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k_mem.c
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k_mem.c
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#include "k_mem.h"
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <sys/stat.h>
#include <sys/mman.h>
#include <asm/ldt.h>
#include <fcntl.h>
int modify_ldt(int func, void* ptr, unsigned long bytecount);
#define HEAP_BLOCK_SIZE 0x100000
#define HTAG_NONE 0x00
#define HTAG_SZMASK 0x0F
#define HTAG_BIGSZ 0x0F
#define HTAG_NORMAL 0x10
#define HTAG_FREE 0x20
#define HTAG_PARAM 0x80
#define KERNEL_SHMEM "/kolibri.kmem"
#define KERNEL_MEM_BASE (void*)0x10000000
#define KERNEL_MEM_SIZE ((sizeof(KERNEL_MEM)+0xFFF)&-0x1000)
#define SKIN_SHMEM "/kolibri.skin"
#define SKIN_BASE (void*)0x11000000
#define TLS_BASE (void*)0x11FFF000L
#define TLS_SIZE 0x1000
#define CLIPBOARD_SHMEM "/kolibri.clip.%d"
#define CLIPBOARD_BASE (void*)0x12000000
#define HCTRL_SHMEM "/kolibri.heap.%d"
#define HCTRL_MEM_BASE (void*)0x1FFC0000
#define HCTRL_MEM_MAXSIZE 0x40000
#define APP_SHMEM "/kolibri.app.%d"
#define KEX_BASE (void*)0x20000000L
#define KEX_SIZE 0x40000000L
#define STUB_MEM_BASE (void*)0x5FFFF000
#define STUB_MEM_SIZE 0x1000
#define USER_SHMEM "/kolibri.usm.%d"
#define USER_SHMEM_START 0x3F000000
KERNEL_MEM* k_kernel_mem = NULL;
BYTE* k_base = NULL; DWORD k_base_size = 0, k_shmid = 0;
BYTE* k_heap_map = NULL; DWORD k_heap_map_size;
BYTE* k_skin_data = NULL; DWORD k_skin_size;
BYTE* k_stub = NULL; BYTE* k_tls_base = NULL;
char _init_keyboard_layout[3][128]={
"6\x1B"
"1234567890-=\x8\x9"
"qwertyuiop[]\xD"
"~asdfghjkl;\x27\x60\x0\\zxcvbnm,./\x0\x34\x35 "
"@234567890123\xB4\xB2\xB8\x36\xB0\x37"
"\xB3\x38\xB5\xB1\xB7\xB9\xB6"
"AB<D\377FGHIJKLMNOPQRSTUVWXYZ"
"ABCDEFGHIJKLMNOPQR",
"6\x1B"
"!@#$%^&*()_+\x8\x9"
"QWERTYUIOP{}\xD"
"~ASDFGHJKL:\"~\x0|ZXCVBNM<>?\x0\x34\x35 "
"@234567890123\xB4\xB2\xB8\x36\xB0\x37"
"\xB3\x38\xB5\xB1\xB7\xB9\xB6"
"AB>D\377FGHIJKLMNOPQRSTUVWXYZ"
"ABCDEFGHIJKLMNOPQR",
" \x1B"
" @ $ {[]}\\ \x8\x9"
" \xD"
" \x0 \x0\x34\x0 "
" \xB4\xB2\xB8\x36\xB0\x37"
"\xB3\x38\xB5\xB1\xB7\xB9\xB6"
"ABCD\377FGHIJKLMNOPQRSTUVWXYZ"
"ABCDEFGHIJKLMNOPQR"
};
void* k_shmem_open(char* name, int shmid, void* base, DWORD size, int prot, DWORD* psize)
{
char buf[64]; sprintf(buf, name, shmid); int fd;
if (psize != NULL)
{
fd = shm_open(buf, O_RDWR, 0660); if(fd < 0) return NULL;
struct stat st; fstat(fd, &st); *psize = size = st.st_size;
}
else
{
fd = shm_open(buf, O_CREAT|O_RDWR, 0660);
ftruncate(fd, size);
}
void* ret = mmap(base, size, PROT_READ|PROT_WRITE|prot, MAP_SHARED|MAP_FIXED, fd, 0);
close(fd); return ret;
}
void* k_shmem_resize(char* name, int shmid, void* base, DWORD oldsize, DWORD size)
{
char buf[64]; sprintf(buf, name, shmid);
int fd = shm_open(buf, O_RDWR, 0660); ftruncate(fd, size);
void* ret = mremap(base, oldsize, size, 0);
close(fd); return ret;
}
void k_shmem_unlink(char* name, int shmid)
{
char buf[64]; sprintf(buf, name, shmid); shm_unlink(buf);
}
void k_modify_ldt()
{
struct user_desc ldt_code = {1, (unsigned long)k_base, KEX_SIZE>>12, 1, MODIFY_LDT_CONTENTS_CODE, 0, 1, 0, 1};
struct user_desc ldt_data = {2, (unsigned long)k_base, KEX_SIZE>>12, 1, MODIFY_LDT_CONTENTS_DATA, 0, 1, 0, 1};
struct user_desc ldt_tls = {3, (unsigned long)k_tls_base, TLS_SIZE>>12, 1, MODIFY_LDT_CONTENTS_DATA, 0, 1, 0, 1};
modify_ldt(1, &ldt_code, sizeof(ldt_code));
modify_ldt(1, &ldt_data, sizeof(ldt_data));
modify_ldt(1, &ldt_tls, sizeof(ldt_tls));
}
void k_kernel_mem_open()
{
k_kernel_mem = (KERNEL_MEM*)k_shmem_open(KERNEL_SHMEM, k_shmid, KERNEL_MEM_BASE, KERNEL_MEM_SIZE, 0, NULL);
}
void k_kernel_mem_init()
{
k_kernel_mem_open();
memset(k_kernel_mem, 0, sizeof(KERNEL_MEM));
memcpy(k_kernel_mem->keyboard_layout, _init_keyboard_layout, sizeof(_init_keyboard_layout));
k_kernel_mem->keyboard_country = 1;
k_kernel_mem->keyboard_language = 1;
k_kernel_mem->mouse_dbl_click_delay = 50;
k_kernel_mem->pci_enabled = 1;
}
void k_kernel_mem_cleanup()
{
k_shmem_unlink(KERNEL_SHMEM, k_shmid);
k_shmem_unlink(SKIN_SHMEM, k_shmid);
}
KERNEL_MEM* kernel_mem()
{
return k_kernel_mem;
}
void* user_mem(DWORD addr)
{
return k_base+addr;
}
void k_mem_init(int shmid)
{
k_shmid = shmid;
k_kernel_mem_open();
k_stub = (BYTE*)mmap(STUB_MEM_BASE, STUB_MEM_SIZE, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE|MAP_ANONYMOUS|MAP_FIXED, 0, 0);
k_tls_base = (BYTE*)mmap(TLS_BASE, TLS_SIZE, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_FIXED, 0, 0);
}
BYTE* k_mem_open_app(int shmid, DWORD* psize)
{
void* ptr = k_shmem_open(APP_SHMEM, shmid, KEX_BASE, 0, 0, psize);
return ptr==MAP_FAILED ? NULL : ptr;
}
void k_mem_close_app(void* ptr, DWORD size)
{
munmap(ptr, size);
}
void k_mem_done(int shmid)
{
k_shmem_unlink(APP_SHMEM, shmid);
k_shmem_unlink(HCTRL_SHMEM, shmid);
}
void k_mem_reopen()
{
k_base = k_shmem_open(APP_SHMEM, k_shmid, KEX_BASE, 0, PROT_EXEC, &k_base_size);
k_heap_map = (BYTE*)k_shmem_open(HCTRL_SHMEM, k_shmid, HCTRL_MEM_BASE, 0, 0, &k_heap_map_size);
k_modify_ldt();
}
void* k_mem_alloc(DWORD size)
{
void* ptr; DWORD pages = ((size-1)>>12)+1; size = pages << 12;
if (size <= k_base_size) return k_base;
if (k_base == NULL)
{
ptr = k_shmem_open(APP_SHMEM, k_shmid, KEX_BASE, size, PROT_EXEC, NULL);
if(ptr != MAP_FAILED) memset(ptr, 0, size);
}
else
{
ptr = k_shmem_resize(APP_SHMEM, k_shmid, k_base, k_base_size, size);
if(ptr != MAP_FAILED) memset(k_base_size+(BYTE*)ptr, 0, size-k_base_size);
}
if (ptr != MAP_FAILED)
{
k_base = (BYTE*)ptr; k_base_size = size; k_modify_ldt();
}
return ptr;
}
void* k_mem_alloc_from_heap(DWORD size)
{
DWORD addr = k_heap_alloc(size);
return addr==0 ? NULL : k_base+addr;
}
void k_heap_set_param(BYTE* map, DWORD param)
{
map[0] = HTAG_PARAM|(param&0x7F);
map[1] = HTAG_PARAM|((param>>7)&0x7F);
map[2] = HTAG_PARAM|((param>>14)&0x7F);
}
void k_heap_clr_param(BYTE* map)
{
map[0] = HTAG_NONE;
map[1] = HTAG_NONE;
map[2] = HTAG_NONE;
}
DWORD k_heap_get_param(BYTE* map)
{
return ((map[2]&0x7F)<<14)|((map[1]&0x7F)<<7)|(map[0]&0x7F);
}
DWORD k_heap_get_pcount(BYTE* map)
{
DWORD pages = *map&HTAG_SZMASK;
return pages < HTAG_BIGSZ ? pages : k_heap_get_param(map+1);
}
void k_heap_mark(BYTE tag, BYTE* map, DWORD pages)
{
if (tag == HTAG_NONE)
{
if (*map != HTAG_NONE)
{
pages = *map&HTAG_SZMASK; *map = HTAG_NONE;
if (pages == HTAG_BIGSZ)
{
pages = k_heap_get_param(map+1);
k_heap_clr_param(map+1);
k_heap_clr_param(map+pages-3);
}
else
{
map[pages-1] = HTAG_NONE;
}
}
}
else
{
if (pages < HTAG_BIGSZ)
{
map[0] = tag|pages;
if (tag==HTAG_FREE) map[pages-1] = tag|pages;
}
else
{
map[0] = tag|HTAG_BIGSZ;
k_heap_set_param(map+1, pages);
if (tag==HTAG_FREE) k_heap_set_param(map+pages-3, pages);
}
}
}
BYTE* k_heap_find_free(DWORD pages)
{
BYTE* map; DWORD pmax = k_base_size>>12;
for(map = k_heap_map; map < k_heap_map+pmax; map += k_heap_get_pcount(map))
{
if (*map == HTAG_NONE)
{
return map+pages <= k_heap_map+pmax ? map : NULL;
}
if ((*map&HTAG_FREE)!=0 && k_heap_get_pcount(map)>=pages)
{
return map;
}
}
return NULL;
}
void k_heap_setsize(DWORD size)
{
DWORD pcount = ((size>>12)+0xFFF)&-0x1000;
if (k_heap_map == NULL)
{
k_heap_map = (BYTE*)k_shmem_open(HCTRL_SHMEM, k_shmid, HCTRL_MEM_BASE, pcount, 0, NULL);
memset(k_heap_map, 0, pcount);
k_heap_mark(HTAG_NORMAL, k_heap_map, k_base_size>>12);
k_heap_map_size = pcount;
}
else if(pcount>k_heap_map_size)
{
k_heap_map = (BYTE*)k_shmem_resize(HCTRL_SHMEM, k_shmid, k_heap_map, k_heap_map_size, pcount);
memset(k_heap_map+k_heap_map_size, 0, pcount-k_heap_map_size);
k_heap_map_size = pcount;
}
k_mem_alloc(size);
}
DWORD k_mem_size(DWORD size)
{
if (k_heap_map!=NULL) return 1;
return k_mem_alloc(size)==MAP_FAILED ? 1 : 0;
}
DWORD k_mem_get_size()
{
DWORD i; if(k_heap_map==NULL) return k_base_size;
for(i=(k_base_size>>12)-1; i>0 && k_heap_map[i]==0; --i);
if(k_heap_map[i]&HTAG_NORMAL) i += k_heap_map[i]&HTAG_SZMASK; else ++i;
return i<<12;
}
DWORD k_heap_init()
{
if (k_heap_map == NULL) k_heap_setsize(((k_base_size-1)|(HEAP_BLOCK_SIZE-1))+1);
return k_base_size;
}
DWORD k_heap_alloc_noclear(DWORD size)
{
if (size==0) return 0;
if (k_heap_map == NULL) k_heap_init();
DWORD pages = ((size-1)>>12)+1;
BYTE* map = k_heap_find_free(pages);
if (map == NULL)
{
DWORD hbs = ((size-1)|(HEAP_BLOCK_SIZE-1))+1;
k_heap_setsize(k_base_size+hbs);
map = k_heap_find_free(pages);
if(map == NULL) return 0;
}
if (*map == HTAG_NONE)
{
k_heap_mark(HTAG_NORMAL, map, pages);
}
else
{
DWORD pfree = k_heap_get_pcount(map)-pages;
k_heap_mark(HTAG_NONE, map, 0);
k_heap_mark(HTAG_NORMAL, map, pages);
if (pfree>0) k_heap_mark(HTAG_FREE, map+pages, pfree);
}
return (map-k_heap_map)<<12;
}
DWORD k_heap_alloc(DWORD size)
{
DWORD addr = k_heap_alloc_noclear(size);
if(addr) memset(user_mem(addr), 0, size);
return addr;
}
DWORD k_heap_free(DWORD addr)
{
if (addr==0 || addr >= k_base_size) return 0;
BYTE* map = k_heap_map + (addr>>12);
if ((*map&HTAG_NORMAL)==0) return 0;
DWORD pages = k_heap_get_pcount(map);
k_heap_mark(HTAG_NONE, map, 0);
if ((map[pages]&HTAG_FREE)!=0)
{
DWORD p2 = k_heap_get_pcount(map+pages);
k_heap_mark(HTAG_NONE, map+pages, 0);
pages += p2;
}
if ((map[-1]&HTAG_FREE)!=0)
{
DWORD p1 = map[-1]&HTAG_SZMASK; map -= p1;
k_heap_mark(HTAG_NONE, map, 0);
pages += p1;
}
else if ((map[-1]&HTAG_PARAM)!=0)
{
DWORD p1 = k_heap_get_param(map-3); map -= p1;
k_heap_mark(HTAG_NONE, map, 0);
pages += p1;
}
k_heap_mark(HTAG_FREE, map, pages);
return 1;
}
DWORD k_heap_realloc(DWORD addr, DWORD size)
{
if (addr==0) return k_heap_alloc(size);
if (size==0 || addr >= k_base_size) return 0;
BYTE* map = k_heap_map + (addr>>12);
if ((*map&HTAG_NORMAL)==0) return 0;
DWORD oldpages = k_heap_get_pcount(map);
DWORD oldsize = oldpages<<12;
if (size>0 && size<oldsize)
{
DWORD pages = ((size-1)>>12)+1;
if(pages==oldpages) return addr;
k_heap_mark(HTAG_NONE, map, 0);
k_heap_mark(HTAG_NORMAL, map, pages);
k_heap_mark(HTAG_FREE, map+pages, oldpages-pages);
return addr;
}
else
{
k_heap_free(addr); if(size==0) return 0;
DWORD newaddr = k_heap_alloc_noclear(size);
if (newaddr==0) return 0;
if (newaddr==addr) return addr;
memmove(k_base+newaddr, k_base+addr, size<oldsize ? size : oldsize);
return newaddr;
}
}
#define USM_READ 0
#define USM_WRITE 1
#define USM_OPEN_ALWAYS 4
#define USM_CREATE 8
int k_find_usm(DWORD aname)
{
if(aname>=k_base_size) return -1;
int i; char* pname = user_mem(aname);
k_user_shm* usm = k_kernel_mem->usm;
for(i=0; i<MAX_USM; ++i) if(usm[i].tcount!=0 && strcmp(pname, usm[i].name)==0) return i;
return -1;
}
int k_find_free_usm()
{
k_user_shm* usm = k_kernel_mem->usm;
int i; for(i=0; i<MAX_USM; ++i) if(usm[i].tcount==0) return i;
return -1;
}
DWORD k_usm_open(k_context* ctx, DWORD aname, DWORD size, DWORD flags, DWORD* addr)
{
int id = k_find_usm(aname),i; DWORD top = USER_SHMEM_START; *addr = 0;
if(id<0 && (flags&(USM_CREATE|USM_OPEN_ALWAYS))==0) return 5;
if(id>=0 && (flags&USM_CREATE)!=0) return 10;
k_user_shm* usm = k_kernel_mem->usm; int clr = (id<0);
if(id<0) {
id = k_find_free_usm(); if(id<0) return 30;
strncpy(usm[id].name, user_mem(aname), 31); usm[id].flags = flags;
}
else
{
if((USM_WRITE&flags&~usm[id].flags)!=0) return 10;
}
for(i=0; i<MAX_USM; ++i) if(ctx->usm_addr[i]!=0 && ctx->usm_addr[i]+ctx->usm_size[i]>top) top = ctx->usm_addr[i]+ctx->usm_size[i];
BYTE* ptr = top+k_base; size = ((size-1)|0xFFF)+1;
ptr = k_shmem_open(USER_SHMEM, id, ptr, size, 0, (flags&(USM_CREATE|USM_OPEN_ALWAYS))!=0 ? NULL : &size);
ctx->usm_size[id] = size;
ctx->usm_addr[id] = *addr = ptr-k_base;
usm[id].tcount++;
if(clr) memset(ptr, 0, size);
return 0;
}
DWORD k_usm_close(k_context* ctx, DWORD aname)
{
int id = k_find_usm(aname); if (id<0) return 5;
k_user_shm* usm = k_kernel_mem->usm+id;
munmap(user_mem(ctx->usm_addr[id]), ctx->usm_size[id]);
ctx->usm_addr[id] = ctx->usm_size[id] = 0;
if(usm->tcount--==0) k_shmem_unlink(USER_SHMEM, id);
return 0;
}
void k_usm_clean(k_context* ctx)
{
int i; k_user_shm* usm = k_kernel_mem->usm;
for(i=0; i<MAX_USM; ++i) if(ctx->usm_addr[i]!=0)
if(usm[i].tcount--==0) k_shmem_unlink(USER_SHMEM, i);
}
void* k_skin_alloc(DWORD size)
{
if(k_skin_data!=NULL) k_skin_close();
size = (size+0xFFF)&-0x1000;
return k_skin_data = (BYTE*)k_shmem_open(SKIN_SHMEM, 0, SKIN_BASE, k_skin_size = size, 0, NULL);
}
BYTE* k_skin_open()
{
if(k_skin_data!=NULL) k_skin_close();
return k_skin_data = (BYTE*)k_shmem_open(SKIN_SHMEM, 0, SKIN_BASE, 0, 0, &k_skin_size);
}
void k_skin_close()
{
if(k_skin_data==NULL) return;
munmap(k_skin_data, k_skin_size); k_skin_data = NULL;
}
DWORD k_clipboard_add(DWORD size, DWORD addr)
{
DWORD* ptr = k_shmem_open(CLIPBOARD_SHMEM, k_kernel_mem->clipboard_count++, CLIPBOARD_BASE, size, 0, NULL);
if(ptr == MAP_FAILED) return 1;
memcpy(ptr, user_pd(addr), size); *ptr = size;
munmap(ptr, size);
return 0;
}
DWORD k_clipboard_get(DWORD id)
{
DWORD size,addr,*ptr = k_shmem_open(CLIPBOARD_SHMEM, id, CLIPBOARD_BASE, 0, 0, &size);
if(ptr == MAP_FAILED) return 1;
addr = k_heap_alloc((size+0xFFF)&-0x1000);
memcpy(user_pd(addr), ptr, size);
munmap(ptr, size);
return addr;
}
DWORD k_clipboard_remove_last()
{
if(k_kernel_mem->clipboard_count==0) return 1;
k_shmem_unlink(CLIPBOARD_SHMEM, --k_kernel_mem->clipboard_count);
return 0;
}
DWORD k_stub_resume(DWORD eip)
{
// dd 17h / mov ss,[3FFFF000h] / jmp eip
memcpy(k_stub, "\x17\x0\x0\x0\x8E\x15\x0\xF0\xFF\x3F\xE9", 11);
*(DWORD*)(k_stub+11) = eip - 0x3FFFF00F;
return 0x3FFFF004;
}
DWORD k_stub_jmp(DWORD eip, DWORD esp)
{
// mov esp,# / jmp eip
memcpy(k_stub, "\xBC\x0\x0\x0\x0\xE9", 6);
*(DWORD*)(k_stub+1) = esp;
*(DWORD*)(k_stub+6) = eip - 0x3FFFF00A;
return 0x3FFFF000;
}
#ifdef __x86_64__
QWORD __k_fsbase;
#include <asm/prctl.h>
int arch_prctl(int code, ...);
void k_save_fsbase()
{
arch_prctl(ARCH_GET_FS, &__k_fsbase);
}
void k_load_fsbase()
{
arch_prctl(ARCH_SET_FS, __k_fsbase);
}
void k_set_fsbase()
{
arch_prctl(ARCH_SET_FS, (QWORD)TLS_BASE);
}
#endif