Replace some uses of check() with expect()

kernel/src/arch/x86_64/CPU.cpp

@@ -80,7 +80,7 @@ static void set_base(GDTEntry* entry, u32 base)
 
 static void set_limit(GDTEntry* entry, u32 limit)
 {
-    check(limit <= 0xFFFFF);
+    expect(limit <= 0xFFFFF, "Limit too big for a GDT entry");
     entry->limit0 = limit & 0xFFFF;
     entry->limit1_flags = (entry->limit1_flags & 0xF0) | ((limit >> 16) & 0xF);
 }
@@ -208,7 +208,7 @@ struct IDTR
 static void idt_add_handler(short num, void* handler, u8 type_attr)
 {
     check(handler != nullptr);
-    check(num < 256);
+    expect(num < 256, "IDT can only hold up to 256 entries");
     IDTEntry* entry_for_handler = &idt[num];
     entry_for_handler->selector = 0x08;
     entry_for_handler->type_attr = type_attr;

kernel/src/memory/Heap.cpp

@@ -64,7 +64,7 @@ static bool is_block_free(HeapBlock* block)
 
 static usize space_available(HeapBlock* block)
 {
-    check(!is_block_free(block));
+    expect(!is_block_free(block), "Attempting to split a free block");
     return block->full_size - block->req_size;
 }