authorgravatar for jens.goldberg@gmail.comJens Goldberg <jens.goldberg@gmail.com> 2021-09-18 08:56:11+02:00
committergravatar for noreply@github.comGitHub <noreply@github.com> 2021-09-18 09:56:11+03:00
logd2b5105f54ac83fdd874df9408157773ae203798
tree2c8b0d67123d2d619b154600d6c65da9274fd17f
parentf0b1eec8095e442218ff9171e284393102596dc4
signaturebadge-question-mark Signed by PGP key 4AEE18F83AFDEB23

Add Linux ioctl creation utilities (#9748)

* Add Linux ioctl creation utilities * Apply suggestions from code review Co-authored-by: Veikka Tuominen <git@vexu.eu> * Update lib/std/os/linux.zig Co-authored-by: zigazeljko <ziga.zeljko@gmail.com> Co-authored-by: Veikka Tuominen <git@vexu.eu> Co-authored-by: zigazeljko <ziga.zeljko@gmail.com>

2 files changed, 64 insertions(+), 7 deletions(-)

lib/std/os/linux.zig+8-7
...@@ -89,6 +89,7 @@ pub const user_desc = arch_bits.user_desc;...@@ -89,6 +89,7 @@ pub const user_desc = arch_bits.user_desc;
89pub const tls = @import("linux/tls.zig");89pub const tls = @import("linux/tls.zig");
90pub const pie = @import("linux/start_pie.zig");90pub const pie = @import("linux/start_pie.zig");
91pub const BPF = @import("linux/bpf.zig");91pub const BPF = @import("linux/bpf.zig");
92pub const IOCTL = @import("linux/ioctl.zig");
9293
93pub const MAP = struct {94pub const MAP = struct {
94 pub usingnamespace arch_bits.MAP;95 pub usingnamespace arch_bits.MAP;
...@@ -2585,18 +2586,18 @@ pub const T = struct {...@@ -2585,18 +2586,18 @@ pub const T = struct {
2585 pub const IOCGSID = 0x5429;2586 pub const IOCGSID = 0x5429;
2586 pub const IOCGRS485 = 0x542E;2587 pub const IOCGRS485 = 0x542E;
2587 pub const IOCSRS485 = 0x542F;2588 pub const IOCSRS485 = 0x542F;
2588 pub const IOCGPTN = 0x80045430;2589 pub const IOCGPTN = IOCTL.IOR('T', 0x30, c_uint);
2589 pub const IOCSPTLCK = 0x40045431;2590 pub const IOCSPTLCK = IOCTL.IOW('T', 0x31, c_int);
2590 pub const IOCGDEV = 0x80045432;2591 pub const IOCGDEV = IOCTL.IOR('T', 0x32, c_uint);
2591 pub const CGETX = 0x5432;2592 pub const CGETX = 0x5432;
2592 pub const CSETX = 0x5433;2593 pub const CSETX = 0x5433;
2593 pub const CSETXF = 0x5434;2594 pub const CSETXF = 0x5434;
2594 pub const CSETXW = 0x5435;2595 pub const CSETXW = 0x5435;
2595 pub const IOCSIG = 0x40045436;2596 pub const IOCSIG = IOCTL.IOW('T', 0x36, c_int);
2596 pub const IOCVHANGUP = 0x5437;2597 pub const IOCVHANGUP = 0x5437;
2597 pub const IOCGPKT = 0x80045438;2598 pub const IOCGPKT = IOCTL.IOR('T', 0x38, c_int);
2598 pub const IOCGPTLCK = 0x80045439;2599 pub const IOCGPTLCK = IOCTL.IOR('T', 0x39, c_int);
2599 pub const IOCGEXCL = 0x80045440;2600 pub const IOCGEXCL = IOCTL.IOR('T', 0x40, c_int);
2600};2601};
26012602
2602pub const EPOLL = struct {2603pub const EPOLL = struct {
lib/std/os/linux/ioctl.zig created+56
...@@ -0,0 +1,56 @@
1const std = @import("../../std.zig");
2
3const bits = switch (@import("builtin").cpu.arch) {
4 .mips,
5 .mipsel,
6 .mips64,
7 .mips64el,
8 .powerpc,
9 .powerpcle,
10 .powerpc64,
11 .powerpc64le,
12 .sparc,
13 .sparcv9,
14 .sparcel,
15 => .{ .size = 13, .dir = 3, .none = 1, .read = 2, .write = 4 },
16 else => .{ .size = 14, .dir = 2, .none = 0, .read = 2, .write = 1 },
17};
18
19const Direction = std.meta.Int(.unsigned, bits.dir);
20
21pub const Request = packed struct {
22 nr: u8,
23 io_type: u8,
24 size: std.meta.Int(.unsigned, bits.size),
25 dir: Direction,
26};
27
28fn io_impl(dir: Direction, io_type: u8, nr: u8, comptime T: type) u32 {
29 const request = Request{
30 .dir = dir,
31 .size = @sizeOf(T),
32 .io_type = io_type,
33 .nr = nr,
34 };
35 return @bitCast(u32, request);
36}
37
38pub fn IO(io_type: u8, nr: u8) u32 {
39 return io_impl(bits.none, io_type, nr, void);
40}
41
42pub fn IOR(io_type: u8, nr: u8, comptime T: type) u32 {
43 return io_impl(bits.read, io_type, nr, T);
44}
45
46pub fn IOW(io_type: u8, nr: u8, comptime T: type) u32 {
47 return io_impl(bits.write, io_type, nr, T);
48}
49
50pub fn IOWR(io_type: u8, nr: u8, comptime T: type) u32 {
51 return io_impl(bits.read | bits.write, io_type, nr, T);
52}
53
54comptime {
55 std.debug.assert(@bitSizeOf(Request) == 32);
56}