From 336ef95c3faa74ffc01eb09d95a99085935c302f Mon Sep 17 00:00:00 2001
From: Pratchaya Khansomboon <pratchak@axis.com>
Date: Mon, 31 Mar 2025 18:05:17 +0200
Subject: [PATCH] Initial commit

---
 .editorconfig | 27 +++++++++++++++++++++++++++
 .gitignore    | 26 ++++++++++++++++++++++++++
 README.md     | 23 +++++++++++++++++++++++
 haxcc.c       | 11 +++++++++++
 haxcc.h       | 18 ++++++++++++++++++
 haxcc.ld      |  9 +++++++++
 hello.cpp     | 24 ++++++++++++++++++++++++
 meson.build   | 23 +++++++++++++++++++++++
 mods/mod_a.c  | 18 ++++++++++++++++++
 mods/mod_b.c  | 18 ++++++++++++++++++
 10 files changed, 197 insertions(+)
 create mode 100644 .editorconfig
 create mode 100644 .gitignore
 create mode 100644 README.md
 create mode 100644 haxcc.c
 create mode 100644 haxcc.h
 create mode 100644 haxcc.ld
 create mode 100644 hello.cpp
 create mode 100644 meson.build
 create mode 100644 mods/mod_a.c
 create mode 100644 mods/mod_b.c

diff --git a/.editorconfig b/.editorconfig
new file mode 100644
index 0000000..02fbb92
--- /dev/null
+++ b/.editorconfig
@@ -0,0 +1,27 @@
+[*]
+end_of_line  = LF
+charset      = utf-8
+indent_style = space
+indent_size  = 4
+insert_final_newline     = true
+trim_trailing_whitespace = true
+
+[*.{ts,js,tsx,jsx,lua,sh}]
+charset      = utf-8
+indent_style = space
+indent_size  = 2
+
+[*.{go,bb}]
+indent_style = tab
+
+[Makefile]
+indent_style = tab
+
+[*.{yml,json}]
+indent_style = space
+indent_size  = 2
+
+[meson.{build,options}]
+indent_style = space
+indent_size  = 2
+
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..638da72
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,26 @@
+# CMake/Meson
+build*
+cmake-build-*
+
+# IntelliJ
+.idea
+
+# LSPs
+.ccls
+.ccls-cache
+.cache
+compile_commands.json
+
+# JetBrains Fleet
+.fleet
+
+# macOS
+.DS_Store
+.AppleDouble
+.LSOverride
+
+# Visual Studio Code
+.vscode
+
+# ImGui
+imgui.ini
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..76a94eb
--- /dev/null
+++ b/README.md
@@ -0,0 +1,23 @@
+# Hello Linker Script!
+
+Trying out linker script.
+
+## Requirement
+
+  - [meson](https://mesonbuild.com/)
+
+## Development
+
+```sh
+meson setup build
+```
+
+```sh
+ninja -C build
+```
+
+## Resources
+
+  - [Mastering the GNU linker script](https://allthingsembedded.com/post/2020-04-11-mastering-the-gnu-linker-script/)
+  - [Linker Scripts](https://home.cs.colorado.edu/~main/cs1300/doc/gnu/ld_3.html)
+
diff --git a/haxcc.c b/haxcc.c
new file mode 100644
index 0000000..430b52e
--- /dev/null
+++ b/haxcc.c
@@ -0,0 +1,11 @@
+#include "haxcc.h"
+
+extern mod haxmods_begin[];
+extern mod haxmods_end[];
+
+mod* mod_begin(void) {
+    return haxmods_begin;
+}
+mod* mod_end(void) {
+    return haxmods_end;
+}
diff --git a/haxcc.h b/haxcc.h
new file mode 100644
index 0000000..c83f326
--- /dev/null
+++ b/haxcc.h
@@ -0,0 +1,18 @@
+#ifndef HAXCC_H
+#define HAXCC_H
+
+#define HAX_MOD(name) \
+    static const struct mod name __attribute__((used, section("__haxmod")))
+
+typedef int (*init_fn)(void);
+typedef int (*done_fn)(void);
+
+typedef struct mod {
+    init_fn init;
+    done_fn done;
+} mod;
+
+mod* mod_begin(void);
+mod* mod_end(void);
+
+#endif  // HAXCC_H
diff --git a/haxcc.ld b/haxcc.ld
new file mode 100644
index 0000000..0c9c443
--- /dev/null
+++ b/haxcc.ld
@@ -0,0 +1,9 @@
+SECTIONS
+{
+    haxmods (READONLY) : ALIGN(4) {
+        PROVIDE(haxmods_begin = .);
+        KEEP(*(__haxmod))
+        PROVIDE(haxmods_end = .);
+    }
+}
+INSERT AFTER .text
diff --git a/hello.cpp b/hello.cpp
new file mode 100644
index 0000000..b23bb70
--- /dev/null
+++ b/hello.cpp
@@ -0,0 +1,24 @@
+#include <cstdio>
+
+extern "C" {
+#include "haxcc.h"
+}
+
+auto main() -> int {
+    std::printf("Hello, World!\n");
+    std::printf("begin: %p, end: %p, len: %lu\n", (void*)mod_begin(), (void*)mod_end(), ((long)mod_end() - (long)mod_begin()) / sizeof(mod));
+    std::printf("\n");
+
+    for (auto* it = mod_begin(); it != mod_end(); ++it) {
+        it->init();
+    }
+
+    std::printf("\n");
+    std::printf("we're have init everything\n");
+    std::printf("\n");
+
+    for (auto* it = mod_begin(); it != mod_end(); ++it) {
+        it->done();
+    }
+    return 0;
+}
diff --git a/meson.build b/meson.build
new file mode 100644
index 0000000..5ed82ed
--- /dev/null
+++ b/meson.build
@@ -0,0 +1,23 @@
+project(
+  'haxcc',
+  ['c', 'cpp'],
+  version : '0.1',
+  default_options : [
+    'warning_level=3',
+    'c_std=c2x',
+    'cpp_std=c++23'
+  ])
+
+ldscript = 'haxcc.ld'
+
+executable(
+  'haxcc',
+  [
+    'hello.cpp',
+    'haxcc.c',
+    'mods/mod_a.c',
+    'mods/mod_b.c',
+  ],
+  link_args: ['-Wl,-T',  meson.source_root() / ldscript, '-no-pie' ],
+  install : false
+)
diff --git a/mods/mod_a.c b/mods/mod_a.c
new file mode 100644
index 0000000..4d7de65
--- /dev/null
+++ b/mods/mod_a.c
@@ -0,0 +1,18 @@
+#include "haxcc.h"
+
+#include <stdio.h>
+
+int mod_a_init(void) {
+    printf("module a init\n");
+    return 0;
+}
+
+int mod_a_done(void) {
+    printf("module a done\n");
+    return 0;
+}
+
+HAX_MOD(mod_a) = {
+    .init = mod_a_init,
+    .done = mod_a_done
+};
diff --git a/mods/mod_b.c b/mods/mod_b.c
new file mode 100644
index 0000000..16b3493
--- /dev/null
+++ b/mods/mod_b.c
@@ -0,0 +1,18 @@
+#include "haxcc.h"
+
+#include <stdio.h>
+
+static int mod_b_init(void) {
+    printf("top kek MODB!\n");
+    return 0;
+}
+
+static int mod_b_done(void) {
+    printf("MODB do be done!\n");
+    return 0;
+}
+
+HAX_MOD(mod_b) = {
+    .init = mod_b_init,
+    .done = mod_b_done
+};