+	buffer0 := []byte{len:(128)}
+	buffer := byteptr(buffer0.data)
+
+	test_file := "sample_text1.txt"
+	sample_text := "Do not change this text.\n"
+	fd, ec := sys_open(test_file.str, .o_rdonly, 0)
+	assert fd > 0
+	assert ec == .enoerror
+	n := sample_text.len
+	c, e := sys_read(fd, buffer, u64(n*2))
+	assert e == .enoerror
+	assert c == n
+	for i in 0..n {
+		assert sample_text[i] == buffer[i]
+	}
+	assert sys_close(fd) == .enoerror
+}
+
+fn check_open_file_fail() {
+	fd1, ec1 := sys_open("./nofilehere".str, .o_rdonly, 0)
+	assert fd1 == -1
+	assert ec1 == .enoent
+}
+
+/*
+fn check_print() {
+	println ("checking print and println")
+
+	a := sys_pipe(intptr(fd))
+	assert a != -1
+	assert fd[0] != -1
+	assert fd[1] != -1
+
+	//sys_dup2
+	println ("print and println passed")
+}
+*/
+
+fn check_munmap_fail() {
+	ec := sys_munmap(-16384,8192)
+	assert ec == .einval
+}
+
+fn check_mmap_one_page() {
+	mp := int(Mm_prot.prot_read) | int(Mm_prot.prot_write)
+	mf := int(Map_flags.map_private) | int(Map_flags.map_anonymous)
+	mut a, e := sys_mmap(0, u64(Linux_mem.page_size), Mm_prot(mp), Map_flags(mf), -1, 0)
+
+	assert e == .enoerror
+	assert a != byteptr(-1)
+
+	for i in 0..int(Linux_mem.page_size) {
+		b := i & 0xFF
+		a[i] = b
+		assert a[i] == b
+	}
+
+	ec := sys_munmap(a, u64(Linux_mem.page_size))
+	assert ec == .enoerror
+}
+
+fn check_mm_pages() {
+	for i in 0 .. int(Linux_mem.page_size)-4 {
+		assert u32(1) == mm_pages(u64(i))
+	}
+	for i in int(Linux_mem.page_size)-3 .. (int(Linux_mem.page_size)*2)-4 {
+		assert u32(2) == mm_pages(u64(i))
+	}
+	for i in (int(Linux_mem.page_size)*2)-3 .. (int(Linux_mem.page_size)*3)-4 {
+		assert u32(3) == mm_pages(u64(i))
+	}
+}
+
+//pub fn mm_alloc(size u64) (voidptr, Errno)
+
+fn check_mm_alloc() {
+	for i in 1 .. 2000 {
+		size := u64(i*1000)
+		pages := mm_pages(size)
+		mut a, e := mm_alloc(size)
+
+		assert e == .enoerror
+		ap := intptr(a-4)
+		assert *ap == int(pages)
+		assert e == .enoerror
+		assert !isnil(a)
+
+		if (i%111) == 0 {
+			for j in 0 .. int(size) {
+				b := j & 0xFF
+				a[j] = b
+				assert b == int(a[j])
+			}
+		}
+
+		mfa := mm_free(a)
+
+		assert mfa == .enoerror
+	}
+}
+
+fn check_int_array_ro() {
+	a := [100,110,120,130]
+	assert a.len == 4
+	assert a[0] == 100
+	assert a[1] == 110
+	assert a[2] == 120
+	assert a[3] == 130
+}
+
+fn check_int_array_rw() {
+	mut a := [-10,-11,-12,-13]
+	assert a.len == 4
+	assert a[0] == -10
+	assert a[1] == -11
+	assert a[2] == -12
+	assert a[3] == -13
+	for i in 0..a.len {
+		b := -a[i] * 10
+		a[i] = b
+		assert a[i] == b
+	}
+	assert a[3] == 130
+}
+
+fn check_int64_array_ro() {
+	a := [i64(1000),1100,1200,1300,1400]
+	assert a.len == 5
+	assert a[0] == 1000
+	assert a[1] == 1100
+	assert a[2] == 1200
+	assert a[3] == 1300
+	assert a[4] == 1400
+}
+
+fn check_voidptr_array_ro() {
+	a := [
+		voidptr(10000),
+		voidptr(11000),
+		voidptr(12000),
+		voidptr(13000),
+		voidptr(14000),
+		voidptr(15000)
+	]
+	assert a.len == 6
+	assert a[0] == voidptr(10000)
+	assert a[1] == voidptr(11000)
+	assert a[2] == voidptr(12000)
+	assert a[3] == voidptr(13000)
+	assert a[4] == voidptr(14000)
+	assert a[5] == voidptr(15000)
+}
+
+fn check_voidptr_array_rw() {
+	mut a := [
+		voidptr(-1),
+		voidptr(-1),
+		voidptr(-1),
+		voidptr(-1),
+		voidptr(-1),
+		voidptr(-1)
+	]
+	assert a.len == 6
+
+	assert a[0] == voidptr(-1)
+	assert a[1] == voidptr(-1)
+	assert a[2] == voidptr(-1)
+	assert a[3] == voidptr(-1)
+	assert a[4] == voidptr(-1)
+	assert a[5] == voidptr(-1)
+
+	a[0] = voidptr(100000)
+	assert a[0] == voidptr(100000)
+
+	a[1] = voidptr(110000)
+	assert a[1] == voidptr(110000)
+
+	a[2] = voidptr(120000)
+	assert a[2] == voidptr(120000)
+
+	a[3] = voidptr(130000)
+	assert a[3] == voidptr(130000)
+
+	a[4] = voidptr(140000)
+	assert a[4] == voidptr(140000)
+
+	a[5] = voidptr(150000)
+	assert a[5] == voidptr(150000)
+}
+
+
+fn main() {
+	mut fails := 0
+	fails += forkedtest.normal_run(check_fork_minimal, "check_fork_minimal")
+	fails += forkedtest.normal_run(check_munmap_fail, "check_munmap_fail")
+	fails += forkedtest.normal_run(check_mmap_one_page, "check_mmap_one_page")
+	fails += forkedtest.normal_run(check_mm_pages, "check_mm_pages")
+	fails += forkedtest.normal_run(check_mm_alloc, "check_mm_alloc")
+	fails += forkedtest.normal_run(check_read_write_pipe, "check_read_write_pipe")
+	fails += forkedtest.normal_run(check_read_file, "check_read_file")
+	// check_print()
+	fails += forkedtest.normal_run(check_open_file_fail, "check_open_file_fail")
+	fails += forkedtest.normal_run(check_int_array_ro, "check_int_array_ro")
+	fails += forkedtest.normal_run(check_int_array_rw, "check_int_array_rw")
+	fails += forkedtest.normal_run(check_int64_array_ro, "check_int64_array_ro")
+	fails += forkedtest.normal_run(check_voidptr_array_ro, "check_voidptr_array_ro")
+	fails += forkedtest.normal_run(check_voidptr_array_rw, "check_voidptr_array_rw")
+
+	assert fails == 0
+	sys_exit(0)
+}
diff --git a/v_windows/v/old/vlib/builtin/linux_bare/old/.checks/readme.md b/v_windows/v/old/vlib/builtin/linux_bare/old/.checks/readme.md
new file mode 100644
index 0000000..03c1b30
--- /dev/null
+++ b/v_windows/v/old/vlib/builtin/linux_bare/old/.checks/readme.md
@@ -0,0 +1,5 @@
+In this directory:
+```
+v run checks.v
+```
+
diff --git a/v_windows/v/old/vlib/builtin/linux_bare/old/.checks/sample_text1.txt b/v_windows/v/old/vlib/builtin/linux_bare/old/.checks/sample_text1.txt
new file mode 100644
index 0000000..f06e75a
--- /dev/null
+++ b/v_windows/v/old/vlib/builtin/linux_bare/old/.checks/sample_text1.txt
@@ -0,0 +1 @@
+Do not change this text.
diff --git a/v_windows/v/old/vlib/builtin/linux_bare/old/.checks/string/string.v b/v_windows/v/old/vlib/builtin/linux_bare/old/.checks/string/string.v
new file mode 100644
index 0000000..54c06e7
--- /dev/null
+++ b/v_windows/v/old/vlib/builtin/linux_bare/old/.checks/string/string.v
@@ -0,0 +1,63 @@
+module main
+import forkedtest
+
+fn check_string_eq () {
+	assert "monkey" != "rat"
+	some_animal := "a bird"
+	assert some_animal == "a bird"
+}
+
+fn check_i64_tos() {
+	buffer0 := []byte{len:(128)}
+	buffer := byteptr(buffer0.data)
+
+	s0 := i64_tos(buffer, 70, 140, 10)
+	assert s0 == "140"
+
+	s1 := i64_tos(buffer, 70, -160, 10)
+	assert s1 == "-160"
+
+	s2 := i64_tos(buffer, 70, 65537, 16)
+	assert s2 == "10001"
+
+	s3 := i64_tos(buffer, 70, -160000, 10)
+	assert s3 == "-160000"
+}
+
+fn check_i64_str() {
+	assert "141" == i64_str(141, 10)
+	assert "-161" == i64_str(-161, 10)
+	assert "10002" == i64_str(65538, 16)
+	assert "-160001" == i64_str(-160001, 10)
+}
+
+fn check_str_clone() {
+	a := i64_str(1234,10)
+	b := a.clone()
+	assert a == b
+	c := i64_str(-6789,10).clone()
+	assert c == "-6789"
+}
+
+fn check_string_add_works(){
+  abc := 'abc'
+  combined := 'a' + 'b' + 'c'
+  assert abc.len == combined.len
+  assert abc[0] == combined[0]
+  assert abc[1] == combined[1]
+  assert abc[2] == combined[2]
+  assert abc[0] == `a`
+  assert abc == combined
+}  
+
+fn main () {
+	mut fails := 0
+	fails += forkedtest.normal_run(check_string_eq, "check_string_eq")
+	fails += forkedtest.normal_run(check_i64_tos, "check_i64_tos")
+	fails += forkedtest.normal_run(check_i64_str, "check_i64_str")
+	fails += forkedtest.normal_run(check_str_clone, "check_str_clone")
+	fails += forkedtest.normal_run(check_string_add_works,    "check_string_add_works")
+	assert fails == 0
+	sys_exit(0)
+}
+
diff --git a/v_windows/v/old/vlib/builtin/linux_bare/old/.checks/structs/structs.v b/v_windows/v/old/vlib/builtin/linux_bare/old/.checks/structs/structs.v
new file mode 100644
index 0000000..f63285d
--- /dev/null
+++ b/v_windows/v/old/vlib/builtin/linux_bare/old/.checks/structs/structs.v
@@ -0,0 +1,42 @@
+module main
+import forkedtest
+
+struct SimpleEmptyStruct{
+}
+
+struct NonEmptyStruct{
+  x int
+  y int
+  z int
+}
+
+fn check_simple_empty_struct(){  
+  s := SimpleEmptyStruct{}
+  addr_s := &s
+  str_addr_s := ptr_str( addr_s )
+  assert !isnil(addr_s)
+  assert str_addr_s.len > 3
+  println(str_addr_s)
+}
+
+fn check_non_empty_struct(){  
+  a := NonEmptyStruct{1,2,3}
+  b := NonEmptyStruct{4,5,6}
+  assert sizeof(NonEmptyStruct) > 0
+  assert sizeof(SimpleEmptyStruct) < sizeof(NonEmptyStruct)
+  assert a.x == 1
+  assert a.y == 2
+  assert a.z == 3
+  assert b.x + b.y + b.z == 15
+  assert ptr_str(&a) != ptr_str(&b)
+  println('sizeof SimpleEmptyStruct:' + i64_str( sizeof(SimpleEmptyStruct) , 10 ))
+  println('sizeof NonEmptyStruct:' + i64_str( sizeof(NonEmptyStruct) , 10 ))
+}
+
+fn main(){
+	mut fails := 0
+	fails += forkedtest.normal_run(check_simple_empty_struct, "check_simple_empty_struct")
+	fails += forkedtest.normal_run(check_non_empty_struct,    "check_non_empty_struct")
+	assert fails == 0
+	sys_exit(0)
+}
diff --git a/v_windows/v/old/vlib/builtin/linux_bare/old/array_bare.v b/v_windows/v/old/vlib/builtin/linux_bare/old/array_bare.v
new file mode 100644
index 0000000..b92214f
--- /dev/null
+++ b/v_windows/v/old/vlib/builtin/linux_bare/old/array_bare.v
@@ -0,0 +1,53 @@
+module builtin
+
+pub struct array {
+pub:
+	data         voidptr
+	len          int
+	cap          int
+	element_size int
+}
+
+// for now off the stack
+fn new_array_from_c_array(len int, cap int, elm_size int, c_array voidptr) array {
+	arr := array{
+		len: len
+		cap: cap
+		element_size: elm_size
+		data: c_array
+	}
+	return arr
+}
+
+// Private function. Used to implement array[] operator
+fn (a array) get(i int) voidptr {
+	if i < 0 || i >= a.len {
+		panic('array.get: index out of range') // FIXME: (i == $i, a.len == $a.len)')
+	}
+	return a.data + i * a.element_size
+}
+
+// Private function. Used to implement assigment to the array element.
+fn (mut a array) set(i int, val voidptr) {
+	if i < 0 || i >= a.len {
+		panic('array.set: index out of range') // FIXME: (i == $i, a.len == $a.len)')
+	}
+	mem_copy(a.data + a.element_size * i, val, a.element_size)
+}
+
+// array.repeat returns new array with the given array elements
+// repeated `nr_repeat` times
+pub fn (a array) repeat(nr_repeats int) array {
+	assert nr_repeats >= 0
+
+	arr := array{
+		len: nr_repeats * a.len
+		cap: nr_repeats * a.len
+		element_size: a.element_size
+		data: malloc(nr_repeats * a.len * a.element_size)
+	}
+	for i in 0 .. nr_repeats {
+		mem_copy(arr.data + i * a.len * a.element_size, a.data, a.len * a.element_size)
+	}
+	return arr
+}
diff --git a/v_windows/v/old/vlib/builtin/linux_bare/old/builtin_bare.v b/v_windows/v/old/vlib/builtin/linux_bare/old/builtin_bare.v
new file mode 100644
index 0000000..a7be853
--- /dev/null
+++ b/v_windows/v/old/vlib/builtin/linux_bare/old/builtin_bare.v
@@ -0,0 +1,60 @@
+module builtin
+
+// called by the generated main/init
+fn init() {
+}
+
+pub fn isnil(p voidptr) bool {
+	return p == 0
+}
+
+pub fn print(s string) {
+	sys_write(1, s.str, u64(s.len))
+}
+
+pub fn println(s string) {
+	print(s)
+	print('\n')
+}
+
+pub fn panic(s string) {
+	eprint('V panic: ')
+	eprintln(s)
+	sys_exit(1)
+}
+
+// replaces panic when -debug arg is passed
+fn panic_debug(line_no int, file string, mod string, fn_name string, s string) {
+	eprintln('================ V panic ================')
+	eprint('   module: ')
+	eprintln('mod')
+	eprint(' function: ')
+	eprint(fn_name)
+	eprintln('()')
+	eprintln('     file: ')
+	eprintln(file)
+	// println('     line: ${line_no}')
+	eprint('  message: ')
+	eprintln(s)
+	eprintln('=========================================')
+	sys_exit(1)
+}
+
+pub fn eprint(s string) {
+	if isnil(s.str) {
+		panic('eprint(NIL)')
+	}
+	sys_write(2, s.str, u64(s.len))
+}
+
+pub fn eprint_ln(s string) {
+	eprint(s)
+	eprint('\n')
+}
+
+pub fn eprintln(s string) {
+	if isnil(s.str) {
+		panic('eprintln(NIL)')
+	}
+	eprint_ln(s)
+}
diff --git a/v_windows/v/old/vlib/builtin/linux_bare/old/linuxsys_bare.v b/v_windows/v/old/vlib/builtin/linux_bare/old/linuxsys_bare.v
new file mode 100644
index 0000000..ddec203
--- /dev/null
+++ b/v_windows/v/old/vlib/builtin/linux_bare/old/linuxsys_bare.v
@@ -0,0 +1,759 @@
+module builtin
+
+pub enum Linux_mem {
+	page_size = 4096
+}
+
+pub const (
+	wp_sys_wnohang     = u64(0x00000001)
+	wp_sys_wuntraced   = u64(0x00000002)
+	wp_sys_wstopped    = u64(0x00000002)
+	wp_sys_wexited     = u64(0x00000004)
+	wp_sys_wcontinued  = u64(0x00000008)
+	wp_sys_wnowait     = u64(0x01000000) // don't reap, just poll status.
+	wp_sys___wnothread = u64(0x20000000) // don't wait on children of other threads in this group
+	wp_sys___wall      = u64(0x40000000) // wait on all children, regardless of type
+	wp_sys___wclone    = u64(0x80000000) // wait only on non-sigchld children
+)
+
+// First argument to waitid:
+pub enum Wi_which {
+	p_all = 0
+	p_pid = 1
+	p_pgid = 2
+}
+
+pub enum Wi_si_code {
+	cld_exited = 1 // child has exited
+	cld_killed = 2 // child was killed
+	cld_dumped = 3 // child terminated abnormally
+	cld_trapped = 4 // traced child has trapped
+	cld_stopped = 5 // child has stopped
+	cld_continued = 6 // stopped child has continued
+}
+
+/*
+Paraphrased from "man 2 waitid" on Linux
+
+	Upon successful return, waitid() fills in the
+	following fields of the siginfo_t structure
+	pointed to by infop:
+
+	si_pid, offset 0x10, int index 0x04:
+		The process ID of the child.
+
+	si_uid: offset 0x14, int index 0x05
+		The real user ID of the child.
+
+	si_signo: offset 0x00, int index 0x00
+		Always set to SIGCHLD.
+
+	si_status: ofset 0x18, int index 0x06
+		1 the exit status of the child, as given to _exit(2)
+			(or exit(3)) (sc_sys.cld_exited)
+		2 the signal that caused the child to terminate, stop,
+			or continue.
+		3 The si_code field can be used to determine how to
+			interpret this field.
+
+	si_code, set to one of (enum Wi_si_code), offset 0x08, int index 0x02:
+		CLD_EXITED (child called _exit(2));
+		CLD_KILLED (child killed by signal);
+		CLD_DUMPED (child  killed by signal, and dumped core);
+		CLD_STOPPED (child stopped by signal);
+		CLD_TRAPPED (traced child has trapped);
+		CLD_CONTINUED (child continued by SIGCONT).
+*/
+
+pub enum Sig_index {
+	si_signo = 0x00
+	si_code = 0x02
+	si_pid = 0x04
+	si_uid = 0x05
+	si_status = 0x06
+	si_size = 0x80
+}
+
+pub enum Signo {
+	sighup = 1 // Hangup.
+	sigint = 2 // Interactive attention signal.
+	sigquit = 3 // Quit.
+	sigill = 4 // Illegal instruction.
+	sigtrap = 5 // Trace/breakpoint trap.
+	sigabrt = 6 // Abnormal termination.
+	sigbus = 7
+	sigfpe = 8 // Erroneous arithmetic operation.
+	sigkill = 9 // Killed.
+	sigusr1 = 10
+	sigsegv = 11 // Invalid access to storage.
+	sigusr2 = 12
+	sigpipe = 13 // Broken pipe.
+	sigalrm = 14 // Alarm clock.
+	sigterm = 15 // Termination request.
+	sigstkflt = 16
+	sigchld = 17
+	sigcont = 18
+	sigstop = 19
+	sigtstp = 20
+	sigttin = 21 // Background read from control terminal.
+	sigttou = 22 // Background write to control terminal.
+	sigurg = 23
+	sigxcpu = 24 // CPU time limit exceeded.
+	sigxfsz = 25 // File size limit exceeded.
+	sigvtalrm = 26 // Virtual timer expired.
+	sigprof = 27 // Profiling timer expired.
+	sigwinch = 28
+	sigpoll = 29
+	sigsys = 31
+}
+
+pub const (
+	fcntlf_dupfd         = 0x00000000
+	fcntlf_exlck         = 0x00000004
+	fcntlf_getfd         = 0x00000001
+	fcntlf_getfl         = 0x00000003
+	fcntlf_getlk         = 0x00000005
+	fcntlf_getlk64       = 0x0000000c
+	fcntlf_getown        = 0x00000009
+	fcntlf_getowner_uids = 0x00000011
+	fcntlf_getown_ex     = 0x00000010
+	fcntlf_getsig        = 0x0000000b
+	fcntlf_ofd_getlk     = 0x00000024
+	fcntlf_ofd_setlk     = 0x00000025
+	fcntlf_ofd_setlkw    = 0x00000026
+	fcntlf_owner_pgrp    = 0x00000002
+	fcntlf_owner_pid     = 0x00000001
+	fcntlf_owner_tid     = 0x00000000
+	fcntlf_rdlck         = 0x00000000
+	fcntlf_setfd         = 0x00000002
+	fcntlf_setfl         = 0x00000004
+	fcntlf_setlk         = 0x00000006
+	fcntlf_setlk64       = 0x0000000d
+	fcntlf_setlkw        = 0x00000007
+	fcntlf_setlkw64      = 0x0000000e
+	fcntlf_setown        = 0x00000008
+	fcntlf_setown_ex     = 0x0000000f
+	fcntlf_setsig        = 0x0000000a
+	fcntlf_shlck         = 0x00000008
+	fcntlf_unlck         = 0x00000002
+	fcntlf_wrlck         = 0x00000001
+	fcntllock_ex         = 0x00000002
+	fcntllock_mand       = 0x00000020
+	fcntllock_nb         = 0x00000004
+	fcntllock_read       = 0x00000040
+	fcntllock_rw         = 0x000000c0
+	fcntllock_sh         = 0x00000001
+	fcntllock_un         = 0x00000008
+	fcntllock_write      = 0x00000080
+	fcntlo_accmode       = 0x00000003
+	fcntlo_append        = 0x00000400
+	fcntlo_cloexec       = 0x00080000
+	fcntlo_creat         = 0x00000040
+	fcntlo_direct        = 0x00004000
+	fcntlo_directory     = 0x00010000
+	fcntlo_dsync         = 0x00001000
+	fcntlo_excl          = 0x00000080
+	fcntlo_largefile     = 0x00008000
+	fcntlo_ndelay        = 0x00000800
+	fcntlo_noatime       = 0x00040000
+	fcntlo_noctty        = 0x00000100
+	fcntlo_nofollow      = 0x00020000
+	fcntlo_nonblock      = 0x00000800
+	fcntlo_path          = 0x00200000
+	fcntlo_rdonly        = 0x00000000
+	fcntlo_rdwr          = 0x00000002
+	fcntlo_trunc         = 0x00000200
+	fcntlo_wronly        = 0x00000001
+)
+
+pub enum Errno {
+	enoerror = 0x00000000
+	e2big = 0x00000007
+	eacces = 0x0000000d
+	eagain = 0x0000000b
+	ebadf = 0x00000009
+	ebusy = 0x00000010
+	echild = 0x0000000a
+	edom = 0x00000021
+	eexist = 0x00000011
+	efault = 0x0000000e
+	efbig = 0x0000001b
+	eintr = 0x00000004
+	einval = 0x00000016
+	eio = 0x00000005
+	eisdir = 0x00000015
+	emfile = 0x00000018
+	emlink = 0x0000001f
+	enfile = 0x00000017
+	enodev = 0x00000013
+	enoent = 0x00000002
+	enoexec = 0x00000008
+	enomem = 0x0000000c
+	enospc = 0x0000001c
+	enotblk = 0x0000000f
+	enotdir = 0x00000014
+	enotty = 0x00000019
+	enxio = 0x00000006
+	eperm = 0x00000001
+	epipe = 0x00000020
+	erange = 0x00000022
+	erofs = 0x0000001e
+	espipe = 0x0000001d
+	esrch = 0x00000003
+	etxtbsy = 0x0000001a
+	exdev = 0x00000012
+}
+
+pub enum Mm_prot {
+	prot_read = 0x1
+	prot_write = 0x2
+	prot_exec = 0x4
+	prot_none = 0x0
+	prot_growsdown = 0x01000000
+	prot_growsup = 0x02000000
+}
+
+pub enum Map_flags {
+	map_shared = 0x01
+	map_private = 0x02
+	map_shared_validate = 0x03
+	map_type = 0x0f
+	map_fixed = 0x10
+	map_file = 0x00
+	map_anonymous = 0x20
+	map_huge_shift = 26
+	map_huge_mask = 0x3f
+}
+
+fn sys_call0(scn u64) u64 {
+	res := u64(0)
+	asm amd64 {
+		syscall
+		; =a (res)
+		; a (scn)
+	}
+	return res
+}
+
+fn sys_call1(scn u64, arg1 u64) u64 {
+	res := u64(0)
+	asm amd64 {
+		syscall
+		; =a (res)
+		; a (scn)
+		  D (arg1)
+	}
+	return res
+}
+
+fn sys_call2(scn u64, arg1 u64, arg2 u64) u64 {
+	res := u64(0)
+	asm amd64 {
+		syscall
+		; =a (res)
+		; a (scn)
+		  D (arg1)
+		  S (arg2)
+	}
+	return res
+}
+
+fn sys_call3(scn u64, arg1 u64, arg2 u64, arg3 u64) u64 {
+	res := u64(0)
+	asm amd64 {
+		syscall
+		; =a (res)
+		; a (scn)
+		  D (arg1)
+		  S (arg2)
+		  d (arg3)
+	}
+	return res
+}
+
+fn sys_call4(scn u64, arg1 u64, arg2 u64, arg3 u64, arg4 u64) u64 {
+	res := u64(0)
+	asm amd64 {
+		mov r10, arg4
+		syscall
+		; =a (res)
+		; a (scn)
+		  D (arg1)
+		  S (arg2)
+		  d (arg3)
+		  r (arg4)
+		; r10
+	}
+	return res
+}
+
+fn sys_call5(scn u64, arg1 u64, arg2 u64, arg3 u64, arg4 u64, arg5 u64) u64 {
+	res := u64(0)
+	asm amd64 {
+		mov r10, arg4
+		mov r8, arg5
+		syscall
+		; =a (res)
+		; a (scn)
+		  D (arg1)
+		  S (arg2)
+		  d (arg3)
+		  r (arg4)
+		  r (arg5)
+		; r10
+		  r8
+	}
+	return res
+}
+
+fn sys_call6(scn u64, arg1 u64, arg2 u64, arg3 u64, arg4 u64, arg5 u64, arg6 u64) u64 {
+	res := u64(0)
+	asm amd64 {
+		mov r10, arg4
+		mov r8, arg5
+		mov r9, arg6
+		syscall
+		; =a (res)
+		; a (scn)
+		  D (arg1)
+		  S (arg2)
+		  d (arg3)
+		  r (arg4)
+		  r (arg5)
+		  r (arg6)
+		; r10
+		  r8
+		  r9
+	}
+	return res
+}
+
+fn split_int_errno(rc_in u64) (i64, Errno) {
+	rc := i64(rc_in)
+	if rc < 0 {
+		return i64(-1), Errno(-rc)
+	}
+	return rc, Errno.enoerror
+}
+
+// 0 sys_read unsigned int fd char *buf size_t count
+pub fn sys_read(fd i64, buf &byte, count u64) (i64, Errno) {
+	return split_int_errno(sys_call3(0, u64(fd), u64(buf), count))
+}
+
+// 1 sys_write unsigned int fd, const char *buf, size_t count
+pub fn sys_write(fd i64, buf &byte, count u64) (i64, Errno) {
+	return split_int_errno(sys_call3(1, u64(fd), u64(buf), count))
+}
+
+pub fn sys_open(filename &byte, flags i64, mode int) (i64, Errno) {
+	// 2 sys_open  const char *filename  int flags int mode
+	return split_int_errno(sys_call3(2, u64(filename), u64(flags), u64(mode)))
+}
+
+pub fn sys_close(fd i64) Errno {
+	// 3 sys_close unsigned int fd
+	return Errno(-i64(sys_call1(3, u64(fd))))
+}
+
+// 9 sys_mmap unsigned long addr  unsigned long len unsigned long prot  unsigned long flags unsigned long fd  unsigned long off
+pub fn sys_mmap(addr &byte, len u64, prot Mm_prot, flags Map_flags, fildes u64, off u64) (&byte, Errno) {
+	rc := sys_call6(9, u64(addr), len, u64(prot), u64(flags), fildes, off)
+	a, e := split_int_errno(rc)
+	return &byte(a), e
+}
+
+pub fn sys_munmap(addr voidptr, len u64) Errno {
+	// 11 sys_munmap  unsigned long addr  size_t len
+	return Errno(-sys_call2(11, u64(addr), len))
+}
+
+// 22  sys_pipe  int *filedes
+pub fn sys_pipe(filedes &int) Errno {
+	return Errno(sys_call1(22, u64(filedes)))
+}
+
+// 24 sys_sched_yield
+pub fn sys_sched_yield() Errno {
+	return Errno(sys_call0(24))
+}
+
+pub fn sys_madvise(addr voidptr, len u64, advice int) Errno {
+	// 28 sys_madvise unsigned long start size_t len_in int behavior
+	return Errno(sys_call3(28, u64(addr), len, u64(advice)))
+}
+
+// 39 sys_getpid
+pub fn sys_getpid() int {
+	return int(sys_call0(39))
+}
+
+// 57 sys_fork
+pub fn sys_fork() int {
+	return int(sys_call0(57))
+}
+
+// 58 sys_vfork
+pub fn sys_vfork() int {
+	return int(sys_call0(58))
+}
+
+// 33  sys_dup2  unsigned int oldfd  unsigned int newfd
+pub fn sys_dup2(oldfd int, newfd int) (i64, Errno) {
+	return split_int_errno(sys_call2(33, u64(oldfd), u64(newfd)))
+}
+
+// 59  sys_execve  const char *filename  const char *const argv[]  const char *const envp[]
+// pub fn sys_execve(filename byteptr, argv []byteptr, envp []byteptr) int {
+//  return sys_call3(59, filename, argv, envp)
+//}
+
+// 60 sys_exit  int error_code
+pub fn sys_exit(ec int) {
+	sys_call1(60, u64(ec))
+}
+
+// 102 sys_getuid
+pub fn sys_getuid() int {
+	return int(sys_call0(102))
+}
+
+// 247 sys_waitid  int which pid_t upid  struct siginfo *infop int options struct rusage *ru
+pub fn sys_waitid(which Wi_which, pid int, infop &int, options int, ru voidptr) Errno {
+	return Errno(sys_call5(247, u64(which), u64(pid), u64(infop), u64(options), u64(ru)))
+}
+
+/*
+A few years old, but still relevant
+https://blog.rchapman.org/posts/Linux_System_Call_Table_for_x86_64/
+
+>0 sys_read unsigned int fd char *buf size_t count
+>1 sys_write unsigned int fd const char *buf size_t count
+>2 sys_open  const char *filename  int flags int mode
+>3 sys_close unsigned int fd
+4 sys_stat  const char *filename  struct stat *statbuf
+5 sys_fstat unsigned int fd struct stat *statbuf
+6 sys_lstat fconst char *filename struct stat *statbuf
+7 sys_poll  struct poll_fd *ufds  unsigned int nfds long timeout_msecs
+8 sys_lseek unsigned int fd off_t offset  unsigned int origin
+>9 sys_mmap unsigned long addr  unsigned long len unsigned long prot  unsigned long flags unsigned long fd  unsigned long off
+10  sys_mprotect  unsigned long start size_t len  unsigned long prot
+>11 sys_munmap  unsigned long addr  size_t len
+12  sys_brk unsigned long brk
+13  sys_rt_sigaction  int sig const struct sigaction *act struct sigaction *oact  size_t sigsetsize
+14  sys_rt_sigprocmask  int how sigset_t *nset  sigset_t *oset  size_t sigsetsize
+15  sys_rt_sigreturn  unsigned long __unused
+16  sys_ioctl unsigned int fd unsigned int cmd  unsigned long arg
+17  sys_pread64 unsigned long fd  char *buf size_t count  loff_t pos
+18  sys_pwrite64  unsigned int fd const char *buf size_t count  loff_t pos
+19  sys_readv unsigned long fd  const struct iovec *vec unsigned long vlen
+20  sys_writev  unsigned long fd  const struct iovec *vec unsigned long vlen
+21  sys_access  const char *filename  int mode
+>22  sys_pipe  int *filedes
+23  sys_select  int n fd_set *inp fd_set *outp  fd_set*exp  struct timeval *tvp
+>24 sys_sched_yield
+25  sys_mremap  unsigned long addr  unsigned long old_len unsigned long new_len unsigned long flags unsigned long new_addr
+26  sys_msync unsigned long start size_t len  int flags
+27  sys_mincore unsigned long start size_t len  unsigned char *vec
+>28 sys_madvise unsigned long start size_t len_in int behavior
+29  sys_shmget  key_t key size_t size int shmflg
+30  sys_shmat int shmid char *shmaddr int shmflg
+31  sys_shmctl  int shmid int cmd struct shmid_ds *buf
+32  sys_dup unsigned int fildes
+33  sys_dup2  unsigned int oldfd  unsigned int newfd
+34  sys_pause
+35  sys_nanosleep struct timespec *rqtp struct timespec *rmtp
+36  sys_getitimer int which struct itimerval *value
+37  sys_alarm unsigned int seconds
+38  sys_setitimer int which struct itimerval *value struct itimerval *ovalue
+>39 sys_getpid
+40  sys_sendfile  int out_fd  int in_fd off_t *offset size_t count
+41  sys_socket  int family  int type  int protocol
+42  sys_connect int fd  struct sockaddr *uservaddr  int addrlen
+43  sys_accept  int fd  struct sockaddr *upeer_sockaddr int *upeer_addrlen
+44  sys_sendto  int fd  void *buff  size_t len  unsigned flags  struct sockaddr *addr int addr_len
+45  sys_recvfrom  int fd  void *ubuf  size_t size unsigned flags  struct sockaddr *addr int *addr_len
+46  sys_sendmsg int fd  struct msghdr *msg  unsigned flags
+47  sys_recvmsg int fd  struct msghdr *msg  unsigned int flags
+48  sys_shutdown  int fd  int how
+49  sys_bind  int fd  struct sokaddr *umyaddr int addrlen
+50  sys_listen  int fd  int backlog
+51  sys_getsockname int fd  struct sockaddr *usockaddr  int *usockaddr_len
+52  sys_getpeername int fd  struct sockaddr *usockaddr  int *usockaddr_len
+53  sys_socketpair  int family  int type  int protocol  int *usockvec
+54  sys_setsockopt  int fd  int level int optname char *optval  int optlen
+55  sys_getsockopt  int fd  int level int optname char *optval  int *optlen
+56  sys_clone unsigned long clone_flags unsigned long newsp void *parent_tid  void *child_tid
+>57 sys_fork
+>58 sys_vfork
+>59 sys_execve  const char *filename  const char *const argv[]  const char *const envp[]
+>60 sys_exit  int error_code
+61  sys_wait4 pid_t upid  int *stat_addr  int options struct rusage *ru
+62  sys_kill  pid_t pid int sig
+63  sys_uname struct old_utsname *name
+64  sys_semget  key_t key int nsems int semflg
+65  sys_semop int semid struct sembuf *tsops  unsigned nsops
+66  sys_semctl  int semid int semnum  int cmd union semun arg
+67  sys_shmdt char *shmaddr
+68  sys_msgget  key_t key int msgflg
+69  sys_msgsnd  int msqid struct msgbuf *msgp size_t msgsz  int msgflg
+70  sys_msgrcv  int msqid struct msgbuf *msgp size_t msgsz  long msgtyp int msgflg
+71  sys_msgctl  int msqid int cmd struct msqid_ds *buf
+72  sys_fcntl unsigned int fd unsigned int cmd  unsigned long arg
+73  sys_flock unsigned int fd unsigned int cmd
+74  sys_fsync unsigned int fd
+75  sys_fdatasync unsigned int fd
+76  sys_truncate  const char *path  long length
+77  sys_ftruncate unsigned int fd unsigned long length
+78  sys_getdents  unsigned int fd struct linux_dirent *dirent unsigned int count
+79  sys_getcwd  char *buf unsigned long size
+80  sys_chdir const char *filename
+81  sys_fchdir  unsigned int fd
+82  sys_rename  const char *oldname const char *newname
+83  sys_mkdir const char *pathname  int mode
+84  sys_rmdir const char *pathname
+85  sys_creat const char *pathname  int mode
+86  sys_link  const char *oldname const char *newname
+87  sys_unlink  const char *pathname
+88  sys_symlink const char *oldname const char *newname
+89  sys_readlink  const char *path  char *buf int bufsiz
+90  sys_chmod const char *filename  mode_t mode
+91  sys_fchmod  unsigned int fd mode_t mode
+92  sys_chown const char *filename  uid_t user  gid_t group
+93  sys_fchown  unsigned int fd uid_t user  gid_t group
+94  sys_lchown  const char *filename  uid_t user  gid_t group
+95  sys_umask int mask
+96  sys_gettimeofday  struct timeval *tv  struct timezone *tz
+97  sys_getrlimit unsigned int resource struct rlimit *rlim
+98  sys_getrusage int who struct rusage *ru
+99  sys_sysinfo struct sysinfo *info
+100 sys_times struct sysinfo *info
+101 sys_ptrace  long request  long pid  unsigned long addr  unsigned long data
+>102 sys_getuid
+103 sys_syslog  int type  char *buf int len
+104 sys_getgid
+105 sys_setuid  uid_t uid
+106 sys_setgid  gid_t gid
+107 sys_geteuid
+108 sys_getegid
+109 sys_setpgid pid_t pid pid_t pgid
+110 sys_getppid
+111 sys_getpgrp
+112 sys_setsid
+113 sys_setreuid  uid_t ruid  uid_t euid
+114 sys_setregid  gid_t rgid  gid_t egid
+115 sys_getgroups int gidsetsize  gid_t *grouplist
+116 sys_setgroups int gidsetsize  gid_t *grouplist
+117 sys_setresuid uid_t *ruid uid_t *euid uid_t *suid
+118 sys_getresuid uid_t *ruid uid_t *euid uid_t *suid
+119 sys_setresgid gid_t rgid  gid_t egid  gid_t sgid
+120 sys_getresgid gid_t *rgid gid_t *egid gid_t *sgid
+121 sys_getpgid pid_t pid
+122 sys_setfsuid  uid_t uid
+123 sys_setfsgid  gid_t gid
+124 sys_getsid  pid_t pid
+125 sys_capget  cap_user_header_t header  cap_user_data_t dataptr
+126 sys_capset  cap_user_header_t header  const cap_user_data_t data
+127 sys_rt_sigpending sigset_t *set size_t sigsetsize
+128 sys_rt_sigtimedwait const sigset_t *uthese  siginfo_t *uinfo  const struct timespec *uts  size_t sigsetsize
+129 sys_rt_sigqueueinfo pid_t pid int sig siginfo_t *uinfo
+130 sys_rt_sigsuspend sigset_t *unewset size_t sigsetsize
+131 sys_sigaltstack const stack_t *uss  stack_t *uoss
+132 sys_utime char *filename  struct utimbuf *times
+133 sys_mknod const char *filename  umode_t mode  unsigned dev
+134 sys_uselib  NOT IMPLEMENTED
+135 sys_personality unsigned int personality
+136 sys_ustat unsigned dev  struct ustat *ubuf
+137 sys_statfs  const char *pathname  struct statfs *buf
+138 sys_fstatfs unsigned int fd struct statfs *buf
+139 sys_sysfs int option  unsigned long arg1  unsigned long arg2
+140 sys_getpriority int which int who
+141 sys_setpriority int which int who int niceval
+142 sys_sched_setparam  pid_t pid struct sched_param *param
+143 sys_sched_getparam  pid_t pid struct sched_param *param
+144 sys_sched_setscheduler  pid_t pid int policy  struct sched_param *param
+145 sys_sched_getscheduler  pid_t pid
+146 sys_sched_get_priority_max  int policy
+147 sys_sched_get_priority_min  int policy
+148 sys_sched_rr_get_interval pid_t pid struct timespec *interval
+149 sys_mlock unsigned long start size_t len
+150 sys_munlock unsigned long start size_t len
+151 sys_mlockall  int flags
+152 sys_munlockall
+153 sys_vhangup
+154 sys_modify_ldt  int func  void *ptr unsigned long bytecount
+155 sys_pivot_root  const char *new_root  const char *put_old
+156 sys__sysctl struct __sysctl_args *args
+157 sys_prctl int option  unsigned long arg2  unsigned long arg3  unsigned long arg4    unsigned long arg5
+158 sys_arch_prctl  struct task_struct *task  int code  unsigned long *addr
+159 sys_adjtimex  struct timex *txc_p
+160 sys_setrlimit unsigned int resource struct rlimit *rlim
+161 sys_chroot  const char *filename
+162 sys_sync
+163 sys_acct  const char *name
+164 sys_settimeofday  struct timeval *tv  struct timezone *tz
+165 sys_mount char *dev_name  char *dir_name  char *type  unsigned long flags void *data
+166 sys_umount2 const char *target  int flags
+167 sys_swapon  const char *specialfile int swap_flags
+168 sys_swapoff const char *specialfile
+169 sys_reboot  int magic1  int magic2  unsigned int cmd  void *arg
+170 sys_sethostname char *name  int len
+171 sys_setdomainname char *name  int len
+172 sys_iopl  unsigned int level  struct pt_regs *regs
+173 sys_ioperm  unsigned long from  unsigned long num int turn_on
+174 sys_create_module REMOVED IN Linux 2.6
+175 sys_init_module void *umod  unsigned long len const char *uargs
+176 sys_delete_module const chat *name_user unsigned int flags
+177 sys_get_kernel_syms REMOVED IN Linux 2.6
+178 sys_query_module  REMOVED IN Linux 2.6
+179 sys_quotactl  unsigned int cmd  const char *special qid_t id  void *addr
+180 sys_nfsservctl  NOT IMPLEMENTED
+181 sys_getpmsg NOT IMPLEMENTED
+182 sys_putpmsg NOT IMPLEMENTED
+183 sys_afs_syscall NOT IMPLEMENTED
+184 sys_tuxcall NOT IMPLEMENTED
+185 sys_security  NOT IMPLEMENTED
+186 sys_gettid
+187 sys_readahead int fd  loff_t offset size_t count
+188 sys_setxattr  const char *pathname  const char *name  const void *value size_t size int flags
+189 sys_lsetxattr const char *pathname  const char *name  const void *value size_t size int flags
+190 sys_fsetxattr int fd  const char *name  const void *value size_t size int flags
+191 sys_getxattr  const char *pathname  const char *name  void *value size_t size
+192 sys_lgetxattr const char *pathname  const char *name  void *value size_t size
+193 sys_fgetxattr int fd  const har *name void *value size_t size
+194 sys_listxattr const char *pathname  char *list  size_t size
+195 sys_llistxattr  const char *pathname  char *list  size_t size
+196 sys_flistxattr  int fd  char *list  size_t size
+197 sys_removexattr const char *pathname  const char *name
+198 sys_lremovexattr  const char *pathname  const char *name
+199 sys_fremovexattr  int fd  const char *name
+200 sys_tkill pid_t pid ing sig
+201 sys_time  time_t *tloc
+202 sys_futex u32 *uaddr  int op  u32 val struct timespec *utime  u32 *uaddr2 u32 val3
+203 sys_sched_setaffinity pid_t pid unsigned int len  unsigned long *user_mask_ptr
+204 sys_sched_getaffinity pid_t pid unsigned int len  unsigned long *user_mask_ptr
+205 sys_set_thread_area NOT IMPLEMENTED. Use arch_prctl
+206 sys_io_setup  unsigned nr_events  aio_context_t *ctxp
+207 sys_io_destroy  aio_context_t ctx
+208 sys_io_getevents  aio_context_t ctx_id  long min_nr long nr struct io_event *events
+209 sys_io_submit aio_context_t ctx_id  long nr struct iocb **iocbpp
+210 sys_io_cancel aio_context_t ctx_id  struct iocb *iocb struct io_event *result
+211 sys_get_thread_area NOT IMPLEMENTED. Use arch_prctl
+212 sys_lookup_dcookie  u64 cookie64  long buf  long len
+213 sys_epoll_create  int size
+214 sys_epoll_ctl_old NOT IMPLEMENTED
+215 sys_epoll_wait_old  NOT IMPLEMENTED
+216 sys_remap_file_pages  unsigned long start unsigned long size  unsigned long prot  unsigned long pgoff unsigned long flags
+217 sys_getdents64  unsigned int fd struct linux_dirent64 *dirent unsigned int count
+218 sys_set_tid_address int *tidptr
+219 sys_restart_syscall
+220 sys_semtimedop  int semid struct sembuf *tsops  unsigned nsops  const struct timespec *timeout
+221 sys_fadvise64 int fd  loff_t offset size_t len  int advice
+222 sys_timer_create  const clockid_t which_clock struct sigevent *timer_event_spec timer_t *created_timer_id
+223 sys_timer_settime timer_t timer_id  int flags const struct itimerspec *new_setting  struct itimerspec *old_setting
+224 sys_timer_gettime timer_t timer_id  struct itimerspec *setting
+225 sys_timer_getoverrun  timer_t timer_id
+226 sys_timer_delete  timer_t timer_id
+227 sys_clock_settime const clockid_t which_clock const struct timespec *tp
+228 sys_clock_gettime const clockid_t which_clock struct timespec *tp
+229 sys_clock_getres  const clockid_t which_clock struct timespec *tp
+230 sys_clock_nanosleep const clockid_t which_clock int flags const struct timespec *rqtp struct timespec *rmtp
+231 sys_exit_group  int error_code
+232 sys_epoll_wait  int epfd  struct epoll_event *events  int maxevents int timeout
+233 sys_epoll_ctl int epfd  int op  int fd  struct epoll_event *event
+234 sys_tgkill  pid_t tgid  pid_t pid int sig
+235 sys_utimes  char *filename  struct timeval *utimes
+236 sys_vserver NOT IMPLEMENTED
+237 sys_mbind unsigned long start unsigned long len unsigned long mode  unsigned long *nmask  unsigned long maxnode unsigned flags
+238 sys_set_mempolicy int mode  unsigned long *nmask  unsigned long maxnode
+239 sys_get_mempolicy int *policy unsigned long *nmask  unsigned long maxnode unsigned long addr  unsigned long flags
+240 sys_mq_open const char *u_name  int oflag mode_t mode struct mq_attr *u_attr
+241 sys_mq_unlink const char *u_name
+242 sys_mq_timedsend  mqd_t mqdes const char *u_msg_ptr size_t msg_len  unsigned int msg_prio const stuct timespec *u_abs_timeout
+243 sys_mq_timedreceive mqd_t mqdes char *u_msg_ptr size_t msg_len  unsigned int *u_msg_prio  const struct timespec *u_abs_timeout
+244 sys_mq_notify mqd_t mqdes const struct sigevent *u_notification
+245 sys_mq_getsetattr mqd_t mqdes const struct mq_attr *u_mqstat  struct mq_attr *u_omqstat
+246 sys_kexec_load  unsigned long entry unsigned long nr_segments struct kexec_segment *segments  unsigned long flags
+>247 sys_waitid  int which pid_t upid  struct siginfo *infop int options struct rusage *ru
+248 sys_add_key const char *_type const char *_description  const void *_payload  size_t plen
+249 sys_request_key const char *_type const char *_description  const char *_callout_info key_serial_t destringid
+250 sys_keyctl  int option  unsigned long arg2  unsigned long arg3  unsigned long arg4  unsigned long arg5
+251 sys_ioprio_set  int which int who int ioprio
+252 sys_ioprio_get  int which int who
+253 sys_inotify_init
+254 sys_inotify_add_watch int fd  const char *pathname  u32 mask
+255 sys_inotify_rm_watch  int fd  __s32 wd
+256 sys_migrate_pages pid_t pid unsigned long maxnode const unsigned long *old_nodes  const unsigned long *new_nodes
+257 sys_openat  int dfd const char *filename  int flags int mode
+258 sys_mkdirat int dfd const char *pathname  int mode
+259 sys_mknodat int dfd const char *filename  int mode  unsigned dev
+260 sys_fchownat  int dfd const char *filename  uid_t user  gid_t group int flag
+261 sys_futimesat int dfd const char *filename  struct timeval *utimes
+262 sys_newfstatat  int dfd const char *filename  struct stat *statbuf  int flag
+263 sys_unlinkat  int dfd const char *pathname  int flag
+264 sys_renameat  int oldfd const char *oldname int newfd const char *newname
+265 sys_linkat  int oldfd const char *oldname int newfd const char *newname int flags
+266 sys_symlinkat const char *oldname int newfd const char *newname
+267 sys_readlinkat  int dfd const char *pathname  char *buf int bufsiz
+268 sys_fchmodat  int dfd const char *filename  mode_t mode
+269 sys_faccessat int dfd const char *filename  int mode
+270 sys_pselect6  int n fd_set *inp fd_set *outp  fd_set *exp struct timespec *tsp  void *sig
+271 sys_ppoll struct pollfd *ufds unsigned int nfds struct timespec *tsp  const sigset_t *sigmask size_t sigsetsize
+272 sys_unshare unsigned long unshare_flags
+273 sys_set_robust_list struct robust_list_head *head size_t len
+274 sys_get_robust_list int pid struct robust_list_head **head_ptr  size_t *len_ptr
+275 sys_splice  int fd_in loff_t *off_in  int fd_out  loff_t *off_out size_t len  unsigned int flags
+276 sys_tee int fdin  int fdout size_t len  unsigned int flags
+277 sys_sync_file_range long fd loff_t offset loff_t bytes  long flags
+278 sys_vmsplice  int fd  const struct iovec *iov unsigned long nr_segs unsigned int flags
+279 sys_move_pages  pid_t pid unsigned long nr_pages  const void **pages  const int *nodes  int *status int flags
+280 sys_utimensat int dfd const char *filename  struct timespec *utimes int flags
+281 sys_epoll_pwait int epfd  struct epoll_event *events  int maxevents int timeout const sigset_t *sigmask size_t sigsetsize
+282 sys_signalfd  int ufd sigset_t *user_mask size_t sizemask
+283 sys_timerfd_create  int clockid int flags
+284 sys_eventfd unsigned int count
+285 sys_fallocate long fd long mode loff_t offset loff_t len
+286 sys_timerfd_settime int ufd int flags const struct itimerspec *utmr struct itimerspec *otmr
+287 sys_timerfd_gettime int ufd struct itimerspec *otmr
+288 sys_accept4 int fd  struct sockaddr *upeer_sockaddr int *upeer_addrlen  int flags
+289 sys_signalfd4 int ufd sigset_t *user_mask size_t sizemask int flags
+290 sys_eventfd2  unsigned int count  int flags
+291 sys_epoll_create1 int flags
+292 sys_dup3  unsigned int oldfd  unsigned int newfd  int flags
+293 sys_pipe2 int *filedes  int flags
+294 sys_inotify_init1 int flags
+295 sys_preadv  unsigned long fd  const struct iovec *vec unsigned long vlen  unsigned long pos_l unsigned long pos_h
+296 sys_pwritev unsigned long fd  const struct iovec *vec unsigned long vlen  unsigned long pos_l unsigned long pos_h
+297 sys_rt_tgsigqueueinfo pid_t tgid  pid_t pid int sig siginfo_t *uinfo
+298 sys_perf_event_open struct perf_event_attr *attr_uptr pid_t pid int cpu int group_fd  unsigned long flags
+299 sys_recvmmsg  int fd  struct msghdr *mmsg unsigned int vlen unsigned int flags  struct timespec *timeout
+300 sys_fanotify_init unsigned int flags  unsigned int event_f_flags
+301 sys_fanotify_mark long fanotify_fd  long flags  __u64 mask  long dfd  long pathname
+302 sys_prlimit64 pid_t pid unsigned int resource const struct rlimit64 *new_rlim struct rlimit64 *old_rlim
+303 sys_name_to_handle_at int dfd const char *name  struct file_handle *handle  int *mnt_id int flag
+304 sys_open_by_handle_at int dfd const char *name  struct file_handle *handle  int *mnt_id int flags
+305 sys_clock_adjtime clockid_t which_clock struct timex *tx
+306 sys_syncfs  int fd
+307 sys_sendmmsg  int fd  struct mmsghdr *mmsg  unsigned int vlen unsigned int flags
+308 sys_setns int fd  int nstype
+309 sys_getcpu  unsigned *cpup  unsigned *nodep struct getcpu_cache *unused
+310 sys_process_vm_readv  pid_t pid const struct iovec *lvec  unsigned long liovcnt const struct iovec *rvec  unsigned long riovcnt unsigned long flags
+311 sys_process_vm_writev pid_t pid const struct iovec *lvec  unsigned long liovcnt const struct iovcc *rvec  unsigned long riovcnt unsigned long flags
+312 sys_kcmp  pid_t pid1  pid_t pid2  int type  unsigned long idx1  unsigned long idx2
+313 sys_finit_module  int fd  const char __user *uargs  int flags
+314 sys_sched_setattr pid_t pid struct sched_attr __user *attr  unsigned int flags
+315 sys_sched_getattr pid_t pid struct sched_attr __user *attr  unsigned int size unsigned int flags
+316 sys_renameat2 int olddfd  const char __user *oldname  int newdfd  const char __user *newname  unsigned int flags
+317 sys_seccomp unsigned int op unsigned int flags  const char __user *uargs
+318 sys_getrandom char __user *buf  size_t count  unsigned int flags
+319 sys_memfd_create  const char __user *uname_ptr  unsigned int flags
+320 sys_kexec_file_load int kernel_fd int initrd_fd unsigned long cmdline_len const char __user *cmdline_ptr  unsigned long flags
+321 sys_bpf int cmd union bpf_attr *attr  unsigned int size
+322 stub_execveat int dfd const char __user *filename const char __user *const __user *argv const char __user *const __user *envp int flags
+323 userfaultfd int flags
+324 membarrier  int cmd int flags
+325 mlock2  unsigned long start size_t len  int flags
+326 copy_file_range int fd_in loff_t __user *off_in int fd_out  loff_t __user * off_out size_t len  unsigned int flags
+327 preadv2 unsigned long fd  const struct iovec __user *vec  unsigned long vlen  unsigned long pos_l unsigned long pos_h int flags
+328 pwritev2  unsigned long fd  const struct iovec __user *vec  unsigned long vlen  unsigned long pos_l unsigned long pos_h int flags
+*/
diff --git a/v_windows/v/old/vlib/builtin/linux_bare/old/mm_bare.v b/v_windows/v/old/vlib/builtin/linux_bare/old/mm_bare.v
new file mode 100644
index 0000000..cee5f99
--- /dev/null
+++ b/v_windows/v/old/vlib/builtin/linux_bare/old/mm_bare.v
@@ -0,0 +1,58 @@
+module builtin
+
+const (
+	mem_prot  = Mm_prot(int(Mm_prot.prot_read) | int(Mm_prot.prot_write))
+	mem_flags = Map_flags(int(Map_flags.map_private) | int(Map_flags.map_anonymous))
+	page_size = u64(Linux_mem.page_size)
+)
+
+pub fn mm_pages(size u64) u32 {
+	pages := (size + u64(4) + page_size) / page_size
+	return u32(pages)
+}
+
+pub fn mm_alloc(size u64) (&byte, Errno) {
+	pages := mm_pages(size)
+	n_bytes := u64(pages * u32(Linux_mem.page_size))
+
+	a, e := sys_mmap(0, n_bytes, mem_prot, mem_flags, -1, 0)
+	if e == .enoerror {
+		mut ap := &int(a)
+		*ap = pages
+		return &byte(a + 4), e
+	}
+	return &byte(0), e
+}
+
+pub fn mm_free(addr &byte) Errno {
+	ap := &int(addr - 4)
+	size := u64(*ap) * u64(Linux_mem.page_size)
+
+	return sys_munmap(ap, size)
+}
+
+pub fn mem_copy(dest0 voidptr, src0 voidptr, n int) voidptr {
+	mut dest := &byte(dest0)
+	src := &byte(src0)
+	for i in 0 .. n {
+		dest[i] = src[i]
+	}
+	return dest0
+}
+
+[unsafe]
+pub fn malloc(n int) &byte {
+	if n < 0 {
+		panic('malloc(<0)')
+	}
+
+	ptr, e := mm_alloc(u64(n))
+	assert e == .enoerror
+	assert !isnil(ptr)
+	return ptr
+}
+
+[unsafe]
+pub fn free(ptr voidptr) {
+	assert mm_free(ptr) == .enoerror
+}
diff --git a/v_windows/v/old/vlib/builtin/linux_bare/old/string_bare.v b/v_windows/v/old/vlib/builtin/linux_bare/old/string_bare.v
new file mode 100644
index 0000000..8f7edfc
--- /dev/null
+++ b/v_windows/v/old/vlib/builtin/linux_bare/old/string_bare.v
@@ -0,0 +1,150 @@
+module builtin
+
+pub struct string {
+pub:
+	str &byte
+	len int
+}
+
+pub fn strlen(s &byte) int {
+	mut i := 0
+	for ; s[i] != 0; i++ {}
+	return i
+}
+
+pub fn tos(s &byte, len int) string {
+	if s == 0 {
+		panic('tos(): nil string')
+	}
+	return string{
+		str: s
+		len: len
+	}
+}
+
+fn (s string) add(a string) string {
+	new_len := a.len + s.len
+	mut res := string{
+		len: new_len
+		str: malloc(new_len + 1)
+	}
+	for j in 0 .. s.len {
+		res[j] = s[j]
+	}
+	for j in 0 .. a.len {
+		res[s.len + j] = a[j]
+	}
+	res[new_len] = 0 // V strings are not null terminated, but just in case
+	return res
+}
+
+/*
+pub fn tos_clone(s byteptr) string {
+	if s == 0 {
+		panic('tos: nil string')
+	}
+	return tos2(s).clone()
+}
+*/
+
+// Same as `tos`, but calculates the length. Called by `string(bytes)` casts.
+// Used only internally.
+pub fn tos2(s &byte) string {
+	if s == 0 {
+		panic('tos2: nil string')
+	}
+	return string{
+		str: s
+		len: strlen(s)
+	}
+}
+
+pub fn tos3(s &char) string {
+	if s == 0 {
+		panic('tos3: nil string')
+	}
+	return string{
+		str: &byte(s)
+		len: strlen(&byte(s))
+	}
+}
+
+pub fn string_eq(s1 string, s2 string) bool {
+	if s1.len != s2.len {
+		return false
+	}
+	for i in 0 .. s1.len {
+		if s1[i] != s2[i] {
+			return false
+		}
+	}
+	return true
+}
+
+pub fn string_ne(s1 string, s2 string) bool {
+	return !string_eq(s1, s2)
+}
+
+pub fn i64_tos(buf &byte, len int, n0 i64, base int) string {
+	if base < 2 {
+		panic('base must be >= 2')
+	}
+	if base > 36 {
+		panic('base must be <= 36')
+	}
+
+	mut b := tos(buf, len)
+	mut i := len - 1
+
+	mut n := n0
+	neg := n < 0
+	if neg {
+		n = -n
+	}
+
+	b[i--] = 0
+
+	for {
+		c := (n % base) + 48
+		b[i--] = if c > 57 { c + 7 } else { c }
+		if i < 0 {
+			panic('buffer to small')
+		}
+		n /= base
+		if n < 1 {
+			break
+		}
+	}
+	if neg {
+		if i < 0 {
+			panic('buffer to small')
+		}
+		b[i--] = 45
+	}
+	offset := i + 1
+	b.str = b.str + offset
+	b.len -= (offset + 1)
+	return b
+}
+
+pub fn i64_str(n0 i64, base int) string {
+	buf := malloc(80)
+	return i64_tos(buf, 79, n0, base)
+}
+
+pub fn ptr_str(ptr voidptr) string {
+	buf := [16]byte{}
+	hex := i64_tos(buf, 15, i64(ptr), 16)
+	res := '0x' + hex
+	return res
+}
+
+pub fn (a string) clone() string {
+	mut b := string{
+		len: a.len
+		str: malloc(a.len + 1)
+	}
+	mem_copy(b.str, a.str, a.len)
+	b[a.len] = 0
+	return b
+}
diff --git a/v_windows/v/old/vlib/builtin/linux_bare/old/syscallwrapper_test.v b/v_windows/v/old/vlib/builtin/linux_bare/old/syscallwrapper_test.v
new file mode 100644
index 0000000..cbaf355
--- /dev/null
+++ b/v_windows/v/old/vlib/builtin/linux_bare/old/syscallwrapper_test.v
@@ -0,0 +1,27 @@
+import os
+
+fn test_syscallwrappers() {
+	if true {
+		return
+	}
+	$if linux {
+		$if x64 {
+			exe := os.executable()
+			vdir := os.dir(exe)
+			if vdir.len > 1 {
+				dot_checks := vdir + '/.checks'
+				assert os.is_dir(dot_checks)
+
+				os.chdir(dot_checks)
+				checks_v := 'checks.v'
+				assert os.exists(checks_v)
+				rc := os.execute_or_exit('v run $checks_v')
+				assert rc.exit_code == 0
+				assert !rc.output.contains('V panic: An assertion failed.')
+				assert !rc.output.contains('failed')
+			} else {
+				panic("Can't find test directory")
+			}
+		}
+	}
+}
-- 
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