ref: ae65514eb5853c11042cdeba8bc408b68798c59c
dir: /support/syscall-gen/specials+linux-x64.frag/
/* getting to the os */
extern const syscall : (sc:scno, args:... -> int64)
extern const sigreturn : (-> void)
/* process management */
const exit : (status:int -> void)
const exit_group : (status:int -> void)
const getpid : ( -> pid)
const kill : (pid:pid, sig:int64 -> int64)
const fork : (-> pid)
/* FIXME: where the fuck is 'struct pt_reg' defined?? */
const clone : (flags : cloneopt, stk : byte#, ptid : pid#, ctid : pid#, ptreg : byte# -> pid)
extern const fnclone : ( flags : cloneopt, \
stk : byte#, \
ptid : pid#, \
tls : byte#, \
ctid : pid#, \
ptreg : byte#, \
fn : void# /* we need a raw pointer */ \
-> pid)
const wait4 : (pid:pid, loc:int32#, opt : int64, usage:rusage# -> int64)
const waitpid : (pid:pid, loc:int32#, opt : int64 -> int64)
const execv : (cmd : byte[:], args : byte[:][:] -> int64)
const execve : (cmd : byte[:], args : byte[:][:], env : byte[:][:] -> int64)
/* wrappers to extract wait status */
const waitstatus : (st : int32 -> waitstatus)
/* file manipulation */
const open : (path:byte[:], opts:fdopt -> fd)
const openmode : (path:byte[:], opts:fdopt, mode:int64 -> fd)
const close : (fd:fd -> int64)
const rename : (from : byte[:], to : byte[:] -> int64)
const creat : (path:byte[:], mode:int64 -> fd)
const unlink : (path:byte[:] -> int)
const readlink : (path:byte[:], buf:byte[:] -> int64)
const read : (fd:fd, buf:byte[:] -> size)
const pread : (fd:fd, buf:byte[:], off : off -> size)
const write : (fd:fd, buf:byte[:] -> size)
const pwrite : (fd:fd, buf:byte[:], off : off -> size)
const lseek : (fd:fd, off:off, whence:whence -> int64)
const stat : (path:byte[:], sb:statbuf# -> int64)
const lstat : (path:byte[:], sb:statbuf# -> int64)
const fstat : (fd:fd, sb:statbuf# -> int64)
const mkdir : (path : byte[:], mode : int64 -> int64)
generic ioctl : (fd:fd, req : int64, arg:@a# -> int64)
const getdents64 : (fd:fd, buf : byte[:] -> int64)
const chdir : (p : byte[:] -> int64)
const getcwd : (buf : byte[:] -> int64)
const sendmsg : (fd:fd, msg:msghdr#, flags:msgflags -> int64)
const recvmsg : (fd:fd, msg:msghdr#, flags:msgflags -> int64)
const fallocate : (fd:fd, mode:fallocmode, off:off, len:off -> int64)
const memfdcreate : (name:byte[:], flags:mfdflags -> fd)
/* signals */
const sigaction : (sig : signo, act : sigaction#, oact : sigaction# -> int)
const sigprocmask : (how : int32, set : sigset#, oset : sigset# -> int)
/* fd stuff */
const pipe : (fds : fd[2]# -> int64)
const dup : (fd : fd -> fd)
const dup2 : (src : fd, dst : fd -> fd)
/* threading */
const futex : (uaddr : int32#, op : futexop, val : int32, \
timeout : timespec#, uaddr2 : int32#, val3 : int32 -> int64)
const semctl : (semid : int, semnum : int, cmd : int, arg : void# -> int)
/* polling */
const epollcreate : (flg : epollflags -> fd) /* actually epoll_create1 */
const epollctl : (epfd : fd, op : int, fd : fd, evt : epollevt# -> int)
const epollwait : (epfd : fd, evts : epollevt[:], timeout : int -> int)
const poll : (pfd : pollfd[:], timeout : int -> int)
/* networking */
const socket : (dom : sockfam, stype : socktype, proto : sockproto -> fd)
const connect : (sock : fd, addr : sockaddr#, len : size -> int)
const accept : (sock : fd, addr : sockaddr#, len : size# -> fd)
const listen : (sock : fd, backlog : int -> int)
const bind : (sock : fd, addr : sockaddr#, len : size -> int)
const setsockopt : (sock : fd, lev : sockproto, opt : sockopt, val : void#, len : size -> int)
const getsockopt : (sock : fd, lev : sockproto, opt : sockopt, val : void#, len : size# -> int)
/* memory mapping */
const munmap : (addr:byte#, len:size -> int64)
const mmap : (addr:byte#, len:size, prot:mprot, flags:mopt, fd:fd, off:off -> byte#)
/* time */
const clock_getres : (clk : clock, ts : timespec# -> int32)
const clock_gettime : (clk : clock, ts : timespec# -> int32)
const clock_settime : (clk : clock, ts : timespec# -> int32)
const nanosleep : (req : timespec#, rem : timespec# -> int32)
/* user/group management */
const getuid : ( -> uint32)
const getgid : ( -> uint32)
const setuid : (uid : uint32 -> int32)
const setgid : (gid : uint32 -> int32)
/* system information */
const uname : (buf : utsname# -> int)
/*
wraps a syscall argument, converting it to 64 bits for the syscall function.
This is the same as casting, but more concise than writing a cast to int64.
*/
generic a = {x : @t; -> (x : uint64)}
/* asm stubs from util.s */
extern const cstring : (str : byte[:] -> byte#)
extern const alloca : (sz : size -> byte#)
/* process management */
const exit = {status; syscall(Sysexit, a(status))}
const exit_group = {status; syscall(Sysexit_group, a(status))}
const getpid = {; -> (syscall(Sysgetpid) : pid)}
const kill = {pid, sig; -> syscall(Syskill, a(pid), a(sig))}
const fork = {; -> (syscall(Sysfork) : pid)}
const clone = {flags, stk, ptid, ctid, ptreg; -> (syscall(Sysclone, a(flags), a(stk), a(ptid), a(ctid), a(ptreg)) : pid)}
const wait4 = {pid, loc, opt, usage; -> syscall(Syswait4, a(pid), a(loc), a(opt), a(usage))}
const waitpid = {pid, loc, opt;
var rusage
-> wait4(pid, loc, opt, &rusage)
}
const execv = {cmd, args
var p, cargs, i
/* of course we fucking have to duplicate this code everywhere,
* since we want to stack allocate... */
p = alloca((args.len + 1)*sizeof(byte#))
cargs = (p : byte##)[:args.len + 1]
for i = 0; i < args.len; i++
cargs[i] = cstring(args[i])
;;
cargs[args.len] = (0 : byte#)
-> syscall(Sysexecve, cstring(cmd), a(p), a(__cenvp))
}
const execve = {cmd, args, env
var cargs, cenv, i
var ap, ep
/* copy the args */
ap = alloca((args.len + 1)*sizeof(byte#))
cargs = (ap : byte##)[:args.len + 1]
for i = 0; i < args.len; i++
cargs[i] = cstring(args[i])
;;
cargs[args.len] = (0 : byte#)
/*
copy the env.
of course we fucking have to duplicate this code everywhere,
since we want to stack allocate...
*/
ep = alloca((env.len + 1)*sizeof(byte#))
cenv = (ep : byte##)[:env.len]
for i = 0; i < env.len; i++
cenv[i] = cstring(env[i])
;;
cenv[env.len] = (0 : byte#)
-> syscall(Sysexecve, cstring(cmd), a(ap), a(ep))
}
/* file manipulation */
const open = {path, opts; -> (syscall(Sysopen, cstring(path), a(opts), a(0o777)) : fd)}
const openmode = {path, opts, mode; -> (syscall(Sysopen, cstring(path), a(opts), a(mode)) : fd)}
const close = {fd; -> syscall(Sysclose, a(fd))}
const creat = {path, mode; -> (syscall(Syscreat, cstring(path), a(mode)) : fd)}
const rename = {from, to; -> syscall(Sysrename, cstring(from), cstring(to))}
const unlink = {path; -> (syscall(Sysunlink, cstring(path)) : int)}
const readlink = {path, buf; -> syscall(Sysreadlink, cstring(path), (buf : byte#), a(buf.len))}
const read = {fd, buf; -> (syscall(Sysread, a(fd), (buf : byte#), a(buf.len)) : size)}
const pread = {fd, buf, off; -> (syscall(Syspread, a(fd), (buf : byte#), a(buf.len), a(off)) : size)}
const write = {fd, buf; -> (syscall(Syswrite, a(fd), (buf : byte#), a(buf.len)) : size)}
const pwrite = {fd, buf, off; -> (syscall(Syspwrite, a(fd), (buf : byte#), a(buf.len), a(off)) : size)}
const lseek = {fd, off, whence; -> syscall(Syslseek, a(fd), a(off), a(whence))}
const stat = {path, sb; -> syscall(Sysstat, cstring(path), a(sb))}
const lstat = {path, sb; -> syscall(Syslstat, cstring(path), a(sb))}
const fstat = {fd, sb; -> syscall(Sysfstat, a(fd), a(sb))}
const mkdir = {path, mode; -> (syscall(Sysmkdir, cstring(path), a(mode)) : int64)}
generic ioctl = {fd, req, arg; -> (syscall(Sysioctl, a(fd), a(req), a(arg)) : int64)}
const getdents64 = {fd, buf; -> syscall(Sysgetdents64, a(fd), (buf : byte#), a(buf.len))}
const chdir = {dir; -> syscall(Syschdir, cstring(dir))}
const getcwd = {buf; -> syscall(Sysgetcwd, a(buf), a(buf.len))}
const sendmsg = {fd, msg, flags; -> syscall(Syssendmsg, a(fd), msg, a(flags))}
const recvmsg = {fd, msg, flags; -> syscall(Sysrecvmsg, a(fd), msg, a(flags))}
const fallocate = {fd, mode, off, len; -> syscall(Sysfallocate, a(fd), a(mode), a(off), a(len))}
const memfdcreate = {name, flags; -> (syscall(Sysmemfd_create, cstring(name), a(flags)) : fd)}
/* file stuff */
const pipe = {fds; -> syscall(Syspipe, a(fds))}
const dup = {fd; -> (syscall(Sysdup, a(fd)) : fd)}
const dup2 = {src, dst; -> (syscall(Sysdup2, a(src), a(dst)) : fd)}
const sigaction = {sig, act, oact;
if act.restore == (0 : byte#)
act.flags |= Sarestorer
act.restore = (sys.sigreturn : byte#)
;;
-> (syscall(Sysrt_sigaction, a(sig), a(act), a(oact), a(sizeof(sigflags))) : int)
}
const sigprocmask = {sig, act, oact; -> (syscall(Sysrt_sigprocmask, a(sig), a(act), a(oact), a(sizeof(sigflags))) : int)}
/* threading */
const futex = {uaddr, op, val, timeout, uaddr2, val3
-> syscall(Sysfutex, a(uaddr), a(op), a(val), a(timeout), a(uaddr2), a(val3))
}
const semctl = {semid, semnum, cmd, arg
-> (syscall(Syssemctl, a(semnum), a(cmd), a(arg)) : int)
}
/* poll */
const poll = {pfd, timeout; -> (syscall(Syspoll, (pfd : pollfd#), a(pfd.len), a(timeout)) : int)}
const epollctl = {epfd, op, fd, evt;
-> (syscall(Sysepoll_ctl, a(epfd), a(op), a(fd), a(evt)) : int)}
const epollwait = {epfd, evts, timeout;
-> (syscall(Sysepoll_wait, a(epfd), (evts : epollevt#), a(evts.len), a(timeout)) : int)}
const epollcreate = {flg; -> (syscall(Sysepoll_create1, a(flg)) : fd)}
/* networking */
const socket = {dom, stype, proto; -> (syscall(Syssocket, a(dom), a(stype), a(proto)) : fd)}
const connect = {sock, addr, len; -> (syscall(Sysconnect, a(sock), a(addr), a(len)) : int)}
const bind = {sock, addr, len; -> (syscall(Sysbind, a(sock), a(addr), a(len)) : int)}
const listen = {sock, backlog; -> (syscall(Syslisten, a(sock), a(backlog)) : int)}
const accept = {sock, addr, lenp; -> (syscall(Sysaccept, a(sock), a(addr), a(lenp)) : fd)}
const setsockopt = {sock, lev, opt, val, len; -> (syscall(Syssetsockopt, a(sock), a(lev), a(opt), a(val), a(len)) : int)}
const getsockopt = {sock, lev, opt, val, len; -> (syscall(Syssetsockopt, a(sock), a(lev), a(opt), a(val), a(len)) : int)}
/* memory mapping */
const munmap = {addr, len; -> syscall(Sysmunmap, a(addr), a(len))}
const mmap = {addr, len, prot, flags, fd, off;
-> (syscall(Sysmmap, a(addr), a(len), a(prot), a(flags), a(fd), a(off)) : byte#)
}
/* time */
const clock_getres = {clk, ts; -> (syscall(Sysclock_getres, clockid(clk), a(ts)) : int32)}
const clock_gettime = {clk, ts; -> (syscall(Sysclock_gettime, clockid(clk), a(ts)) : int32)}
const clock_settime = {clk, ts; -> (syscall(Sysclock_settime, clockid(clk), a(ts)) : int32)}
const nanosleep = {req, rem; -> (syscall(Sysnanosleep, a(req), a(rem)) : int32)}
/* user/group management */
const getuid = {; -> (syscall(Sysgetuid) : uint32)}
const getgid = {; -> (syscall(Sysgetgid) : uint32)}
const setuid = {uid; -> (syscall(Syssetuid, a(uid)) : int32)}
const setgid = {gid; -> (syscall(Syssetgid, a(gid)) : int32)}
/* system information */
const uname = {buf; -> (syscall(Sysuname, buf) : int)}
const clockid = {clk
match clk
| `Clockrealtime: -> 0
| `Clockmonotonic: -> 1
| `Clockproccpu: -> 2
| `Clockthreadcpu: -> 3
| `Clockmonotonicraw: -> 4
| `Clockrealtimecoarse: -> 5
| `Clockmonotoniccoarse:-> 6
| `Clockboottime: -> 7
| `Clockrealtimealarm: -> 8
| `Clockboottimealarm: -> 9
;;
-> -1
}
const waitstatus = {st
if st & 0x7f == 0 /* if exited */
-> `Waitexit ((st & 0xff00) >> 8)
elif ((st & 0xffff)-1) < 0xff /* if signaled */
-> `Waitsig ((st) & 0x7f)
elif (((st & 0xffff)*0x10001)>>8) > 0x7f00
-> `Waitstop ((st & 0xff00) >> 8)
;;
-> `Waitfail st /* wait failed to give a result */
}