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zig/lib/std/os/linux/sparc64.zig
Anthony Carrico 078aa5f7b2 Adds Linux support for POSIX file locking with fcntl 
On Linux, locking fails with EAGAIN (vs. EACCES on other systems).
This commit also adds FcntlErrors for EDEADLK and ENOLCK.
2022-02-15 13:22:50 +02:00

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const std = @import("../../std.zig");
const maxInt = std.math.maxInt;
const pid_t = linux.pid_t;
const uid_t = linux.uid_t;
const clock_t = linux.clock_t;
const stack_t = linux.stack_t;
const sigset_t = linux.sigset_t;
const linux = std.os.linux;
const sockaddr = linux.sockaddr;
const socklen_t = linux.socklen_t;
const iovec = linux.iovec;
const iovec_const = linux.iovec_const;
const timespec = linux.timespec;
pub fn syscall_pipe(fd: *[2]i32) usize {
return asm volatile (
\\ mov %[arg], %%g3
\\ t 0x6d
\\ bcc,pt %%xcc, 1f
\\ nop
\\ # Return the error code
\\ ba 2f
\\ neg %%o0
\\1:
\\ st %%o0, [%%g3+0]
\\ st %%o1, [%%g3+4]
\\ clr %%o0
\\2:
: [ret] "={o0}" (-> usize),
: [number] "{g1}" (@enumToInt(SYS.pipe)),
[arg] "r" (fd),
: "memory", "g3"
);
}
pub fn syscall_fork() usize {
// Linux/sparc64 fork() returns two values in %o0 and %o1:
// - On the parent's side, %o0 is the child's PID and %o1 is 0.
// - On the child's side, %o0 is the parent's PID and %o1 is 1.
// We need to clear the child's %o0 so that the return values
// conform to the libc convention.
return asm volatile (
\\ t 0x6d
\\ bcc,pt %%xcc, 1f
\\ nop
\\ ba 2f
\\ neg %%o0
\\ 1:
\\ # Clear the child's %%o0
\\ dec %%o1
\\ and %%o1, %%o0, %%o0
\\ 2:
: [ret] "={o0}" (-> usize),
: [number] "{g1}" (@enumToInt(SYS.fork)),
: "memory", "xcc", "o1", "o2", "o3", "o4", "o5", "o7"
);
}
pub fn syscall0(number: SYS) usize {
return asm volatile (
\\ t 0x6d
\\ bcc,pt %%xcc, 1f
\\ nop
\\ neg %%o0
\\ 1:
: [ret] "={o0}" (-> usize),
: [number] "{g1}" (@enumToInt(number)),
: "memory", "xcc", "o1", "o2", "o3", "o4", "o5", "o7"
);
}
pub fn syscall1(number: SYS, arg1: usize) usize {
return asm volatile (
\\ t 0x6d
\\ bcc,pt %%xcc, 1f
\\ nop
\\ neg %%o0
\\ 1:
: [ret] "={o0}" (-> usize),
: [number] "{g1}" (@enumToInt(number)),
[arg1] "{o0}" (arg1),
: "memory", "xcc", "o1", "o2", "o3", "o4", "o5", "o7"
);
}
pub fn syscall2(number: SYS, arg1: usize, arg2: usize) usize {
return asm volatile (
\\ t 0x6d
\\ bcc,pt %%xcc, 1f
\\ nop
\\ neg %%o0
\\ 1:
: [ret] "={o0}" (-> usize),
: [number] "{g1}" (@enumToInt(number)),
[arg1] "{o0}" (arg1),
[arg2] "{o1}" (arg2),
: "memory", "xcc", "o1", "o2", "o3", "o4", "o5", "o7"
);
}
pub fn syscall3(number: SYS, arg1: usize, arg2: usize, arg3: usize) usize {
return asm volatile (
\\ t 0x6d
\\ bcc,pt %%xcc, 1f
\\ nop
\\ neg %%o0
\\ 1:
: [ret] "={o0}" (-> usize),
: [number] "{g1}" (@enumToInt(number)),
[arg1] "{o0}" (arg1),
[arg2] "{o1}" (arg2),
[arg3] "{o2}" (arg3),
: "memory", "xcc", "o1", "o2", "o3", "o4", "o5", "o7"
);
}
pub fn syscall4(number: SYS, arg1: usize, arg2: usize, arg3: usize, arg4: usize) usize {
return asm volatile (
\\ t 0x6d
\\ bcc,pt %%xcc, 1f
\\ nop
\\ neg %%o0
\\ 1:
: [ret] "={o0}" (-> usize),
: [number] "{g1}" (@enumToInt(number)),
[arg1] "{o0}" (arg1),
[arg2] "{o1}" (arg2),
[arg3] "{o2}" (arg3),
[arg4] "{o3}" (arg4),
: "memory", "xcc", "o1", "o2", "o3", "o4", "o5", "o7"
);
}
pub fn syscall5(number: SYS, arg1: usize, arg2: usize, arg3: usize, arg4: usize, arg5: usize) usize {
return asm volatile (
\\ t 0x6d
\\ bcc,pt %%xcc, 1f
\\ nop
\\ neg %%o0
\\ 1:
: [ret] "={o0}" (-> usize),
: [number] "{g1}" (@enumToInt(number)),
[arg1] "{o0}" (arg1),
[arg2] "{o1}" (arg2),
[arg3] "{o2}" (arg3),
[arg4] "{o3}" (arg4),
[arg5] "{o4}" (arg5),
: "memory", "xcc", "o1", "o2", "o3", "o4", "o5", "o7"
);
}
pub fn syscall6(
number: SYS,
arg1: usize,
arg2: usize,
arg3: usize,
arg4: usize,
arg5: usize,
arg6: usize,
) usize {
return asm volatile (
\\ t 0x6d
\\ bcc,pt %%xcc, 1f
\\ nop
\\ neg %%o0
\\ 1:
: [ret] "={o0}" (-> usize),
: [number] "{g1}" (@enumToInt(number)),
[arg1] "{o0}" (arg1),
[arg2] "{o1}" (arg2),
[arg3] "{o2}" (arg3),
[arg4] "{o3}" (arg4),
[arg5] "{o4}" (arg5),
[arg6] "{o5}" (arg6),
: "memory", "xcc", "o1", "o2", "o3", "o4", "o5", "o7"
);
}
/// This matches the libc clone function.
pub extern fn clone(func: fn (arg: usize) callconv(.C) u8, stack: usize, flags: usize, arg: usize, ptid: *i32, tls: usize, ctid: *i32) usize;
pub const restore = restore_rt;
// Need to use C ABI here instead of naked
// to prevent an infinite loop when calling rt_sigreturn.
pub fn restore_rt() callconv(.C) void {
return asm volatile ("t 0x6d"
:
: [number] "{g1}" (@enumToInt(SYS.rt_sigreturn)),
: "memory", "xcc", "o0", "o1", "o2", "o3", "o4", "o5", "o7"
);
}
pub const SYS = enum(usize) {
restart_syscall = 0,
exit = 1,
fork = 2,
read = 3,
write = 4,
open = 5,
close = 6,
wait4 = 7,
creat = 8,
link = 9,
unlink = 10,
execv = 11,
chdir = 12,
chown = 13,
mknod = 14,
chmod = 15,
lchown = 16,
brk = 17,
perfctr = 18,
lseek = 19,
getpid = 20,
capget = 21,
capset = 22,
setuid = 23,
getuid = 24,
vmsplice = 25,
ptrace = 26,
alarm = 27,
sigaltstack = 28,
pause = 29,
utime = 30,
access = 33,
nice = 34,
sync = 36,
kill = 37,
stat = 38,
sendfile = 39,
lstat = 40,
dup = 41,
pipe = 42,
times = 43,
umount2 = 45,
setgid = 46,
getgid = 47,
signal = 48,
geteuid = 49,
getegid = 50,
acct = 51,
memory_ordering = 52,
ioctl = 54,
reboot = 55,
symlink = 57,
readlink = 58,
execve = 59,
umask = 60,
chroot = 61,
fstat = 62,
fstat64 = 63,
getpagesize = 64,
msync = 65,
vfork = 66,
pread64 = 67,
pwrite64 = 68,
mmap = 71,
munmap = 73,
mprotect = 74,
madvise = 75,
vhangup = 76,
mincore = 78,
getgroups = 79,
setgroups = 80,
getpgrp = 81,
setitimer = 83,
swapon = 85,
getitimer = 86,
sethostname = 88,
dup2 = 90,
fcntl = 92,
select = 93,
fsync = 95,
setpriority = 96,
socket = 97,
connect = 98,
accept = 99,
getpriority = 100,
rt_sigreturn = 101,
rt_sigaction = 102,
rt_sigprocmask = 103,
rt_sigpending = 104,
rt_sigtimedwait = 105,
rt_sigqueueinfo = 106,
rt_sigsuspend = 107,
setresuid = 108,
getresuid = 109,
setresgid = 110,
getresgid = 111,
recvmsg = 113,
sendmsg = 114,
gettimeofday = 116,
getrusage = 117,
getsockopt = 118,
getcwd = 119,
readv = 120,
writev = 121,
settimeofday = 122,
fchown = 123,
fchmod = 124,
recvfrom = 125,
setreuid = 126,
setregid = 127,
rename = 128,
truncate = 129,
ftruncate = 130,
flock = 131,
lstat64 = 132,
sendto = 133,
shutdown = 134,
socketpair = 135,
mkdir = 136,
rmdir = 137,
utimes = 138,
stat64 = 139,
sendfile64 = 140,
getpeername = 141,
futex = 142,
gettid = 143,
getrlimit = 144,
setrlimit = 145,
pivot_root = 146,
prctl = 147,
pciconfig_read = 148,
pciconfig_write = 149,
getsockname = 150,
inotify_init = 151,
inotify_add_watch = 152,
poll = 153,
getdents64 = 154,
inotify_rm_watch = 156,
statfs = 157,
fstatfs = 158,
umount = 159,
sched_set_affinity = 160,
sched_get_affinity = 161,
getdomainname = 162,
setdomainname = 163,
utrap_install = 164,
quotactl = 165,
set_tid_address = 166,
mount = 167,
ustat = 168,
setxattr = 169,
lsetxattr = 170,
fsetxattr = 171,
getxattr = 172,
lgetxattr = 173,
getdents = 174,
setsid = 175,
fchdir = 176,
fgetxattr = 177,
listxattr = 178,
llistxattr = 179,
flistxattr = 180,
removexattr = 181,
lremovexattr = 182,
sigpending = 183,
query_module = 184,
setpgid = 185,
fremovexattr = 186,
tkill = 187,
exit_group = 188,
uname = 189,
init_module = 190,
personality = 191,
remap_file_pages = 192,
epoll_create = 193,
epoll_ctl = 194,
epoll_wait = 195,
ioprio_set = 196,
getppid = 197,
sigaction = 198,
sgetmask = 199,
ssetmask = 200,
sigsuspend = 201,
oldlstat = 202,
uselib = 203,
readdir = 204,
readahead = 205,
socketcall = 206,
syslog = 207,
lookup_dcookie = 208,
fadvise64 = 209,
fadvise64_64 = 210,
tgkill = 211,
waitpid = 212,
swapoff = 213,
sysinfo = 214,
ipc = 215,
sigreturn = 216,
clone = 217,
ioprio_get = 218,
adjtimex = 219,
sigprocmask = 220,
create_module = 221,
delete_module = 222,
get_kernel_syms = 223,
getpgid = 224,
bdflush = 225,
sysfs = 226,
afs_syscall = 227,
setfsuid = 228,
setfsgid = 229,
_newselect = 230,
splice = 232,
stime = 233,
statfs64 = 234,
fstatfs64 = 235,
_llseek = 236,
mlock = 237,
munlock = 238,
mlockall = 239,
munlockall = 240,
sched_setparam = 241,
sched_getparam = 242,
sched_setscheduler = 243,
sched_getscheduler = 244,
sched_yield = 245,
sched_get_priority_max = 246,
sched_get_priority_min = 247,
sched_rr_get_interval = 248,
nanosleep = 249,
mremap = 250,
_sysctl = 251,
getsid = 252,
fdatasync = 253,
nfsservctl = 254,
sync_file_range = 255,
clock_settime = 256,
clock_gettime = 257,
clock_getres = 258,
clock_nanosleep = 259,
sched_getaffinity = 260,
sched_setaffinity = 261,
timer_settime = 262,
timer_gettime = 263,
timer_getoverrun = 264,
timer_delete = 265,
timer_create = 266,
vserver = 267,
io_setup = 268,
io_destroy = 269,
io_submit = 270,
io_cancel = 271,
io_getevents = 272,
mq_open = 273,
mq_unlink = 274,
mq_timedsend = 275,
mq_timedreceive = 276,
mq_notify = 277,
mq_getsetattr = 278,
waitid = 279,
tee = 280,
add_key = 281,
request_key = 282,
keyctl = 283,
openat = 284,
mkdirat = 285,
mknodat = 286,
fchownat = 287,
futimesat = 288,
fstatat64 = 289,
unlinkat = 290,
renameat = 291,
linkat = 292,
symlinkat = 293,
readlinkat = 294,
fchmodat = 295,
faccessat = 296,
pselect6 = 297,
ppoll = 298,
unshare = 299,
set_robust_list = 300,
get_robust_list = 301,
migrate_pages = 302,
mbind = 303,
get_mempolicy = 304,
set_mempolicy = 305,
kexec_load = 306,
move_pages = 307,
getcpu = 308,
epoll_pwait = 309,
utimensat = 310,
signalfd = 311,
timerfd_create = 312,
eventfd = 313,
fallocate = 314,
timerfd_settime = 315,
timerfd_gettime = 316,
signalfd4 = 317,
eventfd2 = 318,
epoll_create1 = 319,
dup3 = 320,
pipe2 = 321,
inotify_init1 = 322,
accept4 = 323,
preadv = 324,
pwritev = 325,
rt_tgsigqueueinfo = 326,
perf_event_open = 327,
recvmmsg = 328,
fanotify_init = 329,
fanotify_mark = 330,
prlimit64 = 331,
name_to_handle_at = 332,
open_by_handle_at = 333,
clock_adjtime = 334,
syncfs = 335,
sendmmsg = 336,
setns = 337,
process_vm_readv = 338,
process_vm_writev = 339,
kern_features = 340,
kcmp = 341,
finit_module = 342,
sched_setattr = 343,
sched_getattr = 344,
renameat2 = 345,
seccomp = 346,
getrandom = 347,
memfd_create = 348,
bpf = 349,
execveat = 350,
membarrier = 351,
userfaultfd = 352,
bind = 353,
listen = 354,
setsockopt = 355,
mlock2 = 356,
copy_file_range = 357,
preadv2 = 358,
pwritev2 = 359,
statx = 360,
io_pgetevents = 361,
pkey_mprotect = 362,
pkey_alloc = 363,
pkey_free = 364,
rseq = 365,
semtimedop = 392,
semget = 393,
semctl = 394,
shmget = 395,
shmctl = 396,
shmat = 397,
shmdt = 398,
msgget = 399,
msgsnd = 400,
msgrcv = 401,
msgctl = 402,
pidfd_send_signal = 424,
io_uring_setup = 425,
io_uring_enter = 426,
io_uring_register = 427,
open_tree = 428,
move_mount = 429,
fsopen = 430,
fsconfig = 431,
fsmount = 432,
fspick = 433,
pidfd_open = 434,
clone3 = 435,
close_range = 436,
openat2 = 437,
pidfd_getfd = 438,
faccessat2 = 439,
process_madvise = 440,
epoll_pwait2 = 441,
mount_setattr = 442,
landlock_create_ruleset = 444,
landlock_add_rule = 445,
landlock_restrict_self = 446,
_,
};
pub const O = struct {
pub const CREAT = 0x200;
pub const EXCL = 0x800;
pub const NOCTTY = 0x8000;
pub const TRUNC = 0x400;
pub const APPEND = 0x8;
pub const NONBLOCK = 0x4000;
pub const SYNC = 0x802000;
pub const DSYNC = 0x2000;
pub const RSYNC = SYNC;
pub const DIRECTORY = 0x10000;
pub const NOFOLLOW = 0x20000;
pub const CLOEXEC = 0x400000;
pub const ASYNC = 0x40;
pub const DIRECT = 0x100000;
pub const LARGEFILE = 0;
pub const NOATIME = 0x200000;
pub const PATH = 0x1000000;
pub const TMPFILE = 0x2010000;
pub const NDELAY = NONBLOCK | 0x4;
};
pub const F = struct {
pub const DUPFD = 0;
pub const GETFD = 1;
pub const SETFD = 2;
pub const GETFL = 3;
pub const SETFL = 4;
pub const SETOWN = 5;
pub const GETOWN = 6;
pub const GETLK = 7;
pub const SETLK = 8;
pub const SETLKW = 9;
pub const RDLCK = 1;
pub const WRLCK = 2;
pub const UNLCK = 3;
pub const SETOWN_EX = 15;
pub const GETOWN_EX = 16;
pub const GETOWNER_UIDS = 17;
};
pub const LOCK = struct {
pub const SH = 1;
pub const EX = 2;
pub const NB = 4;
pub const UN = 8;
};
pub const MAP = struct {
/// stack-like segment
pub const GROWSDOWN = 0x0200;
/// ETXTBSY
pub const DENYWRITE = 0x0800;
/// mark it as an executable
pub const EXECUTABLE = 0x1000;
/// pages are locked
pub const LOCKED = 0x0100;
/// don't check for reservations
pub const NORESERVE = 0x0040;
};
pub const VDSO = struct {
pub const CGT_SYM = "__vdso_clock_gettime";
pub const CGT_VER = "LINUX_2.6";
};
pub const Flock = extern struct {
type: i16,
whence: i16,
start: off_t,
len: off_t,
pid: pid_t,
};
pub const msghdr = extern struct {
msg_name: ?*sockaddr,
msg_namelen: socklen_t,
msg_iov: [*]iovec,
msg_iovlen: u64,
msg_control: ?*anyopaque,
msg_controllen: u64,
msg_flags: i32,
};
pub const msghdr_const = extern struct {
msg_name: ?*const sockaddr,
msg_namelen: socklen_t,
msg_iov: [*]iovec_const,
msg_iovlen: u64,
msg_control: ?*anyopaque,
msg_controllen: u64,
msg_flags: i32,
};
pub const off_t = i64;
pub const ino_t = u64;
pub const mode_t = u32;
pub const dev_t = usize;
pub const nlink_t = u32;
pub const blksize_t = isize;
pub const blkcnt_t = isize;
// The `stat64` definition used by the kernel.
pub const Stat = extern struct {
dev: u64,
ino: u64,
nlink: u64,
mode: u32,
uid: u32,
gid: u32,
__pad0: u32,
rdev: u64,
size: i64,
blksize: i64,
blocks: i64,
atim: timespec,
mtim: timespec,
ctim: timespec,
__unused: [3]u64,
pub fn atime(self: @This()) timespec {
return self.atim;
}
pub fn mtime(self: @This()) timespec {
return self.mtim;
}
pub fn ctime(self: @This()) timespec {
return self.ctim;
}
};
pub const timeval = extern struct {
tv_sec: isize,
tv_usec: i32,
};
pub const timezone = extern struct {
tz_minuteswest: i32,
tz_dsttime: i32,
};
// TODO I'm not sure if the code below is correct, need someone with more
// knowledge about sparc64 linux internals to look into.
pub const Elf_Symndx = u32;
pub const fpstate = extern struct {
regs: [32]u64,
fsr: u64,
gsr: u64,
fprs: u64,
};
pub const __fpq = extern struct {
fpq_addr: *u32,
fpq_instr: u32,
};
pub const __fq = extern struct {
FQu: extern union {
whole: f64,
fpq: __fpq,
},
};
pub const fpregset_t = extern struct {
fpu_fr: extern union {
fpu_regs: [32]u32,
fpu_dregs: [32]f64,
fpu_qregs: [16]c_longdouble,
},
fpu_q: *__fq,
fpu_fsr: u64,
fpu_qcnt: u8,
fpu_q_entrysize: u8,
fpu_en: u8,
};
pub const siginfo_fpu_t = extern struct {
float_regs: [64]u32,
fsr: u64,
gsr: u64,
fprs: u64,
};
pub const sigcontext = extern struct {
info: [128]i8,
regs: extern struct {
u_regs: [16]u64,
tstate: u64,
tpc: u64,
tnpc: u64,
y: u64,
fprs: u64,
},
fpu_save: *siginfo_fpu_t,
stack: extern struct {
sp: usize,
flags: i32,
size: u64,
},
mask: u64,
};
pub const greg_t = u64;
pub const gregset_t = [19]greg_t;
pub const fq = extern struct {
addr: *u64,
insn: u32,
};
pub const fpu_t = extern struct {
fregs: extern union {
sregs: [32]u32,
dregs: [32]u64,
qregs: [16]c_longdouble,
},
fsr: u64,
fprs: u64,
gsr: u64,
fq: *fq,
qcnt: u8,
qentsz: u8,
enab: u8,
};
pub const mcontext_t = extern struct {
gregs: gregset_t,
fp: greg_t,
@"i7": greg_t,
fpregs: fpu_t,
};
pub const ucontext_t = extern struct {
link: *ucontext_t,
flags: u64,
sigmask: u64,
mcontext: mcontext_t,
stack: stack_t,
sigmask: sigset_t,
};
pub const rlimit_resource = enum(c_int) {
/// Per-process CPU limit, in seconds.
CPU,
/// Largest file that can be created, in bytes.
FSIZE,
/// Maximum size of data segment, in bytes.
DATA,
/// Maximum size of stack segment, in bytes.
STACK,
/// Largest core file that can be created, in bytes.
CORE,
/// Largest resident set size, in bytes.
/// This affects swapping; processes that are exceeding their
/// resident set size will be more likely to have physical memory
/// taken from them.
RSS,
/// Number of open files.
NOFILE,
/// Number of processes.
NPROC,
/// Locked-in-memory address space.
MEMLOCK,
/// Address space limit.
AS,
/// Maximum number of file locks.
LOCKS,
/// Maximum number of pending signals.
SIGPENDING,
/// Maximum bytes in POSIX message queues.
MSGQUEUE,
/// Maximum nice priority allowed to raise to.
/// Nice levels 19 .. -20 correspond to 0 .. 39
/// values of this resource limit.
NICE,
/// Maximum realtime priority allowed for non-priviledged
/// processes.
RTPRIO,
/// Maximum CPU time in µs that a process scheduled under a real-time
/// scheduling policy may consume without making a blocking system
/// call before being forcibly descheduled.
RTTIME,
_,
};
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