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const arch = switch (@compile_var("arch")) {
x86_64 => @import("linux_x86_64.zig"),
i386 => @import("linux_i386.zig"),
else => unreachable{},
};
pub const MMAP_PROT_NONE = 0;
pub const MMAP_PROT_READ = 1;
pub const MMAP_PROT_WRITE = 2;
pub const MMAP_PROT_EXEC = 4;
pub const MMAP_MAP_FILE = 0;
pub const MMAP_MAP_SHARED = 1;
pub const MMAP_MAP_PRIVATE = 2;
pub const MMAP_MAP_FIXED = 16;
pub const MMAP_MAP_ANON = 32;
pub const SIGHUP = 1;
pub const SIGINT = 2;
pub const SIGQUIT = 3;
pub const SIGILL = 4;
pub const SIGTRAP = 5;
pub const SIGABRT = 6;
pub const SIGIOT = SIGABRT;
pub const SIGBUS = 7;
pub const SIGFPE = 8;
pub const SIGKILL = 9;
pub const SIGUSR1 = 10;
pub const SIGSEGV = 11;
pub const SIGUSR2 = 12;
pub const SIGPIPE = 13;
pub const SIGALRM = 14;
pub const SIGTERM = 15;
pub const SIGSTKFLT = 16;
pub const SIGCHLD = 17;
pub const SIGCONT = 18;
pub const SIGSTOP = 19;
pub const SIGTSTP = 20;
pub const SIGTTIN = 21;
pub const SIGTTOU = 22;
pub const SIGURG = 23;
pub const SIGXCPU = 24;
pub const SIGXFSZ = 25;
pub const SIGVTALRM = 26;
pub const SIGPROF = 27;
pub const SIGWINCH = 28;
pub const SIGIO = 29;
pub const SIGPOLL = 29;
pub const SIGPWR = 30;
pub const SIGSYS = 31;
pub const SIGUNUSED = SIGSYS;
pub const O_RDONLY = 0o0;
pub const O_WRONLY = 0o1;
pub const O_RDWR = 0o2;
pub const O_CREAT = arch.O_CREAT;
pub const O_EXCL = arch.O_EXCL;
pub const O_NOCTTY = arch.O_NOCTTY;
pub const O_TRUNC = arch.O_TRUNC;
pub const O_APPEND = arch.O_APPEND;
pub const O_NONBLOCK = arch.O_NONBLOCK;
pub const O_DSYNC = arch.O_DSYNC;
pub const O_SYNC = arch.O_SYNC;
pub const O_RSYNC = arch.O_RSYNC;
pub const O_DIRECTORY = arch.O_DIRECTORY;
pub const O_NOFOLLOW = arch.O_NOFOLLOW;
pub const O_CLOEXEC = arch.O_CLOEXEC;
pub const O_ASYNC = arch.O_ASYNC;
pub const O_DIRECT = arch.O_DIRECT;
pub const O_LARGEFILE = arch.O_LARGEFILE;
pub const O_NOATIME = arch.O_NOATIME;
pub const O_PATH = arch.O_PATH;
pub const O_TMPFILE = arch.O_TMPFILE;
pub const O_NDELAY = arch.O_NDELAY;
const SIG_BLOCK = 0;
const SIG_UNBLOCK = 1;
const SIG_SETMASK = 2;
pub fn mmap(address: ?&u8, length: isize, prot: isize, flags: isize, fd: isize, offset: isize) -> isize {
// TODO ability to cast maybe pointer to isize
const addr = if (const unwrapped ?= address) isize(unwrapped) else 0;
arch.syscall6(arch.SYS_mmap, addr, length, prot, flags, fd, offset)
}
pub fn munmap(address: &u8, length: isize) -> isize {
arch.syscall2(arch.SYS_munmap, isize(address), length)
}
pub fn read(fd: isize, buf: &u8, count: isize) -> isize {
arch.syscall3(arch.SYS_read, isize(fd), isize(buf), count)
}
pub fn write(fd: isize, buf: &const u8, count: isize) -> isize {
arch.syscall3(arch.SYS_write, isize(fd), isize(buf), count)
}
pub fn open(path: []u8, flags: isize, perm: isize) -> isize {
var buf: [path.len + 1]u8 = undefined;
@memcpy(&buf[0], &path[0], path.len);
buf[path.len] = 0;
arch.syscall3(arch.SYS_open, isize(&buf[0]), flags, perm)
}
pub fn create(path: []u8, perm: isize) -> isize {
var buf: [path.len + 1]u8 = undefined;
@memcpy(&buf[0], &path[0], path.len);
buf[path.len] = 0;
arch.syscall2(arch.SYS_creat, isize(&buf[0]), perm)
}
pub fn openat(dirfd: isize, path: []u8, flags: isize, mode: isize) -> isize {
var buf: [path.len + 1]u8 = undefined;
@memcpy(&buf[0], &path[0], path.len);
buf[path.len] = 0;
arch.syscall4(arch.SYS_openat, dirfd, isize(&buf[0]), flags, mode)
}
pub fn close(fd: isize) -> isize {
arch.syscall1(arch.SYS_close, fd)
}
pub fn lseek(fd: isize, offset: isize, ref_pos: isize) -> isize {
arch.syscall3(arch.SYS_lseek, fd, offset, ref_pos)
}
pub fn exit(status: i32) -> unreachable {
arch.syscall1(arch.SYS_exit, isize(status));
unreachable{}
}
pub fn getrandom(buf: &u8, count: isize, flags: u32) -> isize {
arch.syscall3(arch.SYS_getrandom, isize(buf), count, isize(flags))
}
pub fn kill(pid: i32, sig: i32) -> i32 {
i32(arch.syscall2(arch.SYS_kill, pid, sig))
}
const NSIG = 65;
const sigset_t = [128]u8;
const all_mask = []u8 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, };
const app_mask = []u8 { 0xff, 0xff, 0xff, 0xfc, 0x7f, 0xff, 0xff, 0xff, };
pub fn raise(sig: i32) -> i32 {
var set: sigset_t = undefined;
block_app_signals(&set);
const tid = i32(arch.syscall0(arch.SYS_gettid));
const ret = i32(arch.syscall2(arch.SYS_tkill, tid, sig));
restore_signals(&set);
return ret;
}
fn block_all_signals(set: &sigset_t) {
arch.syscall4(arch.SYS_rt_sigprocmask, SIG_BLOCK, isize(&all_mask), isize(set), NSIG/8);
}
fn block_app_signals(set: &sigset_t) {
arch.syscall4(arch.SYS_rt_sigprocmask, SIG_BLOCK, isize(&app_mask), isize(set), NSIG/8);
}
fn restore_signals(set: &sigset_t) {
arch.syscall4(arch.SYS_rt_sigprocmask, SIG_SETMASK, isize(set), 0, NSIG/8);
}
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