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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 ("ecall"
: [ret] "={x10}" (-> u32),
: [number] "{x17}" (@intFromEnum(number)),
: .{ .memory = true });
}
pub fn syscall1(number: SYS, arg1: u32) u32 {
return asm volatile ("ecall"
: [ret] "={x10}" (-> u32),
: [number] "{x17}" (@intFromEnum(number)),
[arg1] "{x10}" (arg1),
: .{ .memory = true });
}
pub fn syscall2(number: SYS, arg1: u32, arg2: u32) u32 {
return asm volatile ("ecall"
: [ret] "={x10}" (-> u32),
: [number] "{x17}" (@intFromEnum(number)),
[arg1] "{x10}" (arg1),
[arg2] "{x11}" (arg2),
: .{ .memory = true });
}
pub fn syscall3(number: SYS, arg1: u32, arg2: u32, arg3: u32) u32 {
return asm volatile ("ecall"
: [ret] "={x10}" (-> u32),
: [number] "{x17}" (@intFromEnum(number)),
[arg1] "{x10}" (arg1),
[arg2] "{x11}" (arg2),
[arg3] "{x12}" (arg3),
: .{ .memory = true });
}
pub fn syscall4(number: SYS, arg1: u32, arg2: u32, arg3: u32, arg4: u32) u32 {
return asm volatile ("ecall"
: [ret] "={x10}" (-> u32),
: [number] "{x17}" (@intFromEnum(number)),
[arg1] "{x10}" (arg1),
[arg2] "{x11}" (arg2),
[arg3] "{x12}" (arg3),
[arg4] "{x13}" (arg4),
: .{ .memory = true });
}
pub fn syscall5(number: SYS, arg1: u32, arg2: u32, arg3: u32, arg4: u32, arg5: u32) u32 {
return asm volatile ("ecall"
: [ret] "={x10}" (-> u32),
: [number] "{x17}" (@intFromEnum(number)),
[arg1] "{x10}" (arg1),
[arg2] "{x11}" (arg2),
[arg3] "{x12}" (arg3),
[arg4] "{x13}" (arg4),
[arg5] "{x14}" (arg5),
: .{ .memory = true });
}
pub fn syscall6(
number: SYS,
arg1: u32,
arg2: u32,
arg3: u32,
arg4: u32,
arg5: u32,
arg6: u32,
) u32 {
return asm volatile ("ecall"
: [ret] "={x10}" (-> u32),
: [number] "{x17}" (@intFromEnum(number)),
[arg1] "{x10}" (arg1),
[arg2] "{x11}" (arg2),
[arg3] "{x12}" (arg3),
[arg4] "{x13}" (arg4),
[arg5] "{x14}" (arg5),
[arg6] "{x15}" (arg6),
: .{ .memory = true });
}
pub fn clone() callconv(.naked) u32 {
// __clone(func, stack, flags, arg, ptid, tls, ctid)
// a0, a1, a2, a3, a4, a5, a6
//
// syscall(SYS_clone, flags, stack, ptid, tls, ctid)
// a7 a0, a1, a2, a3, a4
asm volatile (
\\ # Save func and arg to stack
\\ addi a1, a1, -8
\\ sw a0, 0(a1)
\\ sw a3, 4(a1)
\\
\\ # Call SYS_clone
\\ mv a0, a2
\\ mv a2, a4
\\ mv a3, a5
\\ mv a4, a6
\\ li a7, 220 # SYS_clone
\\ ecall
\\
\\ beqz a0, 1f
\\ # Parent
\\ ret
\\
\\ # Child
\\1:
);
if (builtin.unwind_tables != .none or !builtin.strip_debug_info) asm volatile (
\\ .cfi_undefined ra
);
asm volatile (
\\ mv fp, zero
\\ mv ra, zero
\\
\\ lw a1, 0(sp)
\\ lw a0, 4(sp)
\\ jalr a1
\\
\\ # Exit
\\ li a7, 93 # SYS_exit
\\ ecall
);
}
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: u32,
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;
}
};
pub const VDSO = struct {
pub const CGT_SYM = "__vdso_clock_gettime";
pub const CGT_VER = "LINUX_4.15";
};
|
