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// SPDX-License-Identifier: MIT
// Copyright (c) 2015-2021 Zig Contributors
// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
// The MIT license requires this copyright notice to be included in all copies
// and substantial portions of the software.
usingnamespace @import("../bits.zig");
pub fn syscall0(number: SYS) usize {
return asm volatile ("int $0x80"
: [ret] "={eax}" (-> usize)
: [number] "{eax}" (@enumToInt(number))
: "memory"
);
}
pub fn syscall1(number: SYS, arg1: usize) usize {
return asm volatile ("int $0x80"
: [ret] "={eax}" (-> usize)
: [number] "{eax}" (@enumToInt(number)),
[arg1] "{ebx}" (arg1)
: "memory"
);
}
pub fn syscall2(number: SYS, arg1: usize, arg2: usize) usize {
return asm volatile ("int $0x80"
: [ret] "={eax}" (-> usize)
: [number] "{eax}" (@enumToInt(number)),
[arg1] "{ebx}" (arg1),
[arg2] "{ecx}" (arg2)
: "memory"
);
}
pub fn syscall3(number: SYS, arg1: usize, arg2: usize, arg3: usize) usize {
return asm volatile ("int $0x80"
: [ret] "={eax}" (-> usize)
: [number] "{eax}" (@enumToInt(number)),
[arg1] "{ebx}" (arg1),
[arg2] "{ecx}" (arg2),
[arg3] "{edx}" (arg3)
: "memory"
);
}
pub fn syscall4(number: SYS, arg1: usize, arg2: usize, arg3: usize, arg4: usize) usize {
return asm volatile ("int $0x80"
: [ret] "={eax}" (-> usize)
: [number] "{eax}" (@enumToInt(number)),
[arg1] "{ebx}" (arg1),
[arg2] "{ecx}" (arg2),
[arg3] "{edx}" (arg3),
[arg4] "{esi}" (arg4)
: "memory"
);
}
pub fn syscall5(number: SYS, arg1: usize, arg2: usize, arg3: usize, arg4: usize, arg5: usize) usize {
return asm volatile ("int $0x80"
: [ret] "={eax}" (-> usize)
: [number] "{eax}" (@enumToInt(number)),
[arg1] "{ebx}" (arg1),
[arg2] "{ecx}" (arg2),
[arg3] "{edx}" (arg3),
[arg4] "{esi}" (arg4),
[arg5] "{edi}" (arg5)
: "memory"
);
}
pub fn syscall6(
number: SYS,
arg1: usize,
arg2: usize,
arg3: usize,
arg4: usize,
arg5: usize,
arg6: usize,
) usize {
// The 6th argument is passed via memory as we're out of registers if ebp is
// used as frame pointer. We push arg6 value on the stack before changing
// ebp or esp as the compiler may reference it as an offset relative to one
// of those two registers.
return asm volatile (
\\ push %[arg6]
\\ push %%ebp
\\ mov 4(%%esp), %%ebp
\\ int $0x80
\\ pop %%ebp
\\ add $4, %%esp
: [ret] "={eax}" (-> usize)
: [number] "{eax}" (@enumToInt(number)),
[arg1] "{ebx}" (arg1),
[arg2] "{ecx}" (arg2),
[arg3] "{edx}" (arg3),
[arg4] "{esi}" (arg4),
[arg5] "{edi}" (arg5),
[arg6] "rm" (arg6)
: "memory"
);
}
pub fn socketcall(call: usize, args: [*]usize) usize {
return asm volatile ("int $0x80"
: [ret] "={eax}" (-> usize)
: [number] "{eax}" (@enumToInt(SYS.socketcall)),
[arg1] "{ebx}" (call),
[arg2] "{ecx}" (@ptrToInt(args))
: "memory"
);
}
/// This matches the libc clone function.
pub extern fn clone(func: fn (arg: usize) callconv(.C) u8, stack: usize, flags: u32, arg: usize, ptid: *i32, tls: usize, ctid: *i32) usize;
pub fn restore() callconv(.Naked) void {
return asm volatile ("int $0x80"
:
: [number] "{eax}" (@enumToInt(SYS.sigreturn))
: "memory"
);
}
pub fn restore_rt() callconv(.Naked) void {
return asm volatile ("int $0x80"
:
: [number] "{eax}" (@enumToInt(SYS.rt_sigreturn))
: "memory"
);
}
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