Improve aarch64 support by building everything for both archictectures,

remove incorrect timer frequency set, fix interrupt handler not
restoring stack ptr, handle both user and kernel aborts, remove aarch64
ps2 support, fix ELF code mapped as code making it unwritable, add
assets.rs to handle both arches automatically, make PS2 x86_64
compatible with linux keycodes, always try printing kernel panic to
serial

kernel/src/driver/elf/loader.rs

@@ -59,7 +59,7 @@ pub fn load_file(mapper: &mut PageTable, elf_bytes: &[u8]) -> (*const u8, u64) {
         unsafe { core::ptr::read_unaligned(elf_bytes.as_ptr() as *const Elf64Ehdr) };
 
     if !validate_elf(&elf_header, elf_bytes.len()) {
-        return (null(), 0);
+        panic!("Invalid ELF");
     }
 
     let elf_header_ptr = elf_bytes.as_ptr() as *const Elf64Ehdr;
@@ -72,7 +72,7 @@ pub fn load_file(mapper: &mut PageTable, elf_bytes: &[u8]) -> (*const u8, u64) {
     };
 }
 
-pub fn run_elf(file_bytes: &[u8], should_swapgs: bool) {
+pub fn run_elf(file_bytes: &[u8], should_swapgs: bool, switch_to: bool) {
     let stack_base: u64 = 0x0000_7fff_0000_0000;
     let page_count = 4096; // 16 mib
     let page_size = 0x1000u64;
@@ -109,7 +109,9 @@ pub fn run_elf(file_bytes: &[u8], should_swapgs: bool) {
             process.address_space = Some(address_space)
         });
 
-        SCHEDULER.switch_to(process_pid, should_swapgs);
+        if switch_to {
+            SCHEDULER.switch_to(process_pid, should_swapgs);
+        }
     } else {
         return;
     };