Merge pull request #25623 from alexrp/or1k

Add `or1k-linux` support (via CBE)

1 files changed, 173 insertions, 0 deletions

diff --git a/lib/std/os/linux/or1k.zig b/lib/std/os/linux/or1k.zig
new file mode 100644
index 0000000000..1054e52d19
--- /dev/null
+++ b/lib/std/os/linux/or1k.zig
@@ -0,0 +1,173 @@
+const builtin = @import("builtin");
+const std = @import("../../std.zig");
+const SYS = std.os.linux.SYS;
+
+pub fn syscall0(number: SYS) u32 {
+    return asm volatile (
+        \\ l.sys 1
+        : [ret] "={r11}" (-> u32),
+        : [number] "{r11}" (@intFromEnum(number)),
+        : .{ .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 });
+}
+
+pub fn syscall1(number: SYS, arg1: u32) u32 {
+    return asm volatile (
+        \\ l.sys 1
+        : [ret] "={r11}" (-> u32),
+        : [number] "{r11}" (@intFromEnum(number)),
+          [arg1] "{r3}" (arg1),
+        : .{ .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 });
+}
+
+pub fn syscall2(number: SYS, arg1: u32, arg2: u32) u32 {
+    return asm volatile (
+        \\ l.sys 1
+        : [ret] "={r11}" (-> u32),
+        : [number] "{r11}" (@intFromEnum(number)),
+          [arg1] "{r3}" (arg1),
+          [arg2] "{r4}" (arg2),
+        : .{ .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 });
+}
+
+pub fn syscall3(number: SYS, arg1: u32, arg2: u32, arg3: u32) u32 {
+    return asm volatile (
+        \\ l.sys 1
+        : [ret] "={r11}" (-> u32),
+        : [number] "{r11}" (@intFromEnum(number)),
+          [arg1] "{r3}" (arg1),
+          [arg2] "{r4}" (arg2),
+          [arg3] "{r5}" (arg3),
+        : .{ .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 });
+}
+
+pub fn syscall4(number: SYS, arg1: u32, arg2: u32, arg3: u32, arg4: u32) u32 {
+    return asm volatile (
+        \\ l.sys 1
+        : [ret] "={r11}" (-> u32),
+        : [number] "{r11}" (@intFromEnum(number)),
+          [arg1] "{r3}" (arg1),
+          [arg2] "{r4}" (arg2),
+          [arg3] "{r5}" (arg3),
+          [arg4] "{r6}" (arg4),
+        : .{ .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 });
+}
+
+pub fn syscall5(number: SYS, arg1: u32, arg2: u32, arg3: u32, arg4: u32, arg5: u32) u32 {
+    return asm volatile (
+        \\ l.sys 1
+        : [ret] "={r11}" (-> u32),
+        : [number] "{r11}" (@intFromEnum(number)),
+          [arg1] "{r3}" (arg1),
+          [arg2] "{r4}" (arg2),
+          [arg3] "{r5}" (arg3),
+          [arg4] "{r6}" (arg4),
+          [arg5] "{r7}" (arg5),
+        : .{ .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 });
+}
+
+pub fn syscall6(
+    number: SYS,
+    arg1: u32,
+    arg2: u32,
+    arg3: u32,
+    arg4: u32,
+    arg5: u32,
+    arg6: u32,
+) u32 {
+    return asm volatile (
+        \\ l.sys 1
+        : [ret] "={r11}" (-> u32),
+        : [number] "{r11}" (@intFromEnum(number)),
+          [arg1] "{r3}" (arg1),
+          [arg2] "{r4}" (arg2),
+          [arg3] "{r5}" (arg3),
+          [arg4] "{r6}" (arg4),
+          [arg5] "{r7}" (arg5),
+          [arg6] "{r8}" (arg6),
+        : .{ .r12 = true, .r13 = true, .r15 = true, .r17 = true, .r19 = true, .r21 = true, .r23 = true, .r25 = true, .r27 = true, .r29 = true, .r31 = true, .memory = true });
+}
+
+pub fn clone() callconv(.naked) u32 {
+    // __clone(func, stack, flags, arg, ptid, tls, ctid)
+    //         r3,   r4,    r5,    r6,  r7,   r8,  +0
+    //
+    // syscall(SYS_clone, flags, stack, ptid, tls, ctid)
+    //         r11        r3,    r4,    r5,   r6,  r7
+    asm volatile (
+        \\ # Save function pointer and argument pointer on new thread stack
+        \\ l.andi r4, r4, -4
+        \\ l.addi r4, r4, -8
+        \\ l.sw 0(r4), r3
+        \\ l.sw 4(r4), r6
+        \\
+        \\ # Shuffle (fn,sp,fl,arg,ptid,tls,ctid) to (fl,sp,ptid,tls,ctid)
+        \\ l.ori r11, r0, 220 # SYS_clone
+        \\ l.ori r3, r5, 0
+        \\ l.ori r5, r7, 0
+        \\ l.ori r6, r8, 0
+        \\ l.lwz r7, 0(r1)
+        \\ l.sys 1
+        \\ l.sfeqi r11, 0
+        \\ l.bf 1f
+        \\ l.jr r9
+        \\1:
+    );
+    if (builtin.unwind_tables != .none or !builtin.strip_debug_info) asm volatile (
+        \\ .cfi_undefined r9
+    );
+    asm volatile (
+        \\ l.ori r2, r0, 0
+        \\ l.ori r9, r0, 0
+        \\
+        \\ l.lwz r11, 0(r1)
+        \\ l.lwz r3, 4(r1)
+        \\ l.jalr r11
+        \\
+        \\ l.ori r3, r11, 0
+        \\ l.ori r11, r0, 93 # SYS_exit
+        \\ l.sys 1
+    );
+}
+
+pub const VDSO = void;
+
+pub const blksize_t = u32;
+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 `stat64` 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,
+    _pad0: [2]u32,
+    size: off_t,
+    blksize: blksize_t,
+    _pad1: u32,
+    blocks: blkcnt_t,
+    atim: std.os.linux.timespec,
+    mtim: std.os.linux.timespec,
+    ctim: std.os.linux.timespec,
+    _pad2: [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;
+    }
+};