|
| 1 | +const builtin = @import("builtin"); |
| 2 | +const std = @import("../../std.zig"); |
| 3 | +const SYS = std.os.linux.SYS; |
| 4 | + |
| 5 | +pub fn syscall0(number: SYS) u32 { |
| 6 | + return asm volatile ( |
| 7 | + \\ l.sys 1 |
| 8 | + : [ret] "={r11}" (-> u32), |
| 9 | + : [number] "{r11}" (@intFromEnum(number)), |
| 10 | + : .{ .r3 = true, .r4 = true, .r5 = true, .r6 = true, .r7 = true, .r8 = true, .r12 = true, .r13 = true, .r15 = true, .r17 = true, .r19 = true, .r21 = true, .r23 = true, .r25 = true, .r27 = true, .r29 = true, .r31 = true, .memory = true }); |
| 11 | +} |
| 12 | + |
| 13 | +pub fn syscall1(number: SYS, arg1: u32) u32 { |
| 14 | + return asm volatile ( |
| 15 | + \\ l.sys 1 |
| 16 | + : [ret] "={r11}" (-> u32), |
| 17 | + : [number] "{r11}" (@intFromEnum(number)), |
| 18 | + [arg1] "{r3}" (arg1), |
| 19 | + : .{ .r4 = true, .r5 = true, .r6 = true, .r7 = true, .r8 = true, .r12 = true, .r13 = true, .r15 = true, .r17 = true, .r19 = true, .r21 = true, .r23 = true, .r25 = true, .r27 = true, .r29 = true, .r31 = true, .memory = true }); |
| 20 | +} |
| 21 | + |
| 22 | +pub fn syscall2(number: SYS, arg1: u32, arg2: u32) u32 { |
| 23 | + return asm volatile ( |
| 24 | + \\ l.sys 1 |
| 25 | + : [ret] "={r11}" (-> u32), |
| 26 | + : [number] "{r11}" (@intFromEnum(number)), |
| 27 | + [arg1] "{r3}" (arg1), |
| 28 | + [arg2] "{r4}" (arg2), |
| 29 | + : .{ .r5 = true, .r6 = true, .r7 = true, .r8 = true, .r12 = true, .r13 = true, .r15 = true, .r17 = true, .r19 = true, .r21 = true, .r23 = true, .r25 = true, .r27 = true, .r29 = true, .r31 = true, .memory = true }); |
| 30 | +} |
| 31 | + |
| 32 | +pub fn syscall3(number: SYS, arg1: u32, arg2: u32, arg3: u32) u32 { |
| 33 | + return asm volatile ( |
| 34 | + \\ l.sys 1 |
| 35 | + : [ret] "={r11}" (-> u32), |
| 36 | + : [number] "{r11}" (@intFromEnum(number)), |
| 37 | + [arg1] "{r3}" (arg1), |
| 38 | + [arg2] "{r4}" (arg2), |
| 39 | + [arg3] "{r5}" (arg3), |
| 40 | + : .{ .r6 = true, .r7 = true, .r8 = true, .r12 = true, .r13 = true, .r15 = true, .r17 = true, .r19 = true, .r21 = true, .r23 = true, .r25 = true, .r27 = true, .r29 = true, .r31 = true, .memory = true }); |
| 41 | +} |
| 42 | + |
| 43 | +pub fn syscall4(number: SYS, arg1: u32, arg2: u32, arg3: u32, arg4: u32) u32 { |
| 44 | + return asm volatile ( |
| 45 | + \\ l.sys 1 |
| 46 | + : [ret] "={r11}" (-> u32), |
| 47 | + : [number] "{r11}" (@intFromEnum(number)), |
| 48 | + [arg1] "{r3}" (arg1), |
| 49 | + [arg2] "{r4}" (arg2), |
| 50 | + [arg3] "{r5}" (arg3), |
| 51 | + [arg4] "{r6}" (arg4), |
| 52 | + : .{ .r7 = true, .r8 = true, .r12 = true, .r13 = true, .r15 = true, .r17 = true, .r19 = true, .r21 = true, .r23 = true, .r25 = true, .r27 = true, .r29 = true, .r31 = true, .memory = true }); |
| 53 | +} |
| 54 | + |
| 55 | +pub fn syscall5(number: SYS, arg1: u32, arg2: u32, arg3: u32, arg4: u32, arg5: u32) u32 { |
| 56 | + return asm volatile ( |
| 57 | + \\ l.sys 1 |
| 58 | + : [ret] "={r11}" (-> u32), |
| 59 | + : [number] "{r11}" (@intFromEnum(number)), |
| 60 | + [arg1] "{r3}" (arg1), |
| 61 | + [arg2] "{r4}" (arg2), |
| 62 | + [arg3] "{r5}" (arg3), |
| 63 | + [arg4] "{r6}" (arg4), |
| 64 | + [arg5] "{r7}" (arg5), |
| 65 | + : .{ .r8 = true, .r12 = true, .r13 = true, .r15 = true, .r17 = true, .r19 = true, .r21 = true, .r23 = true, .r25 = true, .r27 = true, .r29 = true, .r31 = true, .memory = true }); |
| 66 | +} |
| 67 | + |
| 68 | +pub fn syscall6( |
| 69 | + number: SYS, |
| 70 | + arg1: u32, |
| 71 | + arg2: u32, |
| 72 | + arg3: u32, |
| 73 | + arg4: u32, |
| 74 | + arg5: u32, |
| 75 | + arg6: u32, |
| 76 | +) u32 { |
| 77 | + return asm volatile ( |
| 78 | + \\ l.sys 1 |
| 79 | + : [ret] "={r11}" (-> u32), |
| 80 | + : [number] "{r11}" (@intFromEnum(number)), |
| 81 | + [arg1] "{r3}" (arg1), |
| 82 | + [arg2] "{r4}" (arg2), |
| 83 | + [arg3] "{r5}" (arg3), |
| 84 | + [arg4] "{r6}" (arg4), |
| 85 | + [arg5] "{r7}" (arg5), |
| 86 | + [arg6] "{r8}" (arg6), |
| 87 | + : .{ .r12 = true, .r13 = true, .r15 = true, .r17 = true, .r19 = true, .r21 = true, .r23 = true, .r25 = true, .r27 = true, .r29 = true, .r31 = true, .memory = true }); |
| 88 | +} |
| 89 | + |
| 90 | +pub fn clone() callconv(.naked) u32 { |
| 91 | + // __clone(func, stack, flags, arg, ptid, tls, ctid) |
| 92 | + // r3, r4, r5, r6, r7, r8, +0 |
| 93 | + // |
| 94 | + // syscall(SYS_clone, flags, stack, ptid, tls, ctid) |
| 95 | + // r11 r3, r4, r5, r6, r7 |
| 96 | + asm volatile ( |
| 97 | + \\ # Save function pointer and argument pointer on new thread stack |
| 98 | + \\ l.andi r4, r4, -4 |
| 99 | + \\ l.addi r4, r4, -8 |
| 100 | + \\ l.sw 0(r4), r3 |
| 101 | + \\ l.sw 4(r4), r6 |
| 102 | + \\ |
| 103 | + \\ # Shuffle (fn,sp,fl,arg,ptid,tls,ctid) to (fl,sp,ptid,tls,ctid) |
| 104 | + \\ l.ori r11, r0, 220 # SYS_clone |
| 105 | + \\ l.ori r3, r5, 0 |
| 106 | + \\ l.ori r5, r7, 0 |
| 107 | + \\ l.ori r6, r8, 0 |
| 108 | + \\ l.lwz r7, 0(r1) |
| 109 | + \\ l.sys 1 |
| 110 | + \\ l.sfeqi r11, 0 |
| 111 | + \\ l.bf 1f |
| 112 | + \\ l.jr r9 |
| 113 | + \\1: |
| 114 | + ); |
| 115 | + if (builtin.unwind_tables != .none or !builtin.strip_debug_info) asm volatile ( |
| 116 | + \\ .cfi_undefined r9 |
| 117 | + ); |
| 118 | + asm volatile ( |
| 119 | + \\ l.ori r2, r0, 0 |
| 120 | + \\ l.ori r9, r0, 0 |
| 121 | + \\ |
| 122 | + \\ l.lwz r11, 0(r1) |
| 123 | + \\ l.lwz r3, 4(r1) |
| 124 | + \\ l.jalr r11 |
| 125 | + \\ |
| 126 | + \\ l.ori r3, r11, 0 |
| 127 | + \\ l.ori r11, r0, 93 # SYS_exit |
| 128 | + \\ l.sys 1 |
| 129 | + ); |
| 130 | +} |
| 131 | + |
| 132 | +pub const VDSO = void; |
| 133 | + |
| 134 | +pub const blksize_t = u32; |
| 135 | +pub const nlink_t = u32; |
| 136 | +pub const time_t = i32; |
| 137 | +pub const mode_t = u32; |
| 138 | +pub const off_t = i64; |
| 139 | +pub const ino_t = u64; |
| 140 | +pub const dev_t = u64; |
| 141 | +pub const blkcnt_t = i64; |
| 142 | + |
| 143 | +// The `stat64` definition used by the Linux kernel. |
| 144 | +pub const Stat = extern struct { |
| 145 | + dev: dev_t, |
| 146 | + ino: ino_t, |
| 147 | + mode: mode_t, |
| 148 | + nlink: nlink_t, |
| 149 | + uid: std.os.linux.uid_t, |
| 150 | + gid: std.os.linux.gid_t, |
| 151 | + rdev: dev_t, |
| 152 | + _pad0: [2]u32, |
| 153 | + size: off_t, |
| 154 | + blksize: blksize_t, |
| 155 | + _pad1: u32, |
| 156 | + blocks: blkcnt_t, |
| 157 | + atim: std.os.linux.timespec, |
| 158 | + mtim: std.os.linux.timespec, |
| 159 | + ctim: std.os.linux.timespec, |
| 160 | + _pad2: [2]u32, |
| 161 | + |
| 162 | + pub fn atime(self: @This()) std.os.linux.timespec { |
| 163 | + return self.atim; |
| 164 | + } |
| 165 | + |
| 166 | + pub fn mtime(self: @This()) std.os.linux.timespec { |
| 167 | + return self.mtim; |
| 168 | + } |
| 169 | + |
| 170 | + pub fn ctime(self: @This()) std.os.linux.timespec { |
| 171 | + return self.ctim; |
| 172 | + } |
| 173 | +}; |
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