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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 ("svc #0"
: [ret] "={r0}" (-> u32),
: [number] "{r7}" (@intFromEnum(number)),
: .{ .memory = true });
}
pub fn syscall1(number: SYS, arg1: u32) u32 {
return asm volatile ("svc #0"
: [ret] "={r0}" (-> u32),
: [number] "{r7}" (@intFromEnum(number)),
[arg1] "{r0}" (arg1),
: .{ .memory = true });
}
pub fn syscall2(number: SYS, arg1: u32, arg2: u32) u32 {
return asm volatile ("svc #0"
: [ret] "={r0}" (-> u32),
: [number] "{r7}" (@intFromEnum(number)),
[arg1] "{r0}" (arg1),
[arg2] "{r1}" (arg2),
: .{ .memory = true });
}
pub fn syscall3(number: SYS, arg1: u32, arg2: u32, arg3: u32) u32 {
return asm volatile ("svc #0"
: [ret] "={r0}" (-> u32),
: [number] "{r7}" (@intFromEnum(number)),
[arg1] "{r0}" (arg1),
[arg2] "{r1}" (arg2),
[arg3] "{r2}" (arg3),
: .{ .memory = true });
}
pub fn syscall4(number: SYS, arg1: u32, arg2: u32, arg3: u32, arg4: u32) u32 {
return asm volatile ("svc #0"
: [ret] "={r0}" (-> u32),
: [number] "{r7}" (@intFromEnum(number)),
[arg1] "{r0}" (arg1),
[arg2] "{r1}" (arg2),
[arg3] "{r2}" (arg3),
[arg4] "{r3}" (arg4),
: .{ .memory = true });
}
pub fn syscall5(number: SYS, arg1: u32, arg2: u32, arg3: u32, arg4: u32, arg5: u32) u32 {
return asm volatile ("svc #0"
: [ret] "={r0}" (-> u32),
: [number] "{r7}" (@intFromEnum(number)),
[arg1] "{r0}" (arg1),
[arg2] "{r1}" (arg2),
[arg3] "{r2}" (arg3),
[arg4] "{r3}" (arg4),
[arg5] "{r4}" (arg5),
: .{ .memory = true });
}
pub fn syscall6(
number: SYS,
arg1: u32,
arg2: u32,
arg3: u32,
arg4: u32,
arg5: u32,
arg6: u32,
) u32 {
return asm volatile ("svc #0"
: [ret] "={r0}" (-> u32),
: [number] "{r7}" (@intFromEnum(number)),
[arg1] "{r0}" (arg1),
[arg2] "{r1}" (arg2),
[arg3] "{r2}" (arg3),
[arg4] "{r3}" (arg4),
[arg5] "{r4}" (arg5),
[arg6] "{r5}" (arg6),
: .{ .memory = true });
}
pub fn clone() callconv(.naked) u32 {
// __clone(func, stack, flags, arg, ptid, tls, ctid)
// r0, r1, r2, r3, +0, +4, +8
//
// syscall(SYS_clone, flags, stack, ptid, tls, ctid)
// r7 r0, r1, r2, r3, r4
asm volatile (
\\ stmfd sp!,{r4,r5,r6,r7}
\\ mov r7,#120 // SYS_clone
\\ mov r6,r3
\\ mov r5,r0
\\ mov r0,r2
\\ and r1,r1,#-16
\\ ldr r2,[sp,#16]
\\ ldr r3,[sp,#20]
\\ ldr r4,[sp,#24]
\\ svc 0
\\ tst r0,r0
\\ beq 1f
\\ ldmfd sp!,{r4,r5,r6,r7}
\\ bx lr
\\
\\ // https://github.com/llvm/llvm-project/issues/115891
\\1: mov r7, #0
\\ mov r11, #0
\\ mov lr, #0
\\
\\ mov r0,r6
\\ bl 3f
\\ mov r7,#1 // SYS_exit
\\ svc 0
\\
\\3: bx r5
);
}
pub fn restore() callconv(.naked) noreturn {
switch (builtin.zig_backend) {
.stage2_c => asm volatile (
\\ mov r7, %[number]
\\ svc #0
:
: [number] "I" (@intFromEnum(SYS.sigreturn)),
),
else => asm volatile (
\\ svc #0
:
: [number] "{r7}" (@intFromEnum(SYS.sigreturn)),
),
}
}
pub fn restore_rt() callconv(.naked) noreturn {
switch (builtin.zig_backend) {
.stage2_c => asm volatile (
\\ mov r7, %[number]
\\ svc #0
:
: [number] "I" (@intFromEnum(SYS.rt_sigreturn)),
),
else => asm volatile (
\\ svc #0
:
: [number] "{r7}" (@intFromEnum(SYS.rt_sigreturn)),
),
}
}
pub const VDSO = struct {
pub const CGT_SYM = "__vdso_clock_gettime";
pub const CGT_VER = "LINUX_2.6";
};
pub const HWCAP = struct {
pub const SWP = 1 << 0;
pub const HALF = 1 << 1;
pub const THUMB = 1 << 2;
pub const @"26BIT" = 1 << 3;
pub const FAST_MULT = 1 << 4;
pub const FPA = 1 << 5;
pub const VFP = 1 << 6;
pub const EDSP = 1 << 7;
pub const JAVA = 1 << 8;
pub const IWMMXT = 1 << 9;
pub const CRUNCH = 1 << 10;
pub const THUMBEE = 1 << 11;
pub const NEON = 1 << 12;
pub const VFPv3 = 1 << 13;
pub const VFPv3D16 = 1 << 14;
pub const TLS = 1 << 15;
pub const VFPv4 = 1 << 16;
pub const IDIVA = 1 << 17;
pub const IDIVT = 1 << 18;
pub const VFPD32 = 1 << 19;
pub const IDIV = IDIVA | IDIVT;
pub const LPAE = 1 << 20;
pub const EVTSTRM = 1 << 21;
};
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;
// The `stat` definition used by the Linux kernel.
pub const Stat = extern struct {
dev: dev_t,
__dev_padding: u32,
__ino_truncated: u32,
mode: mode_t,
nlink: nlink_t,
uid: std.os.linux.uid_t,
gid: std.os.linux.gid_t,
rdev: dev_t,
__rdev_padding: u32,
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;
}
};
|
