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//! System runtime
pub const start = @import("start.zig");
comptime {
_ = start;
}
pub const Invocation = enum(u64) {
exit = 0x01,
attach = 0x02,
seal = 0x03,
view = 0x04,
mark = 0x05,
spawn = 0x06,
wait = 0x07,
yield = 0x08,
getkeychar = 0x09,
viewstack = 0x0A,
getlocation = 0x0B,
setlocation = 0x0C,
postman = 0x0D,
wipe = 0x0E,
cpuinfo = 0x0F,
meminfo = 0x10,
uptime = 0x11,
gettime = 0x12,
diskinfo = 0x13,
reap = 0x14,
};
pub inline fn syscall(invocation: Invocation, args: anytype) u64 {
const Args = @TypeOf(args);
const fields = @typeInfo(Args).@"struct".fields;
const arg0: u64 = if (fields.len > 0) toU64(args[0]) else 0;
const arg1: u64 = if (fields.len > 1) toU64(args[1]) else 0;
const arg2: u64 = if (fields.len > 2) toU64(args[2]) else 0;
const arg3: u64 = if (fields.len > 3) toU64(args[3]) else 0;
const arg4: u64 = if (fields.len > 4) toU64(args[4]) else 0;
const arg5: u64 = if (fields.len > 5) toU64(args[5]) else 0;
return asm volatile ("syscall"
: [ret] "={rax}" (-> u64),
: [number] "{rax}" (@intFromEnum(invocation)),
[arg0] "{rdi}" (arg0),
[arg1] "{rsi}" (arg1),
[arg2] "{rdx}" (arg2),
[arg3] "{r10}" (arg3),
[arg4] "{r8}" (arg4),
[arg5] "{r9}" (arg5),
: .{ .rcx = true, .r11 = true, .memory = true });
}
inline fn toU64(value: anytype) u64 {
const T = @TypeOf(value);
return switch (@typeInfo(T)) {
.int, .comptime_int => @intCast(value),
.pointer => @intFromPtr(value),
.@"enum" => @intFromEnum(value),
else => @bitCast(value),
};
}
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