Macro raw_syscall 

macro_rules! raw_syscall {
    ([ro] $sysno:expr, $arg0:expr, $arg1:expr, $arg2:expr, $arg3:expr, $arg4:expr, $arg5:expr $(,)?) => { ... };
    ([ro] $sysno:expr, $arg0:expr, $arg1:expr, $arg2:expr, $arg3:expr, $arg4:expr $(,)?) => { ... };
    ([ro] $sysno:expr, $arg0:expr, $arg1:expr, $arg2:expr, $arg3:expr $(,)?) => { ... };
    ([ro] $sysno:expr, $arg0:expr, $arg1:expr, $arg2:expr $(,)?) => { ... };
    ([ro] $sysno:expr, $arg0:expr, $arg1:expr $(,)?) => { ... };
    ([!] $sysno:expr, $arg0:expr $(,)?) => { ... };
    ([ro] $sysno:expr, $arg0:expr $(,)?) => { ... };
    ([ro] $sysno:expr $(,)?) => { ... };
    ($sysno:expr, $arg0:expr, $arg1:expr, $arg2:expr, $arg3:expr, $arg4:expr, $arg5:expr $(,)?) => { ... };
    ($sysno:expr, $arg0:expr, $arg1:expr, $arg2:expr, $arg3:expr, $arg4:expr $(,)?) => { ... };
    ($sysno:expr, $arg0:expr, $arg1:expr, $arg2:expr, $arg3:expr $(,)?) => { ... };
    ($sysno:expr, $arg0:expr, $arg1:expr, $arg2:expr $(,)?) => { ... };
    ($sysno:expr, $arg0:expr, $arg1:expr $(,)?) => { ... };
    ($sysno:expr, $arg0:expr $(,)?) => { ... };
    ($sysno:expr $(,)?) => { ... };
}

Available on (Linux or Android) and (x86-64 and little-endian and 64-bit, or AArch64 and 64-bit, or ARM and 32-bit, or x86 and little-endian and 32-bit), or Linux and (x86-64 and little-endian and 32-bit, or RISC-V RV64 and little-endian and 64-bit, or RISC-V RV32 and little-endian and 32-bit, or MIPS and 32-bit, or MIPS-64 and 64-bit, or s390x and big-endian and 64-bit, or LoongArch LA64 and little-endian and 64-bit, or PowerPC and big-endian and 32-bit, or PowerPC-64 and 64-bit) only.

Make a syscall and returns a usize

Accept a Sysno as the first parameter and a variable number of arguments (0 to 6). It calls syscallN under the hood where N is the number of arguments.

The are two variations:

• [ro]: use the _readonly version of raw_syscallN.
• [!]: use the _noreturn version of syscall1 (useful for exit).

Use the previous tags if you what are you doing, otherwise you can omit them.

Example

use linux_syscalls::{Sysno, raw_syscall};

println!("{}", raw_syscall!([ro] Sysno::brk, 0));

// [!] because exit do not return.
unsafe { raw_syscall!([!] Sysno::exit, 0) };