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const builtin = @import("builtin");
const std = @import("../../std.zig");
const SYS = std.os.linux.SYS;
pub fn syscall0(number: SYS) u32 {
return asm volatile ("trap #0"
: [ret] "={d0}" (-> u32),
: [number] "{d0}" (@intFromEnum(number)),
: .{ .memory = true });
}
pub fn syscall1(number: SYS, arg1: u32) u32 {
return asm volatile ("trap #0"
: [ret] "={d0}" (-> u32),
: [number] "{d0}" (@intFromEnum(number)),
[arg1] "{d1}" (arg1),
: .{ .memory = true });
}
pub fn syscall2(number: SYS, arg1: u32, arg2: u32) u32 {
return asm volatile ("trap #0"
: [ret] "={d0}" (-> u32),
: [number] "{d0}" (@intFromEnum(number)),
[arg1] "{d1}" (arg1),
[arg2] "{d2}" (arg2),
: .{ .memory = true });
}
pub fn syscall3(number: SYS, arg1: u32, arg2: u32, arg3: u32) u32 {
return asm volatile ("trap #0"
: [ret] "={d0}" (-> u32),
: [number] "{d0}" (@intFromEnum(number)),
[arg1] "{d1}" (arg1),
[arg2] "{d2}" (arg2),
[arg3] "{d3}" (arg3),
: .{ .memory = true });
}
pub fn syscall4(number: SYS, arg1: u32, arg2: u32, arg3: u32, arg4: u32) u32 {
return asm volatile ("trap #0"
: [ret] "={d0}" (-> u32),
: [number] "{d0}" (@intFromEnum(number)),
[arg1] "{d1}" (arg1),
[arg2] "{d2}" (arg2),
[arg3] "{d3}" (arg3),
[arg4] "{d4}" (arg4),
: .{ .memory = true });
}
pub fn syscall5(number: SYS, arg1: u32, arg2: u32, arg3: u32, arg4: u32, arg5: u32) u32 {
return asm volatile ("trap #0"
: [ret] "={d0}" (-> u32),
: [number] "{d0}" (@intFromEnum(number)),
[arg1] "{d1}" (arg1),
[arg2] "{d2}" (arg2),
[arg3] "{d3}" (arg3),
[arg4] "{d4}" (arg4),
[arg5] "{d5}" (arg5),
: .{ .memory = true });
}
pub fn syscall6(
number: SYS,
arg1: u32,
arg2: u32,
arg3: u32,
arg4: u32,
arg5: u32,
arg6: u32,
) u32 {
return asm volatile ("trap #0"
: [ret] "={d0}" (-> u32),
: [number] "{d0}" (@intFromEnum(number)),
[arg1] "{d1}" (arg1),
[arg2] "{d2}" (arg2),
[arg3] "{d3}" (arg3),
[arg4] "{d4}" (arg4),
[arg5] "{d5}" (arg5),
[arg6] "{a0}" (arg6),
: .{ .memory = true });
}
pub fn clone() callconv(.naked) u32 {
// __clone(func, stack, flags, arg, ptid, tls, ctid)
// +4, +8, +12, +16, +20, +24, +28
//
// syscall(SYS_clone, flags, stack, ptid, ctid, tls)
// d0, d1, d2, d3, d4, d5
asm volatile (
\\ // Save callee-saved registers.
\\ movem.l %%d2-%%d5, -(%%sp) // sp -= 16
\\
\\ // Save func and arg.
\\ move.l 16+4(%%sp), %%a0
\\ move.l 16+16(%%sp), %%a1
\\
\\ // d0 = syscall(d0, d1, d2, d3, d4, d5)
\\ move.l #120, %%d0 // SYS_clone
\\ move.l 16+12(%%sp), %%d1
\\ move.l 16+8(%%sp), %%d2
\\ move.l 16+20(%%sp), %%d3
\\ move.l 16+28(%%sp), %%d4
\\ move.l 16+24(%%sp), %%d5
\\ and.l #-4, %%d2 // Align the child stack pointer.
\\ trap #0
\\
\\ // Are we in the parent or child?
\\ tst.l %%d0
\\ beq 1f
\\ // Parent:
\\
\\ // Restore callee-saved registers and return.
\\ movem.l (%%sp)+, %%d2-%%d5 // sp += 16
\\ rts
\\
\\ // Child:
\\1:
);
if (builtin.unwind_tables != .none or !builtin.strip_debug_info) asm volatile (
\\ .cfi_undefined %%pc
);
asm volatile (
\\ suba.l %%fp, %%fp
\\
\\ // d0 = func(a1)
\\ move.l %%a1, -(%%sp)
\\ jsr (%%a0)
\\
\\ // syscall(d0, d1)
\\ move.l %%d0, %%d1
\\ move.l #1, %%d0 // SYS_exit
\\ trap #0
);
}
pub const restore = restore_rt;
pub fn restore_rt() callconv(.naked) noreturn {
asm volatile ("trap #0"
:
: [number] "{d0}" (@intFromEnum(SYS.rt_sigreturn)),
);
}
pub const blksize_t = i32;
pub const nlink_t = u32;
pub const time_t = i32;
pub const mode_t = u32;
pub const off_t = i64;
pub const ino_t = u64;
pub const dev_t = u64;
pub const blkcnt_t = i64;
pub const Stat = extern struct {
dev: dev_t,
__pad: i16,
__ino_truncated: i32,
mode: mode_t,
nlink: nlink_t,
uid: std.os.linux.uid_t,
gid: std.os.linux.gid_t,
rdev: dev_t,
__pad2: i16,
size: off_t,
blksize: blksize_t,
blocks: blkcnt_t,
atim: std.os.linux.timespec,
mtim: std.os.linux.timespec,
ctim: std.os.linux.timespec,
ino: ino_t,
pub fn atime(self: @This()) std.os.linux.timespec {
return self.atim;
}
pub fn mtime(self: @This()) std.os.linux.timespec {
return self.mtim;
}
pub fn ctime(self: @This()) std.os.linux.timespec {
return self.ctim;
}
};
// No VDSO used as of glibc 112a0ae18b831bf31f44d81b82666980312511d6.
pub const VDSO = void;
|
