Move platform-specific code for process loading/init for AMD64 to amd64/

kernel/proc/proc.h

@@ -2,6 +2,7 @@
 #define _KERNEL_PROC_PROC_H
 
 #include <aux/compiler.h>
+#include <aux/elf.h>
 #include <libk/std.h>
 #include <sync/spin_lock.h>
 #include <sys/mm.h>
@@ -51,6 +52,9 @@ struct procw {
 
 void proc_sched (void);
 void proc_kill (struct proc* proc);
+void proc_map (struct proc* proc, uintptr_t start_paddr, uintptr_t start_vaddr, size_t pages,
+               uint32_t flags);
+struct elf_aux proc_load_segments (struct proc* proc, uint8_t* elf);
 void proc_init (void);
 
 #endif // _KERNEL_PROC_PROC_H