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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 (
\\ syscall
\\ blez $7, 1f
\\ subu $2, $0, $2
\\ 1:
: [ret] "={$2}" (-> usize)
: [number] "{$2}" (@enumToInt(number))
: "memory", "cc", "$7"
);
}
pub fn syscall_pipe(fd: *[2]i32) usize {
return asm volatile (
\\ .set noat
\\ .set noreorder
\\ syscall
\\ blez $7, 1f
\\ nop
\\ b 2f
\\ subu $2, $0, $2
\\ 1:
\\ sw $2, 0($4)
\\ sw $3, 4($4)
\\ 2:
: [ret] "={$2}" (-> usize)
: [number] "{$2}" (@enumToInt(SYS.pipe)),
[fd] "{$4}" (fd)
: "memory", "cc", "$7"
);
}
pub fn syscall1(number: SYS, arg1: usize) usize {
return asm volatile (
\\ syscall
\\ blez $7, 1f
\\ subu $2, $0, $2
\\ 1:
: [ret] "={$2}" (-> usize)
: [number] "{$2}" (@enumToInt(number)),
[arg1] "{$4}" (arg1)
: "memory", "cc", "$7"
);
}
pub fn syscall2(number: SYS, arg1: usize, arg2: usize) usize {
return asm volatile (
\\ syscall
\\ blez $7, 1f
\\ subu $2, $0, $2
\\ 1:
: [ret] "={$2}" (-> usize)
: [number] "{$2}" (@enumToInt(number)),
[arg1] "{$4}" (arg1),
[arg2] "{$5}" (arg2)
: "memory", "cc", "$7"
);
}
pub fn syscall3(number: SYS, arg1: usize, arg2: usize, arg3: usize) usize {
return asm volatile (
\\ syscall
\\ blez $7, 1f
\\ subu $2, $0, $2
\\ 1:
: [ret] "={$2}" (-> usize)
: [number] "{$2}" (@enumToInt(number)),
[arg1] "{$4}" (arg1),
[arg2] "{$5}" (arg2),
[arg3] "{$6}" (arg3)
: "memory", "cc", "$7"
);
}
pub fn syscall4(number: SYS, arg1: usize, arg2: usize, arg3: usize, arg4: usize) usize {
return asm volatile (
\\ syscall
\\ blez $7, 1f
\\ subu $2, $0, $2
\\ 1:
: [ret] "={$2}" (-> usize)
: [number] "{$2}" (@enumToInt(number)),
[arg1] "{$4}" (arg1),
[arg2] "{$5}" (arg2),
[arg3] "{$6}" (arg3),
[arg4] "{$7}" (arg4)
: "memory", "cc", "$7"
);
}
pub fn syscall5(number: SYS, arg1: usize, arg2: usize, arg3: usize, arg4: usize, arg5: usize) usize {
return asm volatile (
\\ .set noat
\\ subu $sp, $sp, 24
\\ sw %[arg5], 16($sp)
\\ syscall
\\ addu $sp, $sp, 24
\\ blez $7, 1f
\\ subu $2, $0, $2
\\ 1:
: [ret] "={$2}" (-> usize)
: [number] "{$2}" (@enumToInt(number)),
[arg1] "{$4}" (arg1),
[arg2] "{$5}" (arg2),
[arg3] "{$6}" (arg3),
[arg4] "{$7}" (arg4),
[arg5] "r" (arg5)
: "memory", "cc", "$7"
);
}
// NOTE: The o32 calling convention requires the callee to reserve 16 bytes for
// the first four arguments even though they're passed in $a0-$a3.
pub fn syscall6(
number: SYS,
arg1: usize,
arg2: usize,
arg3: usize,
arg4: usize,
arg5: usize,
arg6: usize,
) usize {
return asm volatile (
\\ .set noat
\\ subu $sp, $sp, 24
\\ sw %[arg5], 16($sp)
\\ sw %[arg6], 20($sp)
\\ syscall
\\ addu $sp, $sp, 24
\\ blez $7, 1f
\\ subu $2, $0, $2
\\ 1:
: [ret] "={$2}" (-> usize)
: [number] "{$2}" (@enumToInt(number)),
[arg1] "{$4}" (arg1),
[arg2] "{$5}" (arg2),
[arg3] "{$6}" (arg3),
[arg4] "{$7}" (arg4),
[arg5] "r" (arg5),
[arg6] "r" (arg6)
: "memory", "cc", "$7"
);
}
pub fn syscall7(
number: SYS,
arg1: usize,
arg2: usize,
arg3: usize,
arg4: usize,
arg5: usize,
arg6: usize,
arg7: usize,
) usize {
return asm volatile (
\\ .set noat
\\ subu $sp, $sp, 32
\\ sw %[arg5], 16($sp)
\\ sw %[arg6], 20($sp)
\\ sw %[arg7], 24($sp)
\\ syscall
\\ addu $sp, $sp, 32
\\ blez $7, 1f
\\ subu $2, $0, $2
\\ 1:
: [ret] "={$2}" (-> usize)
: [number] "{$2}" (@enumToInt(number)),
[arg1] "{$4}" (arg1),
[arg2] "{$5}" (arg2),
[arg3] "{$6}" (arg3),
[arg4] "{$7}" (arg4),
[arg5] "r" (arg5),
[arg6] "r" (arg6),
[arg7] "r" (arg7)
: "memory", "cc", "$7"
);
}
/// 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 ("syscall"
:
: [number] "{$2}" (@enumToInt(SYS.sigreturn))
: "memory", "cc", "$7"
);
}
pub fn restore_rt() callconv(.Naked) void {
return asm volatile ("syscall"
:
: [number] "{$2}" (@enumToInt(SYS.rt_sigreturn))
: "memory", "cc", "$7"
);
}
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