Fix bugs

Makefile

@@ -34,15 +34,16 @@ qemu: default
 	qemu-kvm -cpu host -hda hdd.img
 
 bochs: default
-	echo "c" > commands
-	bochs -qf bochsrc.txt -rc commands
-	rm commands
+	bochs -qf bochsrc.txt
 
 debug: default
 	echo "c" > commands
 	bochs -qf debug_bochsrc.txt -rc commands
 	rm commands
 
+gdb: default
+	bochs -qf gdb_bochsrc.txt
+
 force_look:
 	true
 

cpp.mk

@@ -3,7 +3,7 @@ AS=x86_64-elf-as
 OC=x86_64-elf-objcopy
 
 WARNING_FLAGS=-Wall -Wextra -pedantic -Wold-style-cast -Wshadow
-COMMON_CPP_FLAGS=-masm=intel -Iinclude/ -nostdlib -Os -std=c++11 -fno-stack-protector -fno-exceptions -funsigned-char -fno-rtti -ffreestanding -fomit-frame-pointer -mno-red-zone -mno-3dnow -mno-mmx -fno-asynchronous-unwind-tables
+COMMON_CPP_FLAGS=-masm=intel -Iinclude/ -nostdlib -g -Os -std=c++11 -fno-stack-protector -fno-exceptions -funsigned-char -fno-rtti -ffreestanding -fomit-frame-pointer -mno-red-zone -mno-3dnow -mno-mmx -fno-asynchronous-unwind-tables
 
 CPP_FLAGS_LOW=-march=i386 -m32 -fno-strict-aliasing -fno-pic -fno-toplevel-reorder -mno-sse -mno-sse2 -mno-sse3 -mno-sse4 -mno-sse4.1 -mno-sse4.2
 

gdb_bochsrc.txt

@@ -0,0 +1,5 @@
+display_library: sdl
+magic_break: enabled=1
+gdbstub: enabled=1, port=1234
+ata0-master: type=disk, path="hdd.img", mode=flat, cylinders=1000, heads=16, spt=63
+boot: disk

kernel/Makefile

@@ -52,7 +52,7 @@ src/stl/%.cpp.o:
 
 kernel.bin: $(LINK_O_FILES)
 	$(CC) $(KERNEL_LINK_FLAGS) $(CPP_FLAGS_64) -o kernel.bin.o $(LINK_O_FILES)
-	$(OC) -R .note -R .comment -S -O binary kernel.bin.o kernel.bin
+	$(OC) -R .note -R .comment -O binary --set-section-flags .bss=alloc,load,contents kernel.bin.o kernel.bin
 
 debug:
 	echo $(KERNEL_CPP_STL_FILES)

kernel/src/memory.cpp

@@ -10,7 +10,7 @@
 #include "paging.hpp"
 #include "e820.hpp"
 
-namespace {
+namespace debugging {
 
 //Used to compile with malloc operations in the console
 //can produce a lot of output
@@ -98,8 +98,8 @@ static_assert(MIN_SPLIT == aligned_size(MIN_SPLIT), "The size of minimum split m
 fake_head head;
 malloc_header_chunk* malloc_head = 0;
 
-const e820::mmapentry* current_mmap_entry = nullptr;
-uintptr_t current_mmap_entry_position;
+const e820::mmapentry* current_mmap_entry = 0;
+uintptr_t current_mmap_entry_position = 0;
 
 //All allocated memory is in [min_address, max_address[
 uintptr_t min_address; //Address of the first block being allocated
@@ -120,16 +120,10 @@ uint64_t* allocate_block(uint64_t blocks){
         }
     }
 
-    asm volatile("xchg bx, bx");
-
-
     if(!current_mmap_entry){
         return nullptr;
     }
 
-
-
-
     auto block = reinterpret_cast<uint64_t*>(current_mmap_entry_position);
 
     paging::identity_map(block, blocks);
@@ -212,28 +206,24 @@ void init_head(){
 }
 
 void expand_heap(malloc_header_chunk* current){
-    asm volatile("xchg bx, bx");
-
     //Allocate a new block of memory
     uint64_t* block = allocate_block(MIN_BLOCKS);
 
     //Transform it into a malloc chunk
     auto header = reinterpret_cast<malloc_header_chunk*>(block);
 
-    asm volatile("xchg bx, bx");
-
     //Update the sizes
     header->size() = MIN_BLOCKS * BLOCK_SIZE - META_SIZE;
     header->footer()->size() = header->size();
 
-    asm volatile("xchg bx, bx");
-
     //Insert the new block into the free list
     insert_after(current, header);
 }
 
 } //end of anonymous namespace
 
+using namespace debugging;
+
 void init_memory_manager(){
     //Init the fake head
     init_head();