Zig 0.17.0-dev (Split by item)

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syscall1

thumb.syscall1

pub fn syscall1(
    number: SYS,
    arg1: syscall_arg_t,
) u32

File

lib/std/os/linux/thumb.zig:26

Code

pub fn syscall1(
    number: SYS,
    arg1: syscall_arg_t,
) u32 {
    var buf: [2]syscall_arg_t = .{ @backingInt(number), undefined };
    return asm volatile (
        \\ str r7, [%[tmp], #4]
        \\ ldr r7, [%[tmp]]
        \\ svc #0
        \\ ldr r7, [%[tmp], #4]
        : [ret] "={r0}" (-> u32),
        : [tmp] "{r1}" (&buf),
          [arg1] "{r0}" (arg1),
        : .{ .memory = true });
}