mirror of
https://github.com/ziglang/zig.git
synced 2025-12-06 14:23:09 +00:00
523fae420b
alongside the typical msghdr struct, Zig has added a msghdr_const type that can be used with sendmsg which allows const data to be provided. I believe that data pointed to by the iov and control fields in msghdr are also left unmodified, in which case they can be marked const as well.
427 lines
11 KiB
Zig
427 lines
11 KiB
Zig
const std = @import("../../std.zig");
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const maxInt = std.math.maxInt;
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const linux = std.os.linux;
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const SYS = linux.SYS;
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const socklen_t = linux.socklen_t;
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const iovec = std.os.iovec;
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const iovec_const = std.os.iovec_const;
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const uid_t = linux.uid_t;
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const gid_t = linux.gid_t;
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const pid_t = linux.pid_t;
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const sockaddr = linux.sockaddr;
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const timespec = linux.timespec;
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pub fn syscall0(number: SYS) usize {
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return asm volatile (
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\\ syscall
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\\ blez $7, 1f
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\\ subu $2, $0, $2
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\\ 1:
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: [ret] "={$2}" (-> usize),
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: [number] "{$2}" (@enumToInt(number)),
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: "$1", "$3", "$4", "$5", "$6", "$7", "$8", "$9", "$10", "$11", "$12", "$13", "$14", "$15", "$24", "$25", "hi", "lo", "memory"
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);
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}
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pub fn syscall_pipe(fd: *[2]i32) usize {
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return asm volatile (
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\\ .set noat
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\\ .set noreorder
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\\ syscall
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\\ blez $7, 1f
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\\ nop
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\\ b 2f
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\\ subu $2, $0, $2
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\\ 1:
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\\ sw $2, 0($4)
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\\ sw $3, 4($4)
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\\ 2:
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: [ret] "={$2}" (-> usize),
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: [number] "{$2}" (@enumToInt(SYS.pipe)),
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[fd] "{$4}" (fd),
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: "$1", "$3", "$5", "$6", "$7", "$8", "$9", "$10", "$11", "$12", "$13", "$14", "$15", "$24", "$25", "hi", "lo", "memory"
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);
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}
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pub fn syscall1(number: SYS, arg1: usize) usize {
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return asm volatile (
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\\ syscall
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\\ blez $7, 1f
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\\ subu $2, $0, $2
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\\ 1:
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: [ret] "={$2}" (-> usize),
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: [number] "{$2}" (@enumToInt(number)),
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[arg1] "{$4}" (arg1),
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: "$1", "$3", "$5", "$6", "$7", "$8", "$9", "$10", "$11", "$12", "$13", "$14", "$15", "$24", "$25", "hi", "lo", "memory"
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);
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}
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pub fn syscall2(number: SYS, arg1: usize, arg2: usize) usize {
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return asm volatile (
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\\ syscall
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\\ blez $7, 1f
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\\ subu $2, $0, $2
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\\ 1:
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: [ret] "={$2}" (-> usize),
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: [number] "{$2}" (@enumToInt(number)),
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[arg1] "{$4}" (arg1),
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[arg2] "{$5}" (arg2),
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: "$1", "$3", "$6", "$7", "$8", "$9", "$10", "$11", "$12", "$13", "$14", "$15", "$24", "$25", "hi", "lo", "memory"
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);
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}
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pub fn syscall3(number: SYS, arg1: usize, arg2: usize, arg3: usize) usize {
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return asm volatile (
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\\ syscall
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\\ blez $7, 1f
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\\ subu $2, $0, $2
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\\ 1:
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: [ret] "={$2}" (-> usize),
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: [number] "{$2}" (@enumToInt(number)),
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[arg1] "{$4}" (arg1),
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[arg2] "{$5}" (arg2),
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[arg3] "{$6}" (arg3),
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: "$1", "$3", "$7", "$8", "$9", "$10", "$11", "$12", "$13", "$14", "$15", "$24", "$25", "hi", "lo", "memory"
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);
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}
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pub fn syscall4(number: SYS, arg1: usize, arg2: usize, arg3: usize, arg4: usize) usize {
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return asm volatile (
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\\ syscall
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\\ blez $7, 1f
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\\ subu $2, $0, $2
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\\ 1:
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: [ret] "={$2}" (-> usize),
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: [number] "{$2}" (@enumToInt(number)),
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[arg1] "{$4}" (arg1),
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[arg2] "{$5}" (arg2),
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[arg3] "{$6}" (arg3),
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[arg4] "{$7}" (arg4),
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: "$1", "$3", "$8", "$9", "$10", "$11", "$12", "$13", "$14", "$15", "$24", "$25", "hi", "lo", "memory"
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);
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}
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pub fn syscall5(number: SYS, arg1: usize, arg2: usize, arg3: usize, arg4: usize, arg5: usize) usize {
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return asm volatile (
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\\ .set noat
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\\ subu $sp, $sp, 24
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\\ sw %[arg5], 16($sp)
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\\ syscall
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\\ addu $sp, $sp, 24
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\\ blez $7, 1f
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\\ subu $2, $0, $2
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\\ 1:
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: [ret] "={$2}" (-> usize),
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: [number] "{$2}" (@enumToInt(number)),
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[arg1] "{$4}" (arg1),
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[arg2] "{$5}" (arg2),
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[arg3] "{$6}" (arg3),
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[arg4] "{$7}" (arg4),
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[arg5] "r" (arg5),
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: "$1", "$3", "$8", "$9", "$10", "$11", "$12", "$13", "$14", "$15", "$24", "$25", "hi", "lo", "memory"
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);
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}
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// NOTE: The o32 calling convention requires the callee to reserve 16 bytes for
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// the first four arguments even though they're passed in $a0-$a3.
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pub fn syscall6(
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number: SYS,
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arg1: usize,
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arg2: usize,
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arg3: usize,
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arg4: usize,
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arg5: usize,
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arg6: usize,
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) usize {
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return asm volatile (
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\\ .set noat
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\\ subu $sp, $sp, 24
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\\ sw %[arg5], 16($sp)
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\\ sw %[arg6], 20($sp)
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\\ syscall
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\\ addu $sp, $sp, 24
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\\ blez $7, 1f
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\\ subu $2, $0, $2
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\\ 1:
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: [ret] "={$2}" (-> usize),
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: [number] "{$2}" (@enumToInt(number)),
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[arg1] "{$4}" (arg1),
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[arg2] "{$5}" (arg2),
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[arg3] "{$6}" (arg3),
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[arg4] "{$7}" (arg4),
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[arg5] "r" (arg5),
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[arg6] "r" (arg6),
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: "$1", "$3", "$8", "$9", "$10", "$11", "$12", "$13", "$14", "$15", "$24", "$25", "hi", "lo", "memory"
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);
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}
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pub fn syscall7(
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number: SYS,
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arg1: usize,
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arg2: usize,
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arg3: usize,
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arg4: usize,
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arg5: usize,
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arg6: usize,
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arg7: usize,
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) usize {
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return asm volatile (
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\\ .set noat
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\\ subu $sp, $sp, 32
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\\ sw %[arg5], 16($sp)
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\\ sw %[arg6], 20($sp)
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\\ sw %[arg7], 24($sp)
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\\ syscall
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\\ addu $sp, $sp, 32
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\\ blez $7, 1f
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\\ subu $2, $0, $2
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\\ 1:
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: [ret] "={$2}" (-> usize),
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: [number] "{$2}" (@enumToInt(number)),
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[arg1] "{$4}" (arg1),
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[arg2] "{$5}" (arg2),
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[arg3] "{$6}" (arg3),
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[arg4] "{$7}" (arg4),
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[arg5] "r" (arg5),
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[arg6] "r" (arg6),
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[arg7] "r" (arg7),
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: "$1", "$3", "$8", "$9", "$10", "$11", "$12", "$13", "$14", "$15", "$24", "$25", "hi", "lo", "memory"
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);
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}
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/// This matches the libc clone function.
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pub extern fn clone(func: fn (arg: usize) callconv(.C) u8, stack: usize, flags: u32, arg: usize, ptid: *i32, tls: usize, ctid: *i32) usize;
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pub fn restore() callconv(.Naked) void {
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return asm volatile ("syscall"
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:
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: [number] "{$2}" (@enumToInt(SYS.sigreturn)),
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: "$1", "$3", "$4", "$5", "$6", "$7", "$8", "$9", "$10", "$11", "$12", "$13", "$14", "$15", "$24", "$25", "hi", "lo", "memory"
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);
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}
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pub fn restore_rt() callconv(.Naked) void {
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return asm volatile ("syscall"
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:
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: [number] "{$2}" (@enumToInt(SYS.rt_sigreturn)),
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: "$1", "$3", "$4", "$5", "$6", "$7", "$8", "$9", "$10", "$11", "$12", "$13", "$14", "$15", "$24", "$25", "hi", "lo", "memory"
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);
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}
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pub const O = struct {
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pub const CREAT = 0o0400;
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pub const EXCL = 0o02000;
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pub const NOCTTY = 0o04000;
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pub const TRUNC = 0o01000;
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pub const APPEND = 0o0010;
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pub const NONBLOCK = 0o0200;
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pub const DSYNC = 0o0020;
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pub const SYNC = 0o040020;
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pub const RSYNC = 0o040020;
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pub const DIRECTORY = 0o0200000;
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pub const NOFOLLOW = 0o0400000;
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pub const CLOEXEC = 0o02000000;
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pub const ASYNC = 0o010000;
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pub const DIRECT = 0o0100000;
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pub const LARGEFILE = 0o020000;
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pub const NOATIME = 0o01000000;
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pub const PATH = 0o010000000;
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pub const TMPFILE = 0o020200000;
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pub const NDELAY = NONBLOCK;
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};
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pub const F = struct {
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pub const DUPFD = 0;
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pub const GETFD = 1;
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pub const SETFD = 2;
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pub const GETFL = 3;
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pub const SETFL = 4;
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pub const SETOWN = 24;
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pub const GETOWN = 23;
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pub const SETSIG = 10;
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pub const GETSIG = 11;
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pub const GETLK = 33;
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pub const SETLK = 34;
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pub const SETLKW = 35;
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pub const RDLCK = 0;
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pub const WRLCK = 1;
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pub const UNLCK = 2;
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pub const SETOWN_EX = 15;
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pub const GETOWN_EX = 16;
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pub const GETOWNER_UIDS = 17;
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};
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pub const LOCK = struct {
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pub const SH = 1;
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pub const EX = 2;
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pub const UN = 8;
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pub const NB = 4;
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};
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pub const MMAP2_UNIT = 4096;
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pub const MAP = struct {
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pub const NORESERVE = 0x0400;
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pub const GROWSDOWN = 0x1000;
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pub const DENYWRITE = 0x2000;
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pub const EXECUTABLE = 0x4000;
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pub const LOCKED = 0x8000;
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pub const @"32BIT" = 0x40;
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};
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pub const VDSO = struct {
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pub const CGT_SYM = "__kernel_clock_gettime";
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pub const CGT_VER = "LINUX_2.6.39";
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};
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pub const Flock = extern struct {
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type: i16,
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whence: i16,
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__pad0: [4]u8,
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start: off_t,
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len: off_t,
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pid: pid_t,
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__unused: [4]u8,
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};
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pub const msghdr = extern struct {
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name: ?*sockaddr,
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namelen: socklen_t,
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iov: [*]iovec,
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iovlen: i32,
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control: ?*anyopaque,
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controllen: socklen_t,
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flags: i32,
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};
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pub const msghdr_const = extern struct {
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name: ?*const sockaddr,
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namelen: socklen_t,
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iov: [*]const iovec_const,
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iovlen: i32,
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control: ?*const anyopaque,
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controllen: socklen_t,
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flags: i32,
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};
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pub const blksize_t = i32;
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pub const nlink_t = u32;
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pub const time_t = i32;
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pub const mode_t = u32;
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pub const off_t = i64;
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pub const ino_t = u64;
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pub const dev_t = u64;
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pub const blkcnt_t = i64;
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// The `stat` definition used by the Linux kernel.
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pub const Stat = extern struct {
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dev: u32,
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__pad0: [3]u32, // Reserved for st_dev expansion
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ino: ino_t,
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mode: mode_t,
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nlink: nlink_t,
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uid: uid_t,
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gid: gid_t,
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rdev: u32,
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__pad1: [3]u32,
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size: off_t,
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atim: timespec,
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mtim: timespec,
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ctim: timespec,
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blksize: blksize_t,
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__pad3: u32,
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blocks: blkcnt_t,
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__pad4: [14]usize,
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pub fn atime(self: @This()) timespec {
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return self.atim;
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}
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pub fn mtime(self: @This()) timespec {
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return self.mtim;
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}
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pub fn ctime(self: @This()) timespec {
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return self.ctim;
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}
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};
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pub const timeval = extern struct {
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tv_sec: isize,
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tv_usec: isize,
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};
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pub const timezone = extern struct {
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tz_minuteswest: i32,
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tz_dsttime: i32,
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};
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pub const Elf_Symndx = u32;
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pub const rlimit_resource = enum(c_int) {
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/// Per-process CPU limit, in seconds.
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CPU,
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/// Largest file that can be created, in bytes.
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FSIZE,
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/// Maximum size of data segment, in bytes.
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DATA,
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/// Maximum size of stack segment, in bytes.
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STACK,
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/// Largest core file that can be created, in bytes.
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CORE,
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/// Number of open files.
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NOFILE,
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/// Address space limit.
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AS,
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/// Largest resident set size, in bytes.
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/// This affects swapping; processes that are exceeding their
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/// resident set size will be more likely to have physical memory
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/// taken from them.
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RSS,
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/// Number of processes.
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NPROC,
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/// Locked-in-memory address space.
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MEMLOCK,
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/// Maximum number of file locks.
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LOCKS,
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/// Maximum number of pending signals.
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SIGPENDING,
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/// Maximum bytes in POSIX message queues.
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MSGQUEUE,
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/// Maximum nice priority allowed to raise to.
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/// Nice levels 19 .. -20 correspond to 0 .. 39
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/// values of this resource limit.
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NICE,
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/// Maximum realtime priority allowed for non-priviledged
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/// processes.
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RTPRIO,
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/// Maximum CPU time in µs that a process scheduled under a real-time
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/// scheduling policy may consume without making a blocking system
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/// call before being forcibly descheduled.
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RTTIME,
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_,
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};
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