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mem_free

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git-svn-id: svn://kolibrios.org@886 a494cfbc-eb01-0410-851d-a64ba20cac60
This commit is contained in:
Sergey Semyonov (Serge) 2008-10-27 20:47:58 +00:00
parent 5a66f7d299
commit bc6cebbf4b
11 changed files with 1556 additions and 1379 deletions
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18
kernel/branches/kolibri_pe/core/dll.inc
View File

@ -50,7 +50,7 @@ endp
uglobal
irq_rights rd 16
irq_rights rd 16
endg
@ -64,10 +64,9 @@ proc get_int_handler stdcall, irq:dword
mov eax, [irq_tab + 4 * eax]
ret
.err:
.err:
xor eax, eax
ret
endp
align 4
@ -179,6 +178,7 @@ align 16
cmp dword [esp + 32], 8
mov al, 0x20
jb @f
out 0xa0, al
@@:
out 0x20, al
@ -195,6 +195,7 @@ proc get_notify stdcall, p_ev:dword
mov ebx,[current_slot]
test dword [ebx+APPDATA.event_mask],EVENT_NOTIFY
jz @f
and dword [ebx+APPDATA.event_mask], not EVENT_NOTIFY
mov edi, [p_ev]
mov dword [edi], EV_INTR
@ -465,6 +466,7 @@ proc get_coff_sym stdcall, pSym:dword,count:dword, sz_sym:dword
add [pSym], 18
dec [count]
jnz @b
xor eax, eax
ret
.ok:
@ -474,11 +476,10 @@ proc get_coff_sym stdcall, pSym:dword,count:dword, sz_sym:dword
endp
align 4
proc get_curr_task
get_curr_task:
mov eax,[CURRENT_TASK]
shl eax, 8
ret
endp
align 4
proc get_fileinfo stdcall, file_name:dword, info:dword
@ -612,7 +613,10 @@ proc load_file stdcall, file_name:dword
mov [file2], eax
stdcall unpack, [file], eax
stdcall kernel_free, [file]
mov ecx, [file]
call @mem_free@4
mov eax, [file2]
mov ebx, [file_size]
.exit:
@ -844,6 +848,7 @@ proc load_driver stdcall, driver_name:dword
call @mem_alloc@8
test eax, eax
jz .fail
mov [img_base], eax
mov edi, eax
@ -1015,7 +1020,6 @@ proc load_library stdcall, file_name:dword
jmp .next
.copy:
add esi, edx
; add edi, new_app_base
mov ecx, [eax+CFS.SizeOfRawData]
cld
rep movsb

2
kernel/branches/kolibri_pe/core/exports.inc
View File

@ -112,7 +112,7 @@ kernel_export:
dd szReleasePages , release_pages
dd szFreeKernelSpace , free_kernel_space ;stdcall
dd szHeapAlloc , @heap_alloc@8 ;fastcall
dd szHeapAlloc , @mem_alloc@8 ;fastcall
dd szKernelFree , kernel_free ;stdcall
dd szUserAlloc , user_alloc ;stdcall
dd szUserFree , user_free ;stdcall

284
kernel/branches/kolibri_pe/core/heap.c
View File

@ -13,33 +13,42 @@ typedef struct
addr_t base;
size_t size;
void* parent;
u32_t reserved;
u32_t state;
}md_t;
#define MD_FREE 1
#define MD_USED 2
typedef struct {
SPINLOCK_DECLARE(lock); /**< this lock protects everything below */
u32_t availmask;
link_t list[32];
link_t free[32];
link_t used;
}heap_t;
slab_cache_t *md_slab;
slab_cache_t *phm_slab;
heap_t lheap;
heap_t sheap;
static inline void _set_lmask(count_t idx)
{ asm volatile ("bts DWORD PTR [_lheap], %0"::"r"(idx):"cc"); }
{ asm volatile ("bts %0, _lheap"::"r"(idx):"cc"); }
static inline void _reset_lmask(count_t idx)
{ asm volatile ("btr DWORD PTR [_lheap], %0"::"r"(idx):"cc"); }
{ asm volatile ("btr %0, _lheap"::"r"(idx):"cc"); }
static inline void _set_smask(count_t idx)
{ asm volatile ("bts DWORD PTR [_sheap], %0"::"r"(idx):"cc"); }
{ asm volatile ("bts %0, _sheap"::"r"(idx):"cc"); }
static inline void _reset_smask(count_t idx)
{ asm volatile ("btr DWORD PTR [_sheap], %0"::"r"(idx):"cc"); }
{ asm volatile ("btr %0, _sheap"::"r"(idx):"cc"); }
int __fastcall init_heap(addr_t base, size_t size)
@ -54,10 +63,14 @@ int __fastcall init_heap(addr_t base, size_t size)
for (i = 0; i < 32; i++)
{
list_initialize(&lheap.list[i]);
list_initialize(&sheap.list[i]);
list_initialize(&lheap.free[i]);
list_initialize(&sheap.free[i]);
};
list_initialize(&lheap.used);
list_initialize(&sheap.used);
md_slab = slab_cache_create(sizeof(md_t), 32,NULL,NULL,SLAB_CACHE_MAGDEFERRED);
md = (md_t*)slab_alloc(md_slab,0);
@ -66,9 +79,9 @@ int __fastcall init_heap(addr_t base, size_t size)
md->base = base;
md->size = size;
md->parent = NULL;
md->reserved = 0;
md->state = MD_FREE;
list_prepend(&md->link, &lheap.list[31]);
list_prepend(&md->link, &lheap.free[31]);
lheap.availmask = 0x80000000;
sheap.availmask = 0x00000000;
@ -93,8 +106,8 @@ md_t* __fastcall find_large_md(size_t size)
{
if(idx0 == 31)
{
md_t *tmp = (md_t*)lheap.list[31].next;
while((link_t*)tmp != &lheap.list[31])
md_t *tmp = (md_t*)lheap.free[31].next;
while((link_t*)tmp != &lheap.free[31])
{
if(tmp->size >= size)
{
@ -110,39 +123,44 @@ md_t* __fastcall find_large_md(size_t size)
{
idx0 = _bsf(mask);
ASSERT( !list_empty(&lheap.list[idx0]))
ASSERT( !list_empty(&lheap.free[idx0]))
md = (md_t*)lheap.list[idx0].next;
md = (md_t*)lheap.free[idx0].next;
};
}
else
return NULL;
ASSERT(md->state == MD_FREE);
list_remove((link_t*)md);
if(list_empty(&lheap.list[idx0]))
if(list_empty(&lheap.free[idx0]))
_reset_lmask(idx0);
if(md->size > size)
{
count_t idx1;
md_t *new_md = (md_t*)slab_alloc(md_slab,0);
md_t *new_md = (md_t*)slab_alloc(md_slab,0); /* FIXME check */
link_initialize(&new_md->link);
list_insert(&new_md->adj, &md->adj);
new_md->base = md->base;
new_md->size = size;
new_md->state = MD_USED;
md->base+= size;
md->size-= size;
idx1 = (md->size>>22) - 1 < 32 ? (md->size>>22) - 1 : 31;
list_prepend(&md->link, &lheap.list[idx1]);
list_prepend(&md->link, &lheap.free[idx1]);
_set_lmask(idx1);
return new_md;
}
};
md->state = MD_USED;
return md;
}
@ -168,8 +186,10 @@ md_t* __fastcall find_small_md(size_t size)
{
if(idx0 == 31)
{
md_t *tmp = (md_t*)sheap.list[31].next;
while((link_t*)tmp != &sheap.list[31])
ASSERT( !list_empty(&sheap.free[31]));
md_t *tmp = (md_t*)sheap.free[31].next;
while((link_t*)tmp != &sheap.free[31])
{
if(tmp->size >= size)
{
@ -182,8 +202,10 @@ md_t* __fastcall find_small_md(size_t size)
else
{
idx0 = _bsf(mask);
ASSERT( !list_empty(&sheap.list[idx0]))
md = (md_t*)sheap.list[idx0].next;
ASSERT( !list_empty(&sheap.free[idx0]));
md = (md_t*)sheap.free[idx0].next;
}
};
@ -191,8 +213,10 @@ md_t* __fastcall find_small_md(size_t size)
{
DBG("remove md %x\n", md);
ASSERT(md->state==MD_FREE);
list_remove((link_t*)md);
if(list_empty(&sheap.list[idx0]))
if(list_empty(&sheap.free[idx0]))
_reset_smask(idx0);
}
else
@ -208,19 +232,20 @@ md_t* __fastcall find_small_md(size_t size)
return NULL;
};
md = (md_t*)slab_alloc(md_slab,0);
md = (md_t*)slab_alloc(md_slab,0); /* FIXME check */
link_initialize(&md->link);
list_initialize(&md->adj);
md->base = lmd->base;
md->size = lmd->size;
md->parent = lmd;
md->reserved = 0;
md->state = MD_USED;
};
if(md->size > size)
{
count_t idx1;
md_t *new_md = (md_t*)slab_alloc(md_slab,0);
md_t *new_md = (md_t*)slab_alloc(md_slab,0); /* FIXME check */
link_initialize(&new_md->link);
list_insert(&new_md->adj, &md->adj);
@ -228,26 +253,27 @@ md_t* __fastcall find_small_md(size_t size)
new_md->base = md->base;
new_md->size = size;
new_md->parent = md->parent;
new_md->reserved = 0;
new_md->state = MD_USED;
md->base+= size;
md->size-= size;
md->state = MD_FREE;
idx1 = (md->size>>12) - 1 < 32 ? (md->size>>12) - 1 : 31;
DBG("insert md %x, base %x size %x idx %x\n", md,md->base, md->size,idx1);
if( idx1 < 31)
list_prepend(&md->link, &sheap.list[idx1]);
list_prepend(&md->link, &sheap.free[idx1]);
else
{
if( list_empty(&sheap.list[31]))
list_prepend(&md->link, &sheap.list[31]);
if( list_empty(&sheap.free[31]))
list_prepend(&md->link, &sheap.free[31]);
else
{
md_t *tmp = (md_t*)sheap.list[31].next;
md_t *tmp = (md_t*)sheap.free[31].next;
while((link_t*)tmp != &sheap.list[31])
while((link_t*)tmp != &sheap.free[31])
{
if(md->base < tmp->base)
break;
@ -262,11 +288,93 @@ md_t* __fastcall find_small_md(size_t size)
safe_sti(efl);
return new_md;
}
};
md->state = MD_USED;
safe_sti(efl);
return md;
}
void __fastcall free_small_md(md_t *md)
{
eflags_t efl ;
md_t *fd;
md_t *bk;
count_t idx;
efl = safe_cli();
spinlock_lock(&sheap.lock);
if( !list_empty(&md->adj))
{
bk = (md_t*)md->adj.prev;
fd = (md_t*)md->adj.next;
if(fd->state == MD_FREE)
{
idx = (fd->size>>12) - 1 < 32 ? (fd->size>>12) - 1 : 31;
list_remove((link_t*)fd);
if(list_empty(&sheap.free[idx]))
_reset_smask(idx);
md->size+= fd->size;
md->adj.next = fd->adj.next;
md->adj.next->prev = (link_t*)md;
slab_free(md_slab, fd);
};
if(bk->state == MD_FREE)
{
idx = (bk->size>>12) - 1 < 32 ? (bk->size>>12) - 1 : 31;
list_remove((link_t*)bk);
if(list_empty(&sheap.free[idx]))
_reset_smask(idx);
bk->size+= md->size;
bk->adj.next = md->adj.next;
bk->adj.next->prev = (link_t*)bk;
slab_free(md_slab, md);
md = fd;
};
};
md->state = MD_FREE;
idx = (md->size>>12) - 1 < 32 ? (md->size>>12) - 1 : 31;
_set_smask(idx);
if( idx < 31)
list_prepend(&md->link, &sheap.free[idx]);
else
{
if( list_empty(&sheap.free[31]))
list_prepend(&md->link, &sheap.free[31]);
else
{
md_t *tmp = (md_t*)sheap.free[31].next;
while((link_t*)tmp != &sheap.free[31])
{
if(md->base < tmp->base)
break;
tmp = (md_t*)tmp->link.next;
}
list_insert(&md->link, &tmp->link);
};
};
spinlock_unlock(&sheap.lock);
safe_sti(efl);
};
#define page_tabs 0xDF800000
/*
phismem_t* __fastcall phis_alloc(count_t count)
{
phismem_t *phm;
@ -289,8 +397,6 @@ phismem_t* __fastcall phis_alloc(count_t count)
return phm;
}
#define page_tabs 0xDF800000
void map_phm(addr_t base, phismem_t *phm, u32_t mapflags)
{
count_t count;
@ -317,27 +423,17 @@ void map_phm(addr_t base, phismem_t *phm, u32_t mapflags)
}
}
};
*/
void* __fastcall mem_alloc(size_t size, u32_t flags)
void * __fastcall mem_alloc(size_t size, u32_t flags)
{
eflags_t efl;
md_t *md;
phismem_t *phm;
size = (size+4095)&~4095;
DBG("\nmem_alloc: %x bytes\n", size);
md = find_small_md(size);
if( md )
{
phm = phis_alloc(size>>12);
map_phm(md->base , phm, flags);
return (void*)md->base;
}
return NULL;
};
void * __fastcall heap_alloc(size_t size, u32_t flags)
{
md_t *md;
ASSERT(size != 0);
size = (size+4095)&~4095;
@ -345,6 +441,8 @@ void * __fastcall heap_alloc(size_t size, u32_t flags)
if( md )
{
ASSERT(md->state == MD_USED);
if( flags & PG_MAP )
{
count_t tmp = size >> 12;
@ -356,10 +454,10 @@ void * __fastcall heap_alloc(size_t size, u32_t flags)
addr_t frame;
size_t size;
asm volatile ("bsr %0, %1":"=&r"(order):"r"(tmp):"cc");
asm volatile ("btr %0, %1" :"=r"(tmp):"r"(order):"cc");
asm volatile ("bsr %1, %0":"=&r"(order):"r"(tmp):"cc");
asm volatile ("btr %1, %0" :"=r"(tmp):"r"(order):"cc");
frame = core_alloc(order) | flags;
frame = core_alloc(order) | flags; /* FIXME check */
size = (1 << order);
while(size--)
@ -369,10 +467,86 @@ void * __fastcall heap_alloc(size_t size, u32_t flags)
};
};
};
DBG("alloc_heap: %x size %x\n\n",md->base, size);
efl = safe_cli();
spinlock_lock(&sheap.lock);
if( list_empty(&sheap.used) )
list_prepend(&md->link, &sheap.used);
else
{
md_t *tmp = (md_t*)sheap.used.next;
while((link_t*)tmp != &sheap.used)
{
if(md->base < tmp->base)
break;
tmp = (md_t*)tmp->link.next;
}
list_insert(&md->link, &tmp->link);
};
spinlock_unlock(&sheap.lock);
safe_sti(efl);
DBG("allocate: %x size %x\n\n",md->base, size);
return (void*)md->base;
};
return NULL;
};
void __fastcall mem_free(void *mem)
{
eflags_t efl;
md_t *tmp;
md_t *md = NULL;
DBG("mem_free: %x\n",mem);
ASSERT( mem != 0 );
ASSERT( ((addr_t)mem & 0xFFF) == 0 );
ASSERT( ! list_empty(&sheap.used));
efl = safe_cli();
tmp = (md_t*)sheap.used.next;
while((link_t*)tmp != &sheap.used)
{
if( tmp->base == (addr_t)mem )
{
md = tmp;
break;
};
tmp = (md_t*)tmp->link.next;
}
if( md )
{
DBG("\tmd: %x base: %x size: %x\n",md, md->base, md->size);
ASSERT(md->state == MD_USED);
count_t tmp = md->size >> 12;
addr_t *pte = &((addr_t*)page_tabs)[md->base>>12];
while(tmp--)
{
*pte++ = 0;
asm volatile (
"invlpg (%0)"
:
:"r" (mem) );
mem+= 4096;
};
list_remove((link_t*)md);
free_small_md( md );
}
else
{
DBG("\tERROR: invalid base address: %x\n", mem);
};
safe_sti(efl);
};

8
kernel/branches/kolibri_pe/core/mm.c
View File

@ -16,7 +16,7 @@ zone_t z_core;
static inline u32_t save_edx(void)
{
u32_t val;
asm volatile ("mov %0, edx":"=r"(val));
asm volatile ("movl %%edx, %0":"=r"(val));
return val;
};
@ -524,9 +524,9 @@ static inline int to_order(count_t arg)
{
int n;
asm volatile (
"xor eax, eax \n\t"
"bsr eax, edx \n\t"
"inc eax"
"xorl %eax, %eax \n\t"
"bsr %edx, %eax \n\t"
"incl %eax"
:"=a" (n)
:"d"(arg)
);

14
kernel/branches/kolibri_pe/core/slab.c
View File

@ -20,8 +20,6 @@ static slab_t *slab_create();
static slab_cache_t * slab_cache_alloc();
void slab_free(slab_cache_t *cache, void *obj);
/**
* Allocate frames for slab space and initialize
@ -313,22 +311,22 @@ static count_t slab_obj_destroy(slab_cache_t *cache, void *obj,
/** Return object to cache, use slab if known */
static void _slab_free(slab_cache_t *cache, void *obj, slab_t *slab)
{
// ipl_t ipl;
eflags_t efl;
// ipl = interrupts_disable();
efl = safe_cli();
// if ((cache->flags & SLAB_CACHE_NOMAGAZINE) \
|| magazine_obj_put(cache, obj)) {
// || magazine_obj_put(cache, obj)) {
slab_obj_destroy(cache, obj, slab);
// }
// interrupts_restore(ipl);
// atomic_dec(&cache->allocated_objs);
safe_sti(efl);
atomic_dec(&cache->allocated_objs);
}
/** Return slab object to cache */
void slab_free(slab_cache_t *cache, void *obj)
void __fastcall slab_free(slab_cache_t *cache, void *obj)
{
_slab_free(cache, obj, NULL);
}

14
kernel/branches/kolibri_pe/core/taskman.inc
View File

@ -187,7 +187,6 @@ proc fs_execute
loop .copy_process_name_loop
.copy_process_name_done:
mov ebx, cr3
mov [save_cr3], ebx
@ -218,7 +217,7 @@ end if
; release only virtual space, not phisical memory
stdcall free_kernel_space, [file_base]
stdcall free_kernel_space, [file_base] ;
lea eax, [hdr_cmdline]
lea ebx, [cmdline]
lea ecx, [filename]
@ -415,7 +414,6 @@ proc create_app_space stdcall, app_size:dword,img_base:dword,img_size:dword
mov eax, edi
call set_cr3
mov edx, [app_tabs]
mov edi, master_tab
@@:
@ -504,8 +502,10 @@ proc destroy_page_table stdcall, pg_tab:dword
mov eax, [esi]
test eax, 1
jz .next
test eax, 1 shl 9
jnz .next ;skip shared pages
call free_page
.next:
add esi, 4
@ -530,9 +530,11 @@ proc destroy_app_space stdcall, pg_dir:dword
shl ecx,5
cmp byte [CURRENT_TASK+ecx+0xa],9 ;if process running?
jz @f ;skip empty slots
shl ecx,3
cmp [SLOT_BASE+ecx+0xB8],ebx ;compare page directory addresses
jnz @f
inc edx ;thread found
@@:
inc eax
@ -858,6 +860,7 @@ proc new_sys_threads
.wait_lock:
cmp [application_table_status],0
je .get_lock
call change_task
jmp .wait_lock
@ -930,6 +933,7 @@ wait_mutex:
.do_wait:
cmp dword [ebx],0
je .get_lock
call change_task
jmp .do_wait
.get_lock:
@ -937,6 +941,7 @@ wait_mutex:
xchg eax, [ebx]
test eax, eax
jnz .do_wait
pop ebx
pop eax
ret
@ -1101,13 +1106,12 @@ proc set_app_params stdcall,slot:dword, params:dword,\
; set if debuggee
test byte [flags], 1
jz .no_debug
inc ecx ; process state - suspended
mov eax,[CURRENT_TASK]
mov [SLOT_BASE+ebx*8+APPDATA.debugger_slot],eax
.no_debug:
mov [CURRENT_TASK+ebx+TASKDATA.state], cl
;mov esi,new_process_running
;call sys_msg_board_str ;output information about succefull startup
DEBUGF 1,"%s",new_process_running
ret
endp

30
kernel/branches/kolibri_pe/include/atomic.h
View File

@ -36,17 +36,17 @@ typedef struct atomic {
static inline void atomic_inc(atomic_t *val) {
#ifdef USE_SMP
asm volatile ("lock inc %0\n" : "+m" (val->count));
asm volatile ("lock incl %0\n" : "+m" (val->count));
#else
asm volatile ("inc %0\n" : "+m" (val->count));
asm volatile ("incl %0\n" : "+m" (val->count));
#endif /* USE_SMP */
}
static inline void atomic_dec(atomic_t *val) {
#ifdef USE_SMP
asm volatile ("lock dec %0\n" : "+m" (val->count));
asm volatile ("lock decl %0\n" : "+m" (val->count));
#else
asm volatile ("dec %0\n" : "+m" (val->count));
asm volatile ("decl %0\n" : "+m" (val->count));
#endif /* USE_SMP */
}
@ -98,22 +98,20 @@ static inline void atomic_lock_arch(atomic_t *val)
u32_t tmp;
// preemption_disable();
asm volatile (
"0:\n"
"pause\n\t" /* Pentium 4's HT love this instruction */
"mov %1, [%0]\n\t"
"test %1, %1\n\t"
"jnz 0b\n\t" /* lightweight looping on locked spinlock */
"pause\n" /* Pentium 4's HT love this instruction */
"mov %0, %1\n"
"testl %1, %1\n"
"jnz 0b\n" /* lightweight looping on locked spinlock */
"inc %1\n\t" /* now use the atomic operation */
"xchg [%0], %1\n\t"
"test %1, %1\n\t"
"jnz 0b\n\t"
: "+m" (val->count), "=r"(tmp)
"incl %1\n" /* now use the atomic operation */
"xchgl %0, %1\n"
"testl %1, %1\n"
"jnz 0b\n"
: "+m" (val->count), "=&r"(tmp)
);
/*
* Prevent critical section code from bleeding out this way up.
*/
// CS_ENTER_BARRIER();
}

16
kernel/branches/kolibri_pe/include/core.h
View File

@ -37,8 +37,8 @@ static inline eflags_t safe_cli(void)
{
eflags_t tmp;
asm volatile (
"pushf\n\t"
"pop %0\n\t"
"pushfl\n\t"
"popl %0\n\t"
"cli\n"
: "=r" (tmp)
);
@ -48,8 +48,8 @@ static inline eflags_t safe_cli(void)
static inline void safe_sti(eflags_t efl)
{
asm volatile (
"push %0\n\t"
"popf\n"
"pushl %0\n\t"
"popfl\n"
: : "r" (efl)
);
}
@ -57,8 +57,8 @@ static inline void safe_sti(eflags_t efl)
static inline count_t fnzb(u32_t arg)
{
count_t n;
asm volatile ("xor %0, %0 \n\t"
"bsr %0, %1"
asm volatile ("xorl %0, %0 \n\t"
"bsr %1, %0"
:"=&r" (n)
:"r"(arg)
);
@ -68,8 +68,8 @@ static inline count_t fnzb(u32_t arg)
static inline count_t _bsf(u32_t arg)
{
count_t n;
asm volatile ("xor %0, %0 \n\t"
"bsf %0, %1"
asm volatile ("xorl %0, %0 \n\t"
"bsf %1, %0"
:"=&r" (n)
:"r"(arg)
);

2
kernel/branches/kolibri_pe/include/slab.h
View File

@ -78,3 +78,5 @@ slab_cache_t * slab_cache_create(
int flags);
void* __fastcall slab_alloc(slab_cache_t *cache, int flags);
void __fastcall slab_free(slab_cache_t *cache, void *obj);

7
kernel/branches/kolibri_pe/kernel.asm
View File

@ -147,9 +147,9 @@ extrn @init_heap@8
extrn @find_large_md@4
extrn @find_small_md@4
extrn @phis_alloc@4
extrn @mem_alloc@8
extrn @heap_alloc@8
extrn @mem_alloc@8
extrn @mem_free@4
extrn _slab_cache_init
extrn _alloc_page
@ -159,9 +159,6 @@ extrn _get_free_mem
extrn _bx_from_load
@mem_alloc@8 equ @heap_alloc@8
section '.flat' code readable align 4096
use32

2
kernel/branches/kolibri_pe/makefile
View File

@ -6,7 +6,7 @@ INCLUDE = include/
DEFS = -DUSE_SMP -DCONFIG_DEBUG
CFLAGS = -c -O2 -I $(INCLUDE) -fomit-frame-pointer -fno-builtin-printf -masm=intel
CFLAGS = -c -O2 -I $(INCLUDE) -fomit-frame-pointer -fno-builtin-printf
LDFLAGS = -shared -s -Map kernel.map --image-base 0x100000 --file-alignment 32
KERNEL_SRC:= \