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const builtin = @import("builtin");
const std = @import("../../std.zig");
const SYS = std.os.linux.SYS;
pub fn syscall0(number: SYS) u64 {
return asm volatile ("svc #0"
: [ret] "={x0}" (-> u64),
: [number] "{x8}" (@intFromEnum(number)),
: .{ .memory = true });
}
pub fn syscall1(number: SYS, arg1: u64) u64 {
return asm volatile ("svc #0"
: [ret] "={x0}" (-> u64),
: [number] "{x8}" (@intFromEnum(number)),
[arg1] "{x0}" (arg1),
: .{ .memory = true });
}
pub fn syscall2(number: SYS, arg1: u64, arg2: u64) u64 {
return asm volatile ("svc #0"
: [ret] "={x0}" (-> u64),
: [number] "{x8}" (@intFromEnum(number)),
[arg1] "{x0}" (arg1),
[arg2] "{x1}" (arg2),
: .{ .memory = true });
}
pub fn syscall3(number: SYS, arg1: u64, arg2: u64, arg3: u64) u64 {
return asm volatile ("svc #0"
: [ret] "={x0}" (-> u64),
: [number] "{x8}" (@intFromEnum(number)),
[arg1] "{x0}" (arg1),
[arg2] "{x1}" (arg2),
[arg3] "{x2}" (arg3),
: .{ .memory = true });
}
pub fn syscall4(number: SYS, arg1: u64, arg2: u64, arg3: u64, arg4: u64) u64 {
return asm volatile ("svc #0"
: [ret] "={x0}" (-> u64),
: [number] "{x8}" (@intFromEnum(number)),
[arg1] "{x0}" (arg1),
[arg2] "{x1}" (arg2),
[arg3] "{x2}" (arg3),
[arg4] "{x3}" (arg4),
: .{ .memory = true });
}
pub fn syscall5(number: SYS, arg1: u64, arg2: u64, arg3: u64, arg4: u64, arg5: u64) u64 {
return asm volatile ("svc #0"
: [ret] "={x0}" (-> u64),
: [number] "{x8}" (@intFromEnum(number)),
[arg1] "{x0}" (arg1),
[arg2] "{x1}" (arg2),
[arg3] "{x2}" (arg3),
[arg4] "{x3}" (arg4),
[arg5] "{x4}" (arg5),
: .{ .memory = true });
}
pub fn syscall6(
number: SYS,
arg1: u64,
arg2: u64,
arg3: u64,
arg4: u64,
arg5: u64,
arg6: u64,
) u64 {
return asm volatile ("svc #0"
: [ret] "={x0}" (-> u64),
: [number] "{x8}" (@intFromEnum(number)),
[arg1] "{x0}" (arg1),
[arg2] "{x1}" (arg2),
[arg3] "{x2}" (arg3),
[arg4] "{x3}" (arg4),
[arg5] "{x4}" (arg5),
[arg6] "{x5}" (arg6),
: .{ .memory = true });
}
pub fn clone() callconv(.naked) u64 {
// __clone(func, stack, flags, arg, ptid, tls, ctid)
// x0, x1, w2, x3, x4, x5, x6
//
// syscall(SYS_clone, flags, stack, ptid, tls, ctid)
// x8, x0, x1, x2, x3, x4
asm volatile (
\\ // align stack and save func,arg
\\ and x1,x1,#-16
\\ stp x0,x3,[x1,#-16]!
\\
\\ // syscall
\\ uxtw x0,w2
\\ mov x2,x4
\\ mov x3,x5
\\ mov x4,x6
\\ mov x8,#220 // SYS_clone
\\ svc #0
\\
\\ cbz x0,1f
\\ // parent
\\ ret
\\
\\ // child
\\1:
);
if (builtin.unwind_tables != .none or !builtin.strip_debug_info) asm volatile (
\\ .cfi_undefined lr
);
asm volatile (
\\ mov fp, 0
\\ mov lr, 0
\\
\\ ldp x1,x0,[sp],#16
\\ blr x1
\\ mov x8,#93 // SYS_exit
\\ svc #0
);
}
pub const restore = restore_rt;
pub fn restore_rt() callconv(.naked) noreturn {
switch (builtin.zig_backend) {
.stage2_c => asm volatile (
\\ mov x8, %[number]
\\ svc #0
:
: [number] "i" (@intFromEnum(SYS.rt_sigreturn)),
),
else => asm volatile (
\\ svc #0
:
: [number] "{x8}" (@intFromEnum(SYS.rt_sigreturn)),
),
}
}
pub const VDSO = struct {
pub const CGT_SYM = "__kernel_clock_gettime";
pub const CGT_VER = "LINUX_2.6.39";
};
pub const blksize_t = i32;
pub const nlink_t = u32;
pub const time_t = i64;
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;
// The `stat` definition used by the Linux kernel.
pub const Stat = extern struct {
dev: dev_t,
ino: ino_t,
mode: mode_t,
nlink: nlink_t,
uid: std.os.linux.uid_t,
gid: std.os.linux.gid_t,
rdev: dev_t,
__pad: u64,
size: off_t,
blksize: blksize_t,
__pad2: i32,
blocks: blkcnt_t,
atim: std.os.linux.timespec,
mtim: std.os.linux.timespec,
ctim: std.os.linux.timespec,
__unused: [2]u32,
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;
}
};
|
