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const SYS_read : usize = 0;
const SYS_write : usize = 1;
const SYS_exit : usize = 60;
const SYS_getrandom : usize = 318;
fn syscall1(number: usize, arg1: usize) usize => {
asm volatile ("syscall"
: [ret] "={rax}" (-> usize)
: [number] "{rax}" (number), [arg1] "{rdi}" (arg1)
: "rcx", "r11")
}
fn syscall3(number: usize, arg1: usize, arg2: usize, arg3: usize) usize => {
asm volatile ("syscall"
: [ret] "={rax}" (-> usize)
: [number] "{rax}" (number), [arg1] "{rdi}" (arg1), [arg2] "{rsi}" (arg2), [arg3] "{rdx}" (arg3)
: "rcx", "r11")
}
pub fn read(fd: isize, buf: &u8, count: usize) isize => {
isize(syscall3(SYS_read, usize(fd), usize(buf), count))
}
pub fn write(fd: isize, buf: &const u8, count: usize) isize => {
isize(syscall3(SYS_write, usize(fd), usize(buf), count))
}
pub fn exit(status: i32) unreachable => {
syscall1(SYS_exit, usize(status));
unreachable{}
}
pub fn getrandom(buf: &u8, count: usize, flags: u32) isize => {
isize(syscall3(SYS_getrandom, usize(buf), count, usize(flags)))
}
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