feat: add linker script

CMakeLists.txt

@@ -1,7 +1,7 @@
 cmake_minimum_required(VERSION 3.29)
 project(init C)
 
-add_library(init
+add_executable(init
     src/banner.c
     src/cmd.c
     src/cmds/banner.c
@@ -14,7 +14,6 @@ add_library(init
     src/cmds/shutdown.c
     src/cmds/sleep.c
     src/init.c
-    src/main.c
     src/shell.c
 )
 
@@ -24,6 +23,7 @@ target_compile_options(init PRIVATE
     -mcmodel=medany
     -Wall
 )
+target_link_options(init PRIVATE -nostdlib -T ${PROJECT_SOURCE_DIR}/linker.ld)
 target_include_directories(init PRIVATE
     ${LIBC_INCLUDE}
     ${LUA_INCLUDE}

linker.ld

@@ -0,0 +1,37 @@
+#include <config.h>
+
+ENTRY(_start)
+SECTIONS {
+    . = 0x84000000;
+
+    .text : {
+        *(.text .text.*)
+    }
+
+    . = ALIGN(4K);
+    .rodata : {
+        *(.rodata .rodata.*)
+    }
+
+    . = ALIGN(4K);
+    .data : {
+        *(.data .data.*)
+    }
+
+    .sdata : {
+        *(.sdata .sdata.*)
+    }
+
+    . = ALIGN(8);
+    PROVIDE(__bss_start = .);
+
+    .sbss : {
+        *(.sbss .sbss.*)
+    }
+
+    .bss : {
+        *(.bss .bss.*)
+    }
+
+    PROVIDE(_end = .);
+}

src/init.c

@@ -2,18 +2,17 @@
 #include <errno.h>
 #include <proc.h>
 #include <reboot.h>
+#include <shell.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <sys/wait.h>
 
-void start();
-
-void init(void) {
+int main(void) {
     printf("Booting up CargOS v%d.%d.%d...\n", VERSION_MAJOR, VERSION_MINOR,
            VERSION_PATCH);
 
     const char *argv[] = {"shell", nullptr};
-    proc(start, argv);
+    proc(shell, argv);
 
     while (true) {
         if (wait(nullptr) < 0 && errno == ECHILD) {