23 lines
541 B
Rust
23 lines
541 B
Rust
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#[naked]
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pub unsafe extern fn syscall() {
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extern {
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fn syscall(a: usize, b: usize, c: usize, d: usize, e: usize, f: usize) -> usize;
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}
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let a;
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let b;
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let c;
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let d;
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let e;
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let f;
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asm!("" : "={rax}"(a), "={rbx}"(b), "={rcx}"(c), "={rdx}"(d), "={rsi}"(e), "={rdi}"(f)
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: : : "intel", "volatile");
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let a = syscall(a, b, c, d, e, f);
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asm!("" : : "{rax}"(a) : : "intel", "volatile");
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// Pop scratch registers, error code, and return
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asm!("iretq" : : : : "intel", "volatile");
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}
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