mathieu/matos
1
1
Fork 0
Code Issues Pull Requests Releases Wiki Activity

Alloc: could be initialized in random way

Browse Source 
fix ENO usage
This commit is contained in:
Mathieu Maret 2019-04-15 21:35:38 +02:00
parent 6c91272fc2
commit f1b3895473
4 changed files with 47 additions and 18 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

58
core/alloc.c
View File

@ -11,32 +11,56 @@
#define SLUB_SIZE (PAGE_SHIFT - 1)
struct slabDesc *slub;
int initSlabDesc(struct slabDesc **desc, size_t size);
int addSlab(struct slabDesc **desc, size_t size);
static int formatPage(struct slabDesc *desc, size_t size);
int initSlab(void)
int allocInit(void)
{
uint start = log2(sizeof(void *));
list_init(slub);
for (uint i = start; i < SLUB_SIZE; i++) {
struct slabDesc *slab;
if (initSlabDesc(&slab, 1U << i))
return ENOMEM;
list_add_tail(slub, slab);
int ret;
if ((ret = allocBookSlab(1U << i))) {
pr_devel("Fail to allocBookSlab %d\n", ret);
return -ENOMEM;
}
}
return 0;
}
int initSlabDesc(struct slabDesc **desc, size_t size)
int allocBookSlab(size_t size)
{
struct slabDesc *slabEntry;
struct slabDesc *slab;
int slabIdx;
int ret;
if ((ret = addSlab(&slabEntry, size)))
return ret;
list_foreach(slub, slab, slabIdx)
{
if (slab->size == size) {
pr_devel("Slab already exist");
return -EEXIST;
}
if (slab->size > size) {
list_insert_before(slub, slab, slabEntry);
return 0;
}
}
list_add_tail(slub, slabEntry);
return 0;
}
int addSlab(struct slabDesc **desc, size_t size)
{
if (size > PAGE_SIZE)
return ENOENT;
return -ENOENT;
paddr_t alloc = allocPhyPage();
if (alloc == (paddr_t)NULL)
return ENOMEM;
if (pageMap((vaddr_t)alloc, alloc, PAGING_MEM_WRITE)) {
return ENOMEM;
}
return -ENOMEM;
if (pageMap((vaddr_t)alloc, alloc, PAGING_MEM_WRITE))
return -ENOMEM;
*desc = (struct slabDesc *)alloc;
list_singleton(*desc, *desc);
(*desc)->page = (vaddr_t)alloc;
@ -64,7 +88,7 @@ static void *allocFromSlab(struct slabDesc *slab)
{
vaddr_t *next = slab->freeEl;
if (*next == (vaddr_t)NULL) {
pr_devel("Slab %d full\n", slab);
pr_devel("Slab @%d for %d full\n", slab, slab->size);
slab->full = 1;
} else {
slab->freeEl = (void *)(*next);
@ -82,7 +106,7 @@ void *malloc(size_t size)
uint slubIdx = 0;
list_foreach(slub, slubEntry, slubIdx)
{
if(size <= slubEntry->size)
if (size <= slubEntry->size)
break;
}
struct slabDesc *slab;
@ -96,7 +120,11 @@ void *malloc(size_t size)
}
if (!list_foreach_early_break(slubEntry, slab, slabIdx)) {
struct slabDesc *newSlab;
initSlabDesc(&newSlab, slab->size);
int ret;
if ((ret = addSlab(&newSlab, slab->size))) {
pr_devel("Fail to addSlab %d\n", ret);
return NULL;
}
list_add_head(slubEntry, newSlab);
return allocFromSlab(newSlab);
}

3
core/alloc.h
View File

@ -10,6 +10,7 @@ struct slabDesc {
struct slabDesc *next;
struct slabDesc *prev;
};
int initSlab(void);
int allocInit(void);
int allocBookSlab(size_t size);
void *malloc(size_t size);

2
core/main.c
View File

@ -81,7 +81,7 @@ void kmain(unsigned long magic, unsigned long addr)
printf("Setting up Serial link (115200)\n");
serialSetup(115200);
initSlab();
allocInit();
#ifdef RUN_TEST
run_test();
#endif

2
core/paging.c
View File

@ -141,7 +141,7 @@ int pageMap(vaddr_t vaddr, paddr_t paddr, int flags)
if (!pd[pdEntry].present) {
paddr_t ptPhy = allocPhyPage();
if (ptPhy == (vaddr_t)NULL)
return ENOMEM;
return -ENOMEM;
pd[pdEntry].user = (flags & PAGING_MEM_USER) ? 1 : 0;
pd[pdEntry].present = 1;