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const builtin = @import("builtin");
const std = @import("../../std.zig");
const maxInt = std.math.maxInt;
const linux = std.os.linux;
const SYS = linux.SYS;
const socklen_t = linux.socklen_t;
const sockaddr = linux.sockaddr;
const iovec = std.posix.iovec;
const iovec_const = std.posix.iovec_const;
const uid_t = linux.uid_t;
const gid_t = linux.gid_t;
const pid_t = linux.pid_t;
const stack_t = linux.stack_t;
const sigset_t = linux.sigset_t;
const timespec = std.os.linux.timespec;
pub fn syscall0(number: SYS) usize {
return asm volatile ("svc #0"
: [ret] "={x0}" (-> usize),
: [number] "{x8}" (@intFromEnum(number)),
: .{ .memory = true });
}
pub fn syscall1(number: SYS, arg1: usize) usize {
return asm volatile ("svc #0"
: [ret] "={x0}" (-> usize),
: [number] "{x8}" (@intFromEnum(number)),
[arg1] "{x0}" (arg1),
: .{ .memory = true });
}
pub fn syscall2(number: SYS, arg1: usize, arg2: usize) usize {
return asm volatile ("svc #0"
: [ret] "={x0}" (-> usize),
: [number] "{x8}" (@intFromEnum(number)),
[arg1] "{x0}" (arg1),
[arg2] "{x1}" (arg2),
: .{ .memory = true });
}
pub fn syscall3(number: SYS, arg1: usize, arg2: usize, arg3: usize) usize {
return asm volatile ("svc #0"
: [ret] "={x0}" (-> usize),
: [number] "{x8}" (@intFromEnum(number)),
[arg1] "{x0}" (arg1),
[arg2] "{x1}" (arg2),
[arg3] "{x2}" (arg3),
: .{ .memory = true });
}
pub fn syscall4(number: SYS, arg1: usize, arg2: usize, arg3: usize, arg4: usize) usize {
return asm volatile ("svc #0"
: [ret] "={x0}" (-> usize),
: [number] "{x8}" (@intFromEnum(number)),
[arg1] "{x0}" (arg1),
[arg2] "{x1}" (arg2),
[arg3] "{x2}" (arg3),
[arg4] "{x3}" (arg4),
: .{ .memory = true });
}
pub fn syscall5(number: SYS, arg1: usize, arg2: usize, arg3: usize, arg4: usize, arg5: usize) usize {
return asm volatile ("svc #0"
: [ret] "={x0}" (-> usize),
: [number] "{x8}" (@intFromEnum(number)),
[arg1] "{x0}" (arg1),
[arg2] "{x1}" (arg2),
[arg3] "{x2}" (arg3),
[arg4] "{x3}" (arg4),
[arg5] "{x4}" (arg5),
: .{ .memory = true });
}
pub fn syscall6(
number: SYS,
arg1: usize,
arg2: usize,
arg3: usize,
arg4: usize,
arg5: usize,
arg6: usize,
) usize {
return asm volatile ("svc #0"
: [ret] "={x0}" (-> usize),
: [number] "{x8}" (@intFromEnum(number)),
[arg1] "{x0}" (arg1),
[arg2] "{x1}" (arg2),
[arg3] "{x2}" (arg3),
[arg4] "{x3}" (arg4),
[arg5] "{x4}" (arg5),
[arg6] "{x5}" (arg6),
: .{ .memory = true });
}
pub fn clone() callconv(.naked) usize {
// __clone(func, stack, flags, arg, ptid, tls, ctid)
// x0, x1, w2, x3, x4, x5, x6
//
// syscall(SYS_clone, flags, stack, ptid, tls, ctid)
// x8, x0, x1, x2, x3, x4
asm volatile (
\\ // align stack and save func,arg
\\ and x1,x1,#-16
\\ stp x0,x3,[x1,#-16]!
\\
\\ // syscall
\\ uxtw x0,w2
\\ mov x2,x4
\\ mov x3,x5
\\ mov x4,x6
\\ mov x8,#220 // SYS_clone
\\ svc #0
\\
\\ cbz x0,1f
\\ // parent
\\ ret
\\
\\ // child
\\1:
);
if (builtin.unwind_tables != .none or !builtin.strip_debug_info) asm volatile (
\\ .cfi_undefined lr
);
asm volatile (
\\ mov fp, 0
\\ mov lr, 0
\\
\\ ldp x1,x0,[sp],#16
\\ blr x1
\\ mov x8,#93 // SYS_exit
\\ svc #0
);
}
pub const restore = restore_rt;
pub fn restore_rt() callconv(.naked) noreturn {
switch (@import("builtin").zig_backend) {
.stage2_c => asm volatile (
\\ mov x8, %[number]
\\ svc #0
:
: [number] "i" (@intFromEnum(SYS.rt_sigreturn)),
),
else => asm volatile (
\\ svc #0
:
: [number] "{x8}" (@intFromEnum(SYS.rt_sigreturn)),
),
}
}
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 = 8;
pub const GETOWN = 9;
pub const SETSIG = 10;
pub const GETSIG = 11;
pub const GETLK = 5;
pub const SETLK = 6;
pub const SETLKW = 7;
pub const RDLCK = 0;
pub const WRLCK = 1;
pub const UNLCK = 2;
pub const SETOWN_EX = 15;
pub const GETOWN_EX = 16;
pub const GETOWNER_UIDS = 17;
};
pub const VDSO = struct {
pub const CGT_SYM = "__kernel_clock_gettime";
pub const CGT_VER = "LINUX_2.6.39";
};
pub const Flock = extern struct {
type: i16,
whence: i16,
start: off_t,
len: off_t,
pid: pid_t,
__unused: [4]u8,
};
pub const blksize_t = i32;
pub const nlink_t = u32;
pub const time_t = isize;
pub const mode_t = u32;
pub const off_t = isize;
pub const ino_t = usize;
pub const dev_t = usize;
pub const blkcnt_t = isize;
// The `stat` definition used by the Linux kernel.
pub const Stat = extern struct {
dev: dev_t,
ino: ino_t,
mode: mode_t,
nlink: nlink_t,
uid: uid_t,
gid: gid_t,
rdev: dev_t,
__pad: usize,
size: off_t,
blksize: blksize_t,
__pad2: i32,
blocks: blkcnt_t,
atim: timespec,
mtim: timespec,
ctim: timespec,
__unused: [2]u32,
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;
}
};
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