hello_world: Use srvre_sys library

3 files changed, 17 insertions, 50 deletions

diff --git a/examples/hello_world/build.zig b/examples/hello_world/build.zig
index 61c46d2..63c8626 100644
--- a/examples/hello_world/build.zig
+++ b/examples/hello_world/build.zig
@@ -26,6 +26,11 @@ pub fn build(b: *std.Build) void {
     // set a preferred release mode, allowing the user to decide how to optimize.
     const optimize = b.standardOptimizeOption(.{});
 
+    const srvre_sys = b.dependency("srvre_sys", .{
+        .target = target,
+        .optimize = optimize,
+    });
+
     const exe = b.addExecutable(.{
         .name = "hello_world",
         .root_source_file = b.path("src/main.zig"),
@@ -33,6 +38,8 @@ pub fn build(b: *std.Build) void {
         .optimize = optimize,
     });
 
+    exe.root_module.addImport("srvre_sys", srvre_sys.module("srvre_sys"));
+
     // This declares intent for the executable to be installed into the
     // standard location when the user invokes the "install" step (the default
     // step when running `zig build`).
diff --git a/examples/hello_world/build.zig.zon b/examples/hello_world/build.zig.zon
index 479f58d..2761d5d 100644
--- a/examples/hello_world/build.zig.zon
+++ b/examples/hello_world/build.zig.zon
@@ -1,4 +1,5 @@
 // SPDX-FileCopyrightText: Zig contributors
+// SPDX-FileCopyrightText: 2024 Himbeer <himbeer@disroot.org>
 //
 // SPDX-License-Identifier: MIT
 
@@ -19,42 +20,11 @@
     // Once all dependencies are fetched, `zig build` no longer requires
     // internet connectivity.
     .dependencies = .{
-        // See `zig fetch --save <url>` for a command-line interface for adding dependencies.
-        //.example = .{
-        //    // When updating this field to a new URL, be sure to delete the corresponding
-        //    // `hash`, otherwise you are communicating that you expect to find the old hash at
-        //    // the new URL.
-        //    .url = "https://example.com/foo.tar.gz",
-        //
-        //    // This is computed from the file contents of the directory of files that is
-        //    // obtained after fetching `url` and applying the inclusion rules given by
-        //    // `paths`.
-        //    //
-        //    // This field is the source of truth; packages do not come from a `url`; they
-        //    // come from a `hash`. `url` is just one of many possible mirrors for how to
-        //    // obtain a package matching this `hash`.
-        //    //
-        //    // Uses the [multihash](https://multiformats.io/multihash/) format.
-        //    .hash = "...",
-        //
-        //    // When this is provided, the package is found in a directory relative to the
-        //    // build root. In this case the package's hash is irrelevant and therefore not
-        //    // computed. This field and `url` are mutually exclusive.
-        //    .path = "foo",
-
-        //    // When this is set to `true`, a package is declared to be lazily
-        //    // fetched. This makes the dependency only get fetched if it is
-        //    // actually used.
-        //    .lazy = false,
-        //},
+        .srvre_sys = .{
+            .url = "https://codeberg.org/Himbeer/srvre_sys/archive/f469f25308cf4e3f6a7f6ccdd9a8f634e10452a2.tar.gz",
+            .hash = "1220ec0ff680d96104969de102f8a9dc85ea3c379297788659def198f04fb7cfd839",
+        },
     },
-
-    // Specifies the set of files and directories that are included in this package.
-    // Only files and directories listed here are included in the `hash` that
-    // is computed for this package.
-    // Paths are relative to the build root. Use the empty string (`""`) to refer to
-    // the build root itself.
-    // A directory listed here means that all files within, recursively, are included.
     .paths = .{
         // This makes *all* files, recursively, included in this package. It is generally
         // better to explicitly list the files and directories instead, to insure that
diff --git a/examples/hello_world/src/main.zig b/examples/hello_world/src/main.zig
index 6f1b546..d45eea1 100644
--- a/examples/hello_world/src/main.zig
+++ b/examples/hello_world/src/main.zig
@@ -2,22 +2,12 @@
 //
 // SPDX-License-Identifier: AGPL-3.0-or-later
 
-export fn _start() void {
-    main();
-}
+const srvre_sys = @import("srvre_sys");
+const os = srvre_sys.os;
+
+usingnamespace srvre_sys;
 
 pub fn main() void {
     const s = "Hello from U-mode init\r\n";
-    asm volatile (
-        \\ li a7, 100001
-        \\ ecall
-        :
-        : [s] "{a0}" (s.ptr),
-          [n] "{a1}" (s.len),
-    );
-
-    asm volatile (
-        \\ li a7, 100003
-        \\ ecall
-        ::: "a7");
+    _ = os.consoleWrite(s) catch unreachable;
 }